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  • 1.
    Aalbers, Anouschka
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Öberg, Linn
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Agil Kravprioritering: En kvalitativ studie om prioriteringsprocesser inom agil mjukvaruutveckling hos Monitor ERP System AB2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Prioritizing requirements is one of the most important and influential steps in the creation of a software product. The process is iterative; it takes place during the entire agile software development. Through prioritizing requirements, it is decided which requirements are to be developed, in which order, and why. 

    The aim of this study is to investigate how companies that design software prioritize requirements and to identify which prioritization methods they might use during this process. The purpose of this study is to gain an understanding for why a well-balanced prioritization is important, which specific prioritization factors give value to a product, as well as identifying how these factors are related to the result. The purpose is also to investigate the difficulties that exist in a prioritization process, and to create an overview of some of the most used prioritization methods in agile software development. 

    This study is conducted in collaboration with the software company Monitor ERP in order to analyze the company's prioritization processes used to develop their business management system Monitor. The method used is a qualitative study that consists of observations of meetings about prioritization processes, and semi-structured interviews. Processing of collected material was done by organizing, analyzing, and compiling results according to concepts and categories that emerged from the literature study. The results documents work processes, common goals, prioritization aspects and challenges in the requirements prioritization at Monitor ERP. 

    A well-balanced prioritization proved to be important to be able to deliver the right functionality on time and to be able to provide dependable estimates of development, which in turn leads to customers gaining confidence in both the product and the company. A number of prioritization factors that give value to the Monitor software were identified, many of which contribute to increasing customer satisfaction and product quality. Monitor ERP does not use any specific prioritization methods, but the development philosophy Minimum Viable Product is used as a basis for their prioritization choices. During the prioritization process, challenges such as limited resources, unpredictable tasks, difficulties with time estimation, and a challenge in balancing customer value and customer focus were experienced.

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    Agil_Kravprioritering_Aalbers_Öberg
  • 2.
    Abd Nikooie Pour, Mina
    et al.
    Linköpings universitet.
    Algergawy, Alsayed
    University Jena, Germany.
    Amardeilh, Florence
    Elzeard.co, Paris, France.
    Amini, Reihaneh
    Data Semantics (DaSe) Laboratory, Kansas State University, United States.
    Fallatah, Omaima
    Information School, University Of Sheffield, Sheffield, United Kingdom.
    Faria, Daniel
    Faculdade De Cîencias, Universidade De Lisboa, Lasige, Portugal.
    Fundulaki, Irini
    Institute Of Computer Science-FORTH, Heraklion, Greece.
    Harrow, Ian
    Pistoia Alliance Inc., United States.
    Hertling, Sven
    University Of Mannheim, Germany.
    Hitzler, Pascal
    Data Semantics (DaSe) Laboratory, Kansas State University, United States.
    Huschka, Martin
    Fraunhofer Institute For High-Speed Dynamics, EMI, Germany.
    Ibanescu, Liliana
    AgroParisTech, Umr MIA-Paris/INRAE, France.
    Jiménez-Ruiz, Ernesto
    University Of London, City, United Kingdom; Department Of Informatics, University Of Oslo, Norway.
    Karam, Naouel
    Fraunhofer Fokus, Berlin, Germany; Institute For Applied Informatics (InfAI), University Of Leipzig, Germany.
    Laadhar, Amir
    Department Of Computer Science, Aalborg University, Denmark.
    Lambrix, Patrick
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. Linköpings universitet.
    Li, Huanyu
    Linköpings universitet.
    Li, Ying
    Linköpings universitet.
    Michel, Franck
    University Ĉote d'Azur, CNRS, Inria, France.
    Nasr, Engy
    University Of Freiburg, Freiburg Galaxy Team, Germany.
    Paulheim, Heiko
    University Of Mannheim, Germany.
    Pesquita, Catia
    Faculdade De Cîencias, Universidade De Lisboa, Lasige, Portugal.
    Portisch, Jan
    University Of Mannheim, Germany.
    Roussey, Catherine
    Inrae Centre Clermont-ARA, Laboratoire Tscf, France.
    Saveta, Tzanina
    Institute Of Computer Science-FORTH, Heraklion, Greece.
    Shvaiko, Pavel
    Trentino Digitale SpA, Trento, Italy.
    Splendiani, Andrea
    Pistoia Alliance Inc., United States.
    Trojahn, Cássia
    Irit and Université Toulouse II, Toulouse, France.
    Vatascinová, Jana
    Prague University Of Economics And Business, Czech Republic.
    Yaman, Beyza
    Adapt Centre, Dublin City University, Ireland.
    Zamazal, Ondrej
    Prague University Of Economics And Business, Czech Republic.
    Zhou, Lu
    Data Semantics (DaSe) Laboratory, Kansas State University, United States.
    Results of the Ontology Alignment Evaluation Initiative 20212021In: Proceedings of the 16th International Workshop on Ontology Matching co-located with the 20th International Semantic Web Conference (ISWC 2021), Virtual conference, October 25, 2021 / [ed] Shvaiko P., Euzenat J., Jimenez-Ruiz E., Jimenez-Ruiz E., Hassanzadeh O., Trojahn C., CEUR-WS.org , 2021, p. 62-108Conference paper (Refereed)
    Abstract [en]

    The Ontology Alignment Evaluation Initiative (OAEI) aims at comparing ontology matching systems on precisely defined test cases. These test cases can be based on ontologies of different levels of complexity and use different evaluation modalities (e.g., blind evaluation, open evaluation, or consensus).The OAEI 2021 campaign offered 13 tracks and was attended by 21 participants.This paper is an overall presentation of that campaign. 

  • 3.
    Abd Nikooie Pour, Mina
    et al.
    Linköping University.
    Li, Huanyu
    Linköping University.
    Armiento, Rickard
    Linköping University.
    Lambrix, Patrick
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. Linköping University.
    A First Step Towards a Tool for Extending Ontologies2021In: Proceedings of the Sixth International Workshop on the Visualization and Interaction for Ontologies and Linked Data: co-located with the 20th International Semantic Web Conference (ISWC 2021) / [ed] Patrick Lambrix, Catia Pesquita, Vitalis Wiens, CEUR Workshop proceedings , 2021, p. 1-12Conference paper (Refereed)
    Abstract [en]

    Ontologies have been proposed as a means towards making data FAIR (Findable, Accessible, Interoperable, Reusable). This has attracted much interest in several communities and ontologies are being developed. However, to obtain good results when using ontologies in semantically-enabled applications, the ontologies need to be of high quality. One of the quality aspects is that the ontologies should be as complete as possible. In this paper we propose a first version of a tool that supports users in extending ontologies using a phrase-based approach.  To demonstrate the usefulness of our proposed tool, we exemplify the use by extending the Materials Design Ontology.

