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  • 1.
    Nilsson, Sara
    et al.
    Linköping University, Department of Management and Engineering, Manufacturing Engineering. Linköping University, Faculty of Science & Engineering.
    Jensen, Jonas
    Linköping University.
    Björkman, Mats
    Linköping University, Department of Management and Engineering, Manufacturing Engineering. Linköping University, Faculty of Science & Engineering.
    Sundin, Erik
    Linköping University, Department of Management and Engineering, Manufacturing Engineering. Linköping University, Faculty of Science & Engineering.
    11 Rules of Design for Manufacturing when Producing Pre-Impregnated Carbon Fiber-Reinforced Plastic Components: an Application at SAAB Aerostructures2016In: SAE Technical Papers, Society of Automotive Engineers, 2016, 1-8 p., 2016-01-2124Conference paper (Refereed)
    Abstract [en]

    Carbon ber-reinforced plastic (CFRP) is one of the most commonly used materials in the aerospace industry today. CFRP in pre- impregnated form is an anisotropic material whose properties can be controlled to a high level by the designer. Sometimes, these properties make the material hard to predict with regards to how the geometry affects manufacturing aspects. This paper describes eleven design rules originating from different guidelines that describe geometrical design choices and deals with manufacturability problems that are connected to them, why they are connected and how they can be minimized or avoided. Examples of design choices dealt with in the rules include double curvature shapes, assembly of uncured CFRP components and access for non-destructive testing (NDT). To verify the technical content and ensure practicability, the rules were developed by, inter alia, studying literature and performing case studies at SAAB Aerostructures. The research was done through a collaboration between Linköping University and SAAB Aerostructures in a state-funded project. This ensured a balanced approach between academic advancement and usefulness in commercial projects. 

  • 2.
    Jonsson, Stefan
    Linköping University, REMESO - Institute for Research on Migration, Ethnicity and Society. Linköping University, Department of Social and Welfare Studies. Linköping University, Faculty of Arts and Sciences.
    1ST BOOKS BY NEW SWEDISH PROSE WRITERS1987In: BLM-BONNIERS LITTERARA MAGASIN, ISSN 0005-3198, Vol. 56, no 1, 35-40 p.Article in journal (Other (popular science, discussion, etc.))
  • 3. Kälkner, Karl Mikael
    et al.
    Westlin, Jan-Erik
    Strang, Peter
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Biomedicine and Surgery, Palliative mediicin. Östergötlands Läns Landsting, ViN, LAH Linnea.
    89Strontium in the management of painful sceletal metastases2000In: Anticancer Research, ISSN 0250-7005, Vol. 20, no 2 B, 1109-1114 p.Article in journal (Refereed)
    Abstract [en]

    Purpose: To make a review of the literature of 89strontium-chloride and a retrospective study of time to palliative intended external irradiation number of portals and overall-survival after 89strontium-chloride therapy. Results: In total 93 patients were treated 116 times with 89strontium. The patients with prostatic carcinoma received 91% of all 89strontium therapies. Median over-all survival was 10 months after injection. In those cases when 89strontium was given before palliative radiotherapy, the average of total number of local fields was significantly lower (1.1 versus 4.1) compared to those cases where local fields preceded 89strontium therapy. However, time to 89new external irradiation after 89strontium injection was equal between these groups (3.8 versus 2.9 months). Conclusion:A review of literature conclude that 89strontium is effective for the reduction of pain originating from osteoblastic metastases. It also reduce the need for external radiotherapy and therefore is cost-effective. However, 89strontium is more effective in an early phase of the metastatic disease and preferably as an adjuvance to external radiotherapy.

  • 4.
    Mahmoud, Nawrous Ibrahim
    Linköping University, Department of Electrical Engineering.
    A Backstepping Design of a Control System for a Magnetic Levitation System2003Independent thesis Basic level (professional degree)Student thesis
    Abstract [en]

    The subject of this thesis is the design of a control law for a magnetic levitation system, which in this case is the system 33-210. The method used is backstepping technique and specifically adaptive observer backstepping due to parameter uncertainties and lack of access to all the states of the system. The second state of the system, the speed of the steel ball, was estimated by a reduced order observer. The model used gave us the opportunity to estimate a parameter which in the literature is denoted virtual control coefficient. Backstepping method gives us a rather straight forward way to design the controlling unit for a system with these properties. Stabilization of the closed-loop system is achieved by incorporating a Lypapunov function, which were chose a quadratic one in this thesis. If thederivative of this function is rendered negative definite by the control law, then we achieve stability. The results of the design were evaluated in simulations and real-time measurements by testing the tracking performance of the system. The simulation results were very promising and the validations in real-time were satisfying. Note that this has been done in previous studies; the new aspect here is the limitation of the voltage input. The real-time results showed that the parameter estimation converges only locally.

  • 5.
    Hu, Xiao-Li
    et al.
    Chinese Academy of Sciences, China.
    Schön, Thomas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Basic Convergence Result for Particle Filtering2007Report (Other academic)
    Abstract [en]

    The basic nonlinear filtering problem for dynamical systems is considered. Approximating the optimal filter estimate by particle filter methods has become perhaps the most common and useful method in recent years. Many variants of particle filters have been suggested, and there is an extensive literature on the theoretical aspects of the quality of the approximation. Still a clear cut result that the approximate solution, for unbounded functions, converges to the true optimal estimate as the number of particles tends to infinity seems to be lacking. It is the purpose of this contribution to give such a basic convergence result for a rather general class of unbounded functions. Furthermore, a general framework, including many of the particle filter algorithms as special cases, is given.

  • 6.
    Hu, Xiao-Li
    et al.
    Chinese Academy of Sciences, China.
    Schön, Thomas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Basic Convergence Result for Particle Filtering2007Report (Other academic)
    Abstract [en]

    The basic nonlinear filtering problem for dynamical systems is considered. Approximating the optimal filter estimate by particle filter methods has become perhaps the most common and useful method in recent years. Many variants of particle filters have been suggested, and there is an extensive literature on the theoretical aspects of the quality of the approximation. Still a clear cut result that the approximate solution, for unbounded functions, converges to the true optimal estimate as the number of particles tends to infinity seems to be lacking. It is the purpose of this contribution to give such a basic convergence result for a rather general class of unbounded functions. Furthermore, a general framework, including many of the particle filter algorithms as special cases, is given.

  • 7.
    Hu, Xiao-Li
    et al.
    China Jiliang University, China.
    Schön, Thomas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Basic Convergence Result for Particle Filtering2007In: Proceedings of the 7th IFAC Symposium on Nonlinear Control Systems, 2007, 288-293 p.Conference paper (Refereed)
    Abstract [en]

    The basic nonlinear filtering problem for dynamical systems is considered. Approximating the optimal filter estimate by particle filter methods has become perhaps the most common and useful method in recent years. Many variants of particle filters have been suggested, and there is an extensive literature on the theoretical aspects of the quality of the approximation. Still, a clear cut result that the approximate solution, for unbounded functions, converges to the true optimal estimate as the number of particles tends to infinity seems to be lacking. It is the purpose of this contribution to give such a basic convergence result.  

  • 8.
    Hu, Xiao-Li
    et al.
    Chinese Academy of Sciences, China.
    Schön, Thomas
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Basic Convergence Result for Particle Filtering2008In: IEEE Transactions on Signal Processing, ISSN 1053-587X, E-ISSN 1941-0476, Vol. 56, no 4, 1337-1348 p.Article in journal (Refereed)
    Abstract [en]

    The basic nonlinear filtering problem for dynamical systems is considered. Approximating the optimal filter estimate by particle filter methods has become perhaps the most common and useful method in recent years. Many variants of particle filters have been suggested, and there is an extensive literature on the theoretical aspects of the quality of the approximation. Still a clear-cut result that the approximate solution, for unbounded functions, converges to the true optimal estimate as the number of particles tends to infinity seems to be lacking. It is the purpose of this contribution to give such a basic convergence result for a rather general class of unbounded functions. Furthermore, a general framework, including many of the particle filter algorithms as special cases, is given.

