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  • 101. Balakrishna, L.
    et al.
    Kumar, P.V.A.
    Prakash, Chetana
    Gangashetty, Suraykanath
    Speech enhancement using ICA with Bessel features2011Conference paper (Refereed)
    Abstract [en]

    The Independent Component Analysis with Reference (ICA R) also called as constrained ICA (cICA) extracts only the desired source signals from the mixture of source signals by incorporating some prior information into the separation process. To overcome the problem of designing the reference signal when there is no prior information about the desired signal in the cICA, an improved method is proposed to use a different speech signal generated by the same physical source. The cICA is extended to use Bessel coefficients of the observed signals and the reference signal for processing as they converge faster than the other transformations. Since the Bessel functions provide the desired properties, efficient in representing speech signals, less memory storage they have been exploited in speech processing [1]. The results demonstrate the efficiency of the proposed method.

  • 102.
    Balaskas, Antonios
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Lima, Eduardo
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Seed, Tyler
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    A Strategic Approach to Sustainable Development through Official Development Assistance2009Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Adopting a Strategic Sustainable Development (SSD) approach to official bilateral development assistance could result in more effective development planning that yields lasting results in developing countries. A Framework for Strategic Sustainable Development Assistance (FSSDA) based on SSD and customised to the needs of a development agency offers guidance in planning for development towards sustainability. This it does by directing donor and recipient planners in generating holistic perspectives, setting the goal of development as an attractive and sustainable society, and providing a flexible decision-making framework to guide strategic planning. Development assistance donor agencies face several difficulties in ensuring aid effectiveness. The FSSDA offers support in addressing these challenges by: positioning the creation of sustainable societies as the fundamental goal of development; allowing progress against imminent sustainability threats while minimizing the risk of unforeseen negative impacts; balancing economic, environmental and social considerations; and providing a fairer basis for aid conditionality.

  • 103. Ballal, Tarig
    et al.
    Grbic, Nedelko
    Mohammed, Abbas
    Blind Source Separation of Speech Mixtures using a Simple and Computationally Efficient Time-Frequency Approach2007Conference paper (Refereed)
  • 104.
    Banadaki, Davood Dehgan
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Durmush, Sunay Sami
    Blekinge Institute of Technology, School of Engineering.
    Zahiri, Sharif
    Blekinge Institute of Technology, School of Engineering.
    Statistical Assessment of Uncertainties Pertaining to Uniaxial Vibration Testing and Required Test Margin for Fatigue Life Verification2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

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

  • 105.
    Bandreddy, Pavan
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Pokala, Bhargav
    Blekinge Institute of Technology, School of Engineering.
    Perceptual Video Quality Assessment Tool2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

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

  • 106.
    Barela, Krzysztof
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Ciereszko, Piotr
    Blekinge Institute of Technology, School of Engineering.
    Control System Design and Transmission Line Resonance Elimination of a 3-Phase Battery Charger2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

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

  • 107.
    Barkan, Anna
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Gunnarsson, Daniel
    Blekinge Institute of Technology, School of Engineering.
    Postel, Olaf
    Blekinge Institute of Technology, School of Engineering.
    Strategic Sustainable Product Development: A Case of an SME in the Sealing Industry2010Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

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

  • 108.
    Baron-Bonarjee, Jean-Paul
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Elal, Rifat Abed
    Blekinge Institute of Technology, School of Engineering.
    Nguyen, Quynh Van
    Blekinge Institute of Technology, School of Engineering.
    Fostering a Culture of Sustainabilty in Municipalities through Effective Training2013Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Human society as a whole has a reached a tipping point in its relationship with the socio-ecological systems upon which it depends. All sectors of society need to be involved in addressing this crucial challenge through a raised awareness of the issues and pro-active solutions to it. This research focuses on small urban towns and cities, where half the world’s urban population lives, and looks at the ways in which local government in these key areas can play an active role in leading sustainability through education and training. Municipalities and communities that use the framework for strategic sustainable development (FSSD) were investigated, and the conditions were identified that helped and hindered training to be really effective. Effective training, in its many forms, was found to be essential in fomenting a common language of sustainability, engaging the community, and bringing concerted strategic actions that together could foster a culture of sustainability.

  • 109.
    Barrow, Charlotte
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Peterka, Stephanie
    Blekinge Institute of Technology, School of Engineering.
    Ozcuhadar, Tuna
    Blekinge Institute of Technology, School of Engineering.
    Open Source as Leverage towards Sustainable Housing2010Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Shelter poses global sustainability challenges, as the population increase accelerates and resources dwindle. It is crucial for initiatives addressing the growing housing demand to incorporate a sustainability perspective. Open source, a form of Internet information-sharing, is being utilised by various housing initiatives worldwide. However, a sustainability perspective is not always included in a robust and holistic way, despite the negative impacts for human needs and ecosystems resulting from many aspects of current housing practices. The Framework for Strategic Sustainable Development includes basic conditions for a sustainable society and a planning and decision-making methodology to move systematically towards sustainability. It provides a robust method for organizing, evaluating and using tools to aid in handling sustainability challenges effectively. This thesis aims to contribute to the development of affordable, sustainable design solutions, by modelling the incorporation of the FSSD into open source housing initiatives. A case study of a housing project under development in Ghana is used. Despite the complexity of the system under study, the research concludes that bringing a strategic sustainable development perspective to open source approaches can act as leverage for housing to move towards sustainability. Within this context, guidance is provided for approaching open source housing to contribute to SSD.

  • 110.
    Bartunek, Josef Strom
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Nilsson, Mikael
    Sällberg, Benny
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Claesson, Ingvar
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Adaptive Fingerprint Image Enhancement With Emphasis on Preprocessing of Data2013In: IEEE Transactions on Image Processing, ISSN 1057-7149, E-ISSN 1941-0042, Vol. 22, no 2, p. 644-656Article in journal (Refereed)
    Abstract [en]

    This article proposes several improvements to an adaptive fingerprint enhancement method that is based on contextual filtering. The term adaptive implies that parameters of the method are automatically adjusted based on the input fingerprint image. Five processing blocks comprise the adaptive fingerprint enhancement method, where four of these blocks are updated in our proposed system. Hence, the proposed overall system is novel. The four updated processing blocks are: 1) preprocessing; 2) global analysis; 3) local analysis; and 4) matched filtering. In the preprocessing and local analysis blocks, a nonlinear dynamic range adjustment method is used. In the global analysis and matched filtering blocks, different forms of order statistical filters are applied. These processing blocks yield an improved and new adaptive fingerprint image processing method. The performance of the updated processing blocks is presented in the evaluation part of this paper. The algorithm is evaluated toward the NIST developed NBIS software for fingerprint recognition on FVC databases.

