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  • 1.
    Abrehdary, Majid
    et al.
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Sjöberg, Lars
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering. Royal Institute of Technology (KTH), Division of Geodesy and Satellite Positioning, Stockholm, SE-10044, Sweden.
    Recovering Moho constituents from satellite altimetry and gravimetric data for Europe and surroundings2019In: Journal of Applied Geodesy, ISSN 1862-9016, E-ISSN 1862-9024, Vol. 13, no 4, p. 291-303Article in journal (Refereed)
    Abstract [en]

    In this research, we present a local Moho model, named MOHV19, including Moho depth and Moho density contrast (or shortly Moho constituents) with corresponding uncertainties, which are mapped from altimetric and gravimetric data (DSNSC08) in addition to seismic tomographic (CRUST1.0) and Earth topographic data (Earth2014) to a resolution of 1° × 1° based on a solution of Vening Meinesz-Moritz' theory of isostasy. The MOHV19 model covers the area of entire European plate along with the surrounding oceans, bounded by latitudes (30 °N–82 °N) and longitudes (40 °W–70 °E). The article aims to interpret the Moho model resulted via altimetric and gravimetric information from the geological and geophysical perspectives along with investigating the relation between the Moho depth and Moho density contrast. Our numerical results show that estimated Moho depths range from 7.5 to 57.9 km with continental and oceanic averages of 41.3 ± 4.9 km and 21.6 ± 9.2 km, respectively, and an overall average of 30.9 ± 12.3 km. The estimated Moho density contrast ranges from 60.2 to 565.8 kg/m3, with averages of 421.8 ± 57.9 and 284.4 ± 62.9 kg/m3 for continental and oceanic regions, respectively, with a total average of 350.3 ± 91.5 kg/m3. In most areas, estimated uncertainties in the Moho constituents are less than 3 km and 40 kg/m3, respectively, but they reach to much more significant values under Iceland, parts of Gulf of Bothnia and along the Kvitoya Island. Comparing the Moho depths estimated by MOHV19 and those derived by CRUST1.0, MDN07, GRAD09 and MD19 models shows that MOHV19 agree fairly well with CRUST1.0 but rather poor with other models. The RMS difference between the Moho density contrasts estimated by MOHV19 and CRUST1.0 models is 49.45 kg/m3.

  • 2.
    Abrehdary, Majid
    et al.
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Sjöberg, Lars E.
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering. Royal Institute of Technology (KTH), Division of Geodesy and Satellite Positioning, Stockholm, SE-100 44, Sweden.
    Sampietro, D.
    GReD S.r.l., Via Cavour 2, Lomazzo (CO), 22074, Italy.
    Contribution of satellite altimetry in modelling Moho density contrast in oceanic areas2018In: Journal of Applied Geodesy, ISSN 1862-9016, E-ISSN 1862-9024Article in journal (Refereed)
    Abstract [en]

    The determination of the oceanic Moho (or crust-mantle) density contrast derived from seismic acquisitions suffers from severe lack of data in large parts of the oceans, where have not yet been sufficiently covered by such data. In order to overcome this limitation, gravitational field models obtained by means of satellite altimetry missions can be proficiently exploited, as they provide global uniform information with a sufficient accuracy and resolution for such a task. In this article, we estimate a new Moho density contrast model named MDC2018, using the marine gravity field from satellite altimetry in combination with a seismic-based crustal model and Earth's topographic/bathymetric data. The solution is based on the theory leading to Vening Meinesz-Moritz's isostatic model. The study results in a high-accuracy Moho density contrast model with a resolution of 1° × 1° in oceanic areas. The numerical investigations show that the estimated density contrast ranges from 14.2 to 599.7 kg/m3 with a global average of 293 kg/m3. In order to evaluate the accuracy of the MDC2018 model, the result was compared with some published global models, revealing that our altimetric model is able to image rather reliable information in most of the oceanic areas. However, the differences between this model and the published results are most notable along the coastal and polar zones, which are most likely due to that the quality and coverage of the satellite altimetry data are worsened in these regions.

  • 3.
    Aghaee, Naghmeh
    et al.
    Stockholm University.
    Karunaratne, Thashmee
    Stockholm University.
    Smedberg, Åsa
    Stockholm University.
    Jobe, William
    University West, School of Business, Economics and IT, Divison of Informatics.
    Communication and Collaboration Gaps among PhD Students and ICT as a Way Forward: Results from a Study in Sweden2015Conference paper (Refereed)
    Abstract [en]

    The low completion rate and slow progress in PhD education have been highlighted in many studies. However, the interaction problems and communication gaps that PhD students encounter make this attempt even more challenging. The aim of this study is to investigate the peer interaction problems and ICT based solutions from PhD students’ perspectives. The data collection method was an online questionnaire and in-depth interviews were used to follow up. The target group for the survey was the PhD students in Computer Science at Stockholm University. The total number of respondents for the survey was 53 PhD students and eleven randomly selected PhD students for the interviews. The results reflected a lack of peer interaction as an important issue in the perspective of the students. Based on this, the study showed several ICT solutions that have the potential to reduce the interaction problems and thereby improve PhD students’ collaborative learning and research quality.

  • 4.
    Ahmad, Ibrahim
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Eriksson, Niels-Oliver
    University West, School of Business, Economics and IT, Divison of Informatics.
    Virtual Reality och Augmented Reality inom pedagogiken: Lärares uppfattningar om Virtual Reality och Augmented Reality som ett hjälpmedel iutbildning på grundskole- och gymnasienivå2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna studie är att med hjälp av en kvalitativ datainsamling undersöka lärares åsikter samt uppfattningar av att tillämpa Virtual Reality och Augmented Reality i utbildningen. För att besvara studiens frågeställningar har empiri samlats in med hjälp av semistruktureradeintervjuer tillsammans med fem lärare från olika skolor i Sverige. Studiens diskussion har haft sin utgångspunkt i tidigare forskning som undersökt tillämpningen av Virtual Reality och Augmented Reality. Utifrån det resultat av de intervjuer som bedrevs med lärarna gick det att hitta ett antal gemensamma och återkommande teman i lärarnas åsikter och uppfattningar om Virtual Reality och Augmented Reality som ett hjälpmedel inom pedagogiken. Resultat visar att lärarna generellt sett är positivt inställda gentemot en framtid där Virtual Reality och Augmented Reality är ett vanligt inslag i pedagogiken, men de menar ändå på att det finns ett antal hinder som måste övervinnas för att nå denna verklighet.

