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  • 1101. Ballal, Tarig
    et al.
    Grbic, Nedelko
    Mohammed, Abbas
    A Simple and Computationally Efficient Algorithm for Real-Time Blind Source Separation of Speech Mixtures2006Conference paper (Refereed)
    Abstract [en]

    In this paper we exploit the amplitude diversity provided by two sensors to achieve blind separation of two speech sources. We propose a simple and highly computationally efficient method for separating sources that are W-disjoint orthogonal (W-DO), that are sources whose time-frequency representations are disjoint sets. The Degenerate Unmixing and Estimation Technique (DUET), a powerful and efficient method that exploits the W-disjoint orthogonality property, requires extensive computations for maximum likehood parameter learning. Our proposed method avoids all the computations required for parameters estimation by assuming that the sources are "cross high-low diverse (CH-LD)", an assumption that is explained later and that can be satisfied exploiting the sensors settings/directions. With this assumption and the W-disjoint orthogonality property, two binary time-frequency masks that can extract the original sources from one of the two mixtures, can be constructed directly from the amplitude ratios of the time-frequency points of the two mixtures. The method works very well when tested with both artificial and real mixtures. Its performance is comparable to DUET, and it requires only 2% of the computations required by the DUET method. Moreover, it is free of convergence problems that lead to poor SIR ratios in the first parts of the signals. As with all binary masking approaches, the method suffers from artifacts that appear in the output signals.

  • 1102. Ballal, Tarig
    et al.
    Grbic, Nedelko
    Mohammed, Abbas
    Blind Source Separation of Speech Mixtures using a Simple and Computationally Efficient Time-Frequency Approach2007Conference paper (Refereed)
  • 1103. Ballal, Tarig
    et al.
    Grbic, Nedelko
    Mohammed, Abbas
    Sensor Array Blind Source Separation using Time-Frequency Masking2006Conference paper (Refereed)
  • 1104.
    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.

  • 1105.
    Ballovarre, Eva
    et al.
    Blekinge Institute of Technology, School of Health Science.
    Vallsäter, Rebecca
    Blekinge Institute of Technology, School of Health Science.
    Bemötande: en litteraturstudie om bemötande av patienter med fetma2004Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    Bakgrunden till föreliggande studie är att fetman är ett av de snabbast växande folkhälsoproblemen både nationellt och internationellt. Studier visar att personer med fetman diskrimineras i samhället. Syftet med denna studie var att belysa hur patienter med fetman blir bemötta nom vården. Författarna valde att göra en litteraturstudie som grundade sig på åtta vetenskapliga artiklar som granskades med inspiration av Granheim och Lundmans (2003) analysmodell. I resultatet framkom fyra teman vilka alla visade att patienter med fetma blir diskriminerade av vårdpersonal. I diskussionen knyter författarna an till Kari Martinsens omvårdnadsteori för att förklara vikten av gott bemötande. Slutsatsen som författarna drog av studien var att patienter med fetma blir diskriminerade trots den humanistiska människosynen som ska genomsyra sjukvården.

  • 1106.
    Balogun, Abass
    Blekinge Institute of Technology, School of Management.
    An evaluation of the risks involved in onshore IT outsourcing -A case study of Citiserve Limited Nigeria2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    IT outsourcing has been, and will continue to be a widely accepted strategic option for organizations growth and attainment of its set objectives. It has brought about state-of-the-art technology in the form of improved business processes, a strategic focus on core competences and cost saving techniques amongst others. At the same time, it has brought with it the challenges that need to be addressed if the process was to fulfil its set objectives without impairing the goals and objectives of the firm. Due care and diligence should be taken to mitigate IT risks such as unforeseen escalated costs, vendor lock-in, confidentiality problems and so on. In forestalling these challenges, the recipient is expected to ensure that the vendors are competent and guided by relevant professional ethics; here, certifications play an enormous role in assuring the service recipients they are dealing with the right vendors. It is crucial that the recipient set out in clear and concise terms, the conditions of the relationship using a detailed contract. This would specify the deliverables, service expectations and penalties or litigations. Overall, the thesis is built on answering the research questions:  Why do organizations outsource IT services?  What are those risks involved in IT outsourcing?  How can the IT risks be mitigated? Leveraging on the case study of Citiserve Limited (Nigeria); this research made attempt to align the theories and the case in bringing to the fore the seeming trend emanating from IT outsourcing in service (logistics, distribution and marketing) industry.

  • 1107.
    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.

  • 1108.
    Bandari, Shiva Ram
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Investigation on Flow Control Valve by CFD Simulation2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In a water distribution system, Flow Control Valve is used to control the flow rate in the pipeline connections. In this thesis, a fixed flow control valve is investigated to reduce the flow rate and set to deliver the pre-set flow of 5-6 LPM (litre per minute). Which helps to distribute the water for a maximum period and maintains the usage only for the drinking purpose. A geometry of FCV with a ball check valve is implemented, where the ball check helps to stop the back flow of the fluid from the valve. Detailed inspection of dynamic changes in pressure and flow velocity in the valve are conducted through simulation. The study of fluid properties describes the expected design and specifies the flow structure in the valve. The results of this project demonstrate a good performance of the design-build and influence the requirements. The obtained values in the simulation, analytical and experimental results are compatible, which concludes the survey of FCV is equipped to custom.

  • 1109.
    Bandari Swamy Devender, Vamshi Krishna
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Adike, Sneha
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Design and Performance of an Event Handling and Analysis Platform for vSGSN-MME event using the ELK stack2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Data Logging is the main activity to be considered in maintaining a server or database in working condition without any errors or failures. Data collection can be automatic, so, no human presence is necessary. To store the data of logs for many days and visualizing became a huge problem in recent days. Coming to node SGSN-MME, which is the main component of the GPRS network, which handles all packet switched data within the mobile operator's network. A lot of log data is generated and stored in file systems on the redundant File Server Boards in SGSN-MME node. The evolution of the SGSN-MME is taking it from dedicated, purpose-built, hardware into virtual machines in the Cloud, where virtual file server boards fit very badly. The purpose of this thesis is to give a better way to store the log data and add visualization using the ELK stack concept. Fetching useful information from logs is one of the most important part of this stack and is being done in Logstash using its grok filters and a set of input, filter and output plug-ins which helps to scale this functionality for taking various kinds of inputs ( file,TCP, UDP, gemfire, stdin, UNIX, web sockets and even IRC and twitter and many more) , filter them using (groks,grep,date filters etc.)and finally write output to ElasticSearch. The Research Methodology involved in carrying out this thesis work is a Qualitative approach. A study is carried using the ELK concept with respect to Legacy approach in Ericsson company. A suitable approach and the better possible solution is given to the vSGSN-MME node to store the log data. Also to provide the performance and uses multiple users of input providers and provides the analysis of the graphs from the results and analysis. To perform the tests accurately, readings are taken in defined failure scenarios. From the test cases, a plot is provided on the CPU load in vSGSN-MME which easily gives the suitable and best promising way.

