liu.seSearch for publications in DiVA
Change search
Refine search result
1234567 1 - 50 of 1766
CiteExportLink 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
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the 'Create feeds' function.
  • 1.
    Lykke, Nina
    Linköping University, The Tema Institute, The Department of Gender Studies. Linköping University, Faculty of Arts and Sciences.
    20 spørgsmål til kønsforskeren Nina Lykke2014In: Frit flet: fællesbogen / [ed] Naja Marie Aidt, Line Knutzon, Mette Moestrup, Copenhagen: Gyldendal Litteratur, 2014, 1, 194-205 p.Chapter in book (Other (popular science, discussion, etc.))
    Abstract [en]

    Prompted via 20 written questions from the literary authors of the mixed genre text collection, poet, short story writer,  and novelist, Naja Marie Aidt, dramatist Line Knutzon, and poet Mette Moestrup,  Nina Lykke gives a broad account of key ideas and concepts in contemporary feminist thought as a background for the poetic articulation of feminist and anti-racist approaches of the collection.

  • 2.
    Edström, Kristina
    et al.
    School of Education and Communication in Engineering Science, KTH Royal Institute of Technology, Stockholm, Sweden.
    Kolmos, Anette
    Department of Development and Planning, Aalborg University, Aalborg, Denmark.
    Malmi, Lauri
    Department of Computer Science, Aalto University, Helsinki, Finland.
    Bernhard, Jonte
    Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering.
    Andersson, Pernille
    LearningLab DTU, Technical University of Denmark, Kgs. Lyngby, Denmark.
    A bottom-up strategy for establishment of EER in three Nordic countries: The role of networks2016In: European Journal of Engineering Education, ISSN 0304-3797, E-ISSN 1469-5898Article in journal (Refereed)
    Abstract [en]

    This paper investigates the emergence of an engineering education research (EER) community in three Nordic countries: Denmark, Finland and Sweden. First, an overview of the current state of Nordic EER authorship is produced through statistics on international publication. Then, the history of EER and its precursor activities is described in three national narratives. These national storylines are tied together in a description of recent networking activities, aiming to strengthen the EER communities on the Nordic level. Taking these three perspectives together, and drawing on concepts from community of practice theory, network theory and learning network theory, we discuss factors behind the differences in the countries, and draw some conclusions about implications for networking activities in a heterogeneous community. Further, we discuss the role of networks for affording a joint identity.

  • 3.
    Wallsten, Björn
    et al.
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, The Institute of Technology.
    Johansson, Nils
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, The Institute of Technology.
    Krook, Joakim
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, The Institute of Technology.
    A Cable Laid Is a Cable Played: On the Hibernation Logic behind Urban Infrastructure Mines2013In: The Journal of urban technology, ISSN 1063-0732, E-ISSN 1466-1853, Vol. 20, no 3, 85-103 p.Article in journal (Refereed)
    Abstract [en]

    Our societies are reliant on metals to such an extent that the total amounts of some of them in the built environment are comparable in size to the remaining amounts in known mountain ores. Because of concerns about mineral scarcity, the United Nations has assessed alternative sources for metal extraction and targeted urban areas in general and infrastructure systems in particular, since these are large, spatially concentrated and rich in metals. Referring to the possibility of recovering these metal stocks, infrastructure systems constitute what material flow researchers has conceptually termed “urban mines.” While most urban infrastructure is in use, significant amounts of cables and pipes have been disconnected and remain in their subsurface locations; they are “hibernating.” In this article, we analyze the occurrence of such hibernation in the Swedish city of Norrköping's urban infrastructure mine where, we know from a previous study, that every fourth kilo of infrastructure is discarded. Our applied perspective is different from the logic of system expansion as a way to meet increased demand often found in the field of infrastructure studies since we are interested in how systems are disconnected and left behind. This enables us to offer a refined understanding of the concepts of infrastructure “decline” and infrastructure “cold spots.” We argue that to prevent the increase of dormant infrastructures and to engage in the urban mining of already dormant infrastructures, we must develop a sensibility to the materiality of derelict infrastructure components and the underlying causes for why they form different kinds of spatial patterns.

  • 4.
    Hansson, Erik
    Linköping University, Department of Computer and Information Science.
    A Case Study of  Semi-Automatic Parallelization of  Divide and Conquer Algorithms Using Invasive Interactive Parallelization2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Since computers supporting parallel execution have become more and more common the last years, especially on the consumer market,  the need for methods and tools for parallelizing existing sequential programs has highly increased. Today there exist different methods of achieving this, in a more or less user friendly way. We have looked at one method, Invasive Interactive Parallelization (IIP), on a special problem area, divide and conquer algorithms, and performed a case study. This case study shows that by using IIP, sequential programs can be parallelized both for shared and distributed memory machines. We have focused on parallelizing Quick Sort for OpenMP and MPI environment using a tool, Reuseware, which is based on the concepts of Invasive Software Composition.

  • 5.
    Eriksson, Elisabeth
    et al.
    Linköping University, Faculty of Educational Sciences. Linköping University, Department of Behavioural Sciences and Learning, Education, Teaching and Learning.
    Björklund, Lisa
    Stockholm University, Sweden.
    Thornberg, Robert
    Linköping University, Department of Behavioural Sciences and Learning, Education, Teaching and Learning. Linköping University, Faculty of Educational Sciences.
    A categorization of teacher feedback in the classroom: A field study on feedback based on routine classroom assessment in primary school2017In: Research Papers in Education, ISSN 0267-1522, E-ISSN 1470-1146, Vol. 32, no 3, 316-332 p.Article in journal (Refereed)
    Abstract [en]

    The aim of the present study was to examine and categorise teachers’ strategies for feedback in day-to-day communication in primary school. The different feedback categories constructed and grounded in data are applicable to feedback on learning and knowledge as well as on behavioural skills. Qualitative classroom observations were conducted in four primary school classrooms, including a total of four teachers and 75 students. A constructivist grounded theory approach was used throughout the analytical process. The analysis of the field data generated five main categories of feedback focuses: expecting, emotionally responding, normalising, steering, and deliberating. The categories are all broad, yet with sub-categories specific and nuanced, presenting concepts by which we can verbalize and communicate teachers’ feedback strategies.  The categories place teachers’ feedback actions in a landscape, not on a linear axis. The complexity of feedback, as it is shown in the present study challenges a dichotomisation of feedback and captures more of a complexity of classroom assessment.

  • 6.
    Thornberg, Robert
    Linköping University, Department of Behavioural Sciences and Learning, Teaching and Learning in School, Teacher Education and other Educational Settings. Linköping University, Faculty of Educational Sciences.
    A classmate in distress: schoolchildren as bystanders and their reasons for how they act2007In: Social Psychology of Education, ISSN 1381-2890, E-ISSN 1573-1928, ISSN 1573-1928 (Online), Vol. 10, no 1, 5-28 p.Article in journal (Refereed)
    Abstract [en]

    Research has shown that bystanders more often fail to or are slower to help a victim in emergency when there are other bystanders than when there are not. The study presented in this paper is a qualitative case study with a focus on students’ own reasons why they do not help a classmate in emergency when there are other children witnessing the emergency situation in the real-life classroom case studied. Grounded theory methods were used to analyse the data. The individual conversations with the students indicated a variety of definitions of the specific distress situation when they recalled and talked about the classroom incident. During the process of the analysis seven concepts of definitions associated with passive or non-intervention bystander behaviour were constructed and grounded in the empirical material: trivialisation, dissociation, embarrassment association, busy working priority, compliance with a competitive norm, audience modelling, and responsibility transfer. Relations between these concepts of definitions were also analysed. However, this study is a first step and a first report from an ongoing study about school children as helper and bystander.

  • 7.
    Islam, Md. Zahidul
    Linköping University, Department of Computer and Information Science, Software and Systems. Linköping University, The Institute of Technology.
    A Cloud Based Platform for Big Data Science2014Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
    Abstract [en]

    With the advent of cloud computing, resizable scalable infrastructures for data processing is now available to everyone. Software platforms and frameworks that support data intensive distributed applications such as Amazon Web Services and Apache Hadoop enable users to the necessary tools and infrastructure to work with thousands of scalable computers and process terabytes of data. However writing scalable applications that are run on top of these distributed frameworks is still a demanding and challenging task. The thesis aimed to advance the core scientific and technological means of managing, analyzing, visualizing, and extracting useful information from large data sets, collectively known as “big data”. The term “big-data” in this thesis refers to large, diverse, complex, longitudinal and/or distributed data sets generated from instruments, sensors, internet transactions, email, social networks, twitter streams, and/or all digital sources available today and in the future. We introduced architectures and concepts for implementing a cloud-based infrastructure for analyzing large volume of semi-structured and unstructured data. We built and evaluated an application prototype for collecting, organizing, processing, visualizing and analyzing data from the retail industry gathered from indoor navigation systems and social networks (Twitter, Facebook etc). Our finding was that developing large scale data analysis platform is often quite complex when there is an expectation that the processed data will grow continuously in future. The architecture varies depend on requirements. If we want to make a data warehouse and analyze the data afterwards (batch processing) the best choices will be Hadoop clusters and Pig or Hive. This architecture has been proven in Facebook and Yahoo for years. On the other hand, if the application involves real-time data analytics then the recommendation will be Hadoop clusters with Storm which has been successfully used in Twitter. After evaluating the developed prototype we introduced a new architecture which will be able to handle large scale batch and real-time data. We also proposed an upgrade of the existing prototype to handle real-time indoor navigation data.

  • 8.
    Hedblom, Maria
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    A Cognition-Based Definition of Creativity and A Proposition for Approaching Creativity Artificially2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Can a computer truly be creative? This is the philosophical question that defines this thesis. It is suggested that the only way for this question to be answered in the affirmative, is to thoroughly investigate the cognitive nature of creativity.

    First the thesis proposes a definition of creativity based on cognitive research, human intuition and artificial creativity debates. This definition accounts for not only that thecreative product has to be both novel and useful, but that the creative agent has to exceed a certain level of cognitive maturity (in thesis referred to as - intelligence) and be aware of the creative process and context. The framework for the creative process isfounded on the psychologically supported notion of a circle of divergent and convergent thinking, and a cognitive machinery of conceptual blending.

