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  • 351.
    Badampudi, Deepika
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Wohlin, Claes
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Gorschek, Tony
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    An Evaluation of Knowledge Translation in Software Engineering2019In: International Symposium on Empirical Software Engineering and Measurement, IEEE Computer Society , 2019Conference paper (Refereed)
    Abstract [en]

    Knowledge translation is defined, in health sciences, as 'the exchange, synthesis and ethically sound application of research results in practice'. The objective of this paper is to implement and conduct a feasibility evaluation of a knowledge translation framework in software engineering. We evaluated the outcome of the knowledge translation framework in an industrial setting, along with the effectiveness of the interventions undertaken as part of knowledge translation in a multi-case study. The results of the evaluation suggest that the practitioners perceive the knowledge translation framework to be valuable and useful. In conclusion, this paper contributes towards the reporting of a systematic implementation of knowledge translation and evaluating its use in software engineering. © 2019 IEEE.

  • 352.
    Badampudi, Deepika
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Wohlin, Claes
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Gorschek, Tony
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Contextualizing research evidence through knowledge translation in software engineering2019In: PROCEEDINGS OF EASE 2019 - EVALUATION AND ASSESSMENT IN SOFTWARE ENGINEERING, Association for Computing Machinery , 2019, p. 306-311Conference paper (Refereed)
    Abstract [en]

    Usage of software engineering research in industrial practice is a well-known challenge. Synthesis of knowledge from multiple research studies is needed to provide evidence-based decision-support for industry. The objective of this paper is to present a vision of how a knowledge translation framework may look like in software engineering research, in particular how to translate research evidence into practice by combining contextualized expert opinions with research evidence. We adopted the framework of knowledge translation from health care research, adapted and combined it with a Bayesian synthesis method. The framework provided in this paper includes a description of each step of knowledge translation in software engineering. Knowledge translation using Bayesian synthesis intends to provide a systematic approach towards contextualized, collaborative and consensus-driven application of research results. In conclusion, this paper contributes towards the application of knowledge translation in software engineering through the presented framework. © 2019 Association for Computing Machinery.

  • 353.
    Badampudi, Deepika
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Wohlin, Claes
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Gorschek, Tony
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Guidelines for Knowledge Translation in Software EngineeringIn: Article in journal (Refereed)
  • 354.
    Badampudi, Deepika
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Wohlin, Claes
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Petersen, Kai
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Experiences from Using Snowballing and Database Searches in Systematic Literature Studies2015Conference paper (Refereed)
    Abstract [en]

    Background: Systematic literature studies are commonly used in software engineering. There are two main ways of conducting the searches for these type of studies; they are snowballing and database searches. In snowballing, the reference list (backward snowballing - BSB) and citations (forward snowballing - FSB) of relevant papers are reviewed to identify new papers whereas in a database search, different databases are searched using predefined search strings to identify new papers. Objective: Snowballing has not been in use as extensively as database search. Hence it is important to evaluate its efficiency and reliability when being used as a search strategy in literature studies. Moreover, it is important to compare it to database searches. Method: In this paper, we applied snowballing in a literature study, and reflected on the outcome. We also compared database search with backward and forward snowballing. Database search and snowballing were conducted independently by different researchers. The searches of our literature study were compared with respect to the efficiency and reliability of the findings. Results: Out of the total number of papers found, snowballing identified 83% of the papers in comparison to 46% of the papers for the database search. Snowballing failed to identify a few relevant papers, which potentially could have been addressed by identifying a more comprehensive start set. Conclusion: The efficiency of snowballing is comparable to database search. It can potentially be more reliable than a database search however, the reliability is highly dependent on the creation of a suitable start set.

  • 355.
    Bagnato, Alessandra
    et al.
    SOFTEAM, FRA.
    Fucci, Davide
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    European Project Space Papers for the PROFES 2019: Summary2019In: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) / [ed] Franch X.,Mannisto T.,Martinez-Fernandez S., Springer , 2019, Vol. 11915, p. 573-576Conference paper (Refereed)
    Abstract [en]

    The European Project Space at PROFES 2019 provides an opportunity for researchers involved in ongoing and recently completed research projects (national, European, and international) related to the topics of the conference to present their projects and disseminate the objectives, deliverables, or outcome. © Springer Nature Switzerland AG 2019.

  • 356.
    Bahrieh, Sara
    Blekinge Institute of Technology, School of Engineering.
    Sensor Central / Automotive Systems2013Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    How to display objects which were detected from different devices in one coordinate system? Nowadays most vehicles are equipped with front and back sensors to help the driver in driving process. Companies who provide this technology need to have an application which enables them for easy data fusion from these sensors and recording the process. Besides sensor’s design, programming of them is an important aspect. BASELABS Connect has the solution in a user friendly way. Creating Sensor Central component for BASELABS Connect is the main goal of this thesis. Sensor Central from BASELABS Connect requires six variables of sensor’s position for each sensor to demonstrate the objects from all sensors to one unique coordinate system. In this thesis, it was intended to create such a component which was mounted between all the sensors and the charting component to convert the objects location from different sensor’s position to one coordinate system and to be usable from other vehicles too.

  • 357. Bai, Guohua
    A Sociocybernetic Model of Sustainable Social Systems2009Conference paper (Refereed)
    Abstract [en]

    The ongoing economic crisis world around has asked for a theoretical understanding and deep analysis of what have been wrong in our economic system in specific and social system as whole. Discussions in many forums and mass media have mostly focused on a level of first order casual-effects such as bank and credit system in relation to house loans and car industries, and where and how much the stimulating packages should be distributed, etc. This is what I called a liveability level problem. A second order understanding of fundamental systems structure and social subsystems relationships however, have not been much addressed properly. This is what I called the sustainability problem. This paper will propose an epistemological model based on cybernetic feedback principle and the Activity Theory to interpret the second order problems that deeply embed in our social-economic system structure. So the liveability and sustainability are coherently discussed within a socio-cybernetic system. The first part of the paper introduces shortly principles of feedbacks from cybernetics, especially understanding the behaviours of positive and negative feedbacks. Then, the Activity Theory and related concepts from social autopoietic theory are introduced. The aim of introducing those concepts is to provide the basic elements/components to the construction of a double-loops feedback model in the second part. In the last, the current economic crisis is interpreted based on the constructed model, to verify the usability of the proposed model.

