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  • 1. Al-Moathin, Ali Hussain Hassan
    Modeling of Photovoltaic Power System2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 2.
    Alves, G. R.
    et al.
    Natércia Lima Polytechnic of Porto, PRT.
    Felgueiras, M.
    Natércia Lima Polytechnic of Porto, PRT.
    Viegas, C.
    Natércia Lima Polytechnic of Porto, PRT.
    Fidalgo, A.
    Natércia Lima Polytechnic of Porto, PRT.
    Castro, M.
    Universidad Nacional de Educación a Distancia, ESP.
    García-Zubía, J.
    niversidad de Deusto, ESP.
    Pester, A.
    Carinthia University of Applied Sciences, AUT.
    Pavani, A.
    Pontifícia Universidade Católica do Rio de Janeiro, BRA.
    Fernandez, R.
    Universidad Nacional de Santiago del Estero, ARG.
    Kulesza, Wlodek
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Pozzo, M. I.
    IRICE-CONICET, ARG.
    Oliveira, V.
    Universidade Federal de Juiz de Fora, BRA.
    Silva, J. B.
    Universidade Federal de Santa Catarina, BRA.
    Marchisio, S.
    Universidad Nacional de Rosario, ARG.
    Schlichting, L. C. M.
    nstituto Federal de Santa Catarina, BRA.
    A sustainable approach to let students do more real experiments with electrical and electronic circuits2018In: SIXTH INTERNATIONAL CONFERENCE ON TECHNOLOGICAL ECOSYSTEMS FOR ENHANCING MULTICULTURALITY (TEEM'18) / [ed] GarciaPenalvo, FJ, Association for Computing Machinery , 2018, p. 508-514Conference paper (Refereed)
    Abstract [en]

    The present paper focus on the use of remote laboratories in higher education from a sustainability viewpoint. The particular case of engineering education, and, within it, the more specific subject of experiments with electrical and electronic circuits is presented first, to then discuss the benefits of using remote labs, while considering the three dimensions of sustainable development, i.e.: economic practice, environmental protection, and social integration. The paper debates how remote labs address each dimension. © 2018 Copyright is held by the owner/author(s). Publication rights licensed to ACM.

  • 3.
    Anwar, Mahwish
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Connect2smallports Project: South Baltic Small Ports – Gateway to Integratedand Sustainable European Transport System: Project brief and updates on the project activities: Digital Audit. Blockchain Design Strategy. Call for Collaboration. Reports and scientific publications.2019Other (Other (popular science, discussion, etc.))
    Abstract [en]

    Ports play pivotal role in the global supply chain network. To strengthen the ports’ business and to keep up with the overall economic development of the country, the port stakeholders have started to invest in the digital technologies. The ports as well as the individual municipalities in Europe are in contest with other ports within the region. One of the competing factors is that of the port’s technological development. Unlike large ports, the small ports within Europe, for example Port of Karlskrona, Port of Wismar or Port of Klaipeda, which also serve as crucial nodes within the trade flow for Sweden, Germany and Lithuania respectively, lack the knowledge and tools to leverage the potential of digital technologies. The digital disruption at ports is inevitable!

    With that being established the scope of the project - South Baltic Small Ports as Gateways towards Integrated Sustainable European Transport System and Blue Growth by Smart Connectivity Solutions – or Connect2SmallPorts project is to understand how to facilitate small and medium ports of the South Baltic region with the digital technologies - Blockchain and Internet of Things. During the project lifetime (2018 to 2021) the main goals are to perform the digital audit of small ports of the South Baltic region; to prepare an implementation strategy for Blockchain and Internet of Things specifically for the small ports in the South Baltic region and to conduct an evaluation of the proposed strategies. The project correspondingly aims to disseminate the knowledge and experiences through research publications, industrial conferences and international tradeshows.

  • 4.
    Anwar, Mahwish
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Digitalization in Container Terminal Logistics: A Literature Review2019In: 27th Annual Conference of International Association of Maritime Economists (IAME), 2019, p. 1-25, article id 141Conference paper (Refereed)
    Abstract [en]

    Many terminals that are located in large ports, such as Port of Rotterdam, Port of Singapore, Port of Hamburg, etc. employ various emerging digital technologies to handle container and information. Some technologies deemed attractive by large ports are: Artificial Intelligence (AI), Cloud Computing, Blockchain and Internet of Things (IoT). The objective of this paper is to review the “state-of-the-art” of scientific literature on digital technologies that facilitate operations management for container terminal logistics. The studies are synthesized in form of a classification matrix and analysis performed. The primary studies consisted of 57 papers, out of the initial pool of over 2100 findings. Over 94% of the publications identified focused on AI; while 29% exploited IoT and Cloud Computing technologies combined. The research on Blockchain within the context of container terminal was nonexistent. Majority of the publications utilized numerical experiments and simulation for validation. A large amount of the scientific literature was dedicated to resource management and scheduling of intra-logistic equipment/vessels or berth or container storage in the yard. Results drawn from the literature survey indicate that various research gaps exist. A discussion and an analysis of review is presented, which could be of benefit for stakeholders of small-medium sized container terminals.

  • 5.
    Anwar, Mahwish
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Henesey, Lawrence
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Casalicchio, Emiliano
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    The feasibility of Blockchain solutions in the maritime industry2019Conference paper (Other academic)
    Abstract [en]

    Purpose / Value

    The concept of Blockchain technology in supply chain management is well discussed, yet

    inadequately theorized in terms of its applicability, especially within the maritime industry,

    which forms a fundamental node of the entire supply chain network. More so, the assumptive

    grounds associated with the technology have not been openly articulated, leading to unclear

    ideas about its applicability.

    Design/methodology/approach

    The research is designed divided into two Stages. This paper (Stage one) enhanced

    literature review for data collection in order to gauge the properties of the Blockchain

    technology, and to understand and map those characteristics with the Bill of Lading

    process within maritime industry. In Stage two an online questionnaire is conducted to

    assess the feasibility of Blockchain technology for different maritime use-cases.

    Findings

    The research that was collected and analysed partly from deliverable in the

    Connect2SmallPort Project and from other literature suggests that Blockchain can be an

    enabler for improving maritime supply chain. The use-case presented in this paper highlights

    the practicality of the technology. It was identified that Blockchain possess characteristics

    suitable to mitigate the risks and issues pertaining to the paper-based Bill of Lading process.

    Research limitations

    The study would mature further after the execution of the Stage Two. By the end of both

    Stages, a framework for Blockchain adoption with a focus on the maritime industry would

    be proposed.

    Practical implications

    The proposed outcome indicated the practicality of technology, which could be beneficial

    for the port stakeholders that wish to use Blockchain in processing Bill of Lading or

    contracts.

    Social implications

    The study may influence the decision makers to consider the benefits of using the Blockchain

    technology, thereby, creating opportunities for the maritime industry to leverage the

    technology with government’s support.

  • 6.
    Arvidsson, Mattias
    Blekinge Institute of Technology, School of Computing.
    Säkerhetsmedvetenhet: En kvantitativ studie beträffande mätning av säkerhetsmedvetenhet hos medarbetare2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Denna rapport syftar till att besvara tre frågeställningar; går det att mäta säkerhetsmedvetenhet, vilka variabler påverkar säkerhetsmedvetenheten samt är skillnaderna i variablerna signifikanta. Undersökningen har genomförts i en region och av yrkeskategorin brevbärare, inom företaget Posten Meddelande AB. För att besvara de tre frågeställningarna har en omfattande enkätundersökning genomförts på tio arbetsplatser, där ett dataunderlag på 164 svar inhämtats.  Underlaget har indexerats till ett index som är avsett att beskriva hur god säkerhetsmedvetenhet de svarande har. Säkerhetsmedvetenhetsindexet har sedan analyserats med olika sambandsanalyser för att se om de oberoende variablerna påverkar resultatet. Totalt har sju oberoende variabler analyserats, och av dessa har fem påverkat resultatet.  Till sist har dessa fem testats med medelvärdes- och variansanalyser för att se om skillnaderna i grupperna är signifikanta. Resultatet av det visar att skillnaderna är signifikanta och i princip alla med mer hög tillförlitlighet. Slutsatsen av dessa analyser är att äldre personer som jobbat länge inom Posten Meddelande och genomgått en säkerhetsutbildning har statistiskt säkerställt bättre säkerhetsmedvetenhet. Då ålder och erfarenhet är omöjligt att erhålla på kort sikt, anser författaren att den viktigaste framgångsfaktorn för att uppnå god säkerhetsmedvetenhet är att alla inom företaget bör genomgå en säkerhetsutbildning.