  • 1110.
    Bandreddy, Pavan
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Pokala, Bhargav
    Blekinge Institute of Technology, School of Engineering.
    Perceptual Video Quality Assessment Tool2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Compressing the video data is necessary for video transmission over networks with limited resources. Video quality at the end is based on the compression techniques used. In this research work, we mainly focused on compressing video files using H.264 encoding by considering some parameters and conducting a subjective test on the resulting compressed videos in a specially developed Perceptual Video Quality Assessment (PVQA) tool. This PVQA tool was developed as part of the thesis project. For the compression techniques, we have considered spatial resolutions (i.e. VGA and QVGA), temporal resolutions (i.e. 25fps and 12.5fps) and bit rate (i.e. 300kbps and 600kbps). By considering these parameters for three different test sequences, we down scaled and encoded to transmit over lossless channel. The received data is decoded and up scaled using open source software’s. For encoding and decoding of videos in H.264, we used JM reference software. For scaling the videos spatially and temporally, both FFMPEG and Virtual Dub are used. For up scaling the decoded video in spatial resolution (QVGA to VGA) two filter methods are used i.e. Bicubic Interpolation and Nearest Neighbor technique in Virtual Dub. For up scaling in temporal resolution (12.5fps to 25fps) the repeat frame method of Virtual Dub is used. These generated videos were evaluated by conducting subjective tests to determine the best technique that is suitable for transmission over a bit rate limited network. The developed PVQA tool satisfies the requirements of International Telecommunication Union (ITU) standard ITU-R BT.500-12. The PVQA tool will ask the subjects to grade the videos quality according to his/her experience and these grades are saved in excel sheets. The PVQA tool was developed under Java environment, with the VLC player embedded. The tool was designed to support the video. Results of the subjective video quality survey are summarized and finally conclusions are given.

  • 1111.
    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.

  • 1112.
    Baniassadi, Michelle
    et al.
    Blekinge Institute of Technology, School of Health Science.
    Ahlman, Per
    Blekinge Institute of Technology, School of Health Science.
    Personers upplevelser av att leva med hjärtsvikt: NYHA- klass II-IV2013Student thesis
    Abstract [sv]

    Bakgrund: Hjärtsvikt betraktas som ett stort problem i världen och ökar ständigt, samt att det tillhör en av de vanligaste folksjukdomarna i Sverige. Personer som lever med hjärtsvikt får en påverkan på det dagliga livet och det är vanligt att de upplever fysiska, psykiska och sociala begränsningar i sin vardag. Sjuksköterskan skall vägleda och informera personerna som lever med sjukdomen att uppmärksamma sina symtom för att undvika försämring av tillståndet. Syfte: Syftet med studien var att beskriva personers upplevelser av att leva med hjärtsvikt av NYHA- klass II-IV Metod: Det gjordes en strukturerad litteraturstudie med kvalitativ ansats som baserades på nio vetenskapliga artiklar. Analysen genomfördes utifrån en manifest innehållsanalys med latenta inslag av inspiration från Graneheim och Lundmans tolkning av innehållsanalys. Resultat: Analysen resulterade i fyra kategorier och nio underkategorier. De fyra kategorierna var En förändrad vardag, Livet känns främmande och osäkert, Beroende och oberoende och Livet har en mening. Slutsats: Resultatet påvisade att hjärtsvikten i hög grad påverkade personernas vardag. Fysiska begränsningar, social isolering, trötthet, rädsla och oro inför döden samt hopplöshet var några negativa upplevelser av hjärtsvikten. Några positiva upplevelser var att försöka finna mening i vardagen trots sjukdomen, bevara autonomin och känna stödet från familj och vänner. Att finna betydelsefulla aspekter i livet gav hopp inför framtiden. Intressant för framtida forskning skulle kunna vara studier om skillnader mellan kvinnor och mäns upplevelser av hjärtsvikt

  • 1113.
    Bankaoglu, Cagatay
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    IMPACT FAILURE ASSESSMENT ON CRUSHER DISK BY RIGID AND ELASTO-PLASTIC BODY APPROXIMATIONS2014Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Rigid and elasto-plastic body simulations and analytical methods were carried out to identify and assess impact forces based on their contact durations and force magnitudes. Based on the estimations, most severe cases were simulated in ABAQUS to assess the possible damage on crusher disk component of crusher machines, designed and manufactured by MRT System Karlskrona. Further analyses were carried out to combine both impact force estimations and damage assessment. It was concluded that studied case of impact was not a likely scenario to cause the damage occurring under normal operation conditions in the studied type of crusher machines with the material properties considered in this work.

  • 1114. Bao, Vo Nguyen Quoc
    et al.
    Duong, Quang Trung
    Blekinge Institute of Technology, School of Computing.
    Exact Outage Probability of Cognitive Underlay DF Relay Networks with Best Relay Selection2012In: IEICE transactions on communications, ISSN 0916-8516, E-ISSN 1745-1345, Vol. E95-B, no 6, p. 2169-2173Article in journal (Refereed)
    Abstract [en]

    In this letter, we address the performance analysis of underlay selective decode-and-forward (DF) relay networks in Rayleigh fading channels with non-necessarily identical fading parameters. In particular, a novel result on the outage probability of the considered system is presented. Monte Carlo simulations are performed to verify the correctness of our exact closed-form expression. Our proposed analysis can be adopted for various underlay spectrum sharing applications of cognitive DF relay networks.

  • 1115. Bao, Vo Nguyen Quoc
    et al.
    Duong, Quang Trung
    Blekinge Institute of Technology, School of Computing.
    Outage Analysis of Cognitive Multihop Networks under Interference Constraints2012In: IEICE transactions on communications, ISSN 0916-8516, E-ISSN 1745-1345, Vol. E95-B, no 3Article in journal (Refereed)
    Abstract [en]

    The closed-form expressions for outage probability, bit error rate, and ergodic capacity of spectrum sharing-based multi-hop decode-and-forward relay networks in non-identical Rayleigh fading channels are derived. Utilizing these precise and tractable analytical formulas, we can study the impact of key network parameters on the performance of cognitive multi-hop relay networks under interference constraints. The analytical expressions are verified by Monte-Carlo simulations.

  • 1116. Bao, Vo Nguyen Quoc
    et al.
    Duong, Quang Trung
    Blekinge Institute of Technology, School of Computing.
    da Costa, Daniel Benevides
    Alexandropoulos, George C.
    Nallanathan, A.
    Cognitive Amplify-and-Forward Relaying with Best Relay Selection in Non-Identical Rayleigh Fading2013In: IEEE Communications Letters, ISSN 1089-7798, E-ISSN 1558-2558, Vol. 17, no 3, p. 475-478Article in journal (Refereed)
    Abstract [en]

    This paper investigates several important performance metrics of cognitive amplify-and-forward (AF) relay networks with a best relay selection strategy and subject to nonidentical Rayleigh fading. In particular, assuming a spectrum sharing environment consists of one secondary user (SU) source,K SU relays, one SU destination, and one primary user (PU) receiver, closed-form expressions for the outage probability (OP), average symbol error probability (SEP), and ergodic capacity of the SU network are derived. The correctness of the proposed analysis is corroborated via Monte Carlo simulations and readily allows us to evaluate the impact of the key system parameters on the end-to-end performance. An asymptotic analysis is also carried out and reveals that the diversity gain is defined by the number of relays pertaining to the SU network (i.e., K), being therefore not affected by the interference power constraint of the PU network.

  • 1117. Bao, Vo Nguyen Quoc
    et al.
    Duong, Quang Trung
    Blekinge Institute of Technology, School of Computing.
    Tellambura, Chintha
    On the performance of cognitive underlay multihop networks with imperfect channel state information2013In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 61, no 12, p. 4864-4873Article in journal (Refereed)
    Abstract [en]

    This paper proposes and analyzes cognitive multihop decode-and-forward networks in the presence of interference due to channel estimation errors. To reduce interference on the primary network, a simple yet effective back-off control power method is applied for secondary multihop networks. For a given threshold of interference probability at the primary network, we derive the maximum back-off control power coefficient, which provides the best performance for secondary multihop networks. Moreover, it is shown that the number of hops for secondary network is upper-bounded under the fixed settings of the primary network. For secondary multihop networks, new exact and asymptotic expressions for outage probability (OP), bit error rate (BER) and ergodic capacity over Rayleigh fading channels are derived. Based on the asymptotic OP and BEP, a pivotal conclusion is reached that the secondary multihop network offers the same diversity order as compared with the network without back off. Finally, we verify the performance analysis through various numerical examples which confirm the correctness of our analysis for many channel and system settings and provide new insight into the design and optimization of cognitive multihop networks.