  • 5.
    Ali, Rashid
    University West, Department of Economics and IT.
    Performance of Network Redundancy in SCTP: Introducing effect of different factors on Multi-homing2010Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The main purpose of designing the Stream Control Protocol (SCTP) was tooffer a robust transfer of traffic between the hosts over the networks. For this reasonSCTP multi-homing feature was designed, in which an SCTP sender can access destinationhost with multiple IP addresses in the same session. If the primary path between the sourceand the destination is down, the traffic may still be sent to the destination by utilizingredundant path. And SCTP multi-homing also supports for the concurrent multipathtransfer of traffic. This paper introduces the effect of different network factors likeconcurrent cross traffic, congestion control algorithms and SACK timers on multi -homingfeature of SCTP. Throughput and end-to-end packet delay were used as performancemetrics to introduce the effect of these factors. From the study it was introduced thatconcurrent cross traffic in the network behaves same on multi -homed interfaces and bothinterfaces were affected almost same. It was concluded that congestion control algorithmsalso affects on multi-homing, the RED congestion control algorithm reduced delay andimproved throughput of the SCTP multi-homing. In RFC4960 recommended SACK timeris 200ms, but when 100ms SACK timer was used with concurrent multipath transfer inSCTP (CMT-SCTP) multi-homing, the high throughput and low delay was achieved ascompared with 200ms and 300ms, which indicated that different SACK timers affects onmulti-homing feature of SCTP. All the simulation works have been conducted in NS2network simulator. 

  • 6.
    Alizadeh-Khameneh, Mohammad Amin
    et al.
    KTH Royal Institute of Technology, Division of Geodesy and Satellite Positioning, Stockholm, Sweden.
    Eshagh, Mehdi
    University West, Department of Engineering Science, Division of Mathematics, Computer and Surveying Engineering.
    Jensen, Anna O.
    KTH Royal Institute of Technology, Division of Geodesy and Satellite Positioning, Stockholm, Sweden.
    Optimization of deformation monitoring networks using finite element strain analysis2018In: Journal of Applied Geodesy, ISSN 1862-9016, E-ISSN 1862-9024, Vol. 2, no 2, p. 187-197Article in journal (Refereed)
    Abstract [en]

    An optimal design of a geodetic network can fulfill the requested precision and reliability of the network, and decrease the expenses of its execution by removing unnecessary observations. The role of an optimal design is highlighted in deformation monitoring network due to the repeatability of these networks. The core design problem is how to define precision and reliability criteria. This paper proposes a solution, where the precision criterion is defined based on the precision of deformation parameters, i. e. precision of strain and differential rotations. A strain analysis can be performed to obtain some information about the possible deformation of a deformable object. In this study, we split an area into a number of three-dimensional finite elements with the help of the Delaunay triangulation and performed the strain analysis on each element. According to the obtained precision of deformation parameters in each element, the precision criterion of displacement detection at each network point is then determined. The developed criterion is implemented to optimize the observations from the Global Positioning System (GPS) in Skåne monitoring network in Sweden. The network was established in 1989 and straddled the Tornquist zone, which is one of the most active faults in southern Sweden. The numerical results show that 17 out of all 21 possible GPS baseline observations are sufficient to detect minimum 3 mm displacement at each network point. © 2018 Walter de Gruyter GmbH, Berlin/Boston.

  • 7.
    Amoson, Jonas
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Building complex GUIs in Plan 92009In: Proceedings 4th International Workshop on Plan9, Athens, GA: University of Georgia , 2009, p. 15-21Conference paper (Other academic)
    Abstract [en]

    How can non-trivial graphical user interfaces be designed in Plan 9 without them losing their minimalistic style? Different toolkits are discussed, and a proposal for a tabbed toolbar is suggested as a way to add functionality without cluttering the interface and avoiding the use of pop-up dialog boxes. A hypothetical port to the GUI in LyX is used as an example.

  • 8.
    Amoson, Jonas
    et al.
    University West, Department of Engineering Science, Division of Automation and Computer Engineering.
    Lundqvist, Thomas
    University West, Department of Engineering Science, Division of Automation and Computer Engineering.
    A light-weigh non-hierarchical file system navigation extension2012In: Proceedings of the 7th International Workshop on Plan 9 / [ed] Eric Jul, Dublin, Ireland, 2012, p. 11-13Conference paper (Other academic)
    Abstract [en]

    Drawbacks in organising and finding files in hierarchies have led researchers to explorenon-hierarchical and search-based filesystems, where file identity and belonging is pred-icated by tagging files to categories. We have implemented a chdir() shell extension en-abling navigation to a directory using a search expression. Our extension is light-weightand avoids modifying the file system to guarantee backwards compatibility for applicationsrelying on normal hierarchical file namespaces.

  • 9.
    Ampem, Daniel Kwame Baidoo
    University West, Department of Economics and IT, Divison of Informatics.
    Helping Out Refugees: the Way Forward Stakeholders' Activities for Newcomers in Trollhättan2017Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study used the qualitative research approach to investigate stakeholders' activities, stakeholders' opinions on technology, stakeholders' opinions on newcomers and problems of stakeholders in Trollhättan. Interest was on provided activities of the stakeholders'. With the actor network theory (ANT) framework, the study addressed the problem of newcomers to know about stakeholders' activities in Trollhättan. Semi structured in-depth interviews were conducted on seven stakeholders in Trollhättan municipality. A private company, Trollhättan Municipality Employment Office, the Red Cross, a university and three non-profit organizations. Data were analyzed based on summative content analyses. The study revealed that stakeholders arrange varied types of initiatives but it was hard for refugees that were placed in Trollhättan, especially newly arrived in Trollhättan to get access to the initiatives. The study concluded that reaching out to newly arrived newcomers is a major problem for stakeholders in Trollhättan.

  • 10.
    Andersson, Lisette
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Bengtsson, Christian
    University West, Department of Economics and IT, Divison of Informatics.
    Behovet av ett mobilt informations- och dokumentationsverktyg i hemtjänsten: Personalens perspektiv2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Although the work in home care businesses most often are mobile, the documentation and information management often occurs in information systems through desktop computers. The need for mobile solutions have become more relevant as they may contribute to increased safety, improved quality and time savings. However, research shows that business knowledge is often overlooked in the development of health systems, which contributes to IT support that are not adapted to the business needs. This study aims to increase understanding on how home care staff believes that mobile IT support the care work and organization routines.

    The study was conducted in a home care business through qualitative interviews of six respondents and a thematic analysis model has been used, containing three theoretical areas: Efficiency, Ease of use and Usability, Satisfaction and Motivation. The results show that a mobile IT support would represent a clear advantage in the business and that the existing information system could either be supplemented or replaced. However, the staff still have fears and negative attitudes towards the obstacles and risks of what new technologies can bring to the table.

