miun.sePublications
Change search
Refine search result
3456789 251 - 300 of 1517
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)
  • Disputation date (earliest first)
  • Disputation date (latest 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)
  • Disputation date (earliest first)
  • Disputation date (latest 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.
  • 251. Danielsson, Mats
    et al.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Method for decision and risk analysis in probabilistic and multiple criteria situations2005Patent (Other (popular scientific, debate etc.))
    Abstract [en]

    A computer-implemented decision device and a family of methods and procedures are used for representing and analyzing imprecise, vague, and incomplete probabilistic decision and risk problems and/or when a criteria hierarchy is present. Decision makers can state the problems simply with the precision the decision-makers feel they have evidence for. Probabilities, values (utilities), criteria weights with belief distributions over them, and optimization procedures for fast evaluation of decision rules with respect to such statements are determined and analyzed.

  • 252. Danielsson, Mats
    et al.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Johansson [Idefeldt], Jim
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Larsson, Aron
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Investment Decision Analysis: a case study at SCA Transforest2003In: IKE'03: Proceedings of the international conference on infomration and knowledge engineering: Vols. 1 and 2, 2003, p. 79-85Conference paper (Other scientific)
    Abstract [en]

    In investment decision-making in organizations, large values can be at stake. The need for a structured process is evident, not least when several people or interests are involved in the process. We advocate that the use of modern computational decision analysis can improve such investment processes by improving visibility and only requiring reasonably precise input data. The applicability of a structured decision analysis to corporate decision-making is demonstrated in a case study at SCA Transforest, a subdivision to SCA. The decision problem consists of whether a new system for logistic control should be implemented or not. The background information was collected through interviews and the structuring and analysis of the problem was performed using the tool DecideIT, designed for handling situations where uncertainties in input data prevail. The result of the analysis points out a reasonable action, but also shows which aspects are crucial to consider for a reliable result.

  • 253.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Arbetstid - Fritid, var går gränsen?: Sundsvall 422005Conference paper (Other scientific)
    Abstract [sv]

    Idag använder vi informationsteknologin i hög grad, både inom vårt arbetsliv och i vårt privatliv. Inom flera yrkesgrupper blir det allt svårare att dra tydliga gränser mellan arbetstid och fritid. I mitt arbete fokuserar jag på att analysera sampel mellan människa och IT, gällande efttekter på hälsa och invidens möjlighet och behov av att kunna sätta gränser mellan yrkesroll och privatroll.

  • 254.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    High school students - Relationship between ICT and psychosocial life environment2007In: Proceedings at IRIS Information system Research seminar in Scandinavia 30, Tampere, Finland, 2007Conference paper (Refereed)
  • 255.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Learning in networks1999In: Proceedings of HCI Human Computer Interaction International: Vol 2, 1999, p. 407-411Conference paper (Refereed)
  • 256.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Office design: Sundsvall 422006Conference paper (Other scientific)
    Abstract [sv]

    Med denna föreläsning vill jag skapa en förståelse om hur vi förändrar våra liv när vi utvecklar tekniken. Utifrån vad vi idag kan se om hur olika yrkesgrupper erfar att deras gränsdragning mellan yrkesroll och privatroll allt mer suddas ut, anser jag att detta är ett intressant område att studera. Jag har därmed under ca 10 år studerat olika yrkesgrupper och hur deras miljöer och roller har ändras i och med att tekniken har utvecklats.

  • 257.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Relationships between information communication technology and psychosocial life environment: Students and young urban knowledge workers in the ICT-era2007Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Dramatic changes have been taking place in our ways of working and spending leisure time. This relates to the increasing use of ICT (Information Communication Technology) in our lives and is of crucial importance to our future. Today, being physically away from the workplace doesn�t mean that we are necessarily leaving our work tasks behind in psychological terms. The aim of the thesis is to attain a deeper understanding of the relationships between individuals� psychosocial life environment and their use of ICT in order to contribute to the discussion about how everyday use of ICT can affect us. The research is based on two case studies that are presented in research articles. A theoretical framework concerning psychosocial life environment and use of ICT was built upon a review of the literature on environment/role, their relationship to ICT and the boundaries within different roles and environments. The first results in this thesis show that the blurred boundaries between work and leisure begin in school and then continue on into working life. The second result present the different barriers to young women seeking professional roles in the IT-business and the sometimes overlooked fact that every individual has a need to feel needed regardless of whether it is the private or professional role. The third results show that the daily use of ICT creates both needs and activities, but it appears that a sense of lack of control leaves the user feeling negatively stressed. Finally, one example of further research could focus on determining what is the responsibility of the leader of an organization who requires an employee to be reachable any time anywhere?

