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  • 7151.
    Xu, Chenfan
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    Impact of a Decision Support System on Obstetricians in the Pregnancy Nutrition Guidance2012Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Background: Pregnancy Nutrition (PN) guidance is an issue of great concern worldwide because of its direct relevance to the maternal healthcare and the healthy prenatal development (Li et al., 2004, p. 11). Providing an effective guidance on PN is an onerous and time-consuming task. Extensive experience, knowledge, and continuous and actual calculations are required for the obstetricians. Consequently, the PN guidance is often faced with difficulties and hurdles. It is, however, dramatically changed with the emergence of a Decision Support System (DSS) for PN guidance based on the computer information management technique. This DSS has been applied for the clinic guidance of PN in obstetrics departments or hospitals in China. Its impacts on obstetricians are investigated in this thesis.

    Objectives: This thesis investigates the consequences and intrinsic correlations of relevant factors during the application of the DSS, so that its effects on obstetricians can be clearly identified and the usefulness of this system for pregnancy nutrition guidance can be effectively established. It also lays a foundation for an effective communication between system developers and the end users of this system. At the meantime, this work proposes the concepts and methods that allow proper utility of such an information management system.

    Methods: A number of research methods have been applied for data acquisitions and analyses, including direct observations of the obstetrics department in the hospital in study, conversational interviews with the participating obstetricians, and distance communications. These approaches enable us to prepare the resources to construct the model based on these case studies. As a parallel approach, quantitative methods based on questionnaires have been conducted which reach out a large number of obstetricians in different locations. This allows a statistical analysis that permits the impact analysis and correlation of the intrinsic factors, so that the conclusions of this study can be consolidated.

    Results: Positive impacts will be measured by five factors including convenience, acceptability, generality, concreteness, and effectiveness, while negative impacts by three factors including verbosity, rigidity, and expensiveness.

    Conclusions: The DSS has successfully enhanced the application of correct PN guidance. Both positive and negative impacts have been generated on obstetricians by the DSS. These impacts are mainly related to the seniority of obstetricians and their familiarity with the PN guidance and the DSS. The development, utilization, and operation management of the DSS in PN guidance has generated impacts and functions. This study might provide resources and foundation of the systematic management of the DSS together with its development. The DSS and the related Chief Information Officers and Specialists will benefit from this study and therefore provide improved support and assistance for the end users to complete information system management successfully.

  • 7152. Xu, Luzhou
    et al.
    Stoica, Peter
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Reglerteknik.
    Li, Jian
    A block-diagonal growth curve model2006Ingår i: Digital signal processing (Print), ISSN 1051-2004, E-ISSN 1095-4333, Vol. 16, nr 6, 902-912 s.Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    We consider a variation of the growth curve (GC) model, referred to as the block-diagonal growth curve (BDGC) model, where the unknown regression coefficient matrix is constrained to be block-diagonal. A closed-form approximate maximum likelihood (AML) estimator for this model is derived based on the maximum likelihood principle. We analyze the statistical properties of this method theoretically and show that the AML estimate is unbiased and asymptotically statistically efficient for a large snapshot number. Via numerical examples in wireless communications, we also show that the proposed AML estimator can achieve excellent estimation accuracy.

  • 7153.
    XUE, RUI
    Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation.
    Human Computer Interaction Study: Designing a Mobile Web-based Vaccination Service System Interface for Uganda in Low Resource Settings2013Självständigt arbete på avancerad nivå (masterexamen)Studentuppsats (Examensarbete)
    Abstract [sv]

    The goal of this master thesis was to design a mobile web-based vaccination service system to improve the quality of vaccination service for the low resource settings of Uganda. Through the literature and field study about the local situation of vaccination services, the design challenges and the user’s characteristics were stated, and helped the author to identify the system functionality and usability. Additionally, the Nielsen’s 10 HCI criteria were used to influence the interface design, in order to design a user-friendly system. Through the study of related designs, the benefits of using mobile web-based system solutions in this study were discussed: brings mobility and flexibility of usage; enhances the remote communication and data transaction among users; low level of data input error occurrence and quality data storage. These strengths motivated the author to use the mobile web-based system solution.

  • 7154. Xylia, Maria
    et al.
    Ibrahim, Osama
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Silveira, Semida
    Fossil-free Public Transport: Prescriptive Policy Analysis for the Swedish Bus Fleets2016Ingår i: 2016 13th International Conference on the European Energy Market (EEM), IEEE Computer Society, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Elicitation and processing of the relevant information is the core of any policy decision-making process. This study presents a prescriptive policy analysis for the “fossil-free fuel deployment for public transport buses at the national level in Sweden”, using a policy-oriented modelling and simulation tool, Sense4us , that supports systems analysis for policy involving:: (i) Structuring of policy problems using the labelled causal mapping method [11], (ii) Ex ante Impact assessment using scenario-based dynamic simulation modelling and (iii) Ex-ante evaluation of the considered policy options based on the simulation results and using a set of standard criteria for evaluation of EU policy interventions. The results are most of all useful for designing a policy pathway for public bus transport that is both environmentally sustainable and economically feasible. Moreover, the process allows involvement of the key stakeholders to reflect various priorities and preferences.

  • 7155. Yan, Su-Rong
    et al.
    Zheng, Xiao-Lin
    Wang, Yan
    Song, William Wei
    Högskolan Dalarna, Akademin Industri och samhälle, Informatik.
    Zhang, Wen-Yu
    A graph-based comprehensive reputation model: exploiting the social context of opinions to enhance trust in social commerce2015Ingår i: Information Sciences, ISSN 0020-0255, E-ISSN 1872-6291, Vol. 318, 51-72 s.Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Social commerce is a promising new paradigm of e-commerce. Given the open and dynamic nature of social media infrastructure, the governance structures of social commerce are usually realized through reputation mechanisms. However, the existing approaches to the prediction of trust in future interactions are based on personal observations and/or publicly shared information in social commerce application. As a result, the indications are unreliable and biased because of limited first-hand information and stake-holder manipulation for personal strategic interests. Methods that extract trust values from social links among users can improve the performance of reputation mechanisms. Nonetheless, these links may not always be available and are typically sparse in social commerce, especially for new users. Thus, this study proposes a new graph-based comprehensive reputation model to build trust by fully exploiting the social context of opinions based on the activities and relationship networks of opinion contributors. The proposed model incorporates the behavioral activities and social relationship reputations of users to combat the scarcity of first-hand information and identifies a set of critical trust factors to mitigate the subjectivity of opinions and the dynamics of behaviors. Furthermore, we enhance the model by developing a novel deception filtering approach to discard "bad-mouthing" opinions and by exploiting a personalized direct distrust (risk) metric to identify malicious providers. Experimental results show that the proposed reputation model can outperform other trust and reputation models in most cases. (C) 2014 Elsevier Inc. All rights reserved.

