liu.seSearch for publications in DiVA
12 51 - 88 of 88
rss atomLink to result list
Permanent link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
  • Schminder, Jörg
    et al.
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    Hällqvist, Robert
    Systems Simulation and Concept Design, Saab Aeronautics, Linköping, Sweden.
    Eek, Magnus
    Systems Simulation and Concept Design, Saab Aeronautics, Linköping, Sweden.
    Gårdhagen, Roland
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    PILOT PERFORMANCE AND HEAT STRESS ASSESSMENTSUPPORT USING A COCKPIT THERMOREGULATORYSIMULATION MODEL2018In: ICAS congress proceeding, International Council of the Aeronautical Sciences , 2018, article id ICAS2018_0463Conference paper (Other academic)
    Abstract [en]

    Flights with high thermal loads inside the cockpitcan have a considerable impact on pilot physiologicaland psychological performance resultingin thermal discomfort, dehydration and fatigue.In this work, a Functional Mock-up Interface(FMI) based aircraft system simulator is utilizedwith intent to compute and predict thermalcomfort. The simulator can for example serve pilotsas a tool for heat stress and flight risk assessment,supporting their pre-flight planning or beused by engineers to design and optimize coolingefficiency during an early aircraft design phase.Furthermore, the presented simulator offers severaladvantages such as map based thermal comfortanalysis for a complete flight envelop, timeresolved mental performance prediction, and aflexible composability of the included models.

  • Alfredson, Jens
    et al.
    SAAB, Linköping, Sweden.
    Johansson, Björn
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    Gonzaga Trabasso, Luis
    Aeronautics Institute of Technology, Brazil.
    Schminder, Jörg
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    Granlund, Rego
    Research Institutes of Sweden SICS East, Linköping, Sweden.
    Gårdhagen, Roland
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    DESIGN OF A DISTRIBUTED HUMAN FACTORS LABORATORY FOR FUTURE AIRSYSTEMS2018In: ICAS congress proceeding, International Council of the Aeronautical Sciences , 2018, article id ICAS2018_0305Conference paper (Other academic)
    Abstract [en]

    This paper presents a rationale for structuring a distributed human factors laboratory for future air systems. The distributed herein refers to two aspects: content and geographic. As for content, the laboratory is structured in two levels, namely, individual, and team. As for geographic, the laboratory infrastructure is distributed in three physically separate facilities, namely, Department of Computer and Information Science (IDA) and Department of Management and Engineering (IEI) from Linköping University – Sweden and the Competence Center in Manufacturing from the Aeronautics Institute of Technology (ITA) – Brazil.

  • Hällqvist, Robert
    et al.
    Systems Simulation and Concept Design, Saab Aeronautics, Linköping, Sweden.
    Schminder, Jörg
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    Eek, Magnus
    Systems Simulation and Concept Design, Saab Aeronautics, Linköping, Sweden.
    Braun, Robert
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.
    Gårdhagen, Roland
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, Faculty of Science & Engineering.
    NOVEL FMI AND TLM-BASED DESKTOP SIMULATOR FORDETAILED STUDIES OF THERMAL PILOT COMFORT2018In: ICAS congress proceeding, International Council of the Aeronautical Sciences , 2018, article id ICAS2018_0203Conference paper (Other academic)
    Abstract [en]

    Modelling and Simulation is key in aircraft systemdevelopment. This paper presents a novel,multi-purpose, desktop simulator that can beused for detailed studies of the overall performanceof coupled sub-systems, preliminary controldesign, and multidisciplinary optimization.Here, interoperability between industrially relevanttools for model development and simulationis established via the Functional MockupInterface (FMI) and System Structure andParametrization (SSP) standards. Robust anddistributed simulation is enabled via the TransmissionLine element Method (TLM). The advantagesof the presented simulator are demonstratedvia an industrially relevant use-case wheresimulations of pilot thermal comfort are coupledto Environmental Control System (ECS) steadystateand transient performance.

  • Fors, Victor
    et al.
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    Olofsson, Björn
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    Nielsen, Lars
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    Formulation and interpretation of optimal braking and steering patterns towards autonomous safety-critical manoeuvres2018In: Vehicle System Dynamics, ISSN 0042-3114, E-ISSN 1744-5159, p. 1-18Article in journal (Refereed)
    Abstract [en]

    Stability control of a vehicle in autonomous safety-critical at-the-limit manoeuvres is analysed from the perspective of lane keeping or lane changing, rather than that of yaw control as in traditional ESC systems. An optimal control formulation is developed, where the optimisation criterion is a linear combination of the initial and final velocity of the manoeuvre. Varying the interpolation parameter in this formulation turns out to result in an interesting family of optimal braking and steering patterns in stabilising manoeuvres. The two different strategies of optimal lane-keeping control and optimal yaw control are shown to be embedded in the formulation and result from the boundary values of the parameter. The results provide new insights and have the potential to be used for future safety systems that adapt the level of braking to the situation at hand, which is demonstrated through examples of how to exploit theresults.

  • Andersson Naesseth, Christian
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, Faculty of Science & Engineering.
    Machine learning using approximate inference: Variational and sequential Monte Carlo methods2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Automatic decision making and pattern recognition under uncertainty are difficult tasks that are ubiquitous in our everyday life. The systems we design, and technology we develop, requires us to coherently represent and work with uncertainty in data. Probabilistic models and probabilistic inference gives us a powerful framework for solving this problem. Using this framework, while enticing, results in difficult-to-compute integrals and probabilities when conditioning on the observed data. This means we have a need for approximate inference, methods that solves the problem approximately using a systematic approach. In this thesis we develop new methods for efficient approximate inference in probabilistic models.

    There are generally two approaches to approximate inference, variational methods and Monte Carlo methods. In Monte Carlo methods we use a large number of random samples to approximate the integral of interest. With variational methods, on the other hand, we turn the integration problem into that of an optimization problem. We develop algorithms of both types and bridge the gap between them.

    First, we present a self-contained tutorial to the popular sequential Monte Carlo (SMC) class of methods. Next, we propose new algorithms and applications based on SMC for approximate inference in probabilistic graphical models. We derive nested sequential Monte Carlo, a new algorithm particularly well suited for inference in a large class of high-dimensional probabilistic models. Then, inspired by similar ideas we derive interacting particle Markov chain Monte Carlo to make use of parallelization to speed up approximate inference for universal probabilistic programming languages. After that, we show how we can make use of the rejection sampling process when generating gamma distributed random variables to speed up variational inference. Finally, we bridge the gap between SMC and variational methods by developing variational sequential Monte Carlo, a new flexible family of variational approximations.

    List of papers
    1. Capacity estimation of two-dimensional channels using Sequential Monte Carlo
    Open this publication in new window or tab >>Capacity estimation of two-dimensional channels using Sequential Monte Carlo
    2014 (English)In: 2014 IEEE Information Theory Workshop, 2014, p. 431-435Conference paper, Published paper (Refereed)
    Abstract [en]

    We derive a new Sequential-Monte-Carlo-based algorithm to estimate the capacity of two-dimensional channel models. The focus is on computing the noiseless capacity of the 2-D (1, ∞) run-length limited constrained channel, but the underlying idea is generally applicable. The proposed algorithm is profiled against a state-of-the-art method, yielding more than an order of magnitude improvement in estimation accuracy for a given computation time.

    National Category
    Control Engineering Computer Sciences Probability Theory and Statistics
    Identifiers
    urn:nbn:se:liu:diva-112966 (URN)10.1109/ITW.2014.6970868 (DOI)
    Conference
    Information Theory Workshop
    Available from: 2015-01-06 Created: 2015-01-06 Last updated: 2018-11-09
    2. Sequential Monte Carlo for Graphical Models
    Open this publication in new window or tab >>Sequential Monte Carlo for Graphical Models
    2014 (English)In: Advances in Neural Information Processing Systems, 2014, p. 1862-1870Conference paper, Published paper (Refereed)
    Abstract [en]

    We propose a new framework for how to use sequential Monte Carlo (SMC) algorithms for inference in probabilistic graphical models (PGM). Via a sequential decomposition of the PGM we find a sequence of auxiliary distributions defined on a monotonically increasing sequence of probability spaces. By targeting these auxiliary distributions using SMC we are able to approximate the full joint distribution defined by the PGM. One of the key merits of the SMC sampler is that it provides an unbiased estimate of the partition function of the model. We also show how it can be used within a particle Markov chain Monte Carlo framework in order to construct high-dimensional block-sampling algorithms for general PGMs.

    National Category
    Computer Sciences Probability Theory and Statistics Control Engineering
    Identifiers
    urn:nbn:se:liu:diva-112967 (URN)
    Conference
    Neural Information Processing Systems (NIPS)
    Available from: 2015-01-06 Created: 2015-01-06 Last updated: 2018-11-09Bibliographically approved
    3. Nested Sequential Monte Carlo Methods
    Open this publication in new window or tab >>Nested Sequential Monte Carlo Methods
    2015 (English)In: Proceedings of The 32nd International Conference on Machine Learning / [ed] Francis Bach, David Blei, Journal of Machine Learning Research (Online) , 2015, Vol. 37, p. 1292-1301Conference paper, Published paper (Refereed)
    Abstract [en]

    We propose nested sequential Monte Carlo (NSMC), a methodology to sample from sequences of probability distributions, even where the random variables are high-dimensional. NSMC generalises the SMC framework by requiring only approximate, properly weighted, samples from the SMC proposal distribution, while still resulting in a correct SMC algorithm. Furthermore, NSMC can in itself be used to produce such properly weighted samples. Consequently, one NSMC sampler can be used to construct an efficient high-dimensional proposal distribution for another NSMC sampler, and this nesting of the algorithm can be done to an arbitrary degree. This allows us to consider complex and high-dimensional models using SMC. We show results that motivate the efficacy of our approach on several filtering problems with dimensions in the order of 100 to 1 000.

    Place, publisher, year, edition, pages
    Journal of Machine Learning Research (Online), 2015
    Series
    JMLR Workshop and Conference Proceedings, ISSN 1938-7228 ; 37
    National Category
    Computer Sciences Control Engineering Probability Theory and Statistics
    Identifiers
    urn:nbn:se:liu:diva-122698 (URN)
    Conference
    32nd International Conference on Machine Learning, Lille, France, 6-11 July, 2015
    Available from: 2015-11-16 Created: 2015-11-16 Last updated: 2018-11-09Bibliographically approved
    4. Interacting Particle Markov Chain Monte Carlo
    Open this publication in new window or tab >>Interacting Particle Markov Chain Monte Carlo
    Show others...
    2016 (English)In: Proceedings of the 33rd International Conference on Machine Learning (ICML), 2016Conference paper, Published paper (Refereed)
    Abstract [en]

    We introduce interacting particle Markov chain Monte Carlo (iPMCMC), a PMCMC method based on an interacting pool of standard and conditional sequential Monte Carlo samplers. Like related methods, iPMCMC is a Markov chain Monte Carlo sampler on an extended space. We present empirical results that show significant improvements in mixing rates relative to both non-interacting PMCMC samplers and a single PMCMC sampler with an equivalent memory and computational budget. An additional advantage of the iPMCMC method is that it is suitable for distributed and multi-core architectures.

    Keywords
    Sequential Monte Carlo, Probabilistic programming, parallelisation
    National Category
    Computer Sciences Control Engineering Probability Theory and Statistics
    Identifiers
    urn:nbn:se:liu:diva-130043 (URN)
    Conference
    International Conference on Machine Learning (ICML), New York, USA, June 19-24, 2016
    Projects
    CADICS
    Funder
    Cancer and Allergy Foundation
    Available from: 2016-07-05 Created: 2016-07-05 Last updated: 2018-11-09
    5. Reparameterization Gradients through Acceptance-Rejection Sampling Algorithms
    Open this publication in new window or tab >>Reparameterization Gradients through Acceptance-Rejection Sampling Algorithms
    2017 (English)In: Proceedings of the 20th International Conference on Artificial Intelligence and Statistics, 2017Conference paper, Published paper (Refereed)
    Abstract [en]

    Variational inference using the reparameterization trick has enabled large-scale approximate Bayesian inference in complex probabilistic models, leveraging stochastic optimization to sidestep intractable expectations. The reparameterization trick is applicable when we can simulate a random variable by applying a differentiable deterministic function on an auxiliary random variable whose distribution is fixed. For many distributions of interest (such as the gamma or Dirichlet), simulation of random variables relies on acceptance-rejection sampling. The discontinuity introduced by the accept-reject step means that standard reparameterization tricks are not applicable. We propose a new method that lets us leverage reparameterization gradients even when variables are outputs of a acceptance-rejection sampling algorithm. Our approach enables reparameterization on a larger class of variational distributions. In several studies of real and synthetic data, we show that the variance of the estimator of the gradient is significantly lower than other state-of-the-art methods. This leads to faster convergence of stochastic gradient variational inference.

    Series
    Proceedings of Machine Learning Research, ISSN 1938-7228 ; 54
    National Category
    Computer Sciences
    Identifiers
    urn:nbn:se:liu:diva-152645 (URN)
    Conference
    Artificial Intelligence and Statistics, 20-22 April 2017, Fort Lauderdale, FL, USA
    Available from: 2018-11-09 Created: 2018-11-09 Last updated: 2018-11-21
    6. Variational Sequential Monte Carlo
    Open this publication in new window or tab >>Variational Sequential Monte Carlo
    2018 (English)In: Proceedings of the Twenty-First International Conference on Artificial Intelligence and Statistics, 2018Conference paper, Published paper (Refereed)
    Abstract [en]

    Many recent advances in large scale probabilistic inference rely on variational methods. The success of variational approaches depends on (i) formulating a flexible parametric family of distributions, and (ii) optimizing the parameters to find the member of this family that most closely approximates the exact posterior. In this paper we present a new approximating family of distributions, the variational sequential Monte Carlo (VSMC) family, and show how to optimize it in variational inference. VSMC melds variational inference (VI) and sequential Monte Carlo (SMC), providing practitioners with flexible, accurate, and powerful Bayesian inference. The VSMC family is a variational family that can approximate the posterior arbitrarily well, while still allowing for efficient optimization of its parameters. We demonstrate its utility on state space models, stochastic volatility models for financial data, and deep Markov models of brain neural circuits.

    National Category
    Computer Sciences
    Identifiers
    urn:nbn:se:liu:diva-152646 (URN)
    Conference
    International Conference on Artificial Intelligence and Statistics, Playa Blanca, Lanzarote, Canary Islands, April 9 - 11, 2018
    Available from: 2018-11-09 Created: 2018-11-09 Last updated: 2018-11-16Bibliographically approved
  • Wallheim, Henrik
    Litteraturvetenskapliga institutionen, Uppsala universitet, Uppsala, Sweden.
    Intrigteknik och läsarintresse i 1700-talets svenska fiktionsprosa: Exemplet Erik Erland Ullmans Den Swenska Fröken2010In: Samlaren: tidskrift för svensk litteraturvetenskaplig forskning, ISSN 0348-6133, E-ISSN 2002-3871, Vol. 131, p. 86-107Article in journal (Refereed)
    Abstract [en]

    Henrik Wallheim, Intrigteknik och läsarintresse i 1700-talets svenska fiktionsprosa. Exemplet Erik Erland Ullmans Den Swenska Fröken (Plot and Reader Interest in 18th-Century Swedish Prose Fiction. The Example of Erik Erland Ullman’s Den Swenska Fröken)

    This essay discusses an example of 18th-century Swedish prose fiction – Erik Erland Ullman's (1749–1821) Den Swenska Fröken (1780; ”The Swedish Miss”) – in order to specify questions and methodical outlines for a continued study of the Swedish novel of the time. The focus is on the construction of the plot, and on the related question of how the author tries to arouse and sustain the interest of the reader.