  • 258.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Unga IT-människor i storstad: en studie inom projektet "Home of the future"2002Report (Other academic)
  • 259.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Young urban knowledge workers - in the IT-business.: IRIS 252002Conference paper (Other scientific)
  • 260.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Young urban knowledge workers - Relationship between ICT and psychosocial life environment.2003In: Proceeding of HCI Human Computer Interaction International 2003 July, Krete, Greece. Vol 3: HCI International 2003, 2003, p. 941-945Conference paper (Other academic)
  • 261.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Young women and barriers to enter IT-professional rolesManuscript (preprint) (Other academic)
  • 262.
    Danielsson, Ulrika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Youth in Cyberspace2000In: Proceedings of IRIS Information System Research Seminar 23: IRIS 23, Trollhättan, 2000, p. 1057-1064Conference paper (Other academic)
  • 263.
    Danielsson, Ulrika
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Danielsson, K
    The interaction between ICT and psychosocial life environment. From young urban knowledge workers to students in school.: Short research article and poster2005In: Proceedings of Human Computer Interaction International Conference, 22-27 July, las Vegas, USA, 2005Conference paper (Refereed)
  • 264.
    Danielsson, Ulrika
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Social Sciences.
    Danielsson, Karin
    Informatik, Umeå Universitet.
    Boundaries between work and leisure within psychosocial life environment: –an interdisciplinary literature review2008Conference paper (Refereed)
    Abstract [en]

     

    Today, being physically away from the workplace does not mean that we necessarily are changing to another environment or leaving our work tasks behind in psychological terms. This paper presents a review of the literature that identifies the effects that cause a blurring of the line between work and leisure. It combines theories from the fields of Informatics, Psychology and Work Science. The results show that people express the need for a balance between work and leisure but are less able to find or create ways of allowing the necessary time for recovery. Presented are some initial suggestions on how to design ICT in order to separate work and leisure activities.

     

  • 265.
    Danielsson, Ulrika
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Social Sciences.
    Danielsson Öberg, Karin
    Umeå Universitet, Samhällsvetenskapliga fakulteteten, Instutionen för informatik.
    Psychosocial Life Environment and Life Roles in Interaction with Daily Use of Information Communication Technology Boundaries between Work and Leisure2010In: Information and Communication Technologies, Society and Human Beings: Theory and Framework / [ed] Darek Haftor (Linnaeus University, Sweden); Anita Mirijamdotter (Linnaeus University, Sweden), Hershey: IGI Global, 2010, p. 266-282Chapter in book (Other academic)
    Abstract [en]

    The presence of ICT (Information Communication Technology) in our psychosocial work environment and in our personal lives, has increased rapidly during the past 40 years. This way of interacting with ICT is often characterized in terms of access to information and social networks with the possibility of being independent of time and place. Every person’s psychosocial health is influenced by their life environment; a combination of their work and home environments, their life roles and of their social networks. People who work professionally in the field of ICT or use ICT in their work experience a blurring between their professional and private roles. However, when people’s experience of work and leisure becomes blurred, this may impact on their psychosocial health. They need to develop strategies to create ways of allowing time for recovery. In this chapter we present a review of the literature that identifies the effects that cause a blurring of the line between work and leisure. Moreover, we present some examples of strategies for managing the blurring of contexts facilitated by ICT. Presented research combines theories from the fields of psychology, informatics and work science.

  • 266.
    Danielsson, Ulrika
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Persson Slumpi, Thomas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Towards a deeper understanding of gender barriers in the IT business2006In: Proceedings of IRIS Information System Research Seminar 29, 2006Conference paper (Other academic)
    Abstract [en]

    In this paper we analyze barriers for women to enter and take on professional roles in the IT business. It is argued that earlier research concerning these barriers only has scratched on the surface and to be able to take appropriate meassures a deeper understanding of the foundation the barriers rests upon is needed. In this paper concepts from gender research, the so called four relation types: power, production, emotion, and symbols; are introduced and used in analyzing the barriers identified in earlier research as well as in case studies of IT professionals and youths at a IT high school. This analyzes shows that gender regimes in our society, when it comes to the IT business are, more or less, hostile to women. It also shows that using these four concepts adds a new dimension to the discussion concerning the under-representation of women in IT business. By focusing on relations, measures can be designed to target specific problematic relations instead of targeting a problem that is a complex of two or more relations.

  • 267.
    Darborg, Alex
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Identifiera känslig data inom ramen för GDPR: Med K-Nearest Neighbors2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    General Data Protection Regulation, GDPR, is a regulation coming into effect on May 25th 2018. Due to this, organizations face large decisions concerning how sensitive data, stored in databases, are to be identified. Meanwhile, there is an expansion of machine learning on the software market. The goal of this project has been to develop a tool which, through machine learning, can identify sensitive data. The development of this tool has been accomplished through the use of agile methods and has included comparisions of various algorithms and the development of a prototype. This by using tools such as Spyder and XAMPP. The results show that different types of sensitive data give variating results in the developed software solution. The kNN algorithm showed strong results in such cases when the sensitive data concerned Swedish Social Security numbers of 10 digits, and phone numbers in the length of ten or eleven digits, either starting with 46-, 070, 072 or 076 and also addresses. Regular expression showed strong results concerning e-mails and IP-addresses.

  • 268.
    Davidsson, Viola
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Att välja e-arkiv2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Digitization has exploded over the past 30 years and unfortunately the archives have not been able to do so. Many municipalities have not yet taken the step out and introduced e-archives, from a survey conducted by the National Archives in 2010, it turned out that only one-fifth of Sweden's municipalities had introduced e-archives, which is very little considering how much progress digitalization has made.