  • 7156.
    Yang, Binbin
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för informatik.
    Zisiadis, Miltiadis
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för informatik.
    Transmedia marketing: strengthening multiplatform user participation through storytelling2014Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    The term transmedia storytelling describes an interactive narrative that exists in multiple platforms. This phenomenon allows active audience participation as a part of the narrative creation process. Part of the prior research on transmedia focuses on how to create a transmedia narrative. However there is a dearth of literature examining the merit that transmedia narratives create in Marketing. In order to answer the research question “How can transmedia storytelling be used to create value in marketing?” we conducted a multiple case study research in which we examined four marketing campaigns to reveal the transmedia elements in them. Using the approach of qualitative content analysis we applied a structured method according which we collected and ­­analysed the data from these campaigns. Our findings suggest that creating audience participation through transmedia storytelling in marketing campaigns for movies, products and services can be beneficial. By using different media, platforms and stimulating user participation, concepts such as brand extension and brand awareness are introduced to the audience with an alternative way. The aim of this thesis is to illustrate several ways of how transmedia can be a valuable asset to a marketing campaign through storytelling.

  • 7157.
    Yang, Dingjie
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för datavetenskap, fysik och matematik, DFM.
    The Network Lens2010Självständigt arbete på avancerad nivå (magisterexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    A complex network graphics may be composed of hundreds and thousands of objects, such as nodes and edges. Each object may hold a large number of attributes that might be difficult to explore in the network visualization. Therefore, many visualization tools and approaches have been developed to gain more information from the network graphics. In this paper, we introduce the concept of the Network Lens, a new widget that assists the users to deal with a complex network. The Network Lens is an interactive tool that combines data visualization to a magic lens. With the help of the Network Lens, users can display hidden information of the elements in the network graphics based on their interest. Moreover, the Network Lens supports a series of interactive functions that give the users flexible options to define their own lenses.

  • 7158. Yang, Guo-liang
    et al.
    Ahlgren, Per
    Avdelningen för bibliotek, språk och ARC, KTH, Skolan för teknikvetenskaplig kommunikation och lärande (ECE), Bibliotek, Publiceringens infrastruktur.
    Yang, Li-ying
    Rousseau, Ronald
    Ding, Jie-lan
    Grading Countries/Territories Using DEA Frontiers2015Ingår i: PROCEEDINGS OF ISSI 2015 ISTANBUL: 15TH INTERNATIONAL SOCIETY OF SCIENTOMETRICS AND INFORMETRICS CONFERENCE, Leuven University Press, 2015, 436-447 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Several approaches exist related to categorizing academic journals/institutions/countries into different levels. Most existing grading methods use either a weighted sum of quantitative indicators (including the case of one properly defined quantitative indicator) or quantified peer review results. An important issue of concern for science and technology management is the efficiency of resource utilization. In this paper we deal with this issue and use multi-level frontiers of data envelopment analysis (DEA) models to grade countries/territories. Research funding and numbers of researchers as used as inputs, while papers and citations are output variables. The research results show that using DEA frontiers we can grade countries/territories on six levels. These levels reflect the corresponding countries' level of efficiency in S&T resource utilization. Furthermore, we use papers and citations as single outputs (with research funding and researchers as inputs) to show changes in country/territory level.

  • 7159.
    Yang, Mengting
    et al.
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Zhang, Fan
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    Development of an Electronic Business Card system - The Meetia system2010Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    First and foremost, we would like to thank to our supervisor Wagner Ourique de Moraisfor his valuable guidance and suggestions during the whole time of the thesis work. Hemotivated us contributed to our project and inspired us greatly.Furthermore, we would like to thank Anders Nilsson and Henrik Abrahamsson who arebusiness students at Halmstad University for the project idea. They gave us an opportunity toparticipate and learn from each other.Finally, we would like to thank you our friends for helping us this project.

  • 7160.
    Yang, Xuan
    et al.
    School of Business Administration, Zhongnan University of Economics and Law, China.
    Gao, Shang
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Understanding the Values of Live Game Streaming: a Value-Focused Thinking Approach2017Ingår i: WHICEB 2017: Proceedings, Association for Information Systems, 2017, 394-401 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Today, along with the development of information communication technology, live streaming is getting more and more popular in China. It has established an integrated industrial chain. There are a large number of users watching different live streams (e.g., games. sports, live shows) through personal computers and mobile devices. In this paper, we aim to investigate the values of live game streaming using the Value-Focused Thinking (VFT) approach. We analyze the values of live game streaming from the perspectives of both streamers and spectators. The identified values are represented in the form of a means-ends objective network. The means-ends objective network derived from this research can serve as a conceptual foundation for future studies and provide useful guidelines for practitioners to better operate live game streaming applications.

  • 7161.
    YARGOVAN, SERTAN
    Högskolan i Jönköping, Internationella Handelshögskolan, IHH, Informatik.
    Transformation of administration into e-government: From municipality to e-municipality in İstanbul Metropolitan Municipality in Turkey2013Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Today, citizens are government-related jobs, more quickly and are being carried out in a systematic way of e-government, began to implement a rebuke to all the countries of the world. According to the level of development of countries, this transition moving forward fast or slow.

    To create the infrastructure of e-government, huge investments need to be made financially. For this reason, e-government applications in each country with the same speed and the same advanced infrastructure take place.

    E-government, E-municipality in itself e-finance and so on divided into subtypes. In this species, e-municipalities have an important place. Municipalities with the basic element of urban life, is extremely important to provide services in the form of e-government. Transparency is fundamental to increasing confidence in the local government and citizen-municipal applications, and the city moving forward on more regular jobs.

    Turkey is a country that has the category of developing countries. The transition to e-government applications is still in the country, are carried out for E-municipal applications. Country, city divided into units called local government services is realized. Municipalities and cities with population over a certain number of other provinces administered in the form of the Municipality. Municipalities depend on the central government.

    Istanbul is the most populous province in Turkey.  For this reason, many municipalities in the country to the other applications that are running in this city are a pioneer. E-municipality application is one of the applications of this type. Istanbul Metropolitan Municipality, e-municipal applications continues to transition. It has continued to work on infrastructure and related units. A portion of the system works. E- Municipalities applications Istanbul's city hall, the municipal authorities, as well as their approach citizens wary of e-municipality system. However, many began to carry out transactions in the virtual environment.

  • 7162.
    Yemane, Berhane
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Karlsson, Mikael
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Utveckling av sökmotor med ranksystem2010Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This paper is a collaboration with the company Sverige-Norge. Their business concept is to connect Swedish manpower to Norwegian employers. The emphasis of this work is to enhance the existing system they use to find Swedish employees to Norwegian employers. The old system was based on manually selecting candidates for possible job-openings. This was done by handpicking the candidates from the database. However this was not efficient but time-consuming and thereby expensive.