  • 11. Andersson, M.
    et al.
    Heldal, R.
    Christiernin, Linn G.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Applying task-based division in multi-layered design: an industrial case study2005In: Human-Computer Interaction 2005: Proceeding of The IASTED International Conference on Human-Computer Interaction (IASTED-HCI)Phoenix, USA, November 14 - 16, 2005, Acta Press , 2005Conference paper (Refereed)
  • 12.
    Andersson, Ulf
    et al.
    University West, Department of Economics and IT, Division of Media Production.
    Josefsson, Pernilla
    University West, Department of Economics and IT, Division of Media Production.
    Pareto, Lena
    University West, Department of Economics and IT, Division of Media Production.
    Challenges in designing virtual environments training social skills for children with autism2006In: Proceedings of 6th International Conference on Disability, Virtual Reality and Associated Technologies, University of Reading , 2006, p. 35-43Conference paper (Refereed)
    Abstract [en]

    The purpose of the study is to explore particular challenges faced when designing virtual environments for children with autism, with the purpose of training social skills. Our findings are based on studying autistic behaviour during three years (primary and secondary sources), analysis of related system and other computer mediated assistive technology, as well as general game design. From these studies we have identified eight critical design parameters that need to be adjustable in a system suitable for autistic persons. The parameters importance, their variation range, as well as the need for independent adjustment of these were estimated and verified by experienced expert pedagogues.

  • 13.
    Andersson, Ulf
    et al.
    University West, Department of Economics and IT, Division of Media Production.
    Josefsson, Pernilla
    University West, Department of Economics and IT, Division of Media Production.
    Pareto, Lena
    University West, Department of Economics and IT, Division of Media Production.
    Challenges in designing virtual environments training social skills for children with autism2006In: International Journal on Disability and Human Development, ISSN 1565-012X, Vol. 5, no 2, p. 105-111Article in journal (Refereed)
    Abstract [en]

    The aim of the study was to explore particular challenges faced when designing virtual environments for children with autism, with the purpose of training social skills. Our findings are based on studying autistic behavior during three years (primary and secondary sources), analysis of related system and other computer mediated assistive technology, as well as general game design. From these studies, we have identified eight critical design parameters that must be adjustable in a system suitable for autistic persons. The importance of the parameters, their variation range, as well as the need for independent adjustment of these were estimated and verified by experienced expert pedagogues. Copyright © Freund Publishing House Limited.

  • 14.
    Arghavan Shahlaei, Charlotte
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Lundh Snis, Ulrika
    University West, School of Business, Economics and IT, Divison of Informatics.
    Stenmark, Dick
    University of Gothenburg, Department of Applied Information Technology, Gothenburg, Sweden.
    Organizing in the age of digital product platforms: The work of integrated vehicle control engineers2019In: CEUR Workshop Proceedings, ISSN 1613-0073, E-ISSN 1613-0073, Vol. 2398, p. 17-25Article in journal (Refereed)
    Abstract [en]

    As flexibility and generativity of digitized information continuously afford new possibilities, a significant challenge for organizations becomes pinpointing practices that are befitting from various aspects. Two overarching digitization eras have so far determined the greatness of the challenge for organizations; 'computerization', and 'the Internet'. Today, a third era of digitization is marked by the emergence of digitized products. As increasing numbers of code line and software are being incorporated in previously physical products such as cars, they can be used as complete products on one layer, and simultaneously turn into platforms enabling other firms to develop and integrate new components, content, or services on another layer. As digital product platform's multiple design layers need to be open to various applications and agendas, their development requires new justifications and approaches for organizing work. By applying a Neo Socio-Technical Systems frame of reference on the work of engineers as they engage in developing digitized products, we 1. discuss changes of work and organizing along three eras of digitization, 2. provide a rich empirical instance by identifying what steps engineers take in preparation for developing digital product platforms, and 3. discuss the implications of these steps for the literature on practice and organizing. ©Copyright held by the author(s).

  • 15.
    Aronsson, Andreas
    et al.
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Bäversjö, Jonathan
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Undersökning av gratis WiFi i Göteborg2014Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    This report examines a number of free WiFi-hotspots that are offered by various companies in central Gothenburg and how they compare to the mobile networks. Traffic, capacity, channel frequencies, signal strength and acceptable use policies were all analyzed and verified.

    The readings showed that the networks were generally not utilized to their full capacity, a probable cause might be the distribution of mobile networks and that channel distribution was with a few exceptions allocated correctly according to 802.11 standards. Acceptable use policies on the networks were implemented by the larger chains but not by the smaller companies

  • 16.
    Aronsson, Jonas
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Drechsel, Nils
    University West, Department of Economics and IT, Divison of Informatics.
    Dags att köra agilt!: vilka är de främsta för-­ och nackdelarna med att använda en agil systemutvecklingsmetod?2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det övergripande syftet med studien och rapporten var att bidra till en ökad förståelse kring agila metoder för att kunna fatta beslut om användande av en agil systemutvecklingsmetod är motiverad. Studien var av kvalitativ karaktär och arbetade utifrån frågeställningen "vilkade främsta för- och nackdelarna med att använda en agil systemutvecklingsmetod?". Med hjälp utav djupintervjuer och litteraturstudier samlades empiri och vetenskaplig teori in.Vilken utvecklingsmetod en organisation använder har visats sig vara avgörande för organisationens produktivitet och kvalitet på dess resultat. Den sekventiella metoden har varit normen för IT-utvecklingsprojekt under en lång tid, vilket är orsaken till att vissaorganisationer fortfarande använder den. Allmänna problemen med den sekventiella metoden är att den har svårt att hantera förändringar, svårt att leverera vad kunden efterfrågar samt att modellen skjuter fram riskfulla och utmanande moment till slutet av projektet. Att istället byta till en agil metod kan vara lösningen på dessa problem då metoden är framtagen för att vara flexibel med nära kundsamarbete för att säkerställa att resultatet som levereras stämmer överens med vad kunden efterfrågade. Slutsatsen av studien har visat sig vara att de främsta fördelarna med en agil metod är: Den levererar vad kunden efterfrågar, kan enkelt hantera kravförändringar, är anpassningsbar samt ger enhögre kvalité på slutprodukten. De främsta nackdelarna studien har visat sig vara: Hantering utav dokumentation, svårt att skala upp till stora organisationer samt att metoden är krävande.

  • 17.
    Arriazú Nolasco, Noelia
    University West, Department of Economics and IT, Divison of Informatics.
    Vegan lifestile on Facebook: An online ethnography study2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    In recent years there has been an increase in the number of vegans in the world. The main goal of my research is to understand the vegan struggles in their daily life and study how Facebook might help them solve these difficulties. This master's thesis focuses on the user perspective and how they perceive barriers to follow a vegetarian lifestyle in Spain. The research questions are about finding those barriers and knowing how they could be solved by using Facebook groups. For this purpose, an ethnographic approach has been used.

    The target group of this study are vegans who have gone through the time of change and may have had some problems in making that decision. Fifteen vegans have been interviewed to find challenges that have arisen when they have changed their lifestyles. After that, an online ethnography study has been performed by observing the content of a Facebook group, called "Vegetarianos y Veganos – España", focusing on publications where group members were asking for advice, information or solutions.

    The results indicate that the investigated group of Facebook is essential for the exchange of information, knowledge and experience. The members also contribute to increased knowledge through publications and comments. But most importantly, the members receive solutions to the problems they share with the group.