    The analysis shows that Ullman's story is not constructed around a continuous plotline connecting the beginning with the end, but around a series of essentially unrelated events which occur in the life of the principal character – a narrative structure which strikingly differs from the currently common opinion that a novel ought to have a ”well-made” plot. However, the principal audience for this kind of story appears to have considered a large number of sensational events to be of greater importance than the stringing together of these into a ”well-made” plot – a taste which is discussed in relation to the changing social make-up of the reading audience.

  • Wijeratne, Kosala
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
    Conducting Polymer Electrodes for Thermogalvanic Cells2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Fossil fuels are still the dominant (ca. 80%) energy source in our society. A significant fraction is used to generate electricity with a heat engine possessing an efficiency of approximately 35%. Therefore, about 65% of fossil fuel energy is wasted in heat. Other primary heat sources include solar and geothermal energies that can heat up solid and fluids up to 150°C. The growing demand and severe environmental impact of energy systems provide an impetus for effective management and harvesting solutions dealing with waste heat. A promising way to use waste heat is to directly convert thermal energy into electrical energy by thermoelectric generators (TEGs). Solid state TEGs are electronic devices that generate electrical power due to the thermo-diffusion of electronic charge carriers in the semiconductor upon application of the thermal field. However, there is another type of thermoelectric device that has been much less investigated; this is the thermogalvanic cell (TGCs). The TGC is an electrochemical device that consists of the electrolyte solution including a reversible redox couple sandwiched between two electrodes. In our study, we focus on iron-based organometallic molecules in aqueous electrolyte. A temperature difference (Δ𝑇) between the electrodes promotes a difference in the electrode potentials [Δ𝐸(𝑇)]. Since the electrolyte contains a redox couple acting like electronic shuttle between the two electrodes, power can be generated when the two electrodes are submitted to a temperature difference. The focus of this thesis is (i) to investigate the possibility to use conducting polymer electrodes for thermogalvanic cells as an alternative to platinum and carbon-based electrodes, (ii) to investigate the role of viscosity of the electrolyte in order to consider polymer electrolytes, (iii) to understand the mechanisms limiting the electrical power output in TGCs; and (iv) to understand the fundamentals of the electron transfer taking place at the interface between the polymer electrode and the redox molecule in the electrolyte. These findings provide an essential toolbox for further improvement in conducting polymer thermogalvanic cells and various other emerging electrochemical technologies such as fuel cells, redox flow battery, dye-sensitized solar cells and industrial electrochemical synthesis.

    List of papers
    1. Poly(3,4-ethylenedioxythiophene)-Tosylate (PEDOT-Tos) electrode in Thermogalvanic Cells
    Open this publication in new window or tab >>Poly(3,4-ethylenedioxythiophene)-Tosylate (PEDOT-Tos) electrode in Thermogalvanic Cells
    2017 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 5, no 37, p. 19619-19625Article in journal (Refereed) Published
    Abstract [en]

    The interest in thermogalvanic cells (TGCs) has grown because it is a candidate technology for harvesting electricity from natural and waste heat. However, the cost of TGCs has a major component due to the use of the platinum electrode. Here, we investigate new alternative electrode material based on conducting polymers, more especially poly(3,4-ethylenedioxythiophene)-Tosylate (PEDOT-Tos) together with the Ferro/Ferricyanide redox electrolyte. The power generated by the PEDOT-Tos based TGCs increases with the conducting polymer thickness/multilayer and reaches values similar to the flat platinum electrode based TGCs. The physics and chemistry behind this exciting result as well as the identification of the limiting phenomena are investigated by various electrochemical techniques. Furthermore, a preliminary study is provided for the stability of the PEDOT-Tos based TGCs.

    Place, publisher, year, edition, pages
    Royal Society of Chemistry, 2017
    National Category
    Chemical Sciences
    Identifiers
    urn:nbn:se:liu:diva-140745 (URN)10.1039/C7TA04891B (DOI)000411739700007 ()
    Note

    Funding agencies: European Research Council (ERC) [307596]

    Available from: 2017-09-11 Created: 2017-09-11 Last updated: 2018-11-27
    2. Bulk electronic transport impacts on electron transfer at conducting polymer electrode-electrolyte interfaces.
    Open this publication in new window or tab >>Bulk electronic transport impacts on electron transfer at conducting polymer electrode-electrolyte interfaces.
    Show others...
    2018 (English)In: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, no 7, p. 11899-11904Article in journal (Refereed) Epub ahead of print
    Abstract [en]

    Electrochemistry is an old but still flourishing field of research due to the importance of the efficiency and kinetics of electrochemical reactions in industrial processes and (bio-)electrochemical devices. The heterogeneous electron transfer from an electrode to a reactant in the solution has been well studied for metal, semiconductor, metal oxide, and carbon electrodes. For those electrode materials, there is little correlation between the electronic transport within the electrode material and the electron transfer occurring at the interface between the electrode and the solution. Here, we investigate the heterogeneous electron transfer between a conducting polymer electrode and a redox couple in an electrolyte. As a benchmark system, we use poly(3,4-ethylenedioxythiophene) (PEDOT) and the Ferro/ferricyanide redox couple in an aqueous electrolyte. We discovered a strong correlation between the electronic transport within the PEDOT electrode and the rate of electron transfer to the organometallic molecules in solution. We attribute this to a percolation-based charge transport within the polymer electrode directly involved in the electron transfer. We show the impact of this finding by optimizing an electrochemical thermogalvanic cell that transforms a heat flux into electrical power. The power generated by the cell increased by four orders of magnitude on changing the morphology and conductivity of the polymer electrode. As all conducting polymers are recognized to have percolation transport, we believe that this is a general phenomenon for this family of conductors.

    Place, publisher, year, edition, pages
    National academy of sciences, 2018
    Keywords
    conducting polymer, electron transfer, thermogalvanic cell
    National Category
    Materials Chemistry
    Identifiers
    urn:nbn:se:liu:diva-152759 (URN)10.1073/pnas.1806087115 (DOI)000450642800036 ()30397110 (PubMedID)
    Note

    Funding agencies: Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University Faculty Grant [SFO-Mat-LiU 2009-00971]

    Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2018-12-13
  • Harnesk, Gustav
    et al.
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Galzie, Zara
    Linköping University, Department of Management and Engineering, Information Systems. Linköping University, Faculty of Arts and Sciences.
    Mobile Devices in the Public Healthcare Sector: Perceptions, Experiences and Expectations of Nursing Care Providers2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    There are high expectations regarding mobile technology and how it can be used to promote improvements in the quality and efficiency in healthcare. There appears to be a gap between the goals and strategy on the macro level and the micro level experiences of the usage of mobile devices among healthcare professionals.

     

    The purpose of this study is to examine the perceptions, experiences and expectations of nursing care providers at two wards with regards to the recently implemented mobile platform COSMIC Nova Ward and other related IT artefacts. Special emphasis has been on COSMIC Nova Ward Tablet, a part of COSMIC Nova Ward, facilitated in iPad MINIs. It is designed to act as a tool to facilitate the provision of care and has been introduced at both the wards during a pilot project. Even though the two wards are similar in both practice and structure, the pilot project resulted in failure at one of the wards and a relative success at the other.

     

    A comparative case study of the perceptions, experiences and expectations of the nursing personnel at the two wards was conducted in order to highlight the differences in the outcomes of the pilot project. By reflexively comparing these with theory, it was concluded that there are several factors other than adequacy of the IT system that determine the outcome of the implementation of a mobile platform in a clinical setting.

     

    These findings were then compared with existing legislation and policies, in order to identify potential discrepancies between the nursing personnel’s usage of IT with the regional and national goals and strategy. It was then determined that there needs to be a clear connection between the usage of IT and the goals and strategy within healthcare.

  • Public defence: 2019-01-25 13:00 ACAS, A-Building, Linköping
    Radits, Markus
    Linköping University, Department of Management and Engineering, Industrial Economics. Linköping University, Faculty of Science & Engineering.
    A Business Ecology Perspective on Community-Driven Open Source: The Case of the Free and Open Source Content Management System Joomla2019Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This thesis approaches the phenomenon of open source software (OSS) from a managerial and organisational point of view. In a slightly narrower sense, this thesis studies commercialisation aspects around community-driven open source. The term ‘community-driven’ signifies open source projects that are managed, steered, and controlled by communities of volunteers, as opposed to those that are managed, steered, and controlled by single corporate sponsors.

    By adopting a business ecology perspective, this thesis places emphasis on the larger context within which the commercialisation of OSS is embedded (e.g., global and collaborative production regimes, ideological foundations, market characteristics, and diffuse boundary conditions). Because many business benefits arise as a consequence of the activities taking place in the communities and ecosystems around open source projects, a business ecology perspective may be a useful analytical guide for understanding the opportunities, challenges, and risks that firms face in commercializing OSS.

    There are two overarching themes guiding this thesis. The first theme concerns the challenges that firms face in commercialising community-driven open source. There is a tendency in the literature on business ecosystems and open source to emphasise the benefits, opportunities, and positive aspects of behaviour, at the expense of the challenges that firms face. However, business ecosystems are not only spaces of opportunity, they may also pose a variety of challenges that firms need to overcome in order to be successful. To help rectify this imbalance in the literature, the first theme particularly focuses on the challenges that firms face in commercialising community-driven open source. The underlying ambition is to facilitate a more balanced and holistic understanding of the collaborative and competitive dynamics in ecosystems around open source projects.

    The other theme concerns the complex intertwining of community engagement and profit-oriented venturing. As is acknowledged in the literature, the subject of firm-community interaction has become increasingly important because the survival, success, and sustainability of peer production communities has become of strategic relevance to many organisations. However, while many strategic benefits may arise as a consequence of firm-community interaction, there is a lack of research studying how the value-creating logics of firm–community interaction are embedded within the bigger picture in which they occur. Bearing this bigger picture in mind, this thesis explores the intertwining of volunteer community engagement and profit-oriented venturing by focusing on four aspects that are theorised in the literature: reinforcement, complementarity, synergy, and reciprocity.

    This thesis is designed as a qualitative exploratory single-case study. The empirical case is Joomla, a popular open source content management system. In a nutshell, the Joomla case in this thesis comprises the interactions in the Joomla community and the commercial activities around the Joomla platform (e.g., web development, consulting, marketing, customisation, extensions). In order to achieve greater analytical depth, the business ecology perspective is complemented with ideas and propositions from other theoretical areas, such as stakeholder theory, community governance, organizational identity, motivation theory, pricing, and bundling.

    The findings show that the common challenges in commercialising community-driven open source revolve around nine distinct factors that roughly cluster into three domains: the ecosystem, the community, and the firm. In short, the domain of the ecosystem comprises the global operating environment, the pace of change, and the cannibalisation of ideas. The domain of the community comprises the platform policy, platform image, and the voluntary nature of the open source project. And finally, the domain of the firm comprises the blurring boundaries between private and professional lives, the difficulty of estimating costs, and firm dependencies. Based on these insights, a framework for analysing community-based value creation in business ecosystems is proposed. This framework integrates collective innovation, community engagement, and value capture into a unified model of value creation in contexts of firm–community interaction.

    Furthermore, the findings reveal demonstrable effects of reinforcement, complementarity, synergy, and reciprocity in the intertwining of volunteer community engagement and profit-oriented venturing. By showing that this intertwining can be strong in empirical cases where commercial activities are often implicitly assumed to be absent, this thesis provides a more nuanced understanding of firm involvement in the realm of open source.

    Based on the empirical and analytical insights, a number of further theoretical implications are discussed, such as the role of intersubjective trust in relation to the uncertainties that commercial actors face, an alternative way of classifying community types, the metaphor of superorganisms in the context of open source, issues pertaining to the well-being of community participants, and issues in relation to the transitioning of open source developers from a community-based to an entrepreneurial self-identity when commercialising an open source solution. Furthermore, this thesis builds on six sub-studies that make individual contributions of their own.

    In a broad sense, this thesis contributes to the literature streams on the commercialisation of OSS, the business value and strategic aspects of open source, the interrelationships between community forms of organising and entrepreneurial activities, and the nascent research on ecology perspectives on peer-production communities. A variety of opportunities for future research are highlighted.

  • Winzell, Helen
    Linköping University, Department of Culture and Communication, Language and Literature. Linköping University, Faculty of Educational Sciences.
    Lära för skrivundervisning: En studie om skrivdidaktisk kunskap i ämneslärarutbildningen och läraryrket2018Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The teaching of writing is a complex activity. The aim of this thesis is to investigate when and how the knowledge needed for the teaching of writing is developed in teacher education and during the first years of teaching.

    One sub-study focuses writing, writing development and the teaching of writing in teacher education syllabi. The result shows that the objectives with focus on writing and writing development in school are relatively few and that the main emphasis is on the teachers’ work when the students have already finished writing. Furthermore, the expressions used in the syllabi vary in specificity, which might lead to difficulties detecting the teaching of writing as a field of knowledge in the teacher education programme.

    In the second sub-study, one analysis focuses on the way in which prospective and novice teachers of Swedish talked about text, writing, and the teaching of writing. The result shows a development that starts with a focus on details at a local text level and expands into a more comprehensive view with a focus on global text levels. The second analysis concerns subject matter knowledge and pedagogical content knowledge (PCK) for teaching writing. The result shows that the knowledge manifested by the prospective teachers mainly consists of subject matter knowledge, whereas the knowledge manifested by the teachers mainly consists of PCK for teaching writing.

    In the third sub-study, nine novice Swedish teachers were interviewed in September, February and June during their first year in the profession. This study focuses on the transformation of the teachers’ subject matter knowledge into teaching strategies. The result shows that the teachers’ use of teaching strategies changed throughout the year. There is a shift from theory and transmission to practice and discovery. What mainly causes this shift seems to be the teachers’ work together with their students and the possibility to teach the same content or field of knowledge repeatedly.

    The overall analysis thus shows that the PCK for teaching writing is mainly developed in the teaching profession; in other words, after the exam from the teacher education programme.

  • Hagman, Linda
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    How do biogas solutions influence the sustainability of bio-based industrial systems?2018Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Biomass is a valuable and limited resource that should be used efficiently. The potential of replacing fossil-based products with bio-based ones produced in biobased industrial systems is huge. One important aim of increasing the share of biobased products is to improve the sustainability of systems for production and consumption. Therefore, it is important to evaluate what solutions are available to improve the sustainability performance of bio-based industrial systems, and if they also bring negative impacts. The thesis focuses on assessing the role of biogas solutions in developing sustainable bio-based systems. Such assessments are often quite narrow in their scope and focus on quantitative environmental or economic aspects. This thesis aims at also including feasibility related aspects involving the contextual conditions that are assessed more qualitatively. Biogas solutions are identified as a versatile approach to treat organic materials which are generated in large volumes in bio-based industrial systems. The results show that biogas solutions in bio-based industrial systems (i) improve circular flows of energy and nutrients, (ii) are especially viable alternatives when the quality of the by-product streams become poorer, and (iii) may improve the profitability of the bio-based industrial system. To perform better assessments of these systems, it seems valuable to broaden the set of indicators assessed and include feasibility-related indicators, preferably through the involvement of relevant stakeholders as they contribute with different perspectives and can identify aspects that influence the sustainability in different areas. Future studies could benefit from applying those broader assessments on more cases to build on a more generalisable knowledge base.