  • 1118. Bao, Vo Nguyen Quoc
    et al.
    Duong, Trung Quang
    Blekinge Institute of Technology, School of Computing.
    Nallanathan, Arugumam
    Karagiannidis, George K.
    Distributed Switch-and-Stay Combining in Cognitive Relay Networks under Spectrum Sharing Constraints2013In: 2013 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM), IEEE Communications Society, 2013, p. 1927-1932Conference paper (Refereed)
    Abstract [en]

    Distributed switch-and-stay combining (DSSC) has been envisioned as an effective transmission technique to achieve spatial diversity in a distributed fashion, with low implementation complexity. In this paper, we take a step further to incorporate DSSC into spectrum-limited environment, where the operating nodes have to share the frequency radio spectrum with licensed users. In particular, by deploying DSSC scheme in cognitive radio networks, we have shown that the low transmit power at unlicensed users, inflicted by the peak interference power constraint at licensed users, can be alleviated. We present closed-form expressions for outage probability and spectral efficiency, enabling us to evaluate and optimize the considered network performance. Numerical and simulation results show that when the switching threshold is below the outage threshold the full diversity order can be guaranteed at the secondary networks.

  • 1119. Bao, Vo Nguyen Quoc
    et al.
    Duong, Trung Quang
    Blekinge Institute of Technology, School of Computing.
    Nallanathan, Arugumam
    Tellambura, Chintha
    Effect of Imperfect Channel State Information on the Performance of Cognitive Multihop Relay Networks2013In: 2013 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM), 2013, p. 3458-3463Conference paper (Refereed)
    Abstract [en]

    Cognitive relay technology has been envisioned as a promising transmission scheme to enhance the reliability and coverage of secondary networks. However, the performance of cognitive relay networks (CRNs) is limited by the lack of accurate channel state information (CSI). As such, this paper adequately addresses the impact of imperfect CSI on the performance of cognitive multihop networks by proposing a simple yet effective backoff control power method. In addition, novel exact and asymptotic expressions for outage probability and ergodic capacity over Rayleigh fading channels are also derived. These tractable analytical results reveal new insight into the design, e.g., the number of hops for secondary network, and optimization of cognitive multihop networks.

  • 1120.
    Bao, Xiaoming
    Blekinge Institute of Technology, School of Planning and Media Design.
    From declined industrial areas to humanized public areas --a renewal practice of preservation and humanized reconstruction of Shanghai Yangpu Auxiliary Equipment factory2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This thesis investigates a factory's transformation from declined industrial area to the humanized public space. With the rapid development of China's economy, many old industrial areas in cities gradually fall into the plight of survival and development. In the early time, the renewal ignored the value of the old industrial areas. On the other hand, due to the original characteristics of industrial areas, they are facing challenges to be humanized public areas. This article starts with the background of current industrial areas renewal and points out the problems. In the next section, theoretical framework on the evaluation of old industrial areas, old industrial area preservation and humanized reconstruction are established to be the guide and principle of the case study. The successful case, Shanghai EXPO Urban Best Practices Area is chosen to find out how to seek for the balance between preservation and reconstruction into humanized public areas. Then the article establishes a relatively complete framework for planning and design, and demonstrates the framework through the design proposal of Shanghai Yangpu Auxiliary Equipment factory. This research serves as a practical model for preservation and reconstruction from old industrial area to the humanized public space. In addition, it also discussed and rethinks deeply over the problems of reusing old industrial areas.

  • 1121.
    Baolorphet, Phetphirun
    et al.
    Blekinge Institute of Technology, School of Health Science.
    Köpmans, Emma
    Blekinge Institute of Technology, School of Health Science.
    Är preoperativ kroppstvätt effektivt mot sårinfektioner: finns evidens?2012Student thesis
    Abstract [sv]

    Bakgrund: Den postoperativa sårinfektionen är den mest förekommande komplikationen för patienter som genomgått ett kirurgiskt ingrepp. Preoperativ kroppstvätt har funnits sedan 1800-talet i Sverige, trots detta insjuknar tusentals patienter årligen på grund av postoperativa sårinfektioner. Negativa konsekvenser framkommer för både patienten och sjukvården i form av extra vårdtid, lidande och kostnad. Syfte: Avsikten med studien var att undersöka om det finns evidens för att preoperativ kroppstvätt reducerar postoperativa sårinfektioner. Metod: En strukturerad litteraturstudie genomfördes som grundade sig på tolv vetenskapliga studier med kvantitativ ansats varav två är översiktsartiklar. De inkluderade artiklarna påträffades i CINAHL, MEDLINE, PubMed och Cochrane Database for Systematic Reviews. Därefter kvalitetsgranskades artiklarna enligt Willman, Stoltz och Bahtsevanis bedömningsprotokoll och analyserades enligt SBU:s evidensgraderingssystem GRADE. Resultat: Det finns flera olika antiseptiska medel som används vid kroppstvätt. Resultatet visade att Klorhexidin som desinfektionsmedel hade en stark evidens för reducering av postoperativa sårinfektioner. Slutsats: Evidens för kroppstvätt med Klorhexidin kan utgöra ett viktigt underlag som underlättar för sjuksköterskans kunskapsutveckling och informationsutbytet till patienten. Sjuksköterskans agerande utifrån evidensbaserad kunskap kan bidra till att patienten inser vikten av att utföra en noggrann kroppstvätt vid förebyggandet av postoperativa sårinfektioner.

  • 1122. Baptista, Ana Alice
    et al.
    Linde, PeterBlekinge Institute of Technology, The Library.Lavesson, NiklasBlekinge Institute of Technology, School of Computing.Brito, Miguel Abrunhosa de
    Social Shaping of Digital Publishing: Exploring the Interplay Between Culture and Technology - Proceedings of the 16th International Conference on Electronic Publishing2012Collection (editor) (Other academic)
    Abstract [en]

    Since the advent of the Web, the processes and forms of electronic publishing have been changing. The open access movement has been a major driver of change in recent years with regard to scholarly communication; however, changes are also evident in other fields of application such as e-government and e-learning. In most cases these changes are driven by technological advances, but there are also cases where a change in social reality pushes technological development. Both the social and mobile web and linked data are currently shaping the edge of research in digital publishing. Liquid publishing is on the more daring agendas. Digital preservation is an issue that poses great challenges which are still far from being solved. The legal issues, security and trust continue to deserve our full attention. We need new visualization techniques and innovative interfaces that will keep pace with the global dimension of information. This is the current scenario, but what will follow? What are the technologies and social and communication paradigms that we will be discussing in ten or twenty years? ELPUB 2012 focuses on the social shaping of digital publishing, exploring the interplay between culture and technology. This makes the fact that it is being held in the European Capital of Culture for 2012, Guimarães, Portugal, all the more appropriate. 52 submissions were received for ELPUB 2012, from which 23 articles and 10 posters were accepted after peer review. Of the accepted articles, 11 were submitted as full articles and 12 as extended abstracts. These articles have been grouped into sessions on the following topics: Sessions 1 and 4 – Digital Scholarship & Publishing; Session 2 – Special Archives; Session 3 – Libraries & Repositories, Session 5 – Digital Texts & Readings, and Session 6 – Future Solutions & Innovations. The programme features two keynote speeches. Kathleen Fitzpatrick's speech is entitled “Planned Obsolescence: Publishing, Technology, and the Future of the Academy”, that of Antonio Câmara is entitled “Publishing in 2021”. Finally we call your attention to the panel on e-books, which is entitled “Academic e-books – Technological hostage or cultural redeemer?”. We believe this is another great edition of the ELPUB conference. We would like to take this opportunity to thank both the members of the ELPUB executive committee and the members of the local advisory committee, for making it happen. Together they provided valuable advice and assistance during the entire organization process. Secondly we would like to mention our colleagues on the program committee, who assured the quality of the conference through the peer review process. Last but not least, we wish to thank the local organization team for ensuring that all this effort culminates in a very interesting scientific event on the 14th and 15th of June. Thank you all for helping us to maintain the quality of ELPUB and merit the trust of our authors and attendees. We wish you all a good conference and we say farewell, hoping to see you again in Sweden in 2013!