    It is in the framework of the creative process that the criterion for the creative productis generated. In the circle of divergent and convergent thinking and through conceptual blending, novel ideas are first generated, then evaluated. For this to be possible thecreative agent has to exceed a certain level of cognitive abilities, and in order to properly evaluate the product, it also needs to have awareness of the process and context to beable to evaluate the product.

    A second part of the thesis looks at problems with AI and what that means for the approaches to artificial creativity. By using the reasoning behind the definition, the possibility to create truly creative computers are proposed and discussed. In the line of the definition a conceptual suggested approach is presented, that if satisfied it is the author’s suggestion that the artificial system should be deemed "creative".

    The artificial agent has far to go before it is equal in cognitive maturity to human intellect, and the capacity for awareness of the process and context is debatable. Genetic algorithms, randomness and perception is presented as possibilities for artificial agents to create novelty, and a multi layered processing system build on learning through perception, and evaluation build on key concepts from context and statistics of previous knowledge, is introduced as possible means of creating artificial creativity.

  • 9.
    Granlund, Gösta
    Linköping University, The Institute of Technology. Linköping University, Department of Electrical Engineering, Computer Vision.
    A Cognitive Vision Architecture Integrating Neural Networks with Symbolic Processing2006In: Künstliche Intelligenz, ISSN 0933-1875, no 2, 18-24 p.Article in journal (Other academic)
    Abstract [en]

    A fundamental property of cognitive vision systems is that they shall be extendable, which requires that they can both acquire and store information autonomously. The paper discusses organization of systems to allow this, and proposes an architecture for cognitive vision systems. The architecture consists of two parts. The first part, step by step learns a mapping from percepts directly onto actions or states. In the learning phase, action precedes perception, as action space is much less complex. This requires a semantic information representation, allowing computation and storage with respect to similarity. The second part uses invariant or symbolic representations, which are derived mainly from system and action states. Through active exploration, a system builds up concept spaces or models. This allows the system to subsequently acquire information using passive observation or language. The structure has been used to learn object properties, and constitutes the basic concepts for a European project COSPAL, within the IST programme.

  • 10.
    Emanuelsson, Pär
    et al.
    Ericsson AB, Linköping, Sweden.
    Nilsson, Ulf
    Linköping University, Department of Computer and Information Science, TCSLAB - Theoretical Computer Science Laboratory. Linköping University, The Institute of Technology.
    A Comparative Study of Industrial Static Analysis Tools (extended version)2008Report (Other academic)
    Abstract [en]

    Almost all software contains defects. Some defects are found easily while others are never found, typically because they emerge seldom or not at all. Some defects that emerge relatively often even go unnoticed simply because they are not perceived as errors or are not suffciently severe. Software defects may give rise to several types of errors, ranging from logical/functional ones (the program sometimes computes incorrect values) to runtime errors (the program typically crashes), or resource leaks (performance of the program degrades possibly until the program freezes or crashes). Programs may also contain subtle security vulnerabilities that can be exploited by malicious attackers to gain control over computers.    Fixing defects that suddenly emerge can be extremely costly in particular if found at the end of the development cycle, or worse: after deployment. Many simple defects in modern programming languages can be found by modern compilers, e.g. in statically typed languages. But the predominating method for finding defects is testing. Testing has the potential of finding most types of defects, however, testing is costly and no amount of testing will find all defects. Testing is also problematic because it can be applied only to executable code, i.e. rather late in the development process. Alternatives to testing, such as data°ow analysis and formal verification, have been known since the 1970s but have not gained widespread acceptance outside academia|that is, until recently; lately several commercial tools for detecting runtime error conditions at compile time have emerged. The tools build on static analysis and can be used to find runtime errors as well as resource leaks and even some security vulnerabilities statically, i.e. without executing the code. This paper is a survey and comparison of three market leading static analysis tools: PolySpace Verifier, Coverity Prevent and Klocwork K7. The list is by no means exhaustive, and the list of competitors is steadily increasing, but the three tools represent state-of-the-art in the field at the moment.

    The main objective of this study is (1) to identify significant static analysis functionality provided by the tools, but not addressed in a normal compiler, and (2) to survey the underlying supporting technology. The goal is not to provide a ranking of the tools; nor is it to provide a comprehensive survey of all functionality provided by the tools. Providing such a ranking is problematic for at least two reasons: Static analysis is generally only part of the functionality provided by the tool; for instance, Klocwork K7 supports both refactoring and software metrics which are not supported by the two other tools. Even if restricting attention only to static analysis functionality the tools provide largely non-overlapping functionality. Secondly, even when the tools seemingly provide the same functionality (e.g. detection of dereferencing of null pointers) their solutions are often not comparable; each tool typically finds defects which are not found by any of the other tools.

    Studying the internals of commercial and proprietary tools is not without problems|in particular, it is impossible to get full information about technical solutions. However, some technical information is publicly available in manuals and white papers; some of the tools also originate from academic tools which have been extensively described in research journals and conference proceedings. While technical solutions may have changed since then, we believe that such information is still largely valid. We have also consulted representatives from all three providers with the purpose to validate our descriptions of the tools. Still it must be pointed out that the descriptions of suggested technical solutions is subject to a certain amount of guessing in some respects.

    The rest of the report is organized as follows: In Section 2 we define what we mean by the term static analysis and survey some elementary concepts and preconditions; in particular, the trade off between precision and analysis time. Section 3 contains a description of basic principles of static analysis. In Sections 4{6 we survey the static analysis functionality provided by PolySpace Verifier/Desktop, Coverity Prevent and Klocwork K7 focusing in particular on the support for the C and C++ programming languages. Section 7 addresses the complementary issue of programming guidelines such as those of The Motor Software Reliability Association (MISRA). Section 8 contains a qualitative comparison of the three tools summing up their relative merits and shortcomings. The section also surveys several industrial evaluations of the tools over time at Ericsson, in particular involving the products from Coverity and Klocwork. Section 9 contains conclusions.

  • 11.
    Jonasson, Lise-Lotte
    Linköping University, Department of Medical and Health Sciences, Nursing Science. Linköping University, Faculty of Health Sciences.
    A comprehensive picture of ethical values in caring encounters, based on experiences of those involved: Analysis of concepts developed from empirical studies2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Older people should have a life with a sense of value and should feel confident. These ethical values, which are expressed in normative ethics, are expected to prevail in empirical ethics. Central components of nursing are the ethical issues of autonomy, beneficence, non-maleficence and the principles of justice. The general aim of this thesis is to identify and describe the ethical values that are apparent in the caring encounter and their influence on the people involved. This is done from the perspective of the older person in study (I), next of kin in study (II) and nurses in study (III). In study (IV) the aim was to synthesize the concepts from empirical studies (I- III) and analyze, compare and interrelate them with normative ethics. Studies (I, III) were empirical observational studies including follow-up interviews. Twenty-two older people participated voluntarily in study (I), and in study (III) 20 nurses participated voluntarily. In study (II) fourteen next of kin were interviewed. In studies (I- III) constant comparative analysis, the core foundation of grounded theory, was used. Five concepts were used in the analysis in study (IV); three from the grounded theory studies (I- III) and two from the theoretical framework on normative ethics i.e. the ICN code and SFS law. Five categories; being addressed, receiving respect, desiring to participate, increasing self-determination and gaining self-confidence formed the basis for the core category ‚Approaching‛ in study (I). ‘Approaching’ indicates the ethical values that guide nurses in their caring encounters with older people. These ethical values are noted by the older people and are greatly appreciated by them, and also lead to improved quality of care. Four categories were identified in study (II): Receiving, showing respect, facilitating participation and showing professionalism. These categories formed the basis of the core category ‚Being amenable‛, a concept identified in the next of kin’s description of the ethical values that they and the older patients perceive in the caring encounter. In study (III), three categories were identified: showing consideration, connecting, and caring for. These categories formed the basis of the core category ‚Corroborating‛. Corroborating deals with support and interaction. Empirical ethics and normative ethics are intertwined, according to the findings of this study (IV). Normative ethics influence the nurse’s practical performance and could have a greater influence in supporting nurses as professionals. Criteria of good ethical care according to this thesis are: showing respect, invitation to participation, allowing self-determination, and providing safe and secure care. These criteria are elements of the concept of being professional. Professionalism of nurses is shown by: the approach nurses adapt to the performance of their duties, and their competence and knowledge, but also how they apply laws and professional codes

    List of papers
    1. The importance of ‘approaching’ older people: a grounded theory
    Open this publication in new window or tab >>The importance of ‘approaching’ older people: a grounded theory
    2012 (English)In: International Journal of Older People Nursing, ISSN 1748-3735, Vol. 7, no 1, 29-36 p.Article in journal (Refereed) Published
    Abstract [en]

    Aims and objectives. The aim of this study was to identify and describe the ethical values in caring encounters as experienced by older patients in their daily interaction with nurses in wards for older people.

    Background. Ethical values and morals are important aspects that influence the quality of care.

    Methods. Empirical observational study including follow-up interviews. Twenty-two older patients participated voluntarily in this study. Constant comparative analysis, the core foundation of grounded theory was used.

    Results. Five categories: being addressed, receiving respect, desiring to participate, increasing self-determination and gaining self-confidence formed the bases for the core category.

    Approaching. Approaching concerns how people become closer to each other in a physical space. It also includes how people become closer to each other in a dialogue, involving verbal or bodily communication.

    Conclusions and relevance to clinical practice. Approaching indicates the ethical values that guide nurses in their caring encounters with older patients. These values are noted by the patient and have an individual value as well as leading to improved quality of their care. The older patient will be confident and satisfied with the caring encounter if the desired components in the nurse's approaching are exhibited.