  • 7.
    Badampudi, Deepika
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Towards decision-making to choose among different component origins2016Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Context: The amount of software in solutions provided in various domains is continuously growing. These solutions are a mix of hardware and software solutions, often referred to as software-intensive systems. Companies seek to improve the software development process to avoid delays or cost overruns related to the software development.  

    Objective: The overall goal of this thesis is to improve the software development/building process to provide timely, high quality and cost efficient solutions. The objective is to select the origin of the components (in-house, outsource, components off-the-shelf (COTS) or open source software (OSS)) that facilitates the improvement. The system can be built of components from one origin or a combination of two or more (or even all) origins. Selecting a proper origin for a component is important to get the most out of a component and to optimize the development. 

    Method: It is necessary to investigate the component origins to make decisions to select among different origins. We conducted a case study to explore the existing challenges in software development.  The next step was to identify factors that influence the choice to select among different component origins through a systematic literature review using a snowballing (SB) strategy and a database (DB) search. Furthermore, a Bayesian synthesis process is proposed to integrate the evidence from literature into practice.  

    Results: The results of this thesis indicate that the context of software-intensive systems such as domain regulations hinder the software development improvement. In addition to in-house development, alternative component origins (outsourcing, COTS, and OSS) are being used for software development. Several factors such as time, cost and license implications influence the selection of component origins. Solutions have been proposed to support the decision-making. However, these solutions consider only a subset of factors identified in the literature.   

    Conclusions: Each component origin has some advantages and disadvantages. Depending on the scenario, one component origin is more suitable than the others. It is important to investigate the different scenarios and suitability of the component origins, which is recognized as future work of this thesis. In addition, the future work is aimed at providing models to support the decision-making process.

  • 8.
    Barbosa, Ludwig
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Rasch, J.
    Molflow, Gothenburg, SWE.
    Carlstrom, A.
    RUAG Space AB, SWE.
    Pettersson, Mats
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Vu, Viet Thuy
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    A Simulation Study of the Effect of Ionospheric Vertical Gradients on the Neutral Bending Angle Error for GNSS Radio Occultation2017In: Progress in Electromagnetics Research Symposium, IEEE , 2017, p. 1540-1545Conference paper (Refereed)
    Abstract [en]

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

  • 9.
    Bechter, Jonathan
    et al.
    Ulm Univ, DEU.
    Rameez, Muhammad
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Waldschmidt, Christian
    Ulm Univ, DEU.
    Analytical and Experimental Investigations on Mitigation of Interference in a DBF MIMO Radar2017In: IEEE transactions on microwave theory and techniques, ISSN 0018-9480, E-ISSN 1557-9670, Vol. 65, no 5, p. 1727-1734Article in journal (Refereed)
    Abstract [en]

    As driver assistance systems and autonomous driving are on the rise, radar sensors become a common device for automobiles. The high sensor density leads to the occurrence of interference, which decreases the detection capabilities. Here, digital beamforming (DBF) is applied to mitigate such interference. A DBF system requires a calibration of the different receiving channels. It is shown how this calibration completely changes the DBF beam pattern required to cancel interferences, if the system has no IQ receiver. Afterward, the application of DBF on a multiple-input multiple-output (MIMO) radar is investigated. It is shown that only the real aperture and not the virtual one can be used for interference suppression, leading to wide notches in the pattern. However, for any target the large virtual aperture can be exploited, even if interferers are blinded out. Moreover, the wide notches for interference suppression of the real aperture appear narrow in the virtual aperture for target localization. The results are verified by measurements with time-multiplexing MIMO radar.

  • 10.
    Bjorklund, Svante
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Johansson, Tommy
    Swedish Def Res Agcy FOI, SE-58111 Linkoping, Sweden..
    Petersson, Henrik
    Swedish Def Res Agcy FOI, SE-58111 Linkoping, Sweden..
    Target Classification in Perimeter Protection with a Micro-Doppler Radar2016In: 2016 17TH INTERNATIONAL RADAR SYMPOSIUM (IRS), 2016Conference paper (Refereed)
    Abstract [en]

    In security surveillance at the perimeter of critical infrastructure, such as airports and power plants, approaching objects have to be detected and classified. Especially important is to distinguish between humans, animals and vehicles. In this paper, micro-Doppler data (from movement of internal parts of the target) have been collected with a small radar of a low complexity and cost-effective type. From time-velocity diagrams of the data, some physical features have been extracted and used in a support vector machine classifier to distinguish between the classes "human", "animal" and "man-made object". Both the type of radar and the classes are suitable for perimeter protection. The classification result are rather good, 77% correct classification. Particularly interesting is the surprisingly good ability to distinguish between humans and animals. This also indicates that we can choose to have limitations in the radar and still solve the classification task.

  • 11.
    Björklund, Svante
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Clutter Properties for a Side-Looking Radar with Planar Regular and Irregular Subarrays2015In: 2015 16TH INTERNATIONAL RADAR SYMPOSIUM (IRS), 2015, p. 730-735Conference paper (Refereed)
    Abstract [en]

    The effect of the subarray design in a side-looking moving radar with a planar antenna on some clutter properties which are important for suppressing the clutter with STAP (Space-Time Adaptive Processing) is investigated by simulations. These properties are interference DOA Doppler Spectrum (DDS) and clutter rank. The conclusions from the work is that irregular antennas give less clutter in the DDS and that larger subarrays give lower clutter rank.

  • 12.
    Björklund, Svante
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Grahn, Per
    Nelander, Anders
    Pettersson, Mats
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Measurement of Rank and Other Properties of Direct and Scattered Signals2016In: International Journal of Antennas and Propagation, ISSN 1687-5869, E-ISSN 1687-5877, Vol. 2016, article id 5483547Article in journal (Refereed)
    Abstract [en]

    We have designed an experiment for low-cost indoor measurements of rank and other properties of direct and scattered signals with radar interference suppression in mind. The signal rank is important also in many other applications, for example, DOA (Direction of Arrival) estimation, estimation of the number of and location of transmitters in electronic warfare, and increasing the capacity in wireless communications. In real radar applications, such measurements can be very expensive, for example, involving airborne radars with array antennas. We have performed the measurements in an anechoic chamber with several transmitters, a receiving array antenna, and a moving reflector. Our experiment takes several aspects into account: transmitted signals with different correlation, decorrelation of the signals during the acquisition interval, covariance matrix estimation, noise eigenvalue spread, calibration, near-field compensation, scattering in a rough surface, and good control of the influencing factors. With our measurements we have observed rank, DOA spectrum, and eigenpatterns of direct and scattered signals. The agreement of our measured properties with theoretic and simulated results in the literature shows that our experiment is realistic and sound. The detailed description of our experiment could serve as help for conducting other well-controlled experiments. © Copyright 2016 Svante Björklund et al.

  • 13.
    Björklund, Svante
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Nelander, Anders
    Swedish Def Res Agcy FOI, SWE.
    Pettersson, Mats
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences. Blekinge Inst Technol, Karlskrona, Sweden..
    Fast-Time and Slow-Time Space-Time Adaptive Processing for Bistatic Radar Interference Suppression2015In: 2015 IEEE INTERNATIONAL RADAR CONFERENCE (RADARCON), IEEE Communications Society, 2015, p. 674-678Conference paper (Refereed)
    Abstract [en]

    In bistatic radar with transmitter and receiver geographically separated the interference from ground clutter and the direct path signal transmitter-receiver will be strong and must be suppressed in order to detect the target. We apply FT-STAP (Fast-Time Space Time Adaptive Processing) to the suppression, which is unusual, and compare with conventional ST-STAP (Slow-Time STAP) by simulations in order to see whether FT-STAP is an alternative to ST-STAP. The performance of FT-STAP is much worse than of ST-STAP. We give an explanation for this, which also may be the basis for large improvements of FT-STAP. Moreover, we suggest two new performance measures.