  • 111.
    Basaraner, Safak
    Blekinge Institute of Technology, School of Engineering.
    Listening for Temperature2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    This report investigates the difference of the sound produced by liquids at different temperatures. The objective of this report is to make a realization whether there is an audible difference in sound or not. Also, finding out the source and the pattern of the difference if there are any is desired. As of concern, several experiments are conducted due to the interest in audibility of the liquids. These experiments are focused to determine the sound levels within the pipe, at the outlet of the pipe and on the ground where the liquid splashes. Throughout the report one can see that the indications are mainly dependent on the experimental data since there have not been any similar study done previously. Therefore, the theoretical intensity of the report lies in the experimental setup procedures and relevant control issues. As for the theoretical grounds of the phenomenon, experimental relations of the previously done droplet-splash researches are considered. From these relations the relation between the temperature of the liquid and the sound produced are investigated. Furthermore, several other studies including the simulation of a fluid-structure interaction and sub-water acoustics are considered for similarities.

  • 112.
    BASAVA, SRISESHUKUMAR
    Blekinge Institute of Technology, School of Engineering.
    Microphone Array Wiener Beamforming with modeling of SRP- PHAT for Speaker Localization2012Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    The use of microphone arrays to acquire and recognize speech in meetings (conference) poses several problems for speech processing as there exist many speakers within a small space, typically around a table. The necessity to design a suitable microphone array system with minimum noise and more efficient localization algorithms is drawing attention of researchers to work on it. Extensive research is being carried out on Microphone Array Beamforming to make the system, robust, viable and elegant for commercial use. This study is done with a similar objective. A system consisting of 4 microphones arranged in linear array is setup in a simulated reverberant environment. Filter-and-sum beam forming is implemented both in time domain and frequency domain. A Wiener filter is chosen as post filtering technique. One of the main goals of the thesis is to improve the quality of the primary speech signal based on microphone array with Wiener beam forming (filter-and-sum beam forming with wiener post filtering). Weighted over lap add (WOLA) filter bank is also implemented as a part of frequency domain wiener beam forming to make use of subband beam forming. Also RLS algorithm is used to make the subband beamforming adaptive. Speaker localization plays a pivotal role in the development of speech enhancement methods requiring information of the speaker position. Among many localization algorithms, Steered Response Power (SRP) with a combination of Phase Alignment Transform (PHAT) called SRP-PHAT has proved to be a robust one in many studies. Also as a part of this project, modeling of SRP-PHAT for detecting the speaker position for the above described system is done. To evaluate the system performance, Signal-to-Noise-Ratio (SNR) is calculated for both original and beam formed signals. Perpetual Evaluation of Speech Quality (PESQ), an International Telecommunication Union (ITU-T) standard for evaluating quality in speech signals is used for determining the Mean opinion Score (MOS) for both the original and the beam formed signals.

  • 113. Basile, George
    et al.
    Broman, Göran
    Robèrt, Karl-Henrik
    A Systems-based Strategic Approach to Sustainable Enterprise: requirements, utility and limits2011In: The business of sustainability: trends, policies, practices, and stories of success / [ed] McNall, Scott G.; Hershauer, James C.; Basile, George, Praeger Publishers , 2011Chapter in book (Refereed)
    Abstract [en]

    In today's business environment, "garbage" isn't simply worthless refuse to be disposed of anymore; it often represents a material with monetary value. The human population is using up about 30 percent more natural resources in one year than the earth can regenerate. Because businesses constitute half of the world's largest economies, there can be no sustainability without sustainable businesses. The Business of Sustainability: Trends, Policies, Practices, and Stories of Success is a foundation set that effectively captures and articulates the why, what, who, and how of sustainability and business. Volume I covers the scientific, economic, and social underpinnings of sustainability and identifies the challenges facing business leaders.

  • 114.
    Bechtel, Nicola
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Bojko, Roman
    Blekinge Institute of Technology, School of Engineering.
    Völkel, Ronja
    Blekinge Institute of Technology, School of Engineering.
    Be in the Loop: Circular Economy & Strategic Sustainable Development2013Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Current human activities have a significant impact on the socio-ecological system, endangering this system’s capacity to support human civilization and biodiversity. Today’s linear industrial model can be seen as a main driver of this challenge, which implies a need for a model that uses less raw material and is more aligned with the cyclical nature of Earth. A concept that claims to provide such a model is Circular Economy (CE). This study analyses CE for its potential contribution to strategic sustainable development, and explores the barriers and enablers companies face in its implementation process. The main methodologies used for this research include the analysis of the concept by means of a conceptual framework and a Framework for Strategic Sustainable Development, as well as interviews with experts in related fields. The research exposed several gaps between CE and strategic sustainable development. The main barriers were found on a technological, legal, economic level, and at the behavioural level, i.e. the difficulty to change mindsets. Leadership, collaboration, the CE concept itself and customer behaviour were identified as important enablers. These results show that the concept is difficult to implement and that there is a need for a refined approach, which is easier to apply while leading closer towards sustainability.

