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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 41 to 49 of 49 (0.11 seconds)| 41 |
Det kan vara godtagbart, bättre än ingenting : En kvalitativ studie av behandlares upplevelse av att bedriva KBT-baserade program med hjälp av videosamtal / It Can Be Acceptable, Better than Nothing : A Qualitative Study of Therapists Experiences of Carrying Cbt Based Programming Using Video CallsLarsson, Karolin January 2022 (has links)
I och med covid-19-pandemin som startade 2020 har fler kontakter mellan människor flyttats online för att minska smittspridningen, så även det sociala arbetet. Syftet med denna studie var att ta reda på hur personal som arbetar med behandlingsprogram inom Frivården har upplevt att det har varit att genomföra behandlingsprogram via videosamtal. Frivården började med detta arbetssätt i samband med covid-19-restriktionerna 2020 och då fenomenet är nytt i Sverige finns inte mycket tidigare nationell forskning kring detta. Studien bygger på kvalitativa intervjuer med behandlingspersonal på fyra frivårdskontor i Sverige och vill skapa en bild av deras upplevelse. Av intervjuerna framgick att personalen upplever problem med det tekniska genomförandet och i samarbetet med klienterna. Man anser dock att det fungerat bättre än förväntat. Problemen kring genomförandet förklarats i detta examensarbete med hjälp av mottaglighetsprincipen och tankar kring kollaborativ empirism. Det har framgått att genomförandet till stor del påverkas av klienternas mottaglighet och att denna i sin tur påverkar möjligheten till kollaborativ empirism i arbetet med behandling. / With the start of the covid-19 pandemic 2020, more contacts between people have been moved online to reduce the spread of infection, as has social work. The purpose of this study was to find out how staff who work with treatment programs within the Swedish probation service have experienced that it has been to implement treatment programs via video calls. The probation service began with this approach in connection with the covid-19 restrictions in 2020 and since the phenomenon is new in Sweden, there is not much previous national research on this. The study is based on qualitative interviews with treatment staff at four probation offices in Sweden and wants to create a picture of their experience. The interviews showed that the staff experience problems with the technical implementation and in the collaboration with the clients. However, it is believed that it worked better than expected. The problems with implementation have been explained in this thesis with the help of the principle of responsivity and thoughts about collaborative empiricism. It has been shown that the implementation is largely affected by the clients' responsivity and that this in turn affects the possibility of collaborative empiricism in the work with treatment.
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Digital undervisning och inlärningsutmaningar under en pandemi : En fallstudie på ett svenskt universitet / Digital education and learning challanges during a pandemic : A case study on a Swedish universityLidström, Hugo, Bravo Ossandon, Matias January 2021 (has links)
Digital undervisning blev under covid-19 pandemin en viktig metod för att kunna upprätthålla lärande för utbildningsinstitutioner. Genom att använda sig av digitala plattformar och verktyg som exempelvis Learning Management Systems (LMS) och Videokonferens verktyg (VKV) kan studenter lära sig utan att fysiskt vara närvarande. Den tidigare forskningen har tagit upp de sociala och fysiska problemen som kan uppstå vid ett oönskat miljöombyte. Vidare har det lyfts fram att individer har olika förutsättningar vid distansutbildning vilket kan påverka lärandet under hela utbildningen. Det lyfts även fram styrkor och svagheter med distansundervisning men inget som specifikt berör hur de digitala plattformarna har påverkat studenters motivation, koncentration och studieteknik under covid-19. Syftet med studien var att undersöka hur studenter vid Linneuniversitetet upplever att de har påverkats av den ofrivilliga distansundervisningen covid-19 medför och de digitala lärplattformar och verktyg som används. En kvalitativ ansats med semistrukturerade intervjuer har varit studiens metod vid datainsamling. Studien har förhållit sig till fem informanter som studerat på olika program inom Linneuniversitetet. För att analysera data följdes Creswells sex steg för dataanalys vilket resulterade i två huvudområden som inkluderade fyra teman och tre subteman. Studien kom fram till att studenter upplever att det finns möjligheter till sociala interaktioner med VKV. Flexibiliteten och möjligheten att vara platsoberoende är väldigt positivt för studenter. Studien har konstaterat att studenters koncentration, motivation och studieteknik har påverkats negativt sedan införandet av VKV föreläsningar. Vid användning av LMS så har upplevelsen varit att det finns en minimal påverkan på centrala faktorerna för lärande. / During the covid-19 pandemic, digital education became an important method for maintaining learning for educational institutions. By using digital platforms and tools such as Learning Management