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  • 301.
    Lundgren, Mattias
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Analys av applikationsservrar med avseende på Lantmäteriets behov2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    En applikationsserver agerar i regel som en förmedlande server i ett tre-skikt-system med en webbserver på ena sidan och en databasserver på andra sidan. De används för att komma åt funktioner i en databas med hjälp av program skrivna för just den applikationsserver som används. På Lantmäteriets huvudkontor i Gävle använder man sig i dagsläget av 5 stycken olika applikationsservrar, vilket medför stora kostnader i bland annat licenser, support och kompetensutveckling. I detta arbete undersöks skillnader i pris och funktionalitet mellan de aktuella applikationsservrarna samt hur man på bästa sätt kan minska kostnaderna för Lantmäteriet genom att sätta upp ett mål där applikationsservrarna används på ett effektivare sätt. För att ta reda på detta har jag intervjuat personer inom Lantmäteriet angående det nuvarande problemet och tagit reda på hur man kan göra för att möjliggöra en utfasning av en eller flera applikationsservrar. Det framtagna resultatet visar att det är bäst att använda så få applikationsservrar som möjligt, gärna endast en enda ur kostnadssynpunkt. För att göra det möjligt bör man i fortsättningen endast utveckla program för Red Hats applikationsserver JBoss samt försöka migrera befintliga applikationer till den plattformen.

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    FULLTEXT01
  • 302.
    Lundgren, Victor
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Jämförelse av JavaScript-ramverk för stora dynamiska webbapplikationer2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    On today’s market there are many attractive JavaScript-frameworks such as YUI, Dojo Toolkit, Kendo UI and Ext JS. The purpose with this study is to find JavaScript frameworks that are suitable in situation when developing large dynamic web applications. The study shall result in a proposal of one or more JavaScript frameworks to use in the situation previously described. The frameworks have been analyzed and compared with respect to the following aspects and criteria: scalability, AJAX, RPC-handling, cross-browser compatibility, GUI-components, cross-domain calls, DOM-handling, user-friendliness, performance, and licensing. To conduct this study a test application has been developed, that are developed with each framework. This application is feed with information from a database on a web server with PHP as the scripting environment. The application server’s primary objective is to provide information to the test application and not to generate the user interface. The result of this study indicates that Dojo Toolkit meets all requirements and has performed well overall. This framework satisfies the stated criteria and the specified aspects in an eminent way. It’s therefore proposed to be used as the main framework when developing large dynamic web applications. Ext JS is proposed as the secondary suggestion for the same purpose previously described.

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  • 303.
    Lundh, Karl
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Norell, Måns
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences.
    Detektering av mänsklig närvaro i inomhusmiljö2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    One problem in today’s indoor air quality lies within insufficient ventilation. Dynamic ventilation can be obtained by implementing a Demand-Controlled ventilation (DCV) system. DCV systems adjust the ventilation in a building by calculating the impact made by its’ occupants. This is done by sensors, the most common one are carbon dioxide sensors. A different solution would be to calculate the number of occupants and then calculate the carbon dioxide levels from that number. This paper describes the development of a sensor fusion system for presence detection. The system will be using sensors that have been proved being able to detect human presence. Results show that the system detects presence in 97.5 % of the given cases. The system also detects the number of occupants with an error of 1.77 %.

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  • 304.
    Lundsten, Jonas
    et al.
    Malmö universitet.
    Paasch, Jesper M.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Land management, GIS.
    Individual’s Motivation in Standardization of Geographic Information2018In: FIG 2018 Istanbul : Proceedings, The International Federation of Surveyors, FIG , 2018, article id 9364Conference paper (Other academic)
    Abstract [en]

    Geographic information and standardization has gained increased interest in the last decades due to the increased use and exchange of digital data describing geographicand administrative features. Standards and related documents, such as technical reports, play an important part in this for private and public organizations. However, the role and motivation of the individual participants in the standardization process has been less researched. This paper presents the results of a qualitative study on participants’ personal meaningful goals for participating in formal standardization work at the Swedish Standards Institute, SIS. The study focus on production of national standards and related documents, for example national guidelines and other publications. The research question is how project team members are motivated in the standardization project. One or more participants in each of the technical committees, TCs, working with geographicinformation standardization, have been interviewed in regard to how they perceive their individual involvement in the standardization work and the personal meaningful goals making them to do so. A phenomenological method, Meaning Constitution Analysis (MCA), was used for analyzingthe interviewee’s experiences of the projects. The organizational motive behind the project and the personal meaningful goals for the individuals were focused on in the analysis of each interview. The study concluded that the investigated private companies and public organizations fulfil their obligations concerning financing the TCs work, but that some companies and organizationsdo not allow sufficient time for their employees to engage in standardization work, due to prioritization of other day-to-day tasks to be done. That is, standardization was not the organization's main motive. This may lead, apart from poor work environment for the individual participants and concerns about how to prioritize their daily work, which may result in delayed standardization projects. The interviewed participants were mainly motivated by their individual curiosity for the subject. That is, learning was a main personal meaningful goal. However, participants with frequent contacts with stakeholders had a significant motivation for participating, with the long-term goal to satisfy the stakeholders’ needs.

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  • 305.
    Lundsten, Jonas
    et al.
    Malmö Högskola.
    Paasch, Jesper M.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Land management, GIS.
    Motives for Participation in Formal Standardisation Processes for Geographic Information: An Empirical Study in Sweden2017In: International Journal of Standardization Research (IJSR), ISSN 2470-8542, Vol. 15, no 1, p. 16-28Article in journal (Refereed)
    Abstract [en]

    The purpose of this article is to investigate the personal motives for participation in formalstandardization processes for geographic information. The method involved interviewing membersof technical committees at the Swedish Standards Institute, SIS. The results are that the majority ofthe interviewees are very motivated in their work and they think their participation is well-financedby their organizations allocating them to a technical committee. The main motives are to contributeto development of society and be at the forefront of development. However, this article also showsthat several members participating in this study felt that they do not have sufficient time for workingwith tasks related to their technical committees. Their daily work in their respective organizationsoften has higher priority in relation to standardization work. This contrasts with the organizationalgoals of the participating organizations and may slow down the development of standards and otherpublications due to lack of resources.

