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  • 51. Bäckman, R
    et al.
    Christiernin, Linn G.
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Mankefors-Christiernin, Stefan
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    MIDAS: a process support tool for multi-layered designsIn: Journal of Information Technology Theory and Application, ISSN 1552-6496, E-ISSN 1532-4516Article in journal (Other academic)
  • 52. Calås, G.
    et al.
    Christiernin, Stefan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Robustness Analysis and Technology Forecasting: Survey on a Missing Combination in Software Development2006In: Proceedings of the International conference on Software Engineering :: innsbruck, Austria, 2006, p. 329-334Conference paper (Other academic)
  • 53.
    Calås, Göran
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Mankefors-Christiernin, Stefan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    A First Draft of RATF: A Method Combining Robustness Analysis and Technology Forecasting2006In: Information Technology: New Generations, 2006. ITNG 2006. Third International Conference on, 2006, p. 72-77Conference paper (Other academic)
    Abstract [en]

    This paper is based on an extensive study performed on a large software suite for over a decade. From the experiences derived from this study we created a first draft of a method combining an extended robustness analysis (RA) method with the future oriented method of technology forecasting (TF). In this method TF provides information about the systems future evolution to the RA which then generates the software design. The RA and TF methods then form a feedback loop, which results in an improved reusable and robust software design. The purpose of the RATF method is to predict the evolutional path of the software system, thus making preparations for (example) functionality that will be needed in future generations, i.e. utilizing the power-of-prediction to implement the base of tomorrow's functions today

  • 54.
    Calås, Göran
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Mankefors-Christiernin, Stefan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Combining robust analysis and technology forecasting: A missing combination in contemporary methods2006In: Proceedings of the IASTED International Conference on Software Engineering: as part of the 24th IASTED International Multi-Conference on APPLIED INFORMATICS, Innsbruck, 2006, p. 329-334Conference paper (Other academic)
    Abstract [en]

    Seven software engineering methods and one general purpose system engineering method TRIZ was evaluated concerning their abilities to combine software technology forecasting, that is prediction of potential software evolution with robustness analysis, which is a method to model a system tolerant to changes. None of the investigated software engineering method or process concepts combines software technology forecasting with robustness analysis to any great extent. Several of the methods evaluated do contribute with techniques and principles, that potentially could be combined and give systematically technology forecasting with comprehensively robustness analysis though. This defines a new frontier for research into a combined "super class" method for software development.

  • 55.
    Cardon, Peter W.
    et al.
    University of South Carolina.
    Marshall, Bryan
    Georgia College, State Univ.
    Choi, Jeongil
    Soongsiil Univ.
    El-Shinnaway, Maha. M.
    American Univ. of Cairo.
    North, Matthew
    Washington Jefferson College.
    Svensson, Lars
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Wang, Sujie
    Nankai Univ.
    Noris, Daniel T.
    McNeese State University.
    Cui, Lixin
    Beijing Institute of Technology.
    Goreva, Natalya
    Point Park Univ..
    Raungpaka, Voraphan
    Kasetsart University.
    Usluata, Ayseli
    Kasetsart University.
    Whelan, Catherine
    Georgia College & State Univ.
    Cho, Juyun
    Colorado State Univ. - Pueblo.
    Collier, Caroline
    Georgia College & State Univ.
    Nillson, Stefan
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Ravid, Gilad
    University of Haifa.
    Valenzuala, Juan Pablo
    Georgia College & State Univ..
    Online and offline social ties of social network website users: An exploratory study in eleven societies2009In: Journal of Computer Information Systems, ISSN 0887-4417, Vol. 50, no 1, p. 54-64Article in journal (Refereed)
    Abstract [en]

    This study presents results of a survey about social network website (SNW) usage that was administered to university students in China, Egypt, France, Israel, India, Korea, Macao, Sweden, Thailand, Turkey, and the United States. The offline and online social ties of SNW users were examined by nationality, levels of individualism-collectivism (I-C), gender, SNW usage, age, and access location. Contrary to existing literature, we found no differences in the number of offline friends between individualist and collectivist nations. Similarly, there was not a difference in the number of online social ties between individualist and collectivist nations. However, members of collectivist nations had significantly more online social ties never met in person. Heavy SNW users in individualist nations maintained significantly higher numbers of offline social ties; however, heavy SNW users in collectivist nations did not have higher numbers of offline social ties. Related implications and recommendations are provided.

  • 56.
    Carlsson, Lotta
    et al.
    University West, Department of Economics and IT, Division of Media and Design.
    Ramare, Isabella
    University West, Department of Economics and IT, Division of Media and Design.
    Visionen av det framtida stadslivet: En semiotisk analys av informationsfilmer om det Västsvenska paketet2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The future is often created by visions since we tend to strive towards them to reach the future wedesire, a vision can thus affect both lives and destinies (Rubin, 2013:40). Therefore it's relevant to attempt to understand how visions of the future are visualized and communicated. It's also important for these visualizations to be well-made and thought-through so that people understand and want to follow the vision (Baum, Locke, Kirkpatrick, 1998:45). We chose to examine this phenomenon by studying three movies about the West Swedish Package; The dream of the good life (2011), West Swedish Package - an investment that paves the way for the future (2014) och Västsvenska Paketet - Möten mellan människor (2014). Using a semiotic analysis we examined how the vision of future urban life was presented. We also looked at the rhetorical elements that are used to present the vision. We found several similarities in how the vision was presented in the films. Overall they show a very optimistic future. They paint a picture of the good life where only certain kinds of people and lifestyles are depicted. On the rhetorical plane they use a lot of emotionally persuasive arguments (patos), they try to gain trust (etos) and they use some logical arguments (logos). We also discuss if an overly optimistic image of the future could generate a negative response, especially in such ad ebated topic as the West Swedish Package.

  • 57.
    Carrasco Henriksson, Rebecka
    University West, Department of Economics and IT, Division of Media and Design.
    En läkande lek: Digitala spel som stöd till ett barn i sorg2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Games are a natural part of many people's everyday lives and have gone from being a divergent interest to become Sweden's biggest cultural export. As a result from this expansion, digital tools had to be further developed and through this progress these tools have reached new areas of usage, which has created new challenges for game developers. The games that offers a higher purpose than pure entertainment goes under the genre serious games. Serious games are used in various application areas such as; in the military, health care, education, business, and psychology, which is the framework of this thesis. By combining and unifying previous research grounded in psychology and game science I want to answer the questions: How can games be used as a therapeutic tool in a child's grieving process? and, Which features should such a game focus on? These questions are answered through the information gathered from two interviews conducted with respondents that have different expertise within the area of this study, this to reach a broader perspective.

    A child's grieving process can manifest itself in various ways depending on the individual's level of sensitivity. It is therefore difficult to draw any general conclusions on how such a game should be designed. All games have the opportunity to motivate and engage, but this is not unique to a serious game and therefore a measurement function is essential in a digital rehabilitation tool to provide the therapist with valuable information about the patient.

    The figurative language makes it possible for the child to communicate where the spoken language sometimes has limits. For older children social support can be important as it creates opportunities to meet others in similar situations and together work towards improvement.

    Grief is a non-linear process and can present itself in many different ways and it is therefore important that the game should offer various turn-outs to make it adaptable for the individual.