  • 18.
    Arvemo, Tobias
    et al.
    University West, School of Business, Economics and IT, Divison of Law, Economics, Statistics and Politics.
    Gråsjö, Urban
    University West, School of Business, Economics and IT, Divison of Law, Economics, Statistics and Politics.
    Employment and Economic Activity in Different Swedish Border Regions2015In: Uddevalla Symposium 2015. Regional Development in an International Context. Regional, National, Cross Border and International Factors for Growth and Development: Revised papers presented at the 18th Uddevalla Symposium, 11-13 June, Sönderborg, Denmark / [ed] Iréne Bernhard, Trollhättan: University West , 2015, p. 45-57Conference paper (Refereed)
    Abstract [en]

    This study investigate how the effect of cross border activities between Sweden and its three Nordic neighbours influence the Swedish local economies along the border using municipal data from 2009. Two measures for the local economies are examined, economic activity (measured by gross pay per inhabitant) and employment rates. The Swedish border regions where divided into four regions: The Swedish border to Finland, The Swedish border to the part of Norway not included in the Oslo labour market, The Swedish border to the Oslo labour market, and the Swedish-Danish border region. The regression models show how the the regions compare to the Swedish average when controlled for market structure and accessibility to population. For Sweden's border regions to Denmark and the Oslo labour market there are significant improvements in both economic activity and employment rates when the border activity is included. The improvement is highest for the Oslo border regions. For the Swedish border to Finland and to the part of Norway not included inte the Olso labour market the border activity has no significant influence on either economic activity or employment rates.

  • 19.
    Arvemo, Tobias
    et al.
    University West, Department of Economics and IT, Division of Law, Politics and Economics.
    Gråsjö, Urban
    University West, Department of Economics and IT, Division of Law, Politics and Economics.
    University Colleges Effect on Municipal Growth in Swedish Middle-sized Municipalities2008In: Uddevalla Symposium 2008: Spatial Dispersed Production and Network Governance: Revised papers presented at the 11th Uddevalla Symposium, 15-17 May, 2008, Kyoto, Japan / [ed] Iréne Bernhard, Trollhättan: University West , 2008, p. 85-98Conference paper (Refereed)
    Abstract [en]

    The main purpose in this paper is to study to what extent accessibility to R&D is an important factor of explaining municipal economic growth. Of special interests is the question whether, the effect of company (private) R&D efforts on economic growth differ if a university college is present in the municipality or not. Therefore the empirical analysis is conducted on a reduced dataset (92 out of 290 municipalities), containing only middle-sized municipalities without traditional ´old´ universities. The idea of the selection process was to find two sets of comparable municipalities with one containing municipalities with university colleges and one with municipalities without university colleges. In the empirical analysis a knowledge production function is estimated with the difference in Gross Municipal Product, GMP, between 1993 and 2001 as the output. In order to account for the importance of proximity, the explanatory variables are expressed as accessibilities to university and company R&D. The total accessibility is then decomposed into local, intra-regional and inter-regional accessibility to R&D. The main results show that local and intra-regional accessibility to company R&D has positive effects on economic growth. On the other hand, local accessibility to university R&D is of no importance, while there are influential effects of intra-regional university R&D. Moreover, the presence of university college R&D activities decreases the importance of the local accessibilitiy to company R&D or put it differently, local accessibility to company R&D is more important in municipalitites without university college activities.

  • 20.
    Arvola, Mattias
    et al.
    Linköping University, Department of Information and Computer Science,Linköping, Sweden.
    Samuelsson, Marcus
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Nordvall, Mathias
    Linköping University, Linköping, Sweden.
    Ragnemalm, Eva L.
    Linköping University, Linköping, Sweden.
    Simulated Provocations: A Hypermedia Radio Theatre for Reflection on Classroom Management2018In: Journal Simulation & Gaming, ISSN 1046-8781, E-ISSN 1552-826X, Vol. 49, no 2, p. 98-114Article in journal (Refereed)
    Abstract [en]

    Background. Learning to manage a classroom is a difficult but important part of teacher education. Earlier research on simulations for learning classroom management has highlighted the difficulty of supporting reflection.Purpose. This case study explores and evaluates the design of a simulation for student teachers' reflection on classroom management.Design. The design process resulted in the scenario-based SIMPROV simulation, which was made in the form of a hypermedia radio theatre that students go through in pairs or triads. Authoritarian, authoritative, democratic, and compliant leadership styles were built into the choices student teachers made.Evaluation. The simulation was evaluated in two courses where the participants' level of reflection and perceived knowledge improvement was measured using a questionnaire. Forty-three first-year student teachers, 48 third-year student teachers, and 38 of the student teachers' mentors participated in the evaluation.Results. The results indicate that participants engaged in reflection and understanding to a high degree, and only to a low degree in critical reflection or habitual action.Conclusions. The conclusions are that the scenario-based simulation designed as a hypermedia radio theatre supported knowledge improvement, understanding, and reflection and that social interaction during and after simulation sessions was an important feature.

  • 21.
    Asker Zada, Salar
    University West, Department of Economics and IT.
    Ad Hoc Networks: Performance Evaluation Of Proactive, Reactive And Hybrid Routing Protocols In NS2 2010Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    No infrastructure, no centralized administration and self-configuration are the main characteristics of MANETs. The primary motivation of MANET deployment is to increase portability, mobility and flexibility. However, this mobility causes an unpredictable change in topology and makes routing more difficult. Many routing algorithms have been proposed and tested over the last few years in order to provide an efficient routing in Ad Hoc networks. In this report we will show our conducted study with AODV (reactive), DSDV (proactive) and ZRP (hybrid) routing protocols. The performance of routing protocols have been evaluated carefully by analyzing the affects of changing network parameters such as, number of nodes, velocity, pause time, workload and flows on three performance metrics: packet delivery ratio, routing cost and average end- to- end delay. All the simulation work has been conducted in NS2. Our simulation results show that AODV gives better performance in all designed simulation models in terms of packets delivery ratio. DSDV shows the second best performance. Performance of ZRP is found average.

  • 22.
    Asplund, Carl-Fredrik
    et al.
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Svensson, Max
    University West, Department of Engineering Science, Division of Computer and Electrical Engineering.
    Mätning av uppstartstid i multicastprotokollen PIM dense-mode och PIM sparse-mode2014Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    This report studies which multicast protocol that requires the least amount of time to forward a multicast stream from sender to receiver. The protocols measured are IPv4 PIM dense-mode, IPv4 PIM sparse-mode and IPv6 sparse-mode. The measurements are based on the time between the client announcing participation in a multicast group to actually receiving the first multicast stream packet from the router. In a lab environment with Cisco 2901 routers we came to the conclusion that IPv4 PIM dense-mode required the least amount of time compared to IPv4/IPV6 PIM sparse-mode. Every protocol managed to stay below 20 milliseconds median, which is within the limit of what a human sees as instantaneous

  • 23.
    Axelsson, Lenny
    University West, Department of Economics and IT, Division of Computer Engineering.
    A Concept of an Interactive Controlled Vertical Blind2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    One of the most common devices found worldwide in todays society, is the curtain in

    various designs. Different designs which requires different types of physical efforts to be

    used and adjusted to achieve the intended purpose.

