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  • 4901.
    Abed, Samah
    et al.
    University of Borås, Faculty of Textiles, Engineering and Business.
    Al-Kaisee, Farah
    University of Borås, Faculty of Textiles, Engineering and Business.
    Metallutvinning med fokus på zinkfrån avfallsflygaska med hjälp avsura processvatten2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Sweden produces large amount of fly ash from waste combustion annually. Combustion the

    waste generates two types of ashes, bottom ash/slag, and fly ash. Bottom ash is considered to

    be more environmentally friendly and has a wide area of application such as road

    constructions on landfills. While the fly ash has high level of heavy metals and for instance

    dioxines which are harmful for the environment. This type of ash are deposited in a landfill

    and gets classified as a hazardous waste which is expensive given that the deposit fee is high.

    The fact that fly ash contains valuable metals as zinc, methods of recovering it are being

    developed such as acid leaching. This is a promising method as the leachate used are acid

    process water making the usage of the chemicals substantially lower which makes it

    financially viable.

    Waste incinerators in Sweden produce approximately 200 000 tons of fly ash annually and the

    majority of it is transfered to Norway to get treated and put on a landfill. Some waste

    management companies, e.g. Renova, are using another method called “the Bamberg method”

    where fly ash is mixed with sludge to form a cake and put in the company’s own landfill.

    The projects goal is to leach the fly ash by using acidic process water to obtain the metallic

    substance particularly zinc making it easier and cheaper to landfill the ash and also to

    optimize this method to get the most zinc out of the ash using minimum amount of the acidic

    process water (5% HCI).

    The laboratory work took place in the University of Borås. Fly ash and the acid process water

    which were used under the laboratory work was obtained from RenovaAB.

    The results shows that leaching the fly ash with acidic process water gave different release of

    zinc but was 88% at most. The variation in the results depends on a few factors such as

    amount of acidic process water, pH, time, blending time and the ashes content.

    This project took environment and access to acidic water in consideration, which optimized

    the method of using less amount of acid process water to get the most zinc as possible.

    The results shows that leaching fly ash with acid process water is cost efficient and easy way

    to recover zinc, which satisfy the goals of the project.

  • 4902.
    Abed, Sarah
    Stockholm University, Faculty of Humanities, Department of English.
    Teachers’ perceptions of peer review on written assignment in English: A qualitative study of six teachers at two junior high schools in Stockholm2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Peer review is aan interestingwell-researched  topic, with much research focusing on the students’' own perceptions of peer review/assessment as well as benefits and challenges with the method. However, little research has been conducted on teachers’ perceptions of students’ peer review of written assignments in English, with a general focus on junior high school level in a Swedish school. Thus, this study was aimed at examining six English teachers’´ perceptions and their usage of peer review of written assignments in English at two junior high schools in Stockholm. A qualitative method was applied, with semi-structured interviews which were analysed using content analysis. The findings revealed that the teachers used different strategies during peer review depending on students’ knowledge level, social competence and the challenges and opportunities that the method offered. Despite a lack of knowledge about the English language and other variables such as different personalities and lack of self-confidence causing difficulties for students to implement peer review as intended, teachers still had positive attitudes towards peer review on written assignments in English. In order to enhance the implementation of peer review, both teachers and students need to become familiar with the practical implementation of the method. Future classroom research within the Swedish education system will help engender favourable conditions that move learning forward.

  • 4903.
    Abed, Shahla
    Umeå University, Faculty of Medicine, Department of Pharmacology and Clinical Neuroscience, Pharmacology.
    Is adiponectin secreted via caveolae?: The importance of caveolae for stimulated adiponectin secretion in obesity2018Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 4904.
    Abed, Shahla
    Umeå University, Faculty of Science and Technology, Department of Chemistry.
    Läkemedel mot Bcl-2 överuttryckande resistenta Prostatatumörer: Läkemedel mot Bcl-2 överuttryckande resistenta Prostatatumörer2015Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 4905.
    Abedali, Besma
    et al.
    Linnaeus University, Faculty of Social Sciences, Department of Social Work.
    Karlstrand, Moa
    Linnaeus University, Faculty of Social Sciences, Department of Social Work.
    ”Man ska vara den man är, men man blir lite större”: En kvalitativ studie om hur boendepersonal på HVB för ensamkommande barn förstår och omsätter begreppet ”integration”2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this study was to examine the concept of “integration” within residential care homes for unaccompanied children. More specifically its aim was to find out how the social workers themselves within residential care homes for unaccompanied children understand the concept of integration and how they work for it. The study was based on a qualitative semi-structured interviews with seven social workers within four residential care homes for unaccompanied children. Six themes were identified that seemed to play a role in the discussions about integration: development-acceptance, learning process, communication & relationships, process, personality and common sense. The analysis was based on previous research in the field and the theory of action by Pierre Bourdieu called practical reason. As a conclusion the first three themes can be seen as an understanding of the concept of “integration”. The last three themes exemplify the practical integration work. Despite the lack of regulatory documents, the social workers show a common understanding of the concept and a similar implementation which can be explained by a dominant implicit doxa within the field.

  • 4906.
    Abed-Al-Mouti, Mahmoud
    et al.
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    Gustafsson, Jimmie
    University West, Department of Social and Behavioural Studies, Division for Educational Science and Languages.
    ”Brinner läraren för fysiska aktiviteter så har barnen oftast mycket roligare”: En kvalitativ intervjustudie om fysisk aktivitet på fritidshemmet2019Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Bakgrund: Eftersom vi båda har ett stort intresse av fysisk aktivitet är det ett ämne vi brinner för. Som blivande fritidslärare var vi nyfikna på att undersöka vilka uppfattningar fritidslärarna har om fysisk aktivitet och vilka möjligheter det förekommer för eleverna att vara fysiskt aktiva på fritidshemmet.

    Syfte: Syftet med examensarbetet är att belysa fritidslärares uppfattningar kring fysisk aktivitet inom fritidshemmets verksamhet

    Metod: För att besvara frågeställningarna använde vi oss av kvalitativa intervjuer som insamlingsmetod.

    Resultat: Sammanfattningsvis visar vårt resultat att fritidslärarnas egna intressen har en stor påverkan på vilka aktiviteter som oftast utförs. Det framkommer också att fritidslärarna till viss del planerar de fysiska aktiviteterna utefter barnens intressen men att planeringstiden har en negativ påverkan på hur ofta planerade fysiska aktiviteter genomförs. I samtliga intervjuer nämns det att utomhusmiljön bidrar till stora möjligheter att främja fysisk aktivitet, men att olika skolmiljöer och skolgårdar kan se olika ut och därför måste man förhålla sig till det som finns. Däremot påpekas det att inomhusmiljön skapar svårigheter i att erbjuda fysisk aktivitet förutom några få inslag av exempelvis dansspel. Det som dock är genomgående i våra intervjuer är att samtliga fritidslärare anser att fritidsgympan i idrottshallen är den inomhusmiljö som främjar för fysisk aktivitet.