    Place, publisher, year, edition, pages
    Wiley, 2012
    Keyword
    Ethics, nursing care, older people, qualitative methods
    National Category
    Medical and Health Sciences
    Identifiers
    urn:nbn:se:liu:diva-67874 (URN)10.1111/j.1748-3743.2010.00248.x (DOI)
    Available from: 2011-05-02 Created: 2011-05-02 Last updated: 2013-09-12Bibliographically approved
    2. Ethical values in caring encounters on a geriatric ward from the next of kin´s perspective: An interview study
    Open this publication in new window or tab >>Ethical values in caring encounters on a geriatric ward from the next of kin´s perspective: An interview study
    2010 (English)In: International Journal of Nursing Practice, ISSN 1322-7114, E-ISSN 1440-172X, Vol. 16, no 1, 20-26 p.Article in journal (Refereed) Published
    Abstract [en]

    The aim of this study was to identify and describe the governing ethical values that next of kin experience in interaction with nurses who care for elderly patients at a geriatric clinic. Interviews with fourteen next of kin were conducted and data were analysed by Constant comparative analysis. Four categories were identified: Receiving, showing respect, facilitating participation and showing professionalism. These categories formed the basis of the core category: “Being amenable”, a concept identified in the next of kin’s description of the ethical values that they and the elderly patients perceive in the caring encounter. Being amenable means that the nurses are guided by ethical values; taking into account the elderly patient and the next of kin. Nurses’ focusing on elderly patients’ well-being as a final criterion affects the next of kin and their experience of this fundamental condition for high quality care seems to be fulfilled.

    Place, publisher, year, edition, pages
    Wiley, 2010
    Keyword
    Ethical values, geriatric wards, grounded theory, nursing ethics, next of kin
    National Category
    Medical and Health Sciences
    Identifiers
    urn:nbn:se:liu:diva-51737 (URN)10.1111/j.1440-172X.2009.01805.x (DOI)000274177000004 ()
    Note

    On the day of the defence day the status of this article was: Manuscript. This is the author’s version of the following article: Lise-Lotte Jonasson, Per-Erik Liss, Björn Westerlind and Carina Berterö, Ethical values in caring encounters on a geriatric ward from the next of kin´s perspective: An interview study, 2010, International Journal of Nursing Practice, (16), 1, 20-26. which has been published in final form at: http://dx.doi.org/10.1111/j.1440-172X.2009.01805.x Copyright: Blackwell Publishing Ltd http://eu.wiley.com/WileyCDA/Brand/id-35.html

    Available from: 2009-11-16 Created: 2009-11-16 Last updated: 2014-01-16Bibliographically approved
    3. Corroborating indicates nurses’ ethical values in a geriatric ward
    Open this publication in new window or tab >>Corroborating indicates nurses’ ethical values in a geriatric ward
    (English)Manuscript (preprint) (Other academic)
    Abstract [en]

    Aim. The aim of the study was to identify nurses’ ethical values, which become apparent through their behavior in the interactions with older patients in caring encounters at a geriatric clinic.

    Background. Descriptions of ethics in caring practice are a problem since they are vague compared with the four principles of autonomy, beneficence, non-maleficence, and justice.

    Methods. A Grounded Theory methodology was used. In total, 65 observations and follow-up interviews with 20 nurses were conducted, and data were analysed by constant comparative analysis.

    Findings. Three categories were identified: showing consideration, connecting, and caring for. These categories formed the basis of the core category: ―Corroborating‖. In corroborating the focus is on the person in need of integrity and self-determination, that is, the autonomy principle. A similar concept was earlier described in regard to confirming. Corroborating deals more with support and interaction. It is not enough to be kind and show consideration, i.e. to benefit someone; nurses must also connect and care for the older person, i.e. demonstrate nonmaleficence, in order to corroborate that person.

    Conclusion. The findings of this study can improve the ethics of nursing care. There is a need for research on development of a high standard of nursing care to corroborate the older patients in order to maintain their autonomy, beneficence and non-maleficence. The principal of justice was not specifically identified as a visible nursing action. However, all older patients received treatment, care and reception in an equivalent manner.

    Keyword
    Ethical values, geriatric wards, grounded theory, nursing ethics, nurses’ behaviour, nursing
    National Category
    Medical and Health Sciences
    Identifiers
    urn:nbn:se:liu:diva-67875 (URN)
    Available from: 2011-05-02 Created: 2011-05-02 Last updated: 2013-09-12Bibliographically approved
    4. Empirical and normative ethics: a synthesis relating to the care of older patients
    Open this publication in new window or tab >>Empirical and normative ethics: a synthesis relating to the care of older patients
    2011 (English)In: Nursing Ethics, ISSN 0969-7330, E-ISSN 1477-0989, Vol. 18, no 6, 814-824 p.Article in journal (Refereed) Published
    Abstract [en]

    The aim of this study was to synthesize the concepts from empirical studies and analyze, compare and interrelate them with normative ethics. International Council of nurses (ICN) and the Health and Medical Service Act are normative ethics. Five concepts were used in the analysis; three from the grounded theory studies and two from the theoretical framework on normative ethics. A simultaneous concept analysis resulted in five outcomes; interconnectedness, interdependence, corroboratedness, completeness and good care are all related to the empirical perspective of the nurse’s interaction with the older patient, and the normative perspective, i.e. that found in ICN code and SFS law. Empirical ethics and normative ethics are intertwined according to the findings of this study. Normative ethics are supporting documents for nurses as professionals and by extension also beneficial for older patients.

    Place, publisher, year, edition, pages
    Sage Publications, 2011
    Keyword
    Empirical ethics, Normative ethics, ICN code, Health and Medical Service Act, Beneficence, Nurse
    National Category
    Medical and Health Sciences Nursing
    Identifiers
    urn:nbn:se:liu:diva-67876 (URN)10.1177/0969733011405875 (DOI)000297476000007 ()
    Available from: 2011-05-02 Created: 2011-05-02 Last updated: 2013-09-12Bibliographically approved
  • 12.
    Wilhelms, Sören
    Linköping University, Department of Mechanical Engineering, Machine Design. Linköping University, The Institute of Technology.
    A conceptual design support system using principle solution elements2003In: 14th International Conference on Engineering Design: Research for Practice - Innovative Products, Processes and Organisations / [ed] Folkeson, A; Gralén, K; Norell, M; Sellgren, U, Glasgow: The Design Society , 2003, 295-296 p.Conference paper (Refereed)
    Abstract [en]

    The parametric modelling paradigm has become important in shape design and simulation. A prerequisite for product development with an integrated digital model is the availability of parametric models even for early design stages. This paper presents a parametric information model for conceptual design, consisting of requirements, hierarchical functions, function structure, principle solution elements and concepts, and a computer tool prototype based on the model.

  • 13.
    Olsson, Maria
    et al.
    Linköping University, Department of Management and Engineering, Machine Design.
    Larsson, Lina
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    A Conceptual Female Hygiene Product: Developed from Needs and Prerequisites in an Agricultural East African Context2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Menstruation is a large problem for females in development countries today. Studies have shown that around 40 percent of menstruating girls have been absent from school due to their menstruation. One of the challenges that need to be solved is the absence of female hygiene products amongst women, especially in low income and developing countries due to the cost of commercial products. In countries where the national economy is unstable or poorly comes a problem with importing products, it would be better if they could produce their own products so that the national economy is supported. Small factories and production sites that produce female hygiene products have started to form in some areas. This shows that it is possible to produce in the context where the product is going to be sold. One of the advantages of this system is from the environmental perspective, many of the local production sites use environmentally friendly materials and some products are up to 95 percent bio-degradable. The purpose of this thesis is to develop a concept for a sustainable female hygiene product that women in developing countries can afford to buy, this so that social effects can be enabled due to the security that a functioning protection can bring. To be able to do so a field study in Uganda has been conducted. During the study users and local producers were interviewed to find out what demands and prerequisites there are to create a female hygiene product that can be produced and used locally. The field study gave a deeper understanding and knowledge about both the subject as whole and the technical aspects to take into consideration when developing a female hygiene product. The study confirmed that female hygiene products, or rather the lack of them, are a big problem that needs to be solved quickly. It also revealed that the possibilities for producing in the context existed but was not developed enough. Through an analysis of the empirical findings as well as theories about, for example, material and production, six concepts were developed. The concepts and already existing products were evaluated and correlated to requirements collected in the field study. One concept was chosen for further development from this evaluation. This concept consists of a disposable napkin that is fastened by putting it in holders sewn in the panty. The panty can be bought as a product with existing holders or the holders can be sewn into the users own panties. The final concept has taken both technical aspects and social effects into account. Lists of requirements on material for the concept as well as the production of it are also included in the work. A prototype of the concept has been sewn and tested. The final concept in this work is not a finished product and needs further developing before being released as a product. More work need to be done on specifying the production and specific materials to implement the concept. For further developing, it is also important to have in mind in what context the product would be used due to the different possibilities and demands that the setting gives.

  • 14.
    Broberg, C.
    et al.
    Inst. of Occup. Therapy/Physiother., Sahlgrenska Acad. at Goteborg Univ., P.O. Box 455, SE 405 30 Göteborg, Sweden.
    Aars, M.
    School of Physiotherapy, Faculty of Health Sciences, Tromsø University College, Tromsø, Norway.
    Beckmann, Kristina
    Linköping University, Faculty of Health Sciences. Linköping University, Department of Medicine and Health Sciences, Physiotherapy.
    Emaus, N.
    School of Physiotherapy, Faculty of Health Sciences, Tromsø University College, Tromsø, Norway.
    Lehto, P.
    Degree Programme in Physiotherapy, Pirkanmaa Polytechnic, Tampere, Finland.
    Lahteenmaki, M.-L.
    Lähteenmäki, M.-L..
    Licentiate, A.
    Degree Programme in Physiotherapy, Pirkanmaa Polytechnic, Tampere, Finland.
    Thys, W.
    Department of Physiotherapy, Arteveldehogeschool, Gent, Belgium.
    Vandenberghe, R.
    Department of Physiotherapy, Arteveldehogeschool, Gent, Belgium.
    A conceptual framework for curriculum design in physiotherapy education - An international perspective2003In: Advances in Physiotherapy, ISSN 1403-8196, Vol. 5, no 4, 161-168 p.Article in journal (Refereed)
    Abstract [en]

    Globalization is having a significant impact on healthcare and physiotherapy education, among other sectors, can benefit from this trend. The main aim of this work was to develop and describe a conceptual framework for physiotherapy curriculum design and, in doing so, to stimulate international debate on physiotherapy education. The framework was developed through an international collaboration and was tried out in the participating schools in order to refine it further. The current framework consists of three elements to be taken into account in physiotherapy curriculum design: (1) The content aspect or the knowledge base of physiotherapy, (2) the learning aspect or the student's learning process, and (3) the socio-cultural context aspect, which concerns the way in which physiotherapy is experienced and practised. The content aspect includes a description of core concepts of physiotherapy: body, movement and interaction, and acknowledges that physiotherapy should be science-based. The learning aspect and the socio-cultural context aspect form separate parts of the framework. Nonetheless, all aspects are intertwined and reflect theory-practice integration. This framework is offered for critical reflection and as the basis for a debate on the development and evaluation of physiotherapy programmes. Further work is needed in testing the relevance of this framework for curriculum design in different countries and setting.