  • 58.
    Carstensen, Peter H.
    et al.
    Technical University of Denmark, Denmark.
    Lundh Snis, Ulrika
    University West, Department of Informatics and Mathematics.
    On knowledge management: a field study2000In: Internet-Based Organisational Memory and Knowledge Management, IPG Group Publishing , 2000, p. 170-198Chapter in book (Refereed)
    Abstract [en]

    It is widely acknowledged that knowledge is one of the most important assets of today's organizations. According to Davenport and Prusak (1998), knowledge is often a company's greatest competitive advantage in a global economy. How to support the company's knowledge-intensive work processes (e.g., quality support, product design or strategic planning) is therefore becoming a vital issue in many organizations worldwide. Identification, analysis and characterization of the knowledge-intensive work processes become essential in order to qualify a discussion of how to support knowledge management processes. This chapter presents, discusses and reflects upon findings from a study of how highly skilled actors manage information and knowledge, i.e., how information is gathered from a wide range of sources, structured according to needs and relevance for the users, and disseminated to the relevant suppliers in the organization. The aim of the chapter is two-folded: first, to contribute to the general empirical body of knowledge about knowledge-intensive work, especially focusing on the central characteristics of the knowledge management processes; secondly, to initiate a discussion of which overall requirements we must set up for how knowledge management processes could be supported by means of information and communication technology. Knowledge-intensive work processes often concern collaborative problem-solving and mutual support that require effective ways of handling information and knowledge between different people, both in short-term and long-term situations. The distributed and dynamic nature of knowledge management work also imposes a high degree of complexity involving many different actors with different conceptualizations, interpretations, perspectives, needs, etc. of the knowledge produced and approached. The various actors have different perspectives on the concept of knowledge. The work needed to articulate knowledge and make information and knowledge accessible becomes extremely demanding and complex. Often face-to-face interaction is required. However, in complex and collaborative work settings the problem of articulating knowledge by rich interaction and communication is obvious. The actors are distributed both geographically and temporally. There is a need for computer-based mechanisms for interaction and coordination of information and knowledge (cf. e.g., Carstensen and Wulf, 1998).

  • 59.
    Cederlund, Jonas
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Grahl, Mathias
    University West, Department of Economics and IT, Divison of Informatics.
    Native- vs webbapplikation i Sverige: Vilka för- och nackdelar ser svenska applikationsföretag på native- kontra webbapplikation och vad har de för behov av offlinefunktionalitet i webbapplikationer?2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Since Apple launched their first iPhone that introduced applications inside mobile phones, it has become a growing trend to create applications for every possible purpose. From the beginning, when applications grew popular, they were developed using a native language as a foundation, but today you can develop applications in many different ways. So how does development look in Swedish application companies? Do they use native- or web applications, and what differences do they see between native- and web applications? In the meantime, web applications have evolved and become more advanced to a degree where they have started to replace desktop applications and use complex business logic. The browser was not originally supposed to be the software platform it has become today and web technology is having problems keeping up with the pace of the needs.

    The biggest difference between web applications and desktop applications or native applications is currently offline availability as a consequence of web applications not being installed like regular applications. Based on a request from a company that is developing web applications, this survey has with the help of a group interview and questionnaires taken a deeper look as to what the need is for offline availability and what possibilities there are. The results show that the companies surveyed view native applications as more responsive and better suited for processor and graphics intensive tasks while web apps are considered advantageous due to its cross-platform nature.The survey shows that there is a certain need for offline functionality among the companies but it is complicated to implement. Ready-made solutions and strategies for offline functionality can be applied to web applications.

  • 60.
    Cerna, Katerina
    et al.
    Gothenburg University, Gothenburg, Sweden.
    Islind, Anna Sigridur
    University West, School of Business, Economics and IT, Divison of Informatics.
    Lundin, Johan
    Gothenburg University, Gothenburg, Sweden.
    Steineck, Gunnar
    The Sahlgrenska Academy, Jubileumsklininken, Sweden.
    Decision-support System for Cancer Rehabilitation: Designing for Incorporating of Quantified Data into an Existing Practice2018In: Proceedings of the 10th Nordic Conference on Human-Computer Interaction / [ed] Gerd Berget, ACM Publications, 2018, p. 747-753Conference paper (Other academic)
    Abstract [en]

    Recent development in self-monitoring devices indicates that using quantified data in clinical practicesupporting chronic diseases management holds a big potential. However, exploration of this design space also suggests that some unattended challenges still exist, such as a low adoption rate of self-monitoring tools in existing clinical practice. In this text, wetherefore focus on the ways healthcare professionalsuse quantified data in their practice. We draw onempirical data from an ethnographic study of a cancer rehabilitation center. Our preliminary findings suggestthat the self-monitoring tool supported the nurses'work because it became a functional complement totheir work by allowing them to appropriate the deviceto their and the patients' needs.

  • 61.
    Chaath, Hiba
    University West, Department of Economics and IT, Divison of Informatics.
    The emergence of a new profession: The knowledge base for integration workers in civic orientation2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Sweden has been a target for immigrants since the Second World War. However, in the last few years a huge number of immigrants had moved to Sweden. To integrate the new immigrants fast in the society, Sweden has updated the integration policy. One of the changes in the integration policy is to offer a mandatory course about the Swedish society for immigrants, called civic orientation course. The course is conducted in the immigrants' mother tongue which increases the recruitment demands for integration workers who master two languages (Swedish and immigrants' mother language) and have a pedagogical knowledge. Integration workers teach immigrants with different backgrounds, ages, and educational level. In addition, the demands for such a job have a dynamic nature that depends on the immigrants' need of the course. This study is an exploratory research that aims to investigate the knowledge and skills for the integration workers and the organization's role in developing the integration workers' competence. This research is carried out by comparing two case studies in Trollhattan introduction centrum and Gothenburg integration centrum. The data were collected using in-depth semi-structured interviews; eight interviews were held in Gothenburg integration centrum and two in Trollhattan introduction centrum. The interviews were analyzed using a qualitative content analysis method. The results showed that integration workers have different backgrounds and expertise and they integrate their previous experiences into their job. There is an agreement on some certain skills as classroom management, conflicts handling and dialogue activation. The integration organizations offer different activities to develop the knowledge of the integration workers. However, the organizations under the study face challenges in benefiting from the integration workers' individual knowledge and activating sharing knowledge inside and outside the organization. A cooperative knowledge creation model for the integration organizations is suggested to enhance the knowledge management process and push for establishing a shared knowledge base for the field of integration work in civic orientation. Wiki is suggested as a mean for implementing the cooperative knowledge creation model. Wiki is a collaborative tool that can stimulate the knowledge creation and enable knowledge sharing at both individual and organizational levels. Moreover, it can enhance the organizations' collaboration. Thus, it can direct the integration organizations towards standardization in course's design and the development of the integration work field.