  • 358.
    Bai, Guohua
    Blekinge Institute of Technology, School of Computing.
    A Sustainable Platform for E-services System Design2004In: Journal of Systems Science and Systems Engineering, ISSN 1004-3756, E-ISSN 1861-9576, Vol. 13, no No.4Article in journal (Refereed)
    Abstract [en]

    By integrating system thinking and social psychology, this paper presents an Activity System Theory (AST) approach to the platform design of e-service systems in general, and e-healthcare systems in specific. In the first part, some important principles of AST and a sustainable model of human activity system are introduced. Then a project ‘Integrated Mobile Information System for Healthcare (IMIS)’ is presented to demonstrate how to construct a comprehensive platform for various complex e-service systems based on the sustainable model of AST. Our research focused on the complex e-healthcare system in Sweden, and the results showed that the model of AST can provide the designers of e-service system with a comprehensive and sustainable platform for designing various kinds of e-service system

  • 359.
    Bai, Guohua
    Blekinge Institute of Technology, School of Computing.
    Activity System Theory Approach to Healthcare Information System2004Conference paper (Refereed)
    Abstract [en]

    Healthcare information system is a very complex system and has to be approached from systematic perspectives. This paper presents an Activity System Theory (ATS) approach by integrating system thinking and social psychology. First part of the paper, the activity system theory is presented, especially a recursive model of human activity system is introduced. A project ‘Integrated Mobile Information System for Diabetic Healthcare (IMIS)’ is then used to demonstrate a practical application of the Activity System Theory especially in constructing healthcare information system. Our conclusion is that the activity system model can provide the service system designers with a comprehensive and integrated framework for designing healthcare information system in specific, and for designing various kinds of service systems in general.

  • 360. Bai, Guohua
    Activity Theory as a Framework for CSCW Software Architecture Design.2002In: Activity Theory and Sociocultural Research. / [ed] Nissen, M; Westerberg, K, 2002Chapter in book (Other academic)
  • 361. Bai, Guohua
    An Epistemological Model of Social Activities: Sociocybernetics2003Conference paper (Refereed)
  • 362.
    Bai, Guohua
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    An Organic View of Prototyping in Information System Development2014In: 2014 IEEE 17th International Conference on Computational Science and Engineering (CSE) / [ed] Liu, X; ElBaz, D; Hsu, CH; Kang, K; Chen, W, ChengDu: IEEE, 2014, Vol. Article number 07023844, p. 1814-1818Conference paper (Refereed)
    Abstract [en]

    This paper presents an organic view of prototyping for managing dynamic factors involved in evolutionary design of information systems (IS). Those dynamic factors can be caused by, for example, continuing suggestions from users, changes in the technologies, and users-designers learning related stepwise progresses. Expanding the evolutionary prototyping to ‘start small and grow’, the organic view of prototyping proposes two prerequisites to do so, namely 1) a sustainable and adaptive ‘embryo’ – an organic structure of the future system, and 2) an embedded learning and feedback management that the actors of the system (users, designers, decision makers, administrators) can communicate with each other. An example of eHealth system design demonstrates how the prerequisites can be implemented.

  • 363. Bai, Guohua
    e-Health – Challenges and Approaches2010Conference paper (Refereed)
    Abstract [en]

    Abstract: e-Health has been one of the most expected IT (information technology) applications just like e-Business, e-Learning, e-Government, and e-Democracy. However, e-Health has not reached the expected scale of use IT. There are challenges especially involved in healthcare sectors that are so different from other sectors. I will stress those challenges and suggest some approaches to meet the challenges from my past 10 years experience as a researcher in this area. I hope this will provide with researchers, entrepreneurs, and practitioners some hints when e-Health is the target area.

  • 364.
    Bai, Guohua
    Blekinge Institute of Technology, School of Computing.
    E-hälsa: Utmaningen och Möjligheter2006Conference paper (Other academic)
    Abstract [en]

    As the organiser of the workshop 'IT-stöd för vård och omsorg i hemmet', the author presents a general picture of the subject, and call for one day's discussion with around 30 participants from all around Sweden.

  • 365. Bai, Guohua
    Feedback Principle for Studies of Social Activities2003Conference paper (Refereed)
  • 366. Bai, Guohua
    Globalization Through Feedback of Social Activities2003Conference paper (Refereed)
  • 367.
    Bai, Guohua
    Blekinge Institute of Technology, School of Computing.
    ICT PROJECTS: Case Study Reports2006Report (Other academic)
    Abstract [en]

    The case study of OVK (Seamless healthcare chain supported by ICT (Obruten vårdkedja med IT –stöd) describes some basic key factors for sucessful eHealth project, and is documented in the projects database in IANIS+

  • 368. Bai, Guohua
    Integrated Mobile Information System (IMIS) for Healthcare Work.2002Conference paper (Refereed)
  • 369. Bai, Guohua
    Integrerade Nätverk i Hemsjukvården För Personer Med Diabetes (IMIS)2005Conference paper (Refereed)
    Abstract [en]

    The presentation is a IMIS project report to VINNOVA's programkonferens IT i Hemsjukvård.

  • 370. Bai, Guohua
    Integrerade nätverk i hemsjukvården för personer med diabetes (IMIS)2007Report (Other academic)
    Abstract [sv]

    IT för sjukvård i hemmet är ett program inom VINNOVAs enhet Tjänster och IT användning.

  • 371.
    Bai, Guohua
    et al.
    Blekinge Institute of Technology, School of Computing.
    Guo, Yang
    Blekinge Institute of Technology, School of Computing.
    A General Architecture For Developing A Sustainable Elderly Care e-Health System2011Conference paper (Refereed)
    Abstract [en]

    Based on some identified problems and challenges to the current healthcare system, this paper proposes architecture for developing e-health system to meet the challenges and resolve some problems. The architecture is based on a solid theoretical model of human activity, and it has properties such as sustainability, generality, and expandability. We demonstrate the properties of the architecture through an ongoing research project. We concluded that this architecture can be widely used to integrate various small scale applications of e-health systems and to resolve some current design problems such as interoperability and knowledge sharing.