  • 4.
    Abdulkadir, Hassan Bisri
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences.
    Undersökning av användbarheten hos ett tidsrapporteringssystem2022Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In our everyday life, we as users encounter many different interfaces, therefore it is of great importance that they work well and have clear instructions for how to use them, i.e., that they have a good usability. Through the increased digitization, people today can work or study remotely, which is something that has been of great help recently during the covid pandemic. Since remote work and education has become common, it is important that we can also do our usability tests remotely.

    The purpose of this work is to investigate the usability of the time reporting system Tidig and to compare different test tools to see which tool is best suited for future usability tests on Tidig. The tests will be of the type URUT (Unmoderated Remote Usability Testing), which means that usability tests are unmoderated and done remotely for easier data collection. With the given data the result is expected to give a better picture of the usability of time reporting systems for future improvement work as well as which tool should be used in future usability tests.

    The results of the usability tests have shown that the time reporting system Tidig has a high usability. During the usability tests, the participants did not have a major difficulty in solving most of the tasks. The questions that were asked showed that the participants were satisfied with the system but would like small improvements to be made on certain parts of the time reporting system. The comparison of the tools shows that the tool best suited for future usability tests on Tidig is the Loop11 test tool. Loop11 offers a variety of functions to collect quantitative and qualitative data, the test tool also provides statistics on tasks, questions and the questionnaires.

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    fulltext
  • 5.
    Abid, Rabia
    et al.
    University Lahore, Pakistan.
    Iwendi, Celestine
    University of Bolton, UK.
    Javed, Abdul Rehman
    Air University, Islamabad, Pakistan.
    Rizwan, Muhammad
    University Lahore, Pakistan.
    Jalil, Zunera
    Air University, Islamabad, Pakistan.
    Anajemba, Joseph Henry
    Hohai University,Changzhou, China.
    Biamba, Cresantus
    University of Gävle, Faculty of Education and Business Studies, Department of Educational sciences, Educational science.
    An optimised homomorphic CRT-RSA algorithm for secure and efficient communication2023In: Personal and Ubiquitous Computing, ISSN 1617-4909, E-ISSN 1617-4917, Vol. 27, p. 1405-1418Article in journal (Refereed)
    Abstract [en]

    Secure and reliable exchange of information between devices is crucial for any network in the current digital world. This information is maintained on storage devices, routing devices, and communication over the cloud. Cryptographic techniques are used to ensure the secure transmission of data, ensuring the user’s privacy by storing and transmitting data in a particular format. Using encryption, only the intended user possessing the key can access the information. During data or essential transmission, the channel should be secured by using robust encryption techniques. Homomorphic Encryption (HE) techniques have been used in the past for this purpose. However, one of the flaws of the conventional HE is seen either in its slow transmission or fast key decryption. Thus, this paper proposes an optimized Homomorphic Encryption Chinese Remainder Theorem with a Rivest-Shamir-Adleman (HE-CRT-RSA) algorithm to overcome this challenge. The proposed Technique, HE-CRT-RSA, utilizes multiple keys for efficient communication and security. In addition, the performance of the HE-CRT-RSA algorithm was evaluated in comparison with the classical RSA algorithm. The result of the proposed algorithm shows performance improvement with reduced decryption time. It is observed that the proposed HE-CRT-RSA is 3–4% faster than the classical Rivest-Shamir-Adleman (RSA). The result also suggests that HE-CRT-RSA effectively enhances security issues of the cloud and helps to decrease the involvement of intruders or any third party during communication or inside the data/server centers.

  • 6.
    Abrahamsson, Emil
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Digitalt arkiv2008Student paper second term, 10 points / 15 hpStudent thesis
    Abstract [sv]

    Grunden för detta arbete har varit att förenkla hantering och sökning bland ritningar och förteckningar i ett ritningsarkiv. Lösningen har blivit ett webbaserat datasystem som bygger på en databas där all information lagras och är sökbar. Resultatet har blivit ett system som man oavsett var man befinner sig inom företagets nätverk ha tillgång till alla ritningar och förteckningar på ett snabbt och effektivt sätt.

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    FULLTEXT01
  • 7. Adams, Robin
    et al.
    Fincher, Sally
    Pears, Arnold
    Börstler, Jürgen
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Dalenius, Peter
    Eken, Gunilla
    Heyer, Tim
    Jacobsson, Andreas
    Lindberg, Vanja
    Molin, Bengt
    Moström, Jan-Erik
    Wiggberg, Mattias
    What is the word for 'Engineering' in Swedish: Swedish students conceptions of their discipline2007Report (Other academic)
    Abstract [en]

    Engineering education in Sweden – as in the rest of the world – is experiencing a decline in student interest. There are concerns about the ways in which students think about engineering education, why they join an academic programme in engineering, and why they persist in their studies. In this context the aims of the Nationellt ämnesdidaktiskt Centrum för Teknikutbildning i Studenternas Sammanhang project (CeTUSS) is to investigate the student experience and to identify and support a continuing network of interested researchers, as well as in building capacity for disciplinary pedagogic investigation.

    The Stepping Stones project brings together these interests in a multi-researcher, multi-institutional study that investigates how tudents and academic staff perceive engineering in Sweden and in Swedish education. The first results of that project are reported here. As this study is situated uniquely in Swedish education, it allows for exploration of “a Swedish perspective” on conceptions of engineering. The Stepping Stones project was based on a model of research capacity-building previously instantiated in the USA and Australia (Fincher & Tenenberg, 2006).

  • 8.
    Ahlmén, Caroline
    University of Gävle. University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Hemligheten bakom populära animerade karaktärer2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vad gör en framgångsrik animerad karaktär? Homer Simpson, Svampbob Fyrkant och Eric Cartman kommer att analyseras och jämföras för att hitta vad som gör just dem så populära. Därefter kommer de psykologiska aspekterna att granskas. Varför tilltalar dessa karaktärer människor? Riktlinjer för hur man skapar en populär animerad karaktär kommer att utvecklas utifrån resultatet av utredningen.

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    FULLTEXT01
  • 9.
    Ahonen-Jonnarth, Ulla
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Odelstad, Jan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Simulation as a tool for the evaluation of forest management treatments2010In: ESM'2010 - The 2010 European Simulation and Modelling Conference / [ed] Gerrit K. Janssens, Katrien Ramaekers and An Caris, Ghent: EUROSIS-ETI , 2010, p. 426-433Conference paper (Refereed)
    Abstract [en]

    Cleaning of young forest stands is a multicriteria problem with conflicting goals. This kind of forest management treatment is performed by human beings but it is possible that this work may be performed by artificial agents in the future. The artificial agents need detailed information about how to clean a forest stand and/or what are the goals for cleaning. One problem in development of cleaning rules for artificial cleaning agents is that explicit knowledge about good cleaning results is not detailed. In this paper we present a tool for developing and testing rules and judging evaluation functions for cleaning. We illustrate this tool by presenting examples of some ways to clean forest stands in a computer environment and we present how the cleaning results can be evaluated. In order to obtain material for experiments it is also possible to simulate forest stands using this tool.