  • 62.
    Choquet, Isabelle
    et al.
    University West, Department of Engineering Science.
    Javidi Shirvan, Alireza
    University West, Department of Engineering Science, Division of Production Engineering.
    Nilsson, Håkan
    Chalmers University of Technology, Department of Applied Mechanics,412 96 Gothenburg, Sweden.
    On the choice of electromagnetic model for shorthigh-intensity arcs, applied to welding2012In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 45, no 20, p. 205203-Article in journal (Refereed)
    Abstract [en]

    Four different approaches were considered for modelling the electromagneticfields of high-intensity electric arcs: i) the three-dimensional model, ii) the twodimensionalaxi-symmetric model, iii) the electric potential formulation, and iv) themagnetic field formulation. The underlying assumptions and the differences betweenthese models are described in detail. Models i) to iii) reduce to the same limit for anaxi-symmetric configuration with negligible radial current density, contrary to modeliv). Models i) to iii) were retained and implemented in the open source CFD softwareOpenFOAM. The simulation results were first validated against the analytic solutionof an infinite electric rod. Perfect agreement was obtained for all the models tested.The electromagnetic models i) to iii) were then coupled with thermal fluid mechanicsin OpenFOAM, and applied to the calculation of an axi-symmetric Gas Tungsten ArcWelding (GTAW) test case with short arc (2mm) and truncated conical electrode tip.Models i) and ii) lead to the same simulation results, but not model iii). Model iii)is suited in the specific limit of long axi-symmetric arc, with negligible electrode tipeffect. For short axi-symmetric arc, the more general axi-symmetric formulation ofmodel ii) should instead be used.

  • 63.
    Choquet, Isabelle
    et al.
    University West, Department of Engineering Science.
    Lucquin-Desreux, Brigitte
    University Pierre and Marie Curie, Paris, France.
    Non equilibrium ionization in magnetized two-temperature thermal plasma2011In: Kinetic and Related Models, ISSN 1937-5093, E-ISSN 1937-5077, ISSN 1, Vol. 4, no 3, p. 669-700Article in journal (Refereed)
    Abstract [en]

    A thermal plasma is studied accounting for both impact ionization, and an electromagnetic field. This plasma problem is modeled based on a system of Boltzmann type transport equations. Electron-neutral collisions are assumed to be much more frequently elastic than inelastic, to complete previous investigations of thermal plasma . A viscous hydrodynamic/diffusion limit is derived in two stagesdoing an Hilbert expansion and using the  Chapman-Enskog method. The resultant viscous fluid model is characterized by two temperatures, and non equilibrium ionization. Its diffusion coefficients depend on the magnetic field, and can be computed explicitely.

  • 64.
    Christiernin Gustafsson, Linn
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Gustavsson, M.
    Ohlsson, A.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Prototyping a Multi-Layered Help - a User Involved Exploratory Design2006In: Proceedings of the International Conference on Applied Computing: San Sebastian, Spain. Feb 25-28, 2006, p. 315-323Conference paper (Other academic)
  • 65.
    Christiernin, Linn G.
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Guiding the designer: a radar diagram process for applications with multiple layers2010In: Interacting with computers, ISSN 0953-5438, E-ISSN 1873-7951, Vol. 22, no 2, p. 107-122Article in journal (Refereed)
  • 66.
    Christiernin, Linn G.
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Pros, cons and problems with the MLD concept: M+ a suggestion for the next generation of layered structuresIn: Journal of Computer Science and Technology, ISSN 1000-9000, E-ISSN 1860-4749Article in journal (Refereed)
  • 67.
    Christiernin, Linn G.
    et al.
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Mankefors-Christiernin, Stefan
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Olsson, A
    Boklund, Andreas
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    A case study evaluation of RDPM: a process confirmed successfulIn: Interacting with computers, ISSN 0953-5438, E-ISSN 1873-7951Article in journal (Refereed)
  • 68.
    Christiernin-Gustafsson, Linn
    University West, Department of Engineering Science, Division of Manufacturing Processes.
    Människor, Robotar och Maskiner2014In: Fokus Industri : Den svenska ekonomins motor, no November, p. 22-22Article in journal (Other (popular science, discussion, etc.))
  • 69.
    Christiernin-Gustafsson, Linn
    et al.
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Martin, Anneli
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    A multi-Layered aesthetical web-portal interface for governmental integration issues2010In: Proceedings of the Workshop on Advanced Visual Interfaces AVI 2010, Rome, 2010, p. 341-344Conference paper (Refereed)
    Abstract [en]

    The County Administrative Board, a governmental authority in The West Region of Sweden, has in collaboration with the local Counties asked us for advice in presenting information in an official and simple way on the web for the foreign person or refugee, just arrived in Sweden. Administrator officers and social workers are taking part in their introduction. In this paper, we describe our investigation and study in how to present a web design for a "newcomer" in Sweden through a multi-Layered design concept, a kind of design which will interact with each person's needs. In this multipurpose concept and portal, it has been important to consider aesthetical values, layout and graphic design. It has also been important to design a layout that provides different users with different contents. Copyright © 2010 ACM.

  • 70.
    Collin, Hans
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Maslovski, Andrej
    University West, Department of Economics and IT, Divison of Informatics.
    Mobilapplikation som överfallslarm: vid hot och våld inom offentliga verksamheter2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Introduction: The tragic incident that occurred at the school Kronan in Trollhättan ended up with four people being killed intentionally. In situations like this it goes quickly and it is therefore important to quickly inform the environment to minimize the risk that many will be injured. The purpose of the study is to investigate whether a mobile application can be useful as a panic alarm in the public sector.

    Method: The approach has been to carry out a qualitative study to gain knowledge about if a mobile application is useful as a panic alarm. Data collection was performed through interviews and focus group interviews. In order to measure the user experience of using a mobile application as panic alarm we developed a prototype that the respondents got to test. Perceived usefulness is influenced by perceived ease of use; therefore we placed great emphasis on designing a usable interface. To develop a usable user interface we used Nielsen's ten rules; later the user interface was evaluated with the respondents.Theory: In order to answer the research question we have used the Technology Acceptance Model 2. The model makes it possible to measure how a mobile application will be accepted and used by two basic factors, perceived usefulness and perceived ease of use. Nielsen’s heuristic consists of ten rules, which have been applied to design and evaluate the user interface.

    Result: The result presents the empirical data collection that has been thematised based on TAM2. It appeared that a mobile application as panic alarm is considered useful. The application is considered useful as an information channel to alert staff at the workplace in an emergency situation, but also so the co-workers can quickly get help from each other. It appeared that the safety and security at the workplace increases with such an application. Conclusion: Staff in the public sector believes that a mobile application is useful as a panic alarm when threat and violence occur. The application is particularly useful as an information channel to quickly distribute information with a SMS to staff at the workplace, but also so co-workers can be able to help each other in an emergency situation. The prototype was perceived as user friendly; it was clear how the prototype worked and the functions were easy to use. The prototype fulfills a need that exists today because there are no similar alarms used in the public sector today.

  • 71.
    Crusner, Maria
    University West, Department of Economics and IT, Division of Media and Design.
    Funktioner för förbättrad träning: En kvalitativ studie om Quantified-selfers uppfattning och erfarenheter kring beteendeförändring i Runkeeper2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to find out how fitness applications should be designed to help Quantified-selfers to change a behavior. This was investigated by interviewing users of the fitness-tracking application Runkeeper, and focused on users experiences, how they use it and in what way their behavior has changed. The study showed that the application had overall improved the users training behavior, but it differed in the way in which it had succeeded. The app was seen as a positive resource that allowed the users to follow and compare their results, which led to that they progressed in their training. What features the users used, which they did not use and which they wanted was individually and depended on the users desired outcome of their training. Finally, it is suggested how future wearable tech regarding fitness can be designed to help Quantified-selfers further to change a behavior.