  • 14.
    Björklund, Svante
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Rydell, Joakim
    Totalforsvarets forskningsinstitut, SWE.
    Micro-doppler classification with boosting in perimeter protection2017In: IET Conference Publications, Institution of Engineering and Technology , 2017, no CP728Conference paper (Refereed)
    Abstract [en]

    In security surveillance at the perimeter of critical infrastructure, such as airports and power plants, approaching objects have to be detected and classified. Especially important is to distinguish between humans, animals and vehicles. In this paper, micro-Doppler data (from movement of internal parts of the target) have been collected with a small radar. From time-velocity diagrams of the data, physical features have been extracted and used in a Boosting classifier to distinguish between the classes "human", "animal" and "man-made object". This type of classifier has received much attention lately, but not in radar micro-Doppler classification. The classification result on the current data reaches 90% correct classification with this classifier. The ability to distinguish between humans and animals is good on this data. This classifier type gives insight into the classifier and the utilized features, and is easy to use. A comparison with a SVM (Support Vector Machine) classifier, which is common for micro-Doppler, has also been performed. © 2017 Institution of Engineering and Technology. All rights reserved.

  • 15.
    Bork-Ceszlak, Krzysztof
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Żydanowicz, Tadeusz
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Multisensory Expert-Based Support System for the Firefighter’s Training Performance Evaluation2018Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The primary purpose of this thesis work is to design and implement a system supporting the fire-fighter’straining evaluation. The solution presented in this report comprises a real-time locating system andInertial Measurement Unit that collect the training data and an application built with the Unity3D gameengine used for processing.

    Before the presented application can process any data, a training facility must be recreated, and atrainer or an expert must define training guidelines, such as zones that a trainee must visit, objectshe/she has to see, and the required execution time. After this preparation and completed trainingsession, collected data is processed and the visualization together with evaluation process begins. Theprogram visualizes trainee’s position and his/her field of view and evaluates his performance. For thelatter, it uses the Unity3D collision detection feature. After the evaluation, the trainer can see detailedresults with recorded time stamps, and using them, he/she can fast forward to specific, important points,reducing the time to analyze trainee’s performance throughout the whole training.

    Tests which the authors conducted confirm that the built system meets requirements and is useful forevaluation of the trainee’s performance.

  • 16.
    Branco, Matheus
    et al.
    950 - Centro, Federal Institute of Santa Catarina, BRA.
    Coelho, Leticia
    Federal Institute of Santa Catarina, BRA.
    Schlichting, Louis
    950 - Centro, Federal Institute of Santa Catarina, BRA.
    Gustavsson, Ingvar
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Marques, Maria Arcelina
    Instituto Politcnico do Porto, PRT.
    Alves, Gustavo
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Differentiating simulations and real (remote) experiments2017In: ACM International Conference Proceeding Series, Association for Computing Machinery , 2017Conference paper (Refereed)
    Abstract [en]

    The more recent emergence of remote laboratories caused some discussions about their real educational value, when compared to traditional hands-on and virtual laboratories. This discussion is relevant because remote labs rely on computer-mediated access to real instruments and apparatus, being sometimes difficult to explain the difference between values obtained from real (remote) measurements and values obtained from computer simulations. This paper aims to evidence aspects that differentiate remote and virtual laboratories, by presenting two very simple experiments dealing with the characteristics of real instruments (limited bandwidth) and real circuits (electromagnetic interference). © 2017 Association for Computing Machinery.

  • 17. Chandu, Chiranjeevi
    Region of Interest Aware and Impairment Based Image Quality Assessment2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 18.
    Fabrin, Ana
    et al.
    Universidade Federal de Santa Maria, BRA.
    Molin, Ricardo
    Universidade Federal de Santa Maria, BRA.
    Alves, Dimas Irion
    Universidade Federal do Pampa, BRA.
    Machado, Renato
    Universidade Federal de Santa Maria, BRA.
    Bayer, Fabio
    Universidade Federal de Santa Maria, BRA.
    Pettersson, Mats
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    A CFAR optimization for low frequency UWB SAR change detection algorithms2017In: International Geoscience and Remote Sensing Symposium (IGARSS), Institute of Electrical and Electronics Engineers Inc. , 2017, p. 1071-1074Conference paper (Refereed)
    Abstract [en]

    This paper presents a study on the constant false alarm rate (CFAR) filter design for change detection algorithms (CDA). More specifically, we are interested in CFAR filters used in CDA for low frequency ultra-wideband (UWB) synthetic aperture radar (SAR) systems. The filter design performance was evaluated in terms of false alarm rate (FAR) and probability of detection (PD). For evaluation purposes, we considered a set of SAR images obtained with the CARABAS-II system. The results are compared with the ones presented in [1], where the same CDA was considered, except for the CFAR filter. The results show that relevant FAR performance improvements can be obtained by just modifying the CFAR filter parameters taking into account the image resolution and target characteristics. © 2017 IEEE.

  • 19.
    Fiedler, Markus
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Chapala, Usha Kiran
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Peteti, Sridhar
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Modeling instantaneous quality of experience using machine learning of model trees2019In: 2019 11th International Conference on Quality of Multimedia Experience, QoMEX 2019, Institute of Electrical and Electronics Engineers Inc. , 2019Conference paper (Refereed)
    Abstract [en]

    For service providers and operators, successful root cause analysis is essential for satisfactory service provisioning. However, reasons for sudden trend changes of the instantaneous Quality of Experience (QoE) may not always be immediately visible from underlying service- or network-level monitoring data. Thus, there is the challenge to pinpoint such moments of change in provisioning, and model the impact on instantaneous QoE, as a lead in root cause analysis. This work investigates the potential of Machine Learning (ML) of deriving time-interval-based models for instantaneous QoE ratings, obtained from a set of publicly available rating traces. In particular, the paper demonstrates the capability of the ML algorithm M5P to model trends of instantaneous QoE through model trees, consisting of piecewise linear functions over time. It is shown how and to which extent these functions can be used to estimate moments of change. Furthermore, the model trees support earlier assumptions about exponential shapes of instantaneous QoE over time as reactions to sudden changes of provisioning, such as video freezes. © 2019 IEEE.

  • 20.
    Fiedler, Markus
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Moller, Sebastian
    Technical University of Berlin, DEU.
    Reichl, Peter
    University of Vienna, AUT.
    Xie, Min
    Telenor Research, NOR.
    A Glance at the Dagstuhl Manifesto 'QoE Vadis?'2018In: 2018 10th International Conference on Quality of Multimedia Experience, QoMEX 2018, Institute of Electrical and Electronics Engineers Inc. , 2018, article id 8463374Conference paper (Refereed)
    Abstract [en]

    This short paper presents the recently published Dagstuhl Manifesto 'QoE Vadis?'. The Manifesto is the result of a set of three Dagstuhl Seminars and one Dagstuhl Perspectives Workshop, aimed at shaping understanding, development and application of the Quality of Experience (QoE) notion and concept. Its task is to convey the current status, promising developments and future projections for different stakeholders. The latter are summarised in a set of eleven recommendations to academia, industry and funding organisations. © 2018 IEEE.

  • 21.
    Fiedler, Markus
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Zepernick, Hans-Juergen
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Kelkkanen, Viktor
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Network-induced temporal disturbances in virtual reality applications2019In: 2019 11th International Conference on Quality of Multimedia Experience, QoMEX 2019, Institute of Electrical and Electronics Engineers Inc. , 2019Conference paper (Refereed)
    Abstract [en]

    Virtual Reality (VR) applications put high demands on software and hardware in order to enable an immersive experience for the user and avoid causing simulator sickness. As soon as networks become part of the Motion-To-Photon (MTP) path between rendering and display, there is a risk for extraordinary delays that may impair Quality of Experience (QoE). This short paper provides an overview of latency measurements and models that are applicable to the MTP path, complemented by demands on user and network levels. It specifically reports on freeze duration measurements using a commercial TPCAST wireless VR solution, and identifies a corresponding stochastic model of the freeze length distribution, which may serve as disturbance model for VR QoE studies. © 2019 IEEE.