Systems (LMS) and Video Conferencing tools (VKV), students can learn without being physically present. Previous research has addressed the social and physical problems that can arise in the event of an unwanted environmental change. Furthermore, it has been emphasized that individuals have different conditions for distance education, which can affect learning throughout the education. It also highlights the strengths and weaknesses of distance education, but nothing that specifically affects how the digital platforms have affected students' motivation, concentration and study techniques during covid-19. The purpose of this study was to investigate how students at Linnaeus University feel that they have been affected by the involuntary distance education that covid-19 entails and the digital learning platforms and tools used. A qualitative approach with semi-structured interviews has been the study's method of data collection. The study involved five informants who studied in various programs within Linnaeus University. Creswell’s six steps for data analysis was chosen to analyze the data which resulted in two main areas that included four themes and three subthemes. The study concluded that students feel that there are opportunities for social interactions with VKV. The flexibility and the opportunity to be site-independent is very positive for students. The study has found that students' concentration, motivation and study techniques have been negatively affected since the introduction of VKV lectures. When using LMS, the experience has been that there is a minimal impact on the key factors for learning.
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Deep Learning Approaches to Bed-Exit Monitoring of Patients, Factory Inspection, and 3D ReconstructionFan Bu (14102490) 11 November 2022 (has links)
<p>In this dissertation, we dedicate ourselves to applying deep-learning-based computer vision algorithms to industrial applications in 2D and 3D image processing. More specifically, we present the application of deep-learning-based image processing algorithms to the following three topics: RGB-image-based shipping box defect detection, RGB-image-based patients' bed-side status monitoring, and an RGBD-image-based 3D surface video conferencing system. These projects cover 2D image detection of static objects in industrial scenarios, 2D detection of dynamic human images in bedroom environments, and accurate 3D reconstruction of dynamic humanoid objects in video conferencing. In each of these projects, we proposed ready-to-deploy pipelines combining deep learning and traditional computer vision algorithms to improve the overall performance of industrial products. In each chapter, we describe in detail how we utilize, modify, and enhance the architecture of convolutional neural networks, including the training techniques using data acquisition, image annotation, synthetic datasets, and other schemes. In the relevant sections, we also present how post-processing steps with image processing algorithms can improve the overall effectiveness of the algorithm. We hope that our work demonstrates the versatility and advantages of deep neural networks in both 2D and 3D computer vision applications.</p>
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Providing quality of service for realtime traffic in heterogeneous wireless infrastructure networksTeh, Anselm January 2009 (has links)
In recent years, there has been a rapid growth in deployment and usage of realtime network applications, such as Voice-over-IP, video calls/video conferencing, live network seminars, and networked gaming. The continued increase in the popularity of realtime applications requires a more intense focus on the provision of strict guarantees for Quality of Service (QoS) parameters such as delay, jitter and packet loss in access networks. At the same time, wireless networking technologies have become increasingly popular with a wide array of devices such as laptop computers, Personal Digital Assistants (PDAs), and cellular phones being sold with built-in WiFi and WiMAX interfaces. For realtime applications to be popular over wireless networks, simple, robust and effective QoS mechanisms suited for a variety of heterogeneous wireless networks must be devised. Implementing the same QoS mechanisms across multiple neighbouring networks aids seamless handover by ensuring that a flow will be treated in the same way, both before and after handover. To provide guaranteed QoS, an access network should limit load using an admission control algorithm. In this research, we propose a method to provide effective admission control for variable bit rate realtime flows, based on the Central Limit Theorem. Our objective is to estimate the percentage of packets that will be delayed beyond a predefined delay threshold, based on the mean and variance of all the flows in the system. Any flow that will increase the percentage of delayed packets beyond an acceptable threshold can then be rejected. Using simulations we have shown that the proposed method provides a very effective control of the total system load, guaranteeing the QoS for a set of accepted flows with negligible reductions in the system throughput. To