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  • 13051. Ygge, Fredrik
    Power Load Management as a Multi-Commodity Market1997Report (Other academic)
    Abstract [en]

    The current report investigates the application of market-oriented programming to power load management. Power load management (or load management for short) is the management of loads at the customer side in order to manage energy systems more efficiently. As energy systems are very large and heavily distributed (typically including millions of loads in an area covering counties or countries), efficient and conceptually attractive methods are required for making load management successful. This report demonstrates how market-oriented programming can be utilized to meet the above demands.

  • 13052. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Duality in Multi-Commodity Market Computations1997Report (Other academic)
    Abstract [en]

    In search for general equilibrium in multi-commodity markets, price-oriented schemes are normally used. That is, a set of prices (one price for each commodity) is updated until supply meets demand for each commodity. It is well known that in a two-commodity market resource-oriented schemes are conceivable. In this paper we demonstrate the duality between price- and resource-oriented schemes in the general multi-commodity case. We also discuss important properties of the two approaches. In resource-oriented schemes the resource constraint, which says that supply must equal demand, is always fulfilled, implying that at any time the auctioneer can provide a feasible allocation. This is not the case in price-oriented schemes outside market equilibrium. In this paper we introduce a novel any-time algorithm, Proportion, for the price-oriented scheme as well, that allows the auctioneer to deliver a suitable allocation at some deadline (possibly unknown in advance) also before market equilibrium is reached. We also show how the findings for the any-time algorithms can enable more efficient price-oriented markets.

  • 13053. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Duality in Multi-Commodity Market Computations1997Conference paper (Refereed)
  • 13054. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Making a Case for Multi-Agent Systems1997Conference paper (Refereed)
    Abstract [en]

    Multi agent systems (MAS) promise to offer solutions to problems where established, older paradigms fall short. To be able to keep promises, however, in depth studies of advantages and weaknesses of MAS solutions versus conventional ones in practical applications are needed. We offer one such study. Climate control in large buildings is one application area where MAS, and market oriented programming in particular, have been reported to be very successful. We have therefore constructed and implemented a variety of market designs for this problem, as well as different standard control engineering solutions. The paper gives a detailed analysis and comparison, so as to learn about differences between standard versus MAS approaches, and yielding new insights about benefits and limitations of computational markets.

  • 13055. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Making a Case for Multi-Agent Systems1997Report (Other academic)
    Abstract [en]

    Multi-Agent Systems (MAS) promise to offer solutions to problems were established, older paradigms fall short. To be able to keep promises, however, in-depth studies of advantages and weaknesses of MAS solutions versus conventional ones in practical applications are needed. In this paper we offer one such study. Climate control in large buildings is one application area where MAS, and market-oriented programming in particular, have been reported to be very successful. We have therefore constructed and implemented a variety of market designs for this problem, as well as different standard control engineering solutions. This paper gives a detailed analysis and comparison, so as to learn about differences between standard versus MAS approaches, and yielding new insights about benefits and limitations of computational markets.

  • 13056. Ygge, Fredrik
    et al.
    Akkermans, Hans
    On Resource-Oriented Multi-Commodity Market Computations1998Report (Other academic)
    Abstract [en]

    In search for general equilibrium in multi-commodity markets, price-oriented schemes are normally used. That is, a set of prices (one price for each commodity) is updated until supply meets demand for each commodity. In some cases such an approach is very inefficient, and a resource-oriented scheme can be highly competitive. In a resource-oriented scheme the allocations are updated until the market equilibrium is found. It is well known that in a two-commodity market resource-oriented schemes are possible. In this paper we show that resource-oriented algorithms can be used for the general multi-commodity case as well, and present and analyze a specific algorithm. The algorithm has been implemented and some performance properties, for a specific example, are presented.

  • 13057. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Power Load Management as a Computational Market1996Conference paper (Refereed)
    Abstract [en]

    Power load management enables energy utilities to reduce peak loads and thereby save money. Due to the large number of different loads, power load management is a complicated optimization problem. We present a new decentralized approach to this problem by modeling direct load management as a computational market. Our simulation results demonstrate that our approach is very efficient with a superlinear rate of convergence to equilibrium and an excellent scalability, requiring few iterations even when the number of agents is in the order of one thousand. A framework for analysis of this and similar problems is given which shows how nonlinear optimization and numerical mathematics can be exploited to characterize, compare and tailor problem-solving strategies in market-oriented programming.