  • 10.
    Aktan, Mikael
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Dynamic hair effects2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    Creating three dimensional hair is still one of the hardest elements when creating characters. Problems occur because of the constant changes in the software every few years. A major goal is to create as realistic hair as possible in Autodesk Maya and to supply this detailed information on to other 3D artist. Techniques are researched and reviewed on how different hair systems are created, as well as how dynamic effects react on the moving hair.

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    FULLTEXT01
  • 11.
    Al-Asadi, Yousif
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences.
    Streit, Jennifer
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences.
    Identifiering av UNO-kort: En jämförelse av bildigenkänningstekniker2023Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Engaging in the social game of UNO represents a form of social interaction aimed atpromoting enjoyment. Each UNO card deck consists of five different colors (blue,red, green, yellow and joker) and various symbols. However participating in such agame can be frustrating for individuals with color vision impairment. Since a substantial portion of the game relies on accurately identifying the color of each card.The overall purpose of this research is to develop a prototype for object recognitionof UNO cards to support individuals with color vision impairment. This thesis involves comparing object recognition methods, namely Convolutional Neural Network (CNN) and Template Matching (TM). Each method will be compared with respect to color and symbol recognition both separately and combined.  

    The development of such a prototype will be through creating and training two different CNN models, where the first model focuses on solely symbol recognitionwhile the other model incorporates both color and symbol recognition. These models will be trained though an algorithm called YOLOv5 which is considered state-ofthe-art (SOTA) with fast execution. At the same time, two models of TM inspiredmethods, hue template test and binary template test, will be developed with thehelp of OpenCV and by creating templates for the cards. Each template will be usedas a way to compare the detected card in order to classify it. Additionally, the KNearest Neighbor (KNN) algorithm, a machine learning algorithm, will be developed specifically to identify the color of the cards. Finally a comparative analysis ofthese methods will be conducted by evaluating performance metrics such as accuracy, precision, recall and latency. The comparison will be carried out in betweeneach method using a confusion matrix for color and symbol in respective models.

    The study’s findings revealed that the model combining CNN and KNN demonstrated the best performance during the validation of the different models. Furthermore, the study shows that template tests are faster to implement than CNN due tothe training that a neural network requires. Moreover, the execution time showsthat there is a difference between the different models, where CNN achieved thehighest performance.

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    Identifiering av UNO-kort - En jämförelse av bildigenkänningstekniker
  • 12.
    Ameen, Havar
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Sabra, Zakaria
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Moderna processutvecklingsverktyg för organisationer2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna C-uppsats ämnar att studera prioriteringar hos användare i ett system för processutveckling, med syftet att skapa underlag för en omarbetad implementation. I vissa organisationer handlar det om att öka utnyttjandegraden av investerade resurser, och en sådan plattform ger en bättre kontroll över vilka delar i ett system som påverkas av processförändringar. Underlaget för den konkreta implementation bestod till stor del av resultaten från en enkätstudie, där slutanvändare av ett existerande prototypsystem fick dela med sig av sina synpunkter. Resultatet från studien kombinerades också med relevanta vetenskapliga artiklar och litteraturstudier för att skapa underlag för modellen för den nya plattformen. En stor faktor som påvisades utifrån studien är behovet av tillgänglighet. Detta innefattar bl.a. tydligare relationer mellan entiteter, koncis presentation av data och snabbare informationsåtkomst. Modellen som skapats representerar ett system där fokus på ett dynamiskt och responsivt gränssnitt i kombination med tillgänglighet och logiska arbetsflöden utgör plattformen.

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    Moderna processutvecklingsverktyg för organisationer
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    Rådata för enkätstudien
  • 13.
    Amin, Ahmed Angelus
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Morales, Federico
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Positionering och tid som faktorer i mobilanpassade enkäter: En kontextmedveten prototyp2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det finns ett ökat problem med att färre personer väljer att delta i enkätundersökningar, både vad gäller webbenkäter och traditionella postenkäter. En möjlig lösning på problemet skulle kunna vara att ta tillvara på det faktum att det blir allt vanligare att personer väljer att använda sig av mobila enheter för att lösa vardagssysslor. Kanske kan man bättre använda sig av den tekniska utvecklingen och samhällsutvecklingen som allt mer går över till digitala lösningar och på så sätt bidra till ett ökat deltagande i enkäter. Denna uppsats har undersökt om det är möjligt att använda tekniken kontextmedvetenhet för att skapa mobilanpassade enkäter. Detta genom att tillverka en prototyp av en mobilapplikation som kan skicka frågor till smartphones beroende på dess position. Det är möjligt genom mobila enheters egna GPS-mottagare. Enligt den utvärdering som utförts finns det tecken på att användaren upplever det lättare att svara på frågor genom denna prototyp än deras tidigare upplevelser. Dessutom visar resultatet att funktionerna i vår kontextmedvetna prototyp fungerar så som önskat.

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    fulltext
  • 14.
    Amundsen, Nicklas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    The Possibilities and Limitations of Teaching Through Multi User Virtual Environments2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The use of computers has grown immensely in the last decades and the possibility to teach through them has grown as well. Various computer applications, games and forums have been created as tools of teaching and learning. This research project contains a summary of various works created within the E-learning area and their results. The virtual world Second Life is tested and some of the research in the literature review will be visited and examined. The research focuses on the feasibility to create scenarios for nursing students to practice patient care and handling, in addition to collaborative qualities that online virtual worlds offer. The conclusion taken from this research is that the possibilities far outweigh the limitations and that learning through virtual worlds should be further explored and developed.

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    The Possibilities and Limitations of Teaching Trough Multi User Virtual Environments
  • 15.
    Andersson, Claes
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Generering och testning av geografiskt data inom GIS2021Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Enhetstestning mot databaser inriktade mot geografiska informationssystem kan vara ett komplicerat arbete att utföra. Det innebär både att ha tillgång till användbart data samt att använda verktyg för att utföra dessa tester på. Denna studie har undersökt hur data bestående av ytor kan genereras och hur verktyg inriktade på enhetstestning mot databaser kan användas för att uppnå en förbättrad arbetsmetodik för enhetstestning mot databaser. Arbetet har resulterat i förslag på metoder som kan användas för att generera geografiska data. En applikation har utvecklats för att generera dessa data. Dessutom har en metod för att genomföra enhetstester mot en postgreSQL databas, baserad på verktyget pgTAP, presenterats. Föreslagna metoder kan möjliggöra en förbättring av arbetsmetodiken vid enhetstestning mot databasermen det finns fortfarande många förbättringar att utforska.