    There are two purposes for this thesis; The first is to do a small survey to capture reasons why some municipalities have introduced e-archives and others not. The other is to show what requirements there are on e-archives regarding legal aspects, security, user-friendliness and what cost the introduction of e-archives entails. The thesis is aimed at municipalities with about 10,000-30,000 inhabitants, where there are no equal opportunities for finance and competence that a larger municipality has.

    The issues are:

    What are the requirements for e-archives regarding legal aspects, security, user-friendliness and can the municipalities bear the cost of e-archives?

    Why did some municipalities get started with e-archives and others not?

    Method for this is a combination of literature study and interview study. Interviews have been done with two suppliers of e-archives, who want to be anonymous in this paper and 4 municipalities, of which two have introduced e-archives and two do not have e-archives. These municipalities have chosen because they are municipalities with about 10 000-30 000 inhabitants (to whom the report is directed). They were also chosen because they are close to each other purely geographical and can thus give a fair picture of the result.

    All the questions were answered in the result section.

    Requirements for legal aspects are the Freedom of the Press Decree. 2, which states that all Swedish citizens have the right to access public documents. The Archives Act regulates what is required for archives, what the purpose is, what it is supposed to do, and that the authorities are to care for their archives.

    In terms of cost, there was the ambition to get an economic picture of what e-archives cost. One municipality submitted price information and the other municipality referred to SKL kommentus which has confidentiality on the price information. The suppliers also did not issue price information and because of this, a comparison could not be made. However, there are some tips on how to think about procurement instead.

    Regarding security, there are examples of what one can think of, such as authorization control in the e-archive to protect the archive from unauthorized persons.

    With regard to accessibility, this essay has chosen to mean how accessible the e-archive is to the public and also the disabled. Therefore, Ales e-archive has been reviewed and the single Post and Telecom Agency's - Guidance for web development has Ale municipality reached 44 %, so they have a bit left.

    In response to the second question, it emerged after the interview study that the biggest reason why the municipalities did not get started with e-archives is that they lack competence and thus a fiery person who drives the issue and resources.

  • 269.
    Davies, Guy
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Agent Metaphores for Analysing Telematic Services1998In: Intelligent Agents for Telecommunication Applications, 1998, p. 156-Chapter in book (Other academic)
    Abstract [en]

    Using a formalisation based on logic and set theory, we present the use of transformations between process related languages and dynamic entity-relationship models. This work formalises and incorporates our earlier research in schema integration and the integration of multi-agent architecture designs to handle problematic cases of global inconsistency in distributed information systems. Telia Research AB (previously Swedish Telecom) commissioned the original work, the implementation of which was used to detect interferences to Telia�s public telematic services. The verification methods in first order logic (FOL) presented here are generally applicable to the analysis of conflicts in process based systems.

  • 270. Davies, Guy
    et al.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Thorbiörnson, Johan
    Stockholms universitet.
    Logic – Basics & Beyond2009 (ed. 2 ed.)Book (Other academic)
  • 271.
    Deckmar, Johan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Implementations, simplifications and evaluations around Nfc on Android2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Near field communication (Nfc), a contact-range and short-lived message exchange technology, has in recent years become popular in relation to payment-cards, key-cards and ski-passes. With the release of, in particular, the Google Nexus S, which is capable of reading and writing Nfc tags as well as exchanging messages between devices by touch, the roles of consumers have changed from carriers of passive cards to that of active readers. This publicly available hardware technology, embedded into relatively cheap connected smartphones, creates a new field of possibilities in which a complete and complex Nfc-based system can be developed solely by means of software. In this thesis work, the research is in relation to the field of Nfc, ranging from the physical characteristics of the technology to the design of the Nfc API on the Android platform. Nfc-based apps, library and systems are designed, developed and evaluated in terms of performance. The Android apps which are implemented are WiFi and Bluetooth connectors as well as an Nfc-sensor value visualizer. Additionally, two full systems are developed which consists of an Android app, backend server, database and web or PC-client frontend. These two systems are: a web-based high-performance live statistical visualizer of Nfc sensor values and an Nfc-scan based product endorsement, Like-event, presenting the picture and name of a user endorsing a product on the in-store advertisement displays on top of the ads. The system for scanning, distributing and presenting statistics on sensor-values from a specially crafted NfcV-enabled sensor is evaluated in terms of performance along the chain of events starting at the Nfc tag introduction and being dispatched on the mobile phone and ending with the calculations and plot-generation carried out by the browser connected to the backend via a WebSocket. The evaluations show that in a use-case in which the user holds a tablet in one hand and an Nfc-enabled smartphone in the other, the user would experience a mean-delay of 515 milliseconds between putting the device against an NfcV-sensor and seeing the statistical plot, containing the last 1000 values, updated in the browser on the tablet. Additionally, the user would experience a mean-delay of 74 milliseconds between the values being presented on the mobile device itself until they are presented on the tablet in the case of constant streaming from an NfcV connected sensor. The conclusion is that this delay of 74 milliseconds is sufficiently low for the user to feel that the devices are tightly coupled, making it natural to pay attention to the tablet when scanning sensors. Possible use-cases for this include a technician walking between built-in passive NfcV sensors on the factory floor or a nurse walking between patients wearing bandages with built-in passive health-sensors. Finally, the work is discussed in terms of ethics and social impact as development in the tele-healthcare field continues, and a set of Nfc-based applications are suggested including Nfc-tags for interactive product customization, company car management and app deployment.