  • 13058. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Power Load Management as a Computational Market1996Report (Other academic)
    Abstract [en]

    Power load management enables energy utilities to reduce peak loads and thereby save money. Due to the large number of different loads, power load management is a complicated optimization problem. We present a new decentralized approach to this problem by modeling direct load management as a computational market. Our simulation results demonstrate that our approach is very efficient with a superlinear rate of convergence to equilibrium and an excellent scalability, requiring few iterations even when the number of agents is in the order of one thousand. A framework for analysis of this and similar problems is given which shows how nonlinear optimization and numerical mathematics can be exploited to characterize, compare, and tailor problem-solving strategies in market-oriented programming.

  • 13059. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Smart Software as Customer Assistant in Large-Scale Distributed Load Management1997Report (Other academic)
    Abstract [en]

    Advanced information systems present a key enabling technology for innovative customer-oriented services by the utility industry. Real-time and two-way electronic information exchange with the customer over the power grid and other media is now possible. This provides the baseline for a host of new customer services, provided proper advantage is taken of a variety of recent advances in information technology. In this context, we discuss (a) how to engineer knowledge into systems and services, giving rise to smart software and intelligent systems, and (b) how to exploit this practically for novel ways to achieve distributed load management, dealing with thousands of devices simultaneously. A special characteristic of our concept is that the two-way information exchange for load-balancing purposes is based on market mechanisms similar to an auction. This auction is carried out by small smart software programs in devices (such as radiators) that represent and assist the customer. Field experiments with this intelligent and distributed new approach to power load management are currently performed.

  • 13060. Ygge, Fredrik
    et al.
    Akkermans, Hans
    Andersson, Arne
    A Multi-Commodity Market Approach to Power Load Management1998Report (Other academic)
    Abstract [en]

    Power load management is the concept of controlling the loads at the demand side in order to run energy systems more efficiently. Energy systems are inherently highly distributed and contain large number of loads, up to some million. This implies that computationally and conceptually attractive methods are required for this application. In this paper we give two novel theorems for how to decompose general resource allocation problems into markets. We also introduce a novel multi-commodity market design to meet the demands of power load management. The approach is demonstrated to lead to very high quality allocations, and to have a number of advantages compared to current methods.

  • 13061. Ygge, Fredrik
    et al.
    Astor, Eric
    Interacting Intelligent Software Agents in Demand Management1995Conference paper (Refereed)
    Abstract [en]

    Even though distributed computing and two-way communication with the customer is becoming a reality for many energy distribution companies, there is still a need to develop methodologies for more efficient energy management. In this paper we discuss current approaches to demand management, and then present ideas from other areas applied in energy management. We introduce concepts such as computational markets and software agents in this context. In addition, methods entirely based on distributed problem solving to address the computationally hard problems of resource allocation with vast number of clients are described. We also discuss how these methods can be used to perform cost/benefit analysis of demand management.

  • 13062. Ygge, Fredrik
    et al.
    Astor, Eric
    Interacting Intelligent Software Agents in Distribution management1995Report (Other academic)
    Abstract [en]

    Even though distributed computing and two-way communication with the customer is becoming a reality for many energy distribution companies, there still is a need to develop methodologies for more efficient energy management. In this paper we discuss current approaches to demand management, and then present ideas from other areas applied to energy management. We introduce concepts such as computational markets and software agents in this context. In addition, methods entirely based on distributed problem solving to address the computationally hard problems of resource allocation with vast number of clients are described. We also discuss how these methods can be used to perform cost/benefit analysis of demand management.

  • 13063. Ygge, Fredrik
    et al.
    Gustavsson, Rune
    Akkermans, Hans
    HOMEBOTS: Intelligent Agents for Decentralized Load Management1996Conference paper (Refereed)
  • 13064.
    Yi, Xin
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Data visualization in conceptual design: developing a prototype for complex data visualization2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In today's highly competitive industries, engineers are driven to not only design a better product to fulfill users' needs but also demanded to develop a product in a short time to occupy the market. With the development of data collection and visualization technology, the application of data visualization into product development to enhance the ability of better product design is a significant trend. 