    The solution to prevent inefficiency was to create a search-engine. A search-engine would allow employers to find their suitable candidates, without the intervenience of the administration. In order to give an accurate search result, a grading system was requested for each candidate. A grading system would give the employer the benefit to see how well each candidate is suitable for the job-offering. The result was a fully functional search engine with a grading system based on experiences of the candidates.

     

    The paper has the following structure order:

     

    • Introduction
    • Theoretical background
    • Implementation
    • Result
    • Discussion and Conclusion
    • Appendix
    • References

    This is a thesis paper held in Technical University of Jönköping, Sweden. The major of which the paper is written in is Communication and Information Technology.

     

    Key words

    ASP

    ASP.NET

    C#

    Database engineering

    System development

  • 7163. Yi, Choong-ho
    A Framework for Representing and Reasoning with Information Systems1999Konferensbidrag (Refereegranskat)
  • 7164. Yi, Choong-ho
    Informal and formal methods for systems development - focusing on UML2001Ingår i: On Methods for Systems Development in Professional Organisations. The Karlstad University Approach to Information Systems and its Role in Society (Nilsson, AG & Pettersson, JS, Eds.), 307-, Lund: Studentlitteratur , 2001, 307-324 s.Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Systems development, in a strict sense, is a formalisation of the end-user' desires in the form of executable computer programs. In the last two decades a number of formal methods have been suggested to systemise this formalising process and make it more efficient, eventually to achieve an optimal automation of the process. This chapter addresses the following issues: Which are these formal methods, and what are their advantages and disadvantages, compared with traditional, informal methods? Do formal methods work only in theory, but not in practice? A study is presented as an illustration, showing how UML for object-oriented systems development can be formalised using a formal technique called FUML

  • 7165. Yi, Choong-ho
    Informella och formella metoder för systemutveckling- med fokus på UML2000Ingår i: A. G. Nilsson and J. Petterson (Eds.), Karlstadskolans synpå informatikens roll i samhället, pages 301-318, Lund: Studentlitteratur , 2000, 301-318 s.Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [sv]

    Systemutveckling är i strikt mening en formalisering av användarnas önskemål i form av exekverbara datorprogram. För att effektivisera, systematisera och till slut automatisera denna formaliseringsprocess maximalt har en mängd formella metoder föreslagits under de två senaste decennierna. I kapitlet diskuteras följande frågor: Vilka är dessa formella metoder och vilka för- och nackdelar har de jämfört med traditionella, informella metoder? Fungerar formella metoder bara i teorin men inte i praktiken? Som illustration presenteras en studie om hur UML för objekt-orienterad systemutveckling kan formaliseras med hjälp av en formell teknik kallad FUML

  • 7166. Yi, Choong-ho
    Modelling Object-Oriented Dynamic Systems Using a Logic-Based Framework2002Doktorsavhandling, monografi (Övrigt vetenskapligt)
  • 7167. Yi, Choong-ho
    Reasoning about Concurrent Actions in the Trajectory Semantics1995Licentiatavhandling, monografi (Övrigt vetenskapligt)
  • 7168. Yi, Choong-ho
    Reasoning about Concurrent Actions within Features and Fluents1996Konferensbidrag (Refereegranskat)
  • 7169. Yi, Choong-ho
    Representing and Reasoning with Scenarios within Information Systems Modelling2000Konferensbidrag (Refereegranskat)
  • 7170. Yi, Choong-ho
    Towards the Assessment of Logics for Concurrent Actions1996Konferensbidrag (Refereegranskat)
  • 7171. Yi, Choong-ho
    et al.
    , Johannesson
    A Many-Sorted Temporal Logic for Reasoning with Business Goals1999Konferensbidrag (Refereegranskat)
  • 7172. Yi, Choong-ho
    et al.
    Johannesson, C.
    Beyond Goal Representation: Checking Goal-Satisfaction by Temporal Reasoning with Business Processes1999Konferensbidrag (Refereegranskat)
  • 7173. Yilmaz, Natalie
    et al.
    Stirna, Janis
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Factors Influencing Productization of Enterprise Modeling: A Qualitative Inquiry into the Scandinavian Strand of Methods and Tools2015Ingår i: The Practice of Enterprise Modeling, 8th IFIP WG 8.1. Working Conference, PoEM 2015, Valencia, Spain, November 10–12, 2015, Springer , 2015Konferensbidrag (Refereegranskat)
    Abstract [en]

    Enterprise Modeling (EM) methods and tools have been developed and successfully used for more than two decades yet their adoption in organizations is mostly ad hoc. Only a few EM methods and tools have become successful products despite being theoretically sound and having certain success in application in practice. This grounded theory inquiry ponders on what factors influence the successful productization of EM methods and tools. Among the factors discussed are EM maturity gap, method and tool development process, application context, marketing and sales aspects, as well as product aspects.

  • 7174.
    Yngström, Louise
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Abbas, Haider
    Hemani, Ahmed
    Magnusson, Christer
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    A Structured approach for Internalizing Externalities Caused by IT Security Mechanisms2010Ingår i: 2nd Int. Workshop on Education Technology and Computer Science, 2010Konferensbidrag (Refereegranskat)
  • 7175.
    Yngström, Louise
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Kowalski, Stewart
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Barabanov, Rostyslav
    Stockholm University, Social Sciences, DSV.
    Information Security Metrics: Research Directions2011Övrigt (Övrig (populärvetenskap, debatt, mm))
    Abstract [sv]

    Analys av framkomlig forskningsinriktning inom säkerhetsmetriker baserad på state-of-the-art inom området.

  • 7176.
    Yoo, Sam
    et al.
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för informatik (IK).
    Naef, Petter
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för informatik (IK).
    Agila Business Intelligence System: Kritiska framgångsfaktorer2014Självständigt arbete på avancerad nivå (magisterexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Agila Business Intelligence System (ABIS) är en relativt ny och komplex typ av informationssystem, som kännetecknas av förkortade utvecklingstider, genom att exempelvis införa mer självbetjäning i de analytiska systemen, för att kunna möta ett behov av att analysera omvärldsfaktorer, som förändras i en allt snabbare takt. Eftersom ABIS är ett nytt och relativt outforskat område, finns ett behov av att utforska detta område. IT-investeringar är alltför ofta olönsamma och finns ett intresse av att visa på vad som bidrar till ett framgångsrikt införande av ett ABIS och på vilket sätt.

    Syftet med denna fallstudie var att identifiera högt rankade och gemensamma faktorer baserat på de kritiska framgångsfaktorer som belagts av tidigare forskning inom ABIS, beskriva hur dessa bidragit till ett framgångsrikt införande samt utröna skillnader och/eller likheter mellan hur dessa faktorer verkar ur kund- respektive leverantörsperspektiv.

    Som underlag för denna studie användes framför allt tidigare forskning kring kritiska framgångsfaktorer för Business Intelligence System. Speciellt en modell som utvecklades 2010 av Yeoh och Koronios användes som utgångspunkt för att lista de potentiella faktorer, som skulle beaktas av denna studie.