  • 4907.
    Abedan Kondori, Farid
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Bring Your Body into Action: Body Gesture Detection, Tracking, and Analysis for Natural Interaction2014Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Due to the large influx of computers in our daily lives, human-computer interaction has become crucially important. For a long time, focusing on what users need has been critical for designing interaction methods. However, new perspective tends to extend this attitude to encompass how human desires, interests, and ambitions can be met and supported. This implies that the way we interact with computers should be revisited. Centralizing human values rather than user needs is of the utmost importance for providing new interaction techniques. These values drive our decisions and actions, and are essential to what makes us human. This motivated us to introduce new interaction methods that will support human values, particularly human well-being.

    The aim of this thesis is to design new interaction methods that will empower human to have a healthy, intuitive, and pleasurable interaction with tomorrow’s digital world. In order to achieve this aim, this research is concerned with developing theories and techniques for exploring interaction methods beyond keyboard and mouse, utilizing human body. Therefore, this thesis addresses a very fundamental problem, human motion analysis.

    Technical contributions of this thesis introduce computer vision-based, marker-less systems to estimate and analyze body motion. The main focus of this research work is on head and hand motion analysis due to the fact that they are the most frequently used body parts for interacting with computers. This thesis gives an insight into the technical challenges and provides new perspectives and robust techniques for solving the problem.

  • 4908.
    Abedan Kondori, Farid
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Human Motion Analysis for Creating Immersive Experiences2012Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    From an early age, people display the ability to quickly and effortlessly interpret the orientation and movement of human body parts, thereby allowing one to infer the intentions of others who are nearby and to comprehend an important nonverbal form of communication. The ease with which one accomplishes this task belies the difficulty of a problem that has challenged computational systems for decades, human motion analysis.

    Technological developments over years have resulted into many systems for measuring body segment positions and angles between segments. In these systems human body is typically considered as a system of rigid links connected by joints. The motion is estimated by the use of measurements from mechanical, optical, magnetic, or inertial trackers. Among all kinds of sensors, optical sensing encompasses a large and varying collection of technologies.

    In a computer vision context, human motion analysis is a topic that studies methods and applications in which two or more consecutive images from an image sequences, e.g. captured by a video camera, are processed to produce information based on the apparent human body motion in the images.

    Many different disciplines employ motion analysis systems to capture movement and posture of human body for applications such as medical diagnostics, virtual reality, human-computer interaction etc.

    This thesis gives an insight into the state of the art human motion analysissystems, and provides new methods for capturing human motion.

  • 4909.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Liu, Li
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    3D Active Human Motion Estimation for Biomedical Applications2012In: World Congress on Medical Physics and Biomedical Engineering May 26-31, 2012, Beijing, China / [ed] Mian Long, Springer Berlin/Heidelberg, 2012, , p. 4p. 1014-1017Conference paper (Refereed)
    Abstract [en]

    Movement disorders forbid many people from enjoying their daily lives. As with other diseases, diagnosis and analysis are key issues in treating such disorders. Computer vision-based motion capture systems are helpful tools for accomplishing this task. However Classical motion tracking systems suffer from several limitations. First they are not cost effective. Second these systems cannot detect minute motions accurately. Finally they are spatially limited to the lab environment where the system is installed. In this project, we propose an innovative solution to solve the above-mentioned issues. Mounting the camera on human body, we build a convenient, low cost motion capture system that can be used by the patient while practicing daily-life activities. We refer to this system as active motion capture, which is not confined to the lab environment. Real-time experiments in our lab revealed the robustness and accuracy of the system.

  • 4910. Abedan Kondori, Farid
    et al.
    Yousefi, Shahrouz
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID. Department of Applied Physics and Electronics, Umeå University, Umeå, Sweden.
    Smart Baggage in Aviation2011In: Proceedings - 2011 IEEE International Conferences on Internet of Things and Cyber, Physical and Social Computing, 2011Conference paper (Refereed)
    Abstract [en]

    Nowadays, the Internet has dramatically changed the way people take the normal course of actions. By the recent growth of the Internet, connecting different objects to users through mobile phones and computers is no longer a dream. Aviation industry is one of the areas which have a strong potential to benefit from the Internet of Things. Among many problems related to air travel, delayed and lost luggage are the most common and irritating. Therefore, this paper suggests anew baggage control system, where users can simply track their baggage at the airport to avoid losing them. Attaching a particular pattern on the bag, which can be detected and localized from long distance by an ordinary camera, users are able to track their baggage. The proposed system is much cheaper than previous implementations and does not require sophisticated equipment.

  • 4911.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Smart Baggage in Aviation2011In: 2011 IEEE International Conferences on Internet of Things, and Cyber, Physical and Social Computing / [ed] Feng Xia, Zhikui Chen, Gang Pan, Laurence T. Yang, and Jianhua Ma, Los Alamitos: IEEE Computer Society, 2011, p. 620-623Conference paper (Refereed)
    Abstract [en]

    Nowadays, the Internet has dramatically changed the way people take the normal course of actions. By the recent growth of the Internet, connecting different objects to users through mobile phones and computers is no longer a dream. Aviation industry is one of the areas which have a strong potential to benefit from the Internet of Things. Among many problems related to air travel, delayed and lost luggage are the most common and irritating. Therefore, this paper suggests anew baggage control system, where users can simply track their baggage at the airport to avoid losing them. Attaching a particular pattern on the bag, which can be detected and localized from long distance by an ordinary camera, users are able to track their baggage. The proposed system is much cheaper than previous implementations and does not require sophisticated equipment.

  • 4912.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    KTH Royal Institute of Technology, Department of Media Technology and Interaction Design.
    Kouma, Jean-Paul
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Liu, Li
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    KTH Royal Institute of Technology, Department of Media Technology and Interaction Design.
    Direct hand pose estimation for immersive gestural interaction2015In: Pattern Recognition Letters, ISSN 0167-8655, E-ISSN 1872-7344, Vol. 66, p. 91-99Article in journal (Refereed)
    Abstract [en]

    This paper presents a novel approach for performing intuitive gesture based interaction using depth data acquired by Kinect. The main challenge to enable immersive gestural interaction is dynamic gesture recognition. This problem can be formulated as a combination of two tasks; gesture recognition and gesture pose estimation. Incorporation of fast and robust pose estimation method would lessen the burden to a great extent. In this paper we propose a direct method for real-time hand pose estimation. Based on the range images, a new version of optical flow constraint equation is derived, which can be utilized to directly estimate 3D hand motion without any need of imposing other constraints. Extensive experiments illustrate that the proposed approach performs properly in real-time with high accuracy. As a proof of concept, we demonstrate the system performance in 3D object manipulation On two different setups; desktop computing, and mobile platform. This reveals the system capability to accommodate different interaction procedures. In addition, a user study is conducted to evaluate learnability, user experience and interaction quality in 3D gestural interaction in comparison to 2D touchscreen interaction.