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  • 16.
    Andersson, Fredrik
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Applikationsutveckling för Android2012Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta projekt handlar om ett applikationsutvecklingsprojekt för Androidplattformen vilket innefattar Androids uppbyggnad, Javaprogrammering, design i XML miljö, grunder i Eclipse samt publicering på Google Play (före detta Android market). Projektet resulterar i en Androidapplikation i form av ett enkelt Pongspel med olika funktioner som highscorelista samt att uppsatsen beskriver det man behöver kunna för att utveckla applikationer för Android.

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  • 17.
    Andersson, Johan
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Hiller, Thomas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Mobile Learning för elever med läs- och skrivsvårigheter2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna utredning visar att förekomsten av mobilapplikationer specifikt riktade till dyslektiker är i det närmaste obefintlig. Dessutom är forskningen på området M-Learning mest inriktad på integrerade M-Learning-system och inte på enskilda applikationer. M-Learning (mobilt lärande) är ett forskningsområde som kan sägas vara en vidareutveckling av E-Learning. Detta är ett växande forskningsområde och med explosionen av smarta telefoner och surfplattor bör för- och nackdelarna med  M-Learning kunna utnyttjas i större utsträckning. På uppdrag av Gävle kommun och med handledning av Sogeti har en prototyp mobilapplikation för elever med dyslexi utvecklats för Android-plattformen. Prototypen som framtagits visar att en mobilapplikation för elever med dyslexi med fördel kan utnyttja mobila enheters multimodalitet.

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  • 18.
    Andersson, Martin
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Olofsson, Marcus
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Methods for Freezing Time with Computer Graphics Imagery2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The most effective method to create an illusion of frozen time in film media was explored for this research. Starting with a description and evaluation of different methods of achieving the effect, this document describes the implementation of a specific technique for a particular project to test freezing time. It was also established to aid students in their understanding of the process in both pre- and post-production. After testing and researching, the method of filming still-posing actors with a high speed camera was chosen. However, the testing and pre-production phase demanded a large amount of time, therefore for the remainder of the project only one scene was established. For budget and time consuming purposes the two recommended techniques are; camera projection and filming still-posing actors with a high speed camera. The choice between these two methods mainly depends on the amount of camera movement.

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    FULLTEXT01
  • 19.
    Andersson, Sebastian
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Karaktärsdesign: från koncept till färdig spelkaraktär2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Denna rapport innefattar skapandeprocessen för en spelkaraktär. Vilka metoder som används i dagens industri och vilka verktyg som artisterna använder för att en 3dkaraktär till next-gen spel. Den undersöker även vilka slags tekniker som används för att skapa en personlighet och ett utseende som gör karaktären minnesvärd. Vilka metoder som kan användas för att skapa en viss känsla hos karaktärer. Rapporten går också igenom en av alla de olika vägarna man kan ta för att skapa en karaktär från koncept till färdig spelkaraktär. Detta med hjälp av välkända program och tekniker som används.

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    FULLTEXT02
  • 20.
    Andersson, Tomas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Controlling the fluid dynamics: an analysis of the workflow of fluids2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    A scene containing dynamic fluids can be created in a number of ways. There are two approaches that will highlight the problems and obstacles that might occur. Today’s leading fluid simulator, RealFlow, simulates the fluid dynamics. A comparison between the two approaches will be made and are analyzed. Through experimentation, one of the approaches fails to produce the set requirements in the experiment and furthermore the two approaches differ in efficiency.

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    FULLTEXT01
  • 21.
    Aslani, Mohammad
    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. Uppsala universitet.
    Efficient and decision boundary aware instance selection for support vector machines2021In: Information Sciences, ISSN 0020-0255, E-ISSN 1872-6291, Vol. 577, p. 579-598Article in journal (Refereed)
    Abstract [en]

    Support vector machines (SVMs) are powerful classifiers that have high computational complexity in the training phase, which can limit their applicability to large datasets. An effective approach to address this limitation is to select a small subset of the most representative training samples such that desirable results can be obtained. In this study, a novel instance selection method called border point extraction based on locality-sensitive hashing (BPLSH) is designed. BPLSH preserves instances that are near the decision boundaries and eliminates nonessential ones. The performance of BPLSH is benchmarked against four approaches on different classification problems. The experimental results indicate that BPLSH outperforms the other methods in terms of classification accuracy, preservation rate, and execution time. The source code of BPLSH can be found in https://github.com/mohaslani/BPLSH. 

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    fulltext
  • 22.
    Aspenfelt, Zebastian
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Game art workflow: Open-source and comercial programs2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    For years, game companies have been using different programs for the creation of the newest most inspiring games. A short presentation about different programs used for game art is provided with key aspects in developing art for games in character production. One aim is to showcase the potential of open-source programs. Two projects with two different characters were created for games testing the workflow between open-source, free application and also commercial programs. The results of the projects are discussed and then the document focuses on explaining what the negative side of open-source programs is and why they should not be used. After the discussion, a conclusion is made explaining the similarities and differences between open-source and commercial programs.

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    fulltext
  • 23.
    Aurosell, Rickard
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Linde, Daniel
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Utveckling av tjänsteplaneringssystem2012Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Högskolan i Gävle har inget gemensamt system för tjänsteplanering. Processen är ineffektivt och innefattar ifyllandet av Excel-ark. Detta arbete omfattar designen och skapandet av ett tjänsteplaneringssystem åt en tjänsteplanerare vid HiG. Det som efterfrågades var ett system som är smidigare och ger möjlighet att överblicka det som planerats. Systemet behövde bara stödja en användare. Ett system skapades som består av en databas och en användarapplikation som kommunicerar med databasen. Som databas användes MySQL och applikationen skrevs i Java. Befintliga datakällor på HiG med kurser och personal används för att minimera mängden manuell inmatning. Systemet är en fungerande lösning klart för användning som överträffade beställarens förhoppningar.

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  • 24.
    Axelsson, Jessica
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Svenvall, David
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Integrating Autodesk Mayas muscle simulation with Kinect motion capture2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstract

    In most of the animation pipelines today, motion capture and different simulations e.g. Autodesk Maya Muscle is used to get a more realistic feel of an animation. The main goal of this Thesis is to make a character appear and move in as natural a way as possible and exploring different methods on receiving a good result. It will answer different question on how to record movement and using that data together with a system that simulates muscles. To complete this process we will record using a Microsoft Kinect Camera, which is originally hardware for Xbox movement software. For our muscle simulation we used Autodesk Maya Muscle, where we built a muscle system. This will be research through finding information on each subject separately and trough experiments combing the two together

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    Integrating Autodesk Mayas muscle simulation with Kinect motion capture
  • 25.
    Axelsson, Per
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    SWEPOS Karttjänst2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
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    SWEPOS Karttjänst
  • 26.
    Barreby, Martin
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    When is it Necessary to Use Muscle Systems to Enhance 3D Animation?2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

     

    To build muscles to enhance the animation of a 3D character takes more time and effort than the standard character rig. In some cases, the muscles will not be noticeable and therefore are unnecessary. This research tried to find the moments when the muscles did or did not make a difference. The new Maya Muscle System is also explored and the procedure to create muscles for a standard rig is explained. The test that was performed showed that the muscles are more noticeable in all cases.