    Due to lack of features in a regular vertical blind and its construction, it makes it hard to

    use and apply with normal behaviours of the human. Where the basic idea is based on a

    static design with a parallel relationship between the individual vertical blinds is the

    prototype based on individual movements of the blinds. A static relationship, which

    requires repeated adjustment through the day and the movement of the sun to achieve the

    desirable functionality. However, when the user gets interrupted and distracted for example

    at work repeatedly during a complete day, his or her performance and creativity at work

    will be reduced.

    In this paper I have chosen to focus on the interaction design of the vertical blind and how

    to improve the interaction relationship between it and the user. Also showing how it is

    possible to create solutions for a simple and common unit like a vertical blind, by means of

    interactive models, use cases, technical predictions and a proposal of a future GUI that

    makes it possible to implement the models in a prototype of an embedded system. 

  • 24.
    Ayers, P. W.
    et al.
    McMaster University, Hamilton, Department of Chemistry.
    Jenkins, Samantha
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    An electron-preceding perspective on the deformation of materials2009In: Journal of Chemical Physics, Vol. 130, no 15, p. 4104-Article in journal (Refereed)
  • 25. Babaheidari, Said Morad
    Evaluating Information Systems by using interpretive evaluation approaches and models2009Book (Other academic)
    Abstract [en]

    As information systems/technologies (IS/IT) become embedded in organizations, these systems cannot be isolated from important issues such as human intellect, culture, philosophy, politics and socio-organizational changes. Limited business resources on one hand and the various concerns and demands from different stakeholders on the other hand have led to an ever-growing need to evaluate IS/IT investments. In other words, due to the heavy rise of IS/IT costs IS/IT investments must be justified. Evaluation of IS/IT investments is generally taken to mean the identification and the measurement of capital expenditures spent on and the initial anticipated revenues gained from the deployments of these systems (IS/IT). One of the main fundamental characteristics of interpretive approach (IA) is to highlight and facilitate evaluation as an interactive learning process. Interpretive approach concentrates on the lifecycle perspective of IS/IT investments argued to be a complex managerial issue. It is crucial to notice that stakeholders, their claims, concerns and issues are at the core of IEA.

  • 26.
    Babaheidari, Said Morad
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Pareto, Lena
    University West, School of Business, Economics and IT, Division of Media and Design.
    Spante, Maria
    University West, School of Business, Economics and IT, Divison of Informatics.
    Svensson, Lars
    University West, School of Business, Economics and IT, Divison of Informatics.
    A Systematic Process for Selecting a Typical Case in School Setting2013In: Proceedings IRIS 36: August 11-14 2013 at Gran, Norway / [ed] Bratteteig, Tone, Aanestad, Margunn & Skorve, Espen, Oslo: University of Oslo , 2013, p. 461-472Conference paper (Refereed)
    Abstract [en]

    This paper describes the rationale behind the concrete steps how we systematically have gone through the case selection process as the first phase of a research project named Consequences of the Digitalization of Schools. The project is a single-case longitudinal (5-year long) study and adopts a so called Whole-School Approach. Previous research has criticized case studies for lack of both systematic approach and transparency in the presentation of the case selection process. The purpose of the presentation of this case selection process is to contribute to enhancing understanding of and broadening knowledge on systematic and transparent case selection techniques. The SIRIS database has been used to select a typical Swedish primary school in the chosen municipality where the project will be conducted. The SIRIS database contains annually statistics from all primary schools in Sweden, and is available online for public use. We demonstrate how and why a particular school representing a so called typical school was selected as our case. 

  • 27.
    Babaheidari, Said Morad
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Svensson, Lars
    University West, School of Business, Economics and IT, Divison of Informatics.
    Managing the Digitalization of Schools: an explorative study of school principals’ and IT-managers’ perceptions2014Conference paper (Other academic)
    Abstract [en]

    The deployment of ICT in school setting is in many ways a complex managerial task that involves several stakeholder groups. Firstly, principals and deans have to relate to the local, regional, national, and international policies and governing systems. Furthermore, the voices of teachers, students and their parents have to be considered and negotiated. In this paper, we explore how school principals’ and municipal IT-managers’ perceive the usefulness and the potential role that ICT play in the school context. In a pilot study of a single school district in a Swedish municipality, we have interviewed representatives from the municipal board of education, the municipal IT-support for schools, and two principals. By using the Technology Acceptance Model (TAM3) as an analytical lens to understand the two constructs of “Perceived usefulness” and the possible role of ICT, we conclude that the barriers for successful integration of IT into educational practices requires firstly overcoming the lack of coordinated ICT investment strategy and tracking of ICT. This can be done by having a clearly articulated ICT policy distributed to school staff which we argue will positively influence the perceived usefulness as expressed by principals and their governing body. Secondly, inclusion of ICT in all aspects of teachers’ professional school activities will bring change to school activities and processes.

  • 28.
    Bagherbandi, Mohammad
    et al.
    Royal Institute of Technology (KTH),Division of Geodesy and Geoinformatics .
    Eshagh, Mehdi
    Royal Institute of Technology (KTH),Division of Geodesy and Geoinformatics, .
    Crustal thickness recovery using an isostatic model and GOCE data2012In: Earth Planets and Space, ISSN 1343-8832, E-ISSN 1880-5981, Vol. 64, no 11, p. 1053-1057Article in journal (Refereed)
    Abstract [en]

    One of the GOCE satellite mission goals is to study the Earth's interior structure including its crustal thickness. A gravimetric-isostatic Moho model, based on the Vening Meinesz-Moritz (VMM) theory and GOCE gradiometric data, is determined beneath Iran's continental shelf and surrounding seas. The terrestrial gravimetric data of Iran are also used in a nonlinear inversion for a recovering-Moho model applying the VMM model. The newly-computed Moho models are compared with the Moho data taken from CRUST2.0. The root-mean-square (RMS) of differences between the CRUST2.0 Moho model and the recovered model from GOCE and that from the terrestrial gravimetric data are 3.8 km and 4.6 km, respectively.