  • 4913. Abedan Kondori, Farid
    et al.
    Yousefi, Shahrouz
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Li, Haibo
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Direct Head Pose Estimation Using Kinect-type Sensors2014In: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911XArticle in journal (Refereed)
  • 4914.
    Abedan Kondori, Farid
    et al.
    Umeå universitet.
    Yousefi, Shahrouz
    KTH Royal Institute of Technology.
    Li, Haibo
    KTH Royal Institute of Technology.
    Direct three-dimensional head pose estimation from Kinect-type sensors2014In: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 50, no 4, p. 268-270Article in journal (Refereed)
    Abstract [en]

    A direct method for recovering three-dimensional (3D) head motion parameters from a sequence of range images acquired by Kinect sensors is presented. Based on the range images, a new version of the optical flow constraint equation is derived, which can be used to directly estimate 3D motion parameters without any need of imposing other constraints. Since all calculations with the new constraint equation are based on the range images, Z(xyt), the existing techniques and experiences developed and accumulated on the topic of motion from optical flow can be directly applied simply by treating the range images as normal intensity images I(xyt). In this reported work, it is demonstrated how to employ the new optical flow constraint equation to recover the 3D motion of a moving head from the sequences of range images, and furthermore, how to use an old trick to handle the case when the optical flow is large. It is shown, in the end, that the performance of the proposed approach is comparable with that of some of the state-of-the-art approaches that use range data to recover 3D motion parameters.

  • 4915.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Direct three-dimensional head pose estimation from Kinect-type sensors2014In: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 50, no 4, p. 268-270Article in journal (Refereed)
    Abstract [en]

    A direct method for recovering three-dimensional (3D) head motion parameters from a sequence of range images acquired by Kinect sensors is presented. Based on the range images, a new version of the optical flow constraint equation is derived, which can be used to directly estimate 3D motion parameters without any need of imposing other constraints. Since all calculations with the new constraint equation are based on the range images, Z(xyt), the existing techniques and experiences developed and accumulated on the topic of motion from optical flow can be directly applied simply by treating the range images as normal intensity images I(xyt). In this reported work, it is demonstrated how to employ the new optical flow constraint equation to recover the 3D motion of a moving head from the sequences of range images, and furthermore, how to use an old trick to handle the case when the optical flow is large. It is shown, in the end, that the performance of the proposed approach is comparable with that of some of the state-of-the-art approaches that use range data to recover 3D motion parameters.

  • 4916.
    Abedan Kondori, Farid
    et al.
    Umeå University.
    Yousefi, Shahrouz
    Umeå University.
    Li, Haibo
    Umeå University.
    Gesture Tracking for 3D Interaction in Augmented Environments2011In: Proceeding of The Swedish Symposium on Image Analysis (SSBA2011), Linköping, Sweden, 2011Conference paper (Other academic)
  • 4917.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Gesture Tracking for 3D Interaction in Augmented Environments2011Conference paper (Other academic)
  • 4918.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Real 3D Interaction Behind Mobile Phones for Augmented Environments2011In: 2011 IEEE International Conference on Multimedia and Expo (ICME), IEEE conference proceedings, 2011, p. 1-6Conference paper (Refereed)
    Abstract [en]

    Number of mobile devices such as mobile phones or PDAs has been dramatically increased over the recent years. New mobile devices are equipped with integrated cameras and large displays which make the interaction with device easier and more efficient. Although most of the previous works on interaction between humans and mobile devices are based on 2D touch-screen displays, camera-based interaction opens a new way to manipulate in 3D space behind the device in the camera's field of view. This paper suggests the use of particular patterns from local orientation of the image called Rotational Symmetries to detect and localize human gesture. Relative rotation and translation of human gesture between consecutive frames are estimated by means of extracting stable features. Consequently, this information can be used to facilitate the 3D manipulation of virtual objects in various applications in mobile devices.

  • 4919.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Sonning, Samuel
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Sonning, Sabina
    3D Head Pose Estimation Using the Kinect2011Conference paper (Refereed)
    Abstract [en]

    Head pose estimation plays an essential role for bridging the information gap between humans and computers. Conventional head pose estimation methods are mostly done in images captured by cameras. However accurate and robust pose estimation is often problematic. In this paper we present an algorithm for recovering the six degrees of freedom (DOF) of motion of a head from a sequence of range images taken by the Microsoft Kinectfor Xbox 360. The proposed algorithm utilizes a least-squares minimization of the difference between themeasured rate of change of depth at a point and the rate predicted by the depth rate constraint equation. We segment the human head from its surroundings and background, and then we estimate the head motion. Our system has the capability to recover the six DOF of the head motion of multiple people in one image. Theproposed system is evaluated in our lab and presents superior results.

  • 4920.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Liu, Li
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Active human gesture capture for diagnosing and treating movement disorders2013Conference paper (Other academic)
    Abstract [en]

    Movement disorders prevent many people fromenjoying their daily lives. As with other diseases, diagnosisand analysis are key issues in treating such disorders.Computer vision-based motion capture systems are helpfultools for accomplishing this task. However Classical motiontracking systems suffer from several limitations. First theyare not cost effective. Second these systems cannot detectminute motions accurately. Finally they are spatially limitedto the lab environment where the system is installed. In thisproject, we propose an innovative solution to solve the abovementionedissues. Mounting the camera on human body, webuild a convenient, low cost motion capture system that canbe used by the patient in daily-life activities. We refer tothis system as active motion capture, which is not confinedto the lab environment. Real-time experiments in our labrevealed the robustness and accuracy of the system.

  • 4921. Abedan Kondori, Farid
    et al.
    Yousefi, Shahrouz
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID.
    Liu, Li
    Li, Haibo
    KTH, School of Computer Science and Communication (CSC), Media Technology and Interaction Design, MID. Nanjing University of Posts and Telecommunications, Nanjing, China .
    Head Operated Electric Wheelchair2014In: Proceedings of the IEEE Southwest Symposium on Image Analysis and Interpretation, 2014, p. 53-56Conference paper (Refereed)
    Abstract [en]

    Currently, the most common way to control an electric wheelchair is to use joystick. However, there are some individuals unable to operate joystick-driven electric wheelchairs due to sever physical disabilities, like quadriplegia patients. This paper proposes a novel head pose estimation method to assist such patients. Head motion parameters are employed to control and drive an electric wheelchair. We introduce a direct method for estimating user head motion, based on a sequence of range images captured by Kinect. In this work, we derive new version of the optical flow constraint equation for range images. We show how the new equation can be used to estimate head motion directly. Experimental results reveal that the proposed system works with high accuracy in real-time. We also show simulation results for navigating the electric wheelchair by recovering user head motion.