  • 9.
    Corander, Jukka
    et al.
    Department of Mathematics, Åbo Akademi University, Åbo, Finland.
    Ekdahl, Magnus
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, The Institute of Technology.
    Koski, Timo
    Linköping University, Department of Mathematics, Mathematical Statistics . Linköping University, The Institute of Technology.
    A bayesian random fragment insertion model for de novo detection of DNA regulatory binding regions2007Manuscript (preprint) (Other academic)
    Abstract [en]

    Identification of regulatory binding motifs within DNA sequences is a commonly occurring problem in computationnl bioinformatics. A wide variety of statistical approaches have been proposed in the literature to either scan for previously known motif types or to attempt de novo identification of a fixed number (typically one) of putative motifs. Most approaches assume the existence of reliable biodatabasc information to build probabilistic a priori description of the motif classes. No method has been previously proposed for finding the number of putative de novo motif types and their positions within a set of DNA sequences. As the number of sequenced genomes from a wide variety of organisms is constantly increasing, there is a clear need for such methods. Here we introduce a Bayesian unsupervised approach for this purpose by using recent advances in the theory of predictive classification and Markov chain Monte Carlo computation. Our modelling framework enables formal statistical inference in a large-scale sequence screening and we illustrate it by a set of examples.

  • 10.
    Hasewinkel, Håkan
    Linköping University, Department of Computer and Information Science, MDALAB - Human Computer Interfaces. Linköping University, The Institute of Technology.
    A blueprint for using commercial games off the shelf in defence training, education and research simulations2006Licentiate thesis, monograph (Other academic)
    Abstract [en]

    There are two types of simulations, those made for business and those made for pleasure. The underlying technology is usually the same, the difference being how and for what purpose the simulation is used. Often the two purposes can be combined. Nowhere is this more obvious than in the mutual benefit that exists between the military community and the entertainment business. These mutual benefits have only in recent years begun to be seriously explored.

    The objective of this work is to explore how to modify and use commercial video games off the shelf, in defence training, education and research. The work focuses on the process of how and what to consider when modifying commercial off the shelf games for military needs.

    The outlined blueprint is based on studies performed with combatants from the Swedish Army. To facilitate the develop­ment of the blueprint, a great number of commercial games used by military communities around the world are evaluated. These evaluations, in harmony with literature in the area, are used to develop a basic theoretical framework. The basic theoretical framework characterizes the approach and style throughout the work.

    From a general point of view, there are two overall findings; first there is an urgent need for more intuitive, pedagogical and powerful tools for preparation, management and evaluation of game-based simulation, especially since the real learning often takes place during the modification process rather the during the playing session. Second, there is a defective understanding of the differences between and purposes of a defence simulation and a game. Defence simulations focus on actions and events, while video games focus on human reactions to actions and events. 

  • 11.
    Knutsson, Lena
    Linköping University, Department of Culture and Communication. Linköping University, Faculty of Arts and Sciences.
    A Blueprint for Women’s Fulfilment: A Reading of Three Novels in the Early Fiction of Margaret Drabble2008Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This essay will argue that Margaret Drabble has developed a pattern, that there is a blueprint for fulfilment in the life of the modern independent woman to be found inher early work. Three of Drabble's novels will be examined, moving from The Millstone(1965) and The Waterfall (1967), with their descriptions of two young heroines'pregnancies and lives with infant children, on to the more mature main character of TheRealms of Gold (1975). These three books form a chronology, both in regard to whenthey were written and, more importantly, to the different stages of a woman’s life thatthey represent. This will make it possible to see how Drabble perceives the demands ofsociety and different relationships influencing a woman's actions, her search foridentity, and the direction and fulfilment of her life. The pattern will be traced throughthree themes which are made visible in the novels in varying degrees. These are singlemotherhood and the role of the family, missing husbands and sexual fulfilment, andcareer and social interaction.The method is an analysis of the texts where the selected novels form the basis andstructure of the essay.

  • 12.
    Jonsson, Stefan
    Linköping University, REMESO - Institute for Research on Migration, Ethnicity and Society. Linköping University, Department of Social and Welfare Studies. Linköping University, Faculty of Arts and Sciences.
    A Brief History of the Masses: Three Revolutions2008Book (Refereed)
    Abstract [en]

    Stefan Jonsson uses three monumental works of art to build a provocative history of popular revolt: Jacques-Louis David's The Tennis Court Oath (1791), James Ensor's Christ's Entry into Brussels in 1889 (1888), and Alfredo Jaar's They Loved It So Much, the Revolution (1989). Addressing, respectively, the French Revolution of 1789, Belgium's proletarian messianism in the 1880s, and the worldwide rebellions and revolutions of 1968, these canonical images not only depict an alternative view of history but offer a new understanding of the relationship between art and politics and the revolutionary nature of true democracy.

    Drawing on examples from literature, politics, philosophy, and other works of art, Jonsson carefully constructs his portrait, revealing surprising parallels between the political representation of "the people" in government and their aesthetic representation in painting. Both essentially "frame" the people, Jonsson argues, defining them as elites or masses, responsible citizens or angry mobs. Yet in the aesthetic fantasies of David, Ensor, and Jaar, Jonsson finds a different understanding of democracy-one in which human collectives break the frame and enter the picture.

    Connecting the achievements and failures of past revolutions to current political issues, Jonsson then situates our present moment in a long historical drama of popular unrest, making his book both a cultural history and a contemporary discussion about the fate of democracy in our globalized world.

  • 13.
    Brenning, Nils
    et al.
    Royal Institute of Technology, Stockholm.
    Axnas, I
    Royal Institute of Technology, Stockholm.
    Raadu, M. A.
    Royal Institute of Technology, Stockholm.
    Lundin, Daniel
    Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
    Helmersson , Ulf
    Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology, Plasma and Coating Physics .
    A bulk plasma model for dc and HiPIMS magnetrons2008In: PLASMA SOURCES SCIENCE and TECHNOLOGY, ISSN 0963-0252 , Vol. 17, no 4, 045009- p.Article in journal (Refereed)
    Abstract [en]

    A plasma discharge model has been developed for the bulk plasma (also called the extended presheath) in sputtering magnetrons. It can be used both for high power impulse magnetron sputtering (HiPIMS) and conventional dc sputtering magnetrons. Demonstration calculations are made for the parameters of the HiPIMS sputtering magnetron at Link "oping University, and also benchmarked against results in the literature on dc magnetrons. New insight is obtained regarding the structure and time development of the currents, the electric fields and the potential profiles. The transverse resistivity eta(perpendicular to) has been identified as having fundamental importance both for the potential profiles and for the motion of ionized target material through the bulk plasma. New findings are that in the HiPIMS mode, as a consequence of a high value of eta(perpendicular to), (1) there can be an electric field reversal that in our case extends 0.01-0.04m from the target, (2) the electric field in the bulk plasma is typically an order of magnitude weaker than in dc magnetrons, (3) in the region of electric field reversal the azimuthal current is diamagnetic in nature, i.e. mainly driven by the electron pressure gradient, and actually somewhat reduced by the electron Hall current which here has a reversed direction and (4) the azimuthal current above the racetrack can, through resistive friction, significantly influence the motion of the ionized fraction of the sputtered material and deflect it sideways, away from the target and towards the walls of the magnetron.