  • 22.
    Garcia-Loro, F.
    et al.
    Spanish University for Distance Education (UNED), ESP.
    Cristobal, E. S.
    Spanish University for Distance Education (UNED), ESP.
    Diaz, G.
    Spanish University for Distance Education (UNED), ESP.
    MacHo, A.
    Spanish University for Distance Education (UNED), ESP.
    Baizan, P.
    Spanish University for Distance Education (UNED), ESP.
    Blazquez, M.
    Spanish University for Distance Education (UNED), ESP.
    Castro, M.
    Spanish University for Distance Education (UNED), ESP.
    Plaza, P.
    Spanish University for Distance Education (UNED), ESP.
    Orduna, P.
    DeustoTech LabsLand, ESP.
    Auer, M.
    International Association of Online Engineering (IAOE), AUT.
    Kulesza, Wlodek
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Gustavsson, Ingvar
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Nilsson, Kristian
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Fidalgo, A.
    School of Engineering of Polytechnic of Porto (ISEP), PRT.
    Alves, G.
    School of Engineering of Polytechnic of Porto (ISEP), PRT.
    Marques, A.
    School of Engineering of Polytechnic of Porto (ISEP), PRT.
    Hernandez-Jayo, U.
    University of Deusto, Bibao, ESP.
    Garcia-Zubia, J.
    University of Deusto, Bibao, ESP.
    Kreiter, C.
    Carinthia University of Applied Sciences (CUAS), AUT.
    Pester, A.
    Carinthia University of Applied Sciences (CUAS), AUT.
    Garcia-Hernandez, C.
    EVM, Tenerife, ESP.
    Tavio, R.
    EVM, Tenerife, ESP.
    Valtonen, K.
    OMNIA, FIN.
    Lehtikangas, E.
    OMNIA, FIN.
    PILAR: A Federation of VISIR Remote Laboratory Systems for Educational Open Activities2019In: Proceedings of 2018 IEEE International Conference on Teaching, Assessment, and Learning for Engineering, TALE 2018, Institute of Electrical and Electronics Engineers Inc. , 2019, p. 134-141Conference paper (Refereed)
    Abstract [en]

    Social demands have promoted an educational approach based on an 'anywhere and anytime' premise. Remote laboratories have emerged as the answer to the demands of technical educational areas for adapting themselves to this scenario. The result has not only benefit distance learning students but has provided new learning scenarios both for teachers and students as well as allowing a flexible approach to experimental topics. However, as any other solution for providing practical scenarios (hands-on labs, virtual labs or simulators), remote labs face several constraints inherited from the subsystems of its deployment - hardware (real instruments, equipment and scenario) and software (analog/digital conversions, communications, workbenches, etc.}. This paper describes the Erasmus+ project Platform Integration of Laboratories based on the Architecture of visiR (PILAR) which deals with several units of the federation installed in different educational institutions and devoted to analog electronics and electrical circuits. Based on the limitations of remote labs, the need for the federation will be justified and its benefits will be described by taking advantage of its strengths. The challenges that have come up during the different stages and the different approaches to design are also going to be described and analyzed. © 2018 IEEE.

  • 23.
    Gaszczyk, Dariusz
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Wearable Assistant For Monitoring Solitary People2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Master Thesis presents the system consisting of software and components of Arduinoplatform along with modules compatible with it, intended for use indoor. The device fulfils thefollowing requirements which are: to ensure privacy preservation, low energy consumptionand the wireless nature.

    This thesis reports the development of a prototype that would ensure step detection,posture detection, indoor localization, tumble detection and heart rate detection using themicrocontroller, AltIMU-10 v4 module, heart rate monitor, WiFi module and battery. Veryimportant part of the thesis is algorithm, which uses comparison function. Thanks to thewireless nature of a prototype, the system collects data regardless of an environment and sendthem directly to every device supported by Microsoft Windows platform, Linux platform orOS X platform, which are monitored by the supervisor, who takes care of the solitary person.

    The main contributions of the prototype are: indoor localization, identification andclassification of occurring situations and monitoring vital signs of the solitary person.

    To ensure indoor localization the prototype must collect data from accelerometer. Ofcourse data from AltIMU-10 v4 module in basic form are useless for the supervisor, so thealgorithm, using by the prototype, is programmed to processing and filtering it.

    Algorithm is also used to identification and classification occurring situations. Datafrom accelerometer are processed by it and compared with the created pattern.

    Monitoring vital signs of the solitary person are more complicated function, because itrequires not only data from accelerometer, but also from heart rate monitor. This sensor isusing to the analyzing condition of the patient when dangerous situation occurs.

  • 24.
    Ghanian, Nariman
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Farhang Esfahani, William Mohammad
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Hassan, Muhammad Touqeer Ul
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Electrical energy analysis in nine countries of Europe, with focus on wind power and other renewable energy sources2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis has been written for the Bachelor degree in Electrical Engineering held at Blekinge Tekniska Högskola Karlskrona, Sweden. The basis of this thesis is a statistical analysis of the electrical energy situation with emphasis on contribution of wind power and other renewable energy in electricity production in the European area and key countries.

     

    The main parameters, which considered in this thesis are electricity production and consumption, installed capacity trends and also the operation of renewable sources, especially wind power in gross electricity generation. Meanwhile, the whole date and materials are based on real values and investigated from the latest publications of governments and energy agencies of European union and key countries.

     

    The target of European renewable energy is that the member countries must achieve at least 20 percent of final energy consumption from renewable energy by 2020. Germany, United Kingdom, Spain and France and Portugal are members of the highest consumers of electricity in the Europe and still the main source of electrical production in these countries are fossil fuels, the main challenge is that they should start to shutting down the traditional power plant and improve the infrastructure for installing the renewable electrical capacity instead.

     

    According to the statistics, many of the European countries such as United Kingdom, Germany, Spain, Denmark and Sweden have started up to use the renewable energy to produce the electrical energy, but their governments have special keen eye for investment in the wind energy sector. Wind power grew sharply during the past decades in Europe and becoming vital every coming day in comparison to other renewable energy, since the low cost of electricity can be granted through a small investment and relies on the wind blowing compared to the conventional electricity generation sources. The diagrams demonstrate the wind power has a main portion to producing the electrical energy and every year a considerable amount of installed capacity is added to the total electrical grid.

     

    In addition, the expansion of renewable energy  to achieve the high percent of electrical production requires  the improvement of  infrastructure such as ecological research and high coordination between different organizations. Also, the electrical generation cannot be constant, and in winter the overall consumption and demand for electricity increases all over Europe. The exploitation of some renewable sources such as solar and wind power for electrical production can have fluctuation due to the weather condition and wind speed, which can affect the overall generation to the electrical grid.

     

    Therefore, the balancing of several renewable sources in different seasons,  needs the unique power management for reliable electrical production. In this trend, Norway is a successful country in Europe that uses over 90 percent of  renewable sources for total electrical generation. The thesis has covered these challenges and how they are overcoming these issues.

  • 25.
    Gholamhosseinpour, Ali
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Millimeter Wave Radar Interfacing with Android Smartphone2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Radar system development is generally costly, complicated and time consuming. This has kept its presence mostly inside industries and research centers with the necessary equipment to produce and operate such a system. Until recent years, realization of a fully integrated radar system on a chip was not feasible, however this is no longer the case and there are several types of sensors available from different manufacturers.

    Radar sensors offer some advantages that are unmatched by other sensing and imaging technologies such as operation in fog, dust and over long distances. This makes them suitable for use in Navigation, Automation, Robotics, and Security systems applications. The purpose of this thesis is to demonstrate the feasibility of a simplified radar system’s user interface via integration with the most common portable computer, a Smartphone, to make it possible for users with minimal knowledge of radar systems design and operation to use it in different applications.

    Smartphones are very powerful portable computers equipped with a suite of sensors with the potential to be used in a wide variety of applications. It seems logical to take advantage of their computing power and portability. The combination of a radar sensor and a smartphone can act as a demonstrator in an effort to bring radar sensors one step closer to the hands of the developers and consumers.

    In this study the following areas are explored and proper solutions are implemented;

    • Design of a control board with capability to drive a radar sensor, capture the signal and transfer it to a secondary device (PC or Smartphone) both wired and wirelessly e.g. Bluetooth.
    • A firmware that is capable of driving the control board and can receive, interpret and execute messages from a PC and or a Smartphone
    • A cross compatible master software that can run on Linux, Windows, Mac and Android OSs and is capable of communication with the firmware/control board
    • Proper analysis methods for signal capture and process purposes
    • Automation of some parameter adjustment for different modes of operation of the Radar System in order to make the user interface as simple as possible
    • A user friendly user-interface and API that can run on both PC and Smartphone 
  • 26.
    Gholami, Omid
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science and Engineering.
    Sotskov, Yuri
    United Institute Of Informatics Problems, BLR.
    Werner, Frank
    Otto-von-Guericke-Universität, DEU.
    A Genetic algorithms for hybrid job-shop problems with minimizing the makespan and mean flow time2018In: Journal of Advanced Manufacturing Systems, ISSN 0219-6867, Vol. 17, no 4, p. 461-486Article in journal (Refereed)
    Abstract [en]

    We address a generalization of the classical job-shop problem which is called a hybrid job-shop problem. The criteria under consideration are the minimization of the makespan and mean ow time. In the hybrid job-shop, machines of type k are available for processing the specific subset O^k of the given operations. Each set O^k maybe partitioned into subsets for their processing on the machines of type k. Solving the hybrid job-shopproblem implies the solution of two subproblems: an assignment of all operations fromthe set O^k to the machines of type k and nding optimal sequences of the operationsfor their processing on each machine. In this paper, a genetic algorithm is developedto solve these two subproblems simultaneously. For solving the subproblems, a specialchromosome is used in the genetic algorithm based on a mixed graph model. We com-pare our genetic algorithms with a branch and bound algorithms and three other recentheuristic algorithms from the literature. Computational results for benchmark instanceswith 10 jobs and up to 50 machines show that the proposed genetic algorithm is ratherecient for both criteria. Compared with the other heuristics, the new algorithm givesmost often an optimal solution and the average percentage deviation from the optimalfunction value is about 4 %.

