Global ETD Search

801	A Physically Based Pipeline for Real-Time Simulation and Rendering of Realistic Fire and Smoke / En fysiskt baserad rörledning för realtidssimulering och rendering av realistisk eld och rök He, Yiyang January 2018 (has links) With the rapidly growing computational power of modern computers, physically based rendering has found its way into real world applications. Real-time simulations and renderings of fire and smoke had become one major research interest in modern video game industry, and will continue being one important research direction in computer graphics. To visually recreate realistic dynamic fire and smoke is a complicated problem. Furthermore, to solve the problem requires knowledge from various areas, ranged from computer graphics and image processing to computational physics and chemistry. Even though most of the areas are well-studied separately, when combined, new challenges will emerge. This thesis focuses on three aspects of the problem, dynamic, real-time and realism, to propose a solution in form of a GPGPU pipeline, along with its implementation. Three main areas with application in the problem are discussed in detail: fluid simulation, volumetric radiance estimation and volumetric rendering. The weights are laid upon the first two areas. The results are evaluated around the three aspects, with graphical demonstrations and performance measurements. Uniform grids are used with Finite Difference (FD) discretization scheme to simplify the computation. FD schemes are easy to implement in parallel, especially with ComputeShader, which is well supported in Unity engine. The whole implementation can easily be integrated into any real-world applications in Unity or other game engines that support DirectX 11 or higher. Visualization Physically Based Pipeline Real-Time Dynamic Simulation Combustion Fire Explosion Smoke Thick Smoke Computer Graphics PDE Numerical Methods Grid Based Navier-Stokes Equation Imcompressible Fluid Radiative Transfer Equation RTE Volumetric Illumination Volumetric Rendering Volumetric Global Illumination Distant Light Source Volumetric Global Shadow Local Shadow Approximation Black-body Radiation Poisson Solver Spectroscopy Fire Color Color Reproduction Tone Mapping Color Temperature Color Matching Function Tristimulus CIE Standard Observer Color Space XYZ RGB GPU GPGPU ComputeShader DirectX 12 Unity C# Computer Sciences Datavetenskap (datalogi)
802	Řešení dopravy v centru Havlíčkova Brodu / Traffic situation in the city centre of Havlíčkův Brod and its solution Tobek, Miroslav January 2013 (has links) The aim of this diploma thesis is the solution of the traffic situation in the city center of Havlíčkův Brod. Mainly the ground road number II/150 adjustment, which consist in the modification of the two-way traffic to one-way traffic organization in the streets Dolní, Žižkova and Na Ostrově by using the analogy of a roundabout layout, is solved within this thesis. All mentioned modifications simplify the traffic situation, improve the orientation and increase the security and the traffic flow mainly in relation to pedestrians and cyclists. Another part of this thesis is focused on revitalization of the public spaces in front of the community center called Ostrov and junction of existing cycle tracks situated on the both banks of the Sázava river. In relation to this topic the adjustment of rainwater sewerage system, low-voltage above ground network, public lighting, communication electric cables, fire brigade signal lights and low-pressure gas pipeline is also solved.