    Denna undersökning genomfördes som en fallstudie med hjälp av ett företag, som både levererar konsulttjänster och ABIS. En Delphipanel användes för att sortera fram framgångsfaktorer, som sedan studerades närmare genom semistrukturerade intervjuer för hur dessa kritiska framgångsfaktorer bidragit till ett framgångsrikt införande av ABIS från dels ett kundperspektiv, dels ett leverantörsperspektiv.

    De två faktorer som rankades högt och samtidigt delades av samtliga respondenter var:

    • affärsvision och planer
    • datakvalitet och dataintegritet

    Kundperspektivet var det styrande och leverantörens roll var ordentligt förstå kundens perspektiv, för att på så sätt framgångsrikt införa ABIS. Affärsvision och planer var av betydelse för att koppla införande till kundens målsättningar. Datakvalitet och dataintegritet var den mest betydelsefull faktorn utifrån den resursfördelningen skedde inom ett införandeprojekt för ABIS.

  • 7177.
    Younas, Muhammad
    Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE).
    A comparative analysis of Cisco Performance Routing (PfR) and other performance enhancing techniques - Cisco QoS and Path Control2011Självständigt arbete på avancerad nivå (magisterexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Eleven years ago Cisco introduced three types of applications on the same converged network and named it AVVID (Architecture for Voice, Video and Integrated Data). In spite of the initial interest and hype surrounding AVVID, the feature was and still is unable to confront problems such as: data priority, load balancing and network congestion. The work in this report addressed these issues within the network. Different Cisco Internetwork Operating System (IOS) methods: routing protocols, Cisco IOS QoS (including LLQ, LFI and Header Compression), Path Control and Cisco Performance Routing (PfR) were all tested to see which feature would work best at enhancing network performance.

    A practical network was created in which these features were carefully implemented one after another. In every step, the results were observed and recorded and if necessary repeated in order to check their validity. The results for RTT (Round Trip Time) and MOS (Mean Opinion Score) showed that in comparison to Path Control and Cisco IOS QoS (Quality of Service) mechanisms, Cisco PfR was able to generate routes on the fly during times of network congestion. This cannot be achieved with the use of Cisco QoS and Path Control which makes Cisco Performance Routing a far more superior feature. Although the focus of the work was VoIP (Voice over Internet Protocol) data, it is possible to construct a network with any application as Cisco PfR is able to reroute data. Cisco PfR is an easily accessible IOS feature which, once implemented, requires very little updating and maintenance.

  • 7178.
    Yousefi Mojir, Kayvan
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    New Forms of Collaboration in Emergency Response Systems: A framework for participatory design of information systems2016Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [sv]

    Ett responssystem (Eng: emergency response system) är vanligtvis ansvarigt för att rädda liv och minska skador på miljö och infrastruktur i små, frekventa olyckor eller storskaliga händelser, kriser och katastrofer. Den pågående globala finanskrisen, brist på professionella resurser och nedskärningar inom den offentliga sektorn samtidigt som förväntningarna från allmänheten ökar är några av de aktuella utmaningar som responssystemet står inför. Samtidigt har globala händelser i form av storskaliga katastrofer som tsunamis, stormar och skogsbränder intensifierats och terrorattacker, och krig i Mellanöstern lett till ökade migrationsströmmar, vilket också ökat trycket inom offentlig sektor. Därför är responsaktörer ofta under extrem press och behöver söka hjälp från och samarbeta med andra resurser i samhället för att bli mer effektiva. Ett sätt att hantera utmaningarna är en framväxande trend i responssystemen i Sverige och internationellt att skapa nya samverkansformer, t.ex. tvärsektoriell samverkan, att involvera medborgare i e-förvaltning, och att involvera frivilliga. Både forskning och praktik har börjat visa på vissa fördelar med att organisera responssystemen på nya sätt. Men trots fördelarna medför också de nya samverkansformerna och de breda, heterogena aktörsgrupper som deltar i dessa olika utmaningar. Juridiska frågor, oklara ansvarsförhållanden, svårigheter att kategorisera arbetsuppgifter, oklarheter i jobbförsäkringar, variation i utbildning och bakgrund hos aktörer och svårigheter att identifiera olika aktörers specifika behov av till exempel informationssystem (IS) är några exempel. Därmed blir analysen av samverkan alltmer komplex och bör inkludera många aspekter. Alltför rudimentära analyser kan leda till otillräckliga resultat i relaterade projekt och IS-utveckling och på sikt kan detta leda till mindre effektivt samarbete mellan aktörerna. Nya former av samverkan måste därför analyseras och förstås noggrant, generellt och i varje visst sammanhang, i syfte att utveckla dem och att stödja aktörerna med effektiva IS.

    I denna licentiatavhandling utvecklas och presenteras ett ramverk för att analysera nya samverkansformer i responssystemet. Den ger också ett inledande förslag på hur man kan tillämpa ramverket med särskilt fokus på ISutveckling. Avhandlingen utgörs av en kvalitativ studie baserad på tre samverkansformer i det svenska responssystemet: sambruk av resurser mellan olika samhällssektorer, att involvera civila frivilliga i räddningsinsatser och samlokalisering av responsaktörer. Ramverket innefattar femton dimensioner: Typ /roll, attityd, utbildning, bakgrund, uppgift och ansvar, tillgänglighet, händelsetyp, kommunikationsmetoder, informationsteknologi, utrustning, organisationsstruktur, ledarskap, kostnad / nytta, arbetsmiljö, policy och juridik. Socio-teknisk systemteori och deltagande design principer tillämpades för att ramverket skulle bli specifikt applicerbart för IS-utveckling. Ramverket kan användas generellt för att analysera nya samverkansformer i responssystemet för att förstå dess olika aspekter och utmaningar, såsom aktörers uppgifter, relevanta lagar, ledarskap och organisatoriska faktorer, som annars riskerar att förbises i analysprocessen. När det gäller ISutveckling kan ramverket bidra till organisationsanalys och behovsanalys i deltagande design av IS för responssystem, t.ex. genom att hjälpa till att identifiera nyckelaktörer och involvera dem i utvecklingsprocesser.