  • 15.
    Bohlin, Gustav
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Härting, Jennifer
    IPN- Leibniz-Institut für die Pädagogik der Naturwissenschaften und Mathematik.
    Harms, Ute
    IPN- Leibniz-Institut für die Pädagogik der Naturwissenschaften und Mathematik.
    Tibell, Lena A. E.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    A Criteria Catalogue Covering Multiple Evolutionary Aspects Including Threshold Concepts for Assessment of Animations Explaining Evolution2015Conference paper (Refereed)
  • 16.
    Öberg, Per
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, The Institute of Technology.
    A DAE Formulation for Multi-Zone Thermodynamic Models and its Application to CVCP Engines2009Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In the automotive area there are ever increasing demands from legislators and customers on low emissions and good fuel economy. In the process of developing and investigating new technologies, that can meet these demands, modeling and simulation have become important as standard engineering tools. To improve the modeling process new concepts and tools are also being developed.

    A formulation of a differential algebraic equation (DAE) that can be used for simulation of multi-zone in-cylinder models is extended and analyzed. Special emphasis is placed on the separation between thermodynamic state equations and the thermodynamic properties. This enables implementations with easy reuse of model components and analysis of simulation results in a structured manner which gives the possibility to use the formulation in a large number of applications. The introduction and depletion of zones are handled and it is shown that the DAE formulation has a unique solution as long as the gas model fulfills a number of basic criteria. Further, an example setup is used to validate that energy, mass, and volume are preserved when using the formulation in computer simulations. In other words, the numerical solution obeys the thermodynamic state equation and the first law of thermodynamics, and the results are consistent and converge as tolerances are tightened. As example applications, the DAE formulation is used to simulate spark ignited SI and Diesel engines as well as simple control volumes and 1-dimensional pipes. It is thus shown that the DAE formulation is able to adapt to the different requirements of the SI and Diesel engine models.

    An interesting application is the SI engine with continuously variable cam phasing (CVCP), which is a technology that reduces the fuel consumption. It influences the amount of air and residual gases in the engine in a non trivial manner and this SI application is used to evaluate three control oriented models for cylinder air charge and residual mass fraction for a CVCP-engine both for static and transient conditions. The models are: a simple generalized flow restriction model created with physical insight and two variants of a model that is based on an energy balance at intake valve closing (IVC). The two latter models require measurement of cylinder pressure and one also requires an air mass flow measurement. Using the SI model as reference it is shown that transients in cam positions have a large impact on air charge and residual mass fraction, and the ability of the models to capture these effects is evaluated. The main advantages of the generalized flow restriction model are that it is simple and does not require measurement of the cylinder pressure but it is also the model with the largest errors for static operating points and highest sensitivity in transients. The two models that use an energy balance at IVC both handle the transient cycles well. They are, however, sensitive to the temperature at IVC. For static cycles it is therefore advantageous to use the model with air mass flow measurement since it is less sensitive to input data. During transients however, if the external measurement is delayed, it is better to use the model that does not require the air mass flow.

    The conclusion is that the DAE formulation is a flexible, robust, tool, and that it is well suited for multi-zone in-cylinder models as well as models for manifolds and pipes outside the cylinder.

    List of papers
    1. Control Oriented Modeling of the Gas Exchange Process in Variable Cam Timing Engines
    Open this publication in new window or tab >>Control Oriented Modeling of the Gas Exchange Process in Variable Cam Timing Engines
    2006 (English)In: SAE Technical Paper 2006-01-0660, SAE , 2006Conference paper, Published paper (Refereed)
    Abstract [en]

    Variable cam timing engines pose new questions for engine control system designers. The cam timing directly influences cylinder air charge and residual mass fraction. Three models that predict residual mass fraction are investigated for a turbocharged dual independent Variable Cam Timing (VCT) engine. The three models (Fox et. al. 1993, Ponti et. al. 2002, and Mladek et. al. 2000) that all have real time capabilities are evaluated and validated against data from a crank angle based reference model. None of these models have previously been validated to cover this engine type. It is shown that all three models can be extended to dual independent VCT engines and that they also give a good description of the residual gas fraction. However, it is shown that the two most advanced models, based on a thermodynamic energy balance, are very sensitive to the model inputs and proper care must therefore be taken when these models are used

    Place, publisher, year, edition, pages
    SAE, 2006
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-18306 (URN)
    Available from: 2009-05-18 Created: 2009-05-18 Last updated: 2009-10-14Bibliographically approved
    2. Control Oriented Gas Exchange Models for CVCP Engines and their Transient Sensitivity
    Open this publication in new window or tab >>Control Oriented Gas Exchange Models for CVCP Engines and their Transient Sensitivity
    2007 (English)In: Oil & gas science and technology, ISSN 1294-4475, Vol. 62, no 4, 573-584 p.Article in journal (Refereed) Published
    Abstract [en]

    The paper analyzes a set of control oriented models for the gas exchange phase in engines with continuously variable cam phasing (CVCP). These models describe the mass flow of fresh gases and the residual gases caught in the cylinder during the gas exchange phase. Simulations with CVCP transients are also performed to analyze the models performance during transients.

    Place, publisher, year, edition, pages
    IFP, 2007
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-18307 (URN)10.2516/ogst:2007041 (DOI)
    Available from: 2009-05-18 Created: 2009-05-18 Last updated: 2009-05-18Bibliographically approved
  • 17.
    Cronemyr, P.
    et al.
    ALSTOM Power, SE-612 82 Finspong, Sweden.
    Ohrwall, Ronnback A.
    Eppinger, S.D.
    Sloan School of Management, Massachusetts Inst. of Technology, Cambridge, MA 02139, United States.
    A decision support tool for predicting the impact of development process improvements2001In: Journal of engineering design (Print), ISSN 0954-4828, Vol. 12, no 3, 177-199 p.Article in journal (Refereed)
    Abstract [en]

    This paper presents a method for simulating the impact of improvements to the engineering design process. The method can be used by managers and teams to prioritize the most valuable process improvements among several suggested ones, before they actually take place. The method is based on the design structure matrix (DSM) developed by Steward (1981), and an extension of DSM called the work transformation model developed by Smith and Eppinger (1997). We introduce two new concepts, total process time and simulated to-be/as-is ratio. Two applications are presented. The first, a gas turbine blade development process, illustrates the estimated gain of a process improvement, and evaluates the actual implementation. The second application, a buyer-supplier product development project, shows how the method could be used as a decision support tool in an inter-organizational context. Input to the process simulation comes from process descriptions and estimates of anticipated effects of process change at the activity level. Output shows the effect of such a change on a total process level.

  • 18.
    Bylund, N.
    et al.
    Volvo Car Corporation, Göteborg, Sweden.
    Fredricson, Harald
    Volvo Car Corporation, Göteborg, Sweden.
    Thompson, G.
    UMIST, Manchester, England.
    A design process for complex mechanical structures using property based models, with application to car bodies2002In: Proceedings of the 7th International Design Conference: DESIGN 2002 / [ed] D. Marjanovic, 2002, 611-620 p.Conference paper (Refereed)
    Abstract [en]

    The design of complex mechanical structures is multi-objective and includes the treatements of a wide range of requirements such as quantitative, qualitative, subjective and objective. An example of this type of structure is a car body, where design has a long tradition from wich valuable experience can be drawn however fixation to old practises has to be avoided. The design process described in the paper aims to reduce lead time while not excluding innovative solutions. By representing all concepts on a common base as a property based model and use optimisation, an objective analysis can be done early thereby only viable concepts will emerge to further selection. The data gained at early phases is used as input to detail design reducing iterations.

  • 19.
    Gremyr, Ida
    et al.
    Chalmers University of Technology, Göteborg, Sweden).
    Elg, Mattias
    Linköping University, Department of Management and Engineering, Quality Technology and Management. Linköping University, The Institute of Technology. Linköping University, HELIX Vinn Excellence Centre.
    A developmental view on implementation of quality management concepts2014In: International Journal of Quality and Service Sciences, ISSN 1756-669X, E-ISSN 1756-6703, Vol. 6, no 2/3, 143-154 p.Article in journal (Refereed)
    Abstract [en]

    Purpose – The purpose of this paper is to examine the value of a developmental learning view on implementation of quality management (QM) concepts. QM concepts are common in various organizations; some implement them smoothly, others struggle and sometimes even abandon the initiatives. What is then a successful implementation – is it the use a specific QM method as a standard problem solving approach, or is it that learning has occurred during implementation?

    Design/methodology/approach – The paper is based on an illustrative case study carried out at a hospital in western Sweden. The data have been collected through about 130 hours of participation in project work by the first author and through seven face-to-face interviews of about one hour each.

    Findings – It is shown that a Design for Six Sigma pilot project with a narrow view on implementation could be regarded as a failure, but it gave rise to much learning and new improved ways of working. Hence, it is argued that a developmental view on implementation can support learning by an emergent and experimental approach to implementation processes.

    Originality/value – Much research has been done on how to increase the success rate of implementations of QM initiatives, e.g. procedures to follow to reach an outcome where the new way of working is standard procedure. Less research has problematized the implementation process, questioning what a successful outcome of an implementation is.

  • 20.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Discussion of Model Accuracy in System Identification1992In: International journal of adaptive control and signal processing (Print), ISSN 0890-6327, E-ISSN 1099-1115, Vol. 6, no 3, 161-171 p.Article in journal (Refereed)
    Abstract [en]

    Model quality and model accuracy are of prime interest in system identification. In this contribution we will review and discuss these concepts. In particular we will split model errors into contributions from a ‘random error’ and a ‘bias error’ and describe and discuss how to assess these two concepts.

  • 21.
    Ljung, Lennart
    Linköping University, Department of Electrical Engineering, Automatic Control. Linköping University, The Institute of Technology.
    A Discussion of Model Accuracy in System Identification1991Report (Other academic)
    Abstract [en]

    Model quality and model accuracy are of prime interest in system identification. In this contribution we will review and discuss these concepts. In particular we will split model errors into contributions from a ‘random error’ and a ‘bias error’ and describe and discuss how to assess these two concepts.