    List of papers
    1. The role of biogas solutions in sustainable biorefineries
    Open this publication in new window or tab >>The role of biogas solutions in sustainable biorefineries
    2018 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 172, p. 3982-3989Article in journal (Refereed) Published
    Abstract [en]

    Biorefineries strive to maximise product mix and value while contributing to the bioeconomy. Circularityand waste valorisation are some important but often neglected concepts in this context. As such, biogassolutions in biorefineries could be a key technology to improve sustainability. This study has, through aliterature review and investigation into three Swedish case studies, analysed this relationship betweenbiogas solutions and biorefineries by assessing the added value and development potential to whichbiogas solutions may contribute. This analysis across agricultural, forest, and marine sectors indicatesthat biogas solutions contribute with several added values, including through making the biorefinerymore sustainable and competitive. The study also shows that biogas solutions can be an enabler ofbiorefinery development through making the system more resilient and versatile, as well as throughimproving the value of the product portfolio.

    Place, publisher, year, edition, pages
    Elsevier, 2018
    Keywords
    Biorefinery, biogas, bioeconomy, valorisation, anaerobic digestion, waste management, Bioraffinaderi, biogas, bioekonomi, avfallshantering
    National Category
    Other Environmental Engineering
    Identifiers
    urn:nbn:se:liu:diva-143022 (URN)10.1016/j.jclepro.2017.03.180 (DOI)000423002500084 ()2-s2.0-85016415075 (Scopus ID)
    Funder
    Swedish Energy Agency
    Note

    Funding agencies: Biogas Research Center (BRC); Swedish Energy Agency

    Available from: 2017-11-29 Created: 2017-11-29 Last updated: 2018-11-26Bibliographically approved
  • Magnuson, Martin
    et al.
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Greczynski, Grzegorz
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Eriksson, Fredrik
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Hultman, Lars
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Högberg, Hans
    Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, Faculty of Science & Engineering.
    Electronic Structure of ß-Ta Films from X-ray Photoelectron Spectroscopy and First-principles Calculations2019In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 470, p. 607-612Article in journal (Refereed)
    Abstract [en]

    The electronic structure and chemical bonding of ß-Ta synthesized as a thin 001-oriented film (space group P 21m) is investigated by 4f core level and valence band X-ray photoelectron spectroscopy and compared to α-Ta bulk. For the b-phase, the 4f7/2 peak is located at 21.91 eV and with the 4f5/2 at 23.81 eV which is 0.16 eV higher compared to the corresponding 4f peaks of the a-Ta reference. We suggest that this chemical shift originates from higher resistivity and tensile strain in the ß-Ta film. Furthermore, the 5d-5s states at the bottom of the valence band are shifted by 0.75 eV towards higher binding energy in ß-Ta compared to α-Ta. This is a consequence of the lower number of nearest neighbors with four in ß-Ta compared to eight in the α-Ta phase. The difference in the electronic structures, spectral line shapes of the valence band and the energy positions of the Ta 4f, 5p core-levels of b-Ta versus a-Ta are discussed in relation to calculated states of ß-Ta and α-Ta. In particular, the lower number of states at the Fermi level of ß-Ta (0.557 states/eV/atom) versus α-Ta (1.032 states/eV/atom) that according to Mott’s law should decrease the conductivity in metals and affect the stability by charge redistribution in the valence band. This is experimentally supported from resistivity measurements of the film yielding a value of ~170 µW cm in comparison to α-Ta bulk with a reported value of ~13.1 µW cm.

  • Kilander, Helena
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences.
    Contraceptive counselling in abortion care2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Introduction: Improving women’s knowledge about contraception, and their access to contraceptive methods, is central in order to strengthen their sexual and reproductive rights at the time of an abortion. Contraceptive counselling aims to support women’s reproductive control and prevent unintended pregnancies (UPs). It is unclear, however, how to provide contraceptive counselling and how to organise services at the time of an abortion, in order to achieve this.

    Aim: The overall aim was to study women’s choices and use of contraceptive methods post-abortion. The research also aimed to describe contraceptive counselling in the context of an abortion from women’s and health professionals’ (HP’s) perspectives. Initial studies informed subsequent improvement efforts, also evaluated in the thesis, regarding contraceptive counselling and services at the time of an abortion.

    Design and Methods: The studies in this thesis involve both quantitative (studies I and IV) and qualitative (studies II–IV) methods, performed at six departments in southeast Sweden. Study I had a quantitative and longitudinal design. The medical records of women (n=987) were reviewed regarding women’s choice of contraceptive method at the index abortion and the odds of repeat abortion within three to four years. Studies II and III were qualitative interview studies, in which 13 women (study II) and 21 healthcare professionals (HPs) (study III) described their experiences of contraceptive counselling at the time of an abortion. The interviews were analysed using interpretive phenomenology (study II) and conventional content analysis (study III). Study IV was a case study regarding a qualitative improvement collaborative (QIC), designed to improve contraceptive counselling and services. Three multi-professional teams involved in abortion care participated in the QIC and two women provided user-experience input. Both qualitative and quantitative data were collected and analysed.

    Results: The findings of the thesis are organised into three themes: I) Women and HPs described contraceptive counselling at the time of an abortion as an often - complex meeting. There was scepticism about contraceptive methods and limited receptivity to information among women. Respectful counselling facilitated women’s choice of contraceptive method even if they were sceptical and found the situation emotionally charged. II) Women’s choices, need for guidance and access to the contraceptive methods was described in the second theme. Choice of oral contraceptives (OC) dominated. Overall, 25% of the women experienced repeat abortion during followup. Women who chose long-acting reversible contraception (LARC) experienced fewer repeat abortions compared to women who chose OC. Both women and HPs reported barriers in access to LARC post-abortion. III) In a Quality Improvement Collaborative (QIC), two volunteering women provided user-experience input. HPs participating in this QIC reported strengthened skills in counselling and enhanced ability to evaluate their performance. Despite the team’s prediction that they would reach the QIC goal that ≥50% of women would start LARC within 30 days post-abortion, and the fact that a majority of the women in QIC units chose LARC, none of the teams managed to reach the goal, primarily due to insufficient capacity for timely initiation of LARC.

    Conclusion: The findings suggest that women need respectful counselling and guidance at the time of an abortion. Access to a range of contraceptive methods, particularly LARC, is important to prevent repeat UPs. There is room for further improvement in offering coordinated and timely access for women who choose LARC, and to evaluate counselling, in the present settings.

    List of papers
    1. Likelihood of repeat abortion in a Swedish cohort according to the choice of post-abortion contraception: a longitudinal study
    Open this publication in new window or tab >>Likelihood of repeat abortion in a Swedish cohort according to the choice of post-abortion contraception: a longitudinal study
    Show others...
    2016 (English)In: Acta Obstetricia et Gynecologica Scandinavica, ISSN 0001-6349, E-ISSN 1600-0412, Vol. 95, no 5, p. 565-571Article in journal (Refereed) Published
    Abstract [en]

    IntroductionDespite high access to contraceptive services, 42% of the women who seek an abortion in Sweden have a history of previous abortion(s). The reasons for this high repeat abortion rate remain obscure. The objective of this study was to study the choice of contraceptive method after abortion and related odds of repeat abortions within 3-4 years. Material and methodsThis is a retrospective cohort study based on a medical record review at three hospitals in Sweden. We included 987 women who had an abortion during 2009. We reviewed medical records from the date of the index abortion until the end of 2012 to establish the choice of contraception following the index abortion and the occurrence of repeat abortions. We calculated odds ratios (OR) with 95% CI. ResultsWhile 46% of the women chose oral contraceptives, 34% chose long-acting reversible contraceptives (LARC). LARC was chosen more commonly by women with a previous pregnancy, childbirth and/or abortion. During the follow-up period, 24% of the study population requested one or more repeat abortion(s). Choosing LARC at the time of the index abortion was associated with fewer repeat abortions compared with choosing oral contraceptives (13% vs. 26%, OR 0.36; 95% CI 0.24-0.52). Subdermal implant was as effective as intrauterine device in preventing repeat abortions beyond 3 years. ConclusionsChoosing LARC was associated with fewer repeat abortions over more than 3 years of follow up.

    Place, publisher, year, edition, pages
    WILEY-BLACKWELL, 2016
    Keywords
    Long-acting reversible contraception; post-abortion contraception; repeat abortion; subdermal implant; termination of pregnancy
    National Category
    Clinical Medicine
    Identifiers
    urn:nbn:se:liu:diva-128136 (URN)10.1111/aogs.12874 (DOI)000374349400012 ()26871269 (PubMedID)
    Note

    Funding Agencies|Futurum - the academy for healthcare; Jonkoping County Council; Medical Research Council of Southeast Sweden (FORSS)

    Available from: 2016-05-19 Created: 2016-05-19 Last updated: 2018-11-26
    2. Womens experiences of contraceptive counselling in the context of an abortion - An interview study
    Open this publication in new window or tab >>Womens experiences of contraceptive counselling in the context of an abortion - An interview study
    Show others...
    2018 (English)In: Sexual & Reproductive HealthCare, ISSN 1877-5756, E-ISSN 1877-5764, Vol. 17, p. 103-107Article in journal (Refereed) Published
    Abstract [en]

    Objective: To identify and understand womens lived experiences of contraceptive counselling given at the same time as abortion counselling. Methods: We interviewed 13 women aged 20-39 who had experienced an abortion and the related counselling. The women were recruited from five hospitals in Sweden. Interviews were analysed using an interpretative phenomenological approach. Results: We identified two themes: need for respectful counselling and needs for guidance and access to contraceptives. The essence "Being in a state of limbo and feeling sceptical" was coalesced from the themes. The women described a state of limbo, as being caught in an unwanted and emotionally charged situation. They reported that respectful counselling and meeting a skilled health professional helped to dispel their scepticism and influenced their plans for contraceptive use post abortion. Furthermore, women who wanted an intrauterine device described difficulties in access post abortion. Conclusion: The women seem to have a limited receptivity to contraceptive counselling when they have an unwanted pregnancy and are sceptical about contraceptives. Women, who experience respect in the counselling, report being helped in contraceptive decision-making. To receive respectful counselling and to have good access to intrauterine devices emerged as central needs among women at the time of an abortion.

    Place, publisher, year, edition, pages
    ELSEVIER IRELAND LTD, 2018
    Keywords
    Accessibility; Contraception; Family planning; Intrauterine device; Pregnancy termination; Respect
    National Category
    Obstetrics, Gynecology and Reproductive Medicine
    Identifiers
    urn:nbn:se:liu:diva-152074 (URN)10.1016/j.srhc.2018.07.007 (DOI)000445980700018 ()30193713 (PubMedID)
    Note

    Funding Agencies|Futurum - the academy for healthcare in the Jonkoping County Council; Medical Research Council of Southeast Sweden (FORSS)

    Available from: 2018-10-24 Created: 2018-10-24 Last updated: 2018-11-26
    3. Contraceptive counselling of women seeking abortion - a qualitative interview study of health professionals experiences
    Open this publication in new window or tab >>Contraceptive counselling of women seeking abortion - a qualitative interview study of health professionals experiences
    Show others...
    2017 (English)In: European journal of contraception & reproductive health care, ISSN 1362-5187, E-ISSN 1473-0782, Vol. 22, no 1Article in journal (Refereed) Published
    Abstract [en]

    Objectives: A substantial proportion of women who undergo an abortion continue afterwards without switching to more effective contraceptive use. Many subsequently have repeat unintended pregnancies. This study, therefore, aimed to identify and describe health professionalg experiences of providing contraceptive counselling to women seeking an abortion. Methods: We interviewed 21 health professionals (HPs), involved in contraceptive counselling of women seeking abortion at three differently sized hospitals in Sweden. The interviews were recorded and transcribed verbatim and analysed using conventional qualitative content analysis. Results: Three clusters were identified: Complex counselling, Elements of counselling and Finding a method. HPs often experienced consultations including contraceptive counselling at the time of an abortion as complex, covering both pregnancy termination and contraceptive counselling. Women with vulnerabilities placed even greater demands on the HPs providing counselling. The HPs varied in their approaches when providing contraceptive counselling but also in their knowledge about certain contraception methods. HPs described challenges in finding out if women had found an effective method and in the practicalities of arranging intrauterine device (IUD) insertion post-abortion, when a woman asked for this method. Conclusions: HPs found it challenging to provide contraceptive counselling at the time of an abortion and to arrange access to IUDs post-abortion. There is a need to improve their counselling, their skills and their knowledge to prevent repeat unintended pregnancies.

    Place, publisher, year, edition, pages
    TAYLOR & FRANCIS LTD, 2017
    Keywords
    Contraception; decision-making; family planning; pregnancy termination; prevention; providers perspective; repeat abortion
    National Category
    Obstetrics, Gynecology and Reproductive Medicine
    Identifiers
    urn:nbn:se:liu:diva-136329 (URN)10.1080/13625187.2016.1238892 (DOI)000394925200002 ()27689407 (PubMedID)
    Note

    Funding Agencies|Futurum - the academy for healthcare, in the Jonkoping County Council [306501]; Medical Research Council of Southeast Sweden (FORSS) [467241]

    Available from: 2017-04-10 Created: 2017-04-10 Last updated: 2018-11-26
  • Falklöf, Lennart (Editor)
    Linköping University, University Services.
    LiU Magasin2018Other (Other academic)
  • Bergdahl, Elisabeth
    et al.
    Faculty of Nursing and Health Sciences, Nord University, Bodø, Norway.
    Ternestedt, Britt-Marie
    Department of Health Care Science/ Palliative Research Centre, Ersta Sköndal Bräcke University College, Stockholm, Sweden.
    Berterö, Carina
    Linköping University, Department of Medical and Health Sciences, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences.
    Andershed, Birgitta
    Department of Health Care Science/ Palliative Research Centre, Ersta Sköndal Bräcke University College, Stockholm, Sweden; Faculty of Health, Care and Nursing, Norwegian University of Science and Technology, Gjøvik, Norway .
    The theory of a co-creative process in advanced palliative home care nursing encounters: A qualitative deductive approach over time2018In: Nursing Open, E-ISSN 2054-1058Article in journal (Refereed)
    Abstract [en]

    Aims and objectives

    The aim of this study was to test the theoretical conceptualization of the co‐creative process in home care nursing encounters over time.

    Method and design

    This was a multiple case study with a deductive analysis of qualitative data over time, using interviews and observations collected from three cases.

    Results

    The co‐creative process was complex and contained main, sub‐ and micro‐processes. Time was important and valuable, giving the patient and relatives space to adjust the process to their own pace. Some processes were worked on more intensively in accordance with the patients’ and relatives’ needs, and these are considered the main‐process. The further developed theory of the co‐creative process and its main, sub‐ and microprocesses can be understood as a concretization of how good nursing care can be performed within caring relationships in the context of advanced palliative home care.

  • Andersson, Per
    et al.
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Educational Sciences.
    Köpsén, Susanne
    Linköping University, Department of Behavioural Sciences and Learning, Education and Adult Learning. Linköping University, Faculty of Arts and Sciences.
    Lärares utveckling av ämneskunskap: En studie av yrkeslärares kompetensutveckling inom yrkesämnen2018In: Resultatdialog 2018, Stockholm: Vetenskapsrådet , 2018, p. 20-22Chapter in book (Other academic)
    Abstract [sv]

    För att hålla sig uppdaterade och utveckla sitt ämneskunnande behöver yrkeslärare inom gymnasieskola och vuxenutbildning möjligheter till kompetensutveckling i nära kontakt med sina olika yrken och branscher. För dessa lärare är kompetensutveckling extra viktigt, eftersom kunskapsutvecklingen i många yrken går så snabbt. Även mer informellt nätverkande har stor betydelse, visar denna studie.