ensure that flow data is transmitted according to the QoS requirements of a flow, a scheduling algorithm must handle data intelligently. We propose methods to allow more efficient scheduling by utilising existing Medium Access Control mechanisms to exchange flow information. We also propose a method to determine the delay-dependent "value" of a packet based on the QoS requirements of the flow. Using this value in scheduling is shown to increase the number of packets sent before a predetermined deadline. We propose a measure of fairness in scheduling that is calculated according to how well each flow's QoS requirements are met. We then introduce a novel scheduling paradigm, Delay Loss Controlled-Earliest Deadline First (DLC-EDF), which is shown to provide better QoS for all flows compared to other scheduling mechanisms studied. We then study the performance of our admission control and scheduling methods working together, and propose a feedback mechanism that allows the admission control threshold to be tuned to maximise the efficient usage of available bandwidth in the network, while ensuring that the QoS requirements of all realtime flows are met. We also examine heterogeneous/vertical handover, providing an overview of the technologies supporting seamless handover. The issues studied in this area include a method of using the Signal to Noise Ratio to trigger handover in heterogeneous networks and QoS Mapping between heterogeneous networks. Our proposed method of QoS mapping establishes the minimum set of QoS parameters applicable to individual flows, and then maps these parameters into system parameter formats for both 802.11e and 802.16e networks.
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DESIGN OF CROWD-SCALE MULTI-PARTY TELEPRESENCE SYSTEM WITH DISTRIBUTED MULTIPOINT CONTROL UNIT BASED ON PEER TO PEER NETWORKHossain, Md Amjad 02 December 2020 (has links)
No description available.
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Building the ARC in Nursing Education: Cross-Cultural Experiential Learning Enabled by the Technology of Video or Web ConferencingSpalla, Tara Lynn 18 December 2012 (has links)
No description available.
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Use of Coherent Point Drift in computer vision applicationsSaravi, Sara January 2013 (has links)
This thesis presents the novel use of Coherent Point Drift in improving the robustness of a number of computer vision applications. CPD approach includes two methods for registering two images - rigid and non-rigid point set approaches which are based on the transformation model used. The key characteristic of a rigid transformation is that the distance between points is preserved, which means it can be used in the presence of translation, rotation, and scaling. Non-rigid transformations - or affine transforms - provide the opportunity of registering under non-uniform scaling and skew. The idea is to move one point set coherently to align with the second point set. The CPD method finds both the non-rigid transformation and the correspondence distance between two point sets at the same time without having to use a-priori declaration of the transformation model used. The first part of this thesis is focused on speaker identification in video conferencing. A real-time, audio-coupled video based approach is presented, which focuses more on the video analysis side, rather than the audio analysis that is known to be prone to errors. CPD is effectively utilised for lip movement detection and a temporal face detection approach is used to minimise false positives if face detection algorithm fails to perform. The second part of the thesis is focused on multi-exposure and multi-focus image fusion with compensation for camera shake. Scale Invariant Feature Transforms (SIFT) are first used to detect keypoints in images being fused. Subsequently this point set is reduced to remove outliers, using RANSAC (RANdom Sample Consensus) and finally the point sets are registered using CPD with non-rigid transformations. The registered images are then fused with a Contourlet based image fusion algorithm that makes use of a novel alpha blending and filtering technique to minimise artefacts. The thesis evaluates the performance of the algorithm in comparison to a number of state-of-the-art approaches, including the key commercial products available in the market at present, showing significantly improved subjective quality in the fused images. The final part of the thesis presents a novel approach to Vehicle Make & Model Recognition in CCTV video footage. CPD is used to effectively remove skew of vehicles detected as CCTV cameras are not specifically configured for the VMMR task and may capture vehicles at different approaching angles. A LESH (Local Energy Shape Histogram) feature based approach is used for vehicle make and model recognition with the novelty that temporal processing is used to improve reliability. A number of further algorithms are used to maximise the reliability of the final outcome. Experimental results are provided to prove that the proposed system demonstrates an accuracy in excess of 95% when tested on real CCTV footage with no prior camera calibration.