  • 22.
    Asghar, Malik Summair
    Linköping University, Department of Electrical Engineering. Linköping University, The Institute of Technology.
    A “Divide-by-Odd Number” Injection-Locked Frequency Divider.2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The use of resonant CMOS frequency dividers with direct injection in frequencysynthesizers has increased in recent years due to their lower power consumptioncompared to conventional digital prescalers. The theoretical and experimentalaspects of these dividers have received great attention. This masters thesis workis a continuation of earlier work, based on the fundamentals of Injection-LockedFrequency Dividers (ILFD’s). The LC CMOS ILFD with direct injection is wellknownfor its divide-by-2 capability. However, it does not divide well by oddnumbers. The goal of this master thesis work is to modify the LC CMOS ILFDwith direct injection so that it can divide equally well by odd and even integers.In this master thesis report, an introduction to the basic concepts behindInjection-Locked frequency dividers is first presented. Some of the previous workand the background of a reference LC CMOS ILFD design are studied. The author,studied the reference design, and the experimental setup used for characterizingit’s locking behavior. The algorithm used to characterize the locking behavior ofthis ILFD are explored to reproduce the results for divide-by-even numbers for theexisting ILFD topology. Using a Spice model these results are also reproduced insimulations.Over the years, numerous ILFD circuit topologies have been proposed, most ofwhich have been optimized for division by even numbers, especially divide-by-2.It has been more difficult to realize division by odd numbers, such as divide-by-3.This master thesis work develops a simple modification to an LC CMOS injectionlocked frequency divider (ILFD) with direct injection, which gives it a wide lockingrange both in the “divide-by-odd number” mode and in the conventional “divideby-even number” regime, thereby opening up applications which require frequencydivision by an odd number. The work presents the circuit architecture, SPICEsimulations and experimental validation.

  • 23.
    Eriksson, Lars
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    A European Perspective on Collaborative Research in Modeling and Control of Turbocharged Engines2014In: Journal of the Society of Instrument and Control Engineers, ISSN 0453-4662, Vol. 53, no 8, 716-724 p.Article in journal (Refereed)
    Abstract [en]

    Modeling and simulation plays an important role in the design of the control systems for advanced power­trains. One clear trend is that turbocharged engines are becoming more common and are also being equipped with more than one boosting device. To systematicaUy handle these advanced turbocharging concepts we need to build more knowledge and this knowledge is encap­sulated in models. Recent results for modeling and control of compres­sors in advanced engines are provided.   In particular the experimental results from a large measurement cam-paign with engine and gas stand hardware an;\ sum­marized as rules of thumb extrapolating manufacturer compressor data. Thereafter, system properties öf V­engines with pa.rallel turbocharging is investigated and used to illustrate applications of the newly developed modeling knowledge. It is used to niodel, simulate and analyzc a compressor instability phenomenon that gives rise to an oscillation. A detection scheme and a con­troller is also developed and it is shown to quell the oscillation. Finally the benefits of academic and industrial collab­oration, that play an important role in the authors lab as well as in many European institutes, are commented upon. A concluding remark is that thc works that are summarized would not have been possible without the cooperation between academy and industry.

  • 24.
    Rantanen, V.-V.
    et al.
    Department of Mathematics, University of Turku, FIN-20014, Turku, Finland, Department of Biochemistry and Pharmacy, Åbo Akademi University, Tykistökatu 6 BioCity 3A, FIN-20521, Turku, Finland.
    Denessiouk, K.A.
    Department of Biochemistry and Pharmacy, Åbo Akademi University, Tykistökatu 6 BioCity 3A, FIN-20521, Turku, Finland.
    Gyllenberg, M.
    Department of Mathematics, University of Turku, FIN-20014, Turku, Finland.
    Koski, Timo
    Linköping University, The Institute of Technology. Linköping University, Department of Mathematics, Mathematical Statistics .
    Johnson, M.S.
    Department of Biochemistry and Pharmacy, Åbo Akademi University, Tykistökatu 6 BioCity 3A, FIN-20521, Turku, Finland.
    A fragment library based on Gaussian mixtures predicting favorable molecular interactions2001In: Journal of Molecular Biology, ISSN 0022-2836, Vol. 313, no 1, 197-214 p.Article in journal (Refereed)
    Abstract [en]

    Here, a protein atom-ligand fragment interaction library is described. The library is based on experimentally solved structures of protein-ligand and protein-protein complexes deposited in the Protein Data Bank (PDB) and it is able to characterize binding sites given a ligand structure suitable for a protein. A set of 30 ligand fragment types were defined to include three or more atoms in order to unambiguously define a frame of reference for interactions of ligand atoms with their receptor proteins. Interactions between ligand fragments and 24 classes of protein target atoms plus a water oxygen atom were collected and segregated according to type. The spatial distributions of individual fragment - target atom pairs were visually inspected in order to obtain rough-grained constraints on the interaction volumes. Data fulfilling these constraints were given as input to an iterative expectation-maximization algorithm that produces as output maximum likelihood estimates of the parameters of the finite Gaussian mixture models. Concepts of statistical pattern recognition and the resulting mixture model densities are used (i) to predict the detailed interactions between Chlorella virus DNA ligase and the adenine ring of its ligand and (ii) to evaluate the "error" in prediction for both the training and validation sets of protein-ligand interaction found in the PDB. These analyses demonstrate that this approach can successfully narrow down the possibilities for both the interacting protein atom type and its location relative to a ligand fragment. © 2001 Academic Press.

  • 25.
    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.

  • 26.
    Dunin-Keplicz, Barbara
    et al.
    Warsaw University.
    Anh Nguyen, Linh
    Warsaw University.
    Szalas, Andrzej
    Linköping University, Department of Computer and Information Science, KPLAB - Knowledge Processing Lab. Linköping University, The Institute of Technology.
    A Framework for Graded Beliefs, Goals and Intentions2010In: Fundamenta Informaticae, ISSN 0169-2968, Vol. 100, no 1-4, 53-76 p.Article in journal (Refereed)
    Abstract [en]

    In natural language we often use graded concepts, reflecting different intensity degrees of certain features. Whenever such concepts appear in a given real-life context, they need to be appropriately expressed in its models. In this paper, we provide a framework which allows for extending the BGI model of agency by grading beliefs, goals and intentions. We concentrate on TEAMLOG [6, 7, 8, 9, 12] and provide a complexity-optimal decision method for its graded version TEAMLOG(K) by translating it into CPDLreg (propositional dynamic logic with converse and "inclusion axioms" characterized by regular languages). We also develop a tableau calculus which leads to the first EXPTIME (optimal) tableau decision procedure for CPDLreg. As CPDLreg is suitable for expressing complex properties of graded operators, the procedure can also be used as a decision tool for other multiagent formalisms.

  • 27.
    Persson, Johan
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Feng, Xiaolong
    ABB Corporate Research Västerås, Sweden.
    Wappling, Daniel
    ABB Corporate Research Västerås, Sweden.
    Ölvander, Johan
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    A Framework for Multidisciplinary Optimization ofa Balancing Mechanism for an Industrial Robot2015In: Journal of Robotics, ISSN 1687-9600, E-ISSN 1687-9619, 1-8 p., 389769Article in journal (Other academic)
    Abstract [en]

    The paper presents a framework that can be used to design and optimize a balancing mechanism for an industrial robot. The framework has the capability to optimize three different concepts - a mechanical, a pneumatic and a hydro-pneumatic. Several disciplines are included in the framework, such as dynamic and static analyses of the robot performance. Optimization is performed for each concept and the obtained optimal designs are all better then the reference design. This means that the framework can be used both as a tool to optimize the balancing mechanism and also to support concept selection.

  • 28.
    Padgham, Lin
    et al.
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Lambrix, Patrick
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering.
    A Framework for Part-of Hierarchies in Terminological Logics1994In: Principles of Knowledge Representation and Reasoning - Proceedings of the Fourth International Conference - KR 94, Morgan Kaufmann Publishers, 1994, 485-496 p.Conference paper (Refereed)
    Abstract [en]

    There is a growing recognition that part-whole hierarchies are a very general form of representation, widely used by humans in commonsense reasoning. This paper develops a terminological logic, and related inference mechanisms for representing and reasoning about composite concepts and individuals. A basic terminological logic language is extended with constructs for describing composite concepts in terms of their parts and the relationships between them. A part-of hierarchy is defined, based on the relationship of compositional inclusion. This part-of hierarchy is analogous to, but different from, the “is-a” hierarchy. Compositional inferencing is defined as a process which infers the existence of a whole, based on the existence of the required parts, where the parts are in the necessary relationship to each other. Three stable states are defined with respect to compositional inferencing - compositional extensions, credulous compositional extensions and skeptical compositional conclusions. This framework significantly enhances and is complementary to, knowledge representation and reasoning based on is-a hierarchies.

  • 29.
    Vitoria, Aida
    Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
    A framework for reasoning with rough sets2005Licentiate thesis, monograph (Other academic)
    Abstract [en]

    Rough sets framework has two appealing aspects. First, it is a mathematical approach to deal with vague concepts. Second, rough set techniques can be used in data analysis to find patterns hidden in the data. The number of applications of rough sets to practical problems in different fields demonstrates the increasing interest in this framework and its applicability.

    Most of the current rough sets techniques and software systems based on them only consider rough sets defined explicitly by concrete examples given in tabular form. The previous research mostly disregards the following two problems. The first problem is related with how to define rough sets in terms of other rough sets. The second problem is related with how to incorporate domain or expert knowledge.

    This thesis proposes a language that caters for implicit definitions of rough sets obtained by combining different regions of other rough sets. In this way, concept approximations can be derived by taking into account domain knowledge. A declarative semantics for the language is also discussed. It is then shown that programs in the proposed language can be compiled to extended logic programs under the paraconsistent stable model semantics. The equivalence between the declarative semantics of the language and the declarative semantics of the compiled programs is proved. This transformation provides the computational basis for implementing our ideas. A query language for retrieving information about the concepts represented through the defined rough sets is also defined. Several motivating applications are described. Finally, an extension of the proposed language with numerical measures is discussed. This extension is motivated by the fact that numerical measures are an important aspect in data mining applications.