  • 272.
    Deutschmann, Mats
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities.
    Minugh, David
    Hincks, Rebecca
    Hudson, Jean
    Shaw, Philip
    Nygren, Åse
    An Inter-University Platform for Sharing and Collaborating in English Studies: Creating SEED (Sweden's English Educational Database for tertiary education)2009In: Language and Learning: Papers from the ASLA Symposium in Stockholm, 7-8 November, 2008 / [ed] Päivi Juvonen, Uppsala: Swedish Science Press, 2009, 1, p. 127-140Chapter in book (Other academic)
    Abstract [en]

    Abstract: SEED is a two-year nationally-funded Swedish project (2006-2008) intended to establish a bottom-up, self-sustaining inter-university Internet-based network among active teachers and students of English in Swedish universities. This report describes its concepts, organization, failures and successes, and the general lessons that can be learned from the experience of creating and implementing such a network. SEED provides university students and teachers of English with two components: (i) a collaborative space for joint projects and exchange of ideas and (ii) a database repository of learning objects in the field of English studies. The interactive collaborative section is currently hosted by the Stockholm University version of the Sakai VLE (“Mondo”), and via guest logins is available to researchers, teachers and students at all levels. The repository in database form (currently less developed) uses the MIT/HP system called DSpace, which permits full integration with international library practices for documentation and retrieval. Once fully launched, SEED may serve as a model for similar networks in other fields of language studies, or other university areas.

  • 273.
    Deutschmann, Mats
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities.
    Panichi, Luisa
    Pisa University.
    Instructional Design. Teacher Practice and Learning Autonomy2009In: Learning and Teaching in the Virtual World of Second Life / [ed] Judith Molka-Danielsen & Mats Deutschmann, Trondheim, Norway: Tapir Akademisk Forlag, 2009, 1, p. 27-44Chapter in book (Other academic)
    Abstract [en]

    This chapter is based on the experiences from language proficiency courses given on Kamimo education island and addresses concerns related to teacher practice in Second Life. We examine preparatory issues, task design and the teacher’s role in fostering learner autonomy in Second Life. Although the chapter draws mainly on experiences from and reflections in the domain of language education, it has general pedagogical implications for teaching in SL.

  • 274.
    Deutschmann, Mats
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities.
    Panichi, Luisa
    Pisa University, Italy.
    Talking into empty space?: Signalling involvement in a virtual languageclassroom in Second Life2009In: Language Awareness, ISSN 0965-8416, E-ISSN 1747-7565, Vol. 18, no 3-4, p. 310-328Article in journal (Refereed)
    Abstract [en]

    In this study, we compare the first and the last sessions from an online oral proficiencycourse aimed at doctoral students conducted in the virtual world Second Life. The studyattempts to identify how supportive moves made by the teacher encourage learners toengage with language, and what type of linguistic behaviour in the learners leads toengagement in others. We compare overall differences in terms of floor space andturn-taking patterns, and also conduct a more in-depth discourse analysis of parts of thesessions focusing on supportive moves such as back-channelling and elicitors. There areindications that the supportive linguistic behaviour of teachers is important in increasinglearner engagement. In our studywe are also able to observe a change in student linguisticbehaviour between the first and the last sessions with students becoming more activein signalling involvement as the course progresses. Finally, by illustrating some of thelanguage awareness issues that arise in online environments, we hope to contribute tothe understanding of the dynamics of online communication.

  • 275.
    Deutschmann, Mats
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities.
    Ädel, Anneli
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities.
    Garretson, Gregory
    Walker, Terry
    Mid Sweden University, Faculty of Human Sciences, Department of Humanities.
    Introducing Mini-McCALL: A pilot version of the Mid-Sweden Corpus of Computer-Assisted Language Learning.2009In: ICAME journal, ISSN 0801-5775, no 33, p. 21-44Article in journal (Refereed)
    Abstract [en]

    In this paper, we present Mini-McCALL, a 1.3-million-word corpus of computer-mediated communication in the context of online English universitycourses.1 The data consist of three types of written communication – bothbetween students and between students and teachers – in English: discussionforum messages, e-mail messages, and documents handed in as assignments.This pilot corpus comprises the first stage of a proposed 10-million-word corpusof computer-assisted language learning based on the online English coursesoffered by the Department of Humanities at Mid-Sweden University (Mittuniversitetet).In what follows, we first consider e-learning – online, off-campus study,where the medium of instruction and communication involves computer technology– from a theoretical perspective, and the need for such a corpus as oursto facilitate research into this new learning environment, as well as into the languageused in e-learning. We then describe the structure and content of Mini-McCALL and highlight both the research potential of the material and studiescurrently underway, as well as looking forward to the future development of thefull Mid-Sweden Corpus of Computer-Assisted Language Learning (McCALL).Both Mini-McCALL and the ultimate McCALL corpus will be made freelyavailable to the research community.