  • 72.
    Cukur, Adnan
    University West, Department of Economics and IT, Divison of Informatics.
    Utvärdering av SF.se utifrån användbarhetsaspekter: En användarundersökning av SF.se2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    More and more businesses choose to be available online. A website with high usability can lead a way to endless possibilities. A loss of a market that consists of six million potential customers is what awaits businesses that choose to not sell their products online. This is why usability online is important. Usability can be measured with five attributes, learnability, efficiency, memorability, errors and satisfaction. To make sure that these attributes are as high as possible, a developer can make use of techniques that improves a sites usability. A website with high usability will lead to an increase of the websites sales.

    This studys' purpose has been to research about how the users of SF.se experience the usability on the website. An interview has been conducted with five respondents that have answered questions about their background, they have done simple tasks on the website and they have been asked general questions about the websites usability. The data retrieved from the research was analyzed and a conclusion was drawn. The research showed that the website had a high degree of satisfaction, but a couple of usability problems that affect the users' efficiency. The usability can be improved particularly on the part of the website that handles upcoming movies. The information about upcoming movies was insufficient and difficult to find, this lowers the users' efficiency and reflects upon the whole usability aspect of the website.

  • 73.
    Dahl, Emma
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Litavszky, Tamas
    University West, School of Business, Economics and IT, Divison of Informatics.
    Environmental Storytelling och Affordances: En kvalitativ studie av hur environmental storytelling kan påverkas av användning av affordances2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to investigate how the presentation and usage of affordances can affect the players understanding and experience of in-game environmental storytelling. We created a realistic digital game environment with a highly intelligible story that were presented in two different variations, one with obviously marked affordances and one with no markings at all. With these two scenes we performed an experiment with eight participants, four for every scene. After the experiment followed an interview where we got to learn about how deeply the participants interpreted and understood the story in the scene and how affordances might have had affected it. The study showed that different ways of implementing affordances in digital games has a noticeable impact on how environmental storytelling is experienced by the player. This is based on discussions about what the participants told us about their understanding of the story and their overall experience with the game environment. Our conclusion is that the way affordances are implemented and presented in a digital game has an impact on the players experience and understanding of in-game environmental storytelling.

  • 74.
    Dannberg, Sara
    et al.
    University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering.
    Norrman, Maria
    University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering.
    RUFRIS vs Trepunktsmetoden: en jämförelse vid etablering av nya utgångspunkter2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the introduction of the reference system SWEREF99, The national land survey of Sweden no longer takes responsibility for the points that are marked on the ground. This means that the quality of these points is not trustable enough for them to be used in different projects. The purpose of this study was to test and compare two different methods, the Real time updated free station (RUFRIS) and the Three-point method, to establish new points in areas where there are no physical points with known coordinates before. RUFRIS is based on a combination of Real Time Kinematic (RTK), alternatively Network RTK (N-RTK), and measurements with a total station to establish a free station over a point. The Three-point method is based on the combination of half an hour static satellite survey and measuring with a total station to create a network which has a strong internal connection.

    The study brings up which uncertainty one can get with both methods as well as how the methods work in practice. It also aims to illustrate in which situations either of the methods could be used. To conduct the study, a quantitative working method was used. The idea behind this work method was to calculate the coordinates of two points 15 times with both methods. Then a comparison was made between the methods of measurement on the uncertainty in horizontal and vertical coordinates and also on the running time to complete the measurements.

    The conclusion of the study is that there is no difference in the uncertainty in the horizontal and vertical coordinates between the two methods. The RUFRIS method is simpler in its practical execution and it is fully workable with one person. This method can for example be suited for controlling DEM models in road construction. The Three-point method has a strong internal connection between the points because the lengths and angles that are measured with the total station is kept through the transformation. This makes it suitable for construction sites networks. The method contains more steps when using it, which makes it more time consuming and it is also easier to make an error in one of the steps. The Three-point method can be used with one person, but it is less time consuming and considerably easier if two persons work together

  • 75.
    Darwich, Jamal
    University West, Department of Economics and IT.
    Comparative study of Mobile IPv4 and Mobile IPv62011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis has compared the Mobile IPv4 and Mobile IPv6 to find out which of them performs better when it comes to send datagram from the correspondent node to the mobile node. The tests that were made to measure performance were latency, TCP/UDP throughput, loss and delay, as well as time measurement for connectivity loss for the mobile node while roaming. The tests were done using Cisco equipments and Microsoft Windows 7 Professional OS. Due to the hardware and software used, the route of datagram was the same in both scenarios since Cisco routers and Microsoft Windows 7 OS does not support route optimization for Mobile IPv6. The results showed that Mobile IPv4 performed better in all the tests done.

  • 76.
    de Blanche, Andreas
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Operativsystem: teori och praktiskt handhavande2008Book (Other academic)
  • 77.
    de Blanche, Andreas
    et al.
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Lundqvist, Thomas
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    A methodology for estimating co-scheduling slowdowns due to memory bus contention on multicore nodes2014In: Proceedings of the IASTED International Conference on Parallel and Distributed Computing and Networks, PDCN 2014, ACTA Press, 2014, p. 216-223Conference paper (Refereed)
    Abstract [en]

    When two or more programs are co-scheduled on the same multicore computer they might experience a slowdown due to the limited off-chip memory bandwidth. According to our measurements, this slowdown does not depend on the total bandwidth use in a simple way. One thing we observe is that a higher memory bandwidth usage will not always lead to a larger slowdown. This means that relying on bandwidth usage as input to a job scheduler might cause non-optimal scheduling of processes on multicore nodes in clusters, clouds, and grids. To guide scheduling decisions, we instead propose a slowdown based characterization approach. Real slowdowns are complex to measure due to the exponential number of experiments needed. Thus, we present a novel method for estimating the slowdown programs will experience when co-scheduled on the same computer. We evaluate the method by comparing the predictions made with real slowdown data and the often used memory bandwidth based method. This study show that a scheduler relying on slowdown based categorization makes fewer incorrect co-scheduling choices and the negative impact on program execution times is less than when using a bandwidth based categorization method.

  • 78.
    de Blanche, Andreas
    et al.
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Lundqvist, Thomas
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Addressing characterization methods for memory contention aware co-scheduling2015In: Journal of Supercomputing, ISSN 0920-8542, E-ISSN 1573-0484, Vol. 71, no 4, p. 1451-1483Article in journal (Refereed)
    Abstract [en]

    The ability to precisely predict how memory contention degrades performance when co-scheduling programs is critical for reaching high performance levels in cluster, grid and cloud environments. In this paper we present an overview and compare the performance of state-of-the-art characterization methods for memory aware (co-)scheduling. We evaluate the prediction accuracy and co-scheduling performance of four methods: one slowdown-based, two cache-contention based and one based on memory bandwidth usage. Both our regression analysis and scheduling simulations find that the slowdown based method, represented by Memgen, performs better than the other methods. The linear correlation coefficient (Formula presented.) of Memgen's prediction is 0.890. Memgen's preferred schedules reached 99.53 % of the obtainable performance on average. Also, the memory bandwidth usage method performed almost as well as the slowdown based method. Furthermore, while most prior work promote characterization based on cache miss rate we found it to be on par with random scheduling of programs and highly unreliable.