  • 30.
    Vitoria, Aida
    Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
    A framework for reasoning with rough sets2005In: Transactions on Rough Sets IV / [ed] James F. Peters and Andrzej Skowron, Springer Berlin/Heidelberg, 2005, Vol. 3700, 178-276 p.Chapter in book (Refereed)
    Abstract [en]

    Rough sets framework has two appealing aspects. First, it is a mathematical approach to deal with vague concepts. Second, rough set techniques can be used in data analysis to find patterns hidden in the data. The number of applications of rough sets to practical problems in different fields demonstrates the increasing interest in this framework and its applicability. This thesis(1) proposes a language that caters for implicit definitions of rough sets obtained by combining different regions of other rough sets. In this way, concept approximations can be derived by taking into account domain knowledge. A declarative semantics for the language is also discussed. It is then shown that programs in the proposed language can be compiled to extended logic programs under the paraconsistent stable model semantics. The equivalence between the declarative semantics of the language and the declarative semantics of the compiled programs is proved. This transformation provides the computational basis for implementing our ideas. A query language for retrieving information about the concepts represented through the defined rough sets is also discussed. Several motivating applications are described. Finally, an extension of the proposed language with numerical measures is presented. This extension is motivated by the fact that numerical measures are an important aspect in data mining applications.

  • 31.
    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
  • 32.
    Dornhege, C.
    et al.
    University of Freiburg.
    Kleiner, Alexander
    Linköping University, Department of Computer and Information Science, Artificial Intelligence and Intergrated Computer systems. Linköping University, The Institute of Technology.
    A Frontier-Void-Based Approach for Autonomous Exploration in 3D2013In: Advanced Robotics, ISSN 0169-1864, E-ISSN 1568-5535, Vol. 27, no 6, 459-468 p.Article in journal (Refereed)
    Abstract [en]

    We consider the problem of an autonomous robot searching for objects in unknown 3d space. Similar to the well known frontier-based exploration in 2d, the problem is to determine a minimal sequence of sensor viewpoints until the entire search space has been explored. We introduce a novel approach that combines the two concepts of voids, which are unexplored volumes in 3d, and frontiers, which are regions on the boundary between voids and explored space. Our approach has been evaluated on a mobile platform equipped with a manipulator searching for victims in a simulated USAR setup. First results indicate the real-world capability and search efficiency of the proposed method.

  • 33.
    Fogelberg Eriksson, Anna
    Linköping University, Department of Behavioural Sciences and Learning, Learning in Working Life and Educational Settings. Linköping University, Faculty of Arts and Sciences.
    A gender perspective and learning evaluation2009In: Learning Through Ongoing Evaluation / [ed] Svensson, Lennart; Brulin, Göran; Jansson, Sven & Sjöberg, Karin, Lund: Studentlitteratur , 2009, 1, 203-215 p.Chapter in book (Other academic)
    Abstract [sv]

    This book presents a relatively new perspective of learning evaluation in interactive forms. The question is how long-term effects can be achieved, i.e. a sustainable development with the aid of projects. This is an important question, particularly in the context of EU Structural Funds. In the book learning evaluation concepts are grounded in theory. The majority of chapters also include practical examples of learning evaluation and discuss these in some depth. Important aspects of the evaluation process include the researcher?s or evaluator?s constructive dialogue with the participants, the importance of critical examination, and that approaches shift between proximity and distance. Common knowledge formation is important in a learning evaluation and analysis seminars are presented as a way of achieving this. The book?s target groups include university students in the fields of sociology, education, business economics and management and human resources management. The book could also be used in university courses and in-service training for managers, developers, consultants, project managers

  • 34.
    Pandikow, Asmus
    Linköping University, Department of Computer and Information Science, RTSLAB - Real-Time Systems Laboratory. Linköping University, The Institute of Technology.
    A Generic Principle for Enabling Interoperability of Structured and Object-Oriented Analysis and Design Tools2003Doctoral thesis, monograph (Other academic)
    Abstract [en]

    In the 1980s, the evolution of engineering methods and techniques yielded the object-oriented approaches. Specifically, object orientation was established in software engineering, gradually relieving structured approaches. In other domains, e.g. systems engineering, object orientation is not well established. As a result, different domains employ different methods and techniques. This makes it difficult to exchange information between the domains, e.g. passing systems engineering information for further refinement to software engineering. This thesis presents a generic principle for bridging the gap between structured and object-oriented specification techniques. The principle enables interoperability of structured and object-oriented analysis and design tools through mutual information exchanges. Therefore, the concepts and elements of representative structured and object-oriented specification techniques are identified and analyzed. Then, a metamodel for each specification technique is created. From the meta-models, a common metamodel is synthesized. Finally, mappings between the meta-models and the common meta-model are created. Used in conjunction, the meta-models, the common meta-model and the mappings enable tool interoperability through transforming specification information under one meta-model via the common meta-model into a representation under another metamodel. Example transformations that illustrate the proposed principle using fragments of an aircraft’s landing gear specification are provided. The work presented in this thesis is based on the achievements of the SEDRES (ESPRIT 20496), SEDEX (NUTEK IPII-98-6292) and SEDRES-2 (IST 11953) projects. The projects strove for integrating different systems engineering tools in the forthcoming ISO-10303-233 (AP-233) standard for systems engineering design data. This thesis is an extension to the SEDRES / SEDEX and AP-233 achievements. It specifically focuses on integrating structured and modern UML based object-oriented specification techniques which was only performed schematically in the SEDRES / SEDEX and AP-233 work.

  • 35.
    Johansson, Gustaf
    Linköping University, Department of Biomedical Engineering, Medical Informatics. Linköping University, The Institute of Technology.
    A Global Linear Optimization Framework for Adaptive Filtering and Image Registration2015Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Digital medical atlases can contain anatomical information which is valuable for medical doctors in diagnosing and treating illnesses. The increased availability of such atlases has created an interest for computer algorithms which are capable of integrating such atlas information into patient specific dataprocessing. The field of medical image registration aim at calculating how to match one medical image to another. Here the atlas information could give important hints of which kinds of motion are plausible in different locations of the anatomy. Being able to incorporate such atlas specific information could potentially improve the matching of images and plausibility of image registration - ultimately providing a more correct information on which to base health care diagnosis and treatment decisions.

    In this licentiate thesis a generic signal processing framework is derived : Global Linear Optimization (GLO). The power of the GLO framework is first demonstrated quantitatively in a very high performing image denoiser. Important proofs of concepts are then made deriving and implementing three important capabilities regarding adaptive filtering of vector fields in medica limage registration:

    1. Global regularization with local anisotropic certainty metric.
    2. Allowing sliding motion along organ and tissue boundaries.
    3. Enforcing an incompressible motion in specific areas or volumes.

    In the three publications included in this thesis, the GLO framework is shown to be able to incorporate one each of these capabilities. In the third and final paper a demonstration is made how to integrate more and more of the capabilities above into the same GLO to perform adaptive processing on relevant clinical data. It is shown how each added capability improves the result of the image registration. In the end of the thesis there is a discussion which highlights the advantage of the contributions made as compared to previous methods in the scientific literature.

    List of papers
    1. Globally Optimal Displacement Fields Using Local Tensor Metric
    Open this publication in new window or tab >>Globally Optimal Displacement Fields Using Local Tensor Metric
    2012 (English)In: Image Processing (ICIP), 2012 19th IEEE International Conference on, 2012, 2957-2960 p.Conference paper, Poster (with or without abstract) (Other academic)
    Abstract [en]

    In this paper, we propose a novel algorithm for regularizing displacement fields in image registration. The method uses the local structure tensor and gradients of the displacement field to impose a local metric, which is then used optimizing a global cost function. The method allows for linear operators, such as tensors and differential operators modeling the underlying physical anatomy of the human body in medical images. The algorithm is tested using output from the Morphon image registration algorithm on MRI data as well as synthetic test data and the result is compared to the initial displacement field. The results clearly demonstrate the power of the method and the unique features brought forth through the global optimization approach.

    Keyword
    Image Processing, Image Registration, Regularization, Optimization, Tensor
    National Category
    Medical Image Processing Signal Processing
    Identifiers
    urn:nbn:se:liu:diva-81947 (URN)10.1109/ICIP.2012.6467520 (DOI)978-1-4673-2534-9 (ISBN)
    Conference
    2012 IEEE International Conference on Image Processing, September 30 - October 3, 2012, Orlando, Florida, USA
    Projects
    Dynamic Context Atlases for Image Denoising and Patient Safety
    Funder
    Swedish Research Council, 2011-5176Swedish Research Council, 2007-4786
    Available from: 2012-09-26 Created: 2012-09-26 Last updated: 2015-04-17Bibliographically approved
    2. Motion Field Regularization for Sliding Objects using Global Linear Optimization
    Open this publication in new window or tab >>Motion Field Regularization for Sliding Objects using Global Linear Optimization
    2015 (English)Conference paper, Oral presentation only (Refereed)
    Abstract [en]

    In image registration it is often necessary to employ  regularization in one form or another to be able to find a plausible  displacement field. In medical applications, it is useful to define  different constraints for different areas of the data. For instance  to measure if organs have moved as expected after a finished  treatment. One common problem is how to find plausible motion  vectors far away from known motion. This paper introduces a new  method to build and solve a Global Linear Optimizations (GLO)  problem with a novel set of terms which enable specification of  border areas to allow a sliding motion. The GLO approach is  important especially because it allows simultaneous incorporation of  several different constraints using information from medical atlases  such as localization and properties of organs. The power and  validity of the method is demonstrated using two simple, but  relevant 2D test images. Conceptual comparisons with previous  methods are also made to highlight the contributions made in this  paper. The discussion explains important future work and experiments  as well as exciting future improvements to the GLO framework.