  • 306.
    Lundsten, Jonas
    et al.
    Malmö universitet.
    Paasch, Jesper M.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    The individuals’ participation in standards setting: role, influence, and motivation2019In: Shaping the Future Through Standardization / [ed] Kai Jacobs, IGI Global, 2019Chapter in book (Refereed)
    Abstract [en]

    Since standardization is essential and additionally have organizational effects, studying motivation for participating in standardization processes is important. A phenomenological study of descriptions made by individual participants in project teams for geographical information at the Swedish Standards Institute, SIS, was conducted 2016-2017. The study indicated that participants were motivated, but there were different motivators depending on the participants’ differing contexts. For most participants the main personal meaningful goal was  to be at the forefront of development. For participants employed by organizations with frequent interactions with stakeholders, the main personal meaningful goal was to satisfy the stakeholders’ needs. This study also showed that several members felt that they do not have sufficient time for working with standardization asks, due to that their daily work in their organizations often has higher priority in relation to standardization work. This may slow down the development of standards and other publications due to lack of resources.

  • 307.
    Luo, Er
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Ma, Kehui
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Experience of Touchscreens: a study of usage of touchscreen among different age groups in Gävle2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper is mainly about people’s experiences of using touchscreens. Information from previous writers’ reports and papers were firstly selected and then used in this thesis. Questions about whether people would like to use touchscreens, why they would or would not like to use touchscreens, the frequency of making mistakes for respondents and the time the respondents think they need to learn to use touchscreens as well as a comparison between old techniques and touchscreens were listed in the questionnaire. After getting information from previous researchers’ reports and questionnaires, we got the results that respondents of younger ages are more likely to try touchscreens as their “input mode” and show more interesting to the entertainment applications. What’s more, younger respondents are more confident in making fewer mistakes. People of older ages are more confident in spending less time in learning how to use touchscreens. Moreover, it is also interesting to get reflection that many respondents complained the difficulties in getting used to the touchscreens and typing correctly on the icons of the touchscreens a lot when participated in this survey.

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    Thesis by Er Luo and Kehui Ma
  • 308.
    Luo, Jixi
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Curvature Maps for Rendering using Enhanced Ambient and Diffuse Illumination2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    For highly diffuse rendering, some materials like snow are commonly accomplished through the use of simplified local illumination models for ambient and diffuse light. In reality, however, for a given point on a surface, the incident light is not only contributed from directional light sources, but also from backscattering from nearby surfaces. To account for this effect, a new technology has been developed, using Curvature Maps for Rendering. This rendering algorithm integrates normal mapping with curvature mapping into a local illumination model to solve the previous mentioned problem. In this report, I will derive different measures to calculate curvature maps from normal maps and I evaluate their suitability for rendering.

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    FULLTEXT01
  • 309.
    Lysén, Erik
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Härdin, Mathias
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Undersökning och utveckling av en Linuxplattform för Sandvik AB2012Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Sandvik IT Services, en del av Sandvik AB, vill testa och undersöka möjligheten attfå fram ett alternativ till Microsoft Windows. Höga licenskostnader kombinerat medoflexibla avtal för operativsystem och applikationer gör att det finns goda skäl attfinna alternativ. Allt fler företag använder Linux kostnadsfria program med öppenkällkod då de idag blivit mer attraktivt med stabila, välutvecklade ochanvändarvänliga distributioner och programvaror. I denna rapport undersöks, testasoch läggs en grund för fortsatt utveckling av ett kostnadsfritt alternativ, en prototypkallad Sandvik Desktop.

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    SandvikDesktop
  • 310.
    Löf, Mikael
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Kontinuerlig leverans till molntjänst2012Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Många företag som utvecklar en webb-applikation försäkrar regelbundet med olika testmetoder att de har en fungerande produkt. Ändå dröjer ofta leverans till kund och slutanvändare. Här beskrivs en lyckad implementation av hur leverans regelbundet kan ske till en molntjänst med ett så kallat blue green pattern som gör att applikationen kan uppdateras med minimal påverkan för slutanvändaren. Lösningen består i att webb-applikationenkan driftsättas i två olika miljöer och att användare alltid, via en html-sida som fungerar som en trafikriktare, skickas till den miljö som har den senaste versionen av applikationen. Genom ett script driftsätts den nya applikationen på den miljö som för tillfället inte har några besökare. När applikationen svarar på anrop ändrar scriptet så att slutanvändare i fortsättningen skickas till den nyligen uppdaterade miljön. Slutanvändare loggas regelbundet ut från applikationen så att de också regelbundet besöker trafikriktaren. Av de två testade molntjänsterna, Heroku och Amazon, är Amazon att föredra på grund av större möjligheter för manuell konfiguration.

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    rapport
  • 311.
    Ma, Ding
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Land management, GIS.
    Topological and Scaling Analysis of Geospatial Big Data2018Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Geographic information science and systems face challenges related to understanding the instinctive heterogeneity of geographic space, since conventional geospatial analysis is mainly founded on Euclidean geometry and Gaussian statistics. This thesis adopts a new paradigm, based on fractal geometry and Paretian statistics for geospatial analysis. The thesis relies on the third definition of fractal geometry: A set or pattern is fractal if the scaling of far more small things than large ones recurs multiple times. Therefore, the terms fractal and scaling are used interchangeably in this thesis. The new definition of fractal is well-described by Paretian statistics, which is mathematically defined as heavy-tailed distributions. The topology of geographic features is the key prerequisite that enables us to see the fractal or scaling structure of the geographic space. In this thesis, topology refers to the relationship among meaningful geographic features (such as natural streets and natural cities).

    The thesis conducts topological and scaling analyses of geographic space and its involved human activities in the context of geospatial big data. The thesis utilizes the massive, volunteered, geographic information coming from LBSM platforms, which are the global OpenStreetMap database and countrywide, geo-referenced tweets and check-in locations. The thesis develops geospatial big-data processing and modeling techniques, and employs complexity science methods, including heavy-tailed distribution detection and head/tail breaks, along with some complex network analysis. Head/tail breaks and the induced ht-index are a powerful tool for geospatial big-data analytics and visualization. The derived scaling hierarchies, power-law metrics, and network measures provide quantitative insights into the heterogeneity of geographic space and help us understand how it shapes human activities at city, country, and world scales. 