  • 372. Bai, Guohua
    et al.
    Guo, Yang
    Activity Theory Ontology for Knowledge Sharing in E-health2010Conference paper (Refereed)
    Abstract [en]

    Knowledge sharing has become an imperative and challenging issue in the E-health field for improving total quality of services. However, since the E-health subject is a multi-disciplinary and cross-organizational area, to have shared concepts, vocabulary plus a specification of its intended meaning, namely an ontology, has been an obstacle to develop e-health system. We will in this paper propose a knowledge sharing ontology on the basis of Activity Theory. We believe that Activity Theory can provide high level and rich ontology for the developers of E-health system to encompass the multi-disciplinary and cross-organizational knowledge. We validate our approach in the end by demonstrating our project IMIS (Integrated Mobile Information System for Healthcare) that uses the activity theory as ontological architecture for the construction of the whole system.

  • 373. Bai, Guohua
    et al.
    Malmqvist, Gustav
    Guide to REgional Good Practice eHealth2007Report (Other academic)
    Abstract [en]

    This report shows the result of the work of IANIS+ eHealth work group (WG). The WG has collected regional eHealth experiences from around Europe through a number of activities: • Regional eHealth case studies of which 17 (from 15 regions) are shown in this report • Four joint meetings of the group of which one was a policy seminar with invited guests from the EU Commission, relevant organisations in the field of eHealth and regional authorities • A meeting with the European Commission DG Information Society & Media, Unit H1 eHealth • Collaboration with the eHealth network within the organisation Assembly of European Regions (AER) • Attendance in recent major eHealth conferences: · Personal Health Systems arranged by the European Commission when launching the eHealth part of the 7th Framework Programme, 11-12 February 2007 · The EU-US eHealth Policy Workshop, 10 May 2007 · The final conference of the INTERREG IIIB project Baltic eHealth, 21-22 May 2007 • eHealth seminars at IANIS+ annual conferences in Blekinge 2006 and Bilbao 2007 The innovation perspective of eHealth in the regions has been the focus for the IANIS+ eHealth WG. Regional diversity regarding strategies, policies, and action plans for eHealth can act as a driving factor for successful eHealth projects, but leads also to challenges for interoperability, standardisation, integrity and security. It is important to learn from others. It may be about how to choose the right technology or what methods to use for implementation. Depending on what area of eHealth, there are numerous projects and up-and-running services from which we can learn. Not to forget there are also many experiences from unsuccessful trials. Even if an eHealth solution has failed in one setting, it can be a success under different circumstances. The aim of the IANIS+ eHealth Working Group was to share experience between regions belonging to the network, and bring up some issues of good practice for regional eHealth implementation. Projects brought up in the IANIS+ working group are projects in there own rights, with pros and cons. The projects cover different perspectives and types of eHealth. Some were difficult to evaluate while others are valuable comparable experiences from different settings and circumstances. In any case, we can learn something from all the cases as examples from reality and as a complement to formal evaluations and scientific studies of eHealth. We would rather use the term good practice than best practice. There is always something good to learn from others while there is hardly any best practice that works under every circumstance.

  • 374. Bai, Guohua
    et al.
    Zhang, Peng
    Developing a Semantic Web Services for Interoperability2005Conference paper (Refereed)
    Abstract [en]

    This paper deals with the design problems in healthcare information systems on how to adapt to dynamic factors and diversities so as to reach the interoperability between healthcare actors. Those dynamic factors and diversities are caused by, for example, constant suggestions from users, changes in the applied technologies, and after-learning related stepwise progresses. We suggest applying Web services technology, especially the idea of Semantic Web to tackle the problem of diversity in healthcare branch. In order to tackle the problem of dynamic changes during the design process, we suggest an evolutionary design methodology based upon an organic development metaphor – embryonic prototyping approach (EmA). We demonstrate our idea by the project IMIS that is to design a semantic Web service for the diabetic healthcare.

  • 375. Bai, Guohua
    et al.
    Zhang, Peng
    Functions For eHealth Communication Systems Design2009Report (Other academic)
    Abstract [en]

    The design of eHealth systems calls for a clear needs analysis and functions based on the users’ perspective. However, this is often the most difficult part of designing eHealth service systems, because of the diversity of users and diversified needs. This paper provides a general mapping and overview of the basic functions of eHealth systems identified through two studies: (1) a comprehensive study of the resource book of eHealth projects under the European Sixth Framework programme (FP6), and (2) a theoretical study based on the framework of Activity Theory. The first study provides the eHealth system designers with an overview of a number of important and particular functions that the users/citizens need in order to get good services; while the second study presents a fundamental ‘skeleton’ and architecture for providing those particular functions in an orderly and coherent system.

  • 376.
    Bai, Xuefeng
    Blekinge Institute of Technology, School of Engineering.
    Product Development starts from Crowdsourcing2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    A practice of applying of Product Service System (PSS)—Xinmade.com is demonstrated by a business plan and this paper discusses about using Crowdsourcing in the traditional New Product Development (NPD). Finally tips of applying Crowdsourcing in PSS are summarized.