  • 4922.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    KTH Royal Institute of Technology, Department of Media Technology and Interaction Design.
    Liu, Li
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    KTH Royal Institute of Technology, Department of Media Technology and Interaction Design.
    Head operated electric wheelchair2014In: IEEE Southwest Symposium on Image Analysis and Interpretation (SSIAI 2014), IEEE , 2014, p. 53-56Conference paper (Refereed)
    Abstract [en]

    Currently, the most common way to control an electric wheelchair is to use joystick. However, there are some individuals unable to operate joystick-driven electric wheelchairs due to sever physical disabilities, like quadriplegia patients. This paper proposes a novel head pose estimation method to assist such patients. Head motion parameters are employed to control and drive an electric wheelchair. We introduce a direct method for estimating user head motion, based on a sequence of range images captured by Kinect. In this work, we derive new version of the optical flow constraint equation for range images. We show how the new equation can be used to estimate head motion directly. Experimental results reveal that the proposed system works with high accuracy in real-time. We also show simulation results for navigating the electric wheelchair by recovering user head motion.

  • 4923.
    Abedan Kondori, Farid
    et al.
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Yousefi, Shahrouz
    Ostovar, Ahmad
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Liu, Li
    Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics.
    Li, Haibo
    A Direct Method for 3D Hand Pose Recovery2014In: 22nd International Conference on Pattern Recognition, 2014, p. 345-350Conference paper (Refereed)
    Abstract [en]

    This paper presents a novel approach for performing intuitive 3D gesture-based interaction using depth data acquired by Kinect. Unlike current depth-based systems that focus only on classical gesture recognition problem, we also consider 3D gesture pose estimation for creating immersive gestural interaction. In this paper, we formulate gesture-based interaction system as a combination of two separate problems, gesture recognition and gesture pose estimation. We focus on the second problem and propose a direct method for recovering hand motion parameters. Based on the range images, a new version of optical flow constraint equation is derived, which can be utilized to directly estimate 3D hand motion without any need of imposing other constraints. Our experiments illustrate that the proposed approach performs properly in real-time with high accuracy. As a proof of concept, we demonstrate the system performance in 3D object manipulation. This application is intended to explore the system capabilities in real-time biomedical applications. Eventually, system usability test is conducted to evaluate the learnability, user experience and interaction quality in 3D interaction in comparison to 2D touch-screen interaction.

  • 4924. Abedelbari, Shereen
    Elektrisk stimulerings effekt på post-stroke spasticitet och motorfunktion2014Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • 4925. Abedi, Ali
    A study of appropriateness of information system development approach in preliminary investigation phase2002Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the existence of over a 1000 different Information System Development Methodologies (ISDM). Given the effort directed to development of ISDMs one would expect a lively discussion on how to select methodologies in practice and how to catalogue them as a perquisite to study the merits of various features and identify the most useful ones per project situation. However neither seems the case. One serious deficiency in Information Systems management is the lack of recognition that different projects require different managerial approaches. Although, there are enormous methodologies/design approaches in academic world and business world usually they can be grouped based on certain common characteristics. This research examines the relationship between information systems development methods and the characteristics of the domain in which they are used and the organizational policy regarding development approach adoption and adaptation per project. The fundamental theme in this research is based on a simple question of “how developer makes an informed choice for the selection of preferred Information System Development Approach (ISDA) by considering project characteristics?” The main proposition in this research is: cognition of complexity, uncertainty and formality of the work context will narrow down the choices to groups of approaches based on their two important characteristics namely mode of operation and means of expression. To examine and answer the research questions, a large-scale online survey was carried out targeted at companies with direct systems development exposure. Utilizing the theory and data retrieved from the survey, findings of the research is that adoption of information systems development approach based on project characteristics has a higher success rate compared to those not adopted in regards to project characteristics. The other finding is that cognition of project degree of complexity and uncertainty is necessary but not sufficient for making the adoption choice. In other words: non-project factors such as management of the approach and the risk associated with the approach should be taken into consideration in addition to the project characteristics for that matter.

  • 4926.
    Abedi, Ali
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Industrial Economics and Management (Dept.).
    Falk, Sebastian
    KTH, School of Industrial Engineering and Management (ITM), Industrial Economics and Management (Dept.).
    Motivation på byggarbetsplatsen2011Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Working as a craftsman on a construction site is a demanding job, both physically and psychologically. Tight schedules, hard conditions or challenging task awaits the craftsman each new working day. In order to complete a successful project the craftsmen are required to perform high results and show great commitment to their work. Motivation is thereby a key factor and a necessity for every successful project. The following study will investigate how the site management motivates their craftsmen and also how motivation can contribute to more successful construction projects.

    The study is based upon literature covering motivation, leadership and groups. Also, quantitative and qualitative studies have been performed in the form of personal interviews and surveys. The study has been performed on three similarly construction projects, all belong to Peab bostad. Each site manager has been interviewed and the craftsmen have participated in a survey. The craftsmen experienced that their salary was the biggest source of motivation. Other softer factors such as fellowship and appreciation were also important, though not in the same extent as the monetary rewards. The site management shared the craftsmen’s opinions; however one common thought was that the softer factor would have bigger influence on the motivation.

    The result of the study clearly shows that the salary is and remains a big factor of motivation for the craftsmen. However the key to high and long ‐standing motivation lies within the development of the softer factors. The study shows that a high motivation leads to a higher well‐being and commitment to the project. This contributes in making the projects more profitable and thereby successful.

    To obtain this high motivation effort and planning from the site management is required. The implementation of daily rounds on the site has shown to be an effective way to enhance the motivation. During these rounds the site manger discusses problems and plans upcoming tasks in an informal manner. When the craftsmen feel noticed, appreciated and that their ideas can influence the project their motivation will enhance. The site manager also needs to create opportunities for the craftsmen so they can continue to perform on a high level and give them the liberty to control their own work. The study can be summed up in that freedom under responsibility, appreciation, participation, thoughtful planning and a high salary are the main factors that will create a high long lasting motivation amongst the crafts men

  • 4927.
    Abedi, Aref
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
    Wallsten, Jakob
    KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
    Beslutsfattande inom Produktutveckling: Kartläggning, analysering & vidareutveckling av PPM process på ett medtech företag2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The number of ideas at innovative companies usually exceeds the amount of available human or

    material recourses, this include ideas for development of new products. Since they are not able to do

    everything they want to do they have to choose between ideas to develop new products. This includes

    the decision on when to start, stop or kill a project as well as the thought process of prioritizing between

    ongoing and potential projects.

    Project Portfolio Management (PPM) is an organizational process, with the purpose of systematically

    organizing and running the activities that aim to evaluate, select and prioritize ideas and projects for

    developing new products. PPM include four major goals to be fulfilled; Maximizing Value of the

    Portfolio, Achieving a Balanced Portfolio, Achieving a Strategic Alignment and Running the Right

    Number of Projects.

    The purpose of the thesis was to develop a more visual and formal PPM process for the early stages in

    product development in one department at St Jude Medical AB, Sweden.

