Change search
Refine search result
332333334335336337338 16701 - 16750 of 17397
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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.
  • 16701. Wistbacka, G.
    et al.
    Sundberg, Johan
    KTH, School of Computer Science and Communication (CSC), Speech, Music and Hearing, TMH, Music Acoustics. College of Music Education, Sweden.
    Simberg, S. V.
    Vertical laryngeal position and oral pressure variations during resonance tube phonation in water and in air. A pilot study.2015In: Logopedics, Phoniatrics, Vocology, ISSN 1401-5439, E-ISSN 1651-2022Article in journal (Refereed)
    Abstract [en]

    Resonance tube phonation in water (RTPW) is commonly used in voice therapy, particularly in Finland and Sweden. The method is believed to induce a lowering of the vertical laryngeal position (VLP) in phonation as well as variations of the oral pressure, possibly inducing a massage effect. This pilot study presents an attempt to measure VLP and oral pressure in two subjects during RTPW and during phonation with the free tube end in air. VLP is recorded by means of a dual-channel electroglottograph. RTPW was found to lower VLP in the subjects, while it increased during phonation with the tube end in air. RTPW caused an oral pressure modulation with a bubble frequency of 14-22 Hz, depending mainly on the depth of the tube end under the water surface. The results indicate that RTPW lowers the VLP instantly and creates oral pressure variations.

  • 16702.
    Wittek, Peter
    et al.
    University of Borås, Swedish School of Library and Information Science.
    Darányi, Sándor
    University of Borås, Swedish School of Library and Information Science.
    Liu, Ying-Hsang
    University of Borås, Swedish School of Library and Information Science.
    A Vector Field Approach to Lexical Semantics2014Conference paper (Refereed)
    Abstract [en]

    We report work in progress on measuring "forces" underlying the semantic drift by comparing it with plate tectonics in geology. Based on a brief survey of energy as a key concept in machine learning, and the Aristotelian concept of potentiality vs. actuality allowing for the study of energy and dynamics in language, we propose a field approach to lexical analysis. Until evidence to the contrary, it was assumed that a classical field in physics is appropriate to model word semantics. The approach used the distributional hypothesis to statistically model word meaning. We do not address the modelling of sentence meaning here. The computability of a vector field for the indexing vocabulary of the Reuters-21578 test collection by an emergent self-organizing map suggests that energy minima as learnables in machine learning presuppose concepts as energy minima in cognition. Our finding needs to be confirmed by a systematic evaluation.

  • 16703.
    Wittek, Peter
    et al.
    University of Borås, Faculty of Librarianship, Information, Education and IT.
    Gao, Shi Chao
    Lim, Ik Soo
    Zhao, Li
    Somoclu: An Efficient Parallel Library for Self-Organizing Maps2015Article in journal (Refereed)
    Abstract [en]

    Somoclu is a massively parallel tool for training self-organizing maps on large data sets written in C++. It builds on OpenMP for multicore execution, and on MPI for distributing the workload across the nodes in a cluster. It is also able to boost training by using CUDA if graphics processing units are available. A sparse kernel is included, which is useful for high-dimensional but sparse data, such as the vector spaces common in text mining workflows. Python, R and MATLAB interfaces facilitate interactive use. Apart from fast execution, memory use is highly optimized, enabling training large emergent maps even on a single computer.

  • 16704.
    Wittlock, Fredric
    Blekinge Institute of Technology, Department of Human Work Science and Media Technology.
    "4v4 BGH no comps anyone?" A Study of the Multiplayer Online Lobby2002Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    The industry of games is growing rapidly. The demands for better and better games grow along with it. But it isn?t just the game in itself that fully determines if it is a success or not. There are lots of small surrounding features that also help making a difference in the tough competition. This thesis will look into one of these aspects, the online multiplayer lobby. A study on the lobbies available today will show that they can be improved. Here it will be shown what parts of the lobby that are good and should be developed further. The paper will show what players strive for when they play and socialize in the lobby. This discussion will be followed by several suggestions to show how the lobby can be improved.

  • 16705.
    Wittlock, Fredric
    et al.
    Blekinge Institute of Technology, Department of Human Work Science and Media Technology.
    Hallqvist, Magnus
    Blekinge Institute of Technology, Department of Human Work Science and Media Technology.
    Mutafov, Paula
    Blekinge Institute of Technology, Department of Human Work Science and Media Technology.
    ELF-EAR, Teknik i Levande Rollspel2001Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Vårt mål är att förhöja deltagarnas upplevelse i levande rollspel (även kallat lajv). Idag finns det inga möjligheter att visualisera övernaturliga förmågor. I den här rapporten visar vi ett exempel på hur detta kan realiseras med hjälp av teknik. Vi har inriktat oss på att simulera alvers övernaturliga hörsel. Levande rollspel är mycket känsligt för störningar från ?världen utanför?, exempelvis modern teknik och språk. Vår största utmaning har varit att anpassa tekniken så att den accepteras av lajvare.

  • 16706.
    Wnukiewicz, Karol Kazimierz
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    The role of quality requirements in software architecture design2006Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    An important issue during architectural design is that besides functional requirements, software architecture is influenced greatly by quality requirements [9][2][7], which often are neglected. The earlier quality requirements are considered, the less effort is needed later in the software lifecycle to ensure a sufficient software quality levels. Errors due to lack of their fulfilment are the most expensive and difficult to correct. Therefore, attention to quality requirements is crucial during an architectural design. The problem is not only to gather the system’s quality requirements, but to establish a methodology that helps to deal with them during the software development. Literature has paid some attention to software architecture in the context of quality requirements, but there is still lack of effective solutions in this area. To alleviate the problem, this paper lays out important concepts and notions of quality requirements in a way they can be used to drive design decisions and evaluate the architecture to estimate whether these requirements are fulfilled. Important concepts of software architecture area are presented to indicate how important quality requirements are during the design and what are the consequences of their lack in a software system. Moreover, a quality requirement-oriented design method is proposed as an outcome of the literature survey. This method is a model taking quality requirements into account at first, before the core functionality is placed. Besides the conceptual solution to the identified problems, this paper also suggests a practical method of handling quality requirements during a design. A recommendation framework for choosing the most suitable architectural pattern from a set of quality attributes is also proposed. Since the literature provides insufficient qualitative information about quality requirement issues in terms of software architectures, an empirical research is conducted as means for gathering the required data. Therefore, a systematic approach to support and analyze architectural designs in terms of quality requirements is prepared. Finally, quality requirement-oriented and pattern-based design method is further proposed as a result of investigating patterns as a tool for addressing quality requirements at different abstraction levels of a design. The research is concerned with the analysis of software architectures against one or more desired software qualities that ought to be achieved at the architectural level.