     

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  • 27.
    Bergh, Daniel
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Wistbacka, Stefan
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Projekt privat webshop2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Beställaren har efterfrågat för sin hobbyverksamhet en egen webshop där hon kan sälja sina produkter. Beställaren vill ha en användarvänlig sida för att kunna locka så bred publik som möjligt. I framtiden så kan sidan utvecklas till att låta fler säljare ha sina produkter på sidan. Sidan ska ha grundläggande funktioner som en fungerande varukorg, tydlig produktvy samt ett gränssnitt för att administrera produkter. De språk som sidan har utvecklats i är PHP, HTML5, MySQL och CSS. Sidan är en grund med möjlighet till många utvecklingsmöjligheter både funktions och designmässigt. Vårt mål är att göra en fungerande prototyp.

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    exjobb_Daniel_Bergh_Stefan_Wistbacka
  • 28.
    Berglund, Oskar
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Förbättring av det grafiska användargränssnittet i Autodesk Maya i relation till måttriktig 3D-modellering2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Inom 3D-grafik, visualiseringar, spel och VR finns ett behov av måttriktig modellering. Traditionellt så används CAD-program för att uppnå ett exakt eller precist resultat. Men då CAD-program inte utmatar polygonal geometri så fungerar det inte att använda resultatet direkt i tidigare nämnda kategorier. Denna studie ämnar att underlätta måttriktig polygonal modellering i Autodesk Maya genom ett tillägg i form av ett grafiskt användargränssnitt. Effektiviteten av detta mäts genom tidtagning på modellering av CAD-ritningar i polygoner hos en testgrupp både med och utan tillägget samt en kvalitetskontroll där resultatet jämförs med specifikationen. Medelresultatet av testgruppens användning av tillägget var en förbättring i tidsåtgång gentemot endast Maya. Geometrin hade även bättre måttriktighet.

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  • 29.
    Bergström, Adam
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences.
    Larsson, David
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences.
    Automatiserad mönsterigenkänning av stenmurar2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Automated pattern recognition of stone walls, within both point cloud and image processing, can help identify previously inaccessible areas than with only image pro-cessing. This is important as stone walls are biotopes and serve as structures and have ecological functions for both plants and animals. An automated pattern recog-nition can also benefit Sweden with the fulfillment of the national environmental quality objectives, as well as several commitments from the EU which promote the preservation of biological diversity and cultural heritage. However, conventional airborne laser scanners, via airplanes, have not had a sufficiently high point density and penetration of dense forests. This study therefore aims to use an improved tech-nology in Light Detection and Ranging (LiDAR), where data is collected from Sin-gle Photon LiDAR (SPL). Then, the automated pattern recognition will be used to discover stone walls in varied terrain.

    After the evaluation, two out of five stone walls were identified, one of which had rendered 99.99% of the target area and the other had a 75% target area, although both also displayed one false hit outside of the desired area. The remaining missing area, as well as the other stone walls, could not be identified because of nearby fac-tors such as shrubbery and trees, but even though the method selection for this study did not provide a 100% match on all stone walls, the data from the SPL tech-nology is still useful for pattern recognition with its point density and penetration. The conclusion of this work is that a point cloud filtering must be improved, if not adapted for each area of stone walls, to create better areas of interest before image processing of segmentation and pattern recognition can be implemented. However, the study shows that a combination of point cloud and image processing for auto-matic pattern recognition is a useful way of identifying stone walls.

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  • 30.
    Björklund, Jesper
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Svensson, Mischa
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Webbapplikation för utsättning och registrering av fågelholkar med hjälp av multikriterieanalys2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    På grund av kalhuggning har förutsättningen förändrats förhålboende fåglar. Bohålsbristen går att åtgärda med placering av nya fågelholkar. Genom att använda GIS går det att strategiskt välja de bästa områdena att sätta ut nya fågelholkar. Med hjälp av crowdsourcing och mobiltelefoner går det kartlägga holkarna som kan användas som underlag för nyplacering eller som hjälp för analys som t.ex. arters spridning. Studien visar hur man kan erhålla ett system för multikriterieanalys i realtid online för mobiltelefoner som utnyttjar crowdsourcing och öppna standarder. PostGIS, Leaflet, Geoserver, PyWPS, GRASS GIS har använts för att uppfylla kraven på prototypen. Tidsåtgången av detta system utvärderades genom att mäta tiden för utförande av algoritmen och tiden för förfrågan till utritningen av resultatet. Resultatet visar att det är möjligt att utföra multikriterieanalyser på kort tid som är acceptabel för användare av smarta mobiltelefoner på fält och att det går att urskilja närliggande fågelholkar. Denna metod skulle kunna anpassas för liknande scenarion.

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  • 31.
    Björklund, Niklas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Acting in animation2009Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    It is important to remember actors and animators are similar in many respects, but also very different in some. They both frame and provide life to a character, through thoughts and feelings. To obtain a better understanding of how professional animators work and what methods they use, this thesis contains general background information on animation and the Principles in Animation, as well as the analysis of acting and the different acting concepts. By studying these methods and utilizing them in my own work, a short animation was developed to visualize a characters personality through his actions. The result was then applied to a questionnaire to determine if the audience could pick out the characters personality only through the animation without dialog, music, or sound. According to the interviewed audience, they could feel some of the characters emotions and pick out some of the inner thoughts and feelings from the animation.

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  • 32.
    Björklund, Peter
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Felrapportering av datakonvertering2008Student paper second term, 10 points / 15 hpStudent thesis
    Abstract [sv]

    Projektet Connect hos Sandvik system development efterfrågar en applikation för att lösa rapporteringen av sina datakonverteringar mellan olika system. Systemet som data konverteras till är PeopleSoft, som är ett av Oracels databassystem. Applikationen skapas med hjälp av diverse verktyg som finns integrerade i PeopleSofts egna verktygspaket PeopleTools, där PeopeCode som är PeopleSofts egna programmeringsspråk inkluderas. Applikationen genererar en rapport innehållande tre delrapporter, varav en delrapport på fel och avvikelser som skett under en konvertering, en delrapport där data innan och delrapport med relevant data gällande en konvertering.