803	A deep learning based anomaly detection pipeline for battery fleets Khongbantabam, Nabakumar Singh January 2021 (has links) This thesis proposes a deep learning anomaly detection pipeline to detect possible anomalies during the operation of a fleet of batteries and presents its development and evaluation. The pipeline employs sensors that connect to each battery in the fleet to remotely collect real-time measurements of their operating characteristics, such as voltage, current, and temperature. The deep learning based time-series anomaly detection model was developed using Variational Autoencoder (VAE) architecture that utilizes either Long Short-Term Memory (LSTM) or, its cousin, Gated Recurrent Unit (GRU) as the encoder and the decoder networks (LSTMVAE and GRUVAE). Both variants were evaluated against three well-known conventional anomaly detection algorithms Isolation Nearest Neighbour (iNNE), Isolation Forest (iForest), and kth Nearest Neighbour (k-NN) algorithms. All five models were trained using two variations in the training dataset (full-year dataset and partial recent dataset), producing a total of 10 different model variants. The models were trained using the unsupervised method and the results were evaluated using a test dataset consisting of a few known anomaly days in the past operation of the customer’s battery fleet. The results demonstrated that k-NN and GRUVAE performed close to each other, outperforming the rest of the models with a notable margin. LSTMVAE and iForest performed moderately, while the iNNE and iForest variant trained with the full dataset, performed the worst in the evaluation. A general observation also reveals that limiting the training dataset to only a recent period produces better results nearly consistently across all models. / Detta examensarbete föreslår en pipeline för djupinlärning av avvikelser för att upptäcka möjliga anomalier under driften av en flotta av batterier och presenterar dess utveckling och utvärdering. Rörledningen använder sensorer som ansluter till varje batteri i flottan för att på distans samla in realtidsmätningar av deras driftsegenskaper, såsom spänning, ström och temperatur. Den djupinlärningsbaserade tidsserieanomalidetekteringsmodellen utvecklades med VAE-arkitektur som använder antingen LSTM eller, dess kusin, GRU som kodare och avkodarnätverk (LSTMVAE och GRU) VAE). Båda varianterna utvärderades mot tre välkända konventionella anomalidetekteringsalgoritmer -iNNE, iForest och k-NN algoritmer. Alla fem modellerna tränades med hjälp av två varianter av träningsdatauppsättningen (helårsdatauppsättning och delvis färsk datauppsättning), vilket producerade totalt 10 olika modellvarianter. Modellerna tränades med den oövervakade metoden och resultaten utvärderades med hjälp av en testdatauppsättning bestående av några kända anomalidagar under tidigare drift av kundens batteriflotta. Resultaten visade att k-NN och GRUVAE presterade nära varandra och överträffade resten av modellerna med en anmärkningsvärd marginal. LSTMVAE och iForest presterade måttligt, medan varianten iNNE och iForest tränade med hela datasetet presterade sämst i utvärderingen. En allmän observation avslöjar också att en begränsning av träningsdatauppsättningen till endast en ny period ger bättre resultat nästan konsekvent över alla modeller. Forklift batteries Battery sensors Data pipeline Predictive maintenance Anomaly detection Deep learning Battery failure prediction Time-series Variational autoencoder Long short-term memory LSTM Gated recurrent unit GRU Isolation nearest neighbor iNNE Isolation forest iForest kth nearest neighbor kNN. Gaffeltruckbatterier Batterisensorer Datapipeline Prediktivt underhåll Avvikelsedetektering Deep learning Batterifelsprediktion Tidsserier Variationsautokodare Långt korttidsminne LSTM Gated recurrent unit GRU Isolation närmaste granne iNNE Isolation skog iForest kth närmaste granne kNN. Computer and Information Sciences Data- och informationsvetenskap
804	Stavebně technologický projekt tepelného napaječe v Jižních Čechách / Construction Technological Project of a Heat Feeder in South Bohemia Handlíř, Jan Unknown Date (has links) The subject of the diploma thesis is a technological construction project of heat feeder on the hot water pipeline between České Budějovice and nuclear power plant Temelín. The main object is an industrial hall made of steel and brick administrative part. The hall is a steel structure clad with sandwich panels. The administrative part is single-storey building from bricks and has a flat roof. The construction also includes an access road with car park.
805	Návrh AD převodníku pro senzorové aplikace / Design of an AD converter for sensor applications Bečková, Zuzana January 2016 (has links) Diplomová práce obsahuje stručný teoretický základ pro designéra/ku A/D převodníku v technologii CMOS a přehled architektur A/D převodníků používaných v automobilovém průmyslu. Volba vhodné architektury pro konkrétní aplikaci byla zásadním úkolem zpra- covaným v semestrálním projektu předcházejícím tuto práci a je rovněž součástí této práce. Analýza v Matlabu, ze které by mělo vyplynout, je