  • 16707. Wohed, P
    et al.
    Andersson, Birger
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Panetto, H
    Facilitating interoperability: A cross-analysis of the language UEML and the standard ISO/DIS 194402006In: BUSINESS PROCESS MANAGEMENT WORKSHOPS / [ed] Bussler, C; Haller, A, BERLIN: SPRINGER-VERLAG BERLIN , 2006, Vol. 3812, 257-268 p.Conference paper (Refereed)
    Abstract [en]

    During recent years Interoperability and Interoperable Enterprise Applications has gained a central place on the IS development arena. Presented in this paper is a cross-analysis of two languages for enterprise modelling and information systems development. The languages are the Unified Enterprise Modelling Language (UEML) and ISO/DIS 19440. The purpose of this cross-analysis is to make the languages more complete and well defined. The analysis includes a mapping between the languages. The results of the analysis can be used for further development of the languages which in the long run will beneficial for the interoperability of enterprises modelled in them.

  • 16708.
    Wohed, Petia
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Russell, Nick
    ter Hofstede, Arthur H. M.
    Andersson, Birger
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    van der Aalst, Wil M. P.
    Open source workflow: A viable direction for BPM? Extended abstract2008In: Advanced Information Systems Engineering, Proceedings / [ed] Bellahsene, Z; Leonard, M, 2008, Vol. 5074, 583-586 p.Conference paper (Refereed)
    Abstract [en]

    With the growing interest in open source software in general and business process management and workflow systems in particular, it is worthwhile investigating the state of open source workflow management. The plethora of these offerings (recent surveys such as [4,6], each contain more than 30 such systems) triggers the following two obvious questions: (1) how do these systems compare to each other; and (2) how do they compare to their commercial counterparts. To answer these questions we have undertaken a detailed analysis of three of the most widely used open source workflow management systems [1]: jBPM, OpenWFE, and Enhydra Shark. Another obvious candidate would have been the open-source workflow management system YAWL ( www.yawlfoundation.org ). However, given the authors’ close involvement in the development of YAWL, we did not include it in our evaluation.

  • 16709.
    Wohed, Petia
    et al.
    KTH, School of Information and Communication Technology (ICT), Computer and Systems Sciences, DSV.
    Van Der Aalst, W. M. P.
    Dumas, M.
    Ter Hofstede, A. H. M.
    Russell, N.
    On the suitability of BPMN for business process modelling2006Conference paper (Refereed)
    Abstract [en]

    In this paper we examine the suitability of the Business Process Modelling Notation (BPMN) for business process modelling, using the Workflow Patterns as an evaluation framework. The Workflow Patterns are a collection of patterns developed for assessing control-flow, data and resource capabilities in the area of Process Aware Information Systems (PAISs). In doing so, we provide a comprehensive evaluation of the capabilities of BPMN, and its strengths and weaknesses when utilised for business process modelling. The analysis provided for BPMN is part of a larger effort aiming at an unbiased and vendor-independent survey of the suitability and the expressive power of some mainstream process modelling languages. It is a sequel to previous work in which languages including BPEL and UML Activity Diagrams were evaluated.

  • 16710.
    Wohlin, Claes
    Blekinge Tekniska Högskola [bth.se], School of Computing.
    Agile Processes in Software Engineering and Extreme Programming2012Collection (editor) (Other academic)
    Abstract [en]

    This book contains the refereed proceedings of the 13th International Conference on Agile Software Development, XP 2012, held in Malmö, Sweden, in May 2011. In the last decade, we have seen agile and lean software development strongly influence the way software is developed. Agile and lean software development has moved from being a way of working for a number of pioneers to becoming, more or less, the expected way of developing software in industry. The topics covered by the selected full papers include general aspects of agility, agile teams, studies related to the release and maintenance of software, and research on specific practices in agile and lean software development. They are complemented by four short papers capturing additional aspects of agile and lean projects.

  • 16711.
    Wohlin, Claes
    et al.
    Blekinge Institute of Technology, School of Computing.
    Runeson, Per
    Höst, Martin
    Ohlsson, Magnus C.
    Regnell, Björn
    Wesslén, Anders
    Experimentation in Software Engineering2012Book (Other academic)
    Abstract [en]

    Like other sciences and engineering disciplines, software engineering requires a cycle of model building, experimentation, and learning. Experiments are valuable tools for all software engineers who are involved in evaluating and choosing between different methods, techniques, languages and tools. The purpose of Experimentation in Software Engineering is to introduce students, teachers, researchers, and practitioners to empirical studies in software engineering, using controlled experiments. The introduction to experimentation is provided through a process perspective, and the focus is on the steps that we have to go through to perform an experiment. The book is divided into three parts. The first part provides a background of theories and methods used in experimentation. Part II then devotes one chapter to each of the five experiment steps: scoping, planning, execution, analysis, and result presentation. Part III completes the presentation with two examples. Assignments and statistical material are provided in appendixes. Overall the book provides indispensable information regarding empirical studies in particular for experiments, but also for case studies, systematic literature reviews, and surveys. It is a revision of the authors’ book, which was published in 2000. In addition, substantial new material, e.g. concerning systematic literature reviews and case study research, is introduced. The book is self-contained and it is suitable as a course book in undergraduate or graduate studies where the need for empirical studies in software engineering is stressed. Exercises and assignments are included to combine the more theoretical material with practical aspects. Researchers will also benefit from the book, learning more about how to conduct empirical studies, and likewise practitioners may use it as a “cookbook” when evaluating new methods or techniques before implementing them in their organization.