  • 377.
    BAIG, CLEMENT RANJITH ANTHIKKAD & IRFAN AHMED
    Blekinge Institute of Technology, School of Engineering.
    PERFORMANCE ENHANCEMENT OF OFDM IN PAPR REDUCTION USING NEW COMPANDING TRANSFORM AND ADAPTIVE AC EXTENSION ALGORITHM FOR NEXT GENERATION NETWORKSPERFORMANCE ENHANCEMENT OF OFDM IN PAPR REDUCTION USING NEW COMPANDING TRANSFORM AND ADAPTIVE AC EXTENSION ALGORITHM FOR NEXT GENERATION NETWORKS2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This paper presents a new hybrid PAPR reduction technique for the OFDM signal, which combines a multiple symbol representations method with a signal clipping method. The clipping method is a nonlinear PAPR reduction scheme, where the amplitude of the signal is limited to a given threshold. Considering the fact that the signal must be interpolated before A/D conversion, a variety of clipping methods has been proposed. Some methods suggest the clipping before interpolation, having the disadvantage of the peaks re-growth. Other methods contributed that the clipping after interpolation, having the disadvantage of out-of-band power production. In order to overcome this problem different filtering techniques have been proposed. Filtering can also cause peak re-growth, but less than the clipping before interpolation. Another clipping technique supposes that only subcarriers having the highest phase difference between the original signal and its clipped variant will be changed. This is the case of the partial clipping method. To further reduce the PAPR, the dynamic of the clipped signal can be compressed. Linear methods like partial transmit sequence or selective mapping has been proposed for the reduction of PAPR as well. Another PAPR reduction method is the tone reservation. It uses tones on which no data is sent to reduce the transmitted signal peaks. Derivatives of this method with lower computation complexity and improved performance have been proposed: One-Tone One-Peak and one by-one iteration. A similar PAPR reduction method is the multiple symbol representations, where alternative signalling points are used to represent one symbol. The simulation results highlight the advantages of the proposed PAPR reduction method.

  • 378.
    Baig, Imran
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Measuring Cohesion and Coupling of Object-Oriented Systems Derivation and Mutual Study of Cohesion and Coupling2004Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Cohesion and coupling are considered amongst the most important properties to evaluate the quality of a design. In the context of OO software development, cohesion means relatedness of the public functionality of a class whereas coupling stands for the degree of dependence of a class on other classes in OO system. In this thesis, a new metric has been proposed that measures the class cohesion on the basis of relative relatedness of the public methods to the overall public functionality of a class. The proposed metric for class cohesion uses a new concept of subset tree to determine relative relatedness of the public methods to the overall public functionality of a class. A set of metrics has been proposed for measuring class coupling based on three types of UML relationships, namely association, inheritance and dependency. The reasonable metrics to measure cohesion and coupling are supposed to share the same set of input data. Sharing of input data by the metrics encourages the idea for the existence of mutual relationships between them. Based on potential relationships research questions have been formed. An attempt is made to find answers of these questions with the help of an experiment on OO system FileZilla. Mutual relationships between class cohesion and class coupling have been analyzed statistically while considering OO metrics for size and reuse. Relationships among the pairs of metrics have been discussed and results are drawn in accordance with observed correlation coefficients. A study on Software evolution with the help of class cohesion and class coupling metrics has also been performed and observed trends have been analyzed.

  • 379.
    Baig, Mirza Hamid
    et al.
    Blekinge Institute of Technology, School of Computing.
    Kiani, Hassan Shahzad
    Blekinge Institute of Technology, School of Computing.
    Performance Evaluation of MANET using MPLS2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Mobile Ad Hoc Network (MANET) is special kind of wireless network which does not have any fixed structure. They are paired for specific purpose within some concise time period. As the concept of “Micro Products” with a feature of “Mobility” has gain popularity, the MANET has benefited the mankind in many ways and in number of situations such as Natural Disaster, War Zone, and Medical Camp in far-flung Earthquake hit areas etc. In every situation mobile nodes organized themselves on temporary bases in network topology. Autonomous nodes having wireless infrastructure are interconnected to form an autonomous network and easily establish a connection from one place to another. These mobile nodes act either as routers or as a host. These nodes have routing capabilities for multi hop paths through which these are interconnected. The mobility of nodes needs efficient routing for MANET. So therewith, Multi Protocol Label Switching (MPLS) enhances routing with respect to path and packet forwarding. In our thesis we try to analyze the various effects of MPLS on MANET protocols when integrated with MPLS. Simulations were carried out using OPNET modeler 14.5 for analyzing the MPLS effects on the metrics like route discovery time, packet end-to-end delay and throughput. Moreover case study is also included to present a conceptual model for integrating MPLS with MANET protocols.

  • 380. Baikov, V. A.
    et al.
    Ibragimov, Nail
    Blekinge Institute of Technology, School of Engineering, Department of Mathematics and Natural Sciences.
    Zheltova, I. S.
    Yakovlev, A. A.
    Conservation laws for two-phase filtration models2014In: Communications in nonlinear science & numerical simulation, ISSN 1007-5704, E-ISSN 1878-7274, Vol. 19, no 2, p. 383-389Article in journal (Refereed)
    Abstract [en]

    The paper is devoted to investigation of group properties of a one-dimensional model of two-phase filtration in porous medium. Along with the general model, some of its particular cases widely used in oil-field development are discussed. The Buckley-Leverett model is considered in detail as a particular case of the one-dimensional filtration model. This model is constructed under the assumption that filtration is one-dimensional and horizontally directed, the porous medium is homogeneous and incompressible, the filtering fluids are also incompressible. The model of "chromatic fluid" filtration is also investigated. New conservation laws and particular solutions are constructed using symmetries and nonlinear self-adjointness of the system of equations.

  • 381.
    Bajramovic, Kemal
    Blekinge Institute of Technology, School of Computing.
    Implementing e-Government in Bosnia and Herzegovina: Practices and Challenges for the State government2011Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Context: Electronic Government (sometimes referred to as digital government, online government) is the use of information and communication technologies to: a) enable optimization and innovation of all government internal processes in the back-office and external processes by providing government services to customers through Internet and other electronic means; and b) facilitate achieving goals of all government policies and strategies. Objectives: In this study we are explaining e-Government practices, perceptions and performances of state institutions of Bosnia and Herzegovina (BiH) and analyzing obstacles and challenges of current approach to e-Government management, in order to propose immediate and middle-term e-Government actions for BiH state institutions to start delivering integrated and useful e-Government services. Methods: In this, three sources of information are used: a) comprehensive survey of state employees, b) interviews with some of the e-Government practitioners and c) systematic review of a number of relevant article sources. All questions/reviews have been done in order to find out what measures could be taken and what guidelines should be followed by the BiH state institutions so they become more IT savvy in taking advantage of e-Government implementations. Results: Measures for improvements have been proposed in several distinct areas: building human capacities for e-Government development, changing management and leadership practices, building regulatory and organizational framework for e-Government and resolving interpersonal issues in e-Government systems design. Additionally, a Phase plan for e-Government project implementation is proposed to those having a vision and idea on some e-Government project, but maybe lacking the skills and knowledge on how to actually initiate, design and implement it. Conclusions: We conclude that BiH state government should realize that e-Government is not just about implementing some IT projects; it is an overall public administration reform process which has to be adequately supported by regulative and organizational measures. This thesis provided arguments for such strategic e-Government decision-making and necessity for government-wide management and development capacity. We conclude that there is a need for BiH state government to understand the current situation and arguments presented, and take steps in building its capacities in this field.