  • 115.
    Bejjenki, Praneeth Kumar
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Goraya, Muneeb Ahmed
    Blekinge Institute of Technology, School of Engineering.
    Moid, Syed Fovad
    Blekinge Institute of Technology, School of Engineering.
    OPTIMIZED FUZZY BASED POWER CONTROL STRATEGY IN COGNITIVE RADIO NETWORKS IN MULTI FADING PROPAGATION ENVIRONMENTS2013Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    In this thesis we have considered a cognitive radio network (CRN) with a pair of primary user (PU) and secondary user (SU) in spectrum sharing networks in path-loss and without path-loss propagation environments under identically distributed m-Nakagami fading channel. The thesis consists of three parts. In the first part we propose an optimized Takagi-Sugeno Fuzzy Inference System (FIS) based power control strategy in cognitive radio networks (CRN) in spectrum sharing network in without path-loss propagation environment. The second part proposes an optimized Takagi-Sugeno FIS based power control strategy in cognitive radio networks in spectrum sharing network in path-loss propagation environment. For without path-loss propagation environment the proposed FIS takes the interference channel gain ratio between SU transmitter (CUtx) and PU receiver (PUrx) and Signal to Noise Ratio (SNR) towards PU transmitter (PUtx) as antecedents and outputs the power scaling factor for SU. For path-loss propagation environment the proposed FIS takes the relative distance ratio between CUtx and PUrx and SNR towards PUtx as antecedents and outputs the power scaling factor for SU. The output power scaling factor is used to vary the transmit power of SU such that it does not degrade the quality of service (QoS) of PU link. The third part presents an implementation of orthogonal frequency division multiplexing (OFDM) transmission technique in CRN. The OFDM technique has intellectual attractive features like coping with the inter symbol interference (ISI), while providing increasing spectral efficiency and improved performance. This can be used in emergency conditions where transmission requires reliability and high data rate. The OFDM transmission technique is applied towards SU transmitter in CRN, which enables SU to utilize the spectrum efficiently under various fading environments. Spectrum sharing networks in with and without path-loss propagation environments and OFDM transmission were tested for bit error rate (BER) performance after fading effects from m-Nakagami fading channel. We conclude that by applying Takagi-Sugeno Fuzzy Inference System (FIS) based power control strategy we can improve the BER performance of PU when compared with no power control strategy and with other fuzzy based power control technique. OFDM transmission technique gives us better data rate and slightly improved BER in CRN hence making it suitable for use in emergency conditions.

  • 116.
    Belaieff, Antoine
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Moy, Gloria
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Rosebro, Jack
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Planning for a Sustainable Nexus of Urban Land Use, Transport and Energy2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Land use, transport, and energy systems create demands that are transferred to ecosystems. Urban sprawl is increasing, open space and farmland are disappearing and climate change is a growing concern. Yet local, national, and EU policies on sustainable development and economic growth are often at odds with one another. A sector-by-sector approach that focuses on incremental actions precludes effective, integrated solutions. Progress towards sustainability requires a systems-based perspective grounded in science. This paper presents a comprehensive and strategic framework to help communities (1) adopt a whole-systems view to land use, transport, and energy, (2) develop a vision to guide their actions, and (3) strategically adopt actions that close the gap between the current reality and the envisioned sustainable future. An emphasis is placed on strategies related to governance structures and strategies to secure political and public acceptance, including approaches to public participation.

  • 117.
    Benaim, Andre
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Collins, Amber
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Raftis, Luke
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Social Dimension of Sustainable Development: Guidance and Application2008Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    In the shift towards a sustainable society, there have been varying interpretations of what this will mean for the social sphere. Using the parameters for social sustainability presented in the framework for strategic sustainable development (FSSD), this research sought to assist sustainability practitioners in identifying and eliminating the creation of or contribution to barriers that undermine the individual’s capacity to meet their needs. In doing so, the researchers explored the processes of social systems and employed a systems thinking perspective to examine how an organization could, through the intentional structuring of its processes, work to eliminate their contributions to arriers. From this research, characteristics of processes that move an organization towards socially sustainable development were identified as cooperation, transparency, openness, inclusiveness and involvement, around which a guidebook was developed to promote organizational reflection and examination of processes in regards to these characteristics and fundamental human needs.

  • 118.
    Benaim, Andre
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Larsson, Tobias C.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Larsson, Andreas
    Elfsberg, Jenny
    Building a pathway for innovation: Lessons learned from developing an online platform2014Conference paper (Refereed)
    Abstract [en]

    Companies are constantly being pressured to innovate in order to stay competitive in the short run and have new offerings in the long run. One way of boosting innovation is to develop idea support systems that go beyond the traditional methods and tools. Through a qualitative study, this paper explores the lessons learned from developing an online platform for idea generation, and discusses it in terms of innovation process, climate, and capabilities. The results show that the platform itself is not enough for innovation. The structure and work processes around the platform are as important, which implies the need to design processes and procedures that allow an idea to develop, providing, focus, idea feedback and role clarity.

  • 119.
    Benner, Andrea
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    McDonald, James
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Sallak, Abderrahim
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Towards a Sustainable Maritime Transport Corridor: How Could Security and Safety Help Attain This Goal ?2008Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    In a fast moving world where maritime transport corridors play a major role in the movement of people and goods, there are significant sustainability issues with these operations. This paper considers the sustainability of these corridors and the contribution of security and safety measures to achieve sustainability. The research commences with a literature review and practitioner survey on sustainability, security and safety of maritime transport, then develops the analysis using the Framework for Strategic Sustainable Development (FSSD) and causal loop diagrams to analyze and evaluate measures and actions that could lead towards a sustainable maritime transport corridor - education and training, energy alternatives, waste management, dematerialization, efficient land and sea use, standardized operations between ports and community engagement. The Baltic Transport Corridor is used for analysis. Further recommendations are made in order to facilitate the path for future research and study.

  • 120. Berggren, Magnus
    et al.
    Borgh, Markus
    Schuldt, Christian
    Lindström, Fredric
    Claesson, Ingvar
    Low-complexity network echo cancellation approach for systems equipped with external memory2011In: IEEE Transactions on Audio, Speech, and Language Processing, ISSN 1558-7916, E-ISSN 1558-7924, Vol. 19, no 8, p. 2506-2515Article in journal (Refereed)
    Abstract [en]

    Long delays and sparseness characterize impulse responses in telecommunication networks and a vast number of solutions for network echo cancellation have been proposed over the years. In this paper, an approach for detecting dispersive regions of a sparse impulse response and a proportionate normalized least mean square (PNLMS)-based selective updating approach are combined with an adaptive double-talk detector to form a complete solution for echo cancellation. The proposed solution has low computational complexity and is targeted for systems equipped with external memory.

  • 121. Berggren, Magnus
    et al.
    Stjernberg, Louise
    Lindström, Fredric
    Claesson, Ingvar
    Audio Processing Solution for Video Conference Based Aerobics2010Conference paper (Refereed)
    Abstract [en]

    In this paper an audio processing solution for video conference based aerobics is presented. The proposed solution leaves the workout music unaltered by separating it from the speech and processing each signal separately. The speech signal processing is also performed at a lower sample rate, which saves computational power. Real time evaluation of the system shows that high quality music as well as a good two-way communication is maintained during the aerobic session.