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  • 33.
    Björkman, Pontus
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    A Muscular Rig for Smooth Skinning in Autodesk Maya2007Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    The limitations of the default skinning methods in Autodesk Maya can be compensated for when seeking realistic skin deformations of a human being. The main focus is put on the construction of an example muscular rig in Autodesk Maya, and an explanation of what criteria the rig is supposed to fulfill. From a merged three dimensional and artistic view, the components of the rig is discussed and evaluated to establish an understanding of how the system needs to work in order to produce realistic skin deformations. The research is performed via design and creation experiments on the various parts of the system, and even though the initial theory has met its demands, some of the practical performance yet abandons a lot to wish.

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  • 34.
    Blom, Andrej
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Comparing FumeFx with Autodesk Maya Dynamic System2008Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [en]

    One of the main problem areas within computer graphics is simulating natural phenomena’s, working with fluid solvers, and particle systems. In the special effects industry, there is a demand for mimicking appearance of common special effect such as fire, smoke, and water. Autodesk Maya and FumeFx are used for exploring those methods in creating smoke and fire simulations and implementing those into a

    large dynamic system, while researching the possibility to efficiently control and modify an entire dynamic system on a per object level. Final production renders results are from both Maya and FumeFx.

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  • 35.
    Blomqvist, Daniel
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    3D-visualizations for building interiors in a GIS perspective2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Presented in this work is a visualization in 3D of building interiors. Fields such asfacility management is of interest for this concept. Data that is to be visualized has,unlike most previous GIS, access to the third dimension to describe floors of abuilding in a realistic manner. Tests to determine strengths and weaknesses of 3Dconcepts compared to widely known 2D concepts is being performed. Factors toconsider in visualization theory is taken into context to combine visualization andGIS. The results is expected to have positive effects for users interested in facilitymanagement.

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  • 36.
    Blomqvist, Eva
    et al.
    Linköping University.
    Lindecrantz, Mikael
    Linköping University.
    Blomsma, Fenna
    Universität Hamburg, Germany.
    Lambrix, Patrick
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology. Linköping University.
    De Meester, Ben
    IMEC - Ghent University, Belgium.
    Decentralized Digital Twins of Circular Value Networks - A Position Paper2022In: Proceedings of the Third International Workshop on Semantic Digital Twins: Co-located with the 19th Extended Semantic Web Conference (ESWC 2022) / [ed] Raúl García-Castro, John Davies, CEUR Workshop Proceedings , 2022Conference paper (Refereed)
    Abstract [en]

    Circular economy aims at reducing value loss and avoiding waste, by circulating material or productparts before they become waste. Today, lack of support for sharing data in a secure, quality assured, andautomated way is one of the main obstacles that industry actors point to when attempting to create newcircular value networks. Together with using different terminologies and not having explicit definitions ofthe concepts that appear in data, this makes it very difficult to create new ecosystems of actors in Europetoday. A solution to these challenges needs to leverage open standards for semantic data interoperabilityin establishing a shared vocabulary (ontology network) for data documentation, as well as create adecentralized digital platform that enables collaboration in a secure and confidentiality-preservingmanner. This vocabulary can then be used to construct digital twins of circular value networks to furtherenable open collaboration. Once defined, the blueprints of these digital twins will be reusable as templatesand can be reused with a different set of actors, or used within a different industry domain. This visionincludes a number of open research problems, including the development of ontologies that need to modela wide range of different materials and products, not only providing vertical interoperability but alsohorizontal interoperability, for cross-industry value networks. As well as transdisciplinary research onmethods to find, analyse and assess new circular value chain configurations, and form their decentralizeddigital twins. The solutions will allow for automation of planning, management, and execution of circularvalue networks, at a European scale, and beyond. Thereby supporting the acceleration of the digitaland green transitions, automating the discovery and formation of new collaborations in the circulareconomy. 

  • 37.
    Boberg, Julia
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Analys av navigering och dess påverkanberoende av webbdesign: UX experiment med hjälp av Google Analytics2022Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Växande närvaro på Internet med utökade funktioner av webbsidor medför problematik för företagen. Problematiken grundar sig ofta i design av webbsidan. Webbdesignen har genom forskning visat sig vara en stor byggsten för företagens framgång. Framgången ligger i antalet unika besökaren och dess varaktighet påwebbsidan. Vi har genom följande arbete utfört ett experiment baserat på forskning inom User Experience med webbutveckling i åtanke. Analysering av användare och dess navigering på webbsidorna i experimentet samlas in och analyseras med hjälp av Google Analytics. Google Analytics presenterar insamlat data med möjlighet till anpassning i form av diagramtyp. Det insamlade data stödjer forskningens slutsats att färgen har en signifikant betydelse i webbdesign. Experimentet hade 32 testare där den optimala färgen utmärkte sig med kortare tid spenderad i navigering på webbsidan.

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  • 38.
    Bodenhem, Peter
    et al.
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Eckmar, Fredrik
    University of Gävle, Department of Mathematics, Natural and Computer Sciences.
    Metoder för interaktiv systematisk validering av personal inom äldreomsorgen2006Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
    Abstract [sv]

    OFF-E är ett pågående projekt som drivs av Sandvikens kommun. Det är ett projekt som planerar att utveckla en ny form av validering inom kompetensområdet vård och omsorg. Detta sker med utgångspunkt ifrån en befintlig plattform utvecklad av Mapaz MZ. Valideringen sker i dagsläget manuellt. De olika skeden i den aktuella valideringen är kartläggning, självskattning, individuell arbetsplan, teoretisk och praktisk validering, bedömning av delmål och komplettering av utbildningsinsatser. Detta resulterar i en anpassad studieplan samt redan godkända betyg i den specifika kursen. Med nya tekniska förutsättningar fanns anledning att ompröva denna metod. Genom att ett nytt verktyg utvecklas och utformas i tre delar: Teoretisk validering och utbildning, praktisk validering och utbildning (Scenarion), praktisk validering och utbildning i ett försöksrum. Syftet med vår uppsats är att utveckla delen som berör praktisk validering och utbildning via scenarion och cases. Vi har bestämt oss för att försöka skapa olika metoder för detta, för att sedan bestämma vilken av dessa som är mest lämpad ur ett användarvänligt perspektiv. Metoden vi tar fram kommer kunna tillämpas i framtida utvecklingsprojekt.