  • 382. Bajwa, Sohaib Shahid
    et al.
    Gencel, Cigdem
    What are the Significant Cost Factors for COSMIC Functional Size Based Effort Estimation?2009Conference paper (Refereed)
    Abstract [en]

    This paper investigates the nature of the relationship between software product size measured in Common Software Measurement International Consortium (COSMIC) Function Points and the development effort. We investigated both numerical and categorical cost factors which have a significant effect on this relationship based on the empirical studies we conducted using the International Software Benchmarking Standards Group (ISBSG) Dataset Release 10. For the statistical analyses, we performed step wise Analysis of Variance (ANOVA), Analysis of Co-Variance (ANCOVA) and Linear Regression Analysis techniques. In this paper, we discuss the results we obtained and the significance of the results for the software organizations who would like to improve their effort estimation processes.

  • 383.
    Bajwa, Sohaib-Shahid
    Blekinge Institute of Technology, School of Engineering, Department of Interaction and System Design.
    Investigating the Nature of Relationship between Software Size and Development Effort2008Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Software effort estimation still remains a challenging and debatable research area. Most of the software effort estimation models take software size as the base input. Among the others, Constructive Cost Model (COCOMO II) is a widely known effort estimation model. It uses Source Lines of Code (SLOC) as the software size to estimate effort. However, many problems arise while using SLOC as a size measure due to its late availability in the software life cycle. Therefore, a lot of research has been going on to identify the nature of relationship between software functional size and effort since functional size can be measured very early when the functional user requirements are available. There are many other project related factors that were found to be affecting the effort estimation based on software size. Application Type, Programming Language, Development Type are some of them. This thesis aims to investigate the nature of relationship between software size and development effort. It explains known effort estimation models and gives an understanding about the Function Point and Functional Size Measurement (FSM) method. Factors, affecting relationship between software size and development effort, are also identified. In the end, an effort estimation model is developed after statistical analyses. We present the results of an empirical study which we conducted to investigate the significance of different project related factors on the relationship between functional size and effort. We used the projects data in the International Software Benchmarking Standards Group (ISBSG) dataset. We selected the projects which were measured by utilizing the Common Software Measurement International Consortium (COSMIC) Function Points. For statistical analyses, we performed step wise Analysis of Variance (ANOVA) and Analysis of Co-Variance (ANCOVA) techniques to build the multi variable models. We also performed Multiple Regression Analysis to formalize the relation.

  • 384.
    Bakht, Syed Sikandar
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Ahmad, Qazi Sohail
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    A Multi Agent Web Based Simulation Model for Evaluating Container Terminal Management2006Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This thesis provides a software prototype of Container Terminal Management system with the help of a Multi Agent systems technology. The goal that has been tried to achieve during this research work was to solve the management issues residing in a CT. The software prototype can be implemented as simulation software that will help the Terminal Managers to take necessary decisions for the better productivity of CT. The CTs are struggling with taking proper management decisions. There are many policies implemented but the use of a certain policy at a proper time is the main issue. It is possible with simulation software to visualize the affects of decisions taken by the implementation of a policy and see the expected output. This can really improve the performance of a CT. The management decision problem is solved by modeling the whole CT in a computer modeling language. The prototype shows all the actors appearing in a CT in the form of Agents and these agents are responsible for carrying out certain tasks. The prototype is the final contribution along with partial implementation. The model is proposed to be a web based system which removes the platform dependability problem and provide availability online.

  • 385.
    Bakht, Syed Sikandar
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Ahmad, Qazi Sohail
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    A Multi Agent Web Based Simulation Model for Evaluating Container Terminal Management2008Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This thesis provides a software prototype of Container Terminal Management system with the help of a Multi Agent systems technology. The goal that has been tried to achieve during this research work was to solve the management issues residing in a CT. The software prototype can be implemented as simulation software that will help the Terminal Managers to take necessary decisions for the better productivity of CT. The CTs are struggling with taking proper management decisions. There are many policies implemented but the use of a certain policy at a proper time is the main issue. It is possible with simulation software to visualize the affects of decisions taken by the implementation of a policy and see the expected output. This can really improve the performance of a CT. The management decision problem is solved by modeling the whole CT in a computer modeling language. The prototype shows all the actors appearing in a CT in the form of Agents and these agents are responsible for carrying out certain tasks. The prototype is the final contribution along with partial implementation. The model is proposed to be a web based system which removes the platform dependability problem and provide availability online.

  • 386.
    Bakhtyar, Shoaib
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Designing Electronic Waybill Solutions for Road Freight Transport2016Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    In freight transportation, a waybill is an important document that contains essential information about a consignment. The focus of this thesis is on a multi-purpose electronic waybill (e-Waybill) service, which can provide the functions of a paper waybill, and which is capable of storing, at least, the information present in a paper waybill. In addition, the service can be used to support other existing Intelligent Transportation System (ITS) services by utilizing on synergies with the existing services. Additionally, information entities from the e-Waybill service are investigated for the purpose of knowledge-building concerning freight flows.

    A systematic review on state-of-the-art of the e-Waybill service reveals several limitations, such as limited focus on supporting ITS services. Five different conceptual e-Waybill solutions (that can be seen as abstract system designs for implementing the e-Waybill service) are proposed. The solutions are investigated for functional and technical requirements (non-functional requirements), which can potentially impose constraints on a potential system for implementing the e-Waybill service. Further, the service is investigated for information and functional synergies with other ITS services. For information synergy analysis, the required input information entities for different ITS services are identified; and if at least one information entity can be provided by an e-Waybill at the right location we regard it to be a synergy. Additionally, a service design method has been proposed for supporting the process of designing new ITS services, which primarily utilizes on functional synergies between the e-Waybill and different existing ITS services. The suggested method is applied for designing a new ITS service, i.e., the Liability Intelligent Transport System (LITS) service. The purpose of the LITS service isto support the process of identifying when and where a consignment has been damaged and who was responsible when the damage occurred. Furthermore, information entities from e-Waybills are utilized for building improved knowledge concerning freight flows. A freight and route estimation method has been proposed for building improved knowledge, e.g., in national road administrations, on the movement of trucks and freight.