  • 29.
    Bagherbandi, Mohammad
    et al.
    Royal Institute of Technology (KTH), Division of Geodesy and Geoinformatics.
    Eshagh, Mehdi
    Department of Surveying, Islamic Azad University, Shahr-e-Rey Branch, Tehran, Iran.
    Recovery of Moho's undulations based on the Vening Meinesz-Moritz theory from satellite gravity gradiometry data: A simulation study2012In: Advances in Space Research, ISSN 0273-1177, E-ISSN 1879-1948, Vol. 49, no 6, p. 1097-1111Article in journal (Refereed)
    Abstract [en]

    In the gravimetric approach to determine the Moho depth an isostatic hypothesis can be used. The Vening Meinesz–Moritz isostatic hypothesis is the recent theory for such a purpose. Here, this theory is further developed so that the satellite gravity gradiometry (SGG) data are used for recovering the Moho depth through a nonlinear integral inversion procedure. The kernels of its forward and inverse problems show that the inversion should be done in a larger area by 5° than the desired one to reduce the effect of the spatial truncation error of the integral formula. Our numerical study shows that the effect of this error on the recovered Moho depths can reach 6 km in Persia and it is very significant. The iterative Tikhonov regularization in a combination with either generalized cross validation or quasi-optimal criterion of estimating the regularization parameter seems to be suitable and the solution is semi-convergent up to the third iteration. Also the Moho depth recovered from the simulated SGG data will be more or less the same as that obtained from the terrestrial gravimetric data with a root mean square error of 2 km and they are statistically consistent.

  • 30.
    Bakraqi, Valon
    et al.
    University West, Department of Economics and IT, Divison of Informatics.
    Humed Darir, Yasir
    University West, Department of Economics and IT, Divison of Informatics.
    Användarvänlig interaktion med mobila enheter: En studie av centrala designprinciper för mobila enheter2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The background of this study presents the way that technology for mobile units has developed in a quick pace, which has led to an expansion of smartphone usage. While the smartphone usage has expanded, the websites hasn't followed the same development. The problematic discussion in this area deals with the difficulties of adapting interfaces from a stationary computer to the interface of a smartphone.

    Selected mobile sites from different airlines have been investigated, based on how user-friendly they are. The study aims to investigate the problems that can arise when airline sites are not user-friendly, and illustrate how the various design principles are applied in these selected websites. Previous research regarding this topic shows that it's difficult to adapt a website to a smartphone. The same design principles are required as for the ordinary websites, but they need to be performed in a stricter manner. Moreover, earlier research shows that usability is an important aspect in the design of the site for smartphones.

    A qualitative approach was applied in the study, where the approach to collect materials for the study has applied the method think aloud, and interviews have been conducted in order to gain a deeper understanding. The result of this study shows that the investigated mobile websites suffer of severly insufficient usability in regards to the investigated design principles and the principles of usability. It is crucial to apply design principles for good mobile usability to the areas that are important for the interaction between the website and the user. The website and its functions should adapt, depending on the device the user uses to browse the website. The website should not confuse the user and should always give feedback on the whereabouts of the user on the website.

  • 31.
    Begicevic, Dias
    University West, Department of Economics and IT, Divison of Informatics.
    Vi ses på nätet: en studie om ungdomars sätt att umgås via datorn2015Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    When young people today tend to spend part of their leisure time in front of the computer and communicate via various internet-based communication tools may the question be asked if the communication is different from the communication that takes place in reality, and this in turn influences the ability to communicate in an empathic way with their fellow human beings. The question formulation is about if communication via the internet and in real life is different from each other, how young people look at the interaction via the internet-based communication tools, and how this affects them. The method that has been used is qualitative interviews to get as detailed answer as possible by the respondents.The survey results show that young people differ in their way to be, depending on the form of socializing utilized. The selection of social company form are based on mood, the home's rules, weather and season. Internet-based communication tools are used more as a supplement to physical meetings rather than replacing them, in spite of this there is a skepticism from the parents against Internet communication. It can be concluded that the interaction and communication via the internet is not a substitute for physical interaction with other people, but rather serves as a complement to this. An awareness that the communication over the internet can seem harsher exists and it is not used in physical meetings and that communications over the internet seems to be more intense during a short period of adolescence can also conclude that the interaction with other people in real life is not significantly affected.The work does largely agree with what previous research has shown.

  • 32.
    Berndtsson, Jesper
    et al.
    University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
    By, Mathias
    University West, Department of Engineering Science, Division of Computer, Electrical and Surveying Engineering.
    Cactuz: The modular toolbox for evaluating Intrusion Prevention Systems2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Intrusion prevention systems are a widely used today to protect the local network from threats on the world wide web by blocking unwanted packets, but still be able to forward desirable traffic. Before placing the intrusion prevention system in a live network, the system can be tested with it capabilities in a test environment.

    This paper is about the build of the toolbox "Cactuz", developed with 11 different test sce-narios with the availability to expand. The report contains general information about threats and attacks but also the software and tools included in the build. The result of the build is presented as the toolbox which includes multiple attacks and tests with a user interface. Cac-tuz is evaluated by Snort IPS where the evaluation of each attack is presented and analyzed.

  • 33.
    Bernhard, Irene
    et al.
    University West, Department of Economics and IT, Division of Media Production.
    Blomgren, Roger
    Flensburg, Per
    University West, Department of Economics and IT, Divison of Informatics.
    Grundén, Kerstin
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    En kritisk analys av IT-visioner inom hälsa och kultur2010In: Förvaltning och medborgarskap i förändring: etablerad praxis och kritiska perspektiv / [ed] Lindblad-Gidlund, Katarina, Ekelin, Annelie, Eriksén, Sara, Ranerup, Agneta, Lund: Studentlitteratur, 2010, 1, p. 251-270Chapter in book (Other academic)
  • 34.
    Bernhard, Irene
    et al.
    University West, Department of Economics and IT, Division of Media Production.
    Grundén, Kerstin
    University West, Department of Economics and Informatics, Divison of Informatics.
    Kompetensstrategier vid införande av kundcenter i kommuner2010In: Lärande i och för det nya arbetslivet / [ed] Lagrosen, Stefan, Lundh-Snis Ulrika, Nehls, Eddy, Lund: Studentlitteratur, 2010, 1, p. 31-46Chapter in book (Other academic)
  • 35.
    Bernhardsson, Lennarth
    et al.
    University West, Department of Economics and IT, Division of Media and Design.
    Pineda, Maria Victoria
    Information Technology Department, College of Computer Studies.
    The Great Learning Experience: An attempt to understand learning from the wies of the millenial learners.2011In: Connecting Communities: The A B C D of eLearning, Palawan, 2011, p. 1-5Conference paper (Other academic)
    Abstract [en]

    Millenial learners are individuals born after 1985 with very wide exposure to various types of media enhanced by technology. They are persons who had listened to music while in the wombof their mothers and had watched television starting at age 0. Most of them would have hada music player or a game pad or a mobile phone at age 8. (Deterle, Dede and Schrier, 2008)These millenial learners grew up with constant web connectivity at their fingertips to assist themin their homeworks.

    The present pedagogies our academic institutions employ to support the learning style ofthe web generation of students may not be as suitable. Social constructivism, transformativelearning or problem-based learning, while prevalent in the Asian context, may be more perfectfor cognitively dynamic students. Our students nowadays are more adept to constructingknowledge, content (Attwell, 2007) and even more independent in their learning priorities.This study attempts to understand the new learning practices among our students. This studyattempts to find out how college students define what a good learning experience is. It is alsothe intention of the study to explore new educational practices and hopefully drive ways ofdesigning and developing the future of learning activities.