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Augmented Reality for Immersive Video Conference Presentations : Enhancing Video Presentation Experiences with Visual Aid Through Augmented Reality / Förstärkt verklighet för immersiva videopresentationer : Förbättrade videopresentationer med hjälp av visuella hjälpmedel i förstärkt verklighetRosenberg, Gabriel January 2023 (has links)
As 3D models are increasingly used in a variety of contexts, both for entertainment in games and movies, as well as professional visualization and CAD models, there is an increased demand for collaborative tools which can be used to show these virtual artifacts efficiently. Interaction with digital 3D artifacts has long since been enabled through the use of specialized software, like CAD modeling applications and 3D rendering software; which often are extensive and require time to master and use efficiently. This thesis investigates how natural interaction through augmented reality can be used to interact with 3D artifacts in video conferencing scenarios and how it could enrich presentation experiences. Different approaches were evaluated to enable natural interactions before creating a prototype solution. Research was carried out with a design approach by creating a prototype solution, which was evaluated in a user study with a mixed research method. Data were collected through a semistructured interview as well as quantitative methods, which consisted of the NASA Task Load Index and a performance evaluation form filled out by the participants. The interview data were processed with a reflexive thematic analysis, and insight was gained as important themes emerged from the data. The results indicate an increased physical demand, but also less frustration with the prototype solution compared to screen sharing of Windows 3D Viewer. The responses of the study participants highlight key factors to consider in future development. / Eftersom 3D-modeller i allt högre grad används i en mängd olika sammanhang, både för underhållning i spel och filmer samt för professionell visualisering, finns det en ökad efterfrågan på samarbetsverktyg som kan användas för att visa dessa virtuella artefakter effektivt. Interaktion med digitala 3D-modeller har för länge sedan möjliggjorts genom användning av specialiserad programvara, som CAD-modelleringsapplikationer och 3D-renderingsprogram; som ofta är omfattande och kräver tid att bemästra och använda effektivt. Denna avhandling undersöker hur naturlig interaktion genom förstärkt verklighet kan användas för att interagera med 3D-artefakter i videokonferensscenarier och hur det kan berika presentationsupplevelser. Ämnet undersöktes genom att skapa en prototyplösning, som utvärderades i en användarstudie med en blandad forskningsmetod. Data samlades in genom en semistrukturerad intervju samt kvantitativa metoder, som bestod av NASA Task Load Index och ett prestationsutvärderingsformulär som fyllts i av deltagarna. Intervjudata bearbetades med en reflexiv tematisk analys, och insikt framkom genom att studera datan. Resultaten indikerar en ökad fysisk ansträngning, men också mindre frustration med prototyplösningen jämfört med skärmdelning av Windows 3D Viewer. Svaren från studiedeltagarna belyser nyckelfaktorer att ta hänsyn till i framtida utveckling.