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  • 312.
    Ma, Ding
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Land management, GIS.
    Sandberg, Mats
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Energy system.
    Jiang, Bin
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Land management, GIS.
    Characterizing the Heterogeneity of the OpenStreetMap Data and Community2015In: ISPRS International Journal of Geo-Information, ISSN 2220-9964, Vol. 4, no 2, p. 535-550Article in journal (Refereed)
    Abstract [en]

    OpenStreetMap (OSM) constitutes an unprecedented, free, geographical information source contributed by millions of individuals, resulting in a database of great volume and heterogeneity. In this study, we characterize the heterogeneity of the entire OSM database and historical archive in the context of big data. We consider all users, geographic elements and user contributions from an eight-year data archive, at a size of 692 GB. We rely on some nonlinear methods such as power law statistics and head/tail breaks to uncover and illustrate the underlying scaling properties. All three aspects (users, elements, and contributions) demonstrate striking power laws or heavy-tailed distributions. The heavy-tailed distributions imply that there are far more small elements than large ones, far more inactive users than active ones, and far more lightly edited elements than heavy-edited ones. Furthermore, about 500 users in the core group of the OSM are highly networked in terms of collaboration.

  • 313.
    Ma, Han
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Qiuying, Guo
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Design of functions in Smart TV: A survey study of user acceptance on Smart TV functions2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper is defined as a qualitative study and mainly uses a survey, interview and previous reports and papers as methodology. We research which functions in the Smart TV that are widely used and what functions of the Smart TV do people need, and if people accept the design of the functions in the Smart TV.Through the investigation we got three conclusions: firstly, we have discovered the top four popular functions of Smart TV based on the questionnaire, secondly, the precautions the developers should pay attention to when they design the product, lastly we have said that people do not accept these intelligent functions in the Smart TV, and after the study we give the future direction andsuggestion for how to make well designed functions for the Smart TV.

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    Design of functions in Smart TV
  • 314.
    Magnusson, Johan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    IT som administrations- och informationsverktyg inom förskolan2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Undersökningens syfte har varit att studera förskolepedagoger/lärares attityd till att förmedla information och utföra administrativa uppgifter digitalt med hjälp av moderna verktyg samt undersöka hur de kommunicerar med föräldrar idag. Studien är av kvantitativ art och har genomförts med hjälp av enkätundersökning. Enkätundersökningen gick ut till olika kommuner i Sverige för att få ett resultat som kan representera hela landet. För att påvisa hur lyckade informationskanaler kan se ut så genomfördes även två exempelfall. Resultatet visade att det fanns en mestadels positiv attityd till digital förmedling samtidigt som det diskuterades mycket om vikten av integritet och säkerhet.

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  • 315.
    Magnusson, Marcus
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Sessionskapning i webbaserade inloggningssystem: en utredning av angrepp, försvar och kakor2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Användare av webbaserade inloggningssystem hotas av sessionskapningsangrepp, där angripare kan ta över andras konton, oavsett hur stark autentiseringsmekanismen är. HTTP-protokollets tillståndslösa natur tvingar klienter att skicka ett sessions-ID, oftast genom kakor, för att låta servern autentisera varje meddelande efter inloggningen; en angripare behöver endast få tag på detta ID för att fullfölja angreppet. Detta arbete har, utifrån en omfattande litteraturstudie och med ASP.NET Forms Authentication som exempel, visat hur diverse svagheter kan låta angripare få tag på sessions-ID:t på olika sätt – även om HTTPS används för att kryptera kommunikationen. Arbetet har dessutom sammanställt en uppsättning riktlinjer som webbutvecklare kan använda för att försvara sina webbsajter mot dessa angrepp, bland annat genom att sätta HttpOnly-flaggan för sina kakor för att försvåra avläsning på klientdatorn, samt att eventuellt förknippa inloggningssessionen med användarens IP-adress. Någon enkel heltäckande lösning tycks däremot inte finnas, och en avvägning mellan säkerhet och tillgänglighet är ofta nödvändig.

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  • 316.
    Magnusson, Per
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Animationsprocessen i open-source miljö2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Animerade filmer görs idag till störst del av stora företag som har en rejäl budget och arbetskraft. Är det möjligt att göra en hel animerad kortfilm ensam med hjälp av endast program som är gratis?. I det här examensarbetet redogörs om det är möjligt att göra en animerad kortfilm helt själv under begränsad tidsram och begränsade förutsättningar. Jämförelser mellan kommersiell programvara och open-source kommer att göras, där programmen jämförs som helhet och i sina individuella funktioner. Det visas även steg för steg hur animationen skapas. Resulterade blev en kort animerad film som håller en relativt hög standard.

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    FULLTEXT01
  • 317.
    Malmström, Marcus
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Development of Artistic Concepts for Vjing2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this research is describe the development of artistic concepts for visual artists and to evaluate aspects which augments the art experience for audiences. Competition and increased attention for the art form demands greater art to be produced, studying psychological aspects increases the probability of the art being perceived in line with the visions of artists. This research project uses a review of literature for its theoretical research, which is then used to underline decisions within practical experiments in order to give examples of the development of concepts. Findings include a description of the artistic process as well as aspects to augment experiences for audiences. The main conclusion from this work is the importance of combing innovative expressions with theoretical knowledge, in order to create spectacular art which audiences perceives in line with the vision of the artist.

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  • 318.
    Manberger, Johan
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Mogren, Alexander
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Utveckling och utvärdering av ett användargränssnitt för geovisualisering av avvikelsedata2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The Swedish Transport Administration is accountable for the long-term planning and management of the Swedish road infrastructure. An important factor for the safety on our roads is the weather. By predicting the weather it is possible to reduce the risk for accidents. There are stations that measure weather conditions along the roads with the greatest risk of slipperiness and snow drift. Monitoring of these weather station is executed with a  software for quality control of data deviations. The Swedish Transport Administration wants to replace the present interface for quality control with a more user-friendly system. In this thesis, a prototype for a new interface for quality control was created. The interface was developed in accordance with aspects for useful web design and criterias produced in the preliminary study which evaluated the present interface. The new interface displays data deviations as geovisualizations. The interface was developed by using the PostgreSQL, PostGIS, Geoserver, OpenLayers and GeoExt softwares. The usability of the interface was evaluated by the target audience it is designed for. The evaluation consisted of a heuristic evaluation with user tests and questionnaires. The outcome revealed that participants' satisfaction varied. The conclusion was that the usability of the interface is acceptable but that it has potential for improvement.