    The study was conceived in May 2011 and was planned to collect data in the form of shortvideos in a span of six months, from June to December. There will be two sets of samples, onefrom the students of De La Salle University of the Philippines (DLSU) and the other from thestudents of University West (UW) in Sweden.

    The experiment asked for a two minute video that will be created and expressed by anindividual or group of students. This meant planning and organization to compose the thoughts,the message and the content of the video. Since this contains the expression of the studentsthemselves, the self-expression equates to a great degree of authenticity.

    This paper will impart the work-in-progress of this experiment, the Great Learning Experience.To date, there are twenty videos from DLSU and fifteen videos from UW. This paper will tell themethods used in the different classes and the initial findings. Comparison of the UW and DLSUvideos is not included in the paper.

  • 36.
    Björkholdt, Elise
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Lundström, Patrik
    University West, Department of Technology, Mathematics and Computer Science.
    Generalizations of the normal basis theorem2004In: Mathematica Scandinavica, ISSN 0025-5521, E-ISSN 1903-1807, Vol. 94, p. 5p. 185-190Article in journal (Refereed)
  • 37.
    Björkman, Inger
    et al.
    University West, Department of Technology, Mathematics and Computer Science.
    Johansson, Ann
    University West, Department of Economics and Informatics.
    Implications of IT in Different Professions2006In: Information Technology: New Generations, 2006. ITNG 2006. Third International Conference on10-12 April 2006, 2006, p. 11-19Conference paper (Other academic)
    Abstract [en]

    Development of information systems and IT are continuously ongoing in almost every company and organisation. More and more IT development is performed in organisations characterised by professional work. Two studies are performed to point out two types of professions. One study is carried out at an airbase within the Swedish Air Force and one study is done in a health care organisation in Sweden. The aim of this paper is to describe and analyse the different types of professional work in these organisations. Some implications of the use of IT in different types of professional work are addressed

  • 38.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Performance Prediction of Future Generation Computer Systems2006In: Proceedings of the International Conference on Applied Computing: San Sebastian, Spain, Feb 25-28, 2006, p. 42-48Conference paper (Other academic)
  • 39.
    Boklund, Andreas
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Wombat lurar nätskurkarna2006In: Datormagazin, ISSN 1650-1306, no 10, p. 86-90Article in journal (Other (popular science, discussion, etc.))
  • 40.
    Boklund, Andreas
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Christiernin, Stefan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Skriv en bandbreddsmätare i C2007In: Datormagazin, ISSN 1650-1306, no 7, p. 113-117Article in journal (Other (popular science, discussion, etc.))
  • 41.
    Boklund, Andreas
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Christiernin, Stefan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Johansson, Christer
    Lindell, Håkan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    A Comprative Study of Forward and Reverse Engineering in UML Tools2007In: Proceedings of the International Conference on Applied Computing: Salamanca 2007, Spain, IADIS , 2007, p. 535-540Conference paper (Refereed)
    Abstract [en]

    In the process of developing computer based applications the use of descriptive models to depict the architecture and design of the application is practical and brings many advantages. The most commonly used standard today is the Unified Modeling Language. There are many tools that implemented support for this standard for modeling, and they vary in functionality. A comparative study, including a selection of these tools, will show advantages and disadvantages for each tool. The purpose of this study is to test a selection of these modeling tools for a typical three-tier layered web service application. The tools tested in this study are Microsoft Visual Studio 2005 .NET Beta, PowerDesigner and Visual Paradigm. Rational Rose would have been included if it would have supported C#. In this study tests are performed in regard to modeling a class diagram, forward engineering to source code from the class diagram and reverse engineering from source code to class diagram. Despite the shortage of diagram types MS Visual Studio proved to be the most reliable tool for this particular type of applications.

  • 42.
    Boklund, Andreas
    et al.
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Jiresjö, Christian
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    Mankefors, Stefan
    University West, Department of Technology, Mathematics and Computer Science, Division for Computer Science.
    The Story Behind Midnight, a Part Time High Performance Cluster2003In: International conference on Parallel and Distributed Processing Techniques and Applications / [ed] Hamid R. Arabnia, Las Vegas: CSREA Press , 2003, p. 173-178Conference paper (Other academic)
    Abstract [en]

    In this paper, we present the creation process andthe purpose behind the Midnight cluster. It isdisguised as a computer laboratory during the day,but turns into a high performance compute clusterduring the night.The main focus of this paper is on the basic issueswith creating a part time compute cluster. TheMidnight cluster was constructed to serve both as aCPU harvester and as a platform for further studies.The main goal of our upcoming research is toev aluate different methods for handling shapechangeand process management on the cluster, andhow these factors affect running processes, stabilityand performance.

  • 43.
    Boklund, Andreas
    et al.
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Namaki, Nima
    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.
    Gustafsson, J
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Lingbrand, M
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Dual-core efficiency for engineering simulation applications2008In: 2008 International Conference on Parallel and Distributed Processing Techniques and Applications, PDPTA 2008: Las Vegas, NV; 14 July 2008 through 17 July 2008, 2008, p. 962-968Conference paper (Refereed)
  • 44.
    Borjesson, Anna
    et al.
    Ericsson, Goteborg.
    Pareto, Lars
    IT University of Goteborg.
    Lundh Snis, Ulrika
    University West, School of Business, Economics and IT, Division of Computer Science and Informatics.
    Staron, Miroslaw
    IT University of Goteborg.
    Continuing professional development by practitioner integrated learning2007In: Companion to the 22nd ACM SIGPLAN conference on Object-oriented programming systems and applications companion: Conference on Object Oriented Programming Systems Languages and Applications, ACM , 2007, p. 897-907Conference paper (Other academic)
  • 45.
    Boström, Malin
    et al.
    University West, School of Business, Economics and IT, Divison of Informatics.
    Staciwa, Monika
    University West, School of Business, Economics and IT, Divison of Informatics.
    Digital Nudging för hållbarhet: En experimentell studie om digital nudging för hållbarhet2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study examines how digital user interface systems with digital nudges shaped based on FBM (Fogg Behavior Model) and the PSD model (Persuasive Systems Design) can be used for the promotion of sustainable consumption patterns.

    The study's data collection methods are experimental user tests in a semi-controlled environment where user data on a mobile-based user interface design is collected for analysis. The user interface tested was of a prototype mobile app, made for the purpose of this study. Complementary interviews of the participants were performed in connection with the tests in order to gain a deeper understanding of the design situation and the factors that may have an impact on the users' choice, their experiences and attitudes, among other things.

    The results of the experiment in which various digital nudges are tested are interpreted and analyzed from a persuasive design perspective using the FBM and PSD models that conceptualize persuasive design. The intention is to see which factors lead users to more sustainable consumption behaviors.