  • 276.
    Dima, Elijs
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Determining UI design principles for Google Glass and other over-eye interactive device applications2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Google Glass is a new personal computing device that employs an over-eyetransparent display together with voice-control in order to offer audiovisual informationto the device's users. Glass is also a new mediated-reality platform,fundamentally different from common computers and smartphones, and theavailable Glass application (Glassware) design guides do not fully cover human-computer interaction issues that are imposed by Glass' characteristics – issuessuch as optimum information density, use of colourization and positioningto separate information, optimum amount of discrete entities on display, and theuse of iconography. By combining existing guidelines for Glassware UI designwith past research on human-computer interaction and psychology, those issuescan be addressed and can lead to additional design principles. To evaluate theefficacy of such combinations within the technical and design limitations imposedby Google Glass, a set of UI mock-ups for fictional Glassware is createdand used in multiple surveys to acquire data on human response to those combinedfactors. During the study, it was determined that factors including colourization,element positioning and use of icons have a definite effect on user perceptionand preferences, whilst factors related to information density andamount of discrete entities on screen are less relevant. Additionally, supportingevidence was found in relation to the assumption that utility is more importantthan functionless aesthetics. As a result, a UI design guideline set was formulatedthat can be used to supplement existing UI design guidelines for GoogleGlass and similar over-eye transparent-screen devices.

  • 277.
    Dima, Elijs
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Multi-Camera Light Field Capture: Synchronization, Calibration, Depth Uncertainty, and System Design2018Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The digital camera is the technological counterpart to the human eye, enabling the observation and recording of events in the natural world. Since modern life increasingly depends on digital systems, cameras and especially multiple-camera systems are being widely used in applications that affect our society, ranging from multimedia production and surveillance to self-driving robot localization. The rising interest in multi-camera systems is mirrored by the rising activity in Light Field research, where multi-camera systems are used to capture Light Fields - the angular and spatial information about light rays within a 3D space. 

    The purpose of this work is to gain a more comprehensive understanding of how cameras collaborate and produce consistent data as a multi-camera system, and to build a multi-camera Light Field evaluation system. This work addresses three problems related to the process of multi-camera capture: first, whether multi-camera calibration methods can reliably estimate the true camera parameters; second, what are the consequences of synchronization errors in a multi-camera system; and third, how to ensure data consistency in a multi-camera system that records data with synchronization errors. Furthermore, this work addresses the problem of designing a flexible multi-camera system that can serve as a Light Field capture testbed.

    The first problem is solved by conducting a comparative assessment of widely available multi-camera calibration methods. A special dataset is recorded, giving known constraints on camera ground-truth parameters to use as reference for calibration estimates. The second problem is addressed by introducing a depth uncertainty model that links the pinhole camera model and synchronization error to the geometric error in the 3D projections of recorded data. The third problem is solved for the color-and-depth multi-camera scenario, by using a proposed estimation of the depth camera synchronization error and correction of the recorded depth maps via tensor-based interpolation. The problem of designing a Light Field capture testbed is addressed empirically, by constructing and presenting a multi-camera system based on off-the-shelf hardware and a modular software framework.

    The calibration assessment reveals that target-based and certain target-less calibration methods are relatively similar at estimating the true camera parameters. The results imply that for general-purpose multi-camera systems, target-less calibration is an acceptable choice. For high-accuracy scenarios, even commonly used target-based calibration approaches are insufficiently accurate. The proposed depth uncertainty model is used to show that converged multi-camera arrays are less sensitive to synchronization errors. The mean depth uncertainty of a camera system correlates to the rendered result in depth-based reprojection, as long as the camera calibration matrices are accurate. The proposed depthmap synchronization method is used to produce a consistent, synchronized color-and-depth dataset for unsynchronized recordings without altering the depthmap properties. Therefore, the method serves as a compatibility layer between unsynchronized multi-camera systems and applications that require synchronized color-and-depth data. Finally, the presented multi-camera system demonstrates a flexible, de-centralized framework where data processing is possible in the camera, in the cloud, and on the data consumer's side. The multi-camera system is able to act as a Light Field capture testbed and as a component in Light Field communication systems, because of the general-purpose computing and network connectivity support for each sensor, small sensor size, flexible mounts, hardware and software synchronization, and a segmented software framework. 

  • 278.
    Dima, Elijs
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Brunnström, Kjell
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology. Division ICT-Acreo, RISE Research Institutes of Sweden.
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Andersson, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology. Mid Sweden University, Faculty of Science, Technology and Media, Department of Design.
    Edlund, Joakim
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Johanson, Mathias
    Alkit Communications AB, Mölndal.
    Qureshi, Tahir
    HIAB AB, Hudiksvall.
    Joint effects of depth-aiding augmentations and viewing positions on the quality of experience in augmented telepresence2020In: Quality and User Experience, ISSN 2366-0139, E-ISSN 2366-0147, Vol. 5, p. 1-17Article in journal (Refereed)
    Abstract [en]

    Virtual and augmented reality is increasingly prevalent in industrial applications, such as remote control of industrial machinery, due to recent advances in head-mounted display technologies and low-latency communications via 5G. However, the influence of augmentations and camera placement-based viewing positions on operator performance in telepresence systems remains unknown. In this paper, we investigate the joint effects of depth-aiding augmentations and viewing positions on the quality of experience for operators in augmented telepresence systems. A study was conducted with 27 non-expert participants using a real-time augmented telepresence system to perform a remote-controlled navigation and positioning task, with varied depth-aiding augmentations and viewing positions. The resulting quality of experience was analyzed via Likert opinion scales, task performance measurements, and simulator sickness evaluation. Results suggest that reducing the reliance on stereoscopic depth perception via camera placement has a significant benefit to operator performance and quality of experience. Conversely, the depth-aiding augmentations can partly mitigate the negative effects of inferior viewing positions. However the viewing-position based monoscopic and stereoscopic depth cues tend to dominate over cues based on augmentations. There is also a discrepancy between the participants’ subjective opinions on augmentation helpfulness, and its observed effects on positioning task performance.