  • 79.
    de Blanche, Andreas
    et al.
    University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
    Lundqvist, Thomas
    University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
    Terrible Twins: A Simple Scheme to Avoid Bad Co-Schedule2016In: Proceedings of the 1st COSH Workshop on Co-Scheduling of HPC Applications / [ed] Trinitis, Carsten ; Weidendorfer, Josef, Munchen, 2016, Vol. 1, p. 1-6Conference paper (Refereed)
    Abstract [en]

    Co-scheduling processes on different cores in the same server might lead to excessive slowdowns if they use a shared resource,like the memory bus. If possible, processes with a high shared resource use should be allocated to different server nodes to avoid contention, thus avoiding slowdown.This paper introduces the simple scheme of avoiding to coschedule twins, i.e., several instances of the same program.The rational for this is that instances of the same program use the same resources and they are more likely to be either low or high resource users − high resource users should obviously not be combined, but a bit non-intuitively, it is also shown that low resource users should also not be combined in order to not miss out on better scheduling opportunities.This is verified using both a statistical argument as well as experimentally using ten programs from the NAS parallel benchmark suite. By using the simple rule of forbidding twins, the average slowdown is shown to decrease from 6.6% down to 5.9%, and the worst case slowdown is lowered from 12.7% to 9.0%, indicating a considerable improvement despite having no information about any programs' resource usage or slowdown behavior.

  • 80.
    de Blanche, Andreas
    et al.
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Mankefors-Christiernin, Stefan
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Availability of Unused Computational Resources in an Ordinary Office Environment2010In: Journal of Circuits, Systems and Computers, ISSN 0218-1266, Vol. 19, no 3, p. 557-572Article in journal (Refereed)
    Abstract [en]

    The study presented in this paper highlights an important issue that was subject for discussionsand research about a decade ago and now have gained new interest with the current advances ofgrid computing and desktop grids. New techniques are being invented on how to utilize desktopcomputers for computational tasks but no other study, to our knowledge, has explored theavailability of the said resources. The general assumption has been that there are resources andthat they are available. The study is based on a survey on the availability of resources in anordinary o±ce environment. The aim of the study was to determine if there are truly usableunder-utilized networked desktop computers available for non-desktop tasks during the off-hours. We found that in more than 96% of the cases the computers in the current investigationwas available for the formation of part-time (night and weekend) computer clusters. Finally wecompare the performance of a full time and a metamorphosic cluster, based on one hypotheticallinear scalable application and a real world welding simulation.

  • 81.
    de Blanche, Andreas
    et al.
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Mankefors-Christiernin, Stefan
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Method for Experimental Measurement of an Applications Memory Bus Usage2010In:   / [ed] Hamid Arabnia, CSREA Press , 2010Conference paper (Refereed)
    Abstract [en]

    The disproportion between processor and memory bus capacities has increased constantly during the last decades. With the introduction of multi-core processors the memory bus capacity is divided between the simultaneously executing processes (cores). The memory bus capacity directly affects the number of applications that can be executed simultaneously at its full potential. Thus, against this backdrop it becomes important to estimate how the limitation of the memory bus effects the applications performance. Towards this end we introduce a method and a tool for experimental estimation of an applications memory requirement as well as the impact of sharing the memory bus has on the execution times. The tool enables black-box approximate profiling of an applications memory bus usage during execution. It executes entirely in user-space and does not require access to the application code, only the binary. 

  • 82.
    de Blanche, Andreas
    et al.
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Mankefors-Christiernin, Stefan
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Minimizing Total Cost ($$) and Maximizing Throughput: A Metric for Node versus Core Usage in Multi-Core Clusters2010In: Proceedings of the International conference on Parallel and Distributed Processing Techniques and Applications:   / [ed] Hamid R. Arabnia, Las Vegas: CSREA Press , 2010, p. 241-248Conference paper (Refereed)
    Abstract [en]

    When most commercial clusters had one processor core each, decreasing the runtime meant executing the application over more nodes – the associated cost (in $) would scale linearly with the number of nodes. However with the recent advances of multi-core processors the execution time can be increased by utilizing more nodes or by utilizing more cores in the same nodes. In the industrial cluster environments a key question is how to run the applications, to minimize the total cost while maximizing the throughput and solution times of the individual jobs. The number of core used and their contribution to the total runtime reduction is especially interesting since companies often use commercial software that is licensed per year and process. The annual license cost of one single process is often far greater than that of a complete cluster node including maintenance and power. In this paper we present a metric for the calculation of the optimal way to run an application on a cluster consisting of multi-core nodes in order to minimize the cost of executing the said job. 

  • 83.
    de Blanche, Andreas
    et al.
    University West, Department of Engineering Science, Division of Automation and Computer Engineering.
    Namaki, Nima
    University West, Department of Engineering Science, Division of Automation and Computer Engineering.
    Mankefors-Christiernin, Stefan
    University West, School of Business, Economics and IT, Division of Computer Engineering.
    Multicore Clusters for CFD Simulations: Comparative Study of Three CFD-Softwares2012In: PROCEEDINGS OFTHE 2012 INTERNATIONAL CONFERENCE ONPARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES ANDAPPLICATIONS, PART II / [ed] Hamid R. Arabnia, Hiroshi Ishii, Minoru Ito Kazuki Joe, Hiroaki Nishikawa, CSREA Press, 2012, p. 855-852Conference paper (Refereed)
    Abstract [en]

    Multicore processors have come to stay, fulfill Moore’s law and might very well revolutionize the computer industry. However, we are now in a transitional period before the new programming models, numerical algorithms and general computer architecture have been developed and the software has been rewritten. This paper focuses on the effects multicore based systems have on industrial computational fluid dynamics (CFD) simulations. The most significant finding was that five of the models ran faster when only one process was executed on each multicore node instead of two. In these cases the execution time was increased by between 6.5% and 64% with a median increase of 10% when utilizing both cores.

  • 84.
    Dervisevic, Amel
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Talos, Robert
    University West, Department of Economics and IT, Divison of Informatics.
    Användaracceptans av videokonferensteknik för samordnad vårdplanering i primärvården: en kvantitativ studie grundad på UTAUT-modellen2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Västra Götaland (VGR) began in the 2000s to introduce an alternative form of meeting, meeting remotely via video, for coordinated care planning at hospital discharge in the region. Hospitals and local authorities have started to use the technology and the format of the meetings but regardless access to materials and training to primary care have a low degree of use. The purpose of this study was to determine the factors that influence the intention to use remote meetings via video technology in primary care. The research question for the study is, what factors affect health professionals' intention to use remote meetings via video in primary care? To find out which factors affect health professionals the study has been based on user acceptance theory called Unified Theory of Acceptance and Use of Technology (UTAUT). The study uses a quantitative approach with web surveys as a tool for data collection because it is best suited with the theory UTAUT. Based on data collected from web questionnaires a result was produced in the Statistical Package for Social Sciences (SPSS) by displaying descriptive statistics and perform a correlation analysis and regression analysis. The result shows that the factors that influence the intention to use the video technology is Performance Expectancy, Effort Expectancy and Social Influence. Beyond that the results show that Faciltitating Conditions have a direct impact on the Use Behavior.

