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  • 13551.
    Yousefi, Erfan
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Farhat, Nasrin
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Antenna Performance Software2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Antenna performance software is a tool to measure the quality and enactment of the newly developed products. This is an important matter to the development department of the company since the products must be verified to work with regarding to the user specifications.

    Using LabView, this tool has been developed in order to provide ease for this test. This software has been compared with previous solutions given and has been optimized to be able to do the tests successfully. 

  • 13552.
    Yousefi, Parisa
    et al.
    Blekinge Institute of Technology, School of Computing.
    Yousefi, Pegah
    Blekinge Institute of Technology, School of Computing.
    Cost Justifying Usability a case-study at Ericsson2011Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    In this study we investigate the level of usability and usability issues and the gaps concerning usability activities and the potential users, in a part of charging system products in Ericsson.Also we try identifying the cost-benefit factors, usability brings to this project, in order to attempt 'justifying the cost of usability for this particular product'.

  • 13553.
    Yousuf, Kamran
    Blekinge Institute of Technology, School of Computing.
    Time controlled network traffic shaper2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Network performance metrics such as delay variations and packet loss influence the performance of the network. As a consequence, the performance of applications on the network is also affected as most of the networked applications existing today are very much sensitive to the network performance. Therefore it is of utmost importance to test the intensity of such network level disturbances on the performance of applications. A network traffic shaper/emulator shapes the network traffic in terms of these performance metrics to test such applications in a controlled environment. Most of the traffic shapers existing today give the instantaneous step transition in delay and packet loss on network. In this work, we present time-controlled network traffic shaper, a tool that facilitates testing and experimentation of network traffic through emulation. It focuses on time variant behavior of the traffic shaper. A linear transition of delay and packet loss that is varying with respect to time may fits much better to the real network scenarios instead of an instantaneous step transition in delay and packet loss. This work illustrates the emulation capabilities of time-controlled network traffic shaper and presents its design architecture. Several approaches are analyzed to do the task and one of them is followed to develop the desired architecture of the shaper. The shaper is implemented in a small scenario and is tested to see whether the desired output is achieved or not. The shortfalls in the design of the shaper are also discussed. Results are presented that show the output from the shaper in graphical form. Although the current implementation of the shaper does not provide linear or exponential output but this can be achieved by implementing a configuration setting that is comprised of small transition values that are varying with respect to very small step sizes of time e.g. transitions on milli seconds or micro seconds. The current implementation of the shaper configuration provides the output with a transition of one milli second on every next second.

  • 13554.
    Yu, Jhang Shih
    Blekinge Institute of Technology, School of Engineering.
    Optimal Power Control in Cognitive Radio Networks with Fuzzy Logic2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In this thesis, we consider a pair of primary link (PU link) and a pair of cognitive link (CR link) in a fading channel. The PU link and CR link share spectrum simultaneously with different priorities, establishing the spectrum sharing network. The PU link has a higher priority to utilize spectrum with respect to the CR link. A desired quality of service (QoS) is given as a threshold on the PU link when it utilizes spectrum. The CR link utilizes spectrum only when the PU link is assured with the desired QoS or recognized as idle, not utilizing spectrum. Under this constraint, the CR link utilizes spectrum with an opportunistic power scale to assure the desired QoS on the PU link. To optimize the spectrum usage, we propose a fuzzy-based optimal power control strategy for the CR link using Mamdani fuzzy control. With the proposed control strategy, the CR link can estimate an optimal power scale for the spectrum sharing network.To illustrate the proposed fuzzy-based optimal power control strategy and its advantages, we approach the spectrum sharing network in two different propagation environments: without path loss and with path loss. In the propagation environment without path loss, we assume all channel state information (CSI) on each transmission side is available to the others, including the PU’s signal-to-noise (PU’s SNR) and PU’s interference channel gain . These two variables are used as fuzzy antecedents to estimate a corresponding power scale. In the propagation environment with path loss, we analyze the spectrum sharing network from the geometric point of view. We assume all CSI on each side is available to the others, including the PU’s SNR, PU’s interference channel gain and relative distance is fixed and normalized to 1, we use PU’s SNR and relative distance as fuzzy antecedents to calculate a corresponding power scale.

  • 13555.
    Yu, Liang
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Alégroth, Emil
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Chatzipetrou, Panagiota
    Örebro universitet, SWE.
    Gorschek, Tony
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Utilising CI environment for efficient and effective testing of NFRs2020In: Information and Software Technology, ISSN 0950-5849, E-ISSN 1873-6025, Vol. 117, article id 106199Article in journal (Refereed)
    Abstract [en]

    Context: Continuous integration (CI) is a practice that aims to continuously verify quality aspects of a software intensive system both for functional and non-functional requirements (NFRs). Functional requirements are the inputs of development and can be tested in isolation, utilising either manual or automated tests. In contrast, some NFRs are difficult to test without functionality, for NFRs are often aspects of functionality and express quality aspects. Lacking this testability attribute makes NFR testing complicated and, therefore, underrepresented in industrial practice. However, the emergence of CI has radically affected software development and created new avenues for software quality evaluation and quality information acquisition. Research has, consequently, been devoted to the utilisation of this additional information for more efficient and effective NFR verification. Objective: We aim to identify the state-of-the-art of utilising the CI environment for NFR testing, hereinafter referred to as CI-NFR testing. Method: Through rigorous selection, from an initial set of 747 papers, we identified 47 papers that describe how NFRs are tested in a CI environment. Evidence-based analysis, through coding, is performed on the identified papers in this SLR. Results: Firstly, ten CI approaches are described by the papers selected, each describing different tools and nine different NFRs where reported to be tested. Secondly, although possible, CI-NFR testing is associated with eight challenges that adversely affect its adoption. Thirdly, the identified CI-NFR testing processes are tool-driven, but there is a lack of NFR testing tools that can be used in the CI environment. Finally, we proposed a CI framework for NFRs testing. Conclusion: A synthesised CI framework is proposed for testing various NFRs, and associated CI tools are also mapped. This contribution is valuable as results of the study also show that CI-NFR testing can help improve the quality of NFR testing in practices. © 2019

  • 13556. Yu, Liang
    et al.
    Guerra, Clemente
    Exploring the disruptive power of adopting DevOps for software development2019Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • 13557.
    Yu, Miao
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Huang, Nanhai
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Optimization of the Signal Horn Performance2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This thesis studies the parameters that affect the sound level of signalhorns in a passenger car. The project is performed on the behalf of VolvoCars Group. Physical testing was done on Volvo S90 with and withoutmodifications. During the project, the influence of installation, frequencysignature of horns and system parameters on sound pressure wereinvestigated. Acoustic measurements were performed in semi anechoicchamber and open site using the setup specified by ECE R28 document.

  • 13558.
    Yu, Miao
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering. Shanghai Second Polytechnic University.
    Huang, Nanhai
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering. Shanghai Second Polytechnic University.
    Xu, Qianxin
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering. Shanghai Second Polytechnic University.
    Multi-functional adjustable table for people staying longer time in bed due to disability2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This product presents the design of a useful multi-functional adjustable table. It will bring great convenience to people with disability who spend most of time in bed, so as to meet their daily needs.

    Since there are already many similar products on the market, we focused on updating the functions on table, which can help people reading books or using tablet PC on beds in a comfortable way. It can also support people to stand up and walk around. There is a C-clamp fixing the product consolidated to bed. Besides, the hydraulic and micro-computer systems are used to adjust the table into a proper height automatically.

    The whole structure was designed in Autodesk Inventor 2015, and the simulation, test, analysis experiments were made in Abaqus 6.1.2 to ensure its safety and stability.

    In addition, this design can be an incentive for the improvement of the auxiliary equipment, highlighting the importance of the development of mechanisms for the healthcare.