    Data visualization becomes more and more important since it could illustrate the valuable information, such as tacit needs and patterns which hidden from data, in a communicated way to help engineers get more inspiration for the conceptual design.

     

    It is not hard to collect data; however, the challenge is to visualize the valuable information from a large number of data concisely and intuitively. In recent years, there are some visualization techniques available for product design, while, most of them are implemented in the later stage of product development, few methods are applicable for conceptual design. Therefore, this thesis is carried out to explore appropriate visualization techniques to provide support for conceptual design.

     

    The aim of this thesis is, in an engineering environment, to investigate ways to visualize complex data legibly and intuitively to enhance engineers’ ability for conceptual design from better understanding the current machine. In order to achieve the objective, a conceptual design case of the improvement of wheel loader fuel consumption is applied, which consisted of plenty of data sets within various parameters, to explore how to reveal the hidden information of complex data for engineers.

     

    As the result of this thesis, a prototype contains a series of visualization techniques is proposed to demonstrate data information from a wheel loader under several visualization situations. The final prototype has the functions of visualizing different operations separately; visualizing the overall fuel consumption in one operation; cluster's patterns visualization; visualizing the impact of one variable on the whole value.

  • 13065.
    Yigit, Mert
    Blekinge Institute of Technology, School of Management.
    Organizational Ambidexterity: Balancing Exploitation and Exploration in Organizations2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Purpose: This paper aims to investigate necessity of ambidexterity for organizations. The main interest of this thesis is to investigate why organizations should be ambidextrous and how organizations can reach ambidexterity under the pressure of limited resources and competitive market condition. Findings: This thesis explored relations and tensions between exploitation and exploration in organizational and individual aspects. Findings in the research show that communication skill of the subunits in the case company need to be strengthened. Subunits need to be independent from each other. However, they should be aware of other subunits’ actions. In this sense, there is need for strong information flow between all units in the case company. Participation of employees and teamwork should be promoted by leaders. This thesis suggests that establishing special subunits for explorative activities would not only leverage explorative processes in the organizations but it would also leverage exploitative activities. This issue causes time management and scheduling problem for the employees and also individuals are distracted by focusing on conflicting dimensions such as explorative and exploitative tasks. Behavioral integrity is one of the most important subjects. Behavioral integrity is the key factor to provide consistency between subunits. Independent subunits with common vision lead firms to ambidexterity. Implications: The implications of this study contribute to achievement of organizational ambidexterity in companies. This thesis was started with introduction to importance of ambidexterity, organizational ambidexterity, exploration and exploitation in case of long and short term organizational performance in sight of knowledge based and managerial perspective. It also explored relations and tensions between these dimensions such as exploration and exploitation in terms of organizational and individual aspects, contextual and structural ambidexterity, social support and performance management, dynamic and ambidextrous capabilities with implication of case study research.

  • 13066.
    YILMAZ, FATIH
    Blekinge Institute of Technology, School of Engineering.
    Static and Dynamic Analysis of Älvsbacka Timber Bridge2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    ABSTRACT This thesis is part of a research project in the company of SP, Sweden to investigate the static and dynamic behaviors of Älvsbacka Timber Bridge that known as ‘a smart bridge’. In this context the investigation of project was carried out with simulations and experiments. The Simulation of the bridge was created by using the software program MULTIFRAME 4D®.The simulation analysis includes Finite Element Method, Modal Analysis, Static & Dynamic Force Analyzes. After all simulation analysis, in order to verify the results of the simulations, some experimental tests were performed at Älvsbacka Timber Bridge. The obtained real data which comes from the experimental tests were implemented by use MATLAB® software program. After all investigations, it was achieved as a conclusion of that the results of simulation and experiments showed a good correspondence.

  • 13067.
    Yilmaz, Gulay
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Sound Source Localization by Using Two Microphones2014Student thesis
    Abstract [en]

    This thesis work presents the way of locating the sound source by using two microphone. The idea to approach the goal is based on the Time di fference of Arrival Estimation (TDOA). There are several ways to the TDOA such as the generalized cross-correlation (GCC) and Steered Response Power (SRP).The most common technique used in TDOA estimation is the generalized cross-correlation (GCC). But Steered Response Power PHAT (SRP-PHAT) together with the Windowed Discrete Fourier Transform(WDFT) are mainly focused on this thesis work.