    The results from this thesis can be used to support the choice of practical e-Waybill service implementation, which has the possibility to provide high synergy with ITS services. This may lead to a higher utilization of ITS services and more sustainable transport, e.g., in terms of reduced congestion and emissions. Furthermore, the implemented e-Waybill service can be an enabler for collecting consignment and traffic data and converting the data into useful traffic information. In particular, the service can lead to increasing amounts of digitally stored data about consignments, which can lead to improved knowledge on the movement of freight and trucks. The knowledge may be helpful when making decisions concerning road taxes, fees, and infrastructure investments.

  • 387.
    Bakhtyar, Shoaib
    Blekinge Institute of Technology, School of Computing.
    On the Synergies Between an Electronic Waybill and Intelligent Transport Systems Services2013Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The main purpose of this thesis is to investigate potential synergies between an electronic waybill (e-Waybill) and other Intelligent Transport System (ITS) services. An e-Waybill service, as presented in this thesis, should be able to perform the functions of a paper waybill (which is an important transport document and contains essential information about a consignment) and it should contain at least the information specified in a paper waybill. To investigate synergies between the e-Waybill solutions and ITS services, we present 5 conceptual e-Waybill solutions that differ in where the e-Waybill information is stored, read, and written. These solutions are further investigated for functional and technical requirements (non-functional requirements), which can potentially impose constraints on a potential system that should implement the e-Waybill service. A set of 20 ITS services are considered for synergy analysis in this thesis. These services are mainly for road transport, however most of them are relevant to be considered for utilization in other modes of transport as well. For information synergy analysis, the e-Waybill solutions are assessed based on their synergies with ITS services. For different ITS services, the required input information entities are identified; and if at least one information entity can be provided by an e-Waybill at the right location we regard it to be a synergy. The result from our synergy analysis may support the choice of practical e-Waybill systems, which has the possibility to provide high synergy with ITS services. This may lead to a higher utilization of ITS services and more sustainable transport, e.g., in terms of reduced congestion and emissions. Additionally, a service design method has been proposed for supporting the process of designing new ITS services, which primarily utilizes on functional synergies with already existing ITS services. In order to illustrate the usage of the suggested method, we have applied it for designing a new ITS service, i.e., the Liability Intelligent Transport System (LITS) service. The purpose of the LITS service is to support the process of identifying when, where, and by whom a consignment has been damaged and who was responsible when the consignment was damaged.

  • 388.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, School of Computing.
    Afridi, Qaisar Zaman
    Blekinge Institute of Technology, School of Computing.
    Performance Evaluation of Two Different Usability Evaluation Methods in the Context of Collaborative Writing Systems2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In today’s world of rapid technological development one cannot deny the importance of collaborative writing systems. Besides many advantages of a collaborative writing system the major one is to allow its end users to work in collaboration with each other without having to physically meet. In the past various researches has been carried out for the usability evaluation of collaborative writing systems using the think aloud protocol method however there is no study conducted on the comparison of different usability evaluation methods in the context of collaborative writing systems. In this thesis work the authors have tried to find the limitations and capabilities of think aloud protocol and co-discovery learning methods in the context of a collaborative writing system called ZOHO, as well as the usability evaluation of ZOHO using think aloud protocol and co-discovery learning methods. The authors found various usability errors in ZOHO. Apart from this the authors also observed the two usability evaluation methods when they were used for usability evaluation of ZOHO. The authors found that both the methods have its’ own benefits and drawbacks. While the co-discovery learning method was fast enough, it was expensive in terms of human resource. On the other hand think aloud protocol method was slow to perform but there was less human resource used. Both the usability methods found almost the same usability errors.

  • 389.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Henesey, Lawrence
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Freight transport prediction using electronic waybills and machine learning2014In: 2014 International Conference on Informative and Cybernetics for Computational Social Systems, IEEE Computer Society, 2014, p. 128-133Conference paper (Refereed)
    Abstract [en]

    A waybill is a document that accompanies the freight during transportation. The document contains essential information such as, origin and destination of the freight, involved actors, and the type of freight being transported. We believe, the information from a waybill, when presented in an electronic format, can be utilized for building knowledge about the freight movement. The knowledge may be helpful for decision makers, e.g., freight transport companies and public authorities. In this paper, the results from a study of a Swedish transport company are presented using order data from a customer ordering database, which is, to a larger extent, similar to the information present in paper waybills. We have used the order data for predicting the type of freight moving between a particular origin and destination. Additionally, we have evaluated a number of different machine learning algorithms based on their prediction performances. The evaluation was based on their weighted average true-positive and false-positive rate, weighted average area under the curve, and weighted average recall values. We conclude, from the results, that the data from a waybill, when available in an electronic format, can be used to improve knowledge about freight transport. Additionally, we conclude that among the algorithms IBk, SMO, and LMT, IBk performed better by predicting the highest number of classes with higher weighted average values for true-positive and false-positive, and recall.

  • 390.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Holmgren, Johan
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    A Data Mining Based Method for Route and Freight Estimation2015In: Procedia Computer Science, Elsevier, 2015, Vol. 52, p. 396-403Conference paper (Refereed)
    Abstract [en]

    We present a method, which makes use of historical vehicle data and current vehicle observations in order to estimate 1) the route a vehicle has used and 2) the freight the vehicle carried along the estimated route. The method includes a learning phase and an estimation phase. In the learning phase, historical data about the movement of a vehicle and of the consignments allocated to the vehicle are used in order to build estimation models: one for route choice and one for freight allocation. In the estimation phase, the generated estimation models are used together with a sequence of observed positions for the vehicle as input in order to generate route and freight estimates. We have partly evaluated our method in an experimental study involving a medium-size Swedish transport operator. The results of the study indicate that supervised learning, in particular the algorithm Naive Bayes Multinomial Updatable, shows good route estimation performance even when significant amount of information about where the vehicle has traveled is missing. For the freight estimation, we used a method based on averaging the consignments on the historical known trips for the estimated route. We argue that the proposed method might contribute to building improved knowledge, e.g., in national road administrations, on the movement of trucks and freight.