  • Lundberg, Martin
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Science & Engineering.
    Using game design elements in a mobile sign language learning application to increase user enjoyment and performance2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The use of and research on gamification has increased substantially since 2010. Most of the research on gamification has been done within education, specifically higher education. There is a dearth of research on gamification for children with disabilities. There has also been much research on the characteristics of successful instructional and educational games. In this thesis, theory on both gamification and the characteristics of successful instructional and educational games were used to design and implement several game design elements in a mobile sign language learning application to make it more enjoyable for the users. The game design elelemnts implemented were points, appropriate challenge, proximal goals, randomness and control. The target group of the application is children with disabilities making the thesis unique compared to any previous research. A rigorous gamification methodology was followed and a meeting with experts on children with special educational needs was held to get a good understanding of the target group. The development was done iteratively with two-week long iterations. After each iteration a presentation was held for the intern company and feedback was given. A school was willing to participate in an evaluation session and at the end of the thesis and the session was held with 22 children with learning disabilities. Both the original application and the application with the added gamification elements were evaluated and the results were compared. Results found that the children using the new version of the application had less throughput and found learning sign language to be more enjoyable and easier compared to the children using the original version of the application. The results are questionable, however, due tolimitations of the evaluation. Some of the issues were that the ages of the children differed between the groups, the severity of the disabilities was not considered, and the participants only got to use one version of the application for fifteen minutes.

  • Miandji, Ehsan
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Sparse representation of visual data for compression and compressed sensing2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The ongoing advances in computational photography have introduced a range of new imaging techniques for capturing multidimensional visual data such as light fields, BRDFs, BTFs, and more. A key challenge inherent to such imaging techniques is the large amount of high dimensional visual data that is produced, often requiring GBs, or even TBs, of storage. Moreover, the utilization of these datasets in real time applications poses many difficulties due to the large memory footprint. Furthermore, the acquisition of large-scale visual data is very challenging and expensive in most cases. This thesis makes several contributions with regards to acquisition, compression, and real time rendering of high dimensional visual data in computer graphics and imaging applications.

    Contributions of this thesis reside on the strong foundation of sparse representations. Numerous applications are presented that utilize sparse representations for compression and compressed sensing of visual data. Specifically, we present a single sensor light field camera design, a compressive rendering method, a real time precomputed photorealistic rendering technique, light field (video) compression and real time rendering, compressive BRDF capture, and more. Another key contribution of this thesis is a general framework for compression and compressed sensing of visual data, regardless of the dimensionality. As a result, any type of discrete visual data with arbitrary dimensionality can be captured, compressed, and rendered in real time.

    This thesis makes two theoretical contributions. In particular, uniqueness conditions for recovering a sparse signal under an ensemble of multidimensional dictionaries is presented. The theoretical results discussed here are useful for designing efficient capturing devices for multidimensional visual data. Moreover, we derive the probability of successful recovery of a noisy sparse signal using OMP, one of the most widely used algorithms for solving compressed sensing problems.

    List of papers
    1. OMP-based DOA estimation performance analysis
    Open this publication in new window or tab >>OMP-based DOA estimation performance analysis
    2018 (English)In: Digital signal processing (Print), ISSN 1051-2004, E-ISSN 1095-4333, Vol. 79, p. 57-65Article in journal (Refereed) Published
    Abstract [en]

    In this paper, we present a new performance guarantee for Orthogonal Matching Pursuit (OMP) in the context of the Direction Of Arrival (DOA) estimation problem. For the first time, the effect of parameters such as sensor array configuration, as well as signal to noise ratio and dynamic range of the sources is thoroughly analyzed. In particular, we formulate a lower bound for the probability of detection and an upper bound for the estimation error. The proposed performance guarantee is further developed to include the estimation error as a user-defined parameter for the probability of detection. Numerical results show acceptable correlation between theoretical and empirical simulations. (C) 2018 Elsevier Inc. All rights reserved.

    Place, publisher, year, edition, pages
    ACADEMIC PRESS INC ELSEVIER SCIENCE, 2018
    Keywords
    Direction of arrival; Orthogonal Matching Pursuit (OMP); Mutual coherence; Array configuration
    National Category
    Signal Processing
    Identifiers
    urn:nbn:se:liu:diva-149841 (URN)10.1016/j.dsp.2018.04.006 (DOI)000437386200006 ()
    Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-11-23
    2. On Probability of Support Recovery for Orthogonal Matching Pursuit Using Mutual Coherence
    Open this publication in new window or tab >>On Probability of Support Recovery for Orthogonal Matching Pursuit Using Mutual Coherence
    2017 (English)In: IEEE Signal Processing Letters, ISSN 1070-9908, E-ISSN 1558-2361, Vol. 24, no 11, p. 1646-1650Article in journal (Refereed) Published
    Abstract [en]

    In this paper we present a new coherence-based performance guarantee for the Orthogonal Matching Pursuit (OMP) algorithm. A lower bound for the probability of correctly identifying the support of a sparse signal with additive white Gaussian noise is derived. Compared to previous work, the new bound takes into account the signal parameters such as dynamic range, noise variance, and sparsity. Numerical simulations show significant improvements over previous work and a closer match to empirically obtained results of the OMP algorithm.

    Place, publisher, year, edition, pages
    IEEE Signal Processing Society, 2017
    Keywords
    Compressed Sensing (CS), Sparse Recovery, Orthogonal Matching Pursuit (OMP), Mutual Coherence
    National Category
    Signal Processing
    Identifiers
    urn:nbn:se:liu:diva-141613 (URN)10.1109/LSP.2017.2753939 (DOI)000412501600001 ()
    Available from: 2017-10-03 Created: 2017-10-03 Last updated: 2018-11-23Bibliographically approved
    3. ON NONLOCAL IMAGE COMPLETION USING AN ENSEMBLE OF DICTIONARIES
    Open this publication in new window or tab >>ON NONLOCAL IMAGE COMPLETION USING AN ENSEMBLE OF DICTIONARIES
    2016 (English)In: 2016 IEEE INTERNATIONAL CONFERENCE ON IMAGE PROCESSING (ICIP), IEEE , 2016, p. 2519-2523Conference paper, Published paper (Refereed)
    Abstract [en]

    In this paper we consider the problem of nonlocal image completion from random measurements and using an ensemble of dictionaries. Utilizing recent advances in the field of compressed sensing, we derive conditions under which one can uniquely recover an incomplete image with overwhelming probability. The theoretical results are complemented by numerical simulations using various ensembles of analytical and training-based dictionaries.

    Place, publisher, year, edition, pages
    IEEE, 2016
    Series
    IEEE International Conference on Image Processing ICIP, ISSN 1522-4880
    Keywords
    compressed sensing; image completion; nonlocal; inverse problems; uniqueness conditions
    National Category
    Computer Vision and Robotics (Autonomous Systems)
    Identifiers
    urn:nbn:se:liu:diva-134107 (URN)10.1109/ICIP.2016.7532813 (DOI)000390782002114 ()978-1-4673-9961-6 (ISBN)
    Conference
    23rd IEEE International Conference on Image Processing (ICIP)
    Available from: 2017-01-22 Created: 2017-01-22 Last updated: 2018-11-23
    4. Compressive Image Reconstruction in Reduced Union of Subspaces
    Open this publication in new window or tab >>Compressive Image Reconstruction in Reduced Union of Subspaces
    2015 (English)In: Computer Graphics Forum, ISSN 1467-8659, Vol. 34, no 2, p. 33-44Article in journal (Refereed) Published
    Abstract [en]

    We present a new compressed sensing framework for reconstruction of incomplete and possibly noisy images and their higher dimensional variants, e.g. animations and light-fields. The algorithm relies on a learning-based basis representation. We train an ensemble of intrinsically two-dimensional (2D) dictionaries that operate locally on a set of 2D patches extracted from the input data. We show that one can convert the problem of 2D sparse signal recovery to an equivalent 1D form, enabling us to utilize a large family of sparse solvers. The proposed framework represents the input signals in a reduced union of subspaces model, while allowing sparsity in each subspace. Such a model leads to a much more sparse representation than widely used methods such as K-SVD. To evaluate our method, we apply it to three different scenarios where the signal dimensionality varies from 2D (images) to 3D (animations) and 4D (light-fields). We show that our method outperforms state-of-the-art algorithms in computer graphics and image processing literature.

    Place, publisher, year, edition, pages
    John Wiley & Sons Ltd, 2015
    Keywords
    Image reconstruction, compressed sensing, light field imaging
    National Category
    Signal Processing
    Identifiers
    urn:nbn:se:liu:diva-119639 (URN)10.1111/cgf.12539 (DOI)000358326600008 ()
    Conference
    Eurographics 2015
    Projects
    VPS
    Funder
    Swedish Foundation for Strategic Research , IIS11-0081
    Available from: 2015-06-23 Created: 2015-06-23 Last updated: 2018-11-23Bibliographically approved
    5. Learning Based Compression of Surface Light Fields for Real-time Rendering of Global Illumination Scenes
    Open this publication in new window or tab >>Learning Based Compression of Surface Light Fields for Real-time Rendering of Global Illumination Scenes
    2013 (English)In: Proceedings of ACM SIGGRAPH ASIA 2013, ACM Press, 2013Conference paper, Published paper (Refereed)
    Abstract [en]

    We present an algorithm for compression and real-time rendering of surface light fields (SLF) encoding the visual appearance of objects in static scenes with high frequency variations. We apply a non-local clustering in order to exploit spatial coherence in the SLFdata. To efficiently encode the data in each cluster, we introducea learning based approach, Clustered Exemplar Orthogonal Bases(CEOB), which trains a compact dictionary of orthogonal basispairs, enabling efficient sparse projection of the SLF data. In ad-dition, we discuss the application of the traditional Clustered Principal Component Analysis (CPCA) on SLF data, and show that inmost cases, CEOB outperforms CPCA, K-SVD and spherical harmonics in terms of memory footprint, rendering performance andreconstruction quality. Our method enables efficient reconstructionand real-time rendering of scenes with complex materials and lightsources, not possible to render in real-time using previous methods.

    Place, publisher, year, edition, pages
    ACM Press, 2013
    Keywords
    computer graphics, global illumination, real-time, machine learning
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-99433 (URN)10.1145/2542355.2542385 (DOI)978-1-4503-2629-2 (ISBN)
    Conference
    SIGGRAPH Asia, 19-22 November 2013, Hong Kong
    Projects
    VPS
    Funder
    Swedish Foundation for Strategic Research , IIS11-0081Swedish Research Council
    Available from: 2013-10-17 Created: 2013-10-17 Last updated: 2018-11-23Bibliographically approved
  • Stoewer, Kirsten
    Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    English Hemspråk: Language in Interaction in English Mother Tongue Instruction in Sweden2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The thesis investigates teacher-student interaction in English mother tongue instruction (MTI), offered within mainstream education to English heritage language students in Sweden. In particular, it examines the type of language work that was in focus during the lessons and the ways teacher and students engaged in the language work in situ. The study is based on approximately thirty hours of video-recordings of three groups of students who attended the lessons with the same teacher, at two Swedish schools. The students in the groups ranged from age six to fifteen. Using an ethnomethodological conversation analytic framework, the thesis analyzes the situated ways that teacher and students co-constructed what aspects of language were topicalized and how this was accomplished.

    The empirical studies shed new light on the dynamic connections between pedagogy and the emergent practices through which MTI is achieved. From the analysis, vocabulary emerged as a prominent feature of the lessons, where the teaching of form, meaning and use of lexical items variously grew out of both planned and unplanned activities. Hence, the empirical studies explore different aspects of vocabulary work. The studies also discuss the role of the local availability of both English and Swedish in shaping the types of practices that took place at the MT lessons.

    List of papers
    1. What is it in Swedish?: Translation requests as a resource for vocabulary explanation in English mother tongue instruction
    Open this publication in new window or tab >>What is it in Swedish?: Translation requests as a resource for vocabulary explanation in English mother tongue instruction
    2018 (English)In: Conversation Analysis and Language Alternation: Capturing transitions in the classroom / [ed] Anna Filipi and Numa Markee, John Benjamins Publishing Company, 2018, p. 83-106Chapter in book (Refereed)
    Abstract [en]

    The present chapter investigates teacher-initiated translation requests as spontaneous vocabulary teaching during English mother tongue instruction in Sweden. The collection-based analysis draws on a corpus of 30 hours (11 weeks) of video-recordings of compulsory school-age students. The analysis shows how the teacher routinely draws on the local availability of two shared languages to accomplish a variety of actions: to check students’ comprehension of topicalised vocabulary; to engage the entire cohort; to perform medium repair; and to prompt student production of the target language. The findings may be of relevance for numerous types of bi- and multilingual settings, where language alternation serves to augment the teaching and learning of languages as well as other subject matter.

    Place, publisher, year, edition, pages
    John Benjamins Publishing Company, 2018
    Series
    Pragmatics & Beyond New Series, ISSN 0922-842X ; 295
    Keywords
    Language alternation, mother tongue instruction, translation requests, English as a heritage language, conversation analysis, vocabulary teaching, transitions
    National Category
    Learning
    Identifiers
    urn:nbn:se:liu:diva-152855 (URN)10.1075/pbns.295.05sto (DOI)9789027201409 (ISBN)9789027263575 (ISBN)
    Available from: 2018-11-23 Created: 2018-11-23 Last updated: 2018-11-23Bibliographically approved
    2. Impromptu vocabulary work in English mother tongue instruction
    Open this publication in new window or tab >>Impromptu vocabulary work in English mother tongue instruction
    2018 (English)In: Classroom Discourse, ISSN 1946-3014, E-ISSN 1946-3022, p. 1-28Article in journal (Refereed) Published
    Abstract [en]

    This paper examines how unplanned vocabulary work arises out of students’ talk. Furthermore, we show how the teacher and students jointly contribute towards the ensuing teaching trajectories, whereby the vocabulary items are turned into ‘teachables’, i.e. interactionally emergent objects of explicit teaching. In doing so, we also explore what aspects of vocabulary knowledge are targeted.

    This collection-based study uses conversation analysis to examine video recordings of fairly advanced heritage speakers of English from English mother tongue instruction classes in Sweden. The analyses reveal a variety of ways in which the teaching trajectories arise: the teacher’s substitution requests for a more appropriate word; a student’s naming and word-confirmation requests; the teacher’s or a student’s translation and meaning requests. A third of these requests were initiated by a student. The trajectories then developed collaboratively and were tailored to the local context to address issues of meaning, form and use. Establishing the meaning of a word frequently involved (and could combine) requesting/providing, e.g., definitions and translations. Form could be targeted by carefully enunciating topicalised lexis or writing it on the board, and vocabulary use was typically elaborated by contextualising words and sometimes by exploring collocations.

    Place, publisher, year, edition, pages
    Routledge, 2018
    National Category
    Learning
    Identifiers
    urn:nbn:se:liu:diva-152856 (URN)10.1080/19463014.2018.1516152 (DOI)
    Available from: 2018-11-23 Created: 2018-11-23 Last updated: 2018-11-23Bibliographically approved
  • Ertzgaard, Per
    Linköping University, Department of Medical and Health Sciences, Division of Community Medicine. Linköping University, Faculty of Medicine and Health Sciences. Region Östergötland, Anaesthetics, Operations and Specialty Surgery Center, Department of Rehabilitation Medicine.
    Studies on Spasticity from an Interventional Perspective2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis focuses on interventional aspects of spasticity, but has a very holistic approach, grounded in the specialty of Rehabilitation medicine. This means capturing the effects of spasticity, on such a complex biological system as the human being, living in a psychosocial context affecting the situation. When evaluating spasticity there are a number of levels of evidence. The first of course, understanding what we mean with spasticity, where there unfortunately is no consensus. The second level is to study if our treatments affect spasticity in a positive direction. The third is to grasp if a decrease in spasticity improve or normalize patient’s movement patterns. The fourth level investigates if improvement in movement patterns improve patient’s ability to perform activities; and the fifth level, comprising whether this intervention improves life satisfaction. Finally, on a societal level, we wish to investigate whether the improvement in life satisfaction or health related quality of life would motivate society to fund the intervention.