  • 13068.
    Ying, PuLe
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Fan, LingZhi
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Methods For Test Case Prioritization Based On Test Case Execution History2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Motivation: Test case prioritization can prioritize test cases, optimize the test execution, save time and cost. There are many different methods for test case prioritization, test case prioritization method based on test case execution history is one kind of them. Based on the test case execution history, it’s easier to increase the rate of fault detection, hence we want to do a study about test case prioritization methods based on the test case execution history. Meanwhile, executing the feasible methods to compare the effectiveness of them. For the motivation of the thesis may be regarded as an example for experiencing approach for comparing test case prioritizations based on test case execution history, or as a study case for identifying the suitable methods to use and help improve the effectiveness of the testing process.

    Objectives: The aim of this thesis is to look for a suitable test case prioritization method that can support risk based testing, in which test case execution history is employed as the key criterion of evaluation. For this research, there are three main objectives. First, explore and summarize methods of test case prioritization based on test case history. Next, identify what are differences among the test case prioritization methods. Finally, execute the methods which we selected, and compare the effectiveness of methods.

    Methods: To achieve the first and the second study objectives, a systematic literature review has been conducted using Kitchenham guidelines. To achieve the third study objective, an experiment was conducted following Wohlin guidelines.

    Results: In our thesis: 1) We conducted a systematic literature review and selected 15 relevant literatures. We extracted data of the literatures and then we synthesized the data. We found that the methods have different kinds of inputs, test levels, maturity levels, validation and "automated testing or manual testing". 2) We selected two feasible methods from those 15 literatures, Method 1 is Adaptive test-case prioritization and Method 2 is Similarity-based test quality metric. We executed the methods within 17 test suites. Comparing the result of two methods and non-prioritization, the mean Average Percentage of Defects Found (APFD) of Adaptive test-case prioritization execution result (86.9%) is significantly higher than non-prioritization (51.5%) and Similarity-based test quality metric (47.5%), it means that the Adaptive test-case prioritization has higher effectiveness.

    Conclusion: In our thesis, existing test case prioritization methods based on test case execution history are extracted and listed out through systematic literature review. The summary of them and the description of differences can be available in the thesis. The 15 relevant literatures and the synthesized data may be as a guideline for relevant software researchers or testers. We did the statistical test for the experimental result, we can see two different test case prioritization methods have different effectiveness.

  • 13069.
    YiPing, Jin
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering. Shanghai Second Polytechnic University.
    Long, Tao
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering. Kungming University of science and technology.
    Boat Storage System2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Nowadays, people have a boat of themselves become more and more popular. People use their boat for fishing trip and taking holiday. However, most of them do not want to take care of their boat by themselves. One of the reasons might be the place of a boat occupied. Recently, a method has been used is to store boat on the Boat Hotel. They pay for the rent of a boat garage and also hire someone to take care of their boat. Place the boat on the boat shelf with several layers is the most common method. They use forklift to take in/out the boat when boat owner need use their boat. On the conditional of this situation, if we want to take a boat which is inside of boat shelf, then we need take all outside boat out.  It’s really an inefficiency way, so we need improve it.

    In this study, we aim to design a Boat Storage System based on the existing shelf and meet all requirement of existing boat. This system should be reliable, efficient, economic, operable and flexible.

    The main function of the Boat Storage System is to take in/off the boat more quickly and automatically and efficiently. The system is similar with the stereo parking garage. Which have a paternoster controlled by PLC program. Consider of the boat is heavier than the car. Our storage structure should be more stable.

    Our design only need one person to operate it. The whole process will cost few seconds. This building will be established in the water. Therefore, the owner only need to push the button and then the boat will be prepared in the water automatically.

    The modelling and assembly was designed in Autodesk Inventor 2017. This hardware circuit of PLC was drawn in AutoCAD. The software to design the PLC is GX Works 2. And we used ANSYS Workbench 17.2 to analysis the structure. The analysis will prove the structure is safety and strong enough. And the simulation will prove the system is possible. Our conclusion is that this system has a good future and general application in the market.