    Keyword
    Image Registration, Missing Data, Medical Image Processing, Global Linear Optimization
    National Category
    Radiology, Nuclear Medicine and Medical Imaging
    Identifiers
    urn:nbn:se:liu:diva-112210 (URN)
    Conference
    The 4th International Conference on Pattern Recognition Applications and Methods, Januari 10-12, Lisbon, Portugal
    Projects
    Dynamic Context Atlases for Image Denoising and Patient SafetyGlobal Linear Optimization
    Funder
    Swedish Research Council, 2011-5176Linnaeus research environment CADICS
    Available from: 2014-11-18 Created: 2014-11-18 Last updated: 2015-04-17Bibliographically approved
    3. Regularization in Medical Image Registration using Global Linear Optimization
    Open this publication in new window or tab >>Regularization in Medical Image Registration using Global Linear Optimization
    (English)Manuscript (preprint) (Other academic)
    Abstract [en]

    Common problems in image registration include having large parts of the images contain noisy, uncertain, missing or impossible motion. Regularization is the field that aims to overcome these problems. In this article, we propose a novel framework : Global Linear Optimization (GLO) which we demonstrate has the capabilities to simultaneously and globally regularize with respect to : (1) anisotropic certainty of prior motion field, (2) sliding of organ boundaries and (3) incompressibility of organ interiors. The power of the presented framework consists of being able to spatially adapt which subsets of the data each constraint should affect and then solve a large sparse linear equations system which automatically propagates a solution over the data set through an overlapping localized metric. We demonstrate the validity of the methods and the power of the GLO framework on relevant test cases and on medical data from the DIR-lab.

    Keyword
    Keywords—Image Registration, Medical Image Analysis, Regularization, Adaptive Filtering, Medical Atlases, Global Methods, Optimization, Global Linear Optimization, Structure Tensor, Anisotropic Filtering, Partial Differential Equations
    National Category
    Medical Image Processing Other Computer and Information Science
    Identifiers
    urn:nbn:se:liu:diva-117140 (URN)
    Available from: 2015-04-17 Created: 2015-04-17 Last updated: 2015-04-17Bibliographically approved
  • 36.
    Nilsson, Susanna
    et al.
    Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory. Linköping University, The Institute of Technology.
    Johansson, Björn
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, The Institute of Technology.
    Jönsson, Arne
    Linköping University, Department of Computer and Information Science, Human-Centered systems. Linköping University, Faculty of Arts and Sciences.
    A Holistic Approach to Design and Evaluation of Mixed Reality Systems2010In: The Engineering of Mixed Reality Systems / [ed] Emmanuel Dubois, Philip Gray, Laurence Nigay, London: Springer London, 2010, 1, 33-55 p.Chapter in book (Other academic)
    Abstract [en]

    This chapter addresses issues related to usability and user experience of mixed reality (MR) systems based on a naturalistic iterative design approach to the development of MR applications. Design and evaluation of MR applications are still mostly based on methods used for development of more traditional desktop graphical user interfaces. MR systems are in many aspects very different from desktop computer applications, so these traditional methods are not sufficient for MR applications. There is a need for new approaches to user-centred design and development of MR systems. One such approach is based on the concepts of cognitive systems engineering (CSE). In this chapter we show how this approach can be applied to the development of MR systems. Two case studies are described, where a holistic CSE approach to design, implementation and evaluation has been used. The results show that allowing real end users (field/domain experts) to interact in a close to naturalistic setting provides insights on how to design MR applications that are difficult to attain otherwise. We also show the importance of iterative design, again involving real end users.

  • 37.
    Hallgren, Mattias
    et al.
    Linköping University, Department of Management and Engineering, Production Economics. Linköping University, The Institute of Technology.
    Olhager, Jan
    Linköping University, Department of Management and Engineering, Production Economics. Linköping University, The Institute of Technology.
    Schroeder, Roger G.
    University of Minnesota, USA .
    A hybrid model of competitive capabilities2011In: International Journal of Operations & Production Management, ISSN 0144-3577, Vol. 31, no 5, 511-526 p.Article in journal (Refereed)
    Abstract [en]

    Purpose – The purpose of this paper is to present and test a new model for competitive capabilities.Traditionally, a cumulative model has been viewed as having one sequence of building competitivecapabilities in a firm in support of market needs, including quality, delivery, cost efficiency andflexibility. Although appealing as a conceptual model, empirical testing has not been able to fullysupport the cumulative model. This paper acknowledges the need for a hybrid approach to managingcapability progression. It brings together the literature on trade-offs, cumulative capabilities, andorder winners and qualifiers.Design/methodology/approach – A new hybrid approach for modelling competitive capabilities istested empirically using data from the high performance manufacturing (HPM) study, round 3,including three industries and seven countries – a total of 211 plants.Findings – The hybrid model shows significantly better fit with the data from the sample than thecumulative models suggested by previous literature. Empirical support is found for the traditionalperception that a high level of quality is a prerequisite for a high level of delivery performance.However, cost efficiency and flexibility do not exhibit a cumulative pattern. Instead, the results showthat they are developed in parallel. The findings suggest that a balance between cost efficiency andflexibility is built upon high levels of quality and delivery performance.Research limitations/implications – Since we limit the empirical investigation to three industriesand seven countries, it would be interesting to extend the testing of this model to more industries andcountries. This research shows that combining perspectives and insights from different researchstreams – in this case, trade-off theory and the concepts of cumulative capabilities, and order winnersand qualifiers – can be fruitful.Practical implications – The results of this paper provides managers with guidelines concerningthe configuration of competitive capabilities. First, a qualifying level of quality needs to be attained,followed by a qualifying level of delivery. Then, a balance between potential order winners, i.e. costefficiency and flexibility, needs to be attained.Originality/value – This paper presents a new approach to modelling competitive capabilities thatsynthesises previous research streams and perspectives from cumulative capabilities, contestingcapabilities (trade-offs), and order winners and qualifiers.

  • 38.
    Dunin-Keplicz, Barbara
    et al.
    University of Warsaw.
    Nguyen, Linh Anh
    University of Warsaw.
    Szalas, Andrzej
    Linköping University, Department of Computer and Information Science, KPLAB - Knowledge Processing Lab. Linköping University, The Institute of Technology.
    A Layered Rule-Based Architecture for Approximate Knowledge Fusion2010In: COMPUTER SCIENCE AND INFORMATION SYSTEMS, ISSN 1820-0214, Vol. 7, no 3, 617-642 p.Article in journal (Refereed)
    Abstract [en]

    In this paper we present a framework for fusing approximate knowledge obtained from various distributed, heterogenous knowledge sources. This issue is substantial in modeling multi-agent systems, where a group of loosely coupled heterogeneous agents cooperate in achieving a common goal. In paper [5] we have focused on defining general mechanism for knowledge fusion. Next, the techniques ensuring tractability of fusing knowledge expressed as a Horn subset of propositional dynamic logic were developed in [13,16]. Propositional logics may seem too weak to be useful in real-world applications. On the other hand, propositional languages may be viewed as sublanguages of first-order logics which serve as a natural tool to define concepts in the spirit of description logics [2]. These notions may be further used to define various ontologies, like e. g. those applicable in the Semantic Web. Taking this step, we propose a framework, in which our Horn subset of dynamic logic is combined with deductive database technology. This synthesis is formally implemented in the framework of HSPDL architecture. The resulting knowledge fusion rules are naturally applicable to real-world data.

  • 39.
    Ganghoffer, J.F.
    et al.
    ICSI, 15, Rue Jean Starcky, BP 2478, 68057 Mulhouse Cedex, France.
    Simonsson, Kjell
    Linköping University, Department of Management and Engineering, Solid Mechanics. Linköping University, Faculty of Science & Engineering.
    A micromechanical model of the martensitic transformation1998In: Mechanics of Materials, ISSN 0167-6636, Vol. 27, no 3, 125-144 p.Article in journal (Refereed)
    Abstract [en]

    A micromechanical model of the martensitic transformation at the grain scale has been established, considering the more specific case of ferrous alloys. The transformation proceeds through the formation of successive variants of the product phase within a unit cell representative of a grain; interactions between neighbouring grains are simulated by the choice of periodic boundary conditions. From a thermodynamical analysis, a selection rule for the order and orientation of the forming martensitic variants has been established, based on internal stresses anisotropy. These concepts have been implemented into a two-dimensional finite element simulation of the transformation, considering an elastoplastic behaviour of both parent and product phases. Morphological and crystallographical features of the transformation are considered: one variant consists of a thin layer of elements within the mesh that can form with four possible discrete orientations. Simulation results show the development of the plate pattern as a combination of the influence of both external load and internal stresses built during the progress of the transformation. These are related to global evolutions of transformation plasticity vs. transformation progress. Comparison with experiments show a similar form of the evolutions of the total strain; however, the model overestimates the strain levels. The possible reasons for this discrepancy are discussed.

  • 40.
    Riegel, Barbara
    et al.
    Linköping University, Department of Medical and Health Sciences, Nursing Science. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Center, Department of Cardiology in Linköping. University of Pennsylvania School of Nursing, Philadelphia, USA.
    Jaarsma, Tiny
    Linköping University, Department of Social and Welfare Studies, Division of Health, Activity and Care. Linköping University, Faculty of Health Sciences.
    Strömberg, Anna
    Linköping University, Department of Medical and Health Sciences, Nursing Science. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Center, Department of Cardiology in Linköping.
    A Middle-Range Theory of Self-Care of Chronic Illness2012In: Advances in Nursing Science, ISSN 0161-9268, E-ISSN 1550-5014, Vol. 35, no 3, 194-204 p.Article in journal (Refereed)
    Abstract [en]

    Nearly 50% of adults have one or more chronic illnesses. Self-care is considered essential in the management of chronic illness, but the elements of self-care in this context have not been specified in a middle-range theory. This article describes a middle-range theory of self-care that addresses the process of maintaining health with health promoting practices within the context of the management required of a chronic illness. The key concepts include self-care maintenance, self-care monitoring, and self-care management. Assumptions and propositions of the theory are specified. Factors influencing self-care including experience, skill, motivation, culture, confidence, habits, function, cognition, support from others, and access to care are described.

  • 41.
    Hultén, Magnus
    et al.
    Linköping University, Department of Social and Welfare Studies, Learning, Aesthetics, Natural science. Linköping University, Faculty of Educational Sciences.
    Artman, Henrik
    Royal Institute of Technology, Sweden.
    House, David
    Royal Institute of Technology, Sweden.
    A model to analyse students’ cooperative idea generation in conceptual design2016In: International journal of technology and design education, ISSN 0957-7572, E-ISSN 1573-1804Article in journal (Refereed)
    Abstract [en]

    In this article we focus on the co-creation of ideas. Through the use of concepts from collaborative learning and communication theory we suggest a model that will enable the cooperative nature of creative design tasks to emerge. Four objectives of the model are stated and elaborated on in the paper: that the model should be anchored in previous research; that it should allow for collaborative aspects of creative design to be accounted for; that it should address the mechanisms by which new ideas are generated, embraced and cultivated during actual design; and that it should have a firm theoretical grounding. The model is also exemplified by two test sessions where two student pairs perform a time-constrained design task. We hope that the model can play a role both as an educational tool to be used by students and a teacher in design education, but primarily as a model to analyse students’ cooperative idea generation in conceptual design.