  • 13559.
    Yu, Mingyue
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Lu, Yixuan
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Designing of A Pneumatic Cushion for Supporting Standing and Sitting Process2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    As is known to all, the aging problem becomes more and more serious in recent years. The issues “get into and out of a chair”, from one of the self-care tasks of aging people named Functional mobility in ADLs (Activity of daily livings), need to be solved carefully in efficient ways to help seniors and patients who have physical problems dealing with their daily life.

    In this previous investigation, the existing products in the market are normally quite heavy and importable. After combined with the advantages of the existing products and some improvements in portability and comfort which is related to human engineering. A Pneumatic Cushion for Supporting Standing and Sitting Process, based on airbag and pneumatic system which has been designed in this thesis, can be used by user who has physical-trouble for standing up and sitting down. Meanwhile, after being assembled with some specific extra components, it can be used as a mobility aid device.

    For the whole designing process, many relevant article, video sources and websites are referred for the previous researches, including Google Scholar, BTH Digital Library and YouTube. The product was designed and analysed in Inventor 2018 and the fluid dynamic simulation has been done in Abaqus. Studies involved lifting function are selected after the survey about assist appliance and aid appliance market.

  • 13560.
    Yu, Yanjun
    et al.
    Blekinge Institute of Technology, School of Management.
    Pena, Carlos Alberto Rodriguez
    Blekinge Institute of Technology, School of Management.
    The Pros and Cons of Business Intuition in Strategic Decision Making2006Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    The purpose of this research is to inform business people, especially managers and executives who are facing strategic decision making the benefits and risks of relying on intuition. Hence, they can have a clear mind about to what extend they can trust their intuitions. After reviewing briefly the history of the development of intuition concept and the main ideas of strategic decision making, we have conducted a thorough research about this topic from the following ten aspects: availability, timing, efficiency, flexibility, synthesis, accuracy or effectiveness, reliability, security, storage, and transferring.

  • 13561.
    Yuan, Hongxiang
    Blekinge Institute of Technology, Faculty of Engineering, Department of Spatial Planning.
    Urban Nightscape and Nightscape Lighting Analysis and Evaluations on Typical Nightscape Cases in Nanjing2014Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    A city’s nightscape can be treated as a re-introduction of the city during the night. Due to the development of city economy and citizens’ leisure life, people are paying more attention to their nightlife. With appropriate lighting design and illumination systems, a city can draw very impressive pictures as its ‘identification card’ to the whole world. Recently, more and more Chinese cities have also started to attach importance to nightscape. Beijing, Shanghai, Guangzhou and Hongkong, as the biggest Chinese cities, have already made notable progress since 1980s. This leads more and more Chinese cities put nightscape design into their urban planning and urban design process. However, as a new subject, nightscape is usually treated as a topic which belongs to urban planning or illumination technology. Few of the recent studies on nightscape in China are done from the scope of urban design. Due to the lack of multidisciplinary studies on nightscape, some Chinese cities mistreated nightscape as simply lighting the urban spaces up with bright lights. This misunderstanding brings up a nightscape fever and makes some Chinese cities jump into a brightness competition. This thesis aims to make some contributions for the studies on nightscape from the scope of urban design. To achieve that aim, this thesis has three main research questions: 1. How could a typology of nightscape in Chinese cities be constructed based on available literature and the practical situation in Nanjing? 2. What are the strongpoints and shortcomings of the nightscape in the chosen cases in Nanjing? 3. This paper sets out to address a series of strategies in nightscape design which can be applied in different types of urban public spaces in Chinese cities. The final goal of this thesis is to achieve a series of strategies about urban public spaces’ nightscape design. This thesis studies on the available literatures and Chinese official documents about urban nightscape to make a conclusion of the definition of nightscape. A typology of nightscape in Chinese cities is constructed by combining existing theories about urban open spaces with municipal regulations about nightscape lighting in Nanjing. This thesis uses graphic analysis, urban night space evaluations and interviews to figure out the strongpoints and shortcomings of the nightscape in the chosen cases in Nanjing. And at last, a series of strategies are addressed for the future nightscape designs based on the theoretical studies and sites analyses.

  • 13562.
    Yuan, Tianci
    Blekinge Institute of Technology, School of Planning and Media Design.
    Landscape Planning of Urban Lake Park in China A case study on Nanjing2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Urban public spaces have always played an important part in urban development process. In this paper, a redesign proposal of Xuanwu Lake Park in Nanjing, China, will be made. This urban lake park is a symbol of the city and has a very long history. I want to make it as an attractive and ecological city public park which can combine human and natural environments together, so that it will be an enjoyable place for both tourists and inhabitants in Nanjing city. I will reconstruct the lake-ring roads and islands inside the lake based on Amos Rapoport and Stephen R Kellert’s ideas. Rapoport argues that users are more important than designers in the design project, because whether the designed place is good or not depends on users’ perspectives through their use and evaluation. Kellert argues that the human built environments cannot exist independent of the natural environments. If you design a place based on this idea, you can construct a harmonious environment. However, if you do not, it will cause damage to the environment. From this perspective, the human-nature environment should be connected together in design work. Therefore, in my redesign project, I will emphasize the role of the users. I will also combine man-made environments and nature environments together to make the park more balanced and attractive. I developed a set of color guidelines to help me to analyze the presence and use of different elements in Xuanwu Lake Park. From my analysis of the color elements in Xuanwu Lake Park, I found users’ and designers’ opinions for each element of the lake-ring roads and islands inside the lake. Then, I start my new design proposal of Xuanwu Lake Park in details to make it as a successful city park combine users, designers and human-nature environment together. My design proposal for Xuanwu Lake Park also gives an example to other historical and cultural urban lake parks.

  • 13563. Yuan, Z.
    et al.
    Wang, L.
    Meng, C.
    Duong, Quang Trung
    Shu, Lei
    Analysis on capacity and delay for redundant multiple source routing in mobile ad hoc networks2010Conference paper (Refereed)
    Abstract [en]

    We consider the realtime services over on-demand routing protocols in ad hoc networks, where infrastructure does not exist and the network topology is highly dynamic and time-varying due to node mobilities. To reduce the end-to-end delay, we have proposed two efficient routing protocols: MSR (Multipath Source Routing) and RSR (Redundant Source Routing) in our previous work. Simulations have shown the good performance for the realtime services. Moreover, we also propose a new on-demand routing protocol RMSR (Redundant Multipath Source Routing) and show the performance of RMSR, which is an extension of MSR and RSR. The performance of the network using the RMSR algorithm in terms of network capacity and end-to-end queuing delay is analyzed by computing the number of active links. Compared with DSR, we can figure out the network capacity which is not increased by redundant packets and improve network delay from O(N) to O(log N) (where N is the number of the nodes).

  • 13564. Yuen, Chau
    et al.
    Elkashlan, Maged
    Qian, Yi
    Duong, Trung Q.
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems.
    Shu, Lei
    Schmidt, Frank
    ENERGY HARVESTING COMMUNICATIONS: PART III2015In: IEEE Communications Magazine, ISSN 0163-6804, E-ISSN 1558-1896, Vol. 53, no 8, p. 90-91Article in journal (Other academic)
  • 13565.
    Yuqi, Yao
    Blekinge Institute of Technology, School of Management.
    Business Plan Design for Xinmade.com2012Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Xinmade.Com is a platform which based on the crowd sourcing and focused on the product development system. The aim is to help the individual or personal user to transfer the creative ideas to commercial goods, experiencing the creativity. With many people of different roles of investor, customers and idea owner, a project initiator publishes ideas on Xinmade.com. Then the good idea will be developed to a new project after evaluation. Redesign and research will start along with the capital support from investors during the develop process. The aim of online Shop on xinemade.com is to finish the presales process after the product gets the minimum order. Students and young women will be our major customers thus most of promotion should be focus on them. Our products must be full of passion, fashion and outstanding elements. Also these points should be highlighted in our promotions in order to attract our target customers who have particular lifestyle, personality and other values.