  • 16712. Wohlin, Claes
    et al.
    Wnuk, Krzysztof
    Smite, Darja
    Franke, Ulrik
    RISE, Swedish ICT, SICS, Software and Systems Engineering Laboratory.
    Badampudi, Deepika
    Cicchetti, Antonio
    Supporting Strategic Decision-Making for Selection of Software Assets2016In: Software Business. Lecture Notes in Business Information Processing / [ed] Maglyas A., Lamprecht AL., 2016Conference paper (Refereed)
    Abstract [en]

    Companies developing software are constantly striving to gain or keep their competitive advantage on the market. To do so, they should balance what to develop themselves and what to get from elsewhere, which may be software components or software services. These strategic decisions need to be aligned with business objectives and the capabilities and constraints of possible options. These sourcing options include: in-house, COTS, open source and outsourcing. The objective of this paper is to present an approach to support decision-makers in selecting appropriate types of origins in a specific case that maximizes the benefits of the selected business strategy. The approach consists of three descriptive models, as well as a decision process and a knowledge repository. The three models are a decision model that comprises three cornerstones (stakeholders, origins and criteria) and is based on a taxonomy for formulating decision models in this context, and two supporting models (property models and context models).

  • 16713. Wolf, Peter
    et al.
    Barrat, Jordi
    Bolo, Eden
    Bravo, Alejandro
    Krimmer, Robert
    Neumann, Stephan
    Parreño, Al A.
    Schürmann, Carsten
    Volkamer, Melanie
    Certification of ICTs in Elections2015Book (Other academic)
  • 16714.
    Wolosz, Krzysztof
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bodin, Ulf
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Osipov, Evgeny
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Eliasson, Jens
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Embedded Internet Systems Lab.
    Cognitive load-control for congested Wireless Sensor Network channels2013In: 2013 IFIP Wireless Days (WD 2013: Valencia, Spain, 13-15 Nov 2013, Piscataway, NJ: IEEE Communications Society, 2013Conference paper (Refereed)
    Abstract [en]

    Modern wireless sensors transmit at high rates and changing transmission patterns. They may individually or collectively select how much data shall be sent depending on predefined rules tied to properties of measured data. Sending rates thereby change triggered by events appearing in the sensor environment. With wireless technologies such as 802.15.4 (ZigBee) having limited capacity high transmission needs can easily cause overload resulting in decreased throughput. This paper presents a load control mechanism that uses multiple inputs, demand for transmission capacity and perceived quality of each sensor node, to properly configure sending rates of these nodes. The mechanism is based on Fuzzy Logic and quality assessed with utility functions for packet loss and throughput. NS-3 simulation results show clear improvements in overall throughput at high loads with the mechanism compared to without.

  • 16715.
    Wolosz, Krzysztof
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bodin, Ulf
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Riliskis, Laurynas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A measurement study for predicting throughput from LQI and RSSI2012In: Multiple Access Communications: 5th International Workshop, MACOM 2012, Maynooth, Ireland, November 19-20, 2012. Proceedings / [ed] Boris Bellalta, Heidelberg: Encyclopedia of Global Archaeology/Springer Verlag, 2012, 89-92 p.Conference paper (Refereed)
    Abstract [en]

    Wireless sensor networks (WSN) commonly use ZigBee to communicate, especially when low power consumption is demanded. ZigBee may however provide unpredictable throughput although transmission distances are short. This is especially evident in difficult environments with complicated reflections and various materials through which radio signals need to pass through. Distributed scheduling based on cognitive networking principles may improve both network predictability and overall throughput. This paper presents measurements of key parameters for such cognitive scheduling, and discusses their potential for predicting suitable per-node transmission rates. Results include variability of throughput, RSSI and LQI observed for different transmission powers, transmission ranges, and number of transmitting nodes.

  • 16716.
    Wolosz, Krzysztof
    et al.
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Bodin, Ulf
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Riliskis, Laurynas
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    A measurement study of predicting throughput from LQI and RSSI2012Report (Other academic)
    Abstract [en]

    Wireless sensor networks (WSN) commonly use ZigBee tocommunicate, especially when low power consumption is demanded. Zig-Bee may however provide unpredictable throughput although transmis-sion distances are short. This is especially evident in difficult environ-ments with complicated reflections and various materials through whichradio signals need to pass through. Distributed scheduling based on cog-nitive networking principles may improve both network predictabilityand overall throughput. This paper presents measurements of key pa-rameters for such cognitive scheduling, and discusses their potential forpredicting suitable per-node transmission rates. Results include variabil-ity of throughput, RSSI and LQI observed for different transmission pow-ers, transmission ranges, and number of transmitting nodes.

  • 16717.
    Woltjer, Rogier
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    A systemic functional resonance analysis of the Alaska Airlines flight 261 accident2007In: Swedish Human Factors Network HFN Conference,2006, Linköping: HFN , 2007, 83-93 p.Conference paper (Other academic)
  • 16718.
    Woltjer, Rogier
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Resilience assessment based on models of functional resonance2008In: Symposium on Resilience Engineering,2008, Sophia Antipolis: MINES ParisTech , 2008Conference paper (Other academic)
    Abstract [en]

    Both practitioners and scholars with an interest in Resilience Engineering have expressed the need for model- or process-based methods for the assessment of resilience. This paper explores the potential of the Functional Resonance Analysis Method (FRAM; Hollnagel, 2004) to address five key resilience characteristics (buffering capacity, flexibility, margin, tolerance, and cross-scale interactions, as identified by Woods, 2006). Application of FRAM to the Alaska Airlines flight 261 accident and application and evaluation of these resilience characteristics to the functional model shows that FRAM to some extent allows for resilience assessment through these characteristics. Moreover, FRAM-based assessment of resilience challenges the description and definition of these characteristics and enables to ask some specific questions that further develop their assessment.