    Ramverket testades först vid en studie av samlokalisering vid Trygghetens Hus och visade på flera potentiella fördelar när det gäller att identifiera och involvera aktörer i utvecklingsprocessen. Ramverket fungerade som ett stöd för att identifiera respondenter och utveckla mallar för intervjuer, observationer och en Future Workshop i de tidiga faserna av deltagande design för att söka täcka alla relevanta aspekter av samverkan. Det verkade också som att ramverket sparade tid och resurser. Därför argumenteras det för att ramverket kan ge liknande fördelar i liknande fall men för att kunna uttala sig mer säkert om detta krävs ytterligare tester och tillämpningar med flera fallstudier. En standardiserad och utvecklad version av ramverket kan ha potential att tillämpas på andra sammanhang inom den offentliga sektorn, såsom e-förvaltning där nya samverkansformer är i fokus. Ett sådant ramverk kan också bidra till att lösa mer generella problem med deltagande design, såsom brist på formalisering, och därmed bidra till att göra ansatsen mer praktisk och tillämpbar i komplexa systemutvecklingskontexter. I nästa steg kommer ramverket användas som en utgångspunkt och ett stöd för att analysera och utveckla IS stöd för sambruk av resurser och tvärsektoriell samverkan mellan aktörer i projektet. ”Effektivt gemensamt bruk av kommunala resurser för ökad säkerhet och trygghet" (ESKORT) i Norrköpings kommun.

  • 7179.
    Yousefi Mojir, Kayvan
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Pilemalm, Sofie
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Informatik. Linköpings universitet, Filosofiska fakulteten.
    Actor-centred emergency response systems: a framework for needs analysis and information systems development2016Ingår i: International Journal of Emergency Management, ISSN 1471-4825, E-ISSN 1741-5071, Vol. 12, nr 4, 403-434 s.Artikel i tidskrift (Refereegranskat)
    Abstract [en]

     A new trend in emergency response systems (ERS) is to create new forms of collaboration, for example, by involving new resources in response operations, in order to compensate for the limited number of professional resources. However, the fact that the new resources may come from different organisational contexts and social sectors creates new challenges which directly affect information systems development for these resources. This study presents a framework including 15 dimensions to analyse the new forms of collaboration. Socio-technical system theory and participatory design approaches are applied to make the framework applicable in the information systems field. The framework might also address general problems such as the lack of formalisation and difficulties in identifying relevant stakeholders in participatory design. A comparison with international research showed a potential to adapt the framework to ERSs in other countries or even to other parts of the public sector that are undergoing similar changes.

  • 7180.
    Yu, Zukun
    et al.
    Zhejiang University.
    Song, William Wei
    Högskolan Dalarna, Akademin Industri och samhälle, Informatik.
    Zheng, Xiaolin
    Zhejiang University.
    Chen, Deren
    Zhejiang University.
    A Recommender System Model Combining Trust with Topic Maps2013Ingår i: World Wide Web: Internet and Web Information Systems: APWeb 2013, 2013Konferensbidrag (Refereegranskat)
    Abstract [en]

    Recommender Systems (RS) aim to suggest users with items that they might like based on users' opinion on items. In practice, information about the users' opinion on items is usually sparse compared to the vast information about users and items. Therefore it is hard to analyze and justify users' favorites, particularly those of cold start users. In this paper, we propose a trust model based on the user trust network, which is composed of the trust relationships among users. We also introduce the widely used conceptual model Topic Map, with which we try to classify items into topics for Recommender analysis. We novelly combine trust relations among users with Topic Maps to resolve the sparsity problem and cold start problem. The evaluation shows our model and method can achieve a good recommendation effect.

  • 7181.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Eduardo Mondlane University, Mozambique.
    Boström, Henrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Comparing Support Vector Regression and Random Forests for Predicting Malaria Incidence in Mozambique2013Ingår i: 2013 International Conference on Advances in ICT for Emerging Regions (ICTer), IEEE Computer Society, 2013, 217-221 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Accurate prediction of malaria incidence is essentialfor the management of several activities in the ministry of health in Mozambique. This study investigates the comparison ofsupport vector machines (SVMs) and random forests (RFs) forthis purpose. A dataset with records of malaria cases covering theperiod 1999-2008 was used to evaluate predictive models on thelast year when developed from one up to nine years of historicaldata. Mean squared error (MSE) was used as performancemetric. The scheme for estimating variable importance commonlyemployed for RFs was also adopted for SVMs. SVMs developedfrom two year of historical data obtained the best predictionaccuracy. Hence, if we are interested in predicting the actualnumber of malaria cases the support vector machines modelshould be chosen. In the analysis of variable importance, IndoorResidual Spray (IRS), the districts of Manhiça and Matola andmonth of January turned out to be the most important predictorsin both the SVM and RF models.

  • 7182.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Boström, Henrik
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Comparing Support Vector Regression and Random Forests for Predicting Malaria Incidence in Mozambique2013Ingår i: 2013 International Conference on Advances in ICT for Emerging Regions (ICTer), IEEE Computer Society, 2013, 217-221 s., 6761181Konferensbidrag (Refereegranskat)
    Abstract [en]

    Accurate prediction of malaria incidence is essential for the management of several activities in the ministry of health in Mozambique. This study investigates the comparison of support vector machines (SVMs) and random forests (RFs) for this purpose. A dataset with records of malaria cases covering the period 1999-2008 was used to evaluate predictive models on the last year when developed from one up to nine years of historical data. Mean squared error (MSE) was used as the performance metric. The scheme for estimating variable importance commonly employed for RFs was also adopted for SVMs. SVMs developed from two years of historical data obtained the best prediction accuracy. Hence, if we are interested in predicting the actual number of malaria cases the support vector machines model should be chosen. In the analysis of variable importance, Indoor Residual Spray (IRS), the districts of Manhiça and Matola and month of January turned out to be the most important predictors in both the SVM and RF models.

  • 7183.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap. Eduardo Mondlane University, Mozambique .
    Boström, Henrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Generalization of Malaria Incidence Prediction Models by Correcting Sample Selection Bias2013Ingår i: Advanced Data Mining and Applications: Proceedings, Part II / [ed] Hiroshi Motoda et al., Springer Berlin/Heidelberg, 2013, 189-200 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Performance measurements obtained from dividing a single sample into training and test sets, e.g. by employing cross-validation, may not give an accurate picture of the performance of any model developed from the sample, on the set of examples to which the model will be applied. Such measurements, which are due to that training and test samples are drawn according to different distributions may hence be misleading. In this study, two support vector machine models for predicting malaria incidence developed from certain regions and time periods in Mozambique are evaluated on data from novel regions and time periods, and the use of selection bias correction is investigated. It is observed that significant reductions in the predicted error can be obtained using the latter approach, strongly suggesting that techniques of this kind should be employed if test data can be expected to be drawn from some other distribution than what is the origin of the training data.

  • 7184.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Boström, Henrik
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Generalization of Malaria Incidence Prediction Models by Correcting Sample Selection Bias2013Ingår i: Advanced Data Mining and Applications: Proceedings, Part II / [ed] Hiroshi Motoda et al., Springer Berlin/Heidelberg, 2013, Vol. 8347, 189-200 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Performance measurements obtained from dividing a single sample into training and test sets, e.g. by employing cross-validation, may not give an accurate picture of the performance of any model developed from the sample, on the set of examples to which the model will be applied. Such measurements, which are due to that training and test samples are drawn according to different distributions may hence be misleading. In this study, two support vector machine models for predicting malaria incidence developed from certain regions and time periods in Mozambique are evaluated on data from novel regions and time periods, and the use of selection bias correction is investigated. It is observed that significant reductions in the predicted error can be obtained using the latter approach, strongly suggesting that techniques of this kind should be employed if test data can be expected to be drawn from some other distribution than what is the origin of the training data.