  • 122. Berglund, Johan
    Association of diagnosis of ischaemic heart disease, diabetes mellitus and heart failure with cognitive function in the elderly population.2006In: European Journal of General Practice, ISSN 1381-4788, E-ISSN 1751-1402, Vol. 12, no 3, p. 114-119Article in journal (Refereed)
    Abstract [en]

    OBJECTIVE: The aim of this study was to describe the association between ischaemic heart disease (IHD), diabetes mellitus (DM) and heart failure (HF) and the prevalence of cognitive impairment. METHODS: In a cross-sectional, community-based study in Karlskrona, Sweden, 1402 participants of the Swedish National Study on Ageing and Care (60-96 y) underwent a medical examination and psychological testing including the Mini Mental State Examination (MMSE). Of these, 58% stated that they were treated for hypertension, IHD, DM or HF, or had ECG abnormalities (positive screen). RESULTS: The prevalence of cognitive impairment (MMSE score < 24) in patients treated for IHD, DM or HF was 28.5% compared to 16.1% in the population with a negative screen without cardiovascular disease or DM. After stratification by age, the difference was seen to be due to a higher prevalence of cognitive impairment in the age group 70-79 y, where 68.8% of the cognitively impaired came from the group treated for IHD, DM or HF. The odds ratio for cognitive impairment in this age group was 4.4 (95% CI 1.7-11.4), when compared to those with a negative screen as baseline. CONCLUSION: This study has shown that the patient group treated for IHD, DM or HF has a higher prevalence of cognitive impairment and a higher risk of developing early cognitive impairment between the ages of 70 and 79 y. Although this study has not provided conclusive evidence that cardiovascular disease and DM are associated with the early development of cognitive impairment, it provides incentive for further studies.

  • 123. Berglund, Johan
    et al.
    Stjernberg, Louise
    Ornstein, Katharina
    Tykesson/Joelsson, Katarina
    Walter, Hallstein
    5-y follow-up study of patients with neuroborreliosis2002In: Scandinavian Journal of Infectious Diseases, ISSN 0036-5548, E-ISSN 1651-1980, Vol. 34, no 6, p. 421-425Article in journal (Refereed)
    Abstract [en]

    The objective of this follow-up study was to determine the long-term outcome of strictly classified cases of neuroborreliosis treated with antibiotics. A one-year prospective population-based survey of Lyme borreliosis was conducted in southern Sweden, between 1992 and 1993. A total of 349 identified cases with suspected neuroborreliosis were followed up 5 years later. Medical records were reviewed and all participants filled in a questionnaire. Of those classified with definite neuroborreliosis 114/130 completed the follow-up, of whom 111 had completed the initial antibiotic treatment. Of the 114 patients followed up, 86 (75%) had recovered completely and 70 (61%) had recovered within 6 months. Residual neurological symptoms such as facial palsy, concentration disorder, paresthesia and/or neuropathy were reported by 28/114. No significant differences between different antibiotic treatments were observed in terms of occurrence of sequelae. To conclude, we found that 25% (95% confidence interval 17-33%) of the patients suffered from residual neurological symptoms 5 years post-treatment. However, the clinical outcome of treated neuroborreliosis is favourable as only 14/114 (12%) of the patients had sequelae that influenced their daily activity post-treatment. Early diagnosis and treatment would seem to be of great importance in order to avoid such sequelae.

  • 124. Bergman, Karl
    Gränslandet: Från Roskildefreden till Maastricht. En historisk reflektion2005Other (Other academic)
    Abstract [sv]

    Artikel: Gränslandet : Från Roskildefreden till Maastricht. En historisk reflektion" Rötter och Vingar 2005, Blekinge Museum 7 s pdf-format

  • 125.
    Berhanu, Gudeta
    Blekinge Institute of Technology, School of Engineering.
    Vibration Durability Testing and Design Validation Based on Narrow Frequency Band2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Existing vibration durability testing methods for a component is conservative in verifying the fatigue strength of a component. They more of typify the damaging potential of the real world vibration, instead of the component under test. This thesis proposes a new vibration durability testing method that works by giving emphasis to the dynamic behaviour of the component. From several tests carried out at different narrow frequency bands, it develops a diagram that shows the maximum limit of a component towards vibration. Design verification will then be made by comparing the result with the real world vibration. To this aim, a test has been carried out on a truck alternator at four different frequency regions and a vibration profile has been extracted by combining them together. Then, comparing the result with the real world vibration profile, the design of the alternator has been verified. Accordingly, the alternator shows less strength at low frequency regions.

  • 126.
    Berlemann, Birte
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Rhodes, Mitch
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Sustainable IOC: Sustainable Society2005Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Impacts of the Olympic Games on the biosphere and on the communities that host them are significant. Increasing size, scope and costs, rising security concerns, cultural and environmental impacts are some of the key issues facing host cities and those cities bidding or considering bidding for the Olympic Games. One of the ideals of the Olympic Charter is to place sport at the service of the harmonious development of mankind and the three pillars of the Olympic movement are sport, culture and environment. This paper examines the IOC’s options for sustainability in its primary question: In what way could the International Olympic Committee (IOC) contribute to a global movement towards socio-ecological sustainability? The hypothesis that the IOC is an agent for social/cultural and environmental change is explored. The paper uses a principled definition of success for socio-ecological sustainability and presents a vision of a sustainable IOC and Olympic Movement within a sustainable society. From that vision specific IOC strategies along with past, present and short-term future actions are analysed to determine the obstacles and deficiencies in moving the IOC toward complying with scientifically relevant principles for socio-ecological sustainability. Systems thinking is used to identify obstacles and opportunities within the Olympic Movement. These obstacles and opportunities to strategically move the IOC toward sustainability are identified, analysed and discussed. The paper concludes with examples of possible actions the IOC could take to strategically move towards sustainability.

  • 127.
    Berner, Anita
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Lobo, Sebastian
    Blekinge Institute of Technology, School of Engineering.
    Silva, Narayan
    Blekinge Institute of Technology, School of Engineering.
    A Strategic and Transformative Approach to Education for Sustainable Development2013Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    This thesis aims to investigate what strategic guidance can be given to design transformative ESD (Education for Sustainable Development) programs in order to bring about the necessary shift away from our dominating mechanistic and transmissive educational model towards one that is transformative. ESD programs are of high importance when moving towards a more sustainable society, however, a lack of a strategic, full systems approach for planning in the field of complexity can be observed. This gap can be bridged by the use of the FSSD, the Framework for Strategic Sustainable Development, which is used as a conceptual framework throughout this paper. The field of transformative education was researched by using a mixed-methods approach, revealing what key elements and best practices are present that enable transformation to happen. The Cocoon model presented in this paper is derived from the results and intends to give strategic guidance for program designers on how to create a transformative ESD program. It is a process model that aids program designers to create the space for transformational learning to occur by strategically putting into place the elements that are conducive to transformation.