  • 279.
    Dima, Elijs
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Brunnström, Kjell
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology. RISE Research Institutes of Sweden, Division ICT - Acreo.
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Andersson, Mattias
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Edlund, Joakim
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Johanson, Mathias
    Alkit Communications AB.
    Qureshi, Tahir
    HIAB AB.
    View Position Impact on QoE in an Immersive Telepresence System for Remote Operation2019In: 2019 Eleventh International Conference on Quality of Multimedia Experience (QoMEX), IEEE, 2019, p. 1-3Conference paper (Refereed)
    Abstract [en]

    In this paper, we investigate how different viewing positions affect a user's Quality of Experience (QoE) and performance in an immersive telepresence system. A QoE experiment has been conducted with 27 participants to assess the general subjective experience and the performance of remotely operating a toy excavator. Two view positions have been tested, an overhead and a ground-level view, respectively, which encourage reliance on stereoscopic depth cues to different extents for accurate operation. Results demonstrate a significant difference between ground and overhead views: the ground view increased the perceived difficulty of the task, whereas the overhead view increased the perceived accomplishment as well as the objective performance of the task. The perceived helpfulness of the overhead view was also significant according to the participants.

  • 280.
    Dima, Elijs
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Gao, Yuan
    Institute of Computer Science, Christian-Albrechts University of Kiel, Germany.
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Olsson, Roger
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Koch, Reinhard
    Institute of Computer Science, Christian-Albrechts University of Kiel, Germany.
    Esquivel, Sandro
    Institute of Computer Science, Christian-Albrechts University of Kiel, Germany.
    Estimation and Post-Capture Compensation of Synchronization Error in Unsynchronized Multi-Camera SystemsManuscript (preprint) (Other academic)
  • 281.
    Dima, Elijs
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Olsson, Roger
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information and Communication systems.
    Assessment of Multi-Camera Calibration Algorithms for Two-Dimensional Camera Arrays Relative to Ground Truth Position and Direction2016In: 3DTV-Conference, IEEE Computer Society, 2016, article id 7548887Conference paper (Refereed)
    Abstract [en]

    Camera calibration methods are commonly evaluated on cumulative reprojection error metrics, on disparate one-dimensional da-tasets. To evaluate calibration of cameras in two-dimensional arrays, assessments need to be made on two-dimensional datasets with constraints on camera parameters. In this study, accuracy of several multi-camera calibration methods has been evaluated on camera parameters that are affecting view projection the most. As input data, we used a 15-viewpoint two-dimensional dataset with intrinsic and extrinsic parameter constraints and extrinsic ground truth. The assessment showed that self-calibration methods using structure-from-motion reach equal intrinsic and extrinsic parameter estimation accuracy with standard checkerboard calibration algorithm, and surpass a well-known self-calibration toolbox, BlueCCal. These results show that self-calibration is a viable approach to calibrating two-dimensional camera arrays, but improvements to state-of-art multi-camera feature matching are necessary to make BlueCCal as accurate as other self-calibration methods for two-dimensional camera arrays.

  • 282.
    Dima, Elijs
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Sjöström, Mårten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Olsson, Roger
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Kjellqvist, Martin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Litwic, Lukasz
    Ericsson AB.
    Zhang, Zhi
    Ericsson AB.
    Rasmusson, Lennart
    Observit AB.
    Flodén, Lars
    Observit AB.
    LIFE: A Flexible Testbed For Light Field Evaluation2018Conference paper (Refereed)
    Abstract [en]

    Recording and imaging the 3D world has led to the use of light fields. Capturing, distributing and presenting light field data is challenging, and requires an evaluation platform. We define a framework for real-time processing, and present the design and implementation of a light field evaluation system. In order to serve as a testbed, the system is designed to be flexible, scalable, and able to model various end-to-end light field systems. This flexibility is achieved by encapsulating processes and devices in discrete framework systems. The modular capture system supports multiple camera types, general-purpose data processing, and streaming to network interfaces. The cloud system allows for parallel transcoding and distribution of streams. The presentation system encapsulates rendering and display specifics. The real-time ability was tested in a latency measurement; the capture and presentation systems process and stream frames within a 40 ms limit.