  • 16719.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Modelling and evaluation of air traffic management automation using the functional resonance analysis method2008In: International Symposium of the Australian Aviation Psychology Association AAvPA,2008, Sydney: Australian Aviation Psychology Association , 2008Conference paper (Other academic)
  • 16720.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    The Alaska Airlines Flight 261 accident: A systemic analysis of functional resonance2007In: International Symposium on Aviation Psychology ISAP,2007, Dayton, OH: Wright State University , 2007, 763- p.Conference paper (Refereed)
    Abstract [en]

    On January 31, 2000, Alaska Airlines flight 261, an MD-83, crashed into the Pacific Ocean; after airplane pitch control was lost as a result of the in-flight failure of the horizontal stabilizer trim system jackscrew assembly's acme nut threads (NTSB, 2003). Accident investigation revealed a wide range of human, technical, and organizational factors contributing to this tragic event, providing a case where popular linear models and methods have difficulty addressing the full complexity of the processes leading up to the accident. This paper treats each of the steps of analysis according to the Functional Resonance Accident Model (FRAM; Hollnagel, 2004), a systemic non-linear modeling method, and discusses how functional resonance occurred through the variability in functions performed by joint human, technical, and organizational systems. It thereby aims to facilitate a better understanding of how functional variability in design, certification, limited and inadequate maintenance, negligent safety culture, economic factors, and human performance together can resonate and contribute to accidents. In this way it aims to contribute to accident prevention and the engineering of more resilient complex dynamic systems.

  • 16721.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Johansson, BjörnLinköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.Lundberg, JonasLinköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group.
    Proceedings of the Resilience Engineering Workshop, 25-27 June, 2007, Vadstena, Sweden2007Collection (editor) (Other academic)
    Abstract [en]

    Resilience Engineering is a new approach to safety and risk management. Whereas conventional approaches to system safety are dominated by hindsight and emphasize error tabulation and probabilistic risk analysis, Resilience Engineering emphasizes an organisations ability to adjust its functioning, prior to or following changes and disturbances, so that it can sustain operations even after a major mishap or in the presence of continuous stress.

    A common description of a resilient system is a system that has:

    • the ability to respond, quickly and efficiently, to regular disturbances and threats,
    • the ability to monitor continuously for irregular disturbances and threats, and to revise the basis for monitoring when needed, and
    • the ability to anticipate future changes in the environment that may affect the system’s ability to function, and the willingness to prepare against these changes even if the outcome is uncertain.

    Resilience engineering provides the methods by which a system’s resilience can be gauged or measured, and the means by which a system’s resilience can be improved. Resilience has for many decades proven to be a useful construct in analyzing the persistence, stability and flexibility of ecological systems.

    The Resilience Engineering workshop is organised by the Cognitive Systems Engineering Laboratory at the Department of Computer and Information Science, Linköping University. The workshop is an opportunity to discuss Resilience Engineering and its implications for research and practice in, among other disciplines, system safety, risk analysis, system design, and accident analysis

  • 16722.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Lindgren, Ida
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Industrial ergonomics .
    Smith, Kip
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Information and communication technology in collocated emergency management training2007In: Swedish Human Factors Network HFN Conference,2006, Linköping: HFN , 2007, 94-102 p.Conference paper (Other academic)
  • 16723.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Smith, Christian Skinner
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Industrial Ergonomics.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Constraint recognition, modeling, and visualization in network-based command and control2006In: International Command and Control Research and Technology Symposium ICCRTS,2006, Cambridge, UK: CCRP , 2006Conference paper (Refereed)
    Abstract [en]

    This paper describes a method for the recognition of constraints in network-based command and control, and illustrates its application in a command and control microworld. The method uses Hollnagel-s functional resonance analysis to extract the essential variables that describe the behavior of a command and control team. It juxtaposes these variables in state space plots that explicitly represent constraints and defines regions associated with alternative opportunities for action. Examples show how state space plots of experimental data can aid in the description of behavior vis-à-vis constraints. We discuss how state space representations could be used to improve control in network-based command and control settings.

  • 16724.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Smith, Kip
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Industrial Ergonomics.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Constraint recognition and state space representation in collaborative distributed command and control2007In: Swedish Human Factors Network HFN Conference,2006, Linköping: HFN , 2007, 72-82 p.Conference paper (Other academic)
  • 16725.
    Woltjer, Rogier
    et al.
    Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory. Linköping University, The Institute of Technology.
    Trnka, Jiri
    Linköping University, Department of Computer and Information Science, GIS - Geographical Information Science Group. Linköping University, The Institute of Technology.
    Lundberg, Jonas
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Johansson, Björn
    Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory. Linköping University, The Institute of Technology.
    Role-Playing Exercises to Strengthen the Resilience of Command and Control Systems2006In: ECCE '06 Proceedings of the 13th Eurpoean conference on Cognitive ergonomics: trust and control in complex socio-technical systems / [ed] Antonio Rizzo; Gudela Grote; William B L Wong, NY, USA: ACM Press, 2006, 71-78 p.Conference paper (Refereed)
    Abstract [en]

    In this paper, we describe how role-playing exercises can be used to strengthen the resilience of command and control systems in emergency management. Through role-playing exercises, the participants gain experience with adapting to changing demands and risk relative to challenges to their ability to predict future risk, adapt, and recover from harmful events. Role-playing exercises at the same time enable researchers to analyse how resilient behaviour emerges, or how the resilience of complex socio-technical systems may be improved. Two role-playing exercises, one concerning forest fire fighting, the other concerning power grid restoration, are discussed to illustrate these concepts.

  • 16726.
    Woltjer, Rogier
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Woltjer, Rogier
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Smith, Kip
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Smith, Kip
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Functional modeling and constraint management in command and control: two microworld studies2007In: IFAC/IFIP/IFORS/IEA Symposium on Analysis, Design, and Evaluation of Human-Machine Systems IFAC-HMS,2007, Seoul, Korea: IFAC , 2007Conference paper (Refereed)
  • 16727.
    Wong, Bonny
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Boldt-Christmas, Axel
    KTH, School of Computer Science and Communication (CSC).
    A study of algorithms for 2-dimensional self-assembly in swarm robotics2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Intelligent Control is a novel way to solve problems involving the control of complex systems in many areas. Among these areas are multi-robot systems. Swarm robotics is a multi-robot system that is inspired by natural swarms such as ones found among social insects.