  • 128.
    Berner, Jessica
    et al.
    Blekinge Institute of Technology, School of Health Science.
    Rennemark, Mikael
    Blekinge Institute of Technology, School of Health Science.
    Jogréus, Claes
    Blekinge Institute of Technology, School of Engineering, Department of Mathematics and Natural Sciences.
    Berglund, Johan
    Blekinge Institute of Technology, School of Health Science.
    Distribution of personality, individual characteristics and internet usage in Swedish older adults2012In: Aging and Mental Health, ISSN 1360-7863 , Vol. 16, no 1, p. 119-126Article in journal (Refereed)
    Abstract [en]

    Objectives: This paper investigated factors associated with internet usage in the Swedish older adults ranging in age from 60 to 96. Personality traits and individual characteristics have been previously noted to influence internet usage, where older adults have not been the focus population. In this study the relationships between personality, individual characteristics and internet usage were investigated. Methods: A descriptive analysis of the personality tests of a total of 1402 subjects included in the Swedish National Study on Aging and Care (SNAC) was conducted. Three variables were controlled for: sex, age and education. Descriptive statistics, Mann-Whitney and Kruskal-Wallis tests, chi square tests and a logistic regression were used in order to detect the relationships with internet usage. Results: Men differ significantly from women in the personality traits analysis. Those with higher education were more open and neuroticism was lower in the oldest older adults. Internet usage declined significantly with age and those with middle to higher education were using the internet the most. No other associations with internet use were found Conclusion: Personality traits and individual characteristics do not seem to influence the Swedish older adult and their internet usage. What one needs to account for is the age and education of the person. The more educated and the youngest cohorts were using the internet more frequently.

  • 129.
    Berner, Jessica
    et al.
    Blekinge Institute of Technology, School of Health Science.
    Rennemark, Mikael
    Blekinge Institute of Technology, School of Health Science.
    Jogréus, Claes
    Blekinge Institute of Technology, School of Engineering, Department of Mathematics and Natural Sciences.
    Berglund, Johan
    Blekinge Institute of Technology, School of Health Science.
    Factors associated with change in Internet usage of Swedish older adults (2004-2010)2013In: Health Informatics Journal, ISSN 1460-4582, E-ISSN 1741-2811, Vol. 19, no 2, p. 152-162Article in journal (Refereed)
    Abstract [en]

    The increased reliance on Internet use in social functions has presumably left out a part of the population: the oldest-older adults. These are people who have not kept themselves up to date with the technological developments for various reasons. There are, however, exceptions from whom we have something to learn. This study investigates the older people in Sweden who started to use the Internet over a period of 6 years. Cognition, extraversion, openness, functional disability, household economy, sex, age and education were investigated in relation to starting to use the Internet. A chi-square test, Spearman correlation and a logistic regression analysis were conducted. It was found that higher cognition, being male and being between the ages of 60 and 80 years were determining factors in starting to use the Internet for the Swedish older adult. Our results indicate that the oldest-older adults are slow to adapt to using the Internet and more attention should be paid on how to support this group.

  • 130. Bertoni, Alessandro
    et al.
    Bertoni, Marco
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Isaksson, Ola
    Value visualization in Product Service Systems preliminary design2013In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 53, p. 103-117Article in journal (Refereed)
    Abstract [en]

    Emerging from a study in the European aerospace industry, this paper identifies a gap in the way value-related information is communicated to designers of hardware in the preliminary stages of Product Service System (PSS) design. To fit this gap a Lifecycle Value Representation Approach, named LiVReA, that uses color-coded 3D CAD models to enable value information to be translated into visual features, is presented. Such approach aims at enhancing designers' awareness of the value contribution of an early design concept on the overall PSS offer by complementing requirements-based information with criteria reflecting the fulfillment of customers and system value. The paper details the development of the approach, its underlying rationale, the results of preliminary validation activities and the potential for industrial application in the light of the currently available PSS representation tools

  • 131.
    Bertoni, Marco
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Bertoni, Alessandro
    Broeze, Henk
    Dubourg, Gilles
    Sundhurst, Clive
    Using 3D CAD models for value visualization: an approach with SIEMENS NX HD3D Visual Reporting2014In: Computer-Aided Design and Applications, ISSN 1686-4360, Vol. 11, no 3, p. 284-294Article in journal (Refereed)
    Abstract [en]

    Recent literature in Systems Engineering has suggested the use of “value” to drive decision-making activities during preliminary design, in particular when choosing technologies and components for a complex system. However, to correctly evaluate design trade-offs, a visual link has to be established between the results of the value model and a product shape/geometry. This paper proposes the use of color-coded 3D CAD models to support the visualization of value analysis results in a Stage-Gate® process. The approach has been developed and exemplified within a case study related to the design of an aero-engine component, and has been demonstrated using SIEMENS NX HD3D Visual Reporting. The results of verification activities conducted in a laboratory setting show that the use of color-coded 3D CAD models increases the decision makers’ awareness of value-related information in a Stage-Gate process.

  • 132.
    Bertoni, Marco
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Bertoni, Alessandro
    Isaksson, Ola
    Amnell, Henrik
    Johansson, Christian
    Value-oriented concept selection in aero-engine sub-systems design: the EVOKE approach2013Conference paper (Refereed)
    Abstract [en]

    Value Driven Design methodologies extend the Requirements Management and Systems Engineering processes to reduce time and costs needed to identify the right solution direction to be pursued in detailed design. Emerging from the findings of an EU FP7 research project, the paper describes an approach, named EVOKE, that uses value as a basis for preliminary concept selection in the design of system components. EVOKE takes as input a list of value dimensions and drivers communicated by the system integrators, together with information about the high-level engineering characteristics of a candidate design, to enable early stage value analysis to be executed the by sub-system manufacturers. The approach and its technological enablers are described in detail through the use of a case study related to the design of new intermediate compressor case for turbofan engines.