  • 7185.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Boström, Henrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Predicting the Incidence of Malaria Cases in Mozambique Using Regression Trees and Forests2013Ingår i: International Journal of Computer Science and Electronics Engineering (IJCSEE), ISSN 2320-401X, Vol. 1, nr 1, 50-54 s.Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Malaria remains a significant public health concern in Mozambique with disease cases reported in almost every province. This study investigates the prediction models of the number of malaria cases in districts of Maputo province. Used data include administrative districts, malaria cases, indoor residual spray and climatic variables temperature, rainfall and humidity. Regression trees and random forest models were developed using the statistical tool R, and applied to predict the number of malaria cases during one year, based on observations from preceding years. Models were compared with respect to the mean squared error (MSE) and correlation coefficient. Indoor Residual Spray (IRS), month of January, minimal temperature and rainfall variables were found to be the most important factors when predicting the number of malaria cases, with some districts showing high malaria incidence. Additionally, by reducing the time window for what historical data to take into account, predictive performance can be increased substantially.

  • 7186.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Boström, Henrik
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Predicting the Incidence of Malaria Cases in Mozambique Using Regression Trees and Forests2013Ingår i: International Journal of Computer Science and Electronics Engineering (IJCSEE), ISSN 2320-401X, Vol. 1, nr 1, 50-54 s.Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Malaria remains a significant public health concern in Mozambique with disease cases reported in almost every province. This study investigates the prediction models of the number of malaria cases in districts of Maputo province. Used data include administrative districts, malaria cases, indoor residual spray and climatic variables temperature, rainfall and humidity. Regression trees and random forest models were developed using the statistical tool R, and applied to predict the number of malaria cases during one year, based on observations from preceding years. Models were compared with respect to the mean squared error (MSE) and correlation coefficient. Indoor Residual Spray (IRS), month of January, minimal temperature and rainfall variables were found to be the most important factors when predicting the number of malaria cases, with some districts showing high malaria incidence. Additionally, by reducing the time window for what historical data to take into account, predictive performance can be increased substantially.

  • 7187.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Boström, Henrik
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Strengthening the Health Information System in Mozambique through Malaria Incidence Prediction2013Ingår i: IST-Africa 2013 Conference Proceedings / [ed] Paul Cunningham, Miriam Cunningham, IEEE Computer Society, 2013, 1-7 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Malaria is one of the principal health problems in Mozambique, affecting mostly children. The prediction of accurate future incidence cases is crucial for the implementation of appropriate policies of intervention and disease control in order to strengthen the health system. We propose a model based on support vector machines (SVM) for predicting yearly malaria incidence cases for children 0-4 years of age in the Maputo province, Mozambique. The predictive model is trained on two years of historical malaria data in combination with climatic and malaria control factors. A grid optimization parameter tuning procedure was firstly employed to detect the best parameters and select the kernel. In order to determine the most influential factors, variable importance was calculated through estimating the impact of permuting feature values on the predictive performance. The most important malaria incidence predictors turned out to be temperature variation, followed by Matutuine (district), April (month) and Namaacha (district).

  • 7188.
    Zacarias, Orlando P.
    et al.
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Boström, Henrik
    Stockholms universitet, Institutionen för data- och systemvetenskap.
    Strengthening the Health Information System in Mozambique through Malaria Incidence Prediction2013Ingår i: IST-Africa 2013 Conference Proceedings / [ed] Paul Cunningham, Miriam Cunningham, IEEE Computer Society, 2013, 1-7 s., 6701760Konferensbidrag (Refereegranskat)
    Abstract [en]

    Malaria is one of the principal health problems in Mozambique, affecting mostly children. The prediction of accurate future incidence cases is crucial for the implementation of appropriate policies of intervention and disease control in order to strengthen the health system. We propose a model based on support vector machines (SVM) for predicting yearly malaria incidence cases for children 0-4 years of age in the Maputo province, Mozambique. The predictive model is trained on two years of historical malaria data in combination with climatic and malaria control factors. A grid optimization parameter tuning procedure was firstly employed to detect the best parameters and select the kernel. In order to determine the most influential factors, variable importance was calculated through estimating the impact of permuting feature values on the predictive performance. The most important malaria incidence predictors turned out to be temperature variation, followed by Matutuine (district), April (month) and Namaacha (district).

  • 7189.
    Zafeiropoulou, Styliani
    et al.
    Lunds universitet, Lund, Sweden.
    Carlsson, Sven
    Lunds universitet, Lund, Sweden.
    Andersson, Annika
    Örebro universitet, Handelshögskolan vid Örebro Universitet.
    Towards the Understanding of Success in E-Participatory Budgeting Projects2015Ingår i: Case studies in e-government 2.0: changing citizen relationships / [ed] Imed Boughzala, Marijn Janssen, Saïd Assar, New York: Springer-Verlag New York, 2015, 103-120 s.Kapitel i bok, del av antologi (Refereegranskat)
  • 7190.
    Zaffar, Fahd Omair
    et al.
    Chalmers University of Technology.
    Ghazawneh, Ahmad
    Högskolan i Jönköping, Internationella Handelshögskolan, IHH, Informatik.
    Knowledge Sharing and Collaboration Through Social Media: The Case of IBM2012Ingår i: Proceedings of the 7th Mediterranean Conference on Information Systems, MCIS 2012, Guimarães, Portugal: Association for Information Systems, 2012, Vol. Paper 28Konferensbidrag (Refereegranskat)
    Abstract [en]

    Intellectual capital is the single most important asset owned by any organization. Business continuity, innovation, and long-term sustainability of Small Medium Enterprises depend partly on accumulated organizational knowledge. Knowledge is hard to capture and manage due to its implicit nature. This paper seeks to investigate how Web 2.0 technologies are being used to overcome knowledge sharing and collaboration issues. The new web technologies, which are based on platforms, are referred to as emergent social software platforms (ESSP’s). The use of ESSP’s within a business enterprise to achieve business goals is known as enterprise 2.0 (E2.0). Central to this research is the proposed knowledge sharing cycle model, which has three main stages - internalization, externalization, and objectification. This model is adapted based on the findings of a case study of IBM Corporation. The findings indicate that ESSP’s can be used to support knowledge sharing practices and to help convert knowledge into its different forms.