    One of the problems found within swarm robotics involves the forming of geometrical shapes in 2D-space through local interactions. This thesis has taken an existing solution to the shape forming problem and addressed some of the limitations of it. Through the use of a computer simulation, a swarm robotic system using these improvements were simulated and yielded positive results.

  • 16728. Wong, Kwan-Yee Kenneth
    et al.
    Zhang, Guoqiang
    Chen, Zhihu
    KTH, School of Electrical Engineering (EES), Sound and Image Processing (Closed 130101).
    A Stratified Approach for Camera Calibration Using Spheres2011In: IEEE Transactions on Image Processing, ISSN 1057-7149, E-ISSN 1941-0042, Vol. 20, no 2, 305-316 p.Article in journal (Refereed)
    Abstract [en]

    This paper proposes a stratified approach for camera calibration using spheres. Previous works have exploited epipolar tangents to locate frontier points on spheres for estimating the epipolar geometry. It is shown in this paper that other than the frontier points, two additional point features can be obtained by considering the bitangent envelopes of a pair of spheres. A simple method for locating the images of such point features and the sphere centers is presented. An algorithm for recovering the fundamental matrix in a plane plus parallax representation using these recovered image points and the epipolar tangents from three spheres is developed. A new formulation of the absolute dual quadric as a cone tangent to a dual sphere with the plane at infinity being its vertex is derived. This allows the recovery of the absolute dual quadric, which is used to upgrade the weak calibration to a full calibration. Experimental results on both synthetic and real data are presented, which demonstrate the feasibility and the high precision achieved by our proposed algorithm.

  • 16729.
    Wong, Kwok-Leung
    et al.
    Linköping University, Department of Science and Technology.
    Nilsson, Fredrik
    Linköping University, Department of Science and Technology.
    Intelligent resource handling scheduling of automated test execution2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The unit RTH, Radio Access Network Transmission and Home at Ericsson site in Linkoping uses today different test tool which are divided between different projects. Today they do not have any optimal solution for in an easy way execute the test cases from different projects concurrently, and share the test tools between the these projects.

    All the execution of test cases which a test tool is needed needs to be configured and started manually which cost both time and money. Since the test tools are very expensive to use, it is desirable to increase the utilization. The purpose of this thesis is to provide RTH a working prototype which can in an intelligent way schedule and then automatically execute the test cases. The prototype shall consist of a web user interface and a scheduler part. The web user interface is going to be that part which the user works in, and the scheduler handles the prioritization and make sure that the test cases are executed.

    To reach the goal with a working prototype, PHP and Java were picked as framework for the prototype. The theory behind these programming languages and more can be read in the theory chapter, and all the different methods which were used. The result of the working process can be read in the Result chapter.

    The end prototype fulfills the customer’s requirement. Improvement and new functionalities are given as suggestion at the end of this thesis, where we also discuss the working process.

  • 16730.
    Wong, Leung
    Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
    Analysis of NoSQL Storage in the Cloud2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Data storage is essential in many Internet services today. As the amountof generated data increases every day a way to store is needed. Relationaldatabases do not handle continuous growing data well. An option to it is touse NoSQL. XDIN Link¨ping is interested in developing an Internet serviceowhich uses non-relational type of data storage to store structured data. Thedata should be accessible to members of the service. The data storage doesnot make any assumption on what type of data is stored. Instead tags thatare attached to each entity are used to verify what type of data it is stored.This thesis provides a description of what NoSQL is and along with it theproposed database designs. Further it aims to investigate if it is reasonableto create a web service which uses NoSQL as the backend storage.

  • 16731.
    Wong, Mark
    KTH, School of Computer Science and Communication (CSC).
    Comparison of heat maps showing residence price generated using interpolation methods2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In this report we attempt to provide insights in how interpolation can be used for creating heat maps showing residence prices for different residence markets in Sweden. More specifically, three interpolation methods are implemented and are then used on three Swedish residence markets. These three residence markets are of varying characteristics such as size and residence type. Data of residence sales and the physical definitions of the residence markets were collected. As residence sales are never identical, residence sales were preprocessed to make them comparable. For comparison, a so-called external predictor was used as an extra parameter for the interpolation method. In this report, distance to nearest public transportation was used as an external predictor.

    The interpolated heat maps were compared and evaluated using both quantitative and qualitative approaches. Results show that each interpolation method has its own strengths and weaknesses, and that using an external predictor results in better heat maps compared to only using residence price as predictor.

    Kriging was found to be the most robust method and consistently resulted in the best interpolated heat maps for all residence markets. On the other hand, it was also the most time-consuming interpolation method.

  • 16732.
    Wong, Mark
    et al.
    KTH, School of Computer Science and Communication (CSC).
    Alam, Samiul
    KTH, School of Computer Science and Communication (CSC).
    Sudokulösare: Jämförelse av körtider för backtracking och mänskliga strategier2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Sudoku solvers are a widely researched topic among mathematicians and computer scientists. This report investigates the differences in execution time and time complexity between backtracking and human strategies for classes with 17-21 clues. Backtracking is compared to our implementation of human strategies with test data that contains 99 Sudoku puzzles for each class. The study shows that the execution time and time complexity is improved for human strategies compared to backtracking for each class. The conclusion shows that it is always favorable to implement the human strategies investigated in the report. 