    Paper I on Goal Attainment Scaling pointed out necessary aspects to consider when using this instrument. This relates, among other things, to the need of learning (“the art of”) goal setting and deciding the purpose of the measurements. Research and clinical use puts different demands on the instrument, for the latter time-efficiency and simplicity to use being most important. For research, it is important to be able to register deterioration, and this can be achieved using the 6-step version.

    In paper II, concerning validation of the portable motion system, we showed this system to be valid for short-term measurements and that the use of Exposure Variation Analysis (EVA) seems to be a valuable tool for graphically elucidating different movements. The equipment needs further development in handling long-term measurements (which is effectuated), and norms for normal movements in different activities has to be produced. The discriminative value of EVA needs confirmation in coming studies. For the future, there is the intriguing possibility of long-term measurements in patients’ every-day life, thereby getting objective measures on how our patients use their abilities, thus capturing the difference between what you can do and what you actually do.

    The results from paper III demonstrated a large inequality in Sweden regarding the accessibility of BoNT-A treatment for spasticity. We could also show that treatment with BoNT-A is sound from a health-economic perspective, accounting for the uncertainty of data via the sensitivity analysis. For the future, we need to explore if this inequality also exists for other modes of spasticity treatments, e.g. multidisciplinary spasticity treatment and ITB pumps, and in other countries.

    In paper IV evaluating multifocal TES, the results could not confirm efficacy with the treatment according to the protocol of the manufacturer. The results have to be interpreted with care, as low compliance and frequent adverse events made deduction not captured in the RCT study. Further studies are needed in a number of areas, e.g. what is the optimal stimulation frequency, what patients can gain from the treatment and how should adjunct treatment be organized.

    In this thesis, I have had the privilege to explore different methods of evaluating spasticity interventions from a multimodal perspective as a starting point in an effort to understand more of this intriguing phenomenon. Some of the research questions above are already in the “pipeline” for coming studies; others are to be planned by our research group and others.

    List of papers
    1. PRACTICAL CONSIDERATIONS FOR GOAL ATTAINMENT SCALING DURING REHABILITATION FOLLOWING ACQUIRED BRAIN INJURY
    Open this publication in new window or tab >>PRACTICAL CONSIDERATIONS FOR GOAL ATTAINMENT SCALING DURING REHABILITATION FOLLOWING ACQUIRED BRAIN INJURY
    2011 (English)In: JOURNAL OF REHABILITATION MEDICINE, ISSN 1650-1977, Vol. 43, no 1, p. 8-14Article in journal (Refereed) Published
    Abstract [en]

    Objective: Goal attainment scaling represents a unique approach to identifying and quantifying individualized, meaningful treatment outcomes, and its use in the rehabilitation medicine setting is increasing. The aim of this paper is to discuss the available literature for goal attainment scaling in patients with acquired brain injury, in terms of its advantages, disadvantages and practical application, including examples of goal setting and scaling.

    Place, publisher, year, edition, pages
    Foundation for Rehabilitation Information, 2011
    Keywords
    acquired brain injury, goal attainment scaling, rehabilitation
    National Category
    Medical and Health Sciences
    Identifiers
    urn:nbn:se:liu:diva-66870 (URN)10.2340/16501977-0664 (DOI)000288105200002 ()
    Available from: 2011-03-22 Created: 2011-03-21 Last updated: 2018-11-22
    2. A new way of assessing arm function in activity using kinematic Exposure Variation Analysis and portable inertial sensors - A validity study
    Open this publication in new window or tab >>A new way of assessing arm function in activity using kinematic Exposure Variation Analysis and portable inertial sensors - A validity study
    2016 (English)In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 21, p. 241-249Article in journal (Refereed) Published
    Abstract [en]

    Portable motion systems based on inertial motion sensors are promising methods, with the advantage compared to optoelectronic cameras of not being confined to a laboratory setting. A challenge is to develop relevant outcome measures for clinical use. The aim of this study was to characterize elbow and shoulder motion during functional tasks, using portable motion sensors and a modified Exposure Variation Analysis (EVA) and evaluate system accuracy with optoelectronic cameras. Ten healthy volunteers and one participant with sequel after stroke performed standardised functional arm tasks. Motion was registered simultaneously with a custom developed motion sensor system, including gyroscopes and accelerometers, and an optoelectronic camera system. The EVA was applied on elbow and shoulder joints, and angular and angular velocity EVA plots was calculated. The EVA showed characteristic patterns for each arm task in the healthy controls and a distinct difference between the affected and unaffected arm in the participant with sequel after stroke. The accuracy of the portable system was high with a systematic error ranging between -1.2 degrees and 2.0 degrees. The error was direction specific due to a drift component along the gravity vector. Portable motion sensor systems have high potential as clinical tools for evaluation of arm function. EVA effectively illustrates joint angle and joint angle velocity patterns that may capture deficiencies in arm function and movement quality. Next step will be to manage system drift by including magnetometers, to further develop clinically relevant outcome variables and apply this for relevant patient groups. (C) 2015 Elsevier Ltd. All rights reserved.

    Place, publisher, year, edition, pages
    CHURCHILL LIVINGSTONE, 2016
    Keywords
    Upper extremity motion analysis; Portable motion sensors; Exposure Variation Analysis; Validity
    National Category
    Basic Medicine
    Identifiers
    urn:nbn:se:liu:diva-127585 (URN)10.1016/j.math.2015.09.004 (DOI)000373615100033 ()26456185 (PubMedID)
    Available from: 2016-05-03 Created: 2016-05-03 Last updated: 2018-11-22
    3. Regional disparities in botulinum toxin A (BoNT-A) therapy for spasticity in Sweden: budgetary consequences of closing the estimated treatment gap
    Open this publication in new window or tab >>Regional disparities in botulinum toxin A (BoNT-A) therapy for spasticity in Sweden: budgetary consequences of closing the estimated treatment gap
    2017 (English)In: Acta Neurologica Scandinavica, ISSN 0001-6314, E-ISSN 1600-0404, Vol. 135, no 3, p. 366-372Article in journal (Refereed) Published
    Abstract [en]

    Objectives: As no national treatment guidelines for spasticity have been issued in Sweden, different regional treatment practices may potentially occur. This study examines botulinum toxin A (BoNT-A) treatment for spasticity on a regional level in Sweden and presents budgetary consequences of closing the estimated treatment gap. Materials and Methods: Prevalence of spasticity in Sweden was estimated from published data. Regional sales data for BoNT-A were acquired from IMS Health. A set proportion of hospital BoNT-A use was assumed to represent treatment of spasticity. Total intervention cost of BoNT-A treatment was gathered from healthcare regional tariffs, while costs associated with spasticity were derived from publications on multiple sclerosis and stroke. Results: Results show that the regional variation in treatment of spasticity with BoNT-A is large, with approximately every fourth patient being treated in Southern healthcare region compared to every tenth in the Stockholm-Gotland or Western healthcare regions. The incremental cost of filling the reported treatment gap was also assessed and was estimated at around 9.4 million EUR. However, for the incremental cost to be offset by savings in spasticity-related costs, only a small proportion of treatment responders (defined as patients transitioning to a lower severity grade of spasticity) was required (12%). Conclusions: The study revealed apparent regional disparities of BoNT-A treatment for spasticity in Sweden. The results further suggest that the incremental cost of eliminating the treatment gap has a high probability of being offset by savings in direct costs, even at a low proportion of the patients reaching clinical improvement.

    Place, publisher, year, edition, pages
    WILEY, 2017
    Keywords
    botulinum toxins; costs and cost analysis; muscle spasticity; regional variation
    National Category
    Neurology
    Identifiers
    urn:nbn:se:liu:diva-136626 (URN)10.1111/ane.12610 (DOI)000397285600014 ()27220381 (PubMedID)
    Note

    Funding Agencies|University of Linkoping

    Available from: 2017-04-21 Created: 2017-04-21 Last updated: 2018-11-22
    4. Evaluation of a self-administered transcutaneous electrical stimulation concept for the treatment of spasticity: a randomized placebo-controlled trial
    Open this publication in new window or tab >>Evaluation of a self-administered transcutaneous electrical stimulation concept for the treatment of spasticity: a randomized placebo-controlled trial
    Show others...
    2018 (English)In: European Journal of Physical and Rehabilitation Medicine, ISSN 1973-9087, E-ISSN 1973-9095, Vol. 54, no 4, p. 507-517Article in journal (Refereed) Published
    Abstract [en]

    BACKGROUND: Spasticity is a common consequence of injury to the central nervous system negatively affecting patients everyday activities. Treatment mainly consists of training and different drugs, often with side effects. There is a need for treatment options that can be performed by the patient in their home environment. AIM: The objective of this study was to assess the effectiveness of an assistive technology (AT), Mono, a garment with integrated electrodes for multifocal transcutaneous electrical stimulation intended for self-treatment of spasticity, in study participants with spasticity due to stroke or CP. DESIGN: The study was a randomized, controlled, double-blind study with a cross-over design. SETTING: Participants were recruited from two rehabilitation clinics. Treatments were performed in participants homes and all follow-ups were performed in the two rehabilitation clinics. POPULATION: Thirty-one participants were included in the study and 27 completed the study. Four participants discontinued the study. Two declined participation before baseline and two withdrew due to problems handling the garment. METHODS: Participants used the AT with and without electrical stimulation (active/non-active period) for six weeks each. followed by six weeks without treatment. Goal Attainment Scaling (GAS), change in mobility, arm-hand ability, spasticity and pain were measured at baseline and after 6, 12 and 18 weeks. RESULTS: Fifteen of the 27 participants fulfilled the treatment protocol in terms of recommended use. Deviations were frequent. No statistically significant differences in outcome were found between the active and the non-active treatment periods. During the active period, an improvement was seen in the 10-meter comfortable gait test, time and steps. An improvement was seen in both the active and non-active periods for the GAS. CONCLUSIONS: Compliance was low, partly due to deviations related to the garment, complicating the interpretation of the results. Further research should focus on identifying the target population and concomitant rehabilitation strategies. CLINICAL REHABILITATION IMPACT: The evaluated concept of multifocal transcutaneous electrical stimulation (TES) represents an interesting addition to the existing repertoire of treatments to alleviate muscle spasticity. The evaluated concept allows TES to be self-administered by the patient in the home environment. A more elaborate design of training activities directly related to patients own rehabilitation goals is recommended and may increase the value of the evaluated concept.

    Place, publisher, year, edition, pages
    EDIZIONI MINERVA MEDICA, 2018
    Keywords
    Muscle spasticity; Randomized controlled trial; Cerebral palsy; Stroke; Transcutaneous electric nerve stimulation
    National Category
    Rheumatology and Autoimmunity
    Identifiers
    urn:nbn:se:liu:diva-151798 (URN)10.23736/S1973-9087.17.04791-8 (DOI)000445298800001 ()29072043 (PubMedID)
    Note

    Funding Agencies|Region Ostergotland; Promobilia Foundation; Inerventions AB (Vinnova)

    Available from: 2018-10-04 Created: 2018-10-04 Last updated: 2018-11-22
  • Hansson, Erik
    Linköping University, Department of Computer and Information Science, Artificial Intelligence and Integrated Computer Systems.
    Temporal Task and Motion Plans: Planning and Plan Repair: Repairing Temporal Task and Motion Plans Using Replanning with Temporal Macro Operators2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis presents an extension to the Temporal Fast Downward planning system that integrates motion planning in it and algorithms for generating two types of temporal macro operators expressible in PDDL2.1. The extension to the Temporal Fast Downward planning system includes, in addition to the integration of motion planning itself, an extension to the context-enhanced additive heuristic that uses information from the motion planning part to improve the heuristic estimate. The temporal macro operators expressible in PDDL2.1 are, to the author's knowledge, an area that is not studied within the context of plan repair before. Two types of temporal macro operators are presented along with algorithms for automatically constructing and using them when solving plan repair problems by replanning. Both the heuristic extension and the temporal macro operators were evaluated in the context of simulated unmanned aerial vehicles autonomously executing reconnaissance missions to identify targets and avoiding threats in unexplored areas. The heuristic extension was proved to be very helpful in the scenario. Unfortunately, the evaluation of the temporal macro operators indicated that the cost of introducing them is higher than the gain of using them for the scenario.

  • Hagman, William
    Linköping University, Department of Behavioural Sciences and Learning, Psychology. Linköping University, Faculty of Arts and Sciences.
    When are nudges acceptable?: Influences of beneficiaries, techniques, alternatives and choice architects2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Interventions aimed to change behavior (so called nudges) are becoming more and more popular among policymakers. However, in order to be able to effectively use nudges, it is important to understand when and why people find them acceptable. The objective of this thesis is therefore to improve the understanding of when nudges are judged to be acceptable. The thesis focuses on a model for behavioral change. The model contains two parts, nudge technique and acceptance of nudges. Nudge technique refers to how the nudge is designed to function in regard to psychological mechanism and functionality.

    The nudge technique part of the model is expanded and problematized from an ethical perspective in the first part of this thesis, by exemplifying psychological mechanisms behind different techniques and explaining why they might be intrusive to individuals’ freedom of choice. In the second part of this thesis it is discussed why acceptance is an important component of making nudging legitimate and effective. This is followed by a discussion of how acceptance is empirically measured. The empirical part of the thesis is based on four papers which all use a quantitative online survey approach to study the judgements of nudges from the general public.

    Paper 1 was a first attempt to measure whether nudges which are common in the nudge literature are acceptable interventions according to the general public. We found that the nudges that were categorized as pro-self were more likely to be rated as acceptable and less likely to be perceived as intrusive to freedom of choice compared to pro-social nudges. Furthermore, the effect of decision styles and worldview on acceptance was explored. In paper 2, we explored whether the difference between acceptance found for pro-social nudges and proself nudges could be increased by framing nudges as beneficial for society or individuals. The framing had no effect on acceptance but, as in paper 1, pro-social nudges were found to be more intrusive to freedom of choice compared to pro-self framed nudges. Moreover, different nudge techniques had different rates of acceptance even with the same explicit goal for the nudges. In paper 3, we examined whether the alternative to nudges affects the perceived acceptability and intrusiveness of default-changing nudge techniques. The alternatives given to the nudges were either to enforce the intended behavioral change with legislation or to do nothing at all in order to change the behavior. We find no difference in aggregated acceptance, however, the judgements vary depending on individuals’ worldview. Paper 4 explored if the choice architect’s (the creator/proposer of the nudge) political affiliation affects acceptance rating for proposed nudge interventions and legislation. We find that acceptance of both nudges and legislation increases with the level of matching between people’s political orientation and the choice architect’s political affiliation.

    Taken together, the findings suggest that there is more to creating an acceptable nudge than to merely take a nudge technique that was acceptable in one context and apply it in another. Moreover, nudges that are rated as more beneficial towards individuals compared to society at large are in general more likely to be found acceptable and less intrusive to freedom of choice. It is important to have knowledge about the target population (e.g. their decision styles, world-views, and political orientation) to avoid backfires when implementing nudges.  