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Las nuevas tecnologías en la administración de justicia. La validez y eficacia del documento electrónico en sede procesalJaume Bennasar, Andrés 09 October 2009 (has links)
La tesis se encarga de analizar, por un lado, la integración y el desarrollo de las nuevas tecnologías en la Administración de Justicia; y, por otro, los parámetros que constituyen la validez y eficacia del documento electrónico. La primera cuestión se centra en la configuración de los Sistemas de Información de la Oficina Judicial y del Ministerio Fiscal, así como de la informatización de los Registros Civiles, donde el art. 230 LOPJ es la pieza clave. Se estudian sus programas, aplicaciones, la videoconferencia, los ficheros judiciales y las redes de telecomunicaciones que poseen la cobertura de la firma electrónica reconocida, donde cobran gran relevancia los convenios de colaboración tecnológica. La digitalización de las vistas quizá sea una de las cuestiones con más trascendencia, teniendo en cuenta que el juicio es el acto que culmina el proceso. Aunque no todos los proyectos adoptados en el ámbito de la e.justicia se han desarrollado de forma integral, ni han llegado a la totalidad de los órganos judiciales. El objetivo final es lograr una Justicia más ágil y de calidad, a lo cual aspira el Plan Estratégico de Modernización de la Justicia 2009-2012 aprobado recientemente.En referencia a la segunda perspectiva, no cabe duda que el Ordenamiento jurídico y los tribunales, en el ámbito de la justicia material, otorgan plena validez y eficacia al documento electrónico. Nuestra línea de investigación se justifica porque cada vez son más los procesos que incorporan soportes electrónicos de todo tipo, ya sea al plantearse la acción o posteriormente como medio de prueba (art. 299.2 LEC). Entre otros temas examinamos el documento informático, la problemática que rodea al fax, los sistemas de videograbación y el contrato electrónico. / La tesi s'encarrega d'analitzar, per una part, la integració i el desenvolupament de les noves tecnologies dins l´Administració de Justícia; i, per l'altra, els paràmetres que constitueixen la validesa i l'eficàcia del document electrònic. La primera qüestió es centra en la configuració dels Sistemes d´Informació de l´Oficina Judicial i del Ministeri Fiscal, així com de la informatització dels Registres Civils, on l'art. 230 LOPJ es la peça clau. S'estudien els seus programes, aplicacions, la videoconferència, el fitxers judicials i les xarxes de telecomunicacions que tenen la cobertura de la firma electrònica reconeguda, on cobren gran rellevància els convenis de col·laboració tecnològica. La digitalització de les vistes tal vegada sigui una de les qüestions amb més transcendència, tenint amb compte que el judici es l'acte que culmina el procés. Però no tots el projectes adoptats en l'àmbit de la e.justicia s'han desenvolupat d'una manera integral ni han arribat a la totalitat dels òrgans judicials. L'objectiu final es assolir una Justícia més àgil i de qualitat, al que aspira el Pla Estratègic de Modernització de la Justícia 2009-2012 aprovat recentment. En referència a la segona perspectiva, no hi ha dubte que l´Ordenament jurídic i els tribunals, en l'àmbit de la justícia material, donen plena validesa i eficàcia al document electrònic. La nostra línia d'investigació es justifica perquè cada vegada son més el processos que incorporen suports electrònics de tot tipus, ja sigui quant es planteja l'acció o posteriorment como a medi de prova (art. 299.2 LEC). Entre altres temes examinem el document informàtic, la problemàtica que envolta al fax, els sistemes de videogravació i el contracte electrònic. / The thesis seeks to analyse, on the one hand, the integration and development of the new technologies in the Administration of Justice; and, on the other, the parameters which constitute the validity and efficiency of the electronic document.The first question centres on the configuration of the Information Systems of the Judicial Office and the Public Prosecutor, as well as the computerisation of the Civil Registers, where the art. 230 LOPJ it's the part key. Their programmes, applications, the Video Conferencing, the judicial registers and the telecommunication networks which are covered by the recognised electronic signatures, are studied, where the agreements on technological collaboration gain great relevance. The digitalisation of evidence might perhaps be one of the questions with most consequence, bearing in mind that the judgment is the act by which the process is culminated. Although not all the projects adopted within the compass of e.justice have developed completely nor have reached all the judicial organs. The final objective is to achieve an agile, quality Justice, to which the recently approved Strategic Plan for the Modernisation of Justice aspires.With reference to the second perspective, there is no doubt that the juridical Ordinance and the tribunals within the compass of material justice grant full validity and efficacy to the electronic document. Our line of investigation is justified because there are more and more processes which are sustained by electronic supports of all kinds, whether it be at the establishment of the action or later, as a proof of it (art. 299.2 LEC). Amongst other things, we examine the computerised document, the problems which surround the fax, the systems for video recording and the electronic contract.
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