  • 14.
    Höst, Gunnar E.
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Schönborn, Konrad J.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Lundin Palmerius, Karljohan
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    A Case-Based Study of Students' Visuohaptic Experiences of Electric Fields around Molecules: Shaping the Development of Virtual Nanoscience Learning Environments2013In: Education Research International, ISSN 2090-4002, E-ISSN 2090-4010, Vol. 2013, 194363Article in journal (Refereed)
    Abstract [en]

    Recent educational research has suggested that immersive multisensory virtual environments offer learners unique and exciting knowledge-building opportunities for the construction of scientific knowledge. This paper delivers a case-based study of students’ immersive interaction with electric fields around molecules in a multisensory visuohaptic virtual environment. The virtual architecture presented here also has conceptual connections to the flourishing quest in contemporary literature for the pressing need to communicate nanoscientific ideas to learners. Five upper secondary school students’ prior conceptual understanding of electric fields and their application of this knowledge to molecular contexts, were probed prior to exposure to the virtual model. Subsequently, four students interacted with the visuohaptic model while performing think-aloud tasks. An inductive and heuristic treatment of videotaped verbal and behavioural data revealed distinct interrelationships between students’ interactive strategies implemented when executing tasks in the virtual system and the nature of their conceptual knowledge deployed. The obtained qualitative case study evidence could serve as an empirical basis for informing the rendering and communication of overarching nanoscale ideas. At the time of composing this paper for publication in the current journal, the research findings of this study have been put into motion in informing a broader project goal of developing educational virtual environments for depicting nanophenomena.

  • 15.
    Desai, Avni
    et al.
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Widgren, Maria
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    A Collaboration in Product Service System for Telecom Networks: An "Orange and Ericsson case" study2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The purpose of the research is to study the “Orange and Ericsson case” while developing the method Actors and System Map. The interaction between actors within Ericsson’s Device Connection Platform is investigated in order to identify improvement opportunities in the interaction between the provider and the customer. To answer the purpose the following research questions was formulated:

    RQ1)  What type of actors may be involved in a telecom related IPSO?

    RQ2)  How can the connections between actors in the telecom related IPSO be illustrated?

    RQ3)  How can the Actors and System Map method be refined?

    In order to answer the research questions different methodologies were used for the analysing process. The research started with a widespread literature study to collect knowledge related to the area of Product Service System (PSS) and methodologies for identifying how actors interact with one another. Studying different mapping methods the conclusion was made that Actors and System Map was most suitable for this study.

    In the methodology background the previous selected method, Actors and System Map from an Integrated Product Service Offering (IPSO) perspective, was examined in order to be able to refine and improve the mapping method. Actors Map provides a visual and clear overview of the actors involved while a System Map shows the information flows and activities between the actors.

    To understand the interaction between the two companies, the definition of IPSO and the importance of value-based selling for a service offering are described in the theory background. Also, different ways of looking at a business model within the telecommunication industry is presented.

    Obtaining information regarding making an Actors Map and a System Map an improved mapping method was refined. The adaption of the method was divided into eight steps. The refined Actors Maps of the DCP shows the actors involved, how they are connected and their main assignments from each respondent’s point of view at Ericsson. The refined System Map shows what kind of information is transferred between the actors within the companies and between Orange and Ericsson. Both maps delivered as a decision basis will help identification of non-value giving links and non-optimal distances in the information flow for both companies.

  • 16.
    Maz´ya, Vladimir
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mathematics, Applied Mathematics.
    Shaposhnikova, Tatyana
    Linköping University, Department of Mathematics, Applied Mathematics. Linköping University, The Institute of Technology.
    A Collection of sharp dilation invariant integral inequalities for differentiable functions2008In: Sobolev Spaces in Mathematics I. Sobolev Type Inequalities / [ed] Vladimir Maz’ya, Berlin, Heidelberg: Springer , 2008, 223-248 p.Chapter in book (Other academic)
    Abstract [en]

    Presentation of new results on the latest topics of the theory of Sobolev spaces, partial differential equations, analysis and mathematical physics

    • The authors and editors are world-renowned specialists, working in different countries
    • Publication on the centenary of Sobolev’s birth with two short biographical articles and unique archive photos of S. Sobolev which have not yet been published in the English-language literature

    This volume is dedicated to the centenary of the outstanding mathematician of the XXth century Sergey Sobolev and, in a sense, to his celebrated work On a theorem of functional analysis published in 1938, exactly 70 years ago, where the original Sobolev inequality was proved. This double event is a good case to gather experts for presenting the latest results on the study of Sobolev inequalities which play a fundamental role in analysis, the theory of partial differential equations, mathematical physics, and differential geometry. In particular, the following topics are discussed: Sobolev type inequalities on manifolds and metric measure spaces, traces, inequalities with weights, unfamiliar settings of Sobolev type inequalities, Sobolev mappings between manifolds and vector spaces, properties of maximal functions in Sobolev spaces, the sharpness of constants in inequalities, etc. The volume opens with a nice survey reminiscence My Love Affair with the Sobolev Inequality by David R. Adams.

  • 17.
    Johansson, Kajsa
    et al.
    Linköping University, Department of Medicine and Health Sciences, Physiotherapy. Linköping University, Faculty of Health Sciences.
    Öberg, Birgitta
    Linköping University, Department of Medicine and Health Sciences, Physiotherapy. Linköping University, Faculty of Health Sciences.
    Adolfsson, Lars
    Linköping University, Department of Clinical and Experimental Medicine, Orthopaedics and Sports Medicine . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Orthopaedic Centre, Department of Orthopaedics Linköping.
    Foldevi, Mats
    Linköping University, Department of Medicine and Health Sciences. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Local Health Care Services in Central Östergötland, Central County Primary Health Care.
    A combination of systematic review and clinicians’ beliefs in interventions for subacromial pain2002In: British Journal of General Practice, ISSN 0960-1643, Vol. 52, no 475, 145-152 p.Article in journal (Refereed)
    Abstract [en]

    The aim of the study is to determine which treatments for patients with subacromial pain are trusted by general practitioners (GPs) and physiotherapists, and to compare trusted treatments with evidence from a systematic critical review of the scientific literature. A two-step process was used: a questionnaire (written case simulation) and a systematic critical review. The questionnaire was mailed to 18 GPs and 71 physiotherapists in Sweden. The total response rate was 72% (186/259). The following treatments were trusted: ergonomics/adjustments at work, corticosteroids, non-steroidal anti-inflamatory drugs, movement exercises, acupuncture, ultrasound therapy, strengthening exercises, stretching, transcutaneous electric nerve stimulation, and superficial heat or ice therapy. The review, including efficacy studies for the treatments found to be trusted, was conducted using the CINAHL, EMBASE and MEDLINE databases. Evidence for efficacy was recorded in relation to methodological quality and to diagnostic criteria that labelled participants as having subacromial pain or a non-specific shoulder disorder. Forty studies were included. The methodological quality varied and only one treatment had definitive evidence for efficacy for non-specific patients, namely injection of corticosteroids. The trust in corticosteroids, injected in the subacromial bursa, was supported by definitive evidence for short-term efficacy. Acupuncture had tentative evidence for short-term efficacy in patients with subacromial pain. Ultrasound therapy was ineffective for subacromial pain. This is supported by tentative evidence and, together with earlier reviews, this questions both the trust in the treatment and its use. The clinicians' trust in treatments had a weak association with available scientific evidence.

  • 18.
    Schötz, Susanne
    et al.
    Humanities Lab, Centre for Languages and Literature, Lund, Sweden.
    Eklund, Robert
    Linköping University, Department of Computer and Information Science, NLPLAB - Natural Language Processing Laboratory. Linköping University, The Institute of Technology.
    A comparative acoustic analysis of purring in four cats2011In: Proceedings from Fonetik 2011, Quarterly Progress and Status Report TMH-QPSR, Volume 51, 2011, Stockholm: Universitetsservice , 2011, 5-8 p.Conference paper (Other academic)
    Abstract [en]

    This paper reports results from a comparative analysis of purring in four domesticcats. An acoustic analysis describes sound pressure level, duration, number ofcycles and fundamental frequency for egressive and ingressive phases. Significantindividual differences are found between the four cats in several respects.