    List of papers
    1. Public Views on Policies Involving Nudges
    Open this publication in new window or tab >>Public Views on Policies Involving Nudges
    2015 (English)In: Review of Philosophy and Psychology, ISSN 1878-5158, E-ISSN 1878-5166, Vol. 6, no 3, p. 439-453Article in journal (Refereed) Published
    Abstract [en]

    When should nudging be deemed as permissible and when should it be deemed as intrusive to individuals’ freedom of choice? Should all types of nudges be judged the same? To date the debate concerning these issues has largely proceeded without much input from the general public. The main objective of this study is to elicit public views on the use of nudges in policy. In particular we investigate attitudes toward two broad categories of nudges that we label pro-self (i.e. focusing on private welfare) and pro-social (i.e. focusing on social welfare) nudges. In addition we explore how individual differences in thinking and feeling influence attitudes toward nudges. General population samples in Sweden and the United States (n=952) were presented with vignettes describing nudge-policies and rated acceptability and intrusiveness on freedom of choice. To test for individual differences, measures on cultural cognition and analytical thinking were included. Results show that the level of acceptance toward nudge-policies was generally high in both countries, but were slightly higher among Swedes than Americans. Somewhat paradoxically a majority of the respondents also perceived the presented nudge-policies as intrusive to freedom of choice. Nudge- polices classified as pro-social had a significantly lower acceptance rate compared to pro-self nudges (p<.0001). Individuals with a more individualistic worldview were less likely to perceive nudges as acceptable, while individuals more prone to analytical thinking were less likely to perceive nudges as intrusive to freedom of choice. To conclude, our findings suggest that the notion of “one-nudge- fits-all” is not tenable. Recognizing this is an important aspect both for successfully implementing nudges as well as nuancing nudge theory. 

    Keywords
    Nudge; Libertarian Paternalism; Acceptability; Autonomi
    National Category
    Economics
    Identifiers
    urn:nbn:se:liu:diva-119071 (URN)10.1007/s13164-015-0263-2 (DOI)
    Projects
    Neuroekonomi
    Available from: 2015-06-08 Created: 2015-06-08 Last updated: 2018-11-22
  • Public defence: 2018-12-18 10:15 Ada Lovelace, B-huset, Linköping
    Albrektsson, Jörgen
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    Optimisation of Off-Road Transport Missions2018Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Mines, construction sites, road construction and quarries are examples of applications where construction equipment are used. In a production chain consisting of several construction machines working together, the work needs to be optimised and coordinated to achieve an environmental friendly, energy efficient and productive production. Recent rapid development within positioning services, telematics and human machine interfaces (HMI) opens up for control of individual machines and optimisation of transport missions where several construction machines co-operate.

    The production chain on a work site can be split up in different sub-tasks of which some can be transport missions. Taking off in a transport mission where one wheel loader ("loader" hereinafter) and two articulated haulers ("haulers" hereinafter) co-operate to transport material at a set production rate [ton/h], a method for fuel optimal control is developed. On the mission level, optimal cycle times for individual sub-tasks such as wheel loader loading, hauler transport and hauler return, are established through the usage of Pareto fronts.

    The haulers Pareto fronts are built through the development of a Dynamic Programming (DP) algorithm that trades fuel consumption versus cycle time for a road stretch by means of a time penalty constant. Through varying the time penalty constant n number of times, discrete fuel consumption - cycle time values can be achieved, forming the Pareto front. At a later stage, the same DP algorithm is used to generate fuel optimal vehicle speed and gear trajectories that are used as control signals for the haulers. Input to the DP algorithm is the distance to be travelled, road inclination, rolling resistance coefficient and a max speed limit to avoid unrealistic optimisation results.

    Thus, a method to describe the road and detect the road related data is needed to enable the optimisation. A map module is built utilising an extended Kalman Filter, Rauch-Tung-Striebel smoother and sensor fusion to merge data and estimate parameters not observable by sensors. The map module uses a model of the vehicle, sensor signals from a GPS or GNSS sensor and machine sensors to establish a map of the road.

    The wheel loader Pareto front is based on data developed in previous research combined with Volvo in-house data. The developed optimisation algorithms are implemented on a PC and in an interactive computer tablet based system. A human machine interface is created for the tablet, guiding the operators to follow the optimal control signals, which is speed for the haulers and cycle time for the loader. To evaluate the performance of the system it is tested in real working conditions.

    The contributions develop algorithms, set up a demo mission control system and carry out experiments. Altogether rendering in a platform that can be used as a base for a future design of an off-road transport mission control system.

    List of papers
    1. Road estimation and fuel optimal control of an off-road vehicle
    Open this publication in new window or tab >>Road estimation and fuel optimal control of an off-road vehicle
    2017 (English)In: Proceedings of the 3rd International Conference on Vehicle Technology and Intelligent Transport Systems, SciTePress, 2017, p. 58-67Conference paper, Published paper (Refereed)
    Place, publisher, year, edition, pages
    SciTePress, 2017
    National Category
    Control Engineering
    Identifiers
    urn:nbn:se:liu:diva-142731 (URN)10.5220/0006247200580067 (DOI)978-989-758-242-4 (ISBN)
    Conference
    3rd International Conference on Vehicle Technology and Intelligent Transport Systems, VEHITS 2017, April 22-24, 2017, in Porto, Portugal
    Available from: 2018-04-03 Created: 2018-04-03 Last updated: 2018-11-22
    2. Fuel Optimal Control of an Articulated Hauler Utilising a Human Machine Interface
    Open this publication in new window or tab >>Fuel Optimal Control of an Articulated Hauler Utilising a Human Machine Interface
    2019 (English)In: Smart Cities, Green Technologies, and Intelligent Transport Systems / [ed] Donnellan, Brian; Klein, Cornel; Helfert, Markus; Gusikhin, Oleg; Pascoal, António, Springer International Publishing , 2019, p. 190-208Conference paper, Published paper (Refereed)
    Abstract [en]

    Utilising optimal control presents an opportunity to increase the fuel efficiency in an off-road transport mission conducted by an articulated hauler. A human machine interface (HMI) instructing the hauler operator to follow the fuel optimal vehicle speed trajectory has been developed and tested in real working conditions. The HMI implementation includes a Dynamic Programming based method to calculate the optimal vehicle speed and gear shift trajectories. Input to the optimisation algorithm is road related data such as distance, road inclination and rolling resistance. The road related data is estimated in a map module utilising an Extended Kalman Filter (EKF), a Rauch-Tung-Striebel smoother and a data fusion algorithm. Two test modes were compared: (1) The hauler operator tried to follow the optimal vehicle speed trajectory as presented in the HMI and (2) the operator was given a constant target speed to follow. The objective of the second test mode is to achieve an approximately equal cycle time as for the optimally controlled transport mission, hence, with similar productivity. A small fuel efficiency improvement was found when the human machine interface was used.

    Place, publisher, year, edition, pages
    Springer International Publishing, 2019
    Series
    Communications in Computer and Information Science book series (CCIS), ISSN 1865-0929, E-ISSN 1865-0937 ; 921
    Keywords
    Off-road, Construction equipment, Human machine interface, Optimal control, Dynamic programming, Kalman filters
    National Category
    Vehicle Engineering
    Identifiers
    urn:nbn:se:liu:diva-153311 (URN)10.1007/978-3-030-02907-4_10 (DOI)978-3-030-02906-7 (ISBN)978-3-030-02907-4 (ISBN)
    Conference
    6th International Conference, SMARTGREENS 2017 and Third International Conference, VEHITS 2017, Porto, Portugal, April 22–24, 2017
    Available from: 2018-12-12 Created: 2018-12-12 Last updated: 2018-12-12
    3. Fuel optimal control of an off-road transport mission
    Open this publication in new window or tab >>Fuel optimal control of an off-road transport mission
    2018 (English)In: 2018 IEEE International Conference on Industrial Technology (ICIT), 2018, p. 175-180Conference paper, Published paper (Refereed)
    National Category
    Electrical Engineering, Electronic Engineering, Information Engineering
    Identifiers
    urn:nbn:se:liu:diva-151856 (URN)10.1109/ICIT.2018.8352172 (DOI)978-1-5090-5949-2 (ISBN)
    Conference
    2018 IEEE International Conference on Industrial Technology (ICIT), 19-22 Feb.,Lyon, France
    Available from: 2018-10-06 Created: 2018-10-06 Last updated: 2018-11-22
  • Schultze, Felix
    Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    Coteaching chemical bonding with Upper secondary senior students: A way to refine teachers PCK2018Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The aim of this study was to investigate how an experienced chemistry teacher gains and refines her pedagogical content knowledge (PCK) by cooperating with two grade 12 students (age 18) as coteachers while teaching chemical bonding in a grade 10 Upper secondary class. The study has been conducted from a sociocultural perspective, especially Vygotsky’s zone of proximal development (ZPD) (Vygotsky, 1978). Other theoretical concepts and models that has framed this study are Shulman´s Pedagogical content knowledge (PCK) and Pedagogical reasoning and action model (Shulman, 1986, 1987). When analysing the data, Magnusson, Krajcik, and Borko´s (1999) model of PCK and the 2017 Refined consensus model of PCK (Carlson, Daehler, et al., in press) was used. Empirical data was collected by video- and audio recorded lessons, coreflection sessions, coplanning sessions and interviews. During 10 weeks, about 28 hours of video and audio recordings was collected. Selected parts of the material were transcribed and analysed in order to answer two questions: (1) How can chemistry teachers refine their PCK when coteaching together with senior students in an Upper secondary science class? (2) How do Upper secondary senior student coteachers´ conceptual knowledge of representations and chemical bonding shape a teacher’s foundation of personal PCK (pPCK) when teaching chemical bonding in an Upper secondary science class?

    The results relating to research question one indicates that the coteachers contributed with their own learning experiences to help the teacher understand how students perceive difficult concepts. The coteachers were mediating between the teacher and the students, thus bridging the gap between the teacher and the students’ frames of references. The experienced chemistry teacher improved her understanding of students´ thinking about themselves as learners of chemical bonding. Regarding the second research question, the findings showed that the creative process of reconstructing concepts of chemical bonding in the coplanning sessions meant that these were a useful tool for developing new teaching strategies and to further develop representations such as drama to illustrate chemical bonding. Together, the teacher and student coteachers, constructed a new representation that better illustrated polar covalent bonding.

    Taken together, these results provide important insights into how the chemistry teacher´s pPCK was refined and how the coteachers contributed to improve instructional strategies.

    List of papers
    1. Coteaching with senior students – a way to refine teachers’ PCK for teaching chemical bonding in upper secondary school
    Open this publication in new window or tab >>Coteaching with senior students – a way to refine teachers’ PCK for teaching chemical bonding in upper secondary school
    2018 (English)In: International Journal of Science Education, ISSN 0950-0693, E-ISSN 1464-5289, Vol. 40, no 6, p. 688-706Article in journal (Refereed) Published
    Abstract [en]

    ABSTRACTDuring the last decade there has been on-going discussions about students’ declining interest and low achievement in science. One of the reasons suggested for this decline is that teachers and students have different frames of reference, whereby teachers sometimes communicate science in the classroom in a way that is not accessible to the students. There is a lack of research investigating the effects of coteaching with senior students in science in upper secondary schools. To improve teaching and to narrow the gap between teachers’ and students’ different frames of references, this study investigates how an experienced chemistry teacher gains and refines her pedagogical content knowledge (PCK) by cooperating with two grade 12 students (age 18) as coteachers. The teacher and the two coteachers coplanned, cotaught and coevaluated lessons in chemical bonding in a grade 10 upper secondary class. Findings indicate that the coteachers contributed with their own learning experiences to help the teacher understand how students perceive difficult concepts. In such way, the coteachers were mediating between the teacher and the students, thus bridging the gap between the teacher and the students’ frames of references. The teachers’ PCK was refined which in turn lead to improved teaching strategies.

    Place, publisher, year, edition, pages
    Routledge, 2018
    National Category
    Learning
    Identifiers
    urn:nbn:se:liu:diva-152777 (URN)10.1080/09500693.2018.1436792 (DOI)
    Available from: 2018-11-21 Created: 2018-11-21 Last updated: 2018-11-21Bibliographically approved
  • Sköld, Birgitta
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences. Linköping University, HELIX Competence Centre.
    Tillmar, Malin
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences. Linköping University, HELIX Competence Centre. Institutionen för organisation och entreprenörskap, Linnéuniversitetet.
    Ahl, Helene
    Avdelningen för psykologi och pedagogik , Högskolan för lärande och kommunikation, Jönköping University.
    Berglund, Karin
    Företagsekonomiska institutionen, Stockholms universitet.
    Pettersson, Katarina
    Institutionen för stad och land, Avdelningen för landsbygdsutveckling, Lantbruksuniversitet, Uppsala.
    Kvinnors företagande i landsbygdskommuner med fokus på Småland och Öland: En kvantitativ kartläggning inom ramen för forskningsprojektet ”Kvinnors företagande för en levande landsbygd”2018Report (Other academic)
    Abstract [sv]

    En livskraftig landsbygd med tillgång till arbetskraft, arbetstillfällen och välfärdsservice är en aktuell samhällsfråga. Företagandets omfattning på landsbygden är en aspekt som kan ha betydelse för landsbygdskommunernas sårbarhet. Syftet med rapporten är att utveckla kunskap om kvinnors entreprenörskap på landsbygden, som kan ligga till grund för att stimulera landsbygdsutveckling, jämställdhet och vidare forskning, exempelvis genom kvalitativa forskningsmetoder.

    Med hjälp av en databasstudie beskrivs och analyseras omfattningen och karaktären av kvinnors företagande på landsbygden. Till viss del studeras också likheter och skillnader i företagandet mellan kvinnor födda i Sverige och kvinnor födda utomlands, samt mellan kvinnor och män.

    Företagandet är mer omfattande bland de sysselsatta kvinnorna på landsbygden än bland de sysselsatta kvinnorna i tätorterna. Skillnaderna i omfattningen av kvinnors företagande är små mellan olika typer av landsbygdskommuner – de som är avlägset belägna, mycket avlägset belägna eller belägna nära en större stad. Resultaten indikerar snarare att det är kommunernas företagskaraktär eller tradition av företagande som avgör andelen företagare per sysselsatta. Kartläggningen pekar mot att arbetslöshet kan vara ett incitament för företagande – något starkare för de utlandsfödda kvinnorna än för kvinnorna födda i Sverige. Skogsförvaltning och blandat jordbruk är bland de vanligaste näringsgrenarna för både kvinnor och män på landsbygden. I övrigt är dock företagandet mycket könssegregerat med avseende på bransch. De tio vanligaste näringsgrenarna för kvinnor och män skiljer sig markant åt. Kvinnors företag är mest representerade i Hår- och kroppsvård, Restaurangverksamhet, Redovisning och bokföring, Konsultverksamhet avseende företags organisation, Fysioterapeutisk verksamhet samt Litterärt och konstnärligt skapande. Mäns vanligaste näringsgrenar är mer relaterade till landsbygdens kontext av mark- och naturresurser. Kvinnors företag är små, 76 procent är soloföretag och lönsamheten varierar stort. De näringsgrenar där kvinnors företag redovisar högst lönsamhet är i de numerärt mansdominerade näringsgrenarna inom tillverkningsindustrin. Resultaten indikerar därmed könssegregering och hierarki med avseende på arbets- och resursfördelning.