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  • 319. Marchetti, A
    et al.
    Hast, Anders
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Shepherd, J.
    Tesconi, M.
    Geomemories - a Spatial-Temporal Atlas of the Italian Landscape2011In: Proceedings of International Symposium on Virtual Reality, Archaeology and Cultural Heritage, 2011Conference paper (Refereed)
  • 320.
    Maric, Borislav
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Event Planner: Development of an event planning tool2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    The event planning tool described here is a software developed in the form of a web application enabling continuous access to the information about the events for persons interested in organizing events and those interested in participating at them. For event organizers the tool gives the opportunity to create, edit, present the events and to view the participation statistics for the events they are organizing. The software was developed with PHP and MySQL. The iterative procedure of its development is described in this document.

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    FULLTEXT01
  • 321.
    Mattsson, Daniel
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Björklund, Robert
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Säkerhetsanalys i samband med Androidutveckling: Med inriktning mot säkerhet och skalbarhet2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I det här arbetet utvecklades en androidapplikation åt ett företag. Målet med applikationen var att den skulle vara en kopia av en befintlig iOS-applikation. Parallellt med applikationsutvecklingen utfördes också en analys av informationssäkerheten i systemet kring applikationen. Målet för analysen var att undersöka vilka risker som fanns och ge förslag på hur de kunde åtgärdas. Analysen utfördes med hjälp av en metod framtagen för just detta arbete vilken kom att kallas Säkerhetsanalys. Metoden baserades på Facilitated Risk Analysis and Assessment Process. Med hjälp av Säkerhetsanalysen kunde två typer av information identifieras, användar-information och applikationsinformation samt tre situationer då informationen var utsatt för hot. Situationerna var vid lagring i telefonen, vid lagring på servern och under överföring mellan dessa enheter. Det största hotet var avlyssning vid överföring och att då byta från HTTP till HTTPS skulle näst intill helt eliminera det hotet. Slutsatsen författarna drog var att med relativt enkla medel kunde informationssäkerheten ökas markant. I utvecklingsarbetet användes den agila metoden scrum. Resultatet av applikationsutvecklingen var en applikation som implementerade de grundfunktioner som nämns i kravspecifikationen.

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  • 322.
    Mattsson, Per
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences, Electronics.
    Zachariah, Dave
    Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Stoica, Petre
    Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Recursive nonlinear-system identification using latent variables2018In: Automatica, ISSN 0005-1098, E-ISSN 1873-2836, Vol. 93, p. 343-351Article in journal (Refereed)
    Abstract [en]

    In this paper we develop a method for learning nonlinear system models with multiple outputs and inputs. We begin by modeling the errors of a nominal predictor of the system using a latent variable framework. Then using the maximum likelihood principle we derive a criterion for learning the model. The resulting optimization problem is tackled using a majorization–minimization approach. Finally, we develop a convex majorization technique and show that it enables a recursive identification method. The method learns parsimonious predictive models and is tested on both synthetic and real nonlinear systems.

  • 323. McCartney, Robert
    et al.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Eckerdal, Anna
    Moström, Jan-Erik
    Sanders, Kate
    Thomas, Lynda
    Zander, Carol
    Liminal Spaces and Learning Computing2009In: European Journal of Engineering Education, ISSN 0304-3797, E-ISSN 1469-5898, Vol. 34, no 4, p. 383-391Article in journal (Refereed)
    Abstract [en]

    “Threshold concepts” are concepts that, among other things, transform the way a student looks at a discipline. Although the term “threshold” might suggest that the transformation occurs at a specific point in time, an “aha” moment, it seems more common (at least in computing) that a longer time period is required. This time period is referred to as the “liminal space.”

    In this paper, we summarise our findings concerning how computing students experience the liminal space and discuss how this might affect teaching. Most of our findings so far relate to software engineering. As similar liminal spaces likely occur in other engineering disciplines, these findings have relevance across engineering education.

  • 324.
    McCartney, Robert
    et al.
    Computer Science and Engineering Department, University of Connecticut,, Storrs, CT, United States .
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Eckerdal, Anna
    Information Technology, Department of Scientific Computing, Uppsala University, Uppsala, Sweden .
    Sanders, Kate
    Mathematics and Computer Science, Rhode Island College, Providence, RI, United States .
    Thomas, Lynda
    Department of Computer Science, Aberystwyth University, Aberystwyth, United Kingdom .
    Zander, Carol
    Computing and Software Systems, University of Washington Bothell, Bothell, WA, United States .
    Why computing students learn on their own: motivation for self-directed learning of computing2016In: ACM Transactions on Computing Education, ISSN 1946-6226, E-ISSN 1946-6226, Vol. 16, no 1, p. 2:1-2:18, article id 2Article in journal (Refereed)
    Abstract [en]

    In this article, we address the question of why computing students choose to learn computing topics on their own. A better understanding of why some students choose to learn on their own may help us to motivate other students to develop this important skill. In addition, it may help in curriculum design; if we need to leave some topics out of our expanding curriculum, a good choice might be those topics that students readily learn on their own.

    Based on a thematic analysis of 17 semistructured interviews, we found that computing students’ motivations for self-directed learning fall into four general themes: projects, social and peer interactions, joy of learning, and fear. Under these, we describe several more specific subthemes, illustrated in the words of the students.

    The project-related and social motivations are quite prominent. Although these motivations appear in theliterature, they received greater emphasis from our interviewees. Perhaps most characteristic of computingis the motivation to learn to complete some project, both projects done for fun and projects required for schoolor work.