  • 1123.
    Baraslievska, Natalia
    Blekinge Institute of Technology, Faculty of Engineering, Department of Industrial Economics.
    Factors Affecting Employee Acceptance of Electronic Shelf Labels In a Mandatory Business Environment: -A Study Applying the UTAUT-Model in a Swedish Organization2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: The retail industry is one of the most competitive industries today as the emergence of the e-commerce has put significant pressure on traditional retailers. As price change frequencies have doubled, physical retailers struggle to adapt to online retailers; and as a result, new technologies for price automation such as Electronic Shelf Labels has emerged. However, as new technologies emerge managers and decision-makers need to understand the challenges with introducing novel technologies in workplaces; and what factors affect acceptance of said technology. This is an issue that is of interest as technologies are becoming mandatory in use in contrast to previous decades where they have been voluntary in use.

     

    Purpose: To understand what factors affect employee acceptance of Electronic Shelf Labels in a mandatory environment, and thus shed light on where managers and decision-makers need to put focus when introducing new technologies in business environments.

     

    Method: A descriptive and explanatory research design was chosen for this thesis, combined with a quantitative approach for data collection as well as data analysis. The chosen conceptual model for the thesis was the UTAUT-model upon which the questions of a self-administrated web-survey with close-ended questions was based upon. The survey was answered by employees of a market-leading Scandinavian retailer who today have Electronic Shelf Labels implemented in their stores. A total of 100 respondents answered the survey, and the results were analysed quantitatively through utilizing software such as SPSS Statistics for descriptive statistics and SmartPLS 3 for Structural Equation Modeling.

     

    Results: The results of the SEM-analysis unveiled that the main factors impacting technology acceptance of Electronic Shelf Labels in a mandated environment are facilitating conditions and attitude towards usage. The conceptual model explained 46,4% of the variance of the model which tested the constructs of the original UTAUT-model, with slight modifications. Moreover, the results unveiled that there was a high acceptance of ESL amongst employees, and that there is positive view on the technology and its benefits. 

     

    Conclusion: Theoretical, this study contributes in a new conceptual model that explains technology acceptance in mandatory business environments where facilitating conditions and attitude towards usage are the main predictors of technology acceptance. Practically, it suggests that decision-makers and managers need to put effort in ensuring a working infrastructure around a new technology and enough resources so that employees can use the technology properly. Moreover, encouragement of a positive attitude towards a new technology is also of importance – meaning that effort should be put in highlighting the benefits of new technologies pre-implementation and having responsible available that can demonstrate this in the introductory phase of the technology.    

     

    Delimitations: The limitations of this study are mainly tied to geographical location, time and sample size. The study only considers the Swedish stores of the Scandinavian retailer that was studied, and the study is restricted in time as it takes into account the technology acceptance of Electronic Shelf Labels under a certain time frame; as a result, it is not longitudinal. Lastly, the sample size of the survey is rather small, even though satisfactory for its intended use.

  • 1124.
    Barbosa, Ludwig
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Rasch, J.
    Molflow, Gothenburg, SWE.
    Carlstrom, A.
    RUAG Space AB, SWE.
    Pettersson, Mats
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Vu, Viet Thuy
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    A Simulation Study of the Effect of Ionospheric Vertical Gradients on the Neutral Bending Angle Error for GNSS Radio Occultation2017In: Progress in Electromagnetics Research Symposium, IEEE , 2017, p. 1540-1545Conference paper (Refereed)
    Abstract [en]

    Radio Occultation based on Global Navigation Satellite System signals (GNSS RO) is an increasingly important remote sensing technique. Its measurements are used to derive parameter of the Earth's atmosphere, e.g., pressure, temperature and humidity, with good accuracy. The systematic residual error present on the data processing is related to ionospheric conditions, such as the distribution of electrons and the resultant vertical gradient. This study investigates the relationship between these parameters and the residual ionospheric error (RIE) on the retrieved bending angle in the stratosphere. Chapman function combined to sinusoidal perturbations are used to model electron density profiles and compared to RO retrievals of the ionosphere to perform the investigation. The results confirmed that the major ionospheric influence on the retrieval error is related to the F-layer electron density peak, whereas small-scale vertical structures play a minor role.

  • 1125. Barbosa, Manuel
    et al.
    Moss, Andrew
    Blekinge Institute of Technology, School of Computing.
    Page, Dan
    Rodrigues, Nuno
    Silva, Paulo
    Type checking cryptography implementations2012In: Lecture Notes in Computer Science, Springer , 2012, Vol. 7141, p. 316-334Conference paper (Refereed)
    Abstract [en]

    Cryptographic software development is a challenging field: high performance must be achieved, while ensuring correctness and compliance with low-level security policies. CAO is a domain specific language designed to assist development of cryptographic software. An important feature of this language is the design of a novel type system introducing native types such as predefined sized vectors, matrices and bit strings, residue classes modulo an integer, finite fields and finite field extensions, allowing for extensive static validation of source code. We present the formalisation, validation and implementation of this type system.

  • 1126. Barbosa, V.L.
    et al.
    E.R., Schlosser
    Machado, Renato
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    F. G., Ferreira
    S. M., Tolfo
    M. V. T., Heckler
    Linear Array Design with Switched Beams for Wireless Communications Systems2015In: International Journal of Antennas and Propagation, ISSN 1687-5869, E-ISSN 1687-5877, Vol. 2015, article id 278160Article in journal (Refereed)
  • 1127.
    Bardici, Minavere
    Blekinge Institute of Technology, School of Management.
    ICT Design and Users’ Affect, Cognition and Creativity2010Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    This study set out to investigate how ICT design relates to users’ affect, cognition and creativity in task performance. More specifically, the intent is to highlight how ICT design can elicit positive effective states and enhance cognitive abilities, including creative thinking in task activity within distance learning. In addition to this is to emphasize the synergies between ICT design, affect, cognition, and creativity from as well theoretical as empirical perspectives. To achieve the objective of this study, a qualitative empirical method was used. A survey questionnaire was chosen as a collection data technique. As far as analysis is concerned, phenomenology analytic strategy was espoused to explore how the participants perceive the phenomenon under inquiry. As for theory, central themes were selected for review given the synergy between them and their implication for the topic. They include: ICT; design; ICT design aspects: aesthetics, functionality, and usability; affect and cognition; and creativity; as well as the synergies between these concepts. Key findings highlight the role of affective quality of ICT design aesthetics in eliciting positive affective states among users when they acquire and use new ICT products or services regardless of their motivational needs. Most users consider aesthetics, usability, and functionality as design aspects but they tend to differ in ranking them depending on how they emotionally perceive them. Simplicity in ICT design is perceived as pleasurable aesthetic value. Further, natural colors are favored most by ICT users and positively affect their emotions so do the other aesthetical features associated with computers, software graphics, and web design. Using ICT inspire users creativity in task performance through what design affective qualities induce as positive affect in them in addition to software usability and functionality depending on the user. There are some synergies between design aesthetics, affect, cognition, and creativity. Moreover, ICT design can, depending on additional factors, ease and help users’ to carry out complex task and if software applications are skillfully used, they can help stimulate users’ creativity in task performance because of the built-in capabilities that are intended to enhance cognitive and emotional abilities of users. In addition, users differ on the elements they focus on when interacting with ICT depending on their inclination. Human attentional capacity and intensity can play a role in creativity. Crystallization of creativity can be triggered when various ICT design elements are perceived in a useful way.