    Kvinnor på landsbygden är mer benägna att vara företagare än anställda om de är gifta, har hemmavarande barn eller en utbildningsnivå lägre än den eftergymnasiala. Det kan tolkas som att företagandet är en lösning för att kombinera arbetsliv med ansvar för hem och barn. De företagande kvinnornas disponibla inkomster är i genomsnitt lägre än för kvinnor med anställning, för män som är företagare och för män med anställning. Att vara gift innebär för kvinnor en lägre disponibel inkomst, men för män en högre disponibel inkomst jämfört med att att inte vara gift. Resultaten visar dock att det inte är de individrelaterade faktorerna som mest bidrar till skillnader i disponibel inkomst, utan, näringsgren och antalet sysselsatta. Manligt könskodade näringsgrenar och stora företag ger högre inkomst. Den övergripande slutsatsen är att företagandet på landsbygden är traditionellt könssegregerat och hierarkiserat, i fråga om resursfördelning.

  • Ho, Du
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, Faculty of Science & Engineering.
    Some results on closed-loop identification of quadcopters2018Licentiate thesis, monograph (Other academic)
    Abstract [en]

    In recent years, the quadcopter has become a popular platform both in research activities and in industrial development. Its success is due to its increased performance and capabilities, where modeling and control synthesis play essential roles. These techniques have been used for stabilizing the quadcopter in different flight conditions such as hovering and climbing. The performance of the control system depends on parameters of the quadcopter which are often unknown and need to be estimated. The common approach to determine such parameters is to rely on accurate measurements from external sources, i.e., a motion capture system. In this work, only measurements from low-cost onboard sensors are used. This approach and the fact that the measurements are collected in closed-loop present additional challenges.

    First, a general overview of the quadcopter is given and a detailed dynamic model is presented, taking into account intricate aerodynamic phenomena. By projecting this model onto the vertical axis, a nonlinear vertical submodel of the quadcopter is obtained. The Instrumental Variable (IV) method is used to estimate the parameters of the submodel using real data. The result shows that adding an extra term in the thrust equation is essential.

    In a second contribution, a sensor-to-sensor estimation problem is studied, where only measurements from an onboard Inertial Measurement Unit (IMU) are used. The roll submodel is derived by linearizing the general model of the quadcopter along its main frame. A comparison is carried out based on simulated and experimental data. It shows that the IV method provides accurate estimates of the parameters of the roll submodel whereas some other common approaches are not able to do this.

    In a sensor-to-sensor modeling approach, it is sometimes not obvious which signals to select as input and output. In this case, several common methods give different results when estimating the forward and inverse models. However, it is shown that the IV method will give identical results when estimating the forward and inverse models of a single-input single-output (SISO) system using finite data. Furthermore, this result is illustrated experimentally when the goal is to determine the center of gravity of a quadcopter.

  • Löf, Jenny
    et al.
    Linköping University, Department of Social and Welfare Studies, Social Work. Linköping University, Faculty of Arts and Sciences. Linkoping University.
    Olaison, Anna
    Linköping University, Department of Social and Welfare Studies, Social Work. Linköping University, Faculty of Arts and Sciences.
    ‘I don’t want to go back into the closet just because I need care’ [‘Jag vill inte gå tillbaka i garderoben bara för att jag behöver vård’]: recognition of older LGBTQ adults in relation to future care needs [Erkännande av äldre HBTQ personer i relation till framtida omsorgsbehov]2018In: European Journal of Social Work, ISSN 1369-1457, E-ISSN 1468-2664Article in journal (Refereed)
    Abstract [en]

    There is increasing awareness in research about the social service needs of older LGBTQ adults. However, there are few studies that deal with differences in this community regarding elder care services. As a rule, transgender individuals are not included in these studies. This study focuses on how older Swedish LGBTQ adults reason about openness in an elder care context concerning their future needs for services and adopts Nancy Fraser’s theoretical framework of recognition. The material consists of fifteen semi-structured interviews with older LGBTQ adults. The results indicate that the main concern for older LGBTQ individuals is being accepted for their preferred sexual orientation and/or gender identity in elder care. However, there were differences regarding that concern in this LGBTQ group. There were also a variety of approaches in the group as to preferences for equal versus special treatment with respect to their LGBTQ identity. In addition, there were differences as to whether they prefer to live in LGBTQ housing or not. The findings contribute to existing knowledge by highlighting the diverse views on elder care services in both this group of interviewees and its subgroups. These findings emphasise the importance of the social work practice recognising different preferences and having an accepting approach. The results can further provide guidance on how to design elder care services for older LGBTQ adults.

  • Olsson, Nelly
    et al.
    Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Medicine and Health Sciences.
    Norström Darlin, Maria
    Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Medicine and Health Sciences.
    En studie av lexikon och gestproduktion hos barn med respektive utan språkstörning genom utförandet av ordförrådstestet PiNG2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
  • Edling, Isabelle
    et al.
    Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Medicine and Health Sciences.
    Söderqvist Sandin, Nicole
    Linköping University, Department of Clinical and Experimental Medicine. Linköping University, Faculty of Medicine and Health Sciences.
    Högteknologiskt samtalsstöd som gruppaktivitet för personer med demenssjukdom2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Dementia means significant cognitive decline in language, memory and executive functions. Dementia is associated with progressive communication difficulties, which can result in reduced quality of life. To promote quality of life, the communicative environment, participation in group activities and cognitive stimulation have great significance. Cognitive stimulation can delay, slow or prevent symptoms of dementia. Furthermore, information and communication technology (ICT) has promising results in relation to dementia. However, research including psychosocial intervention are limited, which motivates present study.

    The present study is the first Swedish study which purpose was to promote social interaction for people with dementia through conversational sessions as a group activity when using the communication aid CIRCA (Computer Interactive Reminiscence and Communication Aid). Further purpose was to contribute to the understanding of high technological communication aids’ potential to facilitate and support communication for people with dementia. Five individuals with dementia were recruited from a residential care home. The study comprises a seven-session CIRCA-based group activity, and the material consist of seven hours and fifteen minutes recordings. The analysis included mapping of conversational topics where particularly interesting interactive phenomena were selected that were considered representative of the interaction.

    The results showed that the conversational sequences could relate to the content of CIRCA, the management of the tablet or were as a result of the content in CIRCA. Characteristic interactional phenomena were enjoyable group dynamics with laughter, humour, singing and social inclusion where participants contributed with information, personal experiences and asked each other questions. Furthermore, a symmetric interaction emerged between participants and between participants and the facilitator. The participants considered the group sessions in use of CIRCA to be enjoyable, amusing, informative and provided conversational topics and simplified the conversations in comparison to without communication aid.

    The results indicate that CIRCA has promising potential to be utilized as a group activity for people with dementia. CIRCA could be applicable in residential care homes where caregivers’ opportunities to socialize one-to-one is limited. Furthermore, the multimedia of CIRCA can offer a variation that may cater to several individuals interests. CIRCA could constitute a group intervention to promote activity, interaction and social relationships, that could improve the quality of life of people with dementia.

  • Anderjon, Stina
    Linköping University, Department of Physics, Chemistry and Biology, Chemistry.
    Gymnasiekemin, förr och nu: En historisk överblick hur gymnasiekemin har förändrats över tid och hur detta kan ha bidragit till elevers förståelse för kemi2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • Veibäck, Clas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, Faculty of Science & Engineering.
    Tracking the Wanders of Nature2018Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Target tracking is a mature topic with over half a century of mainly military and aviation research. The field has lately expanded into a range of civilian applications due to the development of cheap sensors and improved computational power. With the rise of new applications, new challenges emerge, and with better hardware there is an opportunity to employ more elaborated algorithms.

    There are five main contributions to the field of target tracking in this thesis. Contributions I-IV concern the development of non-conventional models for target tracking and the resulting estimation methods. Contribution V concerns a reformulation for improved performance. To show the functionality and applicability of the contributions, all proposed methods are applied to and verified on experimental data related to tracking of animals or other objects in nature.

    In Contribution I, sparse Gaussian processes are proposed to model behaviours of targets that are caused by influences from the environment, such as wind or obstacles. The influences are learned online as a part of the state estimation using an extended Kalman filter. The method is also adapted to handle time-varying influences and to identify dynamic systems. It is shown to improve accuracy over the nearly constant velocity and acceleration models in simulation. The method is also evaluated in a sea ice tracking application using data from a radar on Svalbard.

    In Contribution II, a state-space model is derived that incorporates observations with uncertain timestamps. An example of such observations could be traces left by a target. Estimation accuracy is shown to be better than the alternative of disregarding the observation. The position of an orienteering sprinter is improved using the control points as additional observations.

    In Contribution III, targets that are confined to a certain space, such as animals in captivity, are modelled to avoid collision with the boundaries by turning. The proposed model forces the predictions to remain inside the confined space compared to conventional models that may suffer from infeasible predictions. In particular the model improves robustness against occlusions. The model is successfully used to track dolphins in a dolphinarium as they swim in a basin with occluded sections.

    In Contribution IV, an extension to the jump Markov model is proposed that incorporates observations of the mode that are state-independent. Normally, the mode is estimated by comparing actual and predicted observations of the state. However, sensor signals may provide additional information directly dependent on the mode. Such information from a video recorded by biologists is used to estimate take-off times and directions of birds captured in circular cages. The method is shown to compare well with a more time-consuming manual method.

    In Contribution V, a reformulation of the labelled multi-Bernoulli filter is used to exploit a structure of the algorithm to attain a more efficient implementation.Modern target tracking algorithms are often very demanding, so sound approximations and clever implementations are needed to obtain reasonable computational performance. The filter is integrated in a full framework for tracking sea ice, from pre-processing to presentation of results.

  • Glad, Cecilia
    et al.
    Linköping University, Department of Behavioural Sciences and Learning.
    Malmborg, Anna Karin
    Linköping University, Department of Behavioural Sciences and Learning.
    "Dom här mötena liknar inga andra (.) det kan du lugnt ge dig på": En samtalsanalys av arbetsmötets institutionella samtal2018Independent thesis Basic level (degree of Bachelor), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Uppsatsens syfte är att fördjupa kunskapen om arbetsmöten mellan kollegor där problemlösning är centralt. Genom detaljerade samtalsanalyser beskrivs samtalets organisering som framgår i samtalens samtalsfaser. Studien har en etnometodologisk ansats för att genomföra en samtalsanalys. Datainsamlingen har skett genom att filma fyra arbetsmöten som sedan observerats för att identifiera olika samtalsfaser som därefter transkriberats. Resultatet har analyserats med Goffmans dramaturgiska perspektiv och Bions gruppteori.   Tidigare forskning visar att studier av arbetsmöten kollegor emellan är eftersatt, därför är kunskapen eftersatt om vad som karakteriserar sådana möten som samtalspraktiker.       Studien visar att man i kollegiala arbetsmöten skapar konsensus genom att ha ett professionellt förhållningssätt vid problemlösning och för att acceptera förklaringar till varför man arbetar som man gör. Man tar inte personlig ställning utan förklarar ställningstagande med regelverk och organisationens policy. Studiens resultat synliggör dolda inslag som kan förekomma i kollegiala samtalskulturer som får konsekvenser för organisering av arbetsmöten och deras utfall.   

  • Kiwi, Mahin
    Linköping University, Department of Social and Welfare Studies, Division of Nursing Science. Linköping University, Faculty of Medicine and Health Sciences.
    Dementia across cultural borders: Reflections and thought patterns of elderly Iranians with dementia in Sweden, their relatives and staff at a culturally profiled nursing home2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Introduction: Today’s multicultural society has resulted in major changes, with healthcare undergoing significant modifications. Healthcare workers and patients are increasingly confronted with “cultural” backgrounds other than their own. The world’s population is ageing, and the number of people with dementia is growing, resulting in a growing number of older people with a foreign background whose care needs have increased at different rates. Migration does not only mean moving from one place to another; it also involves the transition of an individual’s lifestyle, life views, social and economic adjustments that may lead to certain changes. These transitions from the “old” to the “new” way of life and from a life without dementia to a life with dementia involve making sense of life’s changes.

    Aim: The aim of study I was to explore the experiences and perceptions of dementia among Iranian staff working in a culturally profiled nursing home (CPNH). The aim of studies II and III was to explore relatives’ decisions to end caregiving at home, and Iranian families’ and relatives’ attitudes towards CPNHs in Sweden. The aim of study (IV) was to explore how the residents with dementia at the CPNH expressed the feeling of “home”.

    Method: This thesis is based on more than one year’s fieldwork. The empirical material is based on interviews and observations. Three groups of participants were interviewed and observed: 10 people with dementia (IV), 20 family caregivers and relatives (II and III, respectively) and 34 staff members (I). The interviews were conducted in Persian/Farsi, Azerbaijani, English and Swedish. The choice of language was always up to the participants. All the interviews were audio-recorded, transcribed verbatim in the respective languages and then translated later into Swedish. The analysis of the material was based on content analysis blended with ethnography.

    Results: Study I shows that people from different culturally and linguistically diverse backgrounds could have different perceptions of what dementia entails. A lack of knowledge concerning dementia affects how staff approach these people.

    Study II shows that the CPNH is crucial when deciding to cease caregiving at home. It is important to ensure that relatives with dementia are cared for by someone who speaks the same mother tongue. The results indicate that positive feelings of relief or comfort are dominant responses among the participants, some of whom even feel pride in the high standard of care provided by the home.

    In Study III, most participants based their views on a comparison between the CPNH and Iranian nursing homes after the Islamic Revolution. Negative views of the nursing home were evaluated alongside what the respondents considered to be typically Iranian. In Study IV, the results show that people with dementia’s personal experiences of home played a great role, and although none of the participants felt at home, all of them stated that the CPNH was a place to live in.

    Conclusion: Perceptions of dementia can be based on cultural and traditional understanding, although this can shift through transition and knowledge accumulation. A lack of knowledge concerning dementia and residents’ sociocultural background, generational differences and incoherence, aligned with staff members’ different sociocultural backgrounds, created many challenges. The staff wanted to learn more about dementia, to be able to manage daily communication with the residents. On another point, the staff admitted that only being able to speak a person’s native language was not enough to claim that they were actually communicating. Family caregivers’ decisions to end caregiving at home involve mutuality, capability and management, but decision-making sometimes has nothing to do with violating a person’s autonomy and is more about protecting the person. The family caregivers do care for frail elderly family members. What has changed due to a transition is the structure and construction of family caregiving. The consequences of communication difficulties between staff and the residents have led to a small degree of social involvement, which in turn affects residents’ daily social state. Overall, many family members stated that the CPNH resembled Iran too much, which disturbed them.

    The residents thought of home as a geographical location, but also connected it with both positive and negative feelings. Furthermore, the CPNH reminded some of the residents of the nicer side of life back home in Iran, while for others it brought back sad experiences and memories from the past. Nevertheless, the nursing home, due to memories and experiences of life in Iran, “home”, was a place to be and to live.