  • 325.
    McCartney, Robert
    et al.
    Department of Computer Science and Engineering University of Connecticut Storrs, USA.
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Eckerdal, Anna
    Department of Information Technology Uppsala University Uppsala.
    Sanders, Kate
    Mathematics and Computer Science Department Rhode Island College Providence, USA.
    Zander, Carol
    Computing & Software Systems University of Washington Bothell Bothell, USA.
    Can first–year students program yet?: a study revisited2013In: ICER´13: Proceedings of the ninth International Conference on International Computing Education Research / [ed] Beth Simon, Alison Clear, Quintin Cutts, Association for Computing Machinery (ACM), 2013, p. 91-98Conference paper (Refereed)
    Abstract [en]

    Threshold concepts can be used to both organize disciplinaryknowledge and explain why students have diculties at cer-tain points in the curriculum. Threshold concepts transforma student's view of the discipline; before being learned, theycan block a student's progress.In this paper, we propose that in computing, skills, inaddition to concepts, can sometimes be thresholds. Somestudents report nding skills more dicult than concepts.We discuss some computing skills that may be thresholdsand compare threshold skills and threshold concepts.

  • 326.
    McCartney, Robert
    et al.
    Computer Science and Engineering, University of Connecticut, Storrs, CT, United States.
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science. Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Eckerdal, Anna
    Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Sanders, Kate
    Mathematics and Computer Science, Rhode Island College, Providence, RI, United States.
    Zander, Carol
    Computing and Software Systems, University of Washington Bothell, Bothell, WA, United States.
    Folk pedagogy and the geek gene: geekiness quotient2017In: Proceedings of the 2017 ACM SIGCSE Technical Symposium on Computer Science Education, NY, USA: ACM Digital Library, 2017, p. 405-410Conference paper (Refereed)
    Abstract [en]

    In a survey of the CS-education community, we find a range of beliefs about the "geek gene" theory. We suggest an alternative term, the "geekiness quotient (GQ)". The GQ, grounded in Gardner's work on multiple intelligences, is a hypothetical measure of the student's current CS ability. The GQ supports a moderate view of the geek gene: that students arrive in our classrooms with a range of CS abilities, whether acquired through background or innate talent, and can improve their abilities through effort.

  • 327.
    Meinhardt, Emil
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Rudenok, Valentina
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    User Interfaces in Liquid Chromatography-Mass Spectrometry: a Case Study at Stockholm University2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis presents the issue of user interfaces in Liquid chromatography-mass spectrometry (LC-MS), the difficulties in their use, and what we think could be done to alleviate these difficulties. The project came about as a result of complaints from students at a chemistry laboratory in Uppsala. Case studies of the laboratories in Stockholm University and Karolinska Institutet were made in the form of interviews, questionnaires, on-site visits, and literature studies. Combining this work with our knowledge in computer science and visualization, we investigate the ramifications of user interface problems in this area as well as our proposition for solving them. Our study showed that there are unaddressed issues with interface usability and the handling of user feedback, and that there is a need both for further research and bolstered efforts to alleviate these issues.

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  • 328.
    Milutinovic, Goran
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Computational and Visual Tools for Geospatial Multi-Criteria Decision-Making2020Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Geospatial multi-criteria decision-making usually concerns quasi-continuous choice models, with the number of alternatives constrained only by the limits of the used representation model. This sets high demands on the decision-making methods used in the context. The most commonly used approach in geospatial decision-making is combining a method for assigning criteria weights with an aggregation method. As pairwise comparison of alternatives is not feasible when the number of alternatives is large, the weights are usually assigned to criteria without considering the values or the value ranges of the alternatives, an approach often criticized in the decision analysis literature. Apart from criteria weighting controversy, this approach does not allow for advanced use of interactive visualization in the choice phase of the decision-making process. In this thesis, two alternative methods for geospatial decision-making based on the even swaps method are developed. The first method relies on automation of swaps, which makes this method viable for decision problems with any number of alternatives. The second method emanates from the findings of behavioral decision theory, and combines even swaps with reduction of large data sets through quasi-satisficing, allowing for efficient use of interactive visualization in the choice phase of the decision process. Visualization frameworks for both methods are also developed in the thesis. They include both geo-specific representations, such as interactive maps, and infovis techniques such as graphs, diagrams, scatterplots and parallel coordinates. Two studies concerning the impact of interactive visualization on decision-making are presented in the thesis: a study concerning the impact of interactive visualization on geospatial decision-making, and a study concerning potential effects of visual saliency on decision-making. The results of the first study indicated positive effects of interactive visualization on coherency and consistency in performing trade-offs. The results of the second study show that visual saliency may help decision-makers make better decisions. The work presented in this thesis contributes to method development and the use of interactive visualization in the context of geospatial decision-making.

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  • 329.
    Milutinovic, Goran
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Ahonen-Jonnarth, Ulla
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Decision, Risk and Policy Analysis.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science. Department of Information Technology, Uppsala University, Uppsala, Sweden.
    GISwaps: A New Method for Decision Making in Continuous Choice Models Based on Even Swaps2018In: International Journal of Decision Support System Technology, ISSN 1941-6296, E-ISSN 1941-630X, Vol. 10, no 3, p. 57-78Article in journal (Refereed)
    Abstract [en]

    This article describes how continuous GIS-MCDM problems are commonly managed by combining some weighting method based on pairwise comparisons of criteria with an aggregation method. The reliability of this approach may be questioned, though. First, assigning weights to criteria, without taking into consideration the actual consequences or values of the alternatives, is in itself controversial. Second, the value functions obtained by this approach are in most cases linear, which is seldom the case in reality. The authors present a new method for GIS-MCDM in continuous choice models based on Even Swaps. The method is intuitive and easy to use, based on value trade-offs, and thus not relying on criteria weighting. Value functions obtained when using the method may be linear or non-linear, and thereby are more sensitive to the characteristics of the decision space. The performed case study showed promising results regarding the reliability of the method in GIS-MCDM context.