  • 16733.
    Wong, Teddy
    et al.
    Linnaeus University, Faculty of Technology, Department of Computer Science.
    Uggla, Fred
    Linnaeus University, Faculty of Technology, Department of Computer Science.
    Integritet och Medvetenhet på internet: Beteendespårning och dess konsekvenser2015Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Diskussionen om personlig integritet, anonymitet och säkerhet på internet är idagväldigt aktuell. En konsekvens av ny teknik och de större vinstmöjligheter som finnsi IT-branschen skapar efterfrågan på analys av internetanvändare. Datainsamlingensker via sociala medier, sökmotorer och genom dolda dörrar in till användaresprivatliv. Uppsatsen analyserar ett antal olika tekniker för hur information samlas in.Syftet är att svara på hur spårning och profilering sker genom datainsamling. I enenkät frågas användare om de är medvetna om datainsamlingen, och de får ävensvara på hur de ställer sig till den information som presenteras i enkäten. Vidaretestas och analyseras flera verktyg som kan blockera olika typer av datainsamling.

  • 16734.
    Woods, David D.
    et al.
    CSEL The Ohio State University.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Joint cognitive systems: Patterns in cognitive systems engineering2006Book (Other academic)
    Abstract [en]

    Our fascination with new technologies is based on the assumption that more powerful automation will overcome human limitations and make our systems 'faster, better, cheaper,' resulting in simple, easy tasks for people. But how does new technology and more powerful automation change our work? Research in Cognitive Systems Engineering (CSE) looks at the intersection of people, technology, and work. What it has found is not stories of simplification through more automation, but stories of complexity and adaptation. When work changed through new technology, practitioners had to cope with new complexities and tighter constraints. They adapted their strategies and the artifacts to work around difficulties and accomplish their goals as responsible agents. The surprise was that new powers had transformed work, creating new roles, new decisions, and new vulnerabilities. Ironically, more autonomous machines have created the requirement for more sophisticated forms of coordination across people, and across people and machines, to adapt to new demands and pressures. This book synthesizes these emergent Patterns though stories about coordination and mis-coordination, resilience and brittleness, affordance and clumsiness in a variety of settings, from a hospital intensive care unit, to a nuclear power control room, to a space shuttle control center. The stories reveal how new demands make work difficult, how people at work adapt but get trapped by complexity, and how people at a distance from work oversimplify their perceptions of the complexities, squeezing practitioners. The authors explore how CSE observes at the intersection of people, technology, and work, how CSE abstracts patterns behind the surface details and wide variations, and how CSE discovers promising new directions to help people cope with complexities. The stories of CSE show that one key to well-adapted work is the ability to be prepared to be surprised. Are you ready?

  • 16735.
    Woods, David D.
    et al.
    CSEL The Ohio State University.
    Hollnagel, Erik
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory.
    Prologue: Resilience Engineering Concepts2006In: Resilience engineering: Concepts and precepts / [ed] Erik Hollnagel, David D. Woods, Nancy Leveson, Aldershot, UK: Ashgate , 2006, -397 p.Chapter in book (Other academic)
    Abstract [en]

    For Resilience Engineering, 'failure' is the result of the adaptations necessary to cope with the complexity of the real world, rather than a breakdown or malfunction. The performance of individuals and organizations must continually adjust to current conditions and, because resources and time are finite, such adjustments are always approximate. This definitive new book explores this groundbreaking new development in safety and risk management, where 'success' is based on the ability of organizations, groups and individuals to anticipate the changing shape of risk before failures and harm occur. Featuring contributions from many of the worlds leading figures in the fields of human factors and safety, "Resilience Engineering" provides provocative insights into system safety as an aggregate of its various components, subsystems, software, organizations, human behaviours, and the way in which they interact. The book provides an introduction to Resilience Engineering of systems, covering both the theoretical and practical aspects. It is written for those responsible for system safety on managerial or operational levels alike, including safety managers and engineers (line and maintenance), security experts, risk and safety consultants, human factors professionals and accident investigators.

  • 16736.
    Wordoffa, Henok
    et al.
    Blekinge Institute of Technology, School of Computing.
    Wangoria, Ezedin
    Blekinge Institute of Technology, School of Computing.
    Alzheimer's Disease Stage Prediction using Machine Learning and Multi Agent System2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Context : Alzheimer's disease is a memory impairment disease which mostly affects elderly people. Currently, about 4 million Americans and 5 million Europeans are affected by this disease. The occurrence of Alzheimer's disease is expected to quadruple by the year 2020. Alzheimer's disease cannot be cured or stopped its progression rather delay its progression. Early diagnosis of the disease helps the patients, the caregivers and health institutions to save time, cost and minimize patients suffering. Objectives : In this thesis, different machine learning algorithms used for classification purpose are evaluated and various Alzheimer's disease diagnosis techniques are identified. Among these algorithms, a suitable classifier that has better classification accuracy on the National Alzheimer Coordinating Center (NACC) dataset is selected. This classifier is customized in order to make it compatible for the NACC dataset and to receive the new instance from the user. Then a multi-agent system model is develop that can improve the classification accuracy. Methods : Different research works are reviewed and experiments are conducted throughout this research work. A dataset for this research is obtained from National Alzheimer's Coordinating Center, university of Washington. Using this dataset, two experiments are conducted in WEKA. In the first experiment, the five candidate algorithms are compared to select the significant classifier for medical history and cognitive function data. For the second experiment, two datasets are used; a dataset contains Medical History (MH) with Cognitive Function (CF) data and a dataset that contains only medical history data to check in which dataset the selected classifier has better accuracy. Results : From the first experiment, J48 classifier has a better stage prediction accuracy than the candidate algorithms with 61.12%. J48 is customized to classify a new instance received from the user and to improve the classification accuracy. Then the accuracy increase to 87.09% when the classifier's parameters are optimized. When the medical history and cognitive function data is experimented in WEKA separately, the classification accuracies of J48 on MH, CF and their combination datasets are 81.42%, 64.20% and 87.09% respectively. The agents simulation result showed that some misclassified instances by J48 algorithm can be corrected by using multi agent system. The experimental results are presented in graphical format. Conclusions : Hence we conclude that machine learning and agent system in combination can be used for Alzheimer's disease diagnosis and its stage prediction by extracting knowledge from a dataset which contains patients medical history and cognitive function data.