  • 19.
    Eklund, Robert
    et al.
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Peters, Gustav
    Forschungsmuseum Alexander Koenig, Bonn, Germany.
    Weise, Florian
    N/a’an ku sê Foundation, Windhoek, Namibia.
    Munro, Stuart
    N/a’an ku sê Foundation, Windhoek, Namibia.
    A comparative acoustic analysis of purring in four cheetahs2012In: Proceedings from FONETIK 2012 / [ed] Åsa Abelin and Anders Eriksson, Gothenburg: University of Gothenburg , 2012, 41-44 p.Conference paper (Other academic)
    Abstract [en]

    This paper reports results from a comparativeanalysis of purring in four tame cheetahs. Theresults exhibited individual variation forrelative phase duration and number of cyclesper phase, while egressive phases were louderand had higher fundamental frequency in allfour cheetahs.

  • 20.
    Eklund, Robert
    et al.
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Peters, Gustav
    Forschungsmuseum Alexander Koenig, Bonn, Germany.
    A comparative acoustic analysis of purring in juvenile, subadult and adult cheetahs2013In: Proceedings of Fonetik 2013 The XXVIth Annual Phonetics Meeting, 12-13 June 2013, Linköping University, Linköping, Sweden / [ed] Robert Eklund, Linköping: Linköping University Electronic Press, 2013, 25-28 p.Conference paper (Other academic)
    Abstract [en]

    Previous studies of cheetah purring havedescribed purring in adult cheetahs. This paperextends the cheetah purring research to includejuvenile and subadult cheetahs and analyzespurring data from cheetahs in ages rangingfrom 7 months to 7 years, and with weightsranging from 18 kilos to over 70 kilos. Resultsshow that while there is considerable variationacross most parameters analysed (amplitude,phase duration, cycles per phase andfundamental frequency), mainly attributable todegree of relaxation/agitation, previouslyreported observations that ingressive phasestend to be lower in frequency are largelyconfirmed, with one notable exception.

  • 21.
    Eilertsen, Gabriel
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Mantiuk, R. K.
    University of Cambridge, England.
    Unger, Jonas
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    A comparative review of tone-mapping algorithms for high dynamic range video2017In: Computer graphics forum (Print), ISSN 0167-7055, E-ISSN 1467-8659, Vol. 36, no 2, 565-592 p.Article in journal (Refereed)
    Abstract [en]

    Tone-mapping constitutes a key component within the field of high dynamic range (HDR) imaging. Its importance is manifested in the vast amount of tone-mapping methods that can be found in the literature, which are the result of an active development in the area for more than two decades. Although these can accommodate most requirements for display of HDR images, new challenges arose with the advent of HDR video, calling for additional considerations in the design of tone-mapping operators (TMOs). Today, a range of TMOs exist that do support video material. We are now reaching a point where most camera captured HDR videos can be prepared in high quality without visible artifacts, for the constraints of a standard display device. In this report, we set out to summarize and categorize the research in tone-mapping as of today, distilling the most important trends and characteristics of the tone reproduction pipeline. While this gives a wide overview over the area, we then specifically focus on tone-mapping of HDR video and the problems this medium entails. First, we formulate the major challenges a video TMO needs to address. Then, we provide a description and categorization of each of the existing video TMOs. Finally, by constructing a set of quantitative measures, we evaluate the performance of a number of the operators, in order to give a hint on which can be expected to render the least amount of artifacts. This serves as a comprehensive reference, categorization and comparative assessment of the state-of-the-art in tone-mapping for HDR video.

  • 22.
    Eklund, Robert
    Telia Research AB, Farsta Sweden.
    A Comparative Study of Disfluencies in Four Swedish Travel Dialogue Corpora1999In: Proceedings of Disfluency in Spontaneous Speech Workshop, 1999, 3-6 p.Conference paper (Refereed)
    Abstract [en]

    This paper reports on ongoing work on disfluencies carried out at Telia Research AB. Four travel dialogue corpora are described: human–"machine"–human (Wizard-of-Oz); human–“machine” (Wizard-of-Oz); human–human and human–machine. The data collection methods are outlined and their possible influence on the collected material is discussed. An annotation scheme for disfluency labelling is described. Preliminary results on five different kinds of disfluencies are presented: filled and unfilled pauses, prolonged segments, truncations and explicit editing terms.

  • 23.
    Östberg, Gustav
    Linköping University, Department of Electrical Engineering.
    A Comparative Study of Efficient Power Amplifiers in CMOS2008Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    During later years communication schemes for handheld devices have increased in complexity due to the desire to increase the throughput, i.e. the amount of information sent over a medium simultaneously. Increasing throughput can be accomplished, not only by modulating the phase or frequency, but also the amplitude. This leads to tougher requirements on the power amplifier. The conventional power amplifiers, which have the ability to follow the envelope of the carrier, are inefficient. This thesis aims to compare two old but revived architectures which exploit high-efficiency amplifiers and still have a linear relationship between the input and output. The architectures; the Polar Linearization Technique and Outphasing share the same foundation. Based on literature, the polar technique have been more successful of employing examples fufilling communication standards. The polar technique is also more versatile regarding power combiners, distortion correction and alternative implementations. The simulations performed in this thesis results show that the polar amplifier is less sensitive to process variations and has higher maximum efficiency. On the other hand, the outphasing topology have the highest linearity figures.

  • 24.
    Eklund, Robert
    Telia Research AB, Spoken Language Processing, Haninge, Sweden.
    A Comparative Study of Focus Realization in Three Swedish Dialects1996In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 99, no 4, 2492-2492 p.Article in journal (Refereed)
    Abstract [en]

    State-of-the-art speech recognition and speech translation systems do not currently make use of prosodic information. Utterances often have one or more constituents semantically focused by prosodic means and detection of the focus/foci of anutterance is crucial for a correct interpretation of the speech signal. Thus, a semantic model of focus should be linked to a model describing the acoustic-phonetic correlates of the speech. However, variability exists at both the semantic and the prosodic ends. Semantically different kinds of foci might be associated with specific prosodic gestures. Also, a semantically specific type of focus might be realised indifferent ways in different varieties of a given language since general intonational patterns vary between dialects. In this paper, focus realisation in three different dialects of Swedish is investigated. Subjects from Stockholm, Gšteborg and Malmšö recorded three sets of four sentences where focus was systematically put on four different constituents by having the subjects answer wh-questions. Since Swedish is a language with two tonal accents, words with these accents both in and out of focus were included. Dialectal as well as individual variation in focus realisation is described with emphasis on invariant and optional phenomena.

  • 25.
    Autio, Erkko
    et al.
    London Business School.
    Klofsten, Magnus
    Linköping University, Department of Management and Engineering, Project management, Innovations and Entrepreneurship . Linköping University, The Institute of Technology.
    A comparative study of two European business incubators1998In: Journal of small business management (Print), ISSN 0047-2778, E-ISSN 1540-627X, Vol. 36, no 1, 30-43 p.Article in journal (Refereed)
    Abstract [en]

    The aim of this article is to contribute to the literature on the management of SME support arrangements, such as new business incubation programs, by presenting two European case studies of such arrangements. In the case studies, we have tried to identify management practices that seem to work well in both cases. The literature abounds with "success stories" of for example individual science parks but such stories tend to have two major shortcomings. First, what constitutes success is seldom defined. Second, it is difficult to determine to what degree this success depends on local factors and to what degree it can be attributed to the management practices of the support arrangement. This study discusses the management practices of these two arrangements against the background of their regional settings.

  • 26.
    Welin, Erik
    Linköping University, Department of Management and Economics.
    A Comparison between the Swedish 3G Beauty Contest and the UK 3G Auction2006Independent thesis Advanced level (degree of Magister), 10 points / 15 hpStudent thesis
    Abstract [en]

    This thesis compares the two different version of public franchise bidding for awarding 3G licenses used in Sweden and the UK, respectively a beauty contest and an auction. The fact is that the Swedish beauty contest has failed to tackle many of the problems discussed in connection with public franchise bidding in an effective way. Sweden has first of all had problems with enforcing the ambitious coverage criteria. The UK has on the other hand succeeded in tackling the problems and raised governmental revenue of £22.5bn through the auction.