  • 283.
    Ding, Xiaosong
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Bilinear optimization in computational decision analysis2005Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In real-life decision analysis, significant recognition has been given to theunrealistic expectation of numerically precise information. Many modernapproaches attempting to handle imprecision have focused more on representationand less on evaluation. The DELTA method, as one of the fewleading approaches, challenges this issue by its evaluation framework thatcan accommodate both precision and imprecision. However, computationally,DELTA and similar approaches may incur time-consuming calculationsdue to the introduction of imprecise information concerning probability andutility. In general, those problems are bounded non-convex bilinear optimizationprograms with disjoint linear constraints, which cannot be solvedeffectively by any existing general-purpose global optimization technique.This thesis presents two enhanced cutting plane algorithms for solvingbounded disjoint bilinear programs arising in computational decision analysis.Each algorithm consists of a local phase designed to determine a localoptimizer from an approximate solution, and a global phase designed to systematicallyexplore the feasible region, subset by subset. These two phasesare switched automatically during the global search procedure. The basicframework builds upon previously developed efficient cutting plane methods.By embedding the lower bounding technique in a branch and bound procedure,the improvement of their performances seems encouraging in the lightof computational experience. Even though the motivation to develop thesealgorithms stems from computational decision analysis, the idea can also beextended to the development of optimization approaches for handling generalbounded disjoint bilinear programs, especially for larger sized ones.

  • 284.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Al-Khayya, Faiz
    Cutting plane method in decision analysis2004In: Proceedings of the Ninth Meeting of the Nordic Section of the Mathematical Programming Society, October 22–23, 2004, Linköpings universitet, Norrköping, Sweden, 2004Conference paper (Other academic)
    Abstract [en]

    Several computational decision analysis approaches have been developed over a number of years for solving decision problems when vague and numerically imprecise information prevails. However, the evaluation phases in the DELTA method and similar methods often give rise to special bilinear programming problems, which are time-consuming to solve in an interactive environment with general nonlinear programming solvers. This paper proposes a linear programming based global optimization algorithm that combines the cutting plane method together with the lower bound information for solving this type of problems. The central theme is to identify the global optimum as early as possible in order to save additional computational efforts.

  • 285.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Al-Khayyal, F.
    Georgia Institute of Technology, United States.
    Accelerating convergence of cutting plane algorithms for disjoint bilinear programming2007In: Journal of Global Optimization, ISSN 0925-5001, E-ISSN 1573-2916, Vol. 38, no 3, p. 421-436Article in journal (Refereed)
    Abstract [en]

    This paper presents two linear cutting plane algorithms that refine existing methods for solving disjoint bilinear programs. The main idea is to avoid constructing (expensive) disjunctive facial cuts and to accelerate convergence through a tighter bounding scheme. These linear programming based cutting plane methods search the extreme points and cut off each one found until an exhaustive process concludes that the global minimizer is in hand. In this paper, a lower bounding step is proposed that serves to effectively fathom the remaining feasible region as not containing a global solution, thereby accelerating convergence. This is accomplished by minimizing the convex envelope of the bilinear objective over the feasible region remaining after introduction of cuts. Computational experiments demonstrate that augmenting existing methods by this simple linear programming step is surprisingly effective at identifying global solutions early by recognizing that the remaining region cannot contain an optimal solution. Numerical results for test problems from both the literature and an application area are reported.

  • 286.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Al-Khayyal, F
    Improved Cutting Plane Methods for Disjoint Bilinear ProgrammingManuscript (preprint) (Other academic)
  • 287.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Al-Khayyal, F. A.
    Global Optimization in Decision AnalysisManuscript (preprint) (Other academic)
    Abstract [en]

    Computational decision analysis methods, such as the DELTA method, have been developed and implemented over a number of years for solving decision problems where vague and numerically imprecise information prevails. However, the evaluation phases in those methods often give rise to bilinear programming problems, which are time-consuming to solve in an interactive environment with general nonlinear programming solvers. This paper proposes a linear programming based algorithm that combines a cutting plane method with the lower bounding technique for solving this type of problem. The central theme is to identify the global optimum as early as possible in order to avoid generating unnecessary cuts in the convergent cutting plane procedure.

  • 288.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Danielson, Mats
    Inst. för data- och systemvetenskap, Stockholms universitet.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Disjoint Programming in Computational Decision Analysis2010In: Journal of Uncertain Systems, ISSN 1752-8917, Vol. 4, no 1, p. 4-13Article in journal (Refereed)
  • 289.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Danielson, Mats
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Generalized Bilinear Decision AnalysisManuscript (preprint) (Other academic)
  • 290.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Danielsson, Mats
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Non-Linear Programming Solvers for Decision Analysis2004In: Operations Research Proceedings 2003: Selected Papers of the International Conference on Operations Research (OR 2003) Heidelberg, September 3-5, 2003, Springer , 2004, p. 475-Conference paper (Other academic)
    Abstract [en]

    Several methods have been developed over a number of years for solving decision problems when vague and numerically imprecise information prevails. However, the DELTA method and similar methods give rise to particular bilinear programming problems that are time consuming to solve in a real-time environment. This paper presents a set of benchmark tests for non-linear programming solvers for solving this special type of problems. With two existing linear programming based algorithms, it also investigates the performance of linear programming solvers for special decision situations in decision support systems.

  • 291.
    Ding, Xiaosong
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Ekenberg, Love
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Danielsson, Mats
    A Fast Bilinear Optimization Algorithm2004In: Proceedings of the Third International Conference on Nonlinear Analysis and Convex Analysis 2003 (NACA 2003), Yokohama: Yokohama Publishers , 2004Conference paper (Refereed)
    Abstract [en]

    Computational decision analysis methods (such as DELTA) have been developed and implemented over a number of years for solving decision problems when vague and numerically imprecise information prevails. However, the evaluation phases in those methods often give rise to bilinear programming problems, which are time-consuming to solve in an interactive environment with general nonlinear programming solvers such as SNOPT. This paper proposes a linear programming based algorithm for solving this type of problems, thus enabling interactive use of such methods.