  • 133.
    Bertoni, Marco
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Eres, Hakki
    Scanlan, Jim
    Co-creation in complex supply chains: the benefits of a Value driven Design approach2014In: Product Development in the Socio-sphere: Game Changing Paradigms for 21st Century Breakthrough Product Development and Innovation / [ed] Schaefer, Dirk, Switzerland: Springer International Publishing , 2014Chapter in book (Refereed)
    Abstract [en]

    In the last decade, as the manufacturing companies have reconsidered the overall concept of goods production, their focus shifted from developing ‘products’ to ‘solutions’. In complex supply chains, the combination of products and services that maximize customers’ and stakeholders’ value can be identified only if manufacturers improve their ability to co-create, establishing more interactive relationships with end users, clients and sub-contractors. Methodologies for Value Driven Design (VDD) are emerging as enablers for cross-functional and cross-organizational knowledge sharing, reinforcing early stages design iterations to emphasize the maturation of the requirements across supply chain levels. This chapter highlights the uptake of VDD in a traditionally protective domain, such as the aerospace sector. It describes methods and tools for value assessment, and points toward the most relevant initiatives in this domain. Eventually, it discusses areas of further research to promote the effective use of the VDD methodology while designing complex engineering systems.

  • 134.
    Bertoni, Marco
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Hallstedt, Sophie
    Blekinge Institute of Technology, School of Engineering, Department of Strategic Sustainable Development.
    Isaksson, Ola
    Value assessment of sustainability hotspots in conceptual design: an aerospace study.2014Conference paper (Refereed)
    Abstract [en]

    Nowadays, when designing structural aero-engine components, the engineering team does not only deal with aerodynamics and structural mechanics criteria. Rather, it needs to make more informed decisions based on the value and sustainability contribution of a design concept. This paper proposes a novel approach that combines qualitative sustainability assessment techniques, which are Environmental Impact Assessment (EIA) and Strategic Sustainability Assessment (SSA), with Net Present Value (NPV) analysis to facilitate early stage decision-making in design. A case study, related to the development of a new high-temperature aero-engine component, illustrates how EIA and SSA identify sustainability hotspots for a new product technology, and how NPV is used to assess alternative solution strategies within the hotspot. Within the studied case, the milling process was identified as a sustainability hotspot, therefore two process options - Electro-Chemical Milling (ECM) and Mechanical Milling (MM) - where benchmarked by calculating their NPV in alternative future scenarios, featuring different market and regulatory assumptions. The approach and its constituting models have been preliminarily verified with designers and process owners in co-located industrial workshops.

  • 135. Bertoni, Marco
    et al.
    Johansson, Christian
    Larsson, Tobias
    Methods and Tools for Knowledge Sharing in Product Development2011In: Innovation in Product Design: From CAD to Virtual Prototyping / [ed] Bordegoni, Monica; Rizzi, Caterina, New York: Springer , 2011, p. 37-53Chapter in book (Refereed)
    Abstract [en]

    The emerging industrial business partnerships, which feature cross-functional and cross-company development efforts, raise the barrier for the establishment of effective knowledge sharing practices in the larger organization. This chapter aims to highlight the role of knowledge as a key enabler for effective engineering activities in the light of such emerging enterprise collaboration models. Knowledge Enabled Engineering (KEE) is presented as an approach to enhance the extended organization’s capability to establish effective collaboration among its parts, in spite of different organizational structures, technologies or processes. KEE is analysed in its constituent parts, highlighting areas, methods and tools that are particularly interesting for leveraging companies’ knowledge sharing capabilities.

  • 136. Bertoni, Marco
    et al.
    Larsson, Andreas
    Ericson, Åsa
    Chirumalla, Koteshwar
    Larsson, Tobias
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Isaksson, Ola
    Randall, Dave
    The rise of social product development2012In: International Journal of Networking and Virtual Organisations, ISSN 1470-9503, Vol. 11, no 2, p. 188-207Article in journal (Refereed)
    Abstract [en]

    The aim of the paper is to discuss the rising potential of social software to increase the knowledge management capabilities of virtual product development teams. It presents six fundamental transitions, elaborated from the empirical findings, which justify the rise of a more bottom-up, social creation and sharing of engineering knowledge in the virtual organisation. The study suggests that traditional engineering knowledge management approaches alone are not sufficient to support development activities in the virtual organisation, and that such teams display an increasing demand for social, comparatively lightweight and remixable platforms for bottom-up, social creation and sharing of knowledge.

  • 137.
    Bhuiya, Monirul Islam
    et al.
    Blekinge Institute of Technology, School of Engineering.
    Rakib, Mohammad Ahsan
    Blekinge Institute of Technology, School of Engineering.
    Performance Evaluation of DHTs for Mobile Environment2010Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Distributed Hash Table (DHT) systems are an important part of peer-to-peer routing infrastructures. They enable scalable wide-area storage and retrieval of information, and will support the rapid development of a wide variety of Internet-scale applications ranging from naming systems and file systems to application-layer multicast. A lot of research about peer-to-peer systems, today, has been focusing on designing better structured peer-to-peer overlay networks or Distributed Hash Tables (DHTs). As far as we concern, not so many papers, however, have been published in an organized way to check the adaptability of the existing four DHTs namely Content Addressable Network (CAN), Chord, Pastry and Tapestry for mobile environments. This thesis presents an attempt to evaluate the performances of these DHTs including adaptability with mobile environments. For this we survey these DHTs including existing solutions and based on that we decide our own conclusion.

  • 138.
    Bhutto, Tarique Inayat
    Blekinge Institute of Technology, School of Engineering.
    Root LDPC Codes for Non Ergodic Transmission Channels2011Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    4 ABSTRACT Tremendous amount of research has been conducted in modern coding theory in the past few years and much of the work has been done in developing new coding techniques. Low density parity check (LDPC) codes are class of linear block error correcting codes which provide capacity performance on a large collection of data transmission and storage channels while Root LDPC codes in this thesis work are admitting implementable decoders with manageable complexity. Furthermore, work has been conducted to develop graphical methods to represent LDPC codes. This thesis implement one of the LDPC kind “Root LDPC code” using iterative method and calculate its threshold level for binary and non-binary Root LDPC code. This threshold value can serve as a starting point for further study on this topic. We use C++ as tool to simulate the code structure and parameters. The results show that non-binary Root LDPC code provides higher threshold value as compare to binary Root LDPC code.