    The conclusion is that this thesis confirms the existing literatures’ critique of the Swedish beauty contest. However, this thesis also provides a new perspective to the existing literature. The main conclusion is that the auction has locked the prices at a high level and externalised negative price and investments effects through the international operators’ behaviour onto consumers in other countries.

  • 27.
    Bell, Linda
    et al.
    Centre for Speech Technology, Royal Institute of Technology, Stockholm, Sweden.
    Eklund, Robert
    Linköping University, Department of Computer and Information Science, NLPLAB - Natural Language Processing Laboratory. Linköping University, The Institute of Technology. Telia Research AB, Farsta, Sweden.
    Gustafson, Joakim
    Centre for Speech Technology, Royal Institute of Technology, Stockholm, Sweden.
    A Comparison of Disfluency Distribution in a Unimodal and a Multimodal Human–Machine Interface2000In: Proceedings of ICSLP’ 00, 2000, Vol. 3, 626-629 p.Conference paper (Refereed)
    Abstract [en]

    In this paper, we compare the distribution of disfluencies intwo human–computer dialogue corpora. One corpus consistsof unimodal travel booking dialogues, which were recorded over the telephone. In this unimodal system, all components except the speech recognition were authentic. The other corpus was collected using a semi-simulated multi-modal dialogue system with an animated talking agent and a clickable map. The aim of this paper is to analyze and discuss the effects of modality, task and interface design on the distribution and frequency of disfluencies in these twocorpora.

  • 28.
    Pereira Caldas, Célia
    et al.
    Nursing Faculty, Rio de Janeiro State University, Brazil .
    Berterö, Carina
    Linköping University, Department of Medical and Health Sciences, Nursing Science. Linköping University, Faculty of Health Sciences.
    A Concept Analysis About Temporality and Its Applicability in Nursing Care2012In: Nursing Forum, ISSN 0029-6473, Vol. 47, no 4, 245-252 p.Article in journal (Refereed)
    Abstract [en]

    Topic: Concept analysis of temporality. Purpose: To develop a comprehensive definition of temporality applicable to nursing care. Source: Published literature. Conclusions: Temporality is a central component of our experience of the world. Phenomena such as the passage of time, time cycles, the trajectory of aging, transitions toward something, something being, and life as a limited time are integral to human experience. Temporality could be seen as lived time, and as such it is subjective time as opposed to clock time or objective time. The temporal dimensions of past, present, and future constitute the perspective of a persons temporal world. © 2012 Wiley Periodicals, Inc.

  • 29.
    Wenchert, Jonn
    Linköping University, Department of Management and Engineering, Logistics & Quality Management.
    A Contemporary Six Sigma and Lean Integration: Towards the Ideal State2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    A new reality, where human labor is replaced by automated machines is causing production management to rethink how they can steer the production to meet their customers demand. There is a gap of values, techniques and tools to communicate with the processes existing in the new modern factories, where data sometimes is the single output. This thesis purpose was to develop a model out of Lean and Six Sigma, as an answer to how modern factory could work with an information system, reaching the ideal state.

     

    Through a theoretical analysis, Lean and Six Sigma differences in values, techniques and tools were weighted by the ideal state and recommendations from literature. Through a unstructured interview and system design review with a logistic group at a Swedish Modern Factory (SMF) a concept of an information system was developed. A project to test the model was initialized, where Define, Measure and Analyze phase was conducted. The model was thereafter modified from the projects implications.

     

    The result was a Lean Six Sigma model which values are customer focus, ideal state, result orientation, committed leadership, education and involvement. The technique follow a DMAIC cycle and continuous improvements through a current to future state approach. The used techniques were considered Six Sigma heavy, where Leans principles are considered into the models values. The information system supports the model in setting the processes of the factory in either stability or potential state, where they differ in Measure and Analyze phase. The test at SMF developed several assignable causes to variation on the component As lead time. The model adapted after the test to involve a Measurement System Analysis (MSA), before setting the next current state of the process.

  • 30.
    Spiegler, Virginia L M
    et al.
    Cardiff University, Wales .
    Naim, Mohamed M
    Cardiff University, Wales .
    Wikner, Joakim
    Linköping University, Department of Management and Engineering, Production Economics. Linköping University, The Institute of Technology.
    A control engineering approach to the assessment of supply chain resilience2012In: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 50, no 21, 6162-6187 p.Article in journal (Refereed)
    Abstract [en]

    There is no consensus on the supply chain management definition of resilience. To aid in evaluating the dynamic behaviour of such systems we need to establish clearly elucidated performance criteria that encapsulate the attributes of resilience. A literature review establishes the latter as readiness, responsiveness and recovery. We also identify robustness as a necessary condition that would complement resilience. We find that the Integral of the Time Absolute Error (ITAE) is an appropriate control engineering measure of resilience when it is applied to inventory levels and shipment rates. We use the ITAE to evaluate an often used benchmark model of make-to-stock supply chains consisting of three decision parameters. We use both linear and nonlinear forms of the model in our evaluation. Our findings suggest that optimum solutions for resilience do not yield a system that is robust to uncertainties in lead-time. Hence supply chains will experience drastic changes in their resilience performance when lead-time changes.

  • 31.
    Huq, Rizwan-ul
    Linköping University.
    A Conversation Analytic Look at Understanding and Meaning Making During Group Work Interaction2010Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The study aims at the understanding of the meaning-building process during a group work interaction of tertiary-level students. The article highly emphasizes on the fact that meaning evolves through the interaction of the people, whether verbal or non-verbal, and the group work interaction substantiates the meaning-building process quite emphatically as the interaction is quite intensive and peer-centered. In the way to understand the meaning-making, the study has focused its concentration on turn-taking procedures of the participants as well as the materialization of their competence.

  • 32.
    Ohlsson, Henrik
    et al.
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Convex Approach to Subspace Clustering2011In: Proceedings of the 50th IEEE Conference on Decision and Control, 2011, 1467-1472 p.Conference paper (Refereed)
    Abstract [en]

    The identification of multiple affine subspaces from a set of data is of interest in fields such as system identification, data compression, image processing and signal processing and in the literature referred to as subspace clustering. If the origin of each sample would be known, the problem would be trivially solved by applying principal component analysis to samples originated from the same subspace. Now, not knowing what samples that originates from what subspace, the problem becomes considerably more difficult. We present a novel convex formulation for subspace clustering. The proposed method takes the shape of a least-squares problem with sum-of-norms regularization over optimization parameter differences, a generalization of the ℓ1-regularization. The regularization constant is used to trade off fit and the identified number of affine subspaces.

  • 33.
    Lyzell, Christian
    et al.
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Andersen, Martin
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    Enqvist, Martin
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Convex Relaxation of a Dimension Reduction Problem Using the Nuclear Norm2012In: Proceedings of the 51st IEEE Conference on Decision and Control, 2012, 2852-2857 p.Conference paper (Refereed)
    Abstract [en]

    The estimation of nonlinear models can be a challenging problem, in particular when the number of available data points is small or when the dimension of the regressor space is high. To meet these challenges, several dimension reduction methods have been proposed in the literature, where a majority of the methods are based on the framework of inverse regression. This allows for the use of standard tools when analyzing the statistical properties of an approach and often enables computationally efficient implementations. The main limitation of the inverse regression approach to dimension reduction is the dependence on a design criterion which restricts the possible distributions of the regressors. This limitation can be avoided by using a forward approach, which will be the topic of this paper. One drawback with the forward approach to dimension reduction is the need to solve nonconvex optimization problems. In this paper, a reformulation of a well established dimension reduction method is presented, which reveals the structure of the optimization problem, and a convex relaxation is derived.

  • 34.
    Järvinen, Johanna
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Ylinenpää, Emmelié
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    A Coopetitive situation and its effects on knowledge sharing: A single-case study on actors in coopetitive relationships2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Coopetition literature has been given a lot of interest in recent years but research on coopetition on the individual level of analysis and its effects on employees are scarce.The aim of the thesis is to indicate how coopetitive situations in coopetitive environments affect individual employees and knowledge sharing between them. From our findings, we found that coopetitive situations affect individual level knowledge sharing in two stages. First, individuals' attitudes towards knowledge sharing are influenced by the actor's position as either cooperative or competitive dominant. Ultimately, regardless of the actor's position, the choice to share knowledge is affected by the type of knowledge, by individual factors and by organizational factors. 