    The thesis was conducted by following a methodology known as Process Modules. The methodology is

    an approach for developing a PPM process that fits a specific company. The methodology is not a

    defined work procedure for decision making but rather a systematic method for developing one.

    The thesis was conducted by working closely with a defined Work Group consisting of six decision

    makers at St Jude Medical AB, Sweden. Initially, the authors managed to map the current PPM process

    at the department in focus which showed to be rather informal and not using formal criteria. Together

    with the Work Group, the process was formalized and visualized. During a workshop, a set of selection

    criteria were identified and defined, and so was a set of balance criteria. Finally, the new PPM process

    was defined and visualized by the authors.

    A number of overall important reflections were concluded by the authors after conducting this master

    thesis. The main reflection is the fact that every PPM process is, and needs to be, company specific.

    Further on, when developing a PPM process it is of great importance to involve management and

    involved staff in the actual procedure, in order to increase the understanding of the final process.

  • 4928.
    Abedi, Mohammad R.
    et al.
    Örebro University Hospital. Department of Laboratory Medicine, Section for Transfusion Medicine.
    Doverud, Ann-Charlotte
    Department of Laboratory Medicine, Section for Transfusion Medicine, Örebro University Hospital. Örebro, Sweden.
    Preparation and Pathogen Inactivation of Double Dose Buffy Coat Platelet Products using the INTERCEPT Blood System2012In: Journal of Visualized Experiments, ISSN 1940-087X, E-ISSN 1940-087X, no 70, article id UNSP e4414Article in journal (Refereed)
    Abstract [en]

    Blood centers are faced with many challenges including maximizing production yield from the blood product donations they receive as well as ensuring the highest possible level of safety for transfusion patients, including protection from transfusion transmitted diseases. This must be accomplished in a fiscally responsible manner which minimizes operating expenses including consumables, equipment, waste, and personnel costs, among others.

    Several methods are available to produce platelet concentrates for transfusion. One of the most common is the buffy coat method in which a single therapeutic platelet unit (>= 2.0 x10(11) platelets per unit or per local regulations) is prepared by pooling the buffy coat layer from up to six whole blood donations. A procedure for producing "double dose" whole blood derived platelets has only recently been developed.

    Presented here is a novel method for preparing double dose whole blood derived platelet concentrates from pools of 7 buffy coats and subsequently treating the double dose units with the INTERCEPT Blood System for pathogen inactivation. INTERCEPT was developed to inactivate viruses, bacteria, parasites, and contaminating donor white cells which may be present in donated blood. Pairing INTERCEPT with the double dose buffy coat method by utilizing the INTERCEPT Processing Set with Dual Storage Containers (the "DS set"), allows blood centers to treat each of their double dose units in a single pathogen inactivation processing set, thereby maximizing patient safety while minimizing costs. The double dose buffy coat method requires fewer buffy coats and reduces the use of consumables by up to 50% (e.g. pooling sets, filter sets, platelet additive solution, and sterile connection wafers) compared to preparation and treatment of single dose buffy coat platelet units. Other cost savings include less waste, less equipment maintenance, lower power requirements, reduced personnel time, and lower collection cost compared to the apheresis technique.

  • 4929.
    Abedi, Shiva Masoumeh
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Ecotechnology and Sustainable Building Engineering.
    Considering a sustainable approach tonitrogen removal of waste waterin south-west Iran2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Pollution of the drinking water environment has long been thought to be a primary cause of diseases. According to environmental research, there is a global water quality crisis. From an environmental stand point, eutrophication or accumulation of nitrates in wastewater are expected to cause high ammonium, low pH and increased nitrate concentrations [Koren et al. 2000] which are a critical form of nitrogen that needs our attention. This study considers the case of eutrophication in south-west Iran. This region is located in the Khuzestan province and consists of two basins (Karun and Dez) which can be seen as susceptible to the effect of eutrophication. This paper analyses the environmental pollution impact, economic, and social approaches of two waste water treatment plants. The case study focuses on a waste water treatment plant operated by activated sludge in Iran and the reference study is technology combined Sharon-Anammox treatment in Netherlands. The environmental impact assessment of these Waste Water Treatment Plants (WWTPs) has been analyzed by a Triple Bottom Line method. The hypothesis is to prove a general and specific outlook of the lowest environmental emissions, the lowest costs and creation of better welfare. The other method applied in this study is the barriers of transferring technology. The results show that the combined Sharon-Anammox method is able to significantly reduce the environmental impact based on the methods applied in this study.In this study, the generally considered barriers are problems of methods of transferring combined Sharon-Anammox technology to Iran and the possible obstacles that may be encountered in the transfer of technology to Iran. The result of this study is estimated with respect to an evaluation of political, environmental, economic, social, and technological capacity. The result is that most potential problems are political and economic in nature, which may be because these two issues are so closely related to each other. In this case, lack of management is a problem in the institution of policy, and could affect the economic situation. In fact each of the barriers could be overlapped and affect each other. Regarding all barriers and problems that are in the process of transferring technology, Iran as a developing country would be able to receive technologies.

  • 4930.
    Abedi Valugerdi, Natasha
    Stockholm University, Faculty of Law, Department of Law.
    Parallel trade of pharmaceutical drugs within the European Union: a competition law perspective2017Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 4931.
    Abedian, Emil
    et al.
    Uppsala University, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Faculty of Social Sciences, Department of Business Studies.
    Mattsson, Mattias
    Uppsala University, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Faculty of Social Sciences, Department of Business Studies.
    Revisionsplikt: Mikroföretagens inställning till revision och revisorer2005Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 4932.
    Abedian, Emil
    et al.
    Uppsala University, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Faculty of Social Sciences, Department of Business Studies.
    Pettersson, Helene
    Uppsala University, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Faculty of Social Sciences, Department of Business Studies.
    "REVISORN SKA INTE BEHÖVA VARA NÅGON STÅLMANNEN": En efterfrågestudie av revisorsproven2005Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
  • 4933.
    ABEDIAN SANANDAJI, FOAD
    Örebro University, School of Humanities, Education and Social Sciences.
    Brottsprevention och tygghetsarbete i stadsplaneringen.: En fallstudie om trygghet och trivsel i Brickebacken.2008Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 4934.
    Abedian Sanandaji, Foad
    Örebro University, Swedish Business School at Örebro University.
    Imageskapande och marknadsföringskommunikation: En deskriptiv studie om Örebro Bostäders arbete i Vivalla och Markbacken2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The conclusion made after finishing this essay is that Örebro Bostäder AB desires to communicate an image of Vivalla as an area with a unique and personal environment with small individual neighborhoods where there is something for everyone. In Markbacken Öbo wants to retain and reinforce the image of variety, where everything from children's families is attracted to those looking for a little more exclusive accommodations. Further investigation has shown that these desirable images mainly are communicated through mouth to mouth method,media, community activities and events.