  • 391.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, School of Computing.
    Holmgren, Johan
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan
    Blekinge Institute of Technology, School of Computing.
    A synergy based method for designing ITS services2013In: international Journal of Advanced Logistics, ISSN 2287-7592, Vol. 2, no 2, p. 45-54Article in journal (Refereed)
    Abstract [en]

    In this paper, we propose a method for supporting the process of designing Intelligent Transportation System (ITS) services, which utilizes on primarily functional synergies with already existing services. Using synergies between services will enable sharing of resources, such as, information entities, functions and technical resources, which in turn may lead to reduced costs for implementing services. The method is built around an existing service description framework, which is used to describe both existing services and the service to be designed. In order to illustrate the usage of the suggested method, we have applied it for designing a new ITS service, i.e., the Liability Intelligent Transport System (LITS) service. The purpose of the LITS service is to support the process of identifying when, where and why freight has been damaged, and which actor was responsible when the freight was damaged. The LITS service may lead to better quality control of consignments and may also facilitate the identification of which actor was responsible for the freight damage, which is of particular interest in multi-modal transport. By applying our service design method we were able to identify that three out of four functions of the LITS service already exist in other existing ITS services. Therefore, the LITS service can be designed based on synergies with these services.

  • 392.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, School of Computing.
    Holmgren, Johan
    Blekinge Institute of Technology, School of Computing.
    Persson, Jan
    Analysis of information synergy between e-Waybill solutions and intelligent transport system services2013In: World Review of Intermodal Transportation Research (WRITR), ISSN 1749-4729, E-ISSN 1749-4737, Vol. 4, no 2-3, p. 123-139Article in journal (Refereed)
    Abstract [en]

    We present a study on information synergy between an electronic waybill (e-Waybill) and intelligent transportation system (ITS) services. A waybill is an important transport document, and it contains essential information about a consignment. We consider five e-Waybill solutions, which differ in where the e-Waybill information is stored, read, and written. We analyse 20 ITS services, and for each of them, the required input entities that can be provided by an e-Waybill are identified, and the synergy with each of the e-Waybill solutions is determined based on the location of the e-Waybill information. The analysis shows that e-Waybill solutions with storage at the freight-level enable the highest information synergy with ITS services. Our result may support the implementation of practical e-Waybill systems that provide high synergy with ITS services, which may lead to higher utilisation of ITS services and more sustainable transport, e.g., in terms of reduced congestion and emissions

  • 393.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Holmgren, Johan
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Persson, Jan A.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Technical Requirements of the e-Waybill Service2016In: International Journal of Computer and Communication Engineering, ISSN 2010-3743, ISSN 2010-3743, Vol. 5, no 2, p. 130-140Article in journal (Refereed)
    Abstract [en]

    An electronic waybill (e-Waybill) is a service whose purpose is to replace the paper waybill, which is a paper documents that traditionally follows a consignment during transport. An important purpose of the e-Waybill is to achieve a paperless flow of information during freight transport. In this paper, we investigate five e-Waybill solutions, that is, system design specifications for the e-Waybill, regarding their non-functional (technical) requirements. In addition, we discuss how well existing technologies are able to fulfil the identified requirements. We have identified that information storage, synchronization and conflict management, access control, and communication are important categories of technical requirements of the e-Waybill service. We argue that the identified technical requirements can be used to support the process of designing and implementing the e-Waybill service.

  • 394.
    Bakhtyar, Shoaib
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Mbiydzenyuy, Gideon
    Netport Science Park, Karlshamn.
    Henesey, Lawrence
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    A Simulation Study of the Electronic Waybill Service2015In: Proceedings - EMS 2015: UKSim-AMSS 9th IEEE European Modelling Symposium on Computer Modelling and Simulation / [ed] David Al-Dabas, Gregorio Romero, Alessandra Orsoni, Athanasios Pantelous, IEEE Computer Society, 2015, p. 307-312Conference paper (Refereed)
    Abstract [en]

    We present results from a simulation study, whichwas designed for investigating the potential positive impacts, i.e., the invoicing and processing time, and financial savings,when using an electronic waybill instead of paper waybillsfor road-based freight transportation. The simulation modelis implemented in an experiment for three different scenarios,where the processing time for waybills at the freight loadingand unloading locations in a particular scenario differs fromother scenarios. The results indicate that a saving of 65%–99%in the invoicing time can be achieved when using an electronicwaybill instead of paper waybills. Our study can be helpful todecision makers, e.g., managers and staff dealing with paperwaybills, to estimate the potential benefits when making deci-sions concerning the implementation of an electronic waybillsolution for replacing paper waybills.

  • 395. Bakhtyar, Shoaib
    et al.
    Persson, Jan A.
    Holmgren, Johan
    Achieving services when turning a waybill into an e-waybill2011Conference paper (Refereed)
    Abstract [en]

    The focus of this paper is to present potential electronic waybill (e-waybill) solutions for a traditional waybill with the potential for supporting different Intelligent Transport System (ITS) services, such as, identification of freight, automating the exchange of content-related data for regulatory or commercial purposes, etc. At present there are some initiatives, for instance, by the International Air Transport Association (IATA) and the e-Freight framework, for achieving solutions that can handle e-waybills. Both these solutions focus on actor-to-actor communication, however we hypothesize that the storage of a waybill’s data both locally and centrally (i.e. actor-to-actor as well as goods-to-actor communication) can support more services than only central storage of the waybill’s data. Further we look at the information required and possible communication links between different actors in order to identify different ITS services that can be achieved through an e-waybill solution. We then map this information on to the e-waybill solutions that we have proposed, which will allow us to identify which services are supported by the different e-waybill solutions.