  • 27.
    GOGINENI, SRI LOHITH
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    DEVELOPMENT OF AN ROI AWARE FULL-REFERENCE OBJECTIVE PERCEPTUAL QUALITY METRIC ON IMAGES OVER FADING CHANNEL2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In spite of technological advances in wireless systems, transmitted data suffers from impairments through both lossy source coding and transmission overerror prone channels. Due to these errors, the quality of multimedia content is degraded. The major challenge for service providers in this scenario is to measure the perceptual impact of distortions to provide certain Quality of Experience(QoE) to the end user. The general tendency of the Human Visual System (HVS) suggests that the artifacts in the Region-of-Interest (ROI) are perceived to be more annoying compared to the artifacts in Background (BG). With this assumption, the thesis aims to measure the quality of image over ROI and BG independently. Visual Information Fidelity (VIF), a full-reference image quality assessment is chosen for this purpose. Finally, the metric measured over ROI and BG are pooled to get a ROI aware metric. The ROI aware metric is used to predict the Mean Opinion Score (MOS) of an image. In this study, an ROI aware quality metric is used to measure the quality of a set of distorted images generated using a wireless channel. Eventually, MOS of the distorted images is estimated. Lastly, the predicted MOS is validated with the MOS obtained from subjective tests. Testing the proposed image quality assessment approach shows an improved prediction performance of ROI aware quality metric over traditional image quality metrics. It is also observed that the above approach provides a consistent improvement over a wide variety of distortions. After extensive research, the obtained results suggest that the impairments in the ROI are perceived to be more annoying than that of the BG.

  • 28.
    Gustavsson, Ingvar
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Nilsson, Kristian
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Zackrisson, Johan
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Alves, G.R.
    Fidalgo, A.V.
    Claesson, L.
    Zubia, J.G.
    Jayo, U.H.
    Castro, M.
    Diaz Orueta, G.
    Loro, F.G.
    Lab sessions in VISIR laboratories2016In: Proceedings of 2016 13th International Conference on Remote Engineering and Virtual Instrumentation, REV 2016, IEEE Press, 2016, p. 350-352Conference paper (Refereed)
    Abstract [en]

    Experimental activities with real components are an essential part of all courses including or devoted to electrical and electronic circuits theory and practice. The knowledge triangle composed of hand-written exercises, simulations and traditional lab experiments has been enriched with the possibility for students to conduct real experiments over the Internet, using remote labs. This tutorial is devoted to one such remote lab named Virtual Instrument Systems in Reality (VISIR). The Global Online Laboratory Consortium (GOLC) elected VISIR as the best remote controlled laboratory in the world, at the first time this distinction was awarded. At the end of this tutorial, attendees are expected to know what is VISIR, what can (not) be done with it, who is currently using it, and how can one integrate it in a given course curriculum.

  • 29. Hellisten, Hans
    et al.
    Machado, Renato
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Pettersson, Mats I.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Vu, Viet Thuy
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Dammert, Patrik
    EXPERIMENTAL RESULTS ON CHANGE DETECTION BASED ON BAYES PROBABILITY THEOREM2015In: 2015 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS), IEEE Communications Society, 2015, p. 318-321Conference paper (Refereed)
    Abstract [en]

    In this paper we propose a new change detection (CD) algorithm based on the Bayes theorem and probability assignments. Differently from any kind of likelihood ratio test (LRT) algorithms, the proposed algorithm does not present target alarms, but the probability of certain image position is a target position. In other words, the proposed method leads to quantitative estimates on the probability of a target at any pixel, whereas LRT algorithms can only be used as a figure of merit for any pixel to contain a target.

  • 30.
    Horvat, Marko
    et al.
    University of Zagreb, SRB.
    Dobrinic, Marko
    University of Zagreb, SRB.
    Novosel, Matej
    University of Zagreb, SRB.
    Jerčić, Petar
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Assessing emotional responses induced in virtual reality using a consumer EEG headset: A preliminary report2018In: 2018 41st International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2018 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2018, p. 1006-1010Conference paper (Refereed)
    Abstract [en]

    We report on a pilot study involving emotion elicitation in virtual reality (VR) and assessment of emotional responses with a consumer-grade EEG device. The stimulation used HTC Vive VR system showing pictures from NAPS database within a specifically designed virtual environment. The stimulation consisted of two distinct sequences with 10 pictures of happiness and 10 pictures of fear. Each picture was contained in a separate virtual room that the participants traveled through along a preset path. The estimation employed EMOTIV EPOC+ 14-channel EEG headset and a custom-developed application. The software wirelessly received EEG signals from alpha, beta low, beta high, gamma and theta bands, time-stamped them and dynamically stored in a relational database for subsequent analysis. Our preliminary results show that statistically significant correlations between valence and arousal ratings of pictures and EEG bands are present but highly personalized. Simultaneous correct placement of VR and EEG headsets is demanding and precise localization of electrodes is difficult. In fact, if emotion estimation is not strictly necessary we recommend using devices with fewer electrodes. Nevertheless, we found the EEG to be effective. By acknowledging its limitations, and using the headset in the correct context, experiments involving emotions may be significantly amended. © 2018 Croatian Society MIPRO.

  • 31.
    Hu, Yan
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Cloud Computing for Achieving Interoperability in Home-based Healthcare2017Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The care of chronic disease has become the main challenge for healthcare institutions around the world. As the incidence and prevalence of chronic diseases continue to increase, it is a big challenge for traditional hospital-based healthcare to meet requirements of patients. To meet the growing needs of patients, moving the front desk of healthcare from hospital to home is essential. Home-based healthcare for chronic disease involves many different organizations and healthcare providers. Therefore, there are interoperability problems for cooperation among the various organizations and healthcare providers to provide efficient and seamless home-based healthcare. 

    This thesis aims to point out an appropriate technical solution to interoperability problems in home-based healthcare. There are different levels of interoperability, such as pragmatic, semantic and syntactic. We explored alternative solutions specifically for syntactic interoperability. We started to identify the interoperability problems among different healthcare centers by interviews and online surveys. Based on this empirical study, we mainly used two current techniques, namely peer-to-peer (P2P) networks and cloud computing, to design prototypes for sharing healthcare data. Comparing these two techniques, we found the cloud-based solution figured out most of the problems encountered in healthcare interoperability. 

    To identify state of the art, and pinpoint the challenges and possible future directions for applying a cloud-based solution, a systematic literature review was carried out on cloud-based healthcare solutions. Based on the literature reviewed, we suggest a hybrid cloud model, with access controls and techniques for securing data, could be an acceptable solution for home-based healthcare in the future. This cloud model would work as a community for both healthcare providers and recipients, as well as other stakeholders, such as family members and other patients with similar symptoms. Then we conducted a questionnaire study with healthcare recipients and interviewed healthcare providers to gather the requirements for the design of the community. Based on the concept of ‘community’ from the activity theory model, we designed a prototype to demonstrate our proposed solution.   

    Finally, we proposed the conceptual hybrid cloud model. In our hybrid cloud model, hospitals and primary healthcare centers could continue using their own databases as private clouds. For home-based healthcare data, we argued, the best approach is to store and process the data in public clouds. Healthcare recipients, as the owners of their health data in public clouds, should then decide who can access their data and the conditions for sharing. To evaluate this model, we conducted a two-step case study of diabetes healthcare in Blekinge, Sweden. We found that our improved hybrid cloud model will be feasible in the future for home-based healthcare, and it will benefit both healthcare providers and recipients.

    To apply this model in practice, we suggest that a professional IT healthcare education team should be created to support both healthcare providers and recipients.