  • 13070.
    Yiran, Zhou
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Yilei, Liu
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    The Challenges and Mitigation Strategies of Using DevOps during Software Development2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 13071. Yiu, K. F. C
    et al.
    Chan, K. Y
    Grbic, Nedelko
    Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
    Nordholm, Sven
    A Hybrid Design Of Beamformers For Voice Control Devices2012In: Pacific Journal of Optimization, ISSN 1348-9151, E-ISSN 1349-8169, Vol. 8, no 3, p. 533-544Article in journal (Refereed)
    Abstract [en]

    In this paper, a new approach to designing beamformers for voice control device is proposed. It is well-known that under a strong near-field noise with low signal-to-noise ratios (SNR), the performance of speech recognition is deteriorated significantly. However, designing the beamformer for enhancing speech recognition is a slow process and might not be adapted easily to the changing noise environment. In order to lower the complexity of the design, we intend to exploit the combination of existing optimal beamformer designs, which can be implemented in parallel. These include the least-squares technique and the signal-to-noise ratio maximization technique. We show here that for a given pre-trained speech recognizer and for a finite set of speech commands, neither method has a satisfactory performance in speech recognition accuracy under very low SNRs. However, since the two techniques have different characteristics in speech distortion and noise suppression, we show that it is possible to enhance the speech recognition accuracy by combining these two optimal designs.

  • 13072. Yiu, Ka Fai Cedric
    et al.
    Grbic, Nedelko
    Nordholm, Sven
    Teo, Kok Ley
    A hybrid method for the design of oversampled uniform DFT filter banks2006In: Signal Processing, ISSN 0165-1684 , Vol. 86, no 7, p. 1355-1364Article in journal (Refereed)
    Abstract [en]

    Subband adaptive filters have been proposed to speed up the convergence and to lower the computational complexity of time domain adaptive filters. However, subband processing causes signal degradations due to aliasing effects and amplitude distortions. This problem is unavoidable due to further filtering operations in subbands. In this paper, the problem of aliasing effect and amplitude distortion is studied. The prototype filter design problem is formulated as a multi-criteria optimization problem and all the Pareto optima are sought. Since the problem is highly nonlinear and nonsmooth, a new hybrid optimization method is proposed. Different prototype filters are used and their performances are compared. Moreover, the effect of the number of subbands, the oversampling factors and the length of prototype filter are also studied. We find that prototype filters designed via Kaiser or Dolph–Chebyshev window provide the best overall performance. Also, there is a critical oversampling factor beyond which the improvement in performance is not justified. Finally, if the length of the prototype filter increases with the number of subbands, an increase in the subband level will not deteriorate the performance.

  • 13073. Yiu, Ka Fai Cedric
    et al.
    Grbic, Nedelko
    Nordholm, Sven
    Teo, Kok Ley
    Multicriteria Design of Oversampled Uniform DFT Filter Banks2004In: IEEE Signal Processing Letters, ISSN 1070-9908, E-ISSN 1558-2361, Vol. 11, no 6, p. 541-544Article in journal (Refereed)
    Abstract [en]

    Subband adaptive filters have been proposed to avoid the drawbacks of slow convergence and high computational complexity associated with time domain adaptive filters. However, subband processing causes signal degradations due to aliasing effects and amplitude distortions. This problem is unavoidable due to further filtering operations in subbands. In this letter, the problems of aliasing effect and amplitude distortion are studied. Prototype filters which are optimized with respect to those properties are designed and their performances are compared. Moreover, the effect of the number of subbands, the oversampling factors and the length of the prototype filter are also studied. Using the multicriteria formulation, all Pareto optimums are sought via the nonlinear programming technique. We find that the prototype filter designed via the Kaiser window provides the best overall performance among the methods we studied. Also, there is a critical oversampling factor beyond which the improvement of performance is diminishing. Finally, if the length of the prototype filter increases with the number of subbands, an increase in the number of subbands will not deteriorate the performance.