  • 16737.
    Woxberg, Lars
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Grahn, Stefan
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Maritime Anomaly Detection with Dynamic Potential Field Grids2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Context. Safety and security in the maritime domain is an important area and systems designed to aid in detecting illegal or dangerous situations are desired. With the advent of Automatic Identification Systems (AIS), information about marine traffic is in abundance and the challenge is in finding events of interest; to which a common approach is to find vessels behaving anomalously.

    Objectives. This study extends previous work by Osekowska et al. who used potential fields to condensate AIS data into a unified pattern. The challenge in this method is the configuration of grid precision. Through the use of quadtrees, this thesis presents a new implementation that intends to alleviate this problem by allowing dynamic grid resolution.

    Methods. Experiments are conducted to compare the new implementation to the existing one. Both algorithms are tested in areas with dense, sparse and mixed traffic density. Additionally, the implementations are validated against real anomaly data and a set of traffic data containing no confirmed anomalies.

    Results. While the new algorithm does not work exactly like the existing implementation in dense and sparse areas, it is shown to be able to detect 8/9 real anomalies while detecting 20.1\% false positives. The existing implementation either finds 5/9 of the real anomalies and 8.3\% false positives with a large cell size or 7/9 real anomalies and 44.4\% false positives with a small cell size.

    Conclusions. The new algorithm finds more real anomalies, especially compared to when using a large cell size. It finds fewer false positives than when using small cells, but not quite as few as with large cells. The anomaly missed by the new algorithm is likely due to the fact that traffic patterns have changed after the training data was collected, and it is possible that it would have been found with more up-to-date training data. This thesis is a pre-study of the presented method and provides incentive for future investigation. 

  • 16738.
    Woxberg, Thomas
    et al.
    Linköping University, Department of Computer and Information Science.
    Wilhelmsson, Gustav
    Linköping University, Department of Computer and Information Science.
    TUCS: En sammankoppling av Visma SPCS och MS Outlook2006Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [sv]

    Målet med vårt examensarbete har varit att på uppdrag från United Computer Systems skapa ett program som kopplar samman Visma SPCS och MS Outlook. Anledningen till detta program har varit att utöka den begränsade kontakthanteringen som finns i Visma SPCS. I större affärssystem blir det allt vanligare att så kallade CRM system integreras. Dock saknas oftast bra kontakthantering i lösningar som riktar sig till mindre företag. Genom att koppla samman SPCS med Outlook, ger det användaren möjligheter att lagra mer djupgående information om kunder, deras kontaktpersoner och leveransadresser.

    Programmet har utformats i Borland Delphi och vi beskriver i denna rapport hur vi gått till väga för att skapa ett program som uppfyller vår uppdragsgivares önskemål vad gäller användbarhet och användarvänlighet.

    Vi beskriver även några av de grundläggande begreppen för vårt projekt, så som Screen scraping och API för SPCS och Windows.

  • 16739. Woxenius, Johan
    Generic framework for transport network designs: applications and treatment in intermodal freight transport literature2007In: Transport reviews, ISSN 0144-1647, E-ISSN 1464-5327, Vol. 27, no 6, 733-749 p.Article in journal (Refereed)
    Abstract [en]

    Six principles for the design of transport systems are described, including direct link, corridor, hub-and-spoke, connected hubs, static routes, and dynamic routes. The designs are theoretically discussed, defining the operational character of each design and their application in passenger, freight and rail freight transport. The theory is then applied to intermodal freight transport by comparing the terminology used in the paper with that in the scientific literature. The advantages of using a generic terminology over contextual ones are identified from the perspectives of researchers, commercial operators and policy-makers.

  • 16740. Woxenius, Johan
    Intermodal freight transport network designs and their implication for transhipment technologies2007In: European Transport / Trasporti Europei, ISSN 1825-3997, E-ISSN 2283-5520, no 35, 27-45 p.Article in journal (Refereed)
  • 16741. Woxenius, Johan
    Temporal elements in the spatial extension of production networks2006In: Growth and Change, ISSN 0017-4815, E-ISSN 1468-2257, Vol. 37, no 4, 526-549 p.Article in journal (Refereed)
  • 16742. Woxenius, Johan
    et al.
    Persson, Jan A.
    Davidsson, Paul
    Measures for increasing the loading space utilisation of intermodal line train systems2007Conference paper (Refereed)
  • 16743.
    Woxenius, Johan
    et al.
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan A.
    Blekinge Institute of Technology, School of Computing.
    Davidsson, Paul
    Blekinge Institute of Technology, School of Computing.
    Utilising more of the loading space in intermodal line trains-Measures and decision support2013In: Computers in industry (Print), ISSN 0166-3615, E-ISSN 1872-6194, Vol. 64, no 2, 146-154 p.Article in journal (Refereed)
    Abstract [en]

    The focus of this article is to identify, characterise and qualitatively evaluate the existing measures for increasing the utilisation of loading space in intermodal road-rail freight line trains. Normally, these trains operate like intercity passenger trains, because they make short unit load transhipment stops along rail corridors in order to travel comparatively small and short flows. The measures for loading space utilisation include adapting the train's capacity, changing the departure times, altering the train routes and sending trucks to different terminals as well as replacing rail transport with trucks. Some of the measures require improved information sharing, and executives can strengthen the effect of the measures by adding decision support systems and price incentives to transport buyers.

  • 16744.
    Wramner, Henrik
    KTH, School of Computer Science and Communication (CSC).
    Tracking Users on the World Wide Web.2011Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The current dominant business model of the web are financing website content with advertisements. Advertisers usually only pay if an ad view or ad click results in a subsequent purchase by the web site visitor. In order to detect which web sites led the visitor to a final purchase, it is necessary to track web user actions. The current used methods of tracking web users are identifed as a basic form of browser fingerprinting and also by using HTTP cookies. These two tracking methods are shown to face a downward trend of becoming less able to track web user actions.