  • 13566.
    Yusuf, Adewale
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Challenges associated with effective task execution in a Virtual Learning Environment: A case study of Graduate Students of a University2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Context: In recent years, more and more people have started showing an increasing interest in distance or web-based education. Some of the reasons for this are the improvement in information and communication technology, as well as advancement in computer networking infrastructures. However, although computer technology has played an important role for the development of distance learning management systems, the underlying goal of such systems is the delivery of competitive and qualitative education via the distance learning environment. There have been a number of research studies and investigations in the field of Computer supported collaborative learning. This particular study is focused on the challenges associated with task execution in a distance learning environment as perceived by graduate students at a university.

    Objectives: The main focus or rationale behind this study is to investigate the importance of computer mediated communication tools in a virtual learning environment, as well as the problems facing the teachers or facilitators in their attempt to help learners (students) in the process of task execution, and towards achieving the learning goals in a web-based learning system.

    Methods: The author has adopted a qualitative case study approach. Questionnaires were sent out to some of the graduate students of BTH that participated in the online course under investigation, “Work integrated e-learning”, and some of these students were interviewed as well. Interviews were also conducted with two professors of Informatics and active researchers in distributed or e-learning in a University in Sweden that has had many years of experience in providing distance learning education. The empirical material was then analyzed, using cultural historical activity theory (CHAT) as a theoretical framework

    Results: The results indicate that more communication and collaborative interaction is needed in the context of the studied e-learning management system. The students expected the provision of more video communication through the learning platform. Furthermore, the results show that the learning in the studied web-based environment is centered on the students. 

    Conclusions: The author concludes that in order to diminish the gap that exists between face-to-face learning/teaching and an e-learning environment, there is a need for the designers and facilitators of the e-learning management system to make this platform more interactive. Additionally, the author concludes that the concept of Open start free pace (OSFP) or strict deadlines may need to be introduced into distance learning education in order to solve the challenges facing the teachers and facilitators.  

     

  • 13567.
    Yves, Hawa
    Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
    A Study of Fast Backprojection Algorithm for UWB SAR and a Comparison between Fast- and Global Backprojection2008Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In this thesis, we present a study of the Fast Backprojection (FBP) known to be a fast time-domain algorithm for image retrieval in Synthetic Aperture Radar (SAR). As a time domain algorithm, FBP possesses inherent advantages such as perfect motion compensation, unlimited scene size, wide bandwidth and ability to handle long integration angles. Although FBP reproduces SAR images on pixel-by-pixel basis, the processing time for FBP is reduced significant compared to the Global Backprojection (GBP) with a heavy computational load. For GBP, the number of operations to process a N×N SAR image with N aperture positions is proportional to N . Whereas, the number of operation required by FBP in the same case is reduced by a factor of sqrt(N) i.e. proportional to N2sqrt(N). We give a detailed explanation on how to implement FBP in Matlab in order to retrieve a SAR image. We explain about different techniques of interpolation used to obtain a high quality image. We also present a method to compare between interpolation techniques in term of SAR image quality and processing time. A comparison between FBP and GBP is also a topic to be discussed in this thesis. In this comparison, the processing time in theory and reality will be focused.

  • 13568.
    Yvonne, Ceraolo
    et al.
    Blekinge Institute of Technology, School of Management.
    Elina, Kettinen
    Blekinge Institute of Technology, School of Management.
    Verksamhetsstyrning med fokus på intressenters och medarbetares betydelse: ett fundament för företagens varaktiga framgång?2012Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    We would like to gain a more in depth knowledge of whether the modern orientations both within corporate governance and control philosophy lay the foundation for enterprises’ more sustainable success. These both modern orientations are increasingly focusing on the importance of enterprises’ setting of goals and visions on the basis of stake holders’ interests and the employees’ more active engagement in and motivation for the goal achievement. Despite these common inherent characteristics, it is not evident from current scientific debate how such integration actually emerges in the control philosophies of the enterprises. However, the above mentioned common inherent characteristics, focused on the stakeholders’ interests and employee’s active engagement, could support our view on the broader perspective of steering and organizing of enterprises. The purpose of our thesis is to analyze whether the modern orientations both within corporate governance and performance management could establish a joint view on steering and organizing of enterprises, where the setting of targets and visions are based on the stake holders’ interests and where the enterprises are more oriented to interact with their surroundings. These strategies need to be thoroughly embedded with the employees throughout the whole organization. As a consequence we are especially interested whether our illustration of a more holistic perspective of steering and organizing of enterprises with emphasis on increasing consideration both on the stakeholders’ interests and on the employees’ more active engagement and motivation, could bring more positive outcomes for enterprises’ goal fulfillment and adaptability. Furthermore, we have found a number of indications suggesting that such a holistic perspective of steering and organizing of enterprises could lay the foundation for sustainable success of the enterprises. However, the concept of success can be defined through several different measurements. Success depends highly on the individual circumstances in each organization, whereby every enterprise needs to define its own criteria. Accordingly, we think a sustainable success requires that the enterprises’ targets and visions ate defined in line with the stake holders’ interests. The next step would be to transform these goals into concrete operational activities that are closely integrated in the daily work. It is therefore critical that the enterprises’ strategies are thoroughly embedded with the employees in order to be able to adapt the business to new challenges that the organization might face from time to time. By means of a qualitative literature study both within corporate governance and control philosophies, combined with an empirical study focused on a few enterprises’ control philosophy, we have found support for our assumption of the potential for a more holistic perspective of steering and organizing of enterprises. Such a holistic perspective for control philosophy is well in line with the development of the modern corporate governance theories and modern theories on control philosophies emphasizing the stakeholders' interests and the employees’ active commitment towards goal achievement. Key words: corporate governance, internal and external control mechanisms, control philosophy, stakeholders, balanced scorecard, organizational culture, success.

  • 13569.
    Yılmaz, Delfin
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Kazbekov, Kirill
    Blekinge Institute of Technology, School of Engineering.
    Titiz, Merve
    Blekinge Institute of Technology, School of Engineering.
    Decision Making for Strategic Sustainable Development in Selected Swedish Ecovillages2011Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Despite of significant role of collective decision making in strategic community development towards sustainability, this area is seen to be generally underestimated by community planners and ecovillage members, comparing with, for example, legal, financial and technological aspects of community life. This study aims to understand how Strategic Sustainable Development (SSD) perspective can contribute to decision making procedures in ecovillages in Sweden. The research examines how decision making procedures work in ecovillages today and to which extent strategic component, viewed through SSD perspective, is currently incorporated. Secondly research explores how SSD perspective could possibly be incorporated into decision making procedures in ecovillages, in order to foster their development towards sustainability. To address this purpose decision making model was created, based on literature review; three ecovillage studies were conducted; and recommendations were offered, based on findings from literature and findings from current experience of selected ecovillages in Sweden.

  • 13570.
    Yılmazer, Şafak Enes
    Blekinge Institute of Technology, School of Engineering.
    Integrated Coverage Measurement and Analysis System for Outdoor Coverage WLAN2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Daily usage of Wireless Local Area Networks (WLAN) in business life for specific purposes has became much more critical than before since it is sometimes crucial to have wireless connectivity and seamless roaming around the working environment. In this thesis, steps required in order to design and implement a large scale outdoor IEEE 802.11g WLAN will be shown. This WLAN project has been deployed in north of Sweden and target coverage was an open area consisting of a deep pit mine, connecting roads, workshops, offices, dumps and storage areas. All telecommunications equipment used in this project is from the manufacturer Cisco using centralized solution. The special purpose of this project is to collect and analyze a series of coverage measurement data and correlate this data to predict the coverage area. Linux bash scripting and Gnuplot has been used to analyze coverage data. Finally, WRAP spectrum management and radio planning software has been used in modeling and designing of the whole network.