  • 7191.
    Zambrano, Darine
    et al.
    Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Avdelningen för systemteknik. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Matematisk-datavetenskapliga sektionen, Institutionen för informationsteknologi, Reglerteknik.
    Garcia-Gabin, Winston
    Camacho, Eduardo F.
    Application of a transition graph-based predictive algorithm to a solar air conditioning plant2010Ingår i: IEEE Transactions on Control Systems Technology, ISSN 1063-6536, E-ISSN 1558-0865, Vol. 18, nr 5, 1162-1171 s.Artikel i tidskrift (Refereegranskat)
  • 7192.
    Zandén, Camilla
    Högskolan i Skövde, Institutionen för datavetenskap.
    Just-In-Time: mänskliga och organisatoriska faktorer1997Självständigt arbete på grundnivå (kandidatexamen)Studentuppsats
    Abstract [sv]

    Produktionsstyrningen på företagen runt om i världen är i ständig förändring. Ett begrepp som ofta används för japanska logistiska idéer är Just-In-Time (JIT). Vad som egentligen innefattas i JIT beror på vilken författare man läser. För det mesta belyses de produktionstekniska delarna av JIT.

    En del av Just-In-Time som mer sällan tas upp i litteraturen är faktorer som ibland anses som grundläggande för att JIT ska fungera framgångsrikt på företagen. Många av dessa faktorer är något mjukare aspekter av Just-In-Time. Det är om dessa mjukare faktorer mitt arbete handlar.

    Jag ska i mitt examensarbete undersöka om ett antal faktorer som tillämpas på japanska företag även tillämpas på företag i Sverige. De olika faktorer mitt arbete kretsar kring är i korthet följande:

    - Jobbrotation

    - Gemensamt beslutsfattande

    - Självstyrande grupper

    - Teamwork och grupptillhörighet

    - Möjlighet till långsiktig personalpolitik

    - Omfattande utbildning

    - Gemensamt språk inom företaget

    - Aktiv förslagsverksamhet

    - Synbarhet för alla

    - Lönesystem

    Undersökningen går ut på att få reda på om dessa faktorer är något som tillämpas på företag i Sverige. Jag vill även undersöka i vilken utsträckning de olika faktorerna tillämpas.

    Jag har valt att använda mig av en enkätundersökning för att få reda på om de olika faktorerna tillämpas i Sverige. De företag som var aktuella för att passa in på min problemställning var tillverkande företag i Skaraborg med mellan 100 och 500 anställda. Jag ringde och talade med den produktionsansvarige på företagen och berättade om mitt examensarbete innan jag skickade ut enkäterna.

    Utifrån enkätsvaren kunde jag dra slutsatserna att samtliga faktorer tillämpas på företag i Sverige. Jag kunde även dra slutsatsen att det inte är ovanligt att faktorerna tillämpas. Det fanns ingen faktor som verkade helt främmande för företagen. Jag ansåg mig även kunna säga vilken faktor som tillämpas mest och vilken som tillämpas minst. Den faktor som verkar vara vanligast är ‘Möjlighet till långsiktig personalpolitik’ och den faktor som verkar vara ovanligast är ‘Gemensamt beslutsfattande’.

    Förslag till fortsatt forskning anser jag kunna vara att undersöka ytterligare mjuka faktorer, eventuellt med inriktning på attityder, trender och vilken kunskap som finns på svenska företag om dessa eller andra faktorer.

  • 7193. Zangouei, Farnaz
    et al.
    Babazadeh Gashti, Mohammad Ali
    Höök, Kristina
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    Tijs, Tim
    Stockholms universitet, Samhällsvetenskapliga fakulteten, Institutionen för data- och systemvetenskap.
    de Vries, Gert-Jan
    Westerink, Joyce
    How to Stay in the Emotional Rollercoaster: Lessons Learnt from Designing EmRoll2010Ingår i: NordiCHI, ACM Press , 2010Konferensbidrag (Övrigt vetenskapligt)
    Abstract [en]
    Bodily expressions can be used to involve players in intense experiences with games. By physically moving, breathing, or increasing your pulse, you may start emotional processes that help create for a stronger experience of the narrative in the game. We have designed a system named EmRoll that poses riddles to pairs of players. The riddles can only be solved if the players are, or at least pretend to be, moving according to different emotional states: dancing happily, relaxed breathing and being scared. The system measures movement, breathing and sweat reactions from the two players. Lessons learnt were: playing in pairs is an impor- tant aspect as the two players influenced one-another, pull- ing each other into stronger experiences; getting excited through intense movement when involving your whole body worked well, as did relaxing through deep breathing; using the sweat response as an input mechanism worked less well; and finally, putting a Wizard (a human operator) into the loop can help bootstrap difficulty balancing and thereby increase emotional involvement.
  • 7194.
    Zapata, César
    et al.
    Högskolan i Jönköping, Tekniska Högskolan, JTH, Data- och elektroteknik.
    Jakobsen, Christoffer
    Feasibility Study of a Plug-in Based Architecture for Mobile Blogging2007Självständigt arbete på grundnivå (yrkesexamen), 20 poäng / 30 hpStudentuppsats
    Abstract [sv]

    Det finns inget standardformat för att posta ett blogginlägg, vilket resulterar i att många olika web feed-format och APIer används. Det här examensarbetet angriper problemet genom att undersöka om det är genomförbart att utveckla

    en plug-inbaserad arkitektur för en applikation till mobiltelefoner, som är kompatibel med flera olika bloggtjänster.

    Under studiens gång definierade vi vad termen genomförbart skulle innebära, baserat på krav från olika intressenter. Sex modeller som uppfyllde definitionen utvecklades och jämfördes. En av dessa valdes ut för att användas som grund

    för en prototyp. Prototypfasen avsåg att bevisa om arkitekturen kunde implementeras i en mobil miljö. Studien visade att det är genomförbart att utveckla en plug-inbaserad arkitektur för att lösa problemet, dock med några begränsningar på grund av beroende av bibliotek för strömmande XMLtransformationer som ännu inte implementerats i J2ME.

  • 7195.
    Zaremba, Anja
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Sjöfartshögskolan, SJÖ.
    Petersson, Jem
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Sjöfartshögskolan, SJÖ.
    Alarm på bryggan: trygghet och irritation2011Självständigt arbete på grundnivå (kandidatexamen), 10 poäng / 15 hpStudentuppsats (Examensarbete)
    Abstract [sv]

    Arbetet på fartygsbryggor består till en stor del av kontrolluppgifter. Operatörerna, bryggteamet, har därför kontroll-  och alarmsystem till förfogande. Samspelet mellan människa och system beror delvis på användarens kunskaper och erfarenheter och delvis på bryggdesign och teknikens användarvänlighet. Arbetets ämne är hanteringen av alarm och alarmsystem på fartygsbryggor.  Syftet  var att  undersöka om det finns strategier för detta och i så fall att belysa hur dessa strategier ser ut. Därför undersöktes sju styrmäns erfarenheter med kvalitativa metoder, med halvstrukturerade intervjuer och med innehållsanalys.   