  • 4935. Abedifar, V.
    et al.
    Furdek, Marija
    KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
    Muhammad, Ajmal
    KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
    Eshghi, M.
    Wosinska, Lena
    KTH, School of Electrical Engineering and Computer Science (EECS), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
    Routing, modulation format, spectrum and core allocation in SDM networks based on programmable filterless nodes2018In: Optics InfoBase Conference Papers, Optics Info Base, Optical Society of America, 2018Conference paper (Refereed)
    Abstract [en]

    An RMSCA approach based on binary particle swarm optimization is proposed for programmable filterless SDM networks, aimed at minimizing core and spectrum usage. Nearoptimal resource consumption.

  • 4936. Abedifar, Vahid
    et al.
    Furdek, Marija
    KTH, School of Electrical Engineering and Computer Science (EECS).
    Muhammad, Ajmal
    KTH, School of Electrical Engineering and Computer Science (EECS).
    Eshghi, Mohammad
    Wosinska, Lena
    KTH, School of Electrical Engineering and Computer Science (EECS).
    Routing, Modulation and Spectrum Assignment in Programmable Networks based on Optical White Boxes2018In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 10, no 9, p. 723-735Article in journal (Refereed)
    Abstract [en]

    Elastic optical networks (EONs) can help overcome the flexibility challenges imposed by emerging heterogeneous and bandwidth-intensive applications. Among the different solutions for flexible optical nodes, optical white box switches implemented by architecture on demand (AoD) have the capability to dynamically adapt their architecture and module configuration to the switching and processing requirements of the network traffic. Such adaptability allows for unprecedented flexibility in balancing the number of required nodal components in the network, spectral resource usage, and length of the established paths. To investigate these trade-offs and achieve cost-efficient network operation, we formulate the routing, modulation, and spectrum assignment (RMSA) problem in AoD-based EONs and propose three RMSA strategies aimed at optimizing a particular combination of these performance indicators. The strategies rely on a newly proposed internal node configuration matrix that models the structure of optical white box nodes in the network, thus facilitating hardware-aware routing of connection demands. The proposed strategies are evaluated in terms of the number of required modules and the related cost, spectral resource usage, and average path length. Extensive simulation results show that the proposed RMSA strategies can achieve remarkable cost savings by requiring fewer switching modules than the benchmarking approaches, at a favorable trade-off with spectrum usage and path length.

  • 4937.
    Abedin, Ahmad
    et al.
    KTH, School of Information and Communication Technology (ICT), Electronics, Integrated devices and circuits.
    Asadollahi, Ali
    KTH, School of Information and Communication Technology (ICT), Electronics, Integrated devices and circuits.
    Garidis, Konstantinos
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Hellström, Per-Erik
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Östling, Mikael
    KTH, School of Information and Communication Technology (ICT), Electronics.
    Epitaxial growth of Ge strain relaxed buffer on Si with low threading dislocation density2016In: ECS Transactions, Electrochemical Society, 2016, no 8, p. 615-621Conference paper (Refereed)
    Abstract [en]

    Epitaxial Ge with low dislocation density is grown on a low temperature grown Ge seed layer on Si substrate by reduced pressure chemical vapor deposition. The surface topography measured by AFM shows that the strain relaxation occurred through pit formation which resulted in freezing the defects at Ge/Si interface. Moreover a lower threading dislocation density compared to conventional strain relaxed Ge buffers on Si was observed. We show that by growing the first layer at temperatures below 300 °C a surface roughness below 1 nm can be achieved together with carrier mobility enhancement. The different defects densities revealed from SECCO and Iodine etching shows that the defects types have been changed and SECCO is not always trustable.

  • 4938.
    Abedin, Ahmad
    et al.
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Moeen, Mahdi
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Cappetta, Carmine
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Östling, Mikael
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Radamson, Henry H.
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Sensitivity of the crystal quality of SiGe layers grown at low temperatures by trisilane and germane2016In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 613, p. 38-42Article in journal (Refereed)
    Abstract [en]

    This work investigates the crystal quality of SiGe layers grown at low temperatures using trisilane, and germane precursors. The crystal quality sensitivity was monitored for hydrogen chloride and/or minor oxygen amount during SiGe epitaxy or at the interface of SiGe/Si layers. The quality of the epi-layerswas examined by quantifying noise parameter, K-1/f obtained from the power spectral density vs. 1/f curves. The results indicate that while it is difficult to detect small defect densities in SiGe layers by physical material characterization, the noise measurement could reveal the effects of oxygen contamination as low as 0.16mPa inside and in the interface of the layers.

  • 4939.
    Abedin, Ahmad
    et al.
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Noroozi, Mohammad
    KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.
    Primetzhofer, Daniel
    Östling, Mikael
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    Radamson, Henry.H
    KTH, School of Information and Communication Technology (ICT), Integrated Devices and Circuits.
    GeSnSi CVD Epitaxy using Silane, Germane, Digermane, and Tin tetrachlorideArticle in journal (Refereed)
    Abstract [en]

    In this study, strain relaxed and compressive strained Ge1-x-ySnxSiy (0.015≤x≤0.15 and 0≤y≤0.15) layers were epitaxially grown on Si substrate in a chemical vapor deposition reactor at atmospheric pressure. Digermane (Ge2H6) and germane (GeH4) were used as Ge precursors and tin tetrachloride (SnCl4) was used as Sn precursor. The growth temperature was kept below 400ᵒC to suppress Sn out diffusion. The layers crystal quality and strain were characterized using XRD, high resolution reciprocal lattice mapping and transmission electron microscopy and the surface morphology was investigated by atomic force microscopy (AFM). Furthermore, the low temperature epitaxial growth up to 15% Si atoms incorporation in Ge0.94Sn0.06 was demonstrated by adding silane (SiH4) as Si precursor. Sn contents calculated from high resolution XRD patterns were confirmed by Rutherford backscattering spectroscopy which shows that Sn atoms are mostly positioned in substitutional sites. AFM analysis showed below 1nm surface roughness for both strained and strain relaxed GeSn layers which make the promising materials for photonics and electronics applications.