  • 1128.
    Bardici, Nick
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
    Skarin, Björn
    Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
    Röstigenkänning genom Hidden Markov Model: En implementering av teorin på DSP2006Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    This master degree project is how to implement a speech recognition system on a DSK – ADSP-BF533 EZ-KIT LITE REV 1.5 based on the theory of the Hidden Markov Model (HMM). The implementation is based on the theory in the master degree project Speech Recognition using Hidden Markov Model by Mikael Nilsson and Marcus Ejnarsson, MEE-01-27. The work accomplished in the project is by reference to the theory, implementing a MFCC, Mel Frequency Cepstrum Coefficient function, a training function, which creates Hidden Markov Models of specific utterances and a testing function, testing utterances on the models created by the training-function. These functions where first created in MatLab. Then the test-function where implemented on the DSK. An evaluation of the implementation is performed.

  • 1129.
    Barela, Krzysztof
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Ciereszko, Piotr
    Blekinge Institute of Technology, School of Engineering.
    Control System Design and Transmission Line Resonance Elimination of a 3-Phase Battery Charger2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This paper addresses two problems which may occur during the operation of a MTM-HF traction battery charger produced by the company MicroPower AB: Firstly, high-power traction battery chargers are chiefly supplied from rectified 3-phase mains electricity, making them susceptible to resonant disturbances which occur in high-inductance power lines. These resonant disturbances increase the amplitude disturbances of the rectified DC voltage supplied to the battery charger, thus interfering with its operation. A method to suppress the resonant disturbances was devised using the inherent capability of a battery charger to draw a controlled current from the power lines. Secondly, Battery chargers operating near their maximum current capabilities are strongly affected by the ripple of the rectified supply voltage. In order to fully use the power supply, a control system was designed which minimizes the effect of that ripple on output current while ensuring that the desired value of output current is reached. Both of these methods were successfully tested using a simulated model of the MicroPower MTM-HF battery charger.

  • 1130.
    Bark, Hanna
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Industrial Economics.
    Gatier, Markus
    Blekinge Institute of Technology, Faculty of Engineering, Department of Industrial Economics.
    Sandström, Linda
    Blekinge Institute of Technology, Faculty of Engineering, Department of Industrial Economics.
    Genusnormer i omvandling – en väg till jämställdhet?: En studie om hur mäns konstruktion av maskulinitet och femininitet påverkar jämställdhetsattityder på mansdominerade arbetsplatser2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Title: Gendernorms in transition – a road to gender equality? A study of how men’s construction of masculinity and femininity affects attitudes towards equality in workplaces dominated by men.

    Authors: Hanna Bark, Markus Gatier och Linda Sandström

    Advisor: Marie Aurell Department: School of Management, Blekinge Institute of Technology

    Course: Bachelor’s thesis in Business Administration, 15 credits.

    Purpose: The purpose of this study is to increase the knowledge and understanding of how men construct gender in male-dominated workplaces, and how this gender construction affects these men’s attitudes towards equal workplaces.

    Method: To achieve the purpose of the study, we have chosen to use a qualitative method where empirical data were gathered through conversation with men working in male-dominated workplaces. Suitable respondents were derived by a convenience sample, a sample where respondents were picked from a circle of our own acquaintances. Regarding the question of how men construct gender, the empirical data were analyzed through the lens of our theoretical framework, while the question of how the gender construction of these men can be linked to attitudes towards equal workplaces have been analyzed freely by examining given data.

    Results: This study has shown that men in male-dominated workplaces construct masculinity- and femininity norms out of each other opposites. The construction is made through some form of linguistic comparison as well as direct links towards what is considered to be masculine and feminine. A clear pattern is that strength is primarily linked to masculinity and sensitivity is primarily linked to femininity. Furthermore, the study has shown that the construction of one’s own masculinity is made both through comparing with other men, and also through a reconfiguration of the constructed masculinity norm. Regarding the later, it appears that the current norm of masculinity is considered to be inadequate, and that’s why it is reconfigured so that the definition of one’s own masculinity becomes a wider definition of the current norm of masculinity. The study has shown that the further to the left men is located in the scale of masculinity “rebellious – heroic/normal – heroic”, the greater the will and awareness these men possess to reconfigure norms of masculinity by adding what is normally considered to be feminine. Finally the study has shown that different kinds of masculinities affect attitudes towards equality. The study shows that the further to the left in the scale of masculinity “rebellious – heroic/normal – heroic” a man finds himself, it is more likely to exist attitudes that includes changing/challenging the current masculinity norm of the workplace, and all the more likely these attitudes can be considered to be system-changing attitudes of equality.

  • 1131.
    Bark, Sandra
    et al.
    Blekinge Institute of Technology, School of Management.
    Dahlén, Mats
    Blekinge Institute of Technology, School of Management.
    Hur ser chefer på generationsväxlingen: En kvalitativ studie om arbetet inom Landstinget Blekinge2013Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Syfte: Syftet med vår uppsats är att ta reda på hur Landstinget Blekinge arbetar med den generationsväxling som pågår och det svaga intresset hos den yngre generationen samt hur det faktiska arbetet med att vara en attraktiv arbetsgivare ser ut, både inom och utanför organisationen, för att undvika en brist på arbetskraft. Vidare vill vi även undersöka om den bild teorier framställer av den nya generationen skiljer sig mot uppfattningen som chefer inom Landstinget Blekinges har. Syftet är också att se hur väl Landstinget Blekinge arbetar med att bli en attraktiv arbetsgivare i jämförelse med SKL:s bild och därmed bidra till ökad medvetenhet kring arbetet med generationsväxlingen samt de utmaningar och svårigheter som kan finnas i samband med den. Metod: Undersökningen är baserad på en kvalitativ, abduktiv metod och semistrukturerade intervjuer med tre personalchefer, en förvaltningschef samt kommunikationsdirektören inom Landstinget Blekinge. Resultat: Våra resultat visar att Landstinget Blekinge har en skriftlig varumärkesstrategi för vad som behöver göras. För att lyckas attrahera den yngre generationen behöver de dock vidta ytterligare åtgärder för att lansera sin strategiska plan och börja det egentliga arbetet med employer branding om de vill bli en attraktiv arbetsgivare för den yngre generationen.

  • 1132.
    Barkan, Anna
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Gunnarsson, Daniel
    Blekinge Institute of Technology, School of Engineering.
    Postel, Olaf
    Blekinge Institute of Technology, School of Engineering.
    Strategic Sustainable Product Development: A Case of an SME in the Sealing Industry2010Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Product development is a crucial leverage point to move our society towards sustainability. The purpose of this study is to gain knowledge on how a selected strategic tool for sustainable product development (SPD), namely the Method for Sustainable Product Development (MSPD), can be adapted to integrate sustainability aspects into the Product Development Process (PDP) of an organization. A Small and Medium Sized Enterprise (SME) in the manufacturing industry with customers and office locations worldwide is used as a case study. A participatory action research approach is used throughout the study. It is shown in the case that the MSPD triggers thinking in product development by raising sustainability-related questions. In order to be answered most questions, however, require additional sustainability education in the organization and further investigation in long-term, company-wide projects, which the current PDP of the organization was not designed to provide. It was concluded that iterations of the process with the integrated MSPD tool and additional tools to supplement the MSPD are necessary to further move product development at the organization towards sustainability.