  • 13571.
    Zaahid, Mohammed
    Blekinge Institute of Technology.
    Performance Metrics Analysis of GamingAnywhere with GPU acceletayed NVIDIA CUDA using gVirtuS2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The modern world has opened the gates to a lot of advancements in cloud computing, particularly in the field of Cloud Gaming. The most recent development made in this area is the open-source cloud gaming system called GamingAnywhere.

    The relationship between the CPU and GPU is what is the main object of our concentration in this thesis paper. The Graphical Processing Unit (GPU) performance plays a vital role in analyzing the playing experience and enhancement of GamingAnywhere. In this paper, the virtualization of the GPU has been concentrated on and is suggested that the acceleration of this unit using NVIDIA CUDA, is the key for better performance while using GamingAnywhere. After vast research, the technique employed for NVIDIA CUDA has been chosen as gVirtuS.

    There is an experimental study conducted to evaluate the feasibility and performance of GPU solutions by VMware in cloud gaming scenarios given by GamingAnywhere. Performance is measured in terms of bitrate, packet loss, jitter and frame rate. Different resolutions of the game are considered in our empirical research and our results show that the frame rate and bitrate have increased with different resolutions, and the usage of NVIDIA CUDA enhanced GPU.

  • 13572.
    Zachén, Esbjörn
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Extraction of tool reaction forces using LS-DYNA and its use in Autoform sheet metal forming simulation2019Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In product development there is still potential to decrease lead times with faster and more accurate simulations. The objective of this thesis was to study whether Finite Element (FE) simulations using explicit LS-DYNA to extract reaction forces from sheet metal forming tools during forming, could be used to improve existing FE models in sheet metal forming software AutoForm.To begin with, the solid CAD-model of the stamping dies were meshed with tetrahedral elements in CATIA and imported into LS-DYNA. In combination with sheet mesh and milling surface meshes from AutoForm, an explicit model was realized. Contacts between sheet mesh and milling surface meshes used the so-called sheet forming contact. The resulting reaction forces were extracted and used in a simulation using the AutoForm software. Resulting simulation was compared to a scan of the physical sheet metal after forming.The direct transfer of reaction forces from LS-DYNA to AutoForm did however not result in the same pressure distribution in AutoForm. The AutoForm simulations using results from LS-DYNA were slightly worse than standard AutoForm simulations.Further work is needed to try and perhaps implement an implicit solution after an initial explicit solution.

  • 13573. Zackrisson, Johan
    et al.
    Gustavsson, Ingvar
    Håkansson, Lars
    An Overview of the VISIR Open Source Software Distribution 20072007Conference paper (Refereed)
    Abstract [en]

    This paper is intended for people who are interested in creating online laboratories. Blekinge Institute of Technology (BTH) in Sweden has started a project known as VISIR (Virtual Instrument Systems in Reality) together with National Instruments in USA and Axiom EduTech in Sweden to disseminate an online laboratory concept created at BTH using open source technologies in collaboration with other universities and organisations. The VISIR open source distribution 2007 includes software for two implemented examples, one laboratory for low frequency electronics and one for signal processing. The distribution is modular and many modules can be used for other online laboratories. The goal is an international standard, enabling teams worldwide to expand and jointly develop this powerful approach into distributed online laboratories. Each laboratory is a client/server application controlled by an administrative system. These three parts are mainly written in Adobe Flash, C++, and PHP respectively. However, the hardware control module of the equipment server is written in LabVIEW. This paper describes the organisation of the software.

  • 13574. Zackrisson, Johan
    et al.
    Svahnberg, Charlie
    OpenLabs Security laboratory: The online security experiment platform2008Conference paper (Refereed)
    Abstract [en]

    For experiments to be reproducible, it is important to have a known and controlled environment. This requires isolation from the surroundings. For security experiments, e.g. with hostile software, this is even more important as the experiment can affect the environment in adverse ways. In a normal campus laboratory, isolation can be achieved by network separation. For an online environment, where remote control is essential, separation and isolation are still needed, and therefore the security implications must be considered. In this paper, a way to enable remote experiments is described, where users are given full control over the computer installation. By automating the install procedure and dynamically creating isolated experiment networks, remote users are provided with the tools needed to do experiments in a reproducible and secure environment.

  • 13575. Zackrisson, Johan
    et al.
    Svahnberg, Charlie
    OpenLabs Security Laboratory: The Online Security Experiment Platform2008In: International Journal of Online Engineering, ISSN 1868-1646, E-ISSN 1861-2121, Vol. 4, no special issue: REV2008, p. 63-68Article in journal (Refereed)
    Abstract [en]

    For experiments to be reproducible, it is important to have a known and controlled environment. This requires isolation from the surroundings. For security experiments, e.g. with hostile software, this is even more important as the experiment can affect the environment in adverse ways. In a normal campus laboratory, isolation can be achieved by network separation. For an online environment, where remote control is essential, separation and isolation are still needed, and therefore the security implications must be considered. In this paper, a way to enable remote experiments is described, where users are given full control over the computer installation. By automating the install procedure and dynamically creating isolated experiment networks, remote users are provided with the tools needed to do experiments in a reproducible and secure environment.

  • 13576.
    zadeh, Siavash Hooshmand
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Simulation a Disposable mass flow meter by an advanced FSI Modeling and Finite Element Analysis.2014Student thesis
    Abstract [en]

    Abstract -In this thesis a design of a Coriolis mass flow-meter is chosen by considering all advantages and disadvantages and the project requirements. The chosen geometry is imported into COMSOL, because modelling is implemented by FEM and two different physics should be coupled. To consider both applications of the device include measuring density and flow rate, modeling is divided into two parts: Coriolis density meter and Coriolis mass flow-meter. Both applications are based on Fluid Structure Interaction. The results are compared to existing setup’s experimental data. Keywords: Coriolis mass flowmeter, Fluid Structure Interaction, Modal order, FEM, Acoustic Shell Interaction, Phase-shift, Disposable and Polymer.

  • 13577.
    Zafar, Atique
    et al.
    Blekinge Institute of Technology, School of Computing.
    Ali, Sajad
    Blekinge Institute of Technology, School of Computing.
    Investigation of Failure and Success Factors of Integration Process in Global Software Development: Literature Review and Delphi Survey2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Software development work undertaken by virtual teams dispersed across time, space, and organizational boundaries is referred as Global Software Development (GSD) with emphasis on “globalization”. In GSD, teams within same organization (off-shore) or different organizations (outsource) from multiple geographic locations are involved. GSD is becoming a norm and more software projects are undertaken in GSD setting due to the benefits associated with it. However, there remain many challenges that can adversely affect the ability to realize those benefits. One of the challenges is to overcome the problems faced during integration of the functional components developed by different teams at different geographic locations. Incompatibilities and hidden issues surface during functional components integration which is very costly to fix at this stage and can lead to delay, lower product quality or even failure of a GSD project. In this regard, this study investigates integration problems that occurred due to different reasons during different phases/stages of GSD, along with successful integration practices with their relative importance. The study produces lists of failure and success factors, and then further prioritized that failure and success factors lists through Delphi experts. Failure and success factors present an extensive knowledge of integration problems and practical solutions. In addition, their relative importance highlights the severity and importance of each failure and success factor. The results of this study not only help to understand integration issues and solution, but provide a platform to develop a solid strategy at early stage of GSD.