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  • 39.
    Bolin, Pernilla
    et al.
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Liljebrand, Emma
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Kvalitativa intervjuer för framtagning av metadata och data/geodata: för blåljusaktörer2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Idag har blåljusaktörerna (räddningstjänsten, polismyndigheten och ambulanssjukvården) inte samma kartmaterial att arbeta efter. Detta innebär att de har olika kartbilder att jobba med. Detta skulle kunna lösas med hjälp av ett gemensamt kartstöd och en touch av metadata. Metadata är data om data och blir allt vanligare i datasammanhang. Då data blir mer och mer innehållsrikt och mer komplicerat blir vikten av metadata större. Metadata kan liknas vid en innehållsförteckning till ett examensarbete. Utan innehållsförteckning och rubriker skulle arbetet vara svårt att läsa igenom.  Metadata hjälper bl.a. till så vi kan dela datamängder men ser också till att data hålls uppdaterat. Data och geodata kan användas utan metadata men med den fås en beskrivning av hur aktuell data är, vilka rättigheter vi har att använda den o.s.v. Syftet med studien var att få fram det geodata och metadata som blåljusaktörerna har gemensamt i sin verksamhet. Detta för att underlätta framställandet av en gemensam blåljuskarta, så att aktörerna kan utföra sina uppdrag på ett så tidseffektivt sätt som möjligt. Genom intervjuer med de tre blåljusaktörerna fick vi reda på vilka data/geodata varje aktör har av intresse. Genom att jämföra aktörernas svar med varandra lyckades gemensamma geodata som cykelbanor och husnummer lokaliseras. Ur geodata kunde sedan metadata som, uppdatering, entrésida m.fl. extraheras.

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  • 40.
    Boström, Erik
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Computer Science.
    Taligenkänning i fabriksmiljö: Påverkan av bakgrundsljudets frekvens & typ av ljud2022Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Detta arbete, som utförts i samband med Monitor ERP är en undersökning av potentiell användning av Automatic speech recognition (ASR) i deras system.Delen av Monitor där ASR skulle vara intressant stämplingsterminalen, används ofta i miljöer med högt bakgrundsljud. Syftet är att ta reda på hur högt bakgrundsljud får vara för att ASR ska fungera samt undersöka hur faktorer som frekvens och typ av ljud påverkar denna gräns. För att göra detta har ljud spelats in på plats i fabriker samt hämtats online, dessa ljud har sedan överlappats med ett inläst manus med olika volymer på bakgrundsljudet. Resultatet av detta visar att för högt ljud gör det omöjligt att använda ASR men vid 80 dB börjar korrektheten nå nivåer som är användbara. Det framgår att frekvens har större betydelse än typ av ljud.

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  • 41.
    Boström, Joel
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management.
    Building a GIS Web Service for Mobile Phone and Evaluating its Usability: Case study – A cleanliness index GIS2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study aims to identify key usability factors in a GIS (Geographical Information System) web service for mobile phone. The study also includes a usability evaluation of such a prototype. The prototype was created with the objective of evaluating the cleanliness in the city of Gävle and involving the users in keeping the city clean. Research on the subject of usability was performed in preparation for the development of the prototype. The subsequent usability test that was performed showed that the prototype was highly usable in consideration to efficiency, learnability and satisfaction. However in regards to effectiveness, the prototype was in its current state not highly usable.

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  • 42.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    A methodology for exploring students’ experiences and interaction with large-scale software through role-play and phenomenography2008In: ICER '08: proceedings of the fourth international workshop on Computing education research, New York: ACM , 2008, p. 27-38Conference paper (Refereed)
    Abstract [en]

    Traditional interview methods within qualitative research often capture the purely academic perspective on phenomena. To address this problem, an innovative research method, combining role-playing with phenomenography is proposed. The approach suggested in this paper aims to stimulate participants to widen their perspectives by encouraging them to a deeper engagement with a specific activity, thereby enabling them to reflect actively on their actions and on concepts involved in a specific situated context. In the outlined strategy, the role-playing involved realistic work with large-scale software. This was immediately followed by a debriefing using phenomenographic research interviews when the participants still had the experience fresh in mind. The phenomenographic analysis of the interview transcripts confirmed that the method was successful. The subjects frequently expressed their understanding of theoretical concepts in relation to their experiences from working with the software. The more advanced ways to experience the phenomena was often expressed – and sometimes inspired – by the software’s way to take advantage of the concepts. The specific use of the described method resulted in empirical insights into how students experience object-oriented concepts in software engineering, such as the Java Interface.

  • 43.
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    A Student Perspective on Software Development and Maintenance2010Report (Other academic)
    Abstract [en]

    How do Computer Science students view Software Development and Software Maintenance? To answer this question, a Phenomenographic perspective was chosen, and 20 Swedish students at four universities were interviewed.

    The interviews were analyzed to find in which different ways the informants, on collective level, see the phenomena of interest. The resulting outcome spaces show that software development is described in a number of qualitatively different ways reaching from problem solving, design and deliver, design for the future and then a more comprehensive view that includes users, customers, budget and other aspects. Software maintenance is described as correcting bugs, making additions, adapting to new requirements from the surroundings, and something that is a natural part of the job.

    Finally, conclusions from the results and additional observations are discussed in terms of their implications for teaching, and some suggestions for practical use are given.

  • 44.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Automated Analysis of Dynamic Web Services2002Report (Other academic)
    Abstract [en]

    For a web application test-engineer, it would be convenient to have a map, in form of a graph, describing the functional topology of the application. In that way, it would be possible to analyse the possible paths which can be navigated to discover redundancies and circularities for example. A web spider tool can automate the construction of such a graph. The spider can request a document from the application, find all references to other documents in it, and explore them recursively until all the references have been analysed. However, web services often produce dynamic responses which means that the content cannot be distinctly represented by its reference, i.e., the responses must be classified in a way that matches the users perception. The main problem is to find suitable criteria for this classification. This study describes how to make such a tool and it surveys ideas for how to create a classifying identifier for dynamic responses. The implemented spider was used to make experiments on selected web services, using different models for web node identification. The result is a proposal of suitable criteria for classification of dynamic responses, coming from web applications. These criteria are implemented in algorithms which use the parse structure and the set of internal references as the dominant terms of identification.

  • 45.
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    On the Road to a Software Profession: Students' Experiences of Concepts and Thresholds2010Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Research has shown that there are gaps in knowledge between newly hired and experienced professionals and that some of these gaps are related to concepts, such as the concepts of object orientation. This problem, and the fact that most computer science majors want to work in the software industry, leads to questions regarding why these gaps exist and how students can be better prepared for their future careers. Against this background, this thesis addresses two theme-based perspectives that focus on students' views of concepts in Computer Science.

    The first theme-based perspective investigated the existence of potential Threshold Concepts in Computer Science. Such concepts should be troublesome, transformative, irreversible, and integrative. Qualitative methods have been mainly used and empirical data have been collected through semi-structured interviews, concept maps, and written stories. The results identified two Threshold Concepts, suggested several more, and then described the ways in which these concepts have transformed students.