  • 35.
    Feiz, Roozbeh
    et al.
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Fenton, Paul
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Frändegård, Per
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Johansson, Nils
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Kanda, Wisdom
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Matschewsky, Johannes
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Mejía Dugand, Santiago
    Päivärinne, Sofia
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    Wallsten, Björn
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, Faculty of Science & Engineering.
    A corridor striving for sustainability - Reflecting upon PhD education at a Swedish University2015Conference paper (Other academic)
    Abstract [en]

    In this paper, we present an overview of interdisciplinary research from Ph.D. students working at the Division of Environmental Technology and Management at Linköping University, Sweden. Each of the Ph.D. students addresses the overall challenge of sustainability transitions in their research, although the themes and content of research varies considerably between individuals, encompassing research on actors, networks, products, materials, services and systems from the public and private sector, operating locally, regionally, nationally and internationally. The scientific literature and methods used to frame and conduct studies varies considerably within the group, as does the individual focus on immediate issues of sustainability.

  • 36.
    Felsberg, Michael
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
    Forssén, Per-Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
    Moe, Anders
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
    Granlund, Gösta
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
    A COSPAL Subsystem: Solving a Shape-Sorter Puzzle2005In: AAAI Fall Symposium: From Reactive to Anticipatory Cognitive Embedded Systems, FS-05-05, AAAI Press , 2005, 65-69 p.Conference paper (Refereed)
    Abstract [en]

     To program a robot to solve a simple shape-sorter puzzle is trivial. To devise a Cognitive System Architecture, which allows the system to find out by itself how to go about a solution, is less than trivial. The development of such an architecture is one of the aims of the COSPAL project, leading to new techniques in vision based Artificial Cognitive Systems, which allow the development of robust systems for real dynamic environments. The systems developed under the project itself remain however in simplified scenarios, likewise the shape-sorter problem described in the present paper. The key property of the described system is its robustness. Since we apply association strategies of local features, the system behaves robustly under a wide range of distortions, as occlusion, colour and intensity changes. The segmentation step which is applied in many systems known from literature is replaced with local associations and view-based hypothesis validation. The hypotheses used in our system are based on the anticipated state of the visual percepts. This state replaces explicit modeling of shapes. The current state is chosen by a voting system and verified against the true visual percepts. The anticipated state is obtained from the association to the manipulator actions, where reinforcement learning replaces the explicit calculation of actions. These three differences to classical schemes allow the design of a much more generic and flexible system with a high level of robustness. On the technical side, the channel representation of information and associative learning in terms of the channel learning architecture are essential ingredients for the system. It is the properties of locality, smoothness, and non-negativity which make these techniques suitable for this kind of application. The paper gives brief descriptions of how different system parts have been implemented and show some examples from our tests.

  • 37.
    Kjellman, Görel
    et al.
    Linköping University, Department of Department of Health and Society, Division of Physiotherapy. Linköping University, Faculty of Health Sciences.
    Skargren, Elisabeth
    Linköping University, Department of Department of Health and Society, Division of Physiotherapy. Linköping University, Faculty of Health Sciences.
    Öberg, Birgitta
    Linköping University, Department of Department of Health and Society, Division of Physiotherapy. Linköping University, Faculty of Health Sciences.
    A critical analysis of randomised clinical trials on neck pain and treatment efficacy: A review of the literature1999In: Scandinavian Journal of Rehabilitation Medicine, ISSN 0036-5505, Vol. 31, no 3, 139-152 p.Article in journal (Refereed)
    Abstract [en]

    The efficacy of physiotherapy or chiropractic treatment for patients with neck pain was analysed by reviewing 27 randomised clinical trials published 1966-1995. Three different methods were employed: systematic analyses of; methodological quality; comparison of effect size; analysis of inclusion criteria, intervention and outcome according to The Disablement Process model. The quality of most of the studies was low; only one-third scored 50 or more of a possible 100 points. Positive outcomes were noted for 18 of the investigations, and the methodological quality was high in studies using electromagnetic therapy, manipulation, or active physiotherapy. High methodological quality was also noted in studies with traction and acupuncture, however, the interventions had either no effect or a negative effect on outcome. Pooling data and calculation of effect size showed that treatments used in the studies were effective for pain, range of motion, and activities of daily living. Inclusion criteria, intervention, and outcome were based on impairment in most of the analysed investigations. Broader outcome assessments probably would have revealed relationships between treatment effect and impairment, functional limitation and disability.

  • 38.
    Englund, Rickard
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Kottravel, Sathish
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Science & Engineering.
    Ropinski, Timo
    Visual Computing Research Group, Ulm University.
    A Crowdsourcing System for Integrated and Reproducible Evaluation in Scientific Visualization2016In: 2016 IEEE Pacific Visualization Symposium (PacificVis), IEEE Computer Society, 2016, 40-47 p.Conference paper (Refereed)
    Abstract [en]

    User evaluations have gained increasing importance in visualization research over the past years, as in many cases these evaluations are the only way to support the claims made by visualization researchers. Unfortunately, recent literature reviews show that in comparison to algorithmic performance evaluations, the number of user evaluations is still very low. Reasons for this are the required amount of time to conduct such studies together with the difficulties involved in participant recruitment and result reporting. While it could be shown that the quality of evaluation results and the simplified participant recruitment of crowdsourcing platforms makes this technology a viable alternative to lab experiments when evaluating visualizations, the time for conducting and reporting such evaluations is still very high. In this paper, we propose a software system, which integrates the conduction, the analysis and the reporting of crowdsourced user evaluations directly into the scientific visualization development process. With the proposed system, researchers can conduct and analyze quantitative evaluations on a large scale through an evaluation-centric user interface with only a few mouse clicks. Thus, it becomes possible to perform iterative evaluations during algorithm design, which potentially leads to better results, as compared to the time consuming user evaluations traditionally conducted at the end of the design process. Furthermore, the system is built around a centralized database, which supports an easy reuse of old evaluation designs and the reproduction of old evaluations with new or additional stimuli, which are both driving challenges in scientific visualization research. We will describe the system's design and the considerations made during the design process, and demonstrate the system by conducting three user evaluations, all of which have been published before in the visualization literature.

  • 39.
    Ørum, Tania
    et al.
    Köpenhamns universitet.
    Olsson, JesperLinköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    A cultural history of the Avant-Garde in the nordic countries 1950–19752016Collection (editor) (Other academic)
  • 40.
    Tlostanova, Madina
    Linköping University, Department of Thematic Studies, The Department of Gender Studies. Linköping University, Faculty of Arts and Sciences.
    A decolonial view of Baltic Drama.: Countering postcolonial narratives2016In: Baltic Worlds, ISSN 2000-2955, Vol. IX, no 3, 83-86 p.Article, book review (Other academic)
  • 41.
    Plejert, Charlotta
    et al.
    Linköping University, Department of Culture and Communication, Language and Culture. Linköping University, Faculty of Arts and Sciences.
    Sundqvist, Anett
    Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences.
    A dialogical approach to Theory of Mind in aided and non-aided child interaction2013In: Aided Communication in Everyday Interaction / [ed] Niklas Norén, Christina Samuelsson and Charlotta Plejert, Guildford: J & R Press , 2013, 153-187 p.Chapter in book (Other academic)
  • 42.
    Liljegren, Lars
    Linköping University, Department of Culture and Communication, Modern Languages. Linköping University, Faculty of Arts and Sciences.
    A Different Strindberg: The Power of the Panopticon and the Image of Strindberg in Married (1913)2016In: Norm-Focused and Culture-Related Inquiries in Translation Research: Selected Papers of the CETRA Research Summer School 2014 / [ed] Giczela-Pastwa, Justyna and Uchenna Oyali, Frankfurt am Main: Peter Lang Publishing Group, 2016, 143-156 p.Chapter in book (Refereed)
  • 43.
    Pakiam, Barbro
    Linköping University, Department of Language and Culture. Linköping University, Faculty of Arts and Sciences.
    ˜A œdilemma of choice in Doris Lessing's The summer before the dark and Anita Brookner's Hotel du Lac1997Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In the first chapter (Pre-dilemma) a study of the main characters will be made referring to the impending expectation of crisis conveyed by the authors. This chapter will also deal with the possible influences that inspire a change of mind, since choice has to do with change. The second chapter (Dilemma) will then focus on the aspects of the dilemma itself, firstly in The Summer before the Dark and secondly in Hotel du Lac. Imagery being the most delicate and yet the most powerful instrument in the art of literature, whether used to convey settings or internal conflict, the aim of the second chapter is to illuminate the imagery involved to highlight the emotional stages leading up to a dilemma of choice. How the dilemma is resolved in both novels will also be considered he re along with various speculations regarding the evaluation of the final choice where the commentaries of different critics will be compared.