  • 139.
    Bisong, Ayambe
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Social Sustainability in Africa: The case of Cameroon2005Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    The aim of this research is to examine how Africa can become a socially sustainable society by the year 2030 using a strategic leadership approach with Cameroon as a case study. Using a generic and whole systems view, the study would examine the possibility of a transition from a socially un-sustainable society to sustainable society. The study analyses the current political, economic, social and environmental operations that undermines people’s ability to meet their basic needs. It also highlights some of the strengths and opportunities of the Cameroonian society that can help accelerate this transition. Threats and weaknesses are also identified and corrective measures are proposed. Agriculture and social capacity building amongst others stand out as prominent opportunities which could be use to further strategic progress towards sustainability. The study concludes that, with a well defined vision, it is possible for Cameroon to strategically progress towards a socially sustainable society.

  • 140.
    Biswas, Md Abdul Matin
    Blekinge Institute of Technology, School of Engineering.
    Exploiting the Direct Communication Link for Enhancing Effective Capacity Performance of Cognitive Radio Relay Networks2014Independent thesis Advanced level (degree of Master (Two Years))Student thesis
    Abstract [en]

    Nowadays, cognitive radio (CR) is a promising concept to improve the radio spectrum exploitation. CR has tremendous ability to enhance spectrum efficiency by allowing secondary users (SUs) to access licensed radio spectrum resource which is currently not being used by primary users (PUs). One basic challenge of that paradigm is securing the quality of service (QoS) of the primary link transmission while increasing the rate of the secondary links transmission. Cooperative relaying is an encouraging technology which offers the opportunity to maximize the transmission diversity gain significantly in the rapid development growth of wireless communication which contains cognitive radio networks. On the other hand, effective capacity (EC) which is designed to provide a maximum constant arrival rate that a statistical wireless channels can support while satisfying statistical QoS requirements. In this thesis, the performance enhancement analysis of cognitive radio relay network (CRRN) by exploiting the direct communication link has been investigated in Rayleigh fading channel where peak interference power constraint is taken into consider. A spectrum sharing technique is considered in this thesis where a restriction of spectrum sharing is applied by the PUs. Here, an SU can coexist simultaneously with the PU for transmitting data as long as a certain threshold on the peak interference power applied on the primary receiver is not overstepped by the SUs transmission. In addition, it is supposed that there are multiple intermediate relay nodes available to transmit their signal to the destination along with a direct communication link for secondary transmission. Moreover, the SU transmission has to meet a random delay QoS constraint. By providing this QoS constraint, the maximum arrival data rate of SUs can be achieved with small error of probability. Specifically, this thesis also acquires closed-form expressions of EC for CRRN. It is evident that if the channel quality and the interference threshold set by the PU are changed, then the capacity of the channel is also to be changed. In addition, it is also verified that the direct communication link together with multiple relay nodes has significantly higher capacity gains compare to non-direct communication link for CRRN. Matlab simulations are presented to find out theoretical results and Monte-Carlo simulations are carried out to support these numerical results. Both the simulation results and the analytical results match very well.

  • 141.
    Bitterman, Michal
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Lopez, Viviana
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Wright, Fiona
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    A Bridge to Peace: Strategic Sustainable Development as an approach to Conflict Resolution2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Abstract: This thesis argues that taking a strategic sustainable development (SSD) approach to conflict resolution in areas of the world in long-term intractable conflict with intermittent violence could support an effective process and lasting outcome. SSD proposes a holistic systems perspective and decision-making framework to address challenges and opportunities at the largest scale, including identifying root causes and drivers of the conflict as well as finding common ground internally and externally. The currently unbalanced dynamics between the two fundaments of sustainability, a robust ecosystem and social fabric, are the basis of deeply unsustainable patterns of behaviour which are often also at the heart of conflicts. Socio-ecological unsustainability can be both a threat, and an opportunity for resolution and social change. The framework offers a proven way of organizing, evaluating and using tools that can aid in dealing with sustainability issues constructively, and evidence is presented to suggest its usage can be extended to conflict issues. This thesis analyzes the links between sustainability, strategic sustainable development and conflict resolution work in the areas of conflict described, and proposes a set of guidelines for approaching conflict resolution with SSD.

  • 142. Bjerkén, Christina
    et al.
    Kao-Walter, Sharon
    Ståhle, Per
    Fracture Mechanisms of a Thin Elastic Plastic Laminate2006Conference paper (Refereed)
    Abstract [en]

    The fracture toughness of a polymer-metal laminate composite is obtained by mechanical testing of a specimen containing a pre-crack. The laminate is a material used for packaging. It consists of a thin aluminium foil and a polymer coating. A centre cracked panel test geometry is used. Each of the layers forming the laminate is also tested separately. The result is compared with the measured fracture strength of the individual layers. It is observed that the load carrying capacity increases dramatically for the laminate. At the strain when peak load is reached for the laminate only aluminium is expected to carry any substantial load because of the low stiffness of the LDPE. However, the strength of the laminate is almost twice the strength of the aluminium foil. The reason seems to be that the aluminium forces the polymer to absorb large quantities of energy at small nominal strain. The toughness compares well with the accumulated toughness of all involved layers. Possible fracture of the interface between the layers is discussed.

  • 143.
    Bjurka, Mattias
    Blekinge Institute of Technology, School of Engineering.
    New Splash Guards2012Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    This final report is the result of cooperation between Cargotec and the Department of Mechanical Enginering at Blekinge Institute of Technology. The project is named New splash guards Splash guards have the order to avoid dirtying of the machine. The thesis is to find alternative solutions to splash on Cargotec's trucks. Evaluate the various materials and methods for the design of the splash guard. The purpose is to find a solution that fits all machines and has better performance than the current solution.

  • 144. Björklund, Svante
    Space-time adaptive processing with a half-cylinder faceted conformal antenna2009Conference paper (Refereed)
    Abstract [en]

    Conformal antennas, which assumes the shape of the platform, have several advantages, like reduced weight and space; aerodynamic design and increased field of view. We are interested in detection of moving ground targets with air-borne radar with three antenna geometries: faceted or smooth vertical half-cylinder and plane forward-looking. We study important clutter properties for suppressing the clutter with STAP (Space-Time Adaptive Processing) and find that the subarray division is more important than the antenna element positions, that the faceted and smooth antennas give similar clutter properties and that all three geometries have better clutter properties the smaller the subarrays are. The largest tested subarrays are probably useless for clutter suppression.