  • 13578.
    Zafar, Muhammad-Sarfraz
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Telecommunication Systems.
    Gill, Muhammad-Shoaib
    Blekinge Institute of Technology, School of Engineering, Department of Telecommunication Systems.
    Evaluation of UDP and SCTP for SIP-T and TCP, UDP and SCTP with constant traffic2009Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In recent years, Voice over IP (VoIP) has gained a lot of popularity. Signaling being an important part of VoIP has been addressed by the (IETF) SIGTRAN working group to meet Quality of Service as given by Public Switched Telephone Network (PSTN), so that both PSTN and VoIP can co-exit and work together in a seamless manner SIP (Session Initiation Protocol) developed by IETF for VoIP signaling is a communication control protocol capable of running on different transport layers, e.g., TCP, UDP or SCTP. Today’s SIP application is mostly operating over the unreliable transport protocol UDP. In lossy environment such as wireless networks and congested Internet networks, SIP messages can be lost or delivered out of sequence. The SIP application then has to retransmit the lost messages and re-order the received packets. This additional processing overhead can degrade the performance of the SIP application. Therefore to solve this problem, the researchers are looking for a more appropriate transport layer for SIP. SCTP, a transport protocol providing acknowledged, error-free, non-duplicated transfer of messages, has been proposed to be an alternative to UDP [1] and TCP [2]. The multi-streaming and multi-homing features of SCTP are especially attractive for applications that have stringent performance and high reliability requirements and an example is the SIP proxy server. In this research, we have analyzed the performance offered by SCTP for SIP message delivery in the perspective of historic research work as well as determined call setup time using UDP and SCTP by simulating SIP traffic in Network Simulator-2 (ns-2). We also evaluate TCP, UDP and SCTP traffic with constant bit rate of traffic through ns-2

  • 13579.
    Zahda, Showayb
    Blekinge Institute of Technology, School of Computing.
    Obsolete Software Requirements2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Context. Requirements changes are unavoidable in any software project. Requirements change over time as software projects progress, and involved stakeholders (mainly customers) and developers gain better understanding of the final product. Additionally, time and budget constraints prevent implementing all candidate requirements and force project management to select a subset of requirements that are prioritized more important than the others so as to be implemented. As a result, some requirements become cancelled and deleted during the elicitation and specification phase while other requirements are considered not important during the prioritization phase. A common scenario in this situation is to leave the excluded requirements for being considered in the next release. The constant leaving of the excluded requirements for the next release may simply render them obsolete.

  • 13580.
    Zahoor, Amir
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Koodtalang, Wittaya
    Blekinge Institute of Technology, School of Engineering.
    Visual Quality Improvement of Digital Video by Stabilization Using Adaptive CMAC Filtering2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    A Digital Video Stabilization (DVS) system removes the unwanted shaking in the videos acquired by hand-held cameras and preserves the panning. In this thesis work, a digital video stabilization model is proposed based upon adaptive cerebellar model articulation controller (CMAC) filtering. A CMAC is a manifestation of the associative memory learning structure present in the cerebellum of human being. Adaptive CMAC filtering has favorable properties of small size, good generalization, rapid learning and dynamic response. So, it is more suitable for high-speed signal processing applications. The adaptive CMAC is used to adjust the coefficients of IIR filter employed in the proposed model. The training of CMAC is based upon a fuzzy rule. The efficiency of the proposed adaptive CMAC filtering has been validated by evaluating it on a set of test videos sequences. We have done performance comparison of CMAC algorithm with already existing algorithms such Kalman filter, Modified proportional integrated (MPI) controller and adaptive fuzzy filtering in terms of smooth index (SI), peak signal to noise ratio (PSNR), mean square error (MSE) and point spread function (PSF).

  • 13581.
    Zahoor, Amir
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Koodtalang, Wittaya
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Shahid, Muhammad
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Lövström, Benny
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Visual Quality Improvement of Digital Video by Stabilization Using Adaptive CMAC Filtering2012Conference paper (Refereed)
    Abstract [en]

    A digital Video Stabilization (DVS) system removes the unwanted shaking in the videos acquired by hand-held cameras and preserves the panning. In this paper, a digital video stabilization system is proposed based upon adaptive cerebellar model articulation controller (CMAC) filtering. A CMAC is a manifestation of the associative memory learning structure present in the cerebellum of human being. Adaptive CMAC filtering has favorable properties of small size, good generalization, rapid learning and dynamic response. Thus, it is more suitable for high-speed signal processing applications. The adaptive CMAC is used to adjust the coefficients of IIR filter employed in the proposed model. The training of CMAC is based upon fuzzy rule. The efficacy of the proposed adaptive CMAC filtering has been validated by evaluating it on a set of test video sequences.

  • 13582.
    Zajic, Selvira
    Blekinge Institute of Technology, School of Health Science.
    Visa att du bryr dig! Att belysa kvinnors upplevelse av sjukvårdspersonalens stöd vid missfall2012Student thesis
    Abstract [sv]

    Bakgrund: Det är vanligt med missfall i tidig graviditet och cirka 15 % av alla graviditeter avslutas med ett missfall de första 12 veckorna. Kvinnor upplever stor sorg vid missfall och sjukvårdspersonalens stöd har en stor inverkan på patienternas upplevelse. Syfte: Syftet med studien var att belysa kvinnornas upplevelse av sjukvårdspersonalens stöd vid missfall. Metod: Den metod som användes var en litteraturstudie med granskning av artiklar med kvalitativ metod. Analysen gjordes med hjälp av Graneheim och Lundmans (2004) tolkning av en innehållsanalys. Resultat: Analysen resulterade i tre kategorier empati, brist på omsorg och information. Majoriteten av kvinnorna upplevde att personalen inte visade empati och de kände sig ensamma och lämnade av sjukvårdspersonalen. Brister i informationen och förklaringar kunde också ses. Slutsats: Det fanns brister i stödet som gavs till kvinnor vid missfall. Det bristande stödet resulterade i ett lidande och en dålig vårdupplevelse. Vidare forskning bör göras för att en förbättring ska se i hur sjukvårdspersonalen stödjer kvinnor som genomgår missfall.

  • 13583.
    Zakaeva, Djaneta
    et al.
    Blekinge Institute of Technology.
    Assad, Danny
    Blekinge Institute of Technology.
    Kriskommunikation i en idrottsförening: En fallstudie om Helsingborgs Idrottsförening i kris2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syfte: Syftet med denna studie är att undersöka hur idrottsföreningar kan tillämpa kriskommunikation och kommunikationsstrategier för att återhämta en idrottsförening från en allvarlig kris. Avsikten med undersökningen är även att få fram hur brister i kriskommunikation och kommunikationsstrategier kan drabba idrottsföreningars hantering av allvarliga krissituationer och därmed orsaka ekonomisk skada för föreningen.  Metod: Detta är en kvalitativ studie som har undersökts genom fyra intervjuer. Forskningsmetoden är fallstudie. Synsättet som används i uppsatsen är hermeneutik, då personerna som intervjuas har angett information om hur de tolkar situationen och hur detta påverkar föreningen genom deras tolkning.   Slutsats: Studien har visat hur idrottsföreningar kan tillämpa kriskommunikation och kommunikationsstrategier för att återhämta en förening från en allvarlig kris. Studien har konstaterat att Helsingborgs IF har hanterat krisen dåligt. En stor anledning var att föreningen saknade krisplan och att kommunikationsstrategin inte var väl inarbetad samt att ledningens hade försvarsställning mot media. Deras styrkor var bland annat att föreningen tog in en extern expert inom krishantering och att föreningen hade ett bra förhållande med sina sponsorer sedan tidigare, vilket fick sponsorerna att stanna kvar under krisen.

  • 13584.
    Zakaria, Mohamad
    Blekinge Institute of Technology, School of Management.
    The Role and Function of Effective Communication in the Planning-Phase of Multi-Organizational International Projects2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    This thesis aims at tackling an important issue in the communication management of multi-organizational international projects. Furthermore, it focuses on the importance of effective communication in the planning stage of this kind of projects. The literature review shows the importance of effective communication among the different stakeholders at this stage of the project planning in the life cycle of such projects in particular. The empirical data received through interviews of three projects of this kind supports the literature about the importance of effective communication at this stage of the project since the lack of effective communication at this planning stage increases the chances of the failure of the whole project.