  • 4940.
    Abedin, Ahmad
    et al.
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics, Integrated devices and circuits.
    Zurauskaite, Laura
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics, Integrated devices and circuits.
    Asadollahi, Ali
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics, Integrated devices and circuits. KTH.
    GOI fabrication for Monolithic 3D integrationIn: Article in journal (Other academic)
  • 4941.
    Abedin, Ahmad
    et al.
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Zurauskaite, Laura
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Asadollahi, Ali
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Garidis, Konstantinos
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Jayakumar, Ganesh
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Malm, B. Gunnar
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Hellström, Per-Erik
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Östling, Mikael
    KTH, School of Electrical Engineering and Computer Science (EECS).
    Germanium on Insulator Fabrication for Monolithic 3-D Integration2018In: IEEE Journal of the Electron Devices Society, ISSN 2168-6734, Vol. 6, no 1, p. 588-593Article in journal (Refereed)
    Abstract [en]

    A low temperature (T-max = 350 degrees C) process for Germanium (Ge) on insulator (GOI) substrate fabrication with thicknesses of less than 25 nm is reported in this paper. The process is based on a single step epitaxial growth of a Ge/SiGe/Ge stack on Si, room temperature wafer bonding and an etch-back process using Si0.5Ge0.5 as an etch-stop layer. GOI substrates with surface roughness below 0.5 nm, 0.15% tensile strain, thickness nonuniformity of less than 3 nm and residual p-type doping of less than 1016 cm(-3) were fabricated. Ge pFETs are fabricated (T-max = 600 degrees C) on the GOI wafer with 70% yield. The devices exhibit a negative threshold voltage of -0.18 V and 60% higher mobility than the SOI pFET reference devices.

  • 4942.
    Abedin, Ahmad
    et al.
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Zurauskaite, Laura
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Asadollahi, Ali
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Garidis, Konstantinos
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Jayakumar, Ganesh
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Malm, B. Gunnar
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Hellström, Per-Erik
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    Östling, Mikael
    KTH, School of Electrical Engineering and Computer Science (EECS), Electronics.
    GOI fabrication for monolithic 3D integration2018In: 2017 IEEE SOI-3D-Subthreshold Microelectronics Unified Conference, S3S 2017, Institute of Electrical and Electronics Engineers (IEEE), 2018, Vol. 2018, p. 1-3Conference paper (Refereed)
    Abstract [en]

    A low temperature (Tmax=350 °C) process for Ge on insulator (GOI) substrate fabrication with thicknesses of less than 25 nm is reported in this work. The process is based on a single step epitaxial growth of a Ge/SiGe/Ge stack on Si, room temperature wafer bonding, and an etch-back process using Si0.5Ge0.5 as an etch-stop layer. Using this technique, GOI substrates with surface roughness below 0.5 nm, thickness nonuniformity of less than 3 nm, and residual p-type doping of less than 1016 cm-3 are achieved. Ge pFETs are fabricated (Tmax=600 °C) on the GOI wafer with 70% yield. The devices exhibit a negative threshold voltage of-0.18 V and 60% higher mobility than the SOI pFET reference devices.

  • 4943.
    Abedin, Arian
    et al.
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Optimization and Systems Theory.
    Ligai, Wolmir
    KTH, School of Engineering Sciences (SCI), Mathematics (Dept.), Optimization and Systems Theory.
    Automatingand optimizing pile group design using a Genetic Algorithm2018Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In bridge design, a set of piles is referred to as a pile group. The design process of pile groups employed by many firms is currently manual, time consuming, and produces pile groups that are not robust against placement errors.

    This thesis applies the metaheuristic method Genetic Algorithm to automate and improve the design of pile groups for bridge column foundations. A software is developed and improved by implementing modifications to the Genetic Algorithm. The algorithm is evaluated by the pile groups it produces, using the Monte Carlo method to simulate errors for the purpose of testing the robustness. The results are compared with designs provided by the consulting firm Tyrens AB.

    The software is terminated manually, and generally takes less than half an hour to produce acceptable pile groups. The developed Genetic Algorithm Software produces pile groups that are more robust than the manually designed pile groups to which they are compared, using the Monte Carlo method. However, due to the visually disorganized designs, the pile groups produced by the algorithm may be di cult to get approved by Trafikverket. The software might require further modifications addressing this problem before it can be of practical use.

  • 4944.
    Abedin, Md Reaz Ashraful
    et al.
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Bensch, Suna
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Hellström, Thomas
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Self-supervised language grounding by active sensing combined with Internet acquired images and text2017In: Proceedings of the Fourth International Workshop on Recognition and Action for Scene Understanding (REACTS2017) / [ed] Jorge Dias George Azzopardi, Rebeca Marf, Málaga: REACTS , 2017, p. 71-83Conference paper (Refereed)
    Abstract [en]

    For natural and efficient verbal communication between a robot and humans, the robot should be able to learn names and appearances of new objects it encounters. In this paper we present a solution combining active sensing of images with text based and image based search on the Internet. The approach allows the robot to learn both object name and how to recognise similar objects in the future, all self-supervised without human assistance. One part of the solution is a novel iterative method to determine the object name using image classi- fication, acquisition of images from additional viewpoints, and Internet search. In this paper, the algorithmic part of the proposed solution is presented together with evaluations using manually acquired camera images, while Internet data was acquired through direct and reverse image search with Google, Bing, and Yandex. Classification with multi-classSVM and with five different features settings were evaluated. With five object classes, the best performing classifier used a combination of Pyramid of Histogram of Visual Words (PHOW) and Pyramid of Histogram of Oriented Gradient (PHOG) features, and reached a precision of 80% and a recall of 78%.

  • 4945.
    Abedin, Md. Zainal
    et al.
    University of Science and Technology Chittagong.
    Chowdhury, Abu Sayeed
    University of Science and Technology Chittagong.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Karim, Razuan
    University of Science and Technology Chittagong.
    An Interoperable IP based WSN for Smart Irrigation Systems2017Conference paper (Refereed)
    Abstract [en]

    Wireless Sensor Networks (WSN) have been highly developed which can be used in agriculture to enable optimal irrigation scheduling. Since there is an absence of widely used available methods to support effective agriculture practice in different weather conditions, WSN technology can be used to optimise irrigation in the crop fields. This paper presents architecture of an irrigation system by incorporating interoperable IP based WSN, which uses the protocol stacks and standard of the Internet of Things paradigm. The performance of fundamental issues of this network is emulated in Tmote Sky for 6LoWPAN over IEEE 802.15.4 radio link using the Contiki OS and the Cooja simulator. The simulated results of the performance of the WSN architecture presents the Round Trip Time (RTT) as well as the packet loss of different packet size. In addition, the average power consumption and the radio duty cycle of the sensors are studied. This will facilitate the deployment of a scalable and interoperable multi hop WSN, positioning of border router and to manage power consumption of the sensors.