  • 1133. Barkan, Anna
    et al.
    Gunnarsson, Daniel
    Postel, Olaf
    Ny, Henrik
    Blekinge Institute of Technology, Faculty of Engineering, Department of Strategic Sustainable Development.
    Sustainable Product Development: A Case of an SME in the Sealing Industry2010Conference paper (Refereed)
    Abstract [en]

    In our study we provide a case study of implementing sustainability aspects into the product development process of a Small and Medium Enterprise (SME). The objective of the study is to, together with the company, co-create a product development process that represents a step towards sustainability. For this a tool called the Method for Sustainable Product Development (MSPD) is used. The methodology of the study includes mapping the current product development process in the organization, adapting the MSPD based on criteria set by the organization, implementing the MSPD into the product development process of the organization in a co-creative way and finally applying the new product development process to a test case within the organization. Various participatory action techniques including workshops and interviews are used to ensure co-creation of the results. It was found that raising questions on sustainability aspects in product development can be seen as a first step of an organizational move towards sustainability. With this the MSPD worked as intended. The practical application showed that further steps were necessary. Particularly additional education in sustainability and theinvolvement of entities in the organization external to the product development process were found as crucial next steps.

  • 1134.
    Barke, Daniel
    Blekinge Institute of Technology, School of Engineering, Department of Systems and Software Engineering.
    Are we ready for Agile Development?2009Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    In the rapidly changing market of today, companies need to be responsive and react quickly to changes in both their competitors’ behaviour but also to changes in their own technical environment. In this thesis I have examined the agile characteristics of a number of companies in Stockholm, with focus on three agile concepts; Scrum, eXtreme Programming and Test Driven Development. The work started off by a prestudy, in which I have identified the criteria that a company needs to fulfil in order to be considered agile. This resulted in four main categories of characteristics; Quality, Flexibility, Communication and Competence. After doing the prestudy, these characteristics were investigated through a combination of a quantitative study and a case study. While the results mostly lean towards agile behaviour rather than non agile, it was shown that a lot of work still remains, for instance regarding improvements in the communications area, and also in the way these companies apply the agile methodologies examined.

  • 1135.
    Barkerud, Jannice
    et al.
    Blekinge Institute of Technology, School of Health Science.
    Durmishi, Yllka
    Blekinge Institute of Technology, School of Health Science.
    Upplevelsen av att leva med multipel skleros: En litteraturstudie2011Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    I Sverige har drygt en person av 800 diagnosen multipel skleros (MS). Det är en livslång sjukdom som hela tiden progredierar och ger allt svårare symtom hos den drabbade. Detta medför att många personer med MS känner en uppgivenhet och riskerar att drabbas av depression eftersom MS är svår att förutse. Detta kan inverka på individens livsvärld, lidande och välbefinnande samt den subjektiva kroppen. Syftet med studien var att belysa upplevelsen av att leva med multipel skleros. Metoden som valdes till denna studie var en litteraturstudie med kvalitativ ansats där två självbiografiska böcker, skrivna av två kvinnor, inkluderades. En innehållsanalys inspirerad av Graneheim och Lundmans (2004) tolkning av innehållsanalys utfördes. Under analysen framkom fyra kategorier, de benämndes: ”emotionella förändringar”, ”framtidstro”, ”förlora kontrollen över kroppen” samt ”identifiering och acceptans”. Slutsatsen visade att individer som drabbas av MS förlorar kontrollen över livet, vilket förändrar livsvärlden. Genom att belysa upplevelsen av att leva med MS kan sjuksköterskan få bättre förståelse för vad individen går igenom. Ökad förståelse av upplevelser av att leva med MS kan främja omvårdnaden så att individen kan känna välbefinnande trots lidande.

  • 1136.
    Barnekow, Carl-Henrik
    Blekinge Institute of Technology, School of Planning and Media Design.
    Can Tourism Boost Development of Sustainable Infrastructure in Nepal?2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    The purpose of this work is to analyse both the existing planning system in Nepal and how tourism affects the local indigenous population. Furthermore it will try to understand how tourism can be used for poverty alleviation and sustainable development of infrastructure through planning. A study of planning theory has been interspersed with studies of the concept of sustainable development, planning, tourism, and infrastructure while and trying to find linkages between the fields of knowledge. Informal planning is a key function that occurs when the existing planning does not work. Can this form of planning be adapted and accepted as the official planning? Through case studies in three different locations in the Kaski district in Nepal the theoretical framework has been used to analyse how tourism is used and how planning works. The areas were all chosen because of their different preconditions and location. The study analysis both urban and rural areas, which have different challenges when working with achieving sustainable development. The result of the studies shows on a possible connection between sustainable development and infrastructure with tourism as an engine in Nepal. Through studies of literature focusing on planning challenges in Africa knowledge was extracted that could be used and adapted to local conditions in Nepal. But the studies also found grave problems with the existing planning system in Nepal - it is not working as the local administration is not capable of fulfilling its’ responsibilities towards the local population. If tourism is to be used for creating sustainable development in Nepal the regulatory and administrative system has to be adapted to the local context.

  • 1137.
    Barnekow, Carl-Henrik
    Blekinge Institute of Technology, School of Technoculture, Humanities and Planning.
    Hattholmen: en stadsdelsförvandling i Karlskrona2008Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Karlskrona är unikt i Sverige genom sin geografiska placering i kustlandskapet med de begränsningar det ger för framtida utvidgningar. Centrala Trossö ligger i en ände av staden och under flera århundraden har staden bara kunnat växa in över land. När många städer pratar om stadsformer som ”rund stad” och ”bandstad” har Karlskrona en form av ”tårtbitsstad” med centrum i spetsen och resten av staden i nordöstlig riktning. Staden strävar efter att behålla Trossö som centrum, men har idag problem med att allt fler bor längre och längre från ön. Genom att det geografiska läget är som det är råder det idag brist på utrymme för staden att växa med ny bebyggelse nära centrum, medan vissa industriområden ligger väldigt centralt. Dessa områden kan omvandlas till bostadsområden och de förutsättningar som behövs för att staden skall kunna växa med en tät och hållbar stadsbebyggelse kan skapas. Arbetet har tagit fram ett förslag på hur en framtida stadsbebyggelse på ett centralt industriområde, Hattholmen, kan utformas. För att stärka förslaget har en Space Syntax-analys gjorts över centrala delarna av Karlskrona tillsammans med andra studenter i kursen Stadsanalys på Blekinge Tekniska Högskola under vårterminen 2008. Analysen visar hur svagt integrerat nordöstra Trossö är med resterande delar av centrum. Analysresultatet har tillsammans med inventeringar av det tänkta arbetsområdet varit grund för det framtagna förslaget. Med god utvecklad stadsbebyggelse på Hattholmen växer Karlskrona med en ny stadsdel nära centrum. Förutsättningar för nya allmänna mötesplatser, promenadstråk och parker skapas både i Handelshamnen och på Hattholmen. Genom en bro över Handelsfjärden knyts den nya stadsdelen direkt till centrala Karlskrona och nya attraktiva bostäder på gångavstånd från Trossö. Torgbildningar och parker kan naturligt placeras vid brons landfästen, allt medan staden underlättar och främjar ett miljövänligt rörelsemönster och förstärker stadens kulturhistoriska värden genom den starka kontakten med havet. Efter att förslagets tagits fram har en Space Syntax-analys gjorts med förslaget som grund för att visa hur dess inverkan blir på stadsstrukturen omkring sig. Analysen visar tydligrationen ökar för Handelshamnen omen och stärker nordöstra Trossö.