  • 13074. Yiu, Ka Fai Cedric
    et al.
    Ho, Chun Hok
    Grbic, Nedelko
    Lu, Yao
    Shi, Xiaoxiang
    Luk, Wayne
    Reconfigurable Acceleration of Microphone Array Algorithms for Speech Enhancement2008Conference paper (Refereed)
    Abstract [en]

    Microphone arrays play an important role in noise reduction and speech enhancement. Their algorithms are based on beamforming, which reduces the level of localized and ambient noise signals while minimizing distortion to speech from the desired direction via spatial filtering. This paper describes a class of subband beamforming algorithms. The similarity between different algorithms is discussed. To enhance computational efficiency, the algorithms are implemented in frequency domain. A hardware architecture, with bitwidth optimization, is proposed to support the algorithms. An implementation with 7 instances on a Xilinx XC4VSX55 FPGA at 175MHz can run 41.7 times faster than the corresponding pure software implementation on a 3.2GHz Pentium 4 PC. ©2008 IEEE.

  • 13075. Yiu, KFC
    et al.
    Gao, MJ
    Shiu, TJ
    Wu, SY
    Tran, Trung Quang
    Blekinge Institute of Technology, School of Engineering, Department of Signal Processing.
    Claesson, Ingvar
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    A fast algorithm for the optimal design of high accuracy windows in signal processing2013In: Optimization Methods and Software, ISSN 1055-6788, E-ISSN 1029-4937, Vol. 28, no 4, p. 900-916Article in journal (Refereed)
    Abstract [en]

    This paper presents a new optimal window design method with a general window design specification for the passband and stopband. The design problem is formulated as a semi-infinite linear programming problem. With suitable discretizations, an exchange algorithm is employed. The convergence of the proposed algorithm is established. In the formulation, since the stopband is minimized, the method can be employed for the design of very highly optimized windows.

  • 13076.
    Yngvesson, Robert
    Blekinge Institute of Technology, Faculty of Engineering, Department of Spatial Planning.
    Promoting physical activities in urban landscapes: A case study of Rosenholm, Karlskrona, Sweden2014Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Sedentary lifestyle means less normal physical activity, less fitness among the population at large. This may lead to lower health, increased risk of cardiac disease. Less fitness also influences the psychological state of mind, leading to lower self-esteem. To remedy this, more physical activity should be encouraged among the people. To these physical and psychological needs the fact that more and more people live or are in daily contact with cities is added, which means the urban landscapes play a role in motivating physical activity. Different urban landscapes affect the motivation in different ways. This thesis investigated how physical activity is affected by urban landscapes socially, environmentally, economically and by policies, and how to implement a multifunctional exercise area in Rosenholm, Karlskrona, Sweden. Methods such as literature review, interviews, site analyzes and case studies were made in order to get promote theories based on research to design an “Innovative Complete and Optimal Training-track” in Rosenholm together with a development group initiated by “Blekinge Health Arena”. Motivating physical activity can be promoted by measures belonging to the field of urban design, by taking physical, economic, social and cultural factors into account together with policies in all levels. Policymaking is an essential way to increase physical activities among the population and to affect the built environment, which is discussed in this thesis. In order to promote physical activities in urban areas there is no simple solution to apply in order to get results. There is no design to fit them all. Simply creating good opportunities to perform physical activity by means of urban landscapes cannot solve the fact that the public health is decreasing by lack of physical activity. This is as much, if not more, a matter of motivation and change in behavior. But in order to get motivation and to change behavior an environment offering opportunities and possibilities to perform physical activity and at the same time offers socializing is a good start. There are so many dimensions and aspects that need to be considered and are specific in each and every case. A design proposal was made in the Rosenholm case study where various aspects discussed in this thesis were considered displayed by maps, renderings and images.

  • 13077.
    Ynner, Patricia
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Health.
    Eliasson, Anna
    Blekinge Institute of Technology, Faculty of Engineering, Department of Health.
    Hur patienter med psykossjukdomar upplever att vara inlagda inom den psykiatriska slutenvården: En innehållsanalys baserad på patografier2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: En psykossjukdom är ett tillstånd då verklighetsuppfattningen förändras med tillkommande symtom som vanföreställningar, hallucinationer samt förvirring. Vårdpersonal har generellt en sämre attityd mot patienter med psykossjukdomar och det finns begränsad med forskning om hur patienterna upplever detta.

    Syfte: Syftet med studien var att beskriva hur patienter med psykossjukdomar upplever att vara inlagda inom psykiatrisk slutenvård.

    Metod: En kvalitativ innehållsanalys med induktiv ansats baserad på fem patografier. Analysen inspirerades av Lundman och Hällgren Graneheims modell för innehållsanalys med meningsenheter, kondensering, koder, underkategorier och kategorier.