  • 85.
    Donev, Jovan
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Mozaffari, Maxim
    University West, School of Business, Economics and IT, Divison of Informatics.
    Facebook: Gratistjänsten som endast kostar användarens personliga data: En surveyundersökning om svenska Facebook-användares kunskap om Facebooks datainsamling och hur deras användning och kunskap påverkar deras personliga integritet2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Facebook is the largest social media site in the world with the highest amount of users. However, many people do not read Facebook's terms of use and use the service anyway, which possibly means that the user does not know what data Facebook is collecting. The purpose of this study is to investigate how aware Swedish users are about the data Facebook collects about them and how their knowledge and use of the service can affect their personal privacy and security. The method used in this study was web surveys that were sent out to Swedish Facebook users, where questions about how they use the service and what they are believed to know about Facebook's data collection. What emerged from this study was that users today are aware that Facebook collects information about them, but not exactly what type of data. This lackof knowledge, together with how they use Facebook's services, has been shown to affect their personal privacy and security.

  • 86.
    Edstorp, Marcus
    University West, Department of Engineering Science, Division of Production Engineering.
    Weld Pool Simulations2008Licentiate thesis, monograph (Other academic)
    Abstract [en]

    This investigation is devoted to the study of welding and its effect on the workpiece, focusing on the thermo and fluid dynamical phenomena occuring during a autogenous or nonautogenous arc fusion welding process. Its aim is to simulate the behaviour of the weld pool and analyze the consequence of the solid-liquid phase change, thus obtaining a methodology for predicting the appearance of weld defects related to solidification and cooling. In order to accomplish this, we solve equations governing a number of continuum mechanical and electromagnetical quantities, as well as consider the motion of the freely moving boundary of the weld pool. Since the state of these quantities is strongly influenced by phenomena such as arc and droplet impingement, non-isothermal phase change, surface tension, Marangoni forces and Lorentz forces, much effort is necessarily devoted to the modelling of the corresponding fluxes and sources, as well as to the implementation of computationally efficient techniques for simulating the geometrical deformation of the workpiece, which in our setting is entirely determined by the motion of the weld pool surface.

    Common to all arc fusion welding processes is the employment of a welding arc. Many techniques rely on the arc to clean and shield the workpiece during the process, however in this study we consider it to be its main purpose to cause the local increase of thermal energy that is required for the establishment of the weld pool, and also to exert the mechanical forces that provoke the subsequent fluid flow which enhances heat transfer and facilitates weld penetration. The physics of the welding arc itself is quite intricate, and although the modelling of the arc is not the prime objective of this research project, we conclude that arc forces act on the pool surface, and that the investigation of the arc behaviour is important insofar that it provides input to the pool model and thus enables a more accurate prediction of the quality of the weldment that is created once the pool has solidified

  • 87.
    Ek, Christian
    et al.
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Norling, Edvin
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Performance evaluation of a network infrastructure monitored with SNMP polls and traps2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The result of this bachelor thesis is a comparison between three different network devices on how many resources that is used on them when utilizing SNMPv1 and SNMPv2c polls and traps. The devices tested are an old Cisco router, a modern Juniper gateway and a Linux server. The experiments conducted prove that SNMP does not utilize the network devices resources to a point that it becomes an issue for the performance. These tests are done to ensure that SNMP do not use up to many resources on the infrastructure which would decrease the functionality and performance of the network. This study shows whether or not SNMP monitoring is a problem for the enterprise network

  • 88.
    Ekerum, Tommy
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Larsson, Anna
    University West, Department of Economics and IT, Divison of Informatics.
    "Processverkstan": Forum för kommunal e-tjänstutveckling2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study investigates the start of a project on the department for IT in Sotenäs, Munkedal and Lysekil municipalities and on the department handling establishments of businesses in Lysekil. The aim of the study is to describe the startup of process mapping and e-service development in municipal organisation. The focus lies on the early stages and from an internal perspective. On the department for IT, they have just started working with e-service development. Before that there had not been much development of e-services in Lysekil municipality. They have formed a concept which they call "Processverkstan". In this format the different departments of the municipalities are able to get help from the department of IT, who has initialized this, and who will also lead the work. People from departments together with people from department of IT will in workshops be able to draw a process map for the area that is covered by the e-service. The tool that is used is a computer program by the name of Barium Live.

    The study is a qualitative study, performed as a case study. Semi-structured interviews and observations are used to collect data. Theories used are e-services, stakeholders for e-services and process mapping.

    The results from the study show that different stakeholders have cooperated to develop the e-service. The end user has not participated, and the respondents wish to involve the end user in the process of e-service development. They have had a clear focus on why the work is being done - to make the communication between the municipality and the citizen easier when they want to apply for establishment of a business in Lysekil. This has been done with process mapping as a foundation. This means that as you are developing an e-service that is supposed to be of use to the citizen, you are at the same time able to accomplish an activity development. The cooperation has been characterised by engagement, participation and a clear focus on use for the citizen.

  • 89.
    Eklund, Matilda
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Tavakoli Banizi, Farrokh
    University West, Department of Economics and IT, Divison of Informatics.
    Att aktivera mottagaren: en kvalitativ studie av interaktion mellan bild, mottagare och kontext ur ett marknadsföringsperspektiv2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A large part of today's advertising is avoided by consumers who are tired of the endless amount of advertising out there. It makes it difficult for advertising creators to be seen and be able to attract the attention of the target market, which has led to the appearance of the phenomenon interactive advertising. Through the active contribution that the method offers, the advertising becomes more personal and creates a closer connection between transmitter and recipient. A similar but more intrusive method that utilizes the environment like interactive advertising is called guerilla marketing. The purpose of the study is to examine how an effective message can be conveyed within guerilla marketing and interactive advertising through interaction with the two concepts of context and the Zeigarnik effect.

    The methods used in the study are interviews with six informants and document analysis of four representative images illustrating how guerilla and interactive advertising might look like. The study shows that the Zeigarnik effect is used in marketing without advertising creators being aware of it, for instance in terms of the creative circle. It is all about leaving the final piece for the recipient to fill in on their own. The study also shows that a combination of humor and the Zeigarnik effect can increase the advertising effectiveness as humor seems to be desirable for recipients and contribute to higher engagement. Recipients' activities by the advertising image is, according to the study, affected by the social context as personality and the temporary company influences choices and attitude. Finally, the study suggests that guerilla and interactive advertising which utilizes active participation may benefit companies in both short and long term.

  • 90.
    Eneroth Johansson, Martin
    et al.
    University West, Department of Economics and IT, Division of Media and Design.
    Ryås, Cornelia
    University West, Department of Economics and IT, Division of Media and Design.
    Vad som påverkar animatörers val i skapandet av fotorealistisk 3D-animation2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the paper is to show some possible factors that affect the animators’ choices when working on photorealistic animation based on references. Research in computer graphics has since 1970 had as a main goal to achieve photorealism. When working on 3D-production for film, animation is a part of the process. This part aims to give life to digital characters, among other things. References are used as a tool to achieve photorealism. This could for example be a video of animals or people moving in the same way as the characters in the animation is supposed to do. But many experiences show that the animation could be uninteresting and lack credibility if the animator sticks to close to the reference. This forces the animator to deviate from the reference material in order to achieve a photorealistic animation. We want to find out which choices the animators are making in that situation and what they are based upon.

    The paper highlights six animators’ views on what affects their choices when working with photorealistic animation. From the interviews a number of factors that the animators themselves found to affect them, was distinguished. The factors that the paper highlights with the support of theories and the answers from the interviews are clarity, interest, characters, influence of others, time, intuition, judgment, experience, subconscious factors and personal background. 