  • 32.
    Hu, Yan
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Cloud Computing for Interoperability in Home-Based Healthcare2014Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The care of chronic disease has become a main challenge for healthcare institutions around the world. As the incidence and prevalence of chronic diseases continue to increase, traditional hospital-based healthcare is less able to meet the needs of every patient. Treating chronic disease heavily depends on the patient’s daily behaviors, so patient-centered healthcare is encouraged. To improve patients’ quality of life, moving the base of healthcare from hospital to home is imperative. Home-based chronic disease care involves many different healthcare organizations and healthcare providers. Therefore, interoperability is a key approach to provide efficient and convenient home-based healthcare services. This thesis aims to reveal the interoperability issues in the current healthcare system and to point out an appropriate technical solution to overcome them. We start with collecting perspectives from both healthcare providers and healthcare recipients through interviews and online surveys to understand the situations and problems they face. In our research study, we mainly use two current techniques―peer-to-peer (P2P) networks and cloud computing―to design prototypes for sharing healthcare data, developing both a P2P-based solution and a cloud-based solution. Comparing these two techniques, we found the cloud-based solution covered most of the deficiencies in healthcare interoperability. Although there are different types of interoperability, such as pragmatic, semantic and syntactic, we explored alternative solutions specifically for syntactic interoperability. To identify the state of the art and pinpoint the challenges and possible future directions for applying a cloud-based solution, we reviewed the literature on cloud-based eHealth solutions. We suggest that a hybrid cloud model, which contains access controls and techniques for securing data, would be a feasible solution for developing a citizen-centered, home-based healthcare system. Patients’ healthcare records in hospitals and other healthcare centers could be kept in private clouds, while patients’ daily self-management data could be published in a trusted public cloud. Patients, as the owners of their health data, should then decide who can access their data and the conditions for sharing. Finally, we propose an online virtual community for home-based chronic disease healthcare―a cloud-based, home healthcare platform. The requirements of the platform were mainly determined from the responses to an online questionnaire delivered to a target group of people. This platform integrates healthcare providers and recipients within the same platform. Through this shared platform, interoperability among different healthcare providers, as well as with healthcare recipients’ self-management regimens, could be achieved.

  • 33.
    Hu, Yan
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Peng, Cong
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Bai, Guohua
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Sharing Health Data Through Hybrid Cloud For Self-Management2015In: 2015 IEEE International Conference on Multimedia & Expo Workshops (ICMEW), IEEE, 2015Conference paper (Refereed)
    Abstract [en]

    Nowadays, patient self-management is encouraged in home-based healthcare, especially for chronic disease care. Sharing health information could improve the quality of patient self-management. In this paper, we introduce cloud computing as a potential technology to provide a more sustainable long-term solution compared with other technologies. A hybrid cloud is identified as a suitable way to enable patients to share health information for promoting the treatment of chronic diseases. And then a prototype on the case of type 2 diabetes is implemented to prove the feasibility of the proposed solution.

  • 34.
    Ickin, Selim
    et al.
    Blekinge Institute of Technology.
    Fiedler, Markus
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Quality of Experience on Smartphones: Network, Application, and Energy Perspectives2016Conference paper (Refereed)
    Abstract [en]

    For service and mobile operators, it is importantto monitor and keep high user engagement levels. Qualityof Experience (QoE) on video streaming applications is animportant engagement measure for video consumer customers.In this paper, video QoE (with the focus on stalling events)is studied from network, application, and energy perspectiveswith various instrumentations on a smartphone. This enablesthe understanding of inter-relation between the perspectives andalso how they influence the video QoE. Results show that packetdelay variation and the maximal burst size in the network level;inter-picture time (picture delay) in the application layer; andalso fluctuations in the energy consumptions are strong indicatorsfor QoE. We show, via extensive QoE and energy measurementson smartphones that, based on the choice of streaming protocol,energy consumption can be reduced or increased in the case ofstalling events during a video stream.

  • 35.
    Jamil, Momin
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Zepernick, Hans-Juergen
    Blekinge Institute of Technology, Faculty of Computing, Department of Creative Technologies.
    Yang, Xinshe
    Middlesex University, GBR.
    Sequence optimization for integrated radar and communication systems using meta-heuristic multiobjective methods2017In: 2017 IEEE Radar Conference, RadarConf 2017, Institute of Electrical and Electronics Engineers Inc. , 2017, p. 0502-0507Conference paper (Refereed)
    Abstract [en]

    In real-world engineering problems, several conflicting objective functions have often to be optimized simultaneously. Typically, the objective functions of these problems are too complex to solve using derivative-based optimization methods. Integration of navigation and radar functionality with communication applications is such a problem. Designing sequences for these systems is a difficult task. This task is further complicated by the following factors: (i) conflicting requirements on autocorrelation and crosscorrelation characteristics; (ii) the associated cost functions might be irregular and may have several local minima. Traditional or gradient based optimization methods may face challenges or are unsuitable to solve such a complex problem. In this paper, we pose simultaneous optimization of autocorrelation and crosscorrelation characteristics of Oppermann sequences as a multiobjective problem. We compare the performance of prominent state-of-the-art multiobjective evolutionary meta-heuristic algorithms to design Oppermann sequences for integrated radar and communication systems. © 2017 IEEE.

  • 36.
    Kodide, Alekhya
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Performance Analysis of a Cooperative Communication Network Over κ - μ Shadowed Fading for Different Relaying Protocols2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    With the fast development of today’s multimedia services, engineers face a huge hurdle that is, the overwhelming need of highly reliable communication over long distances. Cooperative communication is a novel concept which tackles this problem effectively. The direct link is assisted by nodes called relays, which also reduce shadowing and pathloss effects in wireless networks. An added advantage of such a cooperative communication network is that when combined with multiple-input multiple-output (MIMO) antenna systems and cognitive radio networks (CRN), the system performance in terms of spectral efficiency and reliability, can be extremely enhanced without any extra power and spectrum.The concept of cooperative communications in MIMO and CRN systems has gained immense interest in the literature. Most of the research works have assumed Rayleigh fading conditions. In this thesis, the performance of cooperative communications with practical constraints of shadowing is studied. Analytical expressions for the outage probability of cooperative networks under different relaying protocols with selection combining are presented under the assumption of κ − µ shadowing fading. Specifically, the relaying protocols that are investigated are incremental relaying, opportunistic relaying, adaptive amplify-and-forward and decode-and-forward. Furthermore, this system model is simulated and the simulation results are compared with the analytical results. Mathematica, a technical computing tool, is used for numerical estimations using stochastic processes and probability theory. Simulation is done in MATLAB.In this thesis, along with the analytical framework for evaluating outage probability for the system is presented. Simulations are performed for various fading parameters and the results closely match with analytical results which validate the derivations.

  • 37. Konopka, Piotr
    et al.
    Żmuda, Maciej
    Extending the capabilities of existing Remote Laboratory for Active Noise Control2017Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The aim of the thesis is to upgrade an existing Remote Laboratory for Active Noise Control (ANC) and acoustics experiments providing users with a more authentic real life experience. This is done by designing a solution that allows remote position control of microphones inside a ventilation duct for ANC experiments. The suggested features to be implemented substantially improve the flexibility of the existing remote laboratory, based on the Virtual Instrument System in Reality (VISIR) platform, as well as providing more control over the system as a whole.

    The work in the project may be divided into the following steps: theoretical design of mechanical and electrical parts of the system along with control algorithms which include a study of similar solutions and related work, implementation of designed system, subsequent testing of the system, connecting the implemented system to the equipment for remote communication and adding the appropriate features to the remote control interface.