  • 42.
    Bodirsky, Manuel
    et al.
    Technical University of Dresden, Germany.
    Jonsson, Peter
    Linköping University, Department of Computer and Information Science, Software and Systems. Linköping University, Faculty of Science & Engineering.
    A Model-Theoretic View on Qualitative Constraint Reasoning2017In: The journal of artificial intelligence research, ISSN 1076-9757, E-ISSN 1943-5037, Vol. 58, 339-385 p.Article in journal (Refereed)
    Abstract [en]

    Qualitative reasoning formalisms are an active research topic in artificial intelligence. In this survey we present a model-theoretic perspective on qualitative constraint reasoning and explain some of the basic concepts and results in an accessible way. In particular, we discuss the significance of omega-categoricity for qualitative reasoning, of primitive positive interpretations for complexity analysis, and of Datalog as a unifying language for describing local consistency algorithms.

  • 43.
    Rocha, Andre
    et al.
    Universidade Nova de Lisboa, Caparica, Portugal .
    Ribeiro, Luis
    Universidade Nova de Lisboa, Caparica, Portugal .
    Barata, Jose
    Universidade Nova de Lisboa, Caparica, Portugal .
    A Multi Agent Architecture to Support Self-organizing Material Handling2014In: Technological Innovation for Collective Awareness Systems: 5th IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS 2014, Costa de Caparica, Portugal, April 7-9, 2014. Proceedings / [ed] Luis M. Camarinha-Matos, Nuno S. Barrento, Ricardo Mendonça, Springer Berlin/Heidelberg, 2014, Vol. 423, 93-100 p.Chapter in book (Other academic)
    Abstract [en]

    Emerging market conditions press current shop floors hard. Mass customization implies that manufacturing system have to be extremely dynamic when handling variety and batch size. Hence, the ability to quickly reconfigure the system is paramount. This involves both the stations that carry out the production processes and the transport system. Traditionally system reconfiguration issues have been approached from a optimization point of view. This means allocating a certain batch of work to specific machines/stations in an optimal schedule. Although in a an abstract way these solutions are elegant and sound sometimes the number and nature of their base assumptions are unrealistic. Approaching the problem from a self-organizing perspective offers the advantage of attaining a fair solution in a concrete environment and as a reaction of the current operational conditions. Even if optimality cannot be ensured the solutions attained and the online re-adjustments render the system generally robust. This works extends the IDEAS Agent Development Environment (IADE) developed in the FP7 Instantly Deployable Evolvable Assembly Systems (IDEAS) project which has demonstrated the basic concepts of the proposed approach. The main architectural changes are presented and justified and the prospects for the analysis and self-organizing control are presented.

  • 44.
    Hearn, Jeff
    Linköping University, The Tema Institute, The Department of Gender Studies. Linköping University, Faculty of Arts and Sciences.
    A multi-faceted power analysis of mens violence to known women: from hegemonic masculinity to the hegemony of men2012In: Sociological Review, ISSN 0038-0261, E-ISSN 1467-954X, Vol. 60, no 4, 589-610 p.Article in journal (Refereed)
    Abstract [en]

    This article presents a multi-faceted power analysis of mens violence to known women, by way of assessing two main perspectives on research in men and masculinities: first, that founded on hegemonic masculinity, and, second, that based on the hegemony of men. Each perspective is interrogated in terms of understandings of mens violence to known women. These approaches are articulated in relation to empirical research, and conceptual and theoretical analysis. Thus this article addresses to what extent hegemonic masculinity and the hegemony of men, respectively, are useful concepts for explaining and engaging with mens violence to known women? The article concludes with discussion of more general implications of this analysis.

  • 45.
    Öberg, Per
    et al.
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, The Institute of Technology.
    Nyberg, Peter
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, The Institute of Technology.
    Nielsen, Lars
    Linköping University, The Institute of Technology.
    A New Chassis Dynamometer Laboratory for Vehicle Research2013In: SAE International Journal of Passenger Cars - Electronic and Electrical Systems, ISSN 1946-4614, E-ISSN 1946-4622, Vol. 6, no 1, 152-161 p.Article in journal (Refereed)
    Abstract [en]

    In recent years the need for testing, calibration and certification of automotive components and powertrains have increased, partly due to the development of new hybrid concepts. At the same time, the development within electrical drives enables more versatile chassis dynamometer setups with better accuracy at a reduced cost. We are developing a new chassis dynamometer laboratory for vehicle research, aiming at extending a recently commercially available dynamometer, building a new laboratory around it, and applying the resulting facility to some new challenging vehicle research problems. The projects are enabled on one hand by collaboration with the dynamometer manufacturer, and on the other hand on collaboration with automotive industry allowing access to relevant internal information and equipment. The test modes of the chassis dynamometer are under development in a joint collaboration with the manufacturer. The laboratory has been operational since September 2011 and has already been used for NVH-analysis for a tire pressure indication application, chassis dynamometer road force co-simulation with a moving base simulator, co-surge modeling and control for a 6-cylinder bi-turbo engine, and traditional engine mapping. We are also looking at projects with focus on look-ahead control, as well as clutch and transmission modeling and control, and driving cycle related research.

  • 46.
    Nilsson, Ylva
    et al.
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    Eriksson, Lars
    Linköping University, Department of Electrical Engineering, Vehicular Systems. Linköping University, Faculty of Science & Engineering.
    A New Formulation of Multi-Zone Combustion Engine Models2001In: Advances in Automotive Control 2001, Pergamon Press, 2001, 629-634 p.Conference paper (Refereed)
    Abstract [en]

    Cylinder pressure simulation has grown to become an important tool when developing and evaluating new engine concepts and control strategies. A new formulation of zero-dimensional multi-zone models is developed and described. A general model structure is formulated that rely on a set of differential algebraic equations that are easy to solve. The selected formulation also results in models that are easy to scale, i.e. add new zones, and to increase complexity, which is a result of the selected structure. A number of important issues that can cause problems when simulating the model are treated. It is shown: a) How a new zone is initialized. b) How variables of varying magnitude can be scaled to avoid numerical difficulties. c) How numerical errors accumulated during the simulation can be reduced by using a set of consistency equations.

  • 47.
    Jalili, Armin
    et al.
    Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran.
    Sayedi, S. M.
    Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran.
    Wikner, Jacob
    Linköping University, Department of Electrical Engineering, Electronics System. Linköping University, The Institute of Technology.
    Zeidaabadi Nezhad, Abolghasem
    Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran.
    A nonlinearity error calibration technique for pipelined ADCs2011In: Integration, ISSN 0167-9260, Vol. 44, no 3, 229-241 p.Article in journal (Refereed)
    Abstract [en]

    This paper presents a digital background calibration technique that measures and cancels offset, linear and nonlinear errors in each stage of a pipelined analog to digital converter (ADC) using a single algorithm. A simple two-step subranging ADC architecture is used as an extra ADC in order to extract the data points of the stage-under-calibration and perform correction process without imposing any changes on the main ADC architecture which is the main trend of the current work. Contrary to the conventional calibration methods that use high resolution reference ADCs, averaging and chopping concepts are used in this work to allow the resolution of the extra ADC to be lower than that of the main ADC.

  • 48.
    Dahlberg, Joen
    et al.
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering. The Swedish National Road and Transport Research Institute, Linköping, Sweden.
    Göthe-Lundgren, Maud
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    Engevall, Stefan
    Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering.
    A note on the nonuniqueness of the Equal Profit Method2017In: Applied Mathematics and Computation, ISSN 0096-3003, E-ISSN 1873-5649, Vol. 308, 84-89 p.Article in journal (Refereed)
    Abstract [en]

    When a set of players cooperate, they need to decide how the collective cost should be allocated amongst them. Cooperative game theory provides several methods or solution concepts, that can be used as a tool for cost allocation. In this note, we consider a specific solution concept called the Equal Profit Method (EPM). In some cases, a solution to the EPM is any one of infinitely many solutions. That is, it is not always unique. This leads to a lack of clarity in the characterization of the solutions obtained by the EPM. We present a modified version of the EPM, which unlike its precursor ensures a unique solution. In order to illustrate the differences, we present some numerical examples and comparisons between the two concepts.

  • 49.
    Göransson, Andreas
    et al.
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, The Institute of Technology.
    Stenlund, Jörgen
    Örebro University.
    Tibell, Lena
    Linköping University, Department of Science and Technology, Media and Information Technology. Linköping University, Faculty of Educational Sciences.
    A Novel Computer Application for Teaching Evolutionary Mechanisms: Visual Analogies of Randomness and Natural Selection2015Conference paper (Refereed)
  • 50.
    Svenaeus, Fredrik
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Department of Health and Society, Tema Health and Society.
    A Phenomenological Analysis of the Concepts of Handicap and Illness2003In: Dimensions of Health and Health Promotion / [ed] Lennart Nordenfelt, Per-Erik Liss, Amsterdam: Rodopi , 2003, 97-109 p.Chapter in book (Other academic)
    Abstract [en]

    This book contains scholarly contributions to several current debates in the philosophy of medicine and health care regarding the nature of health and health promotion, concepts and measurements of mental illness, phenomenological conceptions of health and illness, allocation of health care resources, criteria for proper medical science, the clinical meeting, and ethical constraints in such a meeting.

    With one exception, the authors in this book are or have been teachers or graduate students at the interdisciplinary Department of Health and Society (Tema H) at Linköping University, Sweden. While all the texts have a philosophical focus, many other disciplines have influenced the choice of specific perspectives. The university backgrounds of the authors range from medicine, psychology, sociology, and religion to philosophy. What binds the authors together is their deep interest in the theory of medicine and in the pursuit of a philosophy of humanistic medicine and health care.

1234567 1 - 50 of 1766
CiteExportLink 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