  • 44.
    Eriksson Barajas, Katarina
    Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    A discursive reception study  of fiction2012Conference paper (Other academic)
    Abstract [en]

    The aim of the proposed paper is to increase the knowledge on fiction in use. A combination of reader reception studies (cf. Fish, 1980) and discursive psychology (Edwards & Potter, 1992), which I would like to call discursive reception studies (Eriksson & Aronsson, 2009): that is, a discursive-psychological analysis of reader-reception data is used in the paper. Such approach provides possibilities to analyse the role of social interaction in the co-construction of the experience of a film or a play (or the reading of a book). Drawing on detailed analyses of video-recorded pair or group conversations before, during and after the viewing of a stage play or a film, empirically-driven research questions will be addressed: f ex How is fiction used to create ourselves and position each other, to be seen as smart or well-informed, as being part of the cultural elite or as not high-brow? How is talk about fiction used to quarrel, flirt, tie bonds of friendship et cetera? To analyse talk about fiction as interaction makes it possible to understand the potential of action in interpretation of fiction contains, the participants in a conversation around a play or a film do not only report their reading of the piece, they also use their interpretation in social interaction. Hereby, it becomes possible to analyse how readings of fictive stories are created in social interaction and how they are used for different purposes. Hence, the knowledge on fictive characters becomes more dynamic.

    Data from conversations after seeing Shakespeare’s play Romeo & Juliette and films as One Day, Jane Eyre, Real Steel and Arrietty the Borrower is analysed in the paper.

  • 45.
    Bednarski, Andrzej
    Linköping University, Department of Computer and Information Science, PELAB - Programming Environment Laboratory. Linköping University, The Institute of Technology.
    A dynamic programming approach to optimal retargetable code generation for irregular architectures2002Licentiate thesis, monograph (Other academic)
    Abstract [en]

    In this thesis we address the problem of optimal code generation for irregular architectures such as Digital Signal Processors (DSPs). Code generation consists mainly of three tasks: instruction selection, instruction scheduling and register allocation. These tasks have been discovered to be NP-difficult for most of the architectures and most situations.

    A common approach to code generation consists in solving each task separately, i.e. in a decoupled manner, which is easier from an engineering point of view. Decoupled phase based compilers produce good code quality for regular architectures, but if applied to DSPs the resulting code is of significantly lower performance due to strong interdependencies between the different tasks.

    We report on a novel method for fully integrated code generation based on dynamic programming. It handles the most important tasks of code generation in a single optimization step and produces optimal code sequence. Our dynamic programming algorithm is applicable to small, yet not trivial problem instances with up to 50 instructions per basic block if data locality is not an issue, and up to 20 instructions if we take data locality on irregular processor architectures into account.

    In order to obtain a retargetable framework we developed a first version of a structured hardware description language, ADML, which is based on XML. We implemented a prototype framework of such a retargetable system for optimal code generation.

    As far as we know from the literature, this is the first time that the main tasks of code generation are solved optimally in a single and fully integrated optimization step that additionally considers data placement in registers. 

  • 46.
    Jansson, Jonas
    et al.
    The Swedish National Road and Transport Research Institute, Sweden.
    Gustafsson, Fredrik
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Framework and Automotive Application of Collision Avoidance Decision Making2008In: Automatica, ISSN 0005-1098, Vol. 44, no 9, 2347-2351 p.Article in journal (Refereed)
    Abstract [en]

    Collision avoidance (CA) systems are applicable for most transportation systems ranging from autonomous robots and vehicles to aircraft, cars and ships. A probabilistic framework is presented for designing and analyzing existing CA algorithms proposed in literature, enabling on-line computation of the risk for faulty intervention and consequence of different actions. The approach is based on Monte Carlo techniques, where sampling-resampling methods are used to convert sensor readings with stochastic errors to a Bayesian risk. The concepts are evaluated using a real-time implementation of an automotive collision mitigation system, and results from one demonstrator vehicle are presented.

  • 47. Whitaker, Ross
    et al.
    Breen, David
    Museth, Ken
    Linköping University, Department of Science and Technology, Digital Media. Linköping University, The Institute of Technology.
    Soni, N
    A framework for Level Set segmentation of volumetric datasets2001In: IEEE Volume Graphics 01,2001, 2001, 159- p.Conference paper (Refereed)
    Abstract [en]

    This paper presents a framework for extracting surface models from a broad variety of volumetric datasets. These datasets are produced from standard 3D imaging devices, and are all noisy samplings of complex biological structures with boundaries that have low and often varying contrasts. The level set segmentation method, which is well documented in the literature, creates a new volume from the input data by solving an initial-value partial differential equation (PDE) with user-defined feature-extracting terms. Given the local/global nature of these terms, proper initialization of the level set algorithm is extremely important. Thus, level set deformations alone are not sufficient, they must be combined with powerful initialization techniques in order to produce successful segmentations. Our level set segmentation approach consists of defining a set of suitable pre-processing techniques for initialization and selecting /tuning different feature-extracting terms in the level set algorithm. This collection of techniques forms a toolkit that can be applied, under the guidance of a user, to segment a variety of volumetric data. Users can combine these methods in different ways and thereby access a wide range of functionalities, several of which are described in this paper and demonstrated on noisy volume data.

  • 48.
    Simonsson, Kjell
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Solid Mechanics.
    Olovsson, Lars
    Nilsson, Larsgunnar
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Solid Mechanics.
    A framework for multiplicative associative isotropic elasto-plasticity, that preserves the structure of the infinitesimal theory2002In: European journal of mechanics. A, Solids, ISSN 0997-7538, Vol. 21, no 2, 191-198 p.Article in journal (Other academic)
    Abstract [en]

    A framework for multiplicative associative isotropic elasto-plasticity that preserves the structure of the infinitesimal theory is presented. Underpinning the work is a kinematical treatment of multiplicative plasticity based on two generic times. To exemplify, the case of one scalar hardening variable is considered in detail. The so obtained relations may be recast in a form identical to relations found in the literature. ⌐ 2002 ╔ditions scientifiques et mΘdicales Elsevier SAS. All rights reserved.

  • 49.
    Adrodegari, Federico
    et al.
    University of Brescia, Italy.
    Saccani, Nicola
    University of Brescia, Italy.
    Kowalkowski, Christian
    Linköping University, Department of Management and Engineering, Industrial Economics. Linköping University, Faculty of Science & Engineering. Hanken School Econ, Finland.
    A framework for PSS business models: formalization and application2016In: PRODUCT-SERVICE SYSTEMS ACROSS LIFE CYCLE, ELSEVIER SCIENCE BV , 2016, Vol. 47, 519-524 p.Conference paper (Refereed)
    Abstract [en]

    In order to successfully move "from products to solutions", companies need to redesign their business model. Nevertheless, service oriented BMs in product-centric firms are under-investigated in the literature: very few works develop a scheme of analysis of such BMs. To provide a first step into closing this gap, we propose a new framework to describe service-oriented BMs, pointing out the main BM components and related PSS characteristics. Thus, the proposed framework aims to help companies to take into account the relevant elements that need to be designed to successfully implement a service-oriented BM and thus guide strategic decisions. (C) 2016 The Authors. Published by Elsevier B.V.