    We conclude with a discussion on how to apply these models in order to design nudges in context for sustainability purposes. The discussion is intended to lead to an inductive conclusion about which variables and which conditions work best to lead users to more environmentally friendly alternatives using nudges.

  • 46.
    Bramfors, Emanuel P
    University West, Department of Economics and IT, Divison of Informatics.
    Distansmöten i verksamheten: En fallstudie av distansmöten i Fyrbodals kommunalförbund2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of the essay is to investigate what experiences and views officials and management, within a public organization such as Fyrbodals Kommunalförbund, have regarding distance meetings. Another purpose of the study is to account for what factors the respondents consider important in order to improve the quality and efficiency of distance meetings. In this essay meeting culture, meeting tools and meeting management within Fyrbodals kommunalförbund are focused. I choose to do the research in this particular organization due to earlier experiences in it, which have motivated me to study it further.

    Case study, with the emphasis of qualitative studies, has been used as research method. I have had a qualitative approach in my essay, with aspects such as usability regarding technique and individuals' experiences and views of distance meetings as a main focus. The different methods used in this case study were semi structured interviews, studies of documents and literary studies. By partly using a few selected parameters of Unified Theory of Acceptance and Use of Technology, (UTAUT), usability regarding technique could be analyzed in an efficient manner. UTAUT is a theory based on eight other models for user acceptance of new technique. In my interviews, I was able to identify several issues, within the frame of usability. By using UTAUT, patterns and formations could be discerned. The results of the study show that distance meetings overall is something positive, due to the fact that they do not include travelling, can save money and because the distance meetings are efficient. The most important findings that affect efficiency as well as quality when using distance meetings were a clear, predetermined structure of the meeting using a trained chairman to lead them, and repetitive training of the communication tools.

  • 47.
    Broberg, Erik
    et al.
    University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering.
    Johansson, Robin
    University West, Department of Engineering Science, Divison of Natural Sciences, Surveying and Mechanical Engineering.
    Analys av fri stationsuppställning med totalstation med avseende på mätta längder och riktningar2014Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Station setup involves determination of the measuring instruments physical location and orientation. In today's construction industry free station is almost exclusively used to establish a station point for measurements. On a construction site, access to reference objects is often limited. The instruments placement therefore becomes a compromise between access to the reference objects and access to the site where surveying will take place. This compromise results in varying geometric configurations of the reference objects, which affect the results of the survey.

    This study aims to investigate whether the simulations of free station setups in Svensk Byggnadsgeodesis ( SBG's ) software Geo is verified by field measurements and subsequent calculations of uncertainty parameters caused by configuration and surveyed distances and directions. One objective of this study was to establish a test network of reference objects, which simulation and field measurement of free station were established against. The analysis of free station setup included only simulation and field measurement of plane surveying, with the parameters X, Y and direction.

    In all configurations, the simulations were verified by the field measurements by consistent corresponding of the shape of the error ellipses. This means that by simulation of SBG Geo, weaknesses in configurations can be detected and avoided during field survey, which saves both time and resources. Factors to consider when establishing free station is, according to the study: configuration, quality of the measurements and sufficient controllability (K-tal).

    The study concludes; simulate more. Simulation in SBG Geo show good representation of field measurements and is therefore an effective planning tool for field surveying. When establishing free station reference objects should be positioned so that the station point is interpolated for the lowest uncertainty

  • 48.
    Broberg, Patrik
    University West, Department of Engineering Science, Division of Process and Product Development.
    Towards Automation of Non-Destructive Testing of Welds2011Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    All welding processes can give rise to defects that will weaken the joint and can lead to failure of the welded structure. Because of this, non-destructive testing (NDT) of welds have become increasingly important to ensure the structural integrity when the material becomes thinner and stronger and welds become smaller; all to reduce weight in order to save material and reduce emissions due to lighter constructions.

    Several NDT methods exists for testing welds and they all have their advantages and disadvantages when it comes to the types and sizes of defects that are detectable, but also in the ability to automate the method. Several methods were compared using common weld defects to determine which method or methods were best suited for automated NDT of welds. The methods compared were radiography, phased array ultrasound, eddy current, thermography and shearography. Phased array ultrasound was deemed most suitable for detecting the weld defects used in the comparison and for automation and was therefore chosen to be used in the continuation of this work. Thermography was shown to be useful for detecting surface defects; something not easily detected using ultrasound. A combination of these techniques will be able to find most weld defects of interest.

    Automation of NDT can be split into two separate areas; mechanisation of the testing and automation of the analysis, both presenting their own difficulties. The problem of mechanising the testing has been solved for simple geometries but for more general welds it will require a more advance system using an industrial robot or similar. Automation of the analysis of phased array ultrasound data consists of detection, sizing, positioning and classification of defects. There are several problems to solve before a completely automatic analysis can be made, including positioning of the data, improving signal quality, segmenting the images and classifying the defects. As a step on the way towards positioning of the data, and thereby easing the analysis, the phase of the signal was studied. It was shown that the phase can be used for finding corners in the image and will also improve the ability to position the corner as compared to using the amplitude of the signal. Further work will have to be done to improve the signal in order to reliably analyse the data automatically.

  • 49.
    Bäck, Pernilla
    et al.
    University West, Department of Economics and IT, Division of Media and Design.
    Sidhu Koskela, Niklas
    University West, Department of Economics and IT, Division of Media and Design.
    En mobil stads-applikation i Trollhättans utveckling mot en smartare stad2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This paper maps out the possibility to create and implement a mobile application based on a project brief from mCity, that will help Trollhättan in becoming a smarter city. The reader gains a deeper understanding of how, with the help of data collection and analysis can infer patterns and based on that, create an interface as well as content that meets project objectives and contribute to the development from a Smart City perspective.We have, by interviewing local government employees and citizens, created a prototype built upon approved methods in usability that meets the above criteria which has also been tested on further citizens to evaluate the usability and user experience.Using this mapping, we believe that the future development and implementation of this and/or a similar type of application has been facilitated and the reconciliations made, indicate that such an implementation would also be of Trollhättan's advantage in its quest to become a smarter city

  • 50.
    Bäckman, Kjell
    University West, Department of Economics and IT, Division of Computer Science and Informatics.
    Ant Colony Optimization and Evolutionary Algorithms Applied to Jazz Solo Improvisation2010Conference proceedings (editor) (Other academic)
    Abstract [en]

     

    This paper describes an experiment of using a variant of the TSP (Traveling Salesman Problem) of ACO (Ant Colony Optimization) and automatic fitness in the evolutionary algorithm to create jazz improvisation solos. It is a sub-project of our overall EJI (Evolutionary Jazz Improvisation) project, where we try to explore the inner nature of jazz music and model jazz improvisation solos and jazz harmony in the computer by means of evolutionary algorithms, swarm theory, chaos theory, neural networks, memetics and other kinds of heuristics

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