  • 1138. Barney, Sebastian
    Perspectives on Software and their Priorities: Balancing Conflicting Stakeholder Views2009Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The sustainable development of a software product depends on a number of groups working together to achieve a common goal. However, each of the groups interacts with the product in different ways, and can have conflicting aims and objectives. For example, developers trying to correct issues in the software architecture, which will impact future releases of the product, can be stopped by a project manager who is charged with delivering a release on time and within budget. While the functional requirements of a software product are usually documented, there are a number of other investments in software development that are not always as explicitly agreed upon but are still essential to a product's long-term success. The major investment types include software product quality -- a main control variable in software development, and intellectual capital (IC) -- being the key input and tool used in software development. As management requires measurement, it is necessary understand the priorities placed on investment options by the various groups involved in the development of a software product. The objective of this thesis is to develop a method capable of both determining the priorities of different groups, and the level of alignment between these groups in terms of their priorities. Evolving the method from a study into the values used to select requirements for a release of software, Ericsson supported the development of a methodology to determine and compare the priorities of different groups for software product quality, and IC. The method elicited the required information from a series of case studies to build up a picture of the priorities placed on major investment options and constraints -- features, quality, IC, time and cost. The results highlight strengths, and areas for improvement -- through the identification of differing priorities and ambiguities in management of different aspects studied. In conducting this research, systematic biases in the selection of requirements appear to be occurring, adding an objective to understand how bias impacts decision making in a requirements engineering context. This thesis provides a method that determines the priorities on the level of investment on different options in the development of software products. It is concluded that people involved in the development of software need to be aligned on issues of software product quality as these priorities set expectations. The same was not found true for issues of IC, where groups can complete tasks without negatively impacting others, as long as the organisation works effectively as a single entity. On the issue of biases in the prioritisation of these aspects, prospect theory is found to apply to requirements selection in an academic experiment -- suggesting people will prefer functionality over software product quality, and to meet the known requirements of customers over predicting general market requirements.

  • 1139. Barney, Sebastian
    Software Quality Alignment: Evaluation and Understanding2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Background: The software development environment is growing increasingly complex, with a greater diversity of stakeholders involved in product development. Moves towards global software development with onshoring, offshoring, insourcing and outsourcing have seen a range of stakeholders introduced to the software development process, each with their own incentives and understanding of their product. These differences between the stakeholders can be especially problematic with regard to aspects of software quality. The aspects are often not clearly and explicitly defined for a product, but still essential for its long-term sustainability. Research shows that software projects are more likely to succeed when the stakeholders share a common understanding of software quality. Objectives: This thesis has two main objectives. The first is to develop a method to determine the level of alignment between stakeholders with regard to the priority given to aspects of software quality. Given the ability to understand the levels of alignment between stakeholders, the second objective is to identify factors that support and impair this alignment. Both the method and the identified factors will help software development organisations create work environments that are better able to foster a common set of priorities with respect to software quality. Method: The primary research method employed throughout this thesis is case study research. In total, six case studies are presented, all conducted in large or multinational companies. A range of data collection techniques have been used, including questionnaires, semi-structured interviews and workshops. Results: A method to determine the level of alignment between stakeholders on the priority given to aspects of software quality is presented—the Stakeholder Alignment Assessment Method for Software Quality (SAAM-SQ). It is developed by drawing upon a systematic literature review and the experience of conducting a related case study. The method is then refined and extended through the experience gained from its repeated application in a series of case studies. These case studies are further used to identify factors that support and impair alignment in a range of different software development contexts. The contexts studied include onshore insourcing, onshore outsourcing, offshore insourcing and offshore outsourcing. Conclusion: SAAM-SQ is found to be robust, being successfully applied to case studies covering a range of different software development contexts. The factors identified from the case studies as supporting or impairing alignment confirm and extend research in the global software development domain.

  • 1140. Barney, Sebastian
    et al.
    Aurum, Aybüke
    Hu, Ganglan
    Wohlin, Claes
    Creating Software Product Value in China2009In: IEEE Software, ISSN 0740-7459 , Vol. 26, no 4Article in journal (Refereed)
    Abstract [en]

    China has become a formidable player and continues to grow strongly in what has become a dynamic global market for software development. In this highly competitive environment it has never been more difficult or important to maximize the creation of software product value. But each key stakeholder group – purchasers, users, software managers and developers – has a different notion of value when looking at a software product. As the value of a software product is largely derived through the requirements it fulfils, we looked at the criteria used to select and prioritise requirements for a release of software, and the perspectives that motivate them. The value of a software product is largely derived through the requirements it fulfils. To help understand how value is created we looked at the criteria used to select and prioritise requirements for a release of software, and the perspectives that motivate them. We studied three groups of software development companies operating in China – Chinese companies with a domestic market, Chinese companies with an international market, and western companies operating in China. The results were similar for all three groups, except After-sales Support was a significantly greater concern for Chinese companies with an international market.

  • 1141. Barney, Sebastian
    et al.
    Aurum, Aybüke
    Wohlin, Claes
    A Product Management Challenge: Creating Software Product Value through Requirements Selection2008In: Journal of systems architecture, ISSN 1383-7621, E-ISSN 1873-6165, Vol. 54, no 6, p. 576-593Article in journal (Refereed)
    Abstract [en]

    It is important for a software company to maximize value creation for a given investment. The purpose of requirements engineering activities is to add business value that is accounted for in terms of return on investment of a software product. This paper provides insight into the release planning processes used in the software industry to create software product value, by presenting three case studies. It examines how IT professionals perceive value creation through requirements engineering and how the release planning process is conducted to create software product value. It also presents to what degree the major stakeholders' perspectives are represented in the decision-making process. Our findings show that the client and market base of the software product represents the most influential group in the decision to implement specific requirements. This is reflected both in terms of deciding the processes followed and the decision-making criteria applied when selecting requirements for the product. Furthermore, the management of software product value is dependant on the context in which the product exists. Factors, such as the maturity of the product, the marketplace in which it exists, and the development tools and methods available, influence the criteria that decide whether a requirement is included in a specific project or release.

  • 1142. Barney, Sebastian
    et al.
    Aurum, Aybüke
    Wohlin, Claes
    A product management challenge: Creating software product value through requirements selection2008Conference paper (Refereed)
    Abstract [en]

    It is important for a software company to maximize value creation for a given investment. The purpose of requirements engineering activities is to add business value that is accounted for in terms of return on investment of a software product. This paper provides insight into the release planning processes used in the software industry to create software product value, by presenting three case studies. It examines how IT professionals perceive value creation through requirements engineering and how the release planning process is conducted to create software product value. It also presents to what degree the major stakeholders' perspectives are represented in the decision-making process. Our findings show that the client and market base of the software product represents the most influential group in the decision to implement specific requirements. This is reflected both in terms of deciding the processes followed and the decision-making criteria applied when selecting requirements for the product. Furthermore, the management of software product value is dependant on the context in which the product exists. Factors, such as the maturity of the product, the marketplace in which it exists, and the development tools and methods available, influence the criteria that decide whether a requirement is included in a specific project or release. (C) 2007 Elsevier B.V. All rights reserved.