    List of papers
    1. Frankly, None of Us Know What Dementia Is: Dementia Caregiving Among Iranian Immigrants Living in Sweden
    Open this publication in new window or tab >>Frankly, None of Us Know What Dementia Is: Dementia Caregiving Among Iranian Immigrants Living in Sweden
    2015 (English)In: Care Management Journals, ISSN 1521-0987, Vol. 16, no 2, p. 79-94Article in journal (Refereed) Published
    Abstract [en]

    In quite a short amount of time, Sweden has gone from being a relatively homogeneous society to a multicultural one, with a rapid expansion of immigrants having culturally and linguistically diverse (CALD) backgrounds growing old in Sweden. This is particularly interesting in relation to studying age-related dementia diseases. Research shows that not only do CALD persons with dementia diseases tend to mix languages, have difficulties with separation of languages, or revert to speaking only their native tongue as the disease progresses, but they also show tendencies to experience that they live in the cultural environment in which they were brought up, rather than in the current Swedish one. In this article, we explore findings in relation to one such CALD group in Sweden, Iranians. The article is empirically driven and based on data gathered in 2 separate settings with specific ethnocultural profiles, offering dementia care with Middle Eastern, Arab, and/or Persian profile. Observations were carried out in combination with semistructured in-depth interviews (n = 66). By using a combination of content and ethnographic analysis, 4 main findings related to ethnocultural dementia care were elucidated. These include (a) a wider recognition of people from different CALD backgrounds possibly having different perceptions of what dementia is, (b) a possibility that such ascribed meaning of dementia has a bearing on health maintenance and health-seeking behavior as well as the inclination to use formal services or not, (c) choosing to use formal service in the forms of ethnoculturally profiled dementia care facility seems to relate to being able to “live up to ideals of Iranian culture,” and (d) “culture,” however ambiguous and hotly debated a concept it is, appears to be a relevant aspect of people's lives, an aspect that is both acquired as well as ascribed to oneself and to others. As such, we argue that culture needs to be further addressed in relation to dementia care in multicultural societies because ascribing culture boxes people in as well as out. In addition, ethnocultural contextualization of dementia care needs to be understood in relation to this because it affects the care provided.

    Keywords
    dementia, caregiving, illness, ethnoculturally profiled care
    National Category
    Gerontology, specialising in Medical and Health Sciences
    Identifiers
    urn:nbn:se:liu:diva-119110 (URN)10.1891/1521-0987.16.2.79 (DOI)
    Projects
    Ethnic diversity and dementia: cultural, social and linguistic aspects
    Funder
    Riksbankens Jubileumsfond
    Available from: 2015-06-09 Created: 2015-06-09 Last updated: 2018-11-20
    2. Deciding upon Transition to Residential Care for Persons Living with Dementia: why Do Iranian Family Caregivers Living in Sweden Cease Caregiving at Home?
    Open this publication in new window or tab >>Deciding upon Transition to Residential Care for Persons Living with Dementia: why Do Iranian Family Caregivers Living in Sweden Cease Caregiving at Home?
    2018 (English)In: Journal of Cross-Cultural Gerontology, ISSN 0169-3816, E-ISSN 1573-0719, Vol. 33, no 1, p. 21-42Article in journal (Refereed) Published
    Abstract [en]

    Previous research has shown how filial piety is strong among people of Iranian background and that traditional Iranian culture result in most families’ preferring to care for their elderly (and sick) family members at home. While acknowledging this, this article highlights what living in diaspora could mean in terms of cultural adaption and changing family values. By interviewing people with Iranian background living in Sweden (n = 20), whom all have been former primary caregivers to a relative living with dementia, we are able to show how the decision to cease caregiving at home is taken, and what underlying factors form the basis for such decision. Results indicate that although the existence of a Persian profiled dementia care facility is crucial in the making of the decision, it is the feeling of ‘sheer exhaustion’ that is the main factor for ceasing care at home. And, we argue, the ability to make such a decision based upon ‘being too tired’ must be understood in relation to transition processes and changes in lifestyle having an affect upon cultural values in relation to filial piety. Because, at the same time the changes on cultural values might not change accordingly among the elderly who are the ones moving into residential care, resulting in them quite often being left out of the actual decision.

    Place, publisher, year, edition, pages
    Springer-Verlag New York, 2018
    Keywords
    Caregiver, Dementia diseases, Iranian immigrants, Care at home, Care at residential nursing home, Transition
    National Category
    Public Health, Global Health, Social Medicine and Epidemiology Nursing
    Identifiers
    urn:nbn:se:liu:diva-152760 (URN)10.1007/s10823-017-9337-1 (DOI)000427289500002 ()29170865 (PubMedID)2-s2.0-85034757762 (Scopus ID)
    Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2018-11-30Bibliographically approved
    3. Iranian relatives' attitudes towards culturally profiled nursing homes for individuals living with dementia
    Open this publication in new window or tab >>Iranian relatives' attitudes towards culturally profiled nursing homes for individuals living with dementia
    2017 (English)In: Dementia, ISSN 1471-3012, E-ISSN 1741-2684, p. 1-17Article in journal (Refereed) Epub ahead of print
    Abstract [en]

    This article discusses Iranian family members attitudes towards the culturally profiled nursing home, their relationships with the staff, the obstacles, their hopes and their fears. This study is based on qualitative research using 29 semi-structured interviews with family members who had previously been informal caregivers, as well as using fieldwork, all in the same nursing home. The interviews were analysed by the three steps of content analysis. The results show the identification of three main categories with nine main subcategories. The categories and subcategories in the table clarify and explain how the interviewees tended to compare the situation in Iran with that in Sweden, how they perceived the situation in Sweden and finally how they also saw the culturally profiled nursing home.

    Place, publisher, year, edition, pages
    Sage Publications, 2017
    Keywords
    culturally profiled nursing home; nursing home
    National Category
    Nursing
    Identifiers
    urn:nbn:se:liu:diva-144853 (URN)10.1177/1471301217743835 (DOI)29192514 (PubMedID)
    Available from: 2018-02-05 Created: 2018-02-05 Last updated: 2018-11-20Bibliographically approved
  • Niskanen, Johan
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Mainstreaming passive houses: A study of energy efficient residential buildings in Sweden2018Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The passive house concept has become increasingly popular in the building sector in the lost twenty years ond is deemed to ploy on important role in aligning the housing sector with climate and environmental policy objectives. However, for such buildings to ploy this port they need to be more widespread, more common and more accepted by mainstream actors and institutions. The deployment of passive houses involves changes and adaptations in different parts of society. It involves changes in institutional and organisational set-ups, and it involves market and regulatory changes. Previous research on passive houses has focused on demonstration projects or has taken for granted that a dissemination will lead to a full-scale transition of the building sector. This puts undue focus on emerging actors and technologies emerging in isolation. This thesis investigates the wider deployment of passive houses with a focus on mainstreaming. This means that focus is on different social arenas where the deployment of passive houses is negotiated between multiple actors. This thesis contributes to a comprehensive picture of how passive house deployment is shaped through a study of attempts to mainstream these buildings in Sweden. It shows how such attempts hove been partially successful in specific companies and regions, but it also show how a normalization of these buildings has been limited due to market, regulatory, and political developments

  • Hospers, Gert Jan
    et al.
    University Nijmegen, The Netherlands.
    Syssner, Josefina
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Verheul, Wouter Jan
    TU Delft, Netherlands .
    How the Dutch deal with demographic decline2015In: Workshop Exploring the Future of Suburban Neighbourhoods under Conditions of Declining Growth, Friday, 14th November 2014, KunstSalon, Köln / [ed] Tine Köhler & M agdalena Leyser-Droste, Dortmund: ILS Research Institute for Regional and Urban Development , 2015, p. 17-21Conference paper (Other academic)
    Abstract [en]

    For the past few years, there has been much attention paid to demographic decline in the Netherlands. Initially, the shrinkage of an area’s population was considered as a marginal phenomenon in the peripheral regions, such as Limburg, Groningen and Zeeland. However, now, it is recognized as an omnipresent phenomenon. According to the Netherlands Environmental Assessment Agency, up to 2030 a quarter of the Dutch municipalities will experience a population decline of more than 2.5% (PBL 2014). Furthermore, this decline will not remain limited to areas on the edges of the Netherlands. For example, villages within the Randstad conurbation are already having to deal with that now. There is also a demographic decline in the large cities such as Rotterdam and Almere. Here, we usually see that one district is growing at the expense of another.

  • Erlingsson, Gissur Ó
    et al.
    Linköping University, Department for Studies of Social Change and Culture, Centre for Municipality Studies – CKS. Linköping University, Faculty of Arts and Sciences.
    Flemgård, Johan
    Linköping University, Department of Management and Engineering, Political Science. Linköping University, Faculty of Arts and Sciences.
    Att (om)organisera den politiska basorganisationen: om effekter av kommunsammanläggningar och mellankommunala samarbeten2018Report (Other academic)
    Abstract [sv]

    Mitt intresse för kommuner, kommunpolitik och kommunforskning väcktes till liv när jag var statsvetarstudent i slutet av 1990-talet. Under våren 1997 kunde man läsa följande i KommunAktuellt:

    Frågan om delning av kommuner är het. Bara under den senaste veckan hade den diskuterats i minst fyra fullmäktige. Kammarkollegiet dignar under ansökningar, yttranden och andra underlag.

    Under 1990-talet var detta vanligt. Under 1990-talet var flera delningskampanjer framgångsrika (Trosa, Gnesta, Lekeberg, Bollebygd, Nykvarn och Knivsta var kommuner som alla såg dagens ljus under detta årtionde). Utöver det, gick drygt tjugo kommundelar så långt som till en formell ansökan om kommundelning hos Kammarkollegiet – men fick avslag. Jag var skeptisk till den här utvecklingen. Jag misstänkte att det var ett uttryck för ett slags balkanisering och en minskad omsorg för gemensam problemlösning och likvärdighet. Den drev mig till att skriva magisteruppsatsen Kommundelningar: De rikas uttåg från det gemensamma eller demokratins räddning? (Lund: Statsvetenskapliga institutionen).

    1990-talets delningstrend var begriplig i ljuset av det generella omhuldandet av det småskaliga som då rådde. Ett uttryck för det var att den borgerliga regering som vann valet 1991 deklarerade att den skulle underlätta kommundelningar, bäst förkroppsligat av civilminister Inger Davidssons formulering, att en ”viktig del av utvecklingen sker i små, naturliga gemenskaper”. Knappt tio år senare, år 2000, stod Åsa Torstensson (C) i riksdagens talarstol och argumenterade för att Sverige borde ha en kommunstruktur med 100 nya kommuner. I sitt slutbetänkande argumenterade också den Bengt Göranssonska Demokratiutredningen för det goda med kommundelningar. Senaste träffen på sökordet ”kommundelning” bland riksdagens motioner är så sent som 2006. Kerstin Lundgren (C) önskade då underlätta för delning av kommuner. I skrivande stund är det tolv år sedan.

    I föreliggande rapport visar vi att den offentliga debatten har vänt både snabbt och kraftigt på det här området. Allt fler vill se en ny svensk kommunreform med väsentligt större – och därmed färre – kommuner. Mot den bakgrunden har syftet med föreliggande rapport varit att inventera forskning från andra utvecklade demokratier för att se om sammanläggningar har varit ett ändamålsenligt sätt att möta de problem de respektive ländernas kommunsektorer har tampats med. En delambition har också varit att uppmärksamma forskning om förekomst och effekter av mellankommunala samarbeten, för att försöka utröna om det är ett alternativt (eller kompletterande) verktyg.

    Rapporten är skriven på uppdrag av Finansdepartementets kommunenhet, vid Avdelningen för offentlig förvaltning. Undertecknad, Gissur Ó Erlingsson, är projektledare och huvudförfattare. Johan Flemgård var under våren 2018 praktikant vid Centrum för kommunstrategiska studier och assisterade för detta projekt. Under sommaren enrollerades han som forskningsassistent. Hans insatser har mer än väl motiverat medförfattarskap. Johans ansvarsområde har varit materialinsamling liksom skrivande av avsnitten om de ingående ländernas kommunsystem.

    Vi vill här passa på att tacka Torkel Winbladh för kreativa råd och synpunkter under processens gång. Ulf Tynelius och Lisa Hörnström tackas för värdefulla inspel tidigt i arbetet. Under arbetsprocessen har några personer läst delar av manuskriptet. Vi vill här särskilt tacka Jacob Christensen, Gunnar Helgi Kristinsson, Peter Söderlund och Espen D. H. Olsen. Samtal om rapportens övergripande frågor med Eva Mörk och Lovisa Persson har bidragit till att höja kvaliteten på framför allt slutdiskussionen. Anni Martinsdottir ska tackas för att ha korrekturläst en tidig version av manuskriptet, och Anna Valentinsson ska ha ett enormt stort tack för korrektur-, layout- och stilinsatser i arbetets slutskede. Alla kvarstående fel och eventuella misstolkningar är givetvis våra egna.

    En kort not om stil: vi är möjligen överdrivet generösa med originalcitat i manuskriptet. Detta beror inte på lättja. Beslutet grundar sig att politik- och forskningsområdet vi går i clinch med är omgärdat av starka uppfattningar, präglat av normativa kontroverser och är därmed hett omdebatterat. Därför har vi månat om att just ha kvar centrala originalcitat i sitt originalspråk. Det minimerar risken för att vi i efterhand ska kunna beslås med att ha miss- eller övertolkat slutsatser i litteraturen.

    Slutligen är vi mycket ödmjuka inför det faktum att vi kan ha missat viktig grundforskning. Vi har haft en given tidsram för projektet och det är ett digert arbete att söka och sammanfatta forskning från 22 länder. Har nyckelreferenser missats är det olyckligt men givetvis inte medvetet. Vi kan bara beklaga om sådana missar föreligger. Med det sagt önskar vi trevlig läsning.

  • Faryna, Krzysztof Sebastian
    Linköping University, Department of Management and Engineering, Malmstens Linköping University.
    Cellulosalack– partiell bättring av lakuner på cellulosaytbehandlingar2018Independent thesis Basic level (degree of Bachelor), 10,5 credits / 16 HE creditsStudent thesis
    Abstract [en]

    The reason to write about cellulose lacquer is that from year to year there are more and more furniture withsuch transparent coatings that come to the conservation and restoration workshops. The furniture comesmainly from the 1950´s and 1960´s (when it was one of the most common type of transparent finishes) butalso from the 1920´s and 1930´s. Today the furniture from the 20th century has become antiques and soughtafter on the market. Therefore, they are still valuable with their original coatings that would need to be protectedand preserved.This type of transparent finishes causes many problems for the conservator, but I have concentratedon how to partially improve the lacunae that you can interpret here as a break in continuity, gaps in transparentcoatings (the word comes from Latin – lacuna, lacunae).Earlier, the most common method of restoring a furniture with damaged transparent coatings was toremove the old and add a whole new one. In modern times, it is obvious that it is not very environmentallyfriendly and healthy to clean up and add new nitrate cellulose laquer, with conservation attitude is better torepair old finishes that are original. One should learn how to handle such transparent coatings problems.Therefore, there is a need to find methods and materials that help fill gaps effectively. I have also evaluatedthem based on preserving and restoration ground rules.Through practical experiments, based on written sources as well as on my and my supervisors experiencein this area, I have presented and evaluated some methods of filling lacunae in my bachelor thesis.

  • Arques, Joakim
    Linköping University, Department of Mathematics, Mathematics and Applied Mathematics. Linköping University, Faculty of Science & Engineering.
    Den interaktiva skrivtavlans effekt på elevattityder i matematikundervisning: En litteraturstudie om elevers inställning till den interaktiva skrivtavlan2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna litteraturstudie var att undersöka vilken effekt den interaktiva skrivtavlan har på elevattityder. De fyra elevattityderna som identifieras definierades med hjälp av Tapias (1996, 2004) arbete med Attitudes Towards Mathematics Instrument (ATMI), och fokuserar på vad elever tycker och känner om matematik.

    Litteraturstudien visar att elevernas attityder mot matematiken påverkas av användandet av en interaktiv skrivtavla i matematikundervisningen. Studien visar att två av fyra attityder påverkas positivt av den interaktiva skrivtavlan, en attityd visade otydliga effekter, och en attityd visade på en för liten effekt för att tillåta några slutsatser.