  • 4946.
    Abedin, Md. Zainal
    et al.
    University of Science and Technology, Chittagong.
    Paul, Sukanta
    University of Science and Technology, Chittagong.
    Akhter, Sharmin
    University of Science and Technology, Chittagong.
    Siddiquee, Kazy Noor E Alam
    University of Science and Technology, Chittagong.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Selection of Energy Efficient Routing Protocol for Irrigation Enabled by Wireless Sensor Networks2017In: Proceedings of 2017 IEEE 42nd Conference on Local Computer Networks Workshops, Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 75-81Conference paper (Refereed)
    Abstract [en]

    Wireless Sensor Networks (WSNs) are playing remarkable contribution in real time decision making by actuating the surroundings of environment. As a consequence, the contemporary agriculture is now using WSNs technology for better crop production, such as irrigation scheduling based on moisture level data sensed by the sensors. Since WSNs are deployed in constraints environments, the life time of sensors is very crucial for normal operation of the networks. In this regard routing protocol is a prime factor for the prolonged life time of sensors. This research focuses the performances analysis of some clustering based routing protocols to select the best routing protocol. Four algorithms are considered, namely Low Energy Adaptive Clustering Hierarchy (LEACH), Threshold Sensitive Energy Efficient sensor Network (TEEN), Stable Election Protocol (SEP) and Energy Aware Multi Hop Multi Path (EAMMH). The simulation is carried out in Matlab framework by using the mathematical models of those algortihms in heterogeneous environment. The performance metrics which are considered are stability period, network lifetime, number of dead nodes per round, number of cluster heads (CH) per round, throughput and average residual energy of node. The experimental results illustrate that TEEN provides greater stable region and lifetime than the others while SEP ensures more througput.

  • 4947.
    Abedin, Md. Zainal
    et al.
    University of Science and Technology, Chittagong.
    Siddiquee, Kazy Noor E Alam
    University of Science and Technology Chittagong.
    Bhuyan, M. S.
    University of Science & Technology Chittagong.
    Karim, Razuan
    University of Science and Technology Chittagong.
    Hossain, Mohammad Shahadat
    University of Chittagong, Bangladesh.
    Andersson, Karl
    Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
    Performance Analysis of Anomaly Based Network Intrusion Detection Systems2018In: Proveedings of the 43nd IEEE Conference on Local Computer Networks Workshops (LCN Workshops), Piscataway, NJ: IEEE Computer Society, 2018, p. 1-7Conference paper (Refereed)
    Abstract [en]

    Because of the increased popularity and fast expansion of the Internet as well as Internet of things, networks are growing rapidly in every corner of the society. As a result, huge amount of data is travelling across the computer networks that lead to the vulnerability of data integrity, confidentiality and reliability. So, network security is a burning issue to keep the integrity of systems and data. The traditional security guards such as firewalls with access control lists are not anymore enough to secure systems. To address the drawbacks of traditional Intrusion Detection Systems (IDSs), artificial intelligence and machine learning based models open up new opportunity to classify abnormal traffic as anomaly with a self-learning capability. Many supervised learning models have been adopted to detect anomaly from networks traffic. In quest to select a good learning model in terms of precision, recall, area under receiver operating curve, accuracy, F-score and model built time, this paper illustrates the performance comparison between Naïve Bayes, Multilayer Perceptron, J48, Naïve Bayes Tree, and Random Forest classification models. These models are trained and tested on three subsets of features derived from the original benchmark network intrusion detection dataset, NSL-KDD. The three subsets are derived by applying different attributes evaluator’s algorithms. The simulation is carried out by using the WEKA data mining tool.

  • 4948.
    Abedin, Pedram
    et al.
    Linnaeus University, Faculty of Social Sciences, Department of pedagogy.
    Pihl, Oskar
    Linnaeus University, Faculty of Social Sciences, Department of pedagogy.
    Ungdomar på SiS-institution: -Personalens uppfattning om och upplevelser av aggressivt beteende2013Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Syftet med denna studie var att få en inblick och förståelse för personalens uppfattningar om och upplevelser av ungdomars aggressiva beteenden som befinner sig på en SiS-institution. Dessutom har personalens bemötande gentemot dessa ungdomar belysts från svaren och resultaten av frågeställningarna. En kvalitativ forskningsmetod med utgångspunkt från hermeneutiken användes för att utföra studien tillsammans med semistrukturerade intervjuer med ett antal respondenter från en SiS-institution. von Wrights (2000) relationella och punktuella perspektiv användes som teoretisk utgångspunkt till studien. Resultatet redovisar att respondenterna uppfattade, upplevde och erfarar att ungdomarna som placeras vid institutionen minst någon gång under vistelsen uppvisar ett aggressivt beteende. Det kan även ses i resultatet att personalen upplever att dessa ungdomar i de flesta fall har många av de faktorer som orsakar ett aggressivt beteende med sig till institutionen från deras bakgrund och familjesituation.

  • 4949.
    Abedin, Raeed Ibnul
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Hossain, Syed Sajjad
    Halmstad University, School of Business, Engineering and Science.
    Ecosystem Approach in Value Creation: A Case Study of HMS2019Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Purpose: This thesis paper aims to understand how companies in the industrial automation sector can create value for the emerging technology ecosystem. 

    Design/methodology/approach: A single case study approach was taken to write this thesis, the case study was based on HMS Industrial Networks AB. Primary data were collected through in-depth interviews, various personnel from HMS were interviewed which facilitated to create the case study. Secondary data were also collected mainly from industry reports and other publicly available reports. To perform the analysis relevant literature were discussed in the literature review section.  

    Results: The study revealed that to create value in industrial automation sector companies need to evaluate their existing role in the ecosystem and adjust the role based on their industry competence and partnership capability with other platform participants. Through collaboration with the right partners, companies can create value for different stakeholders in the ecosystem. For HMS, we have suggested the role of ecosystem orchestrator, the conclusion was made based on their existing ecosystem role, extensive industry competencies, and high partnership capability.   

    Originality/value: Previously academic research has not been done on this topic as per the knowledge of the authors. This thesis paper can be useful for academics to do further research on different industries facing issues related to value creation and professionals can apply the suggested practical implications in their industry.  

  • 4950.
    Abedin, Reaz Ashraful
    Umeå University, Faculty of Science and Technology, Department of Computing Science.
    Autonomous Object Category Learning for Service Robots Using Internet Resources2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    With the developments in the field of Artificial Intelligence (AI), robots are becoming smarter, more efficient and capable of doing more dififcult tasks than before. Recent progress in Machine Learning has revolutionized the field of AI. Rather than performing pre-programmed tasks, nowadays robots are learning things, and becoming more autonomous along the way. However, in most of the cases, robots need a certain level of human assistance to learn something. To recognize or classify daily objects is a very important skill that a service robot should possess. In this research work, we have implemented a fully autonomous object category learning system for service robots, where the robot uses internet resources to learn object categories. It gets the name of an unknown object by performing reverse image search in the internet search engines, and applying a verification strategy afterwards. Then the robot retrieves a number of images of that object from internet and use those to generate training data for learning classifiers. The implemented system is tested in actual domestic environment. The classification performance is examined against some object categories from a benchmark dataset. The system performed decently with 78:40% average accuracy on ve object categories taken from the benchmark dataset and showed promising results in real domestic scenarios. There are existing research works that deal with object category learning for robots using internet images. But those works use Human-in-the-loop models, where humans assist the robot to get the object name for using it as a search cue to retrieve training images from internet. Our implemented system eliminates the necessity of human assistance by making the task of object name determination automatic. This facilitates the whole process of learning object categories with full autonomy, which is the main contribution of this research.

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