  • 1143. Barney, Sebastian
    et al.
    Aurum, Aybüke
    Wohlin, Claes
    Quest for a Silver Bullet: Creating Software Product Value through Requirements Selection2006Conference paper (Refereed)
  • 1144. Barney, Sebastian
    et al.
    Aurum, Aybüke
    Wohlin, Claes
    The Relative Importance of Aspects of Intellectual Capital for Software Companies2009Conference paper (Refereed)
    Abstract [en]

    Intellectual capital (IC) is both the key input and tool used in the development of software today. It covers the value provided to an organisation by the employees, the processes and products that support the organisation, and the knowledge held in the relationships between the organisation and external parties – covering human capital, structural capital, and relationship capital respectively. This paper presents a method that seeks to understand the level of alignment between the different success-critical stakeholders in the importance of different aspects of intellectual capital. The method is applied in a case study and provides a number of interesting insights, with the authors concluding that the groups do not necessarily need to be aligned as each groups has a different informational role within the organisation to fulfil.

  • 1145.
    Barney, Sebastian
    et al.
    Blekinge Institute of Technology, School of Computing.
    Khurum, Mahvish
    Blekinge Institute of Technology, School of Computing.
    Petersen, Kai
    Blekinge Institute of Technology, School of Computing.
    Unterkalmsteiner, Michael
    Blekinge Institute of Technology, School of Computing.
    jabangwe, Ronald
    Blekinge Institute of Technology, School of Computing.
    Improving Students With Rubric-Based Self-Assessment and Oral Feedback2012In: IEEE Transactions on Education, ISSN 0018-9359, Vol. 55, no 3, p. 319-325Article in journal (Refereed)
    Abstract [en]

    Rubrics and oral feedback are approaches to help students improve performance and meet learning outcomes. However, their effect on the actual improvement achieved is inconclusive. This paper evaluates the effect of rubrics and oral feedback on student learning outcomes. An experiment was conducted in a software engineering course on requirements engineering, using the two approaches in course assignments. Both approaches led to statistically significant improvements, though no material improvement (i.e., a change by more than one grade) was achieved. The rubrics led to a significant decrease in the number of complaints and questions regarding grades.

  • 1146.
    Barney, Sebastian
    et al.
    Blekinge Institute of Technology, School of Computing.
    Mohankumar, Varun
    Chatzipetrou, Panagiota
    Aurum, Aybüke
    Wohlin, Claes
    Blekinge Institute of Technology, School of Computing.
    Angelis, Lefteris
    Software quality across borders: Three case studies on company internal alignment2014In: Information and Software Technology, ISSN 0950-5849, E-ISSN 1873-6025, Vol. 56, no 1, p. 20-38Article in journal (Refereed)
    Abstract [en]

    Software quality issues are commonly reported when offshoring software development. Value-based software engineering addresses this by ensuring key stakeholders have a common understanding of quality. Objective: This work seeks to understand the levels of alignment between key stakeholder groups within a company on the priority given to aspects of software quality developed as part of an offshoring relationship. Furthermore, the study aims to identify factors impacting the levels of alignment identified. Method: Three case studies were conducted, with representatives of key stakeholder groups ranking aspects of software quality in a hierarchical cumulative exercise. The results are analysed using Spearman rank correlation coefficients and inertia. The results were discussed with the groups to gain a deeper understanding of the issues impacting alignment. Results: Various levels of alignment were found between the various groups. The reasons for misalignment were found to include cultural factors, control of quality in the development process, short-term versus long-term orientations, understanding of cost-benefits of quality improvements, communication and coordination. Conclusions: The factors that negatively affect alignment can vary greatly between different cases. The work emphasises the need for greater support to align company internal success-critical stakeholder groups in their understanding of quality when offshoring software development.

  • 1147.
    Barney, Sebastian
    et al.
    Blekinge Institute of Technology, School of Computing.
    Petersen, Kai
    Blekinge Institute of Technology, School of Computing.
    Svahnberg, Mikael
    Blekinge Institute of Technology, School of Computing.
    Aurum, Aybueke
    Barney, Hamish
    Software quality trade-offs: A systematic map2012In: Information and Software Technology, ISSN 0950-5849, E-ISSN 1873-6025, Vol. 54, no 7, p. 651-662Article, review/survey (Refereed)
    Abstract [en]

    Background: Software quality is complex with over investment, under investment and the interplay between aspects often being overlooked as many researchers aim to advance individual aspects of software quality. Aim: This paper aims to provide a consolidated overview the literature that addresses trade-offs between aspects of software product quality. Method: A systematic literature map is employed to provide an overview of software quality trade-off literature in general. Specific analysis is also done of empirical literature addressing the topic. Results: The results show a wide range of solution proposals being considered. However, there is insufficient empirical evidence to adequately evaluate and compare these proposals. Further a very large vocabulary has been found to describe software quality. Conclusion: Greater empirical research is required to sufficiently evaluate and compare the wide range of solution proposals. This will allow researchers to focus on the proposals showing greater signs of success and better support industrial practitioners.

  • 1148. Barney, Sebastian
    et al.
    Wohlin, Claes
    Alignment of Software Product Quality Goals in Two Outsourcing Relationships2010Conference paper (Refereed)
    Abstract [en]

    Background: Issues with software product quality are commonly reported when organisations engage in outsourcing relationships. To address this issue, value-based software engineering literature emphasises the need for all success-critical stakeholder groups to work towards a mutually agreed goal. Aim: This paper presents a case study that aims to compare and contrast the priority two groups place on software product quality — stakeholders internal to the development organisation, and stakeholders from outsourcing relationships. Method: A model of software product quality was developed and used for this study based on ISO 9126 standard. Questionnaires were collected from 38 representatives of the two key stakeholder groups, in which each person rates the relative importance of aspects of software product quality using the hierarchical cumulative voting (HCV) technique. The results of these two groups were then analysed and compared. Results: The results show the stakeholders priorities to be a merging of the priorities from both the software development organsiation, and the firm providing the outsourced services. Further, stakeholders from outsourced relationships had greater difficulty define an ideal future balance of software product qualities. Conclusions: One of the keys to success when outsourcing is to ensure both the internal and external groups understand the needs of each other — and ensure they can work towards a sufficiently compatible goal. It may be necessary to change the way work is outsourced to align the goals of both firms to be compatible.

  • 1149. Barney, Sebastian
    et al.
    Wohlin, Claes
    Software Product Quality: Ensuring a Common Goal2009Conference paper (Refereed)
    Abstract [en]

    Software qualities are in many cases tacit and hard to measure. Thus, there is a potential risk that they get lower priority than deadlines, cost and functionality. Yet software qualities impact customers, profits and even developer efficiency. This paper presents a method to evaluate the priority of software qualities in an industrial context. The method is applied in an exploratory case study, where the ISO 9126 model for software quality is combined with Theory-W to create a process for evaluating the alignment between success- critical stakeholder groups in the area of software product quality. The results of the case study using this tool is then presented and discussed. It is shown that the method provides valuable information about software qualities.

  • 1150. Barney, Sebastian
    et al.
    Wohlin, Claes
    Aurum, Aybüke
    Balancing Software Product Investments2009Conference paper (Refereed)
    Abstract [en]

    The long-term sustainability of a software product depends on more than developing features. Priorities are placed on aspects that support the development of software, like software product quality (eg. ISO 9126), project constraints -- time and cost, and even the development of intellectual capital (IC). A greater focus on any one aspect takes priority from another, but as each aspects delivers a different type of value managers have trouble comparing and balancing these aspects. This paper presents a method to help determine the balance between key priorities in the software development process. The method is applied to a new case study, that also combines with results from previous studies. The results show it is possible to compare features, quality, time, cost and IC in a comprehensive way, with the case study showing that participants perceive a change from a shorter-term product perspective to a longer-term organisation beneficial to the business.

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