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  • 330.
    Milutinovic, Goran
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Ahonen-Jonnarth, Ulla
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Decision, Risk and Policy Analysis.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science. Division of Visual Information and Interaction, Department of Information Technology, Uppsala University, Uppsala, Sweden.
    Brandt, S. Anders
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences.
    The impact of interactive visualization on trade-off-based geospatial decision-making2019In: International Journal of Geographical Information Science, ISSN 1365-8816, E-ISSN 1365-8824, Vol. 33, no 10, p. 2094-2123Article in journal (Refereed)
    Abstract [en]

    In a previous work we developed GISwaps, a novel method for geospatial decision-making based on Even Swaps. In this paper, we present the results of an evaluation of a visualization framework integrated with this method, implemented within a decision support system. This evaluation is based on two different studies. In the quantitative study, 15 student participants used GISwaps with no visual features, and 15 participants used GISwaps with the integrated visual framework, as the tool in a solar farm site location case study. The results of the quantitative evaluation show positive impact of the visualization in terms of increased coherency in trade-offs. The results also show a statistically significant difference in average trade-off values between the groups, with users from the non-visual group setting on average 20% higher trade-off values compared with the users in the visual group. In the qualitative study, we had one expert in GIS, two experts in decision-making and two experts in solar energy as a focus user group. Data in this study were obtained by observations and semi-structured interviews with the participants. The impact of the visualization framework was assessed positively by all participants in the expert group. 

  • 331.
    Milutinovic, Goran
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Ahonen-Jonnarth, Ulla
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Decision, Risk and Policy Analysis.
    Does visual saliency affect decision-making?Manuscript (preprint) (Other academic)
  • 332.
    Milutinovic, Goran
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Seipel, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Ahonen-Jonnarth, Ulla
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Decision, Risk and Policy Analysis.
    Geospatial decision-making framework based on the concept of quasi-satisficing and even swapsManuscript (preprint) (Other academic)
    Abstract [en]

    Decision-making methods used in geospatial decision-making are often computationally complex prescriptive methods, details of which are rarely transparent to the decision maker. However, having a deep understanding of the details and mechanisms of the applied method is a prerequisite for the efficient use thereof. In this paper, we present a novel decision-making framework that emanates from the need for intuitive and easy-to-use decision support systems for geospatial multi-criteria decision-making. The framework consists of two parts: the decision making model, and the interactive visualization framework. The decision-making model is based on the concept of quasi-satisficing, and as such, it is intuitive and easy to understand and apply. It integrates even swaps, a prescriptive decision-making method, with the findings of behavioural decision-making theories. Providing visual feedback and interaction opportunities throughout the decision-making process, the interactive visualization part of the framework helps the decision maker gain better insight into the decision space and attribute dependencies. Furthermore, it provides the means to analyse and compare the outcomes of different scenarios and decision paths.

  • 333.
    Mirpour, Sasha
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    A Comparison of 3D Camera Tracking Software2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    In the past decade computer generated images have become widely used in the visual effects industry. One of the main reasons is being able to seamlessly blend three dimensional (3D) animation with live-action footage. In this study, different 3D camera tracking software (also referred to as matchmoving) is compared focusing on workflow, user-friendly system, and quality of production.

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  • 334.
    Moen, Daniel
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Konstruktion och utredning av databasstöd för Länsstyrelsens Kalkningsverksamhet2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [sv]

    För databasutveckling finns en mängd regler och standarder framtagna för att databasen ska bli så effektiv och felfri som möjligt. Ibland följs inte dessa fullt ut av olika anledningar. Detta kan leda till problem som i värsta fall kan få konsekvenser för verksamheten som använder sig av den. Ett exempel på en databas där man avvikit från gällande designregler är den som var tänkt att införas för kalkningsverksamheten för Länsstyrelsen i Gävleborg. I det här arbetet har jag gjort en utredning kring denna databas, identifierat dessa avvikelser, utrett varför dessa uppstått och vad dessa har lett till eller eventuellt kan leda till i det här sammanhanget. Jag har också byggt en ny databas enligt gällande regler anpassad för Gävleborgs kalkningsverksamhet. Resultaten jag kommit fram till är att dessa standardavvikelser och felaktigheter troligen beror på en kombination av bristande gränssnitt i form av formulär samt okunskap om databasdesign och administration hos personalen.

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  • 335.
    Mohamad, Rukesh
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Development of Mobile Application for the Dissemination of Operational Information to Customers and Suppliers2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Smartphone are very common to use by more people and for more purposes, and the interest into the mobile applications development has increased. Many companies, that are exposing their service as web services, intended to enable mobile access to distribute their web resources. This work is about developing a mobile phone application for disseminating operational information to customers and suppliers of the company “100 Procent Media AB”.  This application is based on android as operating system. The company put messages on its server that the mobile application later reads and store data in the database of the mobile application. The customers of the company receive a message that is stored in the server of the developing application.

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  • 336.
    Molenaar, Johan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    State of the Arts in Virtual Worlds2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Virtuella världar kan vara så mycket mer än bara spel vilket jag går igenom. Frågan är då vad mer är det och till vad kan de användas? Genom studier och genomgångar av vetenskapliga visar vart det virtuella användandet står idag och till vad virtuella världar kan användas. Jag försöker också ge svar på om det bör vidareutvecklas och användas mer. Det jag går in på är bland annat virtuella obduktioner. Hur de kan användes för att snabba på polisens arbete och hitta dödsorsaker som annars skulle missats och hur personer med vissa religioner som tidigare motsagt sig obduktion kan obduceras snabb och enkelt. Hur datorspelare kan lösa medicinska problem som gäckat forskare i många år på bara några dagar. Hur dessa datorspelare lyckats rekonstruera aidsprotein som kan komma att användas för botemedel eller vaccin. Samt hur många forskare utför beteendeforskning i spel där forskningen kan kopplas till verkliga händelser. Avslutningsvis går jag igenom olika områden där virtuell forskning eller virtuella världar skulle kunna användas till olika ändamål.

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  • 337.
    Moreira, J. M. M.
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management. University of Extremadura, Spain .
    Nex, F.
    3D Optical Metrology Unit, Bruno Kessler Foundation (FBK), Trento, Italy .
    Agugiaro, G.
    3D Optical Metrology Unit, Bruno Kessler Foundation (FBK), Trento, Italy .
    Remondino, F.
    3D Optical Metrology Unit, Bruno Kessler Foundation (FBK), Trento, Italy .
    Lim, Nancy Joy
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Urban and regional planning/GIS-institute.
    From DSM to 3D building models: A quantitative evaluation2013In: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives / [ed] Sorgel U., Heipke C., Jacobsen K., Rottensteiner F., Gottingen: Copernicus gesellschaft MBH , 2013, Vol. 40, no 1W1, p. 213-219Conference paper (Refereed)
    Abstract [en]

    The paper reviews the state-of-the-art in 3D city models and building block generation, with a description of the most common solutions and approaches. Then the digital reconstruction and comparison of LoD1 and LoD2 building models obtained with commercial packages and using different input data are presented. As input data, a DSM at 1m resolution derived from a GeoEye-1 stereo-pair, a DSM from an aerial block at 50 cm GSD and a LiDAR-based DSM at 1m resolution are used. The geometric buildings produced with each dataset are evaluated with respect to some ground-truth measurements but also compared between them. Problems such as the quality of the input DSM, the accuracy of the necessary vector datasets containing the building footprints, the flexibility of the approaches and the potentialities of each dataset will be discussed. As reconstruction of the building models is largely influenced by the quality of the building footprints, which may be out-of-date or slightly shifted with respect to the employed DSMs/DTMs, an in-house method is being developed to derive them starting from the produced DSMs.