  • 38.
    Larsson, Tobias
    et al.
    Luleå University of Technology.
    Larsson, Madelene
    NeedInn - behovsdriven produktutveckling inom E-hälsa2007Report (Refereed)
    Abstract [en]

    Denna rapport beskriver genomförandet och resultatet av EU-projektet NeedInn. NeedInn står för Needfinding och Innovation och det är inom dessa områden som projektet har tagit fram NeedInn-processen, ett arbetssätt med tillhörande metoder för hur du genomför behovsdriven produktutveckling inom e-hälsa. I rapporten framgår även problematiken som kan uppstå när behoven bakom olika lösningar inte tillgodoses på ett för användaren fungerande sätt och att det behövs en process för att fånga upp dessa behov redan från början så att fokus blir på rätt lösning. Rapporten består av Inledning, och sedan beskrivning av projektets Syfte och Mål. Därefter följer det ett kapitel om hur projektets organisation har varit under projektets gång. Där framgår det även vilka aktiviteter som projektet haft som utgångspunkt samt vilken tidsplan vi arbetat efter. Under kapitlet Fallstudierna redogörs det för samarbetet med de olika vårdaktörerna och varför det är viktigt med förankring innan ett sådant här projekt kan ta fart och få genomslagskraft. Det framgår även hur vi har gått tillväga för att sprida kunskap om projektet och hur vi arbetat med studentprojektet inom ramen för SIRIUS som är en avslutningskurs på LTU inom Kreativ produktutveckling. Vidare har vi under rubriken Samverkan samlat allt material om hur vi samarbetat med andra projekt, forskare, företag och relevanta verksamheter. Där framgår det även vilka konferenser och utbildningar vi deltagit på och hållit i och vad detta har gett projektet. I kapitlet Projektresultat redogör denna rapport för de olika prototypprojekt som genomförts i projektet och där framgår det även vilket tillvägagångssätt och val av metoder som vi använt oss av. Förutom prototypprojekten så har vi under detta kapitel även redogjort för de olika publikationer som är kopplade till projektet och där finns forskningsartiklar, bokkapitel och examensrapport sammanfattade. Arbetet med NeedInn-processen och dess tillhörande IT-stöd är något som också framgår under denna del. Slutligen avrundas denna rapport med en avslutande Diskussion där våra egna reflektioner och tankar kring projektet och dess resultat finns dokumenterade. <br/>

  • 39. Lima, N.
    et al.
    Alves, G.
    Viegas, C.
    Gustavsson, Ingvar
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Combined efforts to develop students experimental competences2015In: exp.at 2015 - 3rd Experiment International Conference: Online Experimentation, IEEE Press, 2015, p. 243-248Conference paper (Refereed)
    Abstract [en]

    Students experimental competences are of most importance in engineering courses. However in post-Bologna courses, the number of contact hours and the actual extent of hands-on lab work were substantially reduced. Online resources usage (simulators and remote labs) has been growing up in the last decades, as more complex and versatile tools are being developed. Unfortunately, several of these usages reported in literature do not show the didactical backing that support these implementations. This work is a step forward, explaining how a teacher implemented a combination of online resources in order to develop experimental competences. The results show significant correlations between students’ usage of these resources and their calculus competences and final achievements.

  • 40.
    Lima, Natercia
    et al.
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Viegas, Maria Clara
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Zannin, Marcelo
    Universidade Federal de Santa Catarina, BRA.
    Marques, Arcelina
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Alves, Gustavo
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Felgueiras, Carlos
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Costa, Ricardo
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Fidalgo, André
    Research Centre in Industrial Technology and Engineering (CIETI), PRT.
    Marchisio, Susana
    Universidad Nacional de Rosario, ARG.
    Lerro, Federico
    Universidad Nacional de Rosario, ARG .
    Merendino, Claudio
    Universidad Nacional de Rosario, ARG.
    Da Silva, Juarez
    Universidade Federal de Santa Catarina, BRA.
    Pozzo, Maria Isabel
    Consejo Nacional de Investigaciones Cientificas y Tecnicas, ARG.
    Dobboletta, Elsa
    Consejo Nacional de Investigaciones Cientificas y Tecnicas, ARG.
    Gustavsson, Ingvar
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Nilsson, Kristian
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Garcia-Peñalvo, Francisco
    Universidad de Salamanca, ESP.
    Do students really understand the difference between simulation and remote labs?2017In: ACM International Conference Proceeding Series, Association for Computing Machinery , 2017Conference paper (Refereed)
    Abstract [en]

    Laboratory experiments play a crucial role in engineering education as they strongly contribute to the development of important skills for the professional practice. This paper addresses a students' understanding gap between simulations and remote labs. These two resources (and namely the remote laboratory VISIR - Virtual Instrument Systems in Reality) have been commonly used on several didactical implementations, along with other didactical resources in different Engineering degrees at the Federal University of Santa Catarina and Polytechnic of Porto School of Engineering. This work, developed in the scope of the VISIR+ Project, intends to evaluate students' perceptions considering simulation and remote lab results. Quantitative and qualitative data were analyzed to better understand how deeply students realize the differences between these resources and their type of data. Preliminary results indicate that a considerable number of student's don't have a clear idea of these differences, even though sometimes they know their definition. Furthermore, this gap does not seem to differ much with the context (country, course, academic year, course content), students' final grades, teacher approach or implemented tasks. © 2017 Association for Computing Machinery.

  • 41.
    Lima, Natercia
    et al.
    Res Ctr Ind Technol & Engn CIETI, PRT.
    Zannin, Marcelo
    Fed Univ Santa Catarina UFSC, BRA.
    Viegas, Clara
    Res Ctr Ind Technol & Engn CIETI, PRT.
    Marques, Arcelina
    Res Ctr Ind Technol & Engn CIETI, PRT.
    Alves, Gustavo
    Res Ctr Ind Technol & Engn CIETI, PRT.
    Felgueiras, Manuel C.
    Res Ctr Ind Technol & Engn CIETI, PRT.
    Costa, Ricardo
    Res Ctr Ind Technol & Engn CIETI, PRT.
    Fidalgo, Andre
    Res Ctr Ind Technol & Engn CIETI, PRT.
    da Silva, Juarez B.
    Fed Univ Santa Catarina UFSC, BRA.
    Pozzo, Maria I.
    Consejo Nacl Invest Cient & Tecn, ARG.
    Dobboletta, Elsa
    Consejo Nacl Invest Cient & Tecn, ARG.
    Gustavsson, Ingvar
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Garcia-Penalvo, Francisco
    Univ Salamanca, ESP.
    The VISIR plus Project: Helping Contextualize Math in an Engineering Course2017In: PROCEEDINGS OF 2017 4TH EXPERIMENT@INTERNATIONAL CONFERENCE (EXP.AT'17), IEEE , 2017, p. 7-12Conference paper (Refereed)
    Abstract [en]

    The long-term goal of engineering education is to prepare students to work as engineers. Being a practical profession, laboratories play a crucial role in illustrating concepts and principles as well as improving technical skills. In the last decades the use of online resources (simulators and remote labs) has been growing, either as a complementary and/or as an alternative way of developing experimental competences. In the scope of the VISIR+ Project, this work presents the first results of a didactical implementation using simultaneously the remote laboratory VISIR (Virtual Instrument Systems in Reality), simulation and calculus in a Math Course at the Federal University of Santa Catarina (UFSC). The preliminary results indicate that the use of several resources increases students' performance, boosting their learning and competence development.

  • 42.
    Machado, Renato
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Pettersson, Mats I.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Vu, Viet Thuy
    Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
    Dammert, Patrik
    Hellsten, Hans
    EMPIRICAL-STATISTICAL ANALYSIS OF AMPLITUDE SAR IMAGES FOR CHANGE DETECTION ALGORITHMS2015In: 2015 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS), 2015, p. 365-368Conference paper (Refereed)
    Abstract [en]

    This paper presents an analysis of pre-filtered clutter VHF SAR images. The image data are reorganized into sub-vectors based on the observation of the image-pair magnitude samples. Based on this approach, we present a statistical description of the SAR clutter obtained by the subtraction between two real SAR images. The statistical analysis based on bivariate distribution data organized into different intervals of magnitude can be an important tool to further understand the properties of the backscattered signal, which can be a valuable premise for change detection processing.

  • 43.
    Marakani, Sumeesha
    Blekinge Institute of Technology, Faculty of Computing, Department of Computer Science.
    Employee Matching Using Machine Learning Methods2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: Expertise retrieval is an information retrieval technique that focuses on techniques to identify the most suitable ’expert’ for a task from a list of individuals.

    Objectives: This master thesis is a collaboration with Volvo Cars to attempt applying this concept and match employees based on information that was extracted from an internal tool of the company. In this tool, the employees describe themselves in free-flowing text. This text is extracted from the tool and analyzed using Natural Language Processing (NLP) techniques.

    Methods: Through the course of this project, various techniques are employed and experimented with to study, analyze and understand the unlabelled textual data using NLP techniques. Through the course of the project, we try to match individuals based on information extracted from these techniques using Unsupervised MachineLearning methods (K-means clustering).Results. The results obtained from applying the various NLP techniques are explained along with the algorithms that are implemented. Inferences deduced about the properties of the data and methodologies are discussed.