  • 50.
    Noroozi, Sayeh
    Linköping University, Department of Management and Engineering, Production Economics. Linköping University, The Institute of Technology.
    A Framework for Sales and Operations Planning in Process Industries2014Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis studies Sales and Operations Planning (S&OP) in process industries. S&OP is a planning process which has a role of balancing demand and supply at an aggregate level. S&OP has traditionally been considered as a generic process meaning that it is independent from the context of the industry in which it is implemented. Process industries do; however, have specific characteristics which affect their planning and control processes, including S&OP. Therefore, the aim in this thesis is to reconcile these two contradictory stances and furthermore investigate how the specific properties in process industries should be included into an S&OP framework. Such a differentiated framework aims to support process industries to design/implement their S&OP process based on their unique requirements in relation to their markets, products and processes while it also takes into account the specific characteristics regarding the continuous production. Consequently, the process industries would realize the expected benefits from S&OP process to a greater extent.

    The study starts with a literature review on S&OP in process industries in order to build the knowledge foundation for subsequent studies. The results show that the underlying difference between process industries and discrete industries is the object continuity which affects the selection of production processes including resources. Thus, process industries are often hybrids in the sense that their production processes include both continuous production, when the transformed object (material) is continuous, and discrete production when the object (material) turns into discrete products after the discretization point. In other words, process industries deploy both continuous production and discrete production while discrete industries use only discrete production. The specific characteristics of process industries are actually related to the continuous production part and influence the planning processes as well. As the result of this study, the continuous production characteristics that can affect the S&OP process are identified.

    In the continuation of the thesis and in order to provide a typology for planning and control purposes, the object type (continuous and discrete) is combined with two other dimensions i.e. mode type (onetime, intermittent and continuous) and driver type (customer order driven and forecast driven) into a planning and control typology. The mode type addresses the repetitivity of the flow and the driver type takes into account the trigger of the flow. Each dimension has a transition point – i.e. the discretization point for the object type, mode interface point for the mode type and customer order decoupling point for the driver type – and represents a hybrid situation since different production environments are required before and after each transition point. The typology aims to illustrate how each dimension affects the planning and control issues as well as how the dimensions are interrelated and how this combination influence the managerial decisions. The typology integrates the concepts from both process industries and discrete industries and thus, is applicable for both.

    Thereafter the typology is applied to the S&OP process and an integrated framework is suggested based on the three dimensions with specific focus on process industries. In this framework, the effects of hybridities within each dimension and cross-hybridities between the dimensions on the S&OP process are also considered. The importance of hybridities and cross-hybridities lies in the fact that the planning of the hybrid systems is a complex task due to the varying managerial decisions before and after the transition points. Finally, implementation steps for the suggested S&OP framework are outlined for the process industries in order to position themselves in the framework, identify the implementing procedures, and obtain potential benefits based on the differentiated S&OP process.

    List of papers
    1. Sales and operations planning in the process industry: A literature review
    Open this publication in new window or tab >>Sales and operations planning in the process industry: A literature review
    2017 (English)In: International Journal of Production Economics, ISSN 0925-5273, E-ISSN 1873-7579, Vol. 188, 139-155 p.Article in journal (Refereed) Published
    Abstract [en]

    This paper provides a systematic literature review of Sales and Operations Planning (S&OP) in process industries. The aim is to investigate the present state of S&OP in process industries in comparison to discrete manufacturing industries and to identify the desired future state of the S&OP process based on the specific characteristics of process industries. The findings of this paper show that this issue has not received much attention in the academic world. Hence there is a need for conceptual models with focus on process industries’ specific characteristics. Process industries are actually hybrids of continuous production and discrete production (respectively, upstream and downstream of the discretization point) and the specific characteristics of process industries are related to the continuous production part. Thus, in this paper, the characteristics upstream of the discretization point are investigated and the integration of them in the S&OP process of the process industries is stressed.

    Place, publisher, year, edition, pages
    Elsevier, 2017
    Keyword
    Sales and operations planning, Process industry, Discretization point
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-106705 (URN)10.1016/j.ijpe.2017.03.006 (DOI)000401381300013 ()
    Note

    The original title in manuskript fiorm of this article was Sales and operations planning in the process industry.

    Funding agencies: Swedish Foundation for Strategic Research (SSF)

    Available from: 2014-05-19 Created: 2014-05-19 Last updated: 2017-06-13Bibliographically approved
    2. A modularised typology for flow design based on decoupling points - a holistic view on process industries and discrete manufacturing industries
    Open this publication in new window or tab >>A modularised typology for flow design based on decoupling points - a holistic view on process industries and discrete manufacturing industries
    2016 (English)In: Production planning & control (Print), ISSN 0953-7287, E-ISSN 1366-5871, Vol. 27, no 16, 1344-1355 p.Article in journal (Refereed) Published
    Abstract [en]

    Management of production activities covers a wide range of decisions. In this paper, a modularised approach is suggested that, through configuration, generates a case-specific flow design. The approach is based on identification of decision categories that are generic and fundamental in the flow design, covering both discrete manufacturing industries and process industries. Each decision category identifies a unique property of the flow which changes at a particular point: this is termed a decoupling point. A three-dimensional modularised typology is developed by combining three different decision categories. Cases from the steel industry and the tooling industry are used to illustrate how the typology can be applied. The modularised approach provides a typology for the application of both qualitative and quantitative methods for flow management, including planning, control and performance management.

    Place, publisher, year, edition, pages
    TAYLOR & FRANCIS LTD, 2016
    Keyword
    Typology; decoupling point; planning and control; process industry; modularisation
    National Category
    Production Engineering, Human Work Science and Ergonomics
    Identifiers
    urn:nbn:se:liu:diva-132245 (URN)10.1080/09537287.2016.1220649 (DOI)000384468200004 ()
    Note

    Funding Agencies|Swedish Foundation for Strategic Research [PIC-LI]; Process Industrial IT and Automation (PiiA) - VINNOVA; Swedish Energy Agency, Formas; Swedish industry [2014-05110]

    Available from: 2016-10-24 Created: 2016-10-21 Last updated: 2017-04-11
    3. A modularized framework for sales and operations planning with focus on process industries
    Open this publication in new window or tab >>A modularized framework for sales and operations planning with focus on process industries
    2016 (English)In: Production & Manufacturing Research, ISSN 2169-3277, Vol. 4, no 1, 65-89 p.Article in journal (Refereed) Published
    Abstract [en]

    This paper suggests a modularized sales and operations planning (S&OP) framework, consisting of content and process. The framework’s content is based on a typology of decoupling points in which the effect of decoupling points on the decision variables in S&OP is studied. The framework’s process takes a step back and addresses the need for a more elaborate design to precede the operational use of S&OP content for different production contexts. The framework supports both process industries (PIs) and discrete manufacturing industries (DIs), and recognizes their specific requirements and reflects them in their S&OP. The differentiating characteristics of PIs and DIs are emphasized through three different decoupling points, namely: discretization decoupling point, control mode decoupling point, and customer order decoupling point. The suggested framework aims to fill the gap in the literature regarding the lack of aggregate planning processes that match the PIs’ specific requirements by reflecting the differentiating characteristics of PIs in S&OP.

    Place, publisher, year, edition, pages
    Taylor & Francis, 2016
    National Category
    Economics and Business Other Mechanical Engineering Software Engineering
    Identifiers
    urn:nbn:se:liu:diva-133240 (URN)10.1080/21693277.2016.1200502 (DOI)
    Available from: 2016-12-15 Created: 2016-12-15 Last updated: 2017-04-11Bibliographically approved
1234567 1 - 50 of 3862
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