  • 338.
    Moreno Torres, Karina
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    On The Market For Successful Uptake of Mobile Social Software2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    For the past recent years mobile developers and content providers have been aware of consumers’ engagement in online social networking. New opportunities are presented when using a mobile device as a medium for social interaction, also referred to as mobile social software. An ever growing effort aimed at various mobile design processes and applications have taken place. To achieve a widespread adoption of mobile social software amongst the main stream mobile consumer, several problem areas have to be taken into consideration, such as the technological possibilities and limitations of mobile phones, security issues regarding user privacy and the different aspects of consumers appeal for social media. This research looks into the overall situation of the current field of research and focuses on the interests in mobile social software amongst users. The study was geographically limited to Malmö, Sweden and focused on a population at the ages of 13-18.

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  • 339. Moström, Jan Erik
    et al.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Eckerdal, Anna
    McCartney, Robert
    Sanders, Kate
    Thomas, Lynda
    Zander, Carol
    Concrete examples of abstraction as manifested in students’ transformative experiences2008In: ICER '08: proceedings of the fourth international workshop on Computing education research, New York: ACM , 2008, p. 125-136Conference paper (Refereed)
    Abstract [en]

    This paper examines transformational learning experiences of computing students as a way to better understand threshold concepts in computing. From empirical evidence we found that students often describe transformative experiences as learning situations in which they were led to use various kinds of abstraction, for example modularity, data abstraction, inheritance, polymorphism, reuse, design patterns, and complexity. Some students describe an abstract concept as coming first, and then needing to be made concrete though application; others describe transformations in which they learn the advantages of these abstract concepts from their experience of not using them.

    Abstraction is certainly of central importance in computer science. It appears, however, from our students’ descriptions of transformative experiences, that abstraction per se is not a threshold, but that particular concepts in which abstraction is paramount exhibit the characteristics of threshold concepts.

  • 340. Moström, Jan-Erik
    et al.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Eckerdal, Anna
    McCartney, Robert
    Sanders, Kate
    Thomas, Lynda
    Zander, Carol
    Computer Science Student Transformations: Changes and Causes2009In: ITiCSE'09: Proceedings of the 14th ACM–SIGCSE Annual Conference on Innovation and Technology in Computer Science Education, New York: ACM , 2009, p. 181-185Conference paper (Refereed)
    Abstract [en]

    We examine the transformations experienced by students during their study of computing. These transformations led to changes in the students’ perception of computing and in their behavior, confidence, and sense of identity as computing professionals. We discuss these transformations, their causes, and implications for the learning and teaching of computer science.

  • 341.
    Mustafa, Mohammad
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Video-Based 3D Textures2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    A new approach for object replacement in 3D space is presented. Introducing a technique that replaces the older two dimensional (2D) based facial replacement method performed by compositing artist in motion picture productions and video commercial industry.

    This method uses 4 digital video cameras filming an actor from 360 degrees, the cameras are placed with 90 degrees in between, the video footage acquired is then used to produce a 3D video texture consisting of video segments taken from different angles representing the object from 3D point of view.

    The video texture is then applied to a 3D modelled head matching the geometry of the original object.

    Offering the freedom of showing the object from any point of view from 3D space, which is not possible using the current two dimensional method where the actormust at all time face the camera.

    The method is described in details with images showing every stage of the process.

    Results are presented as still frames taken from the final video footage and as a video file demonstrating them.

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  • 342.
    Nail, Haidar
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Electronics, Mathematics and Natural Sciences.
    wireless site survey: site surveying in home,office and laboratory environment2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Today, Communication has increasing influence on our Daily life. Wireless data Communication services allow people to access the data Network without a physical Connection. This work Studying Wireless Local Area Network WLAN features and describing all technologies and standard necessary to operate this network. This work aims also at comprehensive investigation of wireless network including wireless Local Area Networks implementation and performance analysis. Testing WLAN performance through some practical measurement such as site surveying in different locations, finally measuring the strength of the signals different locations in the coverage area, test results can be used in order to enhance the network performance.

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  • 343.
    Nilsson, Johan
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Åhlander, Carl
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    En utvärdering av spelmotorn Unity för produktion av interaktiva GIS-applikationer2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Interaktiva applikationer som hanterar visualisering av geografiska informationssystem (GIS) är ett växande ämne. Denna studie har använt spelmotorn Unity som verktyg för att skapa en prototyp av sådan applikation med Högskolan i Gävles campusområde som visualiserad miljö. För att åstadkomma detta har arbete med bl.a. 3D-modellering, texturering, programmering och ljusmappning genomförts. Utifrån studiens resultat ges vissa rekommendationer kring de moment studien behandlar. Dessutom utvärderas Unity som digitalt verktyg för denna typ av produktion. Resultatet visar att i den stora bemärkelsen innehåller Unity det mesta av den funktionalitet som är önskvärd för denna typ av produktion. Programmets möjliga brister handlar primärt om att dess funktionalitet skulle kunna förbättras samt att fler förval för visualisering och förenkling av arbete med grafiska gränssnitt skulle kunna implementeras.