    The second theme-based perspective took a phenomenographic approach to find the variation in how students understand concepts related to the software profession. Data were collected via semi-structured interviews. In one study the interviews were held in connection with role-playing where students took on the role of a newly hired programmer. The results show a variety of ways to experience the addressed phenomena in the student collective, ranging from superficial views that often have a practical nature to more sophisticated understandings that reflect a holistic approach, including a professional point of view.

    Educators can use the results to emphasize concepts that are important from students' perspectives. The phenomenographic outcome spaces can help teachers to reflect upon their own ways of seeing contrasted with student conceptions. I have indicated how variation theory can be applied to open more sophisticated ways of seeing, which in this context stresses the professional aspects to help students prepare for becoming professional software developers.

  • 46.
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Students' different understandings of class diagrams2012In: Computer Science Education, ISSN 0899-3408, E-ISSN 1744-5175, Vol. 22, no 1, p. 29-62Article in journal (Refereed)
    Abstract [en]

    The software industry needs well-trained software designers and one important aspect of software design is the ability to model softwaredesigns visually and understand what visual models represent. However, previous research indicates that software design is a difficulttask to many students. This article reports empirical findings from aphenomenographic investigation on how students understand classdiagrams, Unified Modeling Language (UML) symbols, and relationsto object-oriented (OO) concepts. The informants were 20 Computer Science students from four different universities in Sweden. The results show qualitatively different ways to understand and describe UML class diagrams and the ‘‘diamond symbols’’ representing aggregation and composition. The purpose of class diagrams was understood in a varied way, from describing it as a documentation to a more advanced view related to communication. The descriptions of class diagrams varied from seeing them as a specification of classes to a more advanced view, where they were described to show hierarchic structures of classes and relations. The diamond symbols were seen as ‘‘relations’’ and a more advanced way was seeing the white and theblack diamonds as different symbols for aggregation and composition. As a consequence of the results, it is recommended that UML should be adopted in courses. It is briefly indicated how the phenomenographic results in combination with variation theory can be used by teachers to enhance students’ possibilities to reach advanced understanding of phenomena related to UML classdiagrams. Moreover, it is recommended that teachers should put more effort in assessing skills in proper usage of the basic symbols and models and students should be provided with opportunities to practise collaborative design, e.g. using whiteboards.

  • 47.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Students' Understanding of the Concept of Interface in a Situated Context2009In: Computer Science Education, ISSN 0899-3408, E-ISSN 1744-5175, Vol. 19, no 1, p. 15-36Article in journal (Refereed)
    Abstract [en]

    The paper describes an empirical study with the aim of producing insights about how students experience programming and software engineering. The research aims to investigate the students’ world, and hence, we have chosen a phenomenographic approach. Our questions focus on the students’ experience of concepts related to a realistic programming task in an extensive software system, particularly the Java Interface. The results show that there is a distinct variation of descriptions spanning from a concrete to-do list to a more advanced description where the interface plays a crucial role in order to produce dynamic and adaptive systems. We interpret the results and suggest how they can be used in teaching to provide an extended and varied understanding for how to work with advanced software.

  • 48.
    Boustedt, Jonas
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Students working with a large software system: experiences and understandings2007Licentiate thesis, monograph (Other academic)
    Abstract [en]

    This monograph describes an empirical study with the overall aim of producing insights about how students experience the subject Computer Science and its learning environments, particularly programming and software engineering.

    The research takes a start in the students' world, from their perspective, using their stories, and hence, we have chosen a phenomenographic approach for our research. By interpreting the students' descriptions and experiences of various phenomena and situations, it is possible to gain knowledge about which different conceptions students can have and how teaching and the learning environment affect their understanding. In this study, we focus specifically on students' conceptions of aspects of object-oriented programming and their experiences of problem solving situations in connection with object-oriented system development.

    The questions posed enlighten and focus on the students' conceptions of both tangible and abstract concepts; the study investigates how students experienced a task concerning development in a specific software system, how they conceived the system itself, and how the students describe the system's plugin modules. Academic education in programming deals with abstract concepts, such as interfaces in the programming language Java. Hence, one of the questions in this study is how students describe that specific abstract concept, in a context where they are conducting a realistic software engineering task.

    The results show that there is a distinct variation of descriptions, spanning from a concrete to-do list, to a more advanced description where the interface plays a crucial role in order to produce dynamic and adaptive systems. The discussion interprets the results and suggests how we can use them in teaching to provide an extended and varied understanding, where the educational goal is to provide for and strengthen the conditions for students to be able to learn how to develop and understand advanced software.

  • 49.
    Boustedt, Jonas
    University of Gävle, Faculty of Engineering and Sustainable Development, Department of Industrial Development, IT and Land Management, Computer science.
    Ways to Understand Class Diagrams2010Report (Other academic)
    Abstract [en]

    The software industry needs well trained software designers and one important aspect of software design is the ability to model software designs visually and understand what visual models represent. However, previous research indicates that software design is a difficult task to many students. This paper reports empirical findings from a phenomenographic investigation on how students understand class diagrams, UML symbols and relations to object oriented concepts. The informants were 20 Computer Science students from four different universities in Sweden.

    The results show qualitively different ways to understand and describe UML class diagrams and the "diamond symbols" representing aggregation and composition. The purpose of class diagrams was understood in a varied way, from describing it as a documentation to a more advanced view related to communication. The descriptions of class diagrams varied from seeing them as a specification of classes to a more advanced view where they were described to show hierarchic structures of classes and relations. The diamond symbols were seen as "relations" and a more advanced way was seeing the white and the black diamonds as different symbols for aggregation and composition.

    As a consequence of the results, it is recommended that UML should be adopted in courses. It is briefly indicated how the phenomenographic results in combination with variation theory can be used by teachers to enhance students' possibilities to reach advanced understanding of phenomena related to UML class diagrams. Moreover, it is recommended that teachers should put more effort in assessing skills in proper using of the basic symbols and models, and students should get many opportunities to practise collaborative design, e.g., using whiteboards.

  • 50.
    Boustedt, Jonas
    et al.
    University of Gävle, Department of Mathematics, Natural and Computer Sciences, Ämnesavdelningen för datavetenskap.
    Eckerdal, Anna
    McCartney, Robert
    Moström, Jan Erik
    Ratcliffe, Mark
    Sanders, Kate
    Zander, Carol
    Threshold concepts in computer science: do they exist and are they useful?2007In: SIGCSE Bulletin inroads, ISSN 0097-8418, Vol. 39, no 1, p. 504-508Article in journal (Other academic)
    Abstract [en]

    Yes, and Yes.

    We are currently undertaking an empirical investigation of “Threshold Concepts” in Computer Science, with input from both instructors and students. We have found good empirical evidence that at least two concepts—Object-oriented programming and pointers—are Threshold Concepts, and that there are potentially many more others.

    In this paper, we present results gathered using various experimental techniques, and discuss how Threshold Concepts can affect the learning process.

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