  • 91.
    Eriksson, Andrea
    et al.
    University West, Department of Economics and IT, Division of Media and Design.
    Persson, Sandra
    University West, Department of Economics and IT, Division of Media and Design.
    Hur Snapchat som applikation integreras i marknadsföringens utveckling inom företag2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    There have been changes in the way companies think about marketing. Developments in technology have made the communication easier and faster. Marketing has gone from focusing on the product or service to a customer-focused mindset where companies want to deepen their customer relationships in order to create more personalized and valuable offers according to the customer needs. Social media has become a major part of everyday life and companies therefore tries to reach their customers there. Since the emergence of new social media and it's growing in popularity, companies need to consider the benefits and how they will use the media in connection with its marketing purposes.

    Snapchat is an application that has increased in popularity and in users in recent years. In the current situation, Snapchat is one of the largest social media among teenagers. Companies therefore begin creating their own Snapchat accounts where users can follow and share their pictures and videos.

    Our thesis aims to examine how companies view the use of Snapchat, from a marketing purpose, and then compare this with previous research on the marketing and use of private Snapchat. We want to find out how Snapchat is different from other social media that companies use and what their strategies are, and how they look on the intimate communication with followers. Through qualitative interviews, we get an understanding of how companies view the topic.

    The result shows that all respondents appreciate the personal and rapid two-way communication. Respondents perceive the application as more spontaneous, unfiltered and playful compared to the other social media that they use. Snapchats interface, however, create problems for companies as they do not have access to a detailed statistical review of its followers and its published content. It is clear to see patterns of the companies' basic concept of marketing and previous research on the topic. Since the development of marketing is constantly changing, the companies are starting to think more different.

  • 92.
    Eriksson, Matilda
    University West, Department of Economics and IT, Division of Media and Design.
    Förståelse och interaktion i Runkeeper: En kvalitativ studie av Quantified-selfers uppfattning och erfarenheter av förståelse och interaktion i Runkeeper2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to find out how Quantified-selfers' interpretation of the collected data occur by describing their experiences. As interaction with the system and the collected data is a contributive element to the interpretation, the purpose was also to see how the interaction occur in a system used by Quantified-selfers, and how the interaction influence and results in their understanding. This was investigated by interviewing users of the fitness-tracking application Runkeeper and observe, and discuss, a reconstruction of their interaction with the application.The study showed that the reflection and interpretation of the statistics of the collected data differed between the users as they saw different patterns and came to different conclusions based upon it. Mainly, the participants perceived the statistics as easy to understand but there were also some obstacles for the interpretation. Interaction played an essential part when the users were to look at the statistics and interpret it. It led to the interpretation by different goals and sub-targets and it occurred when the users explored and abstracted, or elaborated the collected data. In the discussion it is reviewed why the interaction and the interpretation occur the way they do. Finally it is suggested how systems for Quantified-selfers, in the future may be designed to facilitate the reflection and interpretation of the collected data.

  • 93.
    Eriksson, Per
    University West, Department of Economics and IT.
    Införandet av ett dokumenthanteringssystem vid ett gränsöverskridande projekt: Medföljande problem och möjligheter2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report is an independent part of a co-productionproject between several independent parties. The studywas conducted as an experimental case study with a methodical approach on aproject group. The report has been about explore and illuminate the problemsand possibilities a introduction of a document management system will have andleads to. The system is SharePoint and it’s a business collaboration platformfor enterprises. The target audience is primarily the decision makers who arein the process of selecting a technology support, but also researchers andstudents. The project has participants from businesses and college (Saab, VolvoCars, Autoliv and Chalmers) when the study started the project group was usingonly the physical meetings and e-mail to distribute the documents. Theboundaries have been that no valuation of the document's content has occurred,nor have the modules and functions other than those related to documents anddocument management. The study was conducted by questionnaire, observation andparticipant observation and a review of several articles on the subject.Conclusions were that for start the IT department ensures that all files andprograms needed for the environment has been updated before first try. It’s away of reducing the risk of 'information overload' and increasing the ease ofpublishing documents, and improves traceability, availability and versioning ofdocuments with an introduction of a DMS (SharePoint).

  • 94.
    Eriksson, Per
    University West, Department of Economics and Informatics, Divison of Informatics.
    The role for IT-support in Lean concepts: A qualitative study of municipalities2011Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis have the intention of to create a deeper understanding around IT-supports role in Lean concepts, and has been done with a hermeneutic approach and a theory creating approach as a case study with qualitative method, semi-structured interviews has been used as data collecting technique. The interview respondents were one IT-manager and one department manager from 4 municipalities. The data has then been analyzed by part- and comprehensive analysis with a hermeneutic approach and presented in the 4 different cases, that the municipalities used represent, and in one where all is combined. The results show massive use of computers but not any use of IT-support for Lean according to the respondents. Conclusions that where made was that programs like the business system in use in the organization and Microsoft Office package not is seen as a IT-support for Lean despite that several of the respondents use it to do Lean things like processes and that this is more or less considered as an obvious package to have.

    They have a tendency to think it has to be a separate IT-system or program especially made for Lean for it to be important and be interpreted as an IT-support for Lean.

  • 95.
    Eriksson, Åsa
    University West, Department of Economics and IT, Division of Media and Design.
    "Strike a pose, there’s nothing to it": En kvalitativ studie om kvinnor & selfies2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    A selfie is a self-portrait photograph, taken by holding a mobile camera device and pointing it at oneself. Today's technology opens for new imagery and new ways to communicate, and the selfie is a prominent expression in the communication of today. Before social media and the Internet, photos were just physical objects stored in a photo album or a box at home, and the potential audience were limited. With the introduction of social media sites such as Facebook and Instagram, along with the prevalence of smartphones, selfies has become a socially acceptable way of expression available to vast audiences all around the world at the click of a button. But, does a selfie tell as much of our personality as the clothes on our body? The furniture in our homes, or what kind of music we listen to? Can a selfie replace a verbal introduction? How much of an effort is there behind a selfie? The purpose of this study is to investigate how young women interpret, use and consume selfies with the mobile photo-sharing application Instagram as a starting point. In this study I have used a combination of image analysis and group interviews. I have used two different groups of candidates, one that takes "selfies" on a regular basis, and one with lesser "selfie" frequency. I will proceed from Erving Goffman's dramaturgical perspective. Goffman believes that the interaction between people is comparable with a stage performance. The individual chooses their performance based on what kind of stage and audience is at their disposal. Image analysis concludes that a majority of respondents are inclined to take selfies with others. When the respondent is in a group setting it is not uncommon for them to try to fit as many people as possible in the photo, and as a consequence end up themselves on the fringe of the photo. When taking an individual selfie, image analysis shows that the more common setting is indoors, focused on the face of the subject. The majority of the respondent takes their selfies with the mobile phone straight ahead of them. The respondent begins to tilt the mobile phone depending on what she wants to capture in the picture. The study shows that selfies is complex and difficult to define and the appearance is central in the creation of a selfie. As a phenomenon, the selfie is a double edged sword, on one hand a popular form of expression and communication, and on the other it can be received by its viewers as repetitive and vain.