  • 13585.
    Zakrisson, Victor
    Blekinge Institute of Technology, School of Planning and Media Design.
    Recreational spaces as a result of flood protective barriers2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Det är troligt att klimatförändringar kommer påverka havsnivån genom att denna stiger upp till en meter det kommande århundradet. På grund av den sedentära livsstil vi idag har i kombination med att vi gärna bosätter oss nära havsranden, kommer människor antingen bli tvungna att flytta eller implementera åtgärder för att skydda sig mot den stigande havsnivån. När skyddsåtgärder sätts in, kan områden som skapas eller skyddas användas för andra ändamål, exempelvis rekreationsområden. Genom att studera översiktsplaner och platser runt om i världen där skyddsåtgärder har satts in har idéer utformats om hur man kan hantera framtida risker för Höllviken, i Skåne, Sverige kopplade till risken från en stigande havsnivå. Det har visat sig att anledningen till vad man valt att skydda skiljer sig. Genom att använda sig av ett geografiskt synsätt i analys och undersökningsfasen vid ett implementerande av skyddsbarriärer, kan intressen, både sociala, ekonomiska och miljömässiga tillmötesgås. Förutom själva barriären är det viktigt hur beslutstagare hanterar verktyget de förfogar över i sina skyddsåtgärder. Strategierna varierar runt om i världen beroende på hur den lokala kulturen ser ut. Idag skulle det vara nyttigt att lära av varandra för att optimera varierade situationer som kan komma med klimatförändringar. Genom att studera närliggande kommuner har det visat sig att Höllviken ligger långt fram i sin åtgärdsplan för att hantera framtida fluktuationer i havsnivån. Designförslaget i denna uppsats för Höllviken inkluderar två platser, den norra och södra stranden. Vid den norra stranden återtas mark från havet tack vare den introducerade barriären. Detta för att införa nya funktioner (rekreation mm.) i området samt hantering av överskottsvatten från det ibland överbelastade dagvattensystemet. Vid Kämpingestranden i söder handlar diskussionen och implementeringen snarare om hur man kan använda sig av de naturliga elementen som finns idag, sanddyner, och förstärka dessa för att hantera den förväntade stigande havsnivån. Eftersom sanddyner är lätteroderade ges förslag på åtgärder som kan sättas in för att minska den mänskliga och naturliga påverkan av dynerna.

  • 13586.
    Zalar, Alva
    Blekinge Institute of Technology, Faculty of Engineering, Department of Spatial Planning.
    Den gröna markens marginalisering: En diskursanalys av omförhandlade konstruktioner av välfärdens landskap2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Denna studie är gjord som ett examensarbete inom Masterprogrammet i stadsplanering på Blekinge Tekniska Högskola under våren 2019. Det finns en större mängd forskning som resonerar kring nya entreprenörsurbanistiska ideal som sätter både planeringen som verksamhet och staden i ett nytt sammanhang. Det innebär nya utmaningar för mer traditionellt välfärdsorienterade motiv och praktiker till förmån för offentlig-privat samverkan samt nya sätt att arbeta för ekonomisk tillväxt. 1960-talet har lämnat efter sig ett diskursivt materiellt arv av välfärdsplanering som starkt präglat staden men som nu omvärderas och omförhandlas utifrån just nya ideal. Malmö är ett tydligt exempelpå denna utveckling, vilket är den avgörande anledningen till att Rosengård (Törnrosen och del av Örtagården) används som studieområde. Utemiljöerna och de gröna offentliga rummen har i sin tur spelat stor roll för 1960-talets stadsplanering och samhälle, vilket gör att dessa grönytor begreppsliggörs som “välfärdens landskap” i denna uppsats. Genom dem konceptualiseras planeringens vilja att ordna stadens (gröna) offentliga rum och medborgarna, men också hur de oplanerade och öppna grönytorna har varit platser för det alternativa och normbrytande. Mot en sådan bakgrund undersöks konstruktionen av utemiljöerna när ett 1960-talsområde förtätas och förnyas. Hur förhåller sig planeringen till dessa välfärdslandskap och kan planeringens konstruktion avdem relateras till övergripande narrativ? Vad innebär det i så fall för relationen planerare - medborgaren? För att kunna undersöka denna typ av frågor situeras studien i ett forskningsfält som dels berör konkurrens mellan välfärd och entreprenöriell stadsutveckling, dels den modernistiska staden (exempelvis miljonprogrammet) och dess utemiljöer som ett uttryck för välfärdsorienterade ambitioner, dels förtätning av grönytor. Vidare ramas analysen in av teori kring makt och normativitet för att förstå den intrikata samverkan mellan planeringen, staden och medborgaren. Den franska filosofen och idéhistorikern Michel Foucaults teorier är utgångspunkt för teorin men det är också en eklektisk läsning av olika sätt att förstå Foucaults idéer om normativitet och relationell makt. Metod och teori presenteras gemensamt eftersom det teoretiska ramverket går hand i hand med metoden, diskursanalys. Det entreprenörsurbanistiska narrativet framträder starkast genom analysen, traditionella välfärdsvärden omförhandlas utifrån hur de kan passa in i berättelsen om förtätning. Detta eftersom förtätningen framstår som det överordnade värdet. Konstruktionen av utemiljöerna grundar sig därför i att möjliggöra förtätning och förnyelse, vilket gör att grönytorna omförhandlas, ordnas hierakiskt och marginaliseras. Den postpolitiska och till synes neutrala förpackningen gör att projektet kan förmedla en bild av att grönytorna ökar (i kvalitet, intensitet, användbarhet) trots att ytan faktiskt kraftigt minskar. Analysen pekar på hur det visar på ett marginaliserande av det befintliga i området också spiller över på medborgarna, genom att ta grönytor i anspråk i förtätningens namn marginaliseras den befintliga invånaren till förmån för ett nytt medborgerligt subjekt. Gamla Rosengårds nya sammanhang som en tydligare del av innerstaden och ett område med “potential” gör att förändringen i sig är mer avgörande än områdets och den befintliga invånarens rätt i sig.

  • 13587.
    Zalar, Moa
    Blekinge Institute of Technology, School of Management.
    Gruppdynamik i manliga idrottslag2012Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    The aim of this study is to examine male sports teams and to increase our knowledge of the construction of group dynamic and effects on the team end its individuals. The method used is (3) semi-structured interviews as well as observations. The findings show that the group dynamic is a very important part of sport teams. The existing atmosphere is based on established traditions regarding how men should behave and on the role composition of the team. This, in turn, creates a special tone and communication within the team that promotes the we-feeling and community bond. The conclusion is that the group dynamic is central for functioning sports team and provides a security, a feeling of fitting in and of belonging. However, there is a need to be open to differences within team sports such as sexual orientation and the like.

  • 13588.
    Zalasinski, Marcin
    et al.
    Czestochowa University of Technology, POL.
    Cpalka, Krzysztof
    Czestochowa University of Technology, POL.
    Rakus-Andersson, Elisabeth
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    An Idea of the Dynamic Signature Verification Based on a Hybrid Approach2016In: Artificial Intelligence and Soft Computing LNAI 9693: Proceedings of the 15th International Conference, ICAISC 2016 / [ed] Leszek Rutkowski et al., Berlin Heidelberg: Springer, 2016, Vol. II, p. 232-246Conference paper (Refereed)
    Abstract [en]

    Dynamic signature verification is a very interesting biometric issue. It is difficult to realize because signatures of the user are characterized by relatively high intra-class and low inter-class variability. However, this method of an identity verification is commonly socially acceptable.

    It is a big advantage of the dynamic signature biometric attribute. In this paper, we propose a new hybrid algorithm for the dynamic signature verification based on global and regional approach. We present the simulation results of the proposed method for BioSecure DS2 database, distributed by the BioSecure Association.