    Resultat: Analysen ledde fram till fyra kategorier och två underkategorier. Tydlig rollfördelning mellan vårdpersonal och patient, Bristen på information och förtroende, Negativa affekter och negativ tillvaro och Medmänsklighet från vårdpersonal med tillhörande underkategorier vikten av goda handlingar och bevarad värdighet och självbestämmande.

    Slutsats: Studien visade att patienterna hade delade upplevelser av att vara inlagda inom den psykiatriska slutenvården. De negativa upplevelserna var fler än de positiva. Det framkom dock ur de positiva upplevelserna att vårdpersonal som utgick från Joyce Travelbees human-to-human-relationship model, om än omedvetet, gjorde att patienterna och vårdpersonalen etablerade betydelsefulla vårdrelationer och att patienterna då fann en mening med att vara inlagda.

  • 13078.
    Yong, Yao
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems.
    Adrian, Popescu
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems.
    On Prioritized Uplink Transmission in Cognitive Radio Mesh Networks2015Conference paper (Refereed)
    Abstract [en]

    In cognitive radio mesh networks, the unlicensed users are allowed to use spectrum opportunities under the restriction of protection of licensed users. The transmission operation of unlicensed users packets is typically done through multiple mesh routers. In the case of a large amount of packet retransmissions, the performance of the whole network system may degrade. To solve this problem, a queueing buffer based priority scheme for mesh routers is suggested. Based on this scheme, the uplink transmission performance of unlicensed users in cognitive radio mesh networks is studied under the condition of imperfect spectrum sensing. 

  • 13079.
    Yong, Yao
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems.
    Adrian, Popescu
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems.
    On the Performance of Uplink Transmission in Cognitive Radio Mesh Networks2015Conference paper (Refereed)
    Abstract [en]

    In cognitive radio mesh networks, the unlicensed users are allowed to use spectrum opportunities under the restriction of protection of licensed users. The transmission operation of unlicensed users packets is typically done through multiple mesh routers. In the case of a large amount of packet retransmissions, the performance of the whole network system may degrade. To solve this problem, a queueing buffer based priority scheme for mesh routers is suggested. Based on this scheme, the uplink transmission performance of unlicensed users in cognitive radio mesh networks is studied under the condition of imperfect spectrum sensing. Numerical evaluation results show the feasibility and effectiveness of the suggested priority scheme. 

  • 13080.
    Yosoh, Asmahan
    Blekinge Institute of Technology, Faculty of Engineering, Department of Spatial Planning.
    Offentliga rum och sociala interaktioner - Gestaltning av det offentliga rummet för att främja social interaktion2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 13081.
    You, You
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Chen, Daxin
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
    Modal Analysis on a MIMO System: For an asphalt roller CC12002015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Impact hammer is the current modal testing way in Dynapac testing department. Due to highly damped characteristic of big construction machines, there are a few weaknesses for modal testing when using hammer, such as short response time, limited frequency resolution, poor quality of frequency response functions. Therefore, a more advanced excitation equipment is needed to improve the measurement quality.

    The object for this study is to compare two different measuring methods. The thesis will show a comparison between the hammer testing and the shaker MIMO testing compared with analytical model in a highly damped system. It will also give a reference for further highly damped modal analysis and budgetary assessment to decide the budget expenditure.

    Result from shaker testing shows a little better correlation than hammer testing compared with FEM model. While the correlation between FEM model and measurement is bad due to many reasons, such as many local modes that can not excited, lack of excitation points, unexpected noise and error from the measurement. While considering the compared results obtained from this machine for now, a simpler structure experiment is suggested to be carried on in the future. Shorter length of stinger can be used to enable higher amplitude of force to excite the property on this machine.

  • 13082.
    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. 

  • 13083.
    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'.

  • 13084.
    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.

  • 13085.
    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.

  • 13086.
    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

  • 13087.
    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.

  • 13088.
    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.

  • 13089.
    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.

  • 13090.
    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.

  • 13091.
    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.

  • 13092.
    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.

  • 13093. 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).

  • 13094. 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)
  • 13095.
    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.

  • 13096.
    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.  

     

  • 13097.
    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.

  • 13098.
    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.

  • 13099.
    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.

  • 13100.
    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.

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