  • 396.
    Bala, Jaswanth
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Filtering estimated series of residential burglaries using spatio-temporal route calculations2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Context. According to Swedish National Council for Crime Prevention, there is an increase of 19% in residential burglary crimes in Sweden over the last decade and only 5% of the total crimes reported were actually solved by the law enforcement agencies. In order to solve these cases quickly and efficiently, the law enforcement agencies has to look into the possible linked serial crimes. Many studies have suggested to link crimes based on Modus Operendi and other characteristic. Sometimes crimes which are not possible to travel spatially with in the reported times but have similar Modus Operendi are also grouped as linked crimes. Investigating such crimes could possibly waste the resources of the law enforcement agencies.

    Objectives. In this study, we investigate the possibility of the usage of travel distance and travel duration between different crime locations while linking the residential burglary crimes. A filtering method has been designed and implemented for filtering the unlinked crimes from the estimated linked crimes by utilizing the distance and duration values.

    Methods. The objectives in this study are satisfied by conducting an experiment. The travel distance and travel duration values are obtained from various online direction services. The filtering method was first validated on ground truth represented by known linked crime series and then it was used to filter out crimes from the estimated linked crimes.

    Results. The filtering method had removed a total of 4% unlinked crimes from the estimated linked crime series when the travel mode is considered as driving. Whereas it had removed a total of 23% unlinked crimes from the estimated linked crime series when the travel mode is considered as walking. Also it was found that a burglar can take an average of 900 seconds (15 minutes) for committing a burglary.

    Conclusions. From this study it is evident that the usage of spatial and temporal values in linking residential burglaries gives effective crime links in a series. Also, the usage of Google Maps for getting distance and duration values can increase the overall performance of the filtering method in linking crimes.

  • 397.
    Balakrishnan, Radhakrishnan
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Kesavan, Shijith Kunneth
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    CAD TOOLS FOR HYBRID INTEGRATION2015Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In this thesis, we present a graphical computer-aided design (CAD) environment for the design, analysis and layout of printed electronic batteries in the first phase and the parasitic extraction of the connecting wires in the second phase. The primary motivation of our work is that this prototyping software tool so far does not exist. Our tool has been integrated within the existing CAD tool which allows quick prototyping and simplifies the interface between the system designer and the device manufacturer. This tools supports the schematic and layout entry, rule checking and netlist generation. The first phase of the device synthesis modelling is based on Enfucell printed batteries, by which using the CAD tool, the shape of the battery is optimized and designed to fit the product and is able to simulate the performance during the optimization, whereas the second phase is the parasitic extraction using an extracting tool named fasthenry, which is integrated to our CAD tool to extract unwanted resistance and inductance within the shared wires between the battery and other devices. We believe that the availability of this tool is useful to the CAD community for novel ideas in the circuit design for flexible hybrid electronics.

  • 398.
    Ballesteros, Luis Guillermo Martinez
    et al.
    KTH Royal Inst Technol, Radio Syst Lab RSLab, Stockholm, Sweden..
    Ickin, Selim
    Ericsson Res, Stockholm, Sweden..
    Fiedler, Markus
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems.
    Markendahl, Jan
    KTH Royal Inst Technol, Radio Syst Lab RSLab, Stockholm, Sweden..
    Tollmar, Konrad
    KTH Royal Inst Technol, Radio Syst Lab RSLab, Stockholm, Sweden..
    Wac, Katarzyna
    Univ Copenhagen, DK-1168 Copenhagen, Denmark..
    Energy Saving Approaches for Video Streaming on Smartphone based on QoE Modeling2016In: 2016 13TH IEEE ANNUAL CONSUMER COMMUNICATIONS & NETWORKING CONFERENCE (CCNC), IEEE Communications Society, 2016Conference paper (Refereed)
    Abstract [en]

    In this paper, we study the influence of video stalling on QoE. We provide QoE models that are obtained in realistic scenarios on the smartphone, and provide energy-saving approaches for smartphone by leveraging the proposed QoE models in relation to energy. Results show that approximately 5J is saved in a 3 minutes video clip with an acceptable Mean Opinion Score (MOS) level when the video frames are skipped. If the video frames are not skipped, then it is suggested to avoid freezes during a video stream as the freezes highly increase the energy waste on the smartphones.

  • 399.
    Banadaki, Davood Dehgan
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Durmush, Sunay Sami
    Blekinge Institute of Technology, School of Engineering.
    Zahiri, Sharif
    Blekinge Institute of Technology, School of Engineering.
    Statistical Assessment of Uncertainties Pertaining to Uniaxial Vibration Testing and Required Test Margin for Fatigue Life Verification2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In the automotive industry uniaxial vibration testing is a common method used to predict the lifetime of components. In reality truck components work under multiaxial loads meaning that the excitation is multiaxial. A common method to account for the multiaxial effect is to apply a safety margin to the uniaxial test results. The aim of this work is to find a safety margin between the uniaxial and multiaxial testing by means of virtual vibration testing and statistical methods. Additionally to the safety margin the effect of the fixture’s stiffness on the resulting stress in components has been also investigated.

  • 400.
    Banelis, Justas
    et al.
    Blekinge Institute of Technology, School of Computing.
    Proscevicius, Arunas
    Blekinge Institute of Technology, School of Computing.
    Streaming Video Based on an Intelligent Frame Skipping Technique2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Video streaming is an important field of global communications and data processing. It is divided into server and client sides connected via network. Video streaming is concerned with delivering video data from server to client over the network as fast and with as little loss as possible. In this study the possibilities to minimize the amount of data transferred over the network in video streaming are investigated and a video streaming technique comprised of server and client sides is proposed. To expand the flexibility and adaptability of the proposed video streaming technique an operational parameter system was constructed and the parameter value ranges were defined. The proposed video streaming technique was then applied to three sample videos. Before streaming the server side of the proposed technique reduced the frame count of input videos based on operational parameter values while the client side reconstructed the skipped frames. Then the quality of the resulting videos was measured and evaluated. To evaluate the reconstructed frames and videos the PSNR measurement method was used. The study concludes that by using the proposed video streaming technique it is possible to reduce the amount of transfer data by dropping frames on the server side and reconstructing them on the client side.

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