  • 96.
    Eshagh, Mehdi
    Royal Institute of Technology (KTH),Division of Geodesy and Geoinformatics, .
    A strategy towards an EGM08-based Fennoscandian geoid model2012In: Journal of Applied Geophysics, ISSN 0926-9851, E-ISSN 1879-1859, Vol. 87, p. 53-59Article in journal (Refereed)
    Abstract [en]

    Today, the recent global Earth's gravity model, EGM08, is successfully utilised for different purposes in geosciences. Here, EGM08 is used to compute a geoid model for Fennoscandia and since it is restricted to degree and order 2160, the higher frequencies of the geoid, or the truncation bias, is recovered directly from terrestrial gravity anomalies using a simple formula. The total topographic and atmospheric effects are computed and added to the derived geoid as well. A very simple EGM08-based non-integral geoid estimator is developed and applied for computing the geoid of Fennoscandia. The outcome of the estimator is compared with the Global Positioning System (GPS)/levelling data of Sweden, Denmark, Finland and Norway. Numerical results show the successful performance of the presented estimator as the geoid become closer to GPS/levelling data than the one computed solely with EGM08. This study will show that considering the truncation bias of EGM08 will reduce the root mean square error (RMSE) of the differences between the geoid and GPS/levelling data by about 1.3 cm and the additive topographic and atmospheric corrections by 1 cm further. It is shown that the correlations among the data have no significant influence on the estimated geoid.

  • 97.
    Eshagh, Mehdi
    University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
    A theoretical discussion on Vening Meinesz-Moritz inverse problem of isostasy2016In: Geophysical Journal International, ISSN 0956-540X, E-ISSN 1365-246X, Vol. 207, no 3, p. 1420-1431Article in journal (Refereed)
    Abstract [en]

    The Moho surface can be determined according to isostatic theories and the recent Vening Meinesz-Moritz (VMM) theory of isostasy has been successful for this purpose. In this paper, we will study this method from a theoretical prospective and try to find its connection to the Airy-Heiskanen (AH) and Vening Meinesz original theories. We develop Jeffrey’s inverse solution to isostasy according to the recent developments of the VMM method and compare both methods in similar situations. We will show that they are generalisations of the AH model in a global and continuous domain. In the VMM spherical harmonic solution for Moho depth, the mean Moho depth contributes only to the zero-degree term of the series, whilst in Jeffrey’s solution it contributes to all frequencies. We improve the VMM spherical harmonic series further so that the mean Moho can contribute to all frequencies of the solution. This modification makes the VMM global solution superior to the Jeffrey one, but in a global scale, the difference between both solutions is less than 3 km. Both solutions are asymptotically-convergent and we present two methods to obtain smooth solutions for Moho from them. 

  • 98.
    Eshagh, Mehdi
    University West, Department of Engineering Science.
    A theoretical study on terrestrial gravimetric data refinement by earth gravity models2014In: Geophysical Prospecting, ISSN 0016-8025, E-ISSN 1365-2478, Vol. 62, no 1, p. 158-171Article in journal (Refereed)
    Abstract [en]

    The idea of this paper is to present estimators for combining terrestrial gravity data with Earth gravity models (EGMs) and produce a high-quality source of the Earth's gravity field data through all wavelengths. To do so, integral and point-wise estimators are mathematically developed, based on the spectral combination theory, in such a way that they combine terrestrial data with one and/or two Earth gravity models. The integral estimators are developed so that they become biased or unbiased to a priori information. For testing the quality of the estimators, their global mean square errors (MSEs) are generated using an Earth gravity model08 model and one of the recent products of the gravity field and steady-state ocean circulation explorer (GOCE) mission. Numerical results show that the integral estimators have smaller global root mean square errors (RMSEs) than the point-wise ones but they are not efficient practically. The integral estimator of the biased type is the most suited due to its smallest global root mean square error comparing to the rest of the estimators. Due largely to the omission errors of Earth gravity models the point-wise estimators are not sensitive to the Earth gravity model commission error; therefore, the use of high-degree Earth gravity models is very influential for reduction of their root mean square errors. Also it is shown that the use of the ocean circulation explorer Earth gravity model does not significantly reduce the root mean square errors of the presented estimators in the presence of Earth gravity model08. All estimators are applied in the region of Fennoscandia and a cap size of 2° for numerical integration and a maximum degree of 2500 for generation of band-limited kernels are found suitable for the integral estimators.

  • 99.
    Eshagh, Mehdi
    University West, Department of Engineering Science, Division of Natural Sciences and Electrical and Surveying Engineering.
    An integral approach to regional gravity field refinement using Earth gravity models2013In: Journal of Geodynamics, ISSN 0264-3707, E-ISSN 1879-1670, Vol. 68, p. 18-28Article in journal (Refereed)
    Abstract [en]

    The idea of this paper is to refine the terrestrial gravimetric data with the Earth's gravity models (EGMs) and produce a high quality source of gravity data. For this purpose, biased and unbiased integral estimators are presented. These estimators are used to refine gravimetric data over Fennoscandia with the ITG-GRACE2010s and GO_CONS_GCF_2_DIR_R2 EGMs, which are the recent products of the gravity field and climate experiment (GRACE) and the gravity field and steady-state ocean circulation explorer (GOCE) satellite missions. Numerical results show that the biased integral estimator has smaller global root mean square error (RMSE) than the unbiased one. Also a simple strategy is presented to down-weight the low-frequencies the terrestrial data in spectral combination. The gravity anomalies, computed by EGM08, are compared to the refined anomalies for evaluation purpose. In the case of using a cap size of 1° for integration the EGM08 gravity anomalies are more correlated with the refined ones. Also the band-limited kernels can simply be generated to maximum degree of the used EGMs for both estimators. Comparisons of the combined anomalies and those of EGM08 show insignificant differences between the biased and unbiased estimators in practice. However, the biased estimator seems to be proper one for gravity data refinement due to its smaller global RMSE.

  • 100.
    Eshagh, Mehdi
    University West, Department of Engineering Science, Division of Natural Sciences and Electrical and Surveying Engineering.
    Determination of Moho Discontinuity from Satellite Gradiometry Data: Linear Approach2014In: Geodynamics Reseach International Bulletin, E-ISSN 2345-4997, Vol. 1, no 2, p. 1-13Article in journal (Other academic)
    Abstract [en]

    The satellite gradiometry data (SGD) can be used for studying the crustal structure in addition to the Earth’s gravity field. This paper will show how this type of data is related to the Moho discontinuity or the boundary between the Earth’s crust and mantle. Here, the Vening Meinesz-Moritz (VMM) theory of isostasy is used and its mathematical formulae are modified to use the SGD instead of the Earth gravity models. A linear integral equation with a well-behaving kernel is presented by approximating the Moho depth formula derived based on the VMM theory. The error of this approximation is less than 300 m in Iran as the study area. Furthermore, this paper shows that the contribution of the higher degree harmonics than 215 is less than 1% with respect to the total signal of Moho undulations. This means that the use of SGD is meaningful as they sense the harmonics of the Earth’s gravity field to this degree. Two methods of one-step and two-step are proposed for Moho determination and applied in Iran.  It is shown that to reduce the effect of spatial truncation error of the integral formulae of both methods the central area should be smaller by 6 than the inversion area. Numerical studies show that the two-step approach is superior to the other one and the root mean squared error of differences between the Moho model recovered by an Earth gravity model and SGD is about 1.5 km in Iran.

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