  • 292.
    Ding, Xiasong
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Fast local optimization in decision analytic software2004Licentiate thesis, monograph (Other academic)
    Abstract [en]

    In decision analysis, significant recognition has been given to the fact that requiring numerically precise information seems unrealistic for real-life decision situations, Despite the emergence of many modern apporaches, which attempt to handle imprecise estimates, concentration has focused more on representation and less on evaluation. Methods such as the DELTA method  challenged this issue by its evaluation framework that can accommodate both precision an imprecision, and thus pushes forward the disign of advanced dicision analysis systems. However, computationally, DELTA may incur time-consuming calculations due to the introduction of imprecise information into the probability space as well as the value space. Although two fast linear programming based bilinear optimazation algorithms were suggested, which were supporsed to satisfy certain presumed conditions, they are found to be too restrictive.

    This thesis presents a fast potimization approach that can be viewed as a generalized version of the two fast algorithms. The motivation stems from the attempts to discard those presumed conditions. This approach combines ideas from both matrix computations and linear programming, and is, in fact, an iterative method. Since the DELTA method inteds to compute the difference of two expected utilities, this bilinear optimization issue is non-convex, and thus will certainly touch upon the global optimization area. As previously suggested, actually all methods for global optimization consist of two phases: a global phose to thoroughly explore subsets of the feasible region where it is known the blobal optimum will be found, an a local phase to improve the approximation to some local optima, Basically, this fast algorithm is devoted to the local optimization phase.

  • 293.
    Ding, Yuxia
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology.
    Internet of Things: Quantitative Evaluation on Microsoft Azure IoT Suite2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The Internet of Things (IoT) is rapidly gaining ground in our daily life. There is a trend that the number of devices and data increases rapidly in the future. Meanwhile, IoT platforms are emerging to enable people conveniently deal with the IoT and these huge amount of data and devices. Therefore, the goal in this paper is to perform a quantitative evaluation on Microsoft Azure, one of the IoT platform, about its advantages and disadvantages under press to determine if Azure IoT is fit for future IoT. In order to reach this goal, Azure IoT Hub is used as a bridge to connect and manage lots of IoT devices which send and receive huge amount of data. .NET is used to simulate devices and connect them to the IoT Hub. The two-way communication from sensor to cloud and from cloud to actuator is implemented through MQTT protocol. This paper makes measurements on three metrics including response time from sensor sending messages to actuator receiving messages, scalability and cost and analyzes them in detail. Besides, the analysis is also made in a specific scenario which has high demand on sensor update to see how Azure IoT performs. Finally, conclusion is made on Microsoft Azure IoT's advantages and disadvantages under stress.

  • 294.
    Djonova-Popova, I
    Mid Sweden University.
    A New Combined Routing and Congestion Control Algorithm: First International Balcan IFAC Symposium, ETAI, Ohrid, MK, 19931993Conference paper (Other scientific)
  • 295.
    Djonova-Popova, Iskra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    A New Class of SPF Routing Algorithms1994In: Proceedings. International Conference on Information Technologies, Zagreb: SRCE University Computing Centre, University of Zagreb , 1994, p. 179-184Conference paper (Other scientific)
  • 296.
    Djonova-Popova, Iskra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    A Window Flow Control Scheme Based on Input Rate Adjustement1992In: Proceedings. International Conference on Economics/Management and Information Technology, Tokyo, Japan, August 31- September 4, 1992, 1992Conference paper (Refereed)
  • 297.
    Djonova-Popova, Iskra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Analytical Simulation of Routing Algorithms1995In: Proceedings of the Fourth Electrotechnical and Computer Science Conference, ERK 95, IEEE , 1995, p. 31-34Conference paper (Other scientific)
  • 298.
    Djonova-Popova, Iskra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Interior Routing Protocols1997In: A Gateway to Cyberspace: The Second CEENet Workshop on Network Technology, Budapest: NATO ANW-CEENet Publications , 1997Chapter in book (Other scientific)
  • 299.
    Djonova-Popova, Iskra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    Internet in High Schools1996Conference paper (Refereed)
  • 300.
    Djonova-Popova, Iskra
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Technology and Media.
    One Novel Strategy for Link-State Routing Algorithms1997In: Mathematika Balkanika, ISSN 0205-3217, Vol. 11, p. 229-238Article in journal (Refereed)
    Abstract [en]

    One novel strategy for the link-state routing algorithms is proposed. It combines the features of the minimum-hop and the shortest-path strategies and is based on calculation of flow-augmenting path for each destination. This path contains minimum number of links while avoiding those that are congested. The strategy introduces a unique property of being able to trigger the congestion control scheme when necessary. Its performance was investigated upon a flow model of a sample network. The results obtained are encouraging and favor the proposed strategy in termes of lower resource usage, higher reliability, smaller processing time and possibility for tradeoff between delay performance and throughput.

3456789 251 - 300 of 1517
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