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  • 344.
    Nilsson, Linus
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Plug-in for stereoscopic studio production using 3Ds Max2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In this day and age when 3D cinema is ever increasing in popularity and 3D television sets on the verge of becoming a reality in our homes, the media production companies are interested in looking at how they can start producing stereoscopic format media for this exciting medium. This thesis proposes a solution to parts of the stereoscopic production pipeline by examining and proposing the extent of the requirements of a plug-in to aid in the setting up and rendering of stereo pairs and ultimately proposing such a plug-in and modifying it to suit the proposed requirements. With a high emphasis on ensuring that the plug-in is capable of producing enjoyable stereoscopic content, the plug-in is tested by rendering a demanding scene previously used in factual production work. The findings of these tests ultimately lead to the evaluation of the plug-ins usefulness as a tool for not only the production studio involved but for anyone interested in generating material for this exciting medium.

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  • 345.
    Norberg, Peter
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för byggnadskvalitet.
    Gästgiveri kollar fukt och innemiljö2004In: Husbyggaren, ISSN 0018-7968, no 6, p. 44-45Article in journal (Other (popular science, discussion, etc.))
    Abstract [en]

    Byggnaden Stora Vall på Kungsbäcksområdet i Gävle har utrustats med sensorer, mätutrustning för luftfuktighet och annan modern informationsteknik. Detta för att fungera som en testanläggning. Hittills har dock intresset för att utnyttja anläggningen varit svagt.

  • 346.
    Norberg, Peter
    University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för byggnadskvalitet.
    Sensory surveillance of historic wooden buildings2002In: European timber buildings as an expression of technological and technical cultures: Proceedings of Culture 2000 project: Finnish and Portuguese actions, Paris: Elsevier SAS , 2002, p. 149-157Chapter in book (Other academic)
    Abstract [en]

    Continuous surveillance of critical parts and locations in buildings using various sensor techniques should be an essential part of future building diagnostic and maintenance systems. Up until now, such ambitions have been confined to relatively few buildings world wide, mainly inhibited by the difficulties and costs of the installation, particularly in existing buildings. Recent advances in the field of information technology (IT) have highlighted the possibility of making building monitoring and control systems conceivable to a larger group of users. Novel sensors and measurement techniques enable monitoring of almost any part of a building in terms of moisture content, relative humidity, temperature, ventilation, etc. Local networks, communicating over any physical media, e.g. twisted pair, power lines or even wireless, connect the various measurement nodes together. On-line processing and evaluation of relevant data can provide the user with almost instant information on the status of buildings via the Internet or other modes of telecommunication. The paper reviews and exemplifies the experience of the Centre in the area of building monitoring in general and of historic buildings in particular. Ideas and speculations about future development of web-based maintenance systems for historic buildings will be discussed.

  • 347.
    Nord, Olov
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Mobile Multiplayer Game Interaction With XMPP2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Smartphones are becoming a part of our society, and their usage is becoming more and more widespread. Multiplayer games for these smartphones are increasingly popular and the hardware that is used often puts limits on the developer in terms of battery life and transfer rate. This paper investigates the possibility of using the Publish/Subscribe Extension of the Extensible Messaging and Presence Protocol, or XMPP, as a data transfer protocol in a multiplayer game on Android. To succeed with this, a test application is programmed and used to send position data using PubSub. The report also discusses different ways of adapting the publish/subscribe node tree to the game map. The final conclusion is that it is possible to use XMPP for gaming purposes, but comparisons to other methods will have to be made for each specific case due to the workload of interpreting XML data and the amount of data the XML needs.

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  • 348.
    Norderfeldt, Max
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    How can Maya muscle system be used for facial rigging?2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    There are several different setups for facial rigs today, joint-based and blendshape-based are two popular examples, both of them fall in the category of geomtetry-based facial rigs. The goal with this dissertation is to attempt to develop a Maya muscle facial rig. Then the rig is tested to examine to see where this rig can be an improvement in relation to other rigging systems. It was possible to create a rig using the Maya muscle system. There was an attempt to reach out to the public and get some opinions but it was to weak so no real conclusions could be drawn from it.

    This rig was most useful when creating stylized cartoon characters. The Maya muscle rig has several substantial flaws that is weighted against several cons that reveal that this is a niche rig that is useful in some areas but should be completely avoided in the game industry. 

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  • 349.
    Nordlinder, Johan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Release, deploy och distribution vid plugin-utveckling med Eclipse: Hur detta kan stödjas av en modern utvecklingsmiljö för Java2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Utveckling av olika typer av påbyggnadskod till programvaror blir allt vanligare. Dessa som går under samlingsnamnet plugins skiljer sig från vanliga applikationer då de har en annan struktur samt speciella beroenden till applikationsspecifika moduler. Problem uppstår när denna typ av utveckling inte stöds av de vanliga utvecklingsmiljöer som finns ute på företagen och delar som borde vara automatiserade måste utföras manuellt. Syftet med studien är att undersöka hur utvecklingsmiljön för Java på Sandvik IT Services kan anpassas för att stödja plugin-utveckling för IBM Lotus Notes. I denna studie undersöks skillnaden mellan plugin-utveckling och den vanliga Java-utvecklingen på företaget samt hur detta påverkar verktygen i utvecklingsmiljön. Resultatet beskriver hur utvecklingsmiljön kan anpassas för att stödja plugin-utveckling och en lösning för detta föreslås. Slutligen visas en implementation av lösningen i form av en prototyp där utvecklingsmiljön anpassas för plugins med Maven pluginet Tycho.

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  • 350.
    Nordstrand, Victor
    et al.
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Eklöf, Johan
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Utveckling av design till mötesplats på Internet2007Student paper second term, 10 points / 15 hpStudent thesis
    Abstract [sv]

    Ett community är en mötesplats på Internet där människor kan hålla kontakt, lära känna nya människor, diskutera osv. Det finns idag en mängd olika communities med många olika inriktningar. Communityn är idag mycket populära sidor på nätet och vissa har enormt mycket besökare och tjänar stora pengar. Det kan därför vara svårt att locka medlemmar om inte communityt innehåller nyheter som inte redan finns. Målet med det här arbetet har varit att skapa en tilltalande och användarvänlig design till ett community med ett sommar, fest och rese- tema. Delvis används en enkätundersökning för att ta reda på hur viktig det är med en design som sticker ut för att locka medlemmar. Resultatet av arbetet har blivit att en design med ett tema till sommar, fest och resor har skapats. Designen går i huvudsak i färgerna gul, blå och vit. Designen är till största del uppbyggd av CSS, ASP.NET och HTML.

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