  • 145. Björklund, Svante
    et al.
    Boman, Tomas
    Nelander, Anders
    Clutter properties for STAP with smooth and faceted cylindrical conformal antennas2010Conference paper (Refereed)
    Abstract [en]

    Conformal antennas, which assume the shape of the platform, have several advantages; like reduced weight and space, aerodynamic design and increased field of view. We are interested in detection of moving ground targets with air-borne radar with faceted or smooth vertical half-cylinder or planar antennas with different subarray sizes. We simulate radar systems and study clutter properties which are important for suppressing the clutter with STAP (Space-Time Adaptive Processing), properties by which we can compare the antennas. We use old analysis tools and propose some new which are easy to interpret and draw conclusions from. We find that the faceted and smooth half-cylinder antennas have no significant differences in clutter suppression performance. The plane antenna has poorer performance. The subarray division is more important than the antenna geometry. The number of antenna channels is related to the clutter rank and the clutter fraction of the signal space

  • 146. Björklund, Svante
    et al.
    Nelander, Anders
    Fast-Time STAP for clutter suppression between transmitter and receiver in bistatic radar2009Conference paper (Refereed)
    Abstract [en]

    Detection and localization of ground targets in the region between the transmitter and the receiver in bistatic radar is difficult due to strong interference from surface clutter and the direct transmitter signal. We have simulated fast-time (using channels of an array antenna and range bins) and slow-time (antenna channels and radar pulses) STAP (Space Time Adaptive Processing) and find that fast-time gives better interference suppression in this region. We also see that fast-time STAP is useful for all four cases of stationary/moving radar and stationary/moving target and that slow-time STAP with moving radar is useful for both stationary and moving target.

  • 147.
    Björklund, Svante
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Nelander, Anders
    Pettersson, Mats
    Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
    Auxiliary beam terrain-scattered interference suppression: reflection system and radar performance2013In: IET Radar, Sonar & Navigation, ISSN 1751-8784, Vol. 7, no 8, p. 836-847Article in journal (Refereed)
    Abstract [en]

    Terrain-scattered interference (TSI), that is, jammer signals reflected on the earth's surface, is a significant problem to military airborne radar. In auxiliary beam TSI suppression, the TSI in the main radar beam is estimated by a single or several auxiliary beams and is subtracted from the main beam channel. The signal to subtract is the auxiliary beam signals fed through an estimate of the ‘reflection system’, which describes scattering on the surface. The authors first present results on the structure of this TSI suppression, on the estimation of the reflection system and on the quality of the estimate. Then the authors derive theoretical expressions for the signal-to-interference plus noise ratio (SINR) and the remaining TSI power for a single auxiliary beam. Since the SINR is directly connected to the radar performance, it can be seen what factors affect the performance and how. It was noted that when the estimated reflection system is missing one or more delays of the true system, the TSI filter cannot suppress the TSI signal completely. This phenomenon, which is called ‘TSI leakage’, has a very large impact on the performance. The SINR cannot be kept constant. Instead, an ‘SINR improvement’ can be defined.

  • 148.
    Björnsson, Jens
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Kroon, Marcus
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Nilsson, Mats
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Högmonterat avgassystem2004Independent thesis Basic level (degree of Bachelor)Student thesis
    Abstract [en]

    This report considers our thesis work that was implemented in cooperation with Metso Dynapac. The assignment was to construct a high mounted exhaust system for the CA 252/302/402-Vibratory Roller. Today’s exhaust system is pointed backwards and ends under and below the radiator. A high mounted muffler system is available as an option and is attached to the standard muffler system. The main problem with the placement of the existing muffler, is that it makes it difficult for the cooling air to pass through the engine-room. This makes that an unnecessary large fan is needed to get enough air passage through the radiator. Another problem is that a high mounted muffler system is available as an option. Dynapac wants one muffler system and one part number. We used Fredy Olsson’s model for principle and primary construction to construct a new muffler system. In the phase of the principle construction the product was defined according to the PPOME method. Different proposals was presented and evaluated against the criterions. Two proposals went on to the phase of primary construction were a complete solution of the problem were presented.

  • 149.
    Blandford, Nicholas
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Nash, Timothy
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Winter, André
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Strategic Sustainable Investing: Recognizing Value in Transitional Leadership2008Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    Institutional Investors own a large share of publicly traded companies, controlling a significant amount of the economy‟s working capital. These investors currently use little or no sustainability-related information to make their decisions, reinforcing a loop of increasingly unsustainable growth. This paper puts forward a new investment strategy that recognizes true movement towards sustainability and its link with bottom line benefits for investors: Strategic Sustainable Investing (SSI). To achieve this desired future, Institutional Investors must be able to recognize corporations that are strategically leading the transition towards sustainability. An Analysis Tool was developed to help address this need by identifying sectoral Emerging Sustainability Issues (ESI) using a consensus-based scientific definition of sustainability. Once ESIs are identified, companies‟ strategies regarding each issue are assessed. This Tool was scrutinized by a panel of experts in the financial and sustainable development industries, and was tested on three companies within the Unconventional Oil & Gas Sector in Canada. Results confirmed the usefulness of a tool that can recognize which companies are leading the sustainable development agenda, and identified the need for future research on the financial materiality of sustainability-oriented actions.

  • 150.
    Blankenship, Heidi
    et al.
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Kulhavý, Viktor
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Lagneryd, Jonas
    Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
    Introducing Strategic Sustainable Development in a business incubator2007Independent thesis Advanced level (degree of Master (One Year))Student thesis
    Abstract [en]

    This qualitative action research explores integration of Strategic Sustainable Development (SSD) at Inova business incubator (Karlstad, Sweden). Researchers and incubator agreed that planning with sustainability in mind at a very early stage of company development may have important impacts on future business success and societal welfare. The objective was to answer how SSD could be integrated into the processes at Inova and how Inova staff’s and entrepreneurs’ understanding of sustainability demonstrably evolve after exposure to SSD. Apart from general research methods, SSD methods and tools were used with three entrepreneurs and business incubator staff. The Five Level Framework for Planning and Decision-making in complex systems and the Templates for Sustainable Product Development approach were central to the study. Inova staff and entrepreneurs began to develop; an understanding of business’ dependence on and relationship to broader societal and ecological systems; and an ability to use backcasting from the basic socio-ecological principles of sustainability in business planning. In turn they experienced an increased capacity to identify sustainability related business risks and opportunities. A new incubation process integrating SSD was created. Although the outcome is specific to Inova, it is general enough for other assistance organizations to gain insight from. In conclusion, SSD should be integrated as early as possible in the business planning of start up companies. Organizations with a mission of assisting entrepreneurs have an important role to play In further research it is recommended that visionary sustainability leaders are identified and tracked from start up.

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