    Undersökningen ledde bl. a. till följande slutsatser:

    Alarmhanteringen sker i stort sätt enligt oskrivna regler och överenskommelser. Det ses som en del av yrket och sker vid sidan om. 

    Styrmännen följer ett handlingsschema när ett alarm påkallar uppmärksamhet.

    Styrmännen konstruerar sina egna verktyg och metoder för att komma tillrätta med ergonomiska problem och med felfunktioner.

  • 7196.
    Zarin, Rouien
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Arkitekthögskolan vid Umeå universitet. Interactive Institute Swedish ICT.
    Fällman, Daniel
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för informatik. Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Arkitekthögskolan vid Umeå universitet. Interactive Institute Swedish ICT.
    Ambient Interactive Architecture: Enriching Urban Spaces with Low-cost, Lightweight Interactive Lighting2010Ingår i: Proceedings of Colour & Light in Architecture, An International Conference, (November 11-12, Venice, Italy), 2010, 296-301 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    We investigate how an existing urban space, a pedestrian tunnel under a busy road, can be enriched using low-cost, lightweight sensors, digital technology, and lighting equipment. Our installation utilizes bars of LED lights placed in a pedestrian tunnel and connected to and individually controlled by a microcontroller. When vehicles pass overhead, a laser sensor detects the movement and passes on this data to the microcontroller that processes the data and changes the lighting within the tunnel in various ways according to our custom-made algorithms. The purpose of the installation has been to convey meaning in an ambient, non-prescriptive way to the pedestrians, bicyclists, and others passing through the tunnel about the traffic situation on the busy roadway overhead. In carrying out this project in a public space not originally designed for installations and events of this kind, we have encountered a large number of practical concerns that need to be dealt with, including issues of access to the power grid, changing weather condition, stakeholders and gatekeepers with different perspectives, and issues of safety and vandalization.

  • 7197.
    Zarin, Rouien
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Designhögskolan vid Umeå universitet. Interactive Institute.
    Lindbergh, Kent
    Interactive Institute Swedish ICT.
    Fällman, Daniel
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för informatik. Interactive Institute Swedish ICT.
    Using Stop Motion Animation to Sketch in Architecture: A Practical Approach2012Ingår i: Design and Technology Education: An International Journal, ISSN 1360-1431, E-ISSN 2040-8633, Vol. 7, nr 3, 78-86 s.Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Widely acknowledged as an archetypal design activity,sketching is typically carried out using little more than penand paper. Today’s designed artifacts however, are oftengiven qualities that are hard to capture with traditionalmeans of sketching. While pen and paper sketchingcatches the character of a building, it may not equally wellcapture how that building changes with the seasons, howpeople pass through it, how the light moves in betweenits rooms from sunrise to dawn, and how its façade subtlydecays over centuries. Yet, it is often exactly these dynamicand interactive aspects that are emphasised incontemporary design work. So is there a way for designersto be able to sketch also these dynamic processes?Over several years and in different design disciplines, wehave been exploring the potential of stop motionanimation (SMA) to serve this purpose. SMA is a basicform of animation typically applied to make physicalobjects appear to be alive. The animator moves objects insmall increments between individually photographedframes. When the photographs are combined and playedback in continuous sequence, the illusion of movement iscreated. Although SMA has a long history in filmmaking,the animation technique has received scarce attention inmost design fields including product design, architecture,and interaction design. This paper brings SMA into thearea of sketching in architecture by reporting on theplanning, conduct, result, and evaluation of a workshopcourse carried out with a group of 50 students at UmeåSchool of Architecture, Umeå University, Sweden.

  • 7198.
    Zarin, Rouien
    et al.
    Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Designhögskolan vid Umeå universitet. Interactive Institute.
    True, Nicholas
    Interactive Institute Swedish ICT.
    Papworth, Nigel
    Interactive Institute Swedish ICT.
    Lindbergh, Kent
    Interactive Institute Swedish ICT.
    Fällman, Daniel
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för informatik. Interactive Institute Swedish ICT.
    Be Green: Implementing an Interactive, Cylindrical Display in the Real World2013Ingår i: In the Proceedings of PerDis '13, Proceedings of the 2nd ACM International Symposium on Pervasive Displays (4-5 June, Mountain View, California), New York, NY: ACM Press, 2013, 55-60 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    Many studies in Human-Computer Interaction and related fields, such as pervasive displays, have historically centered around user evaluation and knowledge production, focusing on usability issues and on creating a more efficient user experience. As the trajectory of HCI moves toward the so-called ‘third wave’, new values are being emphasized and explored. These include concepts such as embodiment and engagement, complementing usability as the primary metric of evaluation. This paper explores the ideation, iteration, design, and real-world deployment of such a ‘third wave’ interactive pervasive installation in the form of an interactive, large cylindrical display. The purpose was to display the air quality data in a manner that would inspire elevated environmental consciousness and discussion among Umeå citizens, especially with regard to the environmental impact of different methods of transportation.

  • 7199.
    Zarin, Ru
    et al.
    Interactive Institute Swedish ICT.
    Fällman, Daniel
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för informatik. Interactive Institute Swedish ICT.
    The Woodbot Pilots: Exploring No-hands Interaction for Interactive Public Installations2011Ingår i: In the Proceedings of the 4th World Conference on Design Research, IASDR 2011 (Oct 31-Nov 4, Delft, Netherlands), 2011Konferensbidrag (Refereegranskat)
    Abstract [en]

    We present and discuss the Woodbot Pilots, an interactive experience in the form of a gesture-based game that runs on a large-scale interactive installation designed to be placed in an airport terminal and used by the general public. The background of the project is described, as well as the installation itself and a scenario of its use. To end the paper, we discuss some of the issues it raises in relation to public installations as well as some of the lessons we have learnt in conceiving, designing, implementing, and studying its use.

  • 7200.
    Zarin, Ru
    et al.
    Interactive Institute Swedish ICT.
    Fällman, Daniel
    Interactive Institute Swedish ICT.
    Through the Troll Forest: Exploring Tabletop Interaction Design for Children with Special Cognitive Needs2011Ingår i: Proceeding ACM CHI '11 Proceedings of the SIGCHI Conference on Human Factors in Computing Systems, New York: ACM Digital Library, 2011, 3319-3322 s.Konferensbidrag (Refereegranskat)
    Abstract [en]

    We describe the interaction design process of conceiving, designing, implementing, and testing Trollskogen, a purpose-built tabletop multitouch system featuring a range of small software applications, termed 'micro applications'. Each micro application is devised as a tool intended to improve or allow for exercise of social communication skills. Throughout the project, we have worked closely with a group of six children diagnosed with Autism Spectrum Disorder (ASD) or Down's syndrome, all in the age range of 5-8. The system has been designed together with the users, their teachers, and various experts as a complement to the current curricula. In this paper, the three main phases of our design process are described and we conclude the paper by reporting on and discussing some preliminary findings and observations from a small user study.

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