    In this degree project several other potential methods of web user tracking are developed. Some of the tracking methods are also implemented as prototypes and subsequently evaluated. The evaluation shows that all implemented methods are able to successfully track some subset of all web users actions. The conclusion is that tracking web users by using the web browser cache is the best tracking method found in this degree project. The reasons are that this method can track a large share of user actions, it causes minor customer effects and also minor server side effects for the company performing the tracking.

  • 16745.
    Wrege, Marcus
    University of Skövde, Department of Computer Science.
    Utvärdering av hur moderna databasprodukter möter kraven på tredje generationens databaser2000Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Databaser är vanligt förekommande i vardagen på företag och organisationer. De mer objektorinterade krav som idag ställs på vad en databas bör klara av att hantera, har med ökad datakapacitet gjort att mer komplexa dataobjekt måste kunna hanteras i databasen.

    1990 skrevs ett manifest av den tidens ledande databasforskare om vad de ansåg att den tredje generationens databaser borde ha för funktionalitet. I detta arbete undersöks det huruvida dagens moderna relationsdatabasprodukter klarar av att hantera de krav som ställdes i manifestet på vad den tredje generationens databaser borde klara av.

    Arbetet utgår ifrån manifestets krav och utförs med hjälp av en kombination av metoderna litteraturstudie och implementation. Fokus har lagts på att hitta en lösning i litteraturen för att om möjligt visa med kodexempel hur det kan se ut i en praktisk lösning.

  • 16746.
    Wreiner, Thomas
    et al.
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Mårtensson, Ingrid
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Arnell, Olof
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Gonzàlez, Natalia
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Holmlid, Stefan
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Segelström, Fabian
    Linköping University, Department of Computer and Information Science, MDI - Interaction and Service Design Research Group. Linköping University, The Institute of Technology.
    Exploring Service Blueprints for Multiple Actors: A Case Study of Car Parking Services2009In: First Nordic Conference on Service Design: Oslo, Norway, 23-26 november 2009, Linköping University Electronic Press , 2009Conference paper (Refereed)
    Abstract [en]

    Service blueprints are usually included in listings of standard methods within service design. Still; little research has been conducted on service blueprints. The case study at hand explores how blueprints can be applied in a situation with three key actors; all with different motives and wishes. The case study is within the domain of car parking; a service which at a first glance may seem simple; but is rather complex when scrutinized. Three ways of blueprinting the situation are presented and discussed in the paper. Finally issues which arose from the blueprinting process are discussed in regard to implications for people creating blueprints.

  • 16747.
    Wren, Joakim
    Linköping University, Department of Management and Engineering, Applied Thermodynamics and Fluid Mechanics. Linköping University, Faculty of Science & Engineering.
    ENGINEERING THERMODYNAMICS IN THE 21ST CENTURY: ACTIVE LEARNING BY HUMAN BODY THERMODYNAMICS2015In: 2015 IEEE CONFERENCE ON COMPUTER VISION AND PATTERN RECOGNITION (CVPR), IEEE , 2015Conference paper (Refereed)
    Abstract [en]

    A new project on human body thermodynamics was developed and used in traditional engineering thermodynamics courses. The aim was to increase student motivation and learning by making the students more active and in charge of their learning, and to widen the application of thermodynamics outside the engineering field. The students and teachers experiences were investigated using a combination of questionnaires and interviews. It was found that the students were relatively satisfied with the project, although there was a relatively large spreading in the group. The teachers noticed a clear difference regarding the questions asked and the discussions that took place when comparing the project with traditional lessons/lectures. Altogether, the project was found to have benefits from both motivation and learning perspectives.

  • 16748.
    Wretlind, Kristoffer
    Dalarna University, School of Technology and Business Studies, Computer Engineering.
    Separation av resurser i molntjänstarkitekturer: Separation of Resources in Cloud Architectures2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Molnet är ett evolutionärt koncept som erbjuder en konkurrenskraft – och kostnadskontroll för företag

    genom att integrera olika och existerande teknik. Molnet avser både applikationer som levereras som

    tjänst över Internet, och hårdvara – och mjukvara som tillhandahålls i dessa tjänster. För att kunna dra

    nytta av pris – och prestationsfördelar som molnet erbjuder innebär det att resurser är konsoliderade

    mellan flera kunder i samma infrastruktur. Det är med hänsyn till en konsoliderad miljö som isolering

    av kunders resurser är särskilt viktigt att beakta. Syftet med min studie är att identifiera de risker

    gällande separation av resurser som medföljer en molnbaserad infrastruktur, och lyfta fram olika

    mekanismer för att säkert tillgodogöra behovet, samt att belysa homomorfisk kryptering som en

    separationsmekanism. I uppsatsens litteraturstudie presenterar jag de väsentliga risker som gäller

    separation av resurser från andra kunder och från leverantören, och vanligt förekommande logiska

    separationsmekanismer och deras funktioner som riskåtgärder för de presenterade riskerna. Läran om

    kryptografi sammanfattas i syftemål att presentera homomorfisk kryptering och dess anknytning till

    resursseparation. Litteraturstudier och intervjuer med såväl kunder som leverantörer av molntjänster

    har berett mig ett underlag för att kunna utvärdera de presenterade mekanismerna. Studiens resultat

    visade att stark isolering från andra kunder kan uppnås, men att det är problematiskt att fullständigt

    separera resurser från leverantören. Resultatet har dessutom visat att krypteringsalgoritmer som är

    homomorfiska kan vara säkra men brister i dess ineffektivitet att praktiskt kunna tillämpas.

  • 16749.
    Wrigstad, Tobias
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computing Science.
    Structured Aliasing2013In: Aliasing in Object-Oriented Programming: Types, Analysis, and Verification / [ed] Dave Clarke, James Noble, Tobias Wrigstad, Springer Berlin/Heidelberg, 2013, 512-513 p.Chapter in book (Refereed)
  • 16750.
    Wrigstad, Tobias
    Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computing Science.
    Structured Aliasing2012In: ECOOP 2012 – Object-Oriented Programming, Springer Berlin/Heidelberg, 2012, Vol. 7313, 232-232 p.Conference paper (Refereed)
332333334335336337338 16701 - 16750 of 17397
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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