    Conclusions: The results obtained from this project have shown that it is possible to extract patterns among people based on free-text data written about them. The future aim is to incorporate the semantic relationship between the words to be able to identify people who are similar and dissimilar based on the data they share about themselves.

  • 44.
    Min, Yuhao
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Cai, Shengcong
    Blekinge Institute of Technology, Faculty of Computing, Department of Software Engineering.
    Comparing Different Approaches of GUI Testing for Mobile Applications on Android Platform2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background. With the development and popularization of mobile Internet, smartphones are becoming more and more popular. Android is one of the most popular platforms of smartphones.  And application is one of the most important part of a smartphone. There are a lot of money and human resources spent on Android application development every year. And quiet a big part of them goes to quality assurance of applications. Graphic user interface (GUI) testing is one important part of its quality assurance. Android phones use touch screen as the major I/O method. Therefore, GUI testing on android platform shall be different to conventional software applications that are designed to run on desktop environment.

    Objectives. The aim of this research is to assess the performance of two GUI testing approaches (2nd vs 3rd generation) of automated UI testing in terms of testing Android applications. By assessing these approaches, we could hopefully get insights of their advantages and limitations for using them in the context of Android development. And this aim can be divided into three objectives, to compare the time spent on implementing test cases of each tool, to compare the time costed when executing test cases of each tool, to compare the number of defects found by each tool.

    Methods. The research methodology we chose is controlled experiment. We have chosen UI Automator and Appium to represent 2nd generation GUI testing approach, EyeAutomate and SikuliX to represent 3rd generation GUI testing approach. We used each tool to implement and execute 120 test cases to compare them on the time spent on implementing test cases of each tool, the time costed when executing test cases of each tool, the number of real defects found by each tool, and the number of false positives found by each tool.

    Results. Tools using 3rd generation GUI testing approach take less time to implement test cases than tools using 2nd generation GUI testing approach. And there is no specific pattern when comparing tools using 2nd and 3rd generation GUI testing approaches in terms of time cost on executing test cases. It is different between different test cases. Besides false positive alerts appear at a much higher frequency in tools using 3rd generation GUI testing approach than tools using 2nd generation GUI testing approach. While, real defects found by each tool are the same.

    Conclusions. 3rd generation GUI testing approach is more efficient in terms of implementing test cases than 2nd generation GUI testing approach. But 3rd generation GUI testing approach finds much more false positives than 2nd generation approach. To decide if a defect alert is false positive or not requires human effort. In a long term, it may accumulate huge lost on human efforts. Therefore, to maintain test cases, 3rd generation approach consumes lots of human efforts.

  • 45.
    Minhas, Tahir Nawaz
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Nawaz, Omer
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Fiedler, Markus
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    Khatibi, Siamak
    Blekinge Institute of Technology, Faculty of Computing, Department of Technology and Aesthetics.
    The Effects of Additional Factors on Subjective Quality Assessments2019In: 2nd International Conference on Advancements in Computational Sciences, ICACS 2019, Institute of Electrical and Electronics Engineers Inc. , 2019, p. 120-124, article id 8689138Conference paper (Refereed)
    Abstract [en]

    In Quality of Experience, the users' degrees of delight or annoyance are quantized by direct human interaction via subjective quality assessments. There are many factors that may influence the users' responses, and standards have been laid down to strictly control the monitoring conditions. In this paper, we analyze limitations of Mean Opinion Score (MOS) assessment to portray the influence of additional factors on user behavior while assessing multimedia content. We show that the frequency of watching online video content as well as the user delight with the content play a significant role in her final feedback. Our study emphasizes the need to use additional metrics along with MOS for content ratings to obtain a more accurate measure of the user experience. © 2019 The University of Lahore.

  • 46.
    Mohanasundaram, Raj Kumar
    et al.
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Natarajan, Venkata Krishnan
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Wireless bio sensing with mobile monitoring system2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Personal tele-health solutions are believed to be important future instruments to tackle the global challenges of aging population and increasing costs for health care. Tiny and wireless connected medical sensors such as those embedded in clothes or onto the body become an integrated part of the lifestyle and will allow hospitals to remotely diagnose patients from their home.

    In this thesis, a wireless bio-sensing system is proposed to provide a home-based healthcare service for continuous monitoring. This idea is based on Internet of things (IoT), where there is always someone who has information (server) and someone who needs that information (client).

    This thesis work involves the designing of Bluetooth Low Energy (BLE) profile for the designed BLE capable ECG health sensor. With that BLE profile, a wireless communication and data transfer are possible. An iPhone Operating System (iOS) application is developed to connect to this health sensor and to get the data from the sensor. In addition to displaying the ECG waveform from the sensor, the smart phone’s GPS and accelerometer sensors are used to give location details, in detecting a patient’s fall and also alarming if the fall looks unusual. There is a facility to store these data for any given time for later use to perform further analysis.

  • 47.
    Nawaz, Omer
    et al.
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems. Blekinge Inst Technol, Dept Commun Syst, Karlskrona, Sweden..
    Minhas, Tahir Nawaz
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems. Blekinge Inst Technol, Dept Commun Syst, Karlskrona, Sweden..
    Fiedler, Markus
    Blekinge Institute of Technology, Faculty of Computing, Department of Communication Systems. Blekinge Institute of Technology, School of Engineering, Department of Telecommunication Systems. Blekinge Institute of Technology, School of Computing. Blekinge Inst Technol, Dept Commun Syst, Karlskrona, Sweden..
    Optimal MTU for Realtime Video Broadcast with Packet Loss - A QoE Perspective2014In: 2014 9TH INTERNATIONAL CONFERENCE FOR INTERNET TECHNOLOGY AND SECURED TRANSACTIONS (ICITST), IEEE , 2014, p. 396-401Conference paper (Refereed)
    Abstract [en]

    Multimedia applications have become the prime source of Internet traffic in recent years due to high bandwidth offered by almost all access mechanisms. This highlights the need of intense research efforts to improve the already demanding user perception levels for high-performance video delivery networks. Quality of Experience (QoE) based metrics are often used to quantify user satisfaction levels regarding an application or service. In this paper, we have analyzed the impact of variable frame sizes at link layer with different packet loss scenarios to evaluate the performance degradation of H.264 based live video streams from the end user perspective using subjective tests. We have focused on both subjective and objective quantitative measures to analyze the myth that smaller packets provide better quality in error-prone networks. We found that this assumption may not be true for some cases with a considerable packet loss ratio. Moreover, we observed that full-reference video assessment software like PEVQ predicts QoE to an acceptable extent, which allows cutting cost and effort coming with subjective evaluations. Keywords-Quality of Experience, Multimedia communication, Streaming media

  • 48. Ngajieh, Fredric Ngende
    et al.
    Weiber, Chioma Ezike
    Arduino Dynamic Wireless Sensor Network System2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 49.
    Ni, Houbo
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing. Shanghai Second Polytechnic University.
    Smart coffee maker2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Nowadays, more and more people drink coffee not only from Starbucks or other shops, but also brew coffee from coffee maker which with proper sizes which they can be put in the resting room of companies or homes.

    The products of coffee maker polarize in the market. Some of them have powerful functions and nice tastes with high prices. The others are simple, cheap but losing enjoyment of drinking coffee and people need to keep an eye on status of coffee maker. Most of people prefer the cheaper type. But more functions will take more convenience.

    Actually users can have them both. In this thesis, I design some functions based on the cheap type of coffee maker which will make drinking coffee more convenient and enjoyable.

    I use Arduino Uno as my control system, cooperating with sensors and special circuits. My system monitor working time of coffee maker, temperature of coffee and water level of both coffee pot and tank in the coffee maker. Then users can receive these values from their cell phone and doing remote control. Meanwhile considering about prices, I choose the most suitable sensors for measurement. I also do some jobs for saving energy and safe. The system locks or turns off the switch automatically for them. At last, all the sensors, wires and control chip are put in good positions in the maker. 

  • 50.
    Noursobhi, Soroush
    Blekinge Institute of Technology, Faculty of Engineering, Department of Applied Signal Processing.
    Puzzle Up: Android Jigsaw Puzzle Game2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Development of a jigsaw based puzzle game for Android called PuzzleUp. The idea is that user takes a picture in real time and breaks it into jigsaw pieces that has to be put together. It also features a multiplayer mode on local area network (LAN).The main programming language used is Java and the main development environment is Android Studio (Based on JetBrains Idea) and AllJoyn has been used for inter-device communication to ensure maximum compatibility.

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