  • 13589.
    Zamaninezhad, Ladan
    Blekinge Institute of Technology, School of Engineering.
    Localization of Environmental Reflectors by Acoustic Measurement2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    The knowledge of the acoustic environment is advantageous for many applications of signal processing such as speech enhancement and spatial sound field reproduction. One of the important features of an enclosure is the location of its boundaries. This research investigates localizing the boundaries of an enclosure by the help of acoustic measurements for the one-dimensional case. The main tool which is used for localizing the boundaries is the Green's function. For simple geometries, the Green's function can be calculated analytically as well as by the help of the mirror image model. Two different approaches are studied. The first approach which is called the multi-sensor approach utilizes the energy of the enclosure's modes to pursue the localization. The second approach which is called the broad-band approach uses the resonance theory and optimization method. The broad-band approach introduces a cutting edge algorithm for reducing the number of sensors in use. The validity of both methods is proved by simulation. The correctness of broad-band approach is verified for the data obtained from a physical measurement. The measurement confirms the accuracy of the algorithm for the real world applications. The research also presents a glimpse on determining Green's function for higher dimensions and different acoustic environments.

  • 13590.
    Zamir, Helalia
    Blekinge Institute of Technology, Faculty of Engineering, Department of Spatial Planning.
    Miljö och vatten i fysisk planering: Detaljplanering av Norra Älvstranden i Göteborg2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Många kustnära svenska städer riskerar att drabbas av framtida klimatförändringar, men framförallt stigande havsnivåer, något som ska beaktas och tas hänsyn till i den fysiska planeringen. Men hur? Parallellt med detta pågår stadsomvandlingar, med bland annat nybyggnation i kust- och vattennära områden, för att skapa en attraktiv kommun där folk vill bosätta sig och bo kvar. Den fysiska planeringen präglas , å andra sidan, av en osäkerhet kring hur anpassning till ett förändrat klimat, och särskilt stigande havsnivåer, ska gå till fastän det på den lokala nivån finns medvetenhet om detta. Denna uppsats syftar till att öka kunskapen kring hur klimatfrågor, i synnerhet risker med stigande havsnivåer, hanteras i den fysiska planeringen, genom att undersöka hur detta har behandlats i detaljplanering av tre planområden i Norra Älvstranden i Göteborg.

    För att undersöka syftet har en fallstudie gjorts över tre planområden i Norra Älvstranden, med en kvalitativ dokumentstudie som metod. Detaljplan, med tillhörande plankarta och planbeskrivning för respektive planområde, har ingått i fallstudien. Vidare har Plan- och bygglagen, Boverket och Länsstyrelsen studerats i enighet med uppsatsens syfte. Dessa har undersökts enligt följande analysfrågor som lyder: Hur hanterar lagar och regler samt riktlinjer på nationell nivå klimatfrågor i den fysiska planeringen, mer specifikt i detaljplanering? Var och i vilken utsträckning behandlar detaljplanerna klimatfrågor, framförallt stigande havsnivåer? Hur beskriver detaljplanerna synen på vattnet? Hur hanteras bebyggelsen när det gäller: a) lägsta golvnivå för färdigt golv? b) avstånd till vattnet?

    Diskussionen i uppsatsen görs utifrån teoretiska utgångspunkter som har sin grund i hur den fysiska planeringen hanterar risker med klimatfrågor i dagens samhälle med den ökade globaliseringen och den tekniska utvecklingen, också kallad för ett risksamhälle. Begrepp som robusthet, ett robust samhälle, experternas roll och expertkunskap diskuteras.

    Att dagens klimatförändringar är orsakade av mänskliga aktiviteter är något många forskare diskuterar idag. Det innebär att vi ska möta dess konsekvenser, inte minst inom den fysiska planeringen. Risker med stigande havsnivåer är något som de flesta av kustnära svenska städer möts av redan idag. Norra Älvstranden i Göteborg ligger vid Göta Älv och dessutom i en låglänt terräng. Området, som tidigare har varit ett hamnområde, har successivt omvandlats till ett attraktivt bostadsområde med blandade aktiviteter. Av de granskade detaljplanerna går det att se en medvetenhet om klimatriskerna i detaljplaneringen. Planerna föreslår åtgärder för att anpassa bebyggelsen inför kommande klimatförändringar, exempelvis höjs den lägsta grundläggningsnivån. Å andra sidan går det läsa hur synen på vatten kvarblir som ett viktigt element i planeringen. Sammanfattningsvis kan det konstateras att det finns en ganska oföränderlig syn på hur klimatfrågorna i detaljplaneringen ska behandlas.

  • 13591. Zang, Zhuquan
    et al.
    Nordholm, Sven
    Nordebo, Sven
    Complex Domain Digital Filter Design with Max-Min Type Amplitude Constraints and Group Delay Specifications2001Conference paper (Refereed)
    Abstract [en]

    This paper considers the design of a digital filter with prescribed magnitude and group delay specifications. Our aim is to devise suitable methods/algorithms which are useful for the design of a set of filters for multiuser communication systems. To do this, we formulate our filter design problem as a constrained L2 space minimization problem in which the performance requirement on the group delay and magnitude in the passband are treated as constraints while minimizing the L2 norm of the error function between the designed and the desired filters. Methods for solving the proposed nonlinear and nonconvex optimization problem are outlined. Numerical results are presented to illustrate the usefulness of the proposed method.

  • 13592. Zang, Zhuquan
    et al.
    Nordholm, Sven
    Nordebo, Sven
    Cantoni, Antonio
    Design of Digital Filters with Amplitude and Group Delay Specifications2001Conference paper (Refereed)
    Abstract [en]

    This paper considers the design of a digital filter with prescribed magnitude and group delay specifications. First, we outline the derivation of the phase and group delay functions of an Nth order digital Laguerre filter and show that the group delay function of the filter can be written as a ratio of quadratic functions in the filter coefficients. Then, we formulate our filter design problem as a constrained L2 space minimization problem in which the performance requirement on the group delay and magnitude in the passband are treated as constraints while minimizing the L2 norm of the error function between the designed and the desired filters. Methods for solving the proposed nonlinear optimization problem axe outlined. Numerical results are presented to illustrate the usefulness of the proposed method. As a special case, corresponding results for general FIR filters axe also derived

  • 13593.
    Zar, Abu
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Asghar, Raja Abid
    Blekinge Institute of Technology, School of Engineering.
    MATLAB SIMULATOR FOR ADAPTIVE FILTERS2013Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    Adaptive filters play an important role in modern day signal processing with applications such as noise cancellation, signal prediction, adaptive feedback cancellation and echo cancellation. The adaptive filters used in our thesis, LMS (Least Mean Square) filter and NLMS (Normalized Least Mean Square) filter, are the most widely used and simplest to implement. The application we tested in our thesis is noise cancellation. A detail study of both filters is done by taking into account different cases. Broadly test cases were divided into two categories of stationary signal and non-stationary signal to observe performance against the type of signal involved. Noise variance was another factor that was considered to learn its effect. Also parameters of adaptive filter, such as step size and filter order, were varied to study their effect on performance of adaptive filters. The results achieved through these test cases are discussed in detail and will help in better understanding of adaptive filters with respect to signal type, noise variance and filter parameters.

  • 13594.
    Zarad, Abdallah
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Developing an advanced spline fatigue prediction method2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Fatigue failure is one of the most critical issues in industry nowadays as 60 to 90 percent of failures in metals are due to fatigue. Therefore, different methods and approaches are developed to estimate the fatigue life of metallic parts. In this research, a case-hardened steel splined shaft is studied to estimate the fatigue life that the shaft will withstand before failure. The purpose of the research is to develop an advanced fatigue prediction method for splines.A static experimental test was performed on the splined shaft for analyzing the load-strain behavior of the shaft and determining the suitable load cases of the study. A dynamic test of pure torsional load was carried out to collect experimental results for validating the generated fatigue methods and investigating the failure behavior of the shaft. Stress analysis was performed on the part for investigating critical areas and the effect of the different spline teeth designs on the resulting stress. Two finite element models were analyzed using two software, MSC Marc software with a geometry of straight spline teeth and Spline LDP with an involute spline teeth model. DIN 5466-1 spline standard’s analytical solution was used for verification purposes. Stress and strain-based approaches were used to estimate fatigue life. The most suitable method was evaluated against experimental test results.The research findings show that the most critical stress areas on the shaft are the spline root fillet and relief. When the part fails due to fatigue the crack initiates at the root fillet and propagates to the relief. It is also shown that involute teeth spline gives higher stress than straight teeth for the same load due to less contact area.The conclusion of the research could be summarized in: the stress-based method (Wöhler curve) is giving good accuracy and proved a reliable method. While among six different approaches used of strain-based methods, four-point correlation method is giving the best correlation to test results. Hence, it is recommended to use four-point correlation method for fatigue analysis for its accuracy and for considering both elastic and plastic behavior of the material.

  • 13595.
    Zarea, Kourosh
    et al.
    University of Medical Sciences, IRN.
    Ghanbari, Samira
    University of Medical Sciences, IRN.
    Beiranvand, Saeed
    University of Medical Sciences, IRN.
    Tuvesson, Hanna
    Blekinge Institute of Technology, Faculty of Engineering, Department of Health.
    Incidence of gastrointestinal cancers in Iran: A systematic review2017In: Jundishapur Journal of Chronic Disease Care, ISSN 3758-2322, Vol. 6, no 1Article in journal (Refereed)
    Abstract [en]

    Context: In service planning, indicators such as incidence can aid the development of strategies for service provision. The current systematic review was carried out to provide a general viewpoint on incidence, geographical and age distribution of gastrointestinal (GI) cancers in Iran.

    Evidence Acquisition: A detailed Science Direct, PubMed, Scopus, Google Scholar, Iran Medex, Magiran and SID (scientific information databases) search was made from 2005 to 2015. The basic inclusion criteria were all relevant studies focused on GI cancers incidence and epidemiologic data from Iran.

    Results: Overall incidence of cancer was 19.4 and 17.2 per 100 000 in males and females, respectively. The three most common GI cancers in males were: esophagus, stomach and colorectal and in females: colorectal, stomach and esophagus. The highest incidence rate was observed in Golestan province and in the age group over 65 years.

    Conclusions: According to increasing incidence rate of GI cancers in Iran, development, establishment and implement of comprehensive national cancer control program should be the first priorities for health policy makers.

  • 13596.
    Zasad, Muhammad Rabiul
    et al.
    Blekinge Institute of Technology, School of Computing.
    Uddin, Jia
    Blekinge Institute of Technology, School of Computing.
    Study and Performance Comparison of MANET Routing Protocols:TORA, LDR and ZRP.2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Ad-hoc network has opened a new dimension in wireless networks. It allows wireless nodes to communicate with each other in the absence of centralised support. It does not follow any fixed infrastructure because of the mobility of nodes and multi-path propagations. Link instability and node mobility make routing a core issue in MANETs. A suitable and effective routing mechanism helps to extend the successful deployment of MANETs. In this thesis, we have studied details of TORA, LDR and ZRP routing protocols which are routing protocols on use in MANET. The effects on the routing efficiencies with a special focus on the pause time, scalability and node density using throughput, network load, end-to-end delay and packet delivery ratio as indices of performance evaluation for FTP traffic were observed by using OPNET 14.0 modular as simulation tool. Based on our observations from literature and empirical study conducted using OPNET, we have found that among the three protocols, no single protocol can successfully provide optimum efficiency in different MANET scenarios.

  • 13597.
    Zavareh, Alireza
    Blekinge Institute of Technology, School of Engineering.
    Analytical and Numerical methods for a Mean curvature flow equation with applications to financial Mathematics and image processing2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This thesis provides an analytical and two numerical methods for solving a parabolic equation of two-dimensional mean curvature flow with some applications. In analytical method, this equation is solved by Lie group analysis method, and in numerical method, two algorithms are implemented in MATLAB for solving this equation. A geometric algorithm and a step-wise algorithm; both are based on a deterministic game theoretic representation for parabolic partial differential equations, originally proposed in the genial work of Kohn-Serfaty [1].

  • 13598.
    Zawadzki, Claudia
    Blekinge Institute of Technology, Faculty of Engineering, Department of Industrial Economics.
    Bemötande hur vårdgivare upplever att de lär genom omsorgsarbetet2014Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [sv]

    Bemötande är ett ämnesområde som är väldigt centralt för omsorgen av äldre. Det är en företeelse som sker då vårdgivare och vårdtagare möter varandra. En viktig aspekt som bör belysas är utveckling av bemötande. Att ta reda på hur vårdgivaren upplever att den utvecklar sitt bemötande kan belysa på vilka sätt ett bemötande kan utvecklas och förbättras. Syftet med studien är att undersöka vårdgivares upplevelse av hur de utvecklar bemötandet och lär att bemötandet utgör påverkan på vårdtagares hälsofrämjande i omsorgsarbetet. Analysen och tolkningen gjordes utifrån åtta intervjuer där alla respondenterna hade erfarenhet av yrket. Tolkningen skedde med hjälp av hermeneutisk ansats för att få en djupare förståelse för svaren. Resultatet av studien visade att vårdgivaren upplevde att denne lär sig genom att bemöta varje unik individ samt anpassa sig efter varje situation och erfara varje unikt möte med vårdtagaren. Lärandet skedde även genom att kommunicera med vårdtagare i mötet men även med arbetskamrater som bidrog till lärande och därmed bemötandeutveckling, vårdgivaren lärde sig även att bemötandet påverkar vårdtagarens hälsofrämjande genom att vårdtagaren aktivt visade det genom sin kommunikation.

  • 13599.
    Zeaiter, Ali Armand
    et al.
    Blekinge Institute of Technology.
    Ristic, Stefan
    Blekinge Institute of Technology.
    Ledarskap och Motivation: Transaktionell och Transformativ ledarskap inom högskola och vård.2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Medarbetarnas motivation är avgörande för att uppnå organisationens mål. Syftet med studien var att undersöka vilka av de två ledarskapsstilarna (transformativa och transnationella) som har mest påverkan på medarbetarnas motivation.  Undersökningsgruppen bestod av 40 personer. Resultaten visade att både transformativa och transaktionella ledarskapsstilarna är nödvändiga på medarbetarnas motivation. Det specifika resultatet visade att den transformativa ledarskapsstilen hade en högre effekt på medarbetarnas motivation. Resultatet av studien kommer att vara till nytta för att bättre förstå hur medarbetarna motiveras.

  • 13600.
    Zeb, Falak
    et al.
    Blekinge Institute of Technology, School of Computing.
    Naseem, Sajid
    Blekinge Institute of Technology, School of Computing.
    Guidelines for the Deployment of Biometrics Technology in Blekinge Health Care System with the Focus on Human Perceptions and Cost Factor2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Biometrics Technology is an authentication technology that identifies the individuals from their physical and behavioral characteristics. Despite the fact that biometrics technology provides robust authentication and enhanced security, it has not yet been implemented in many parts of the world due to certain issues i.e. human perceptions of the biometrics technology and cost factor, involved in the deployment of biometrics technology. As the biometrics technology involves identity management of individuals that’s why the humans perceptions of biometrics technology i.e. privacy concerns, security concerns and user acceptance issue play a very important role in the deployment of biometrics technology. There for the human perceptions and cost factor need to be considered before any deployment of biometrics technology. The aim of this thesis work is to study and analyze how the people’s perceptions and cost factor can be solved for the deployment of biometrics technology in Blekinge health care system. Literature study, interviews and survey are performed by authors for the identification and understanding of the human perceptions and cost factor. Based on these, solutions in form of guidelines to the issues involved in the biometrics technology deployment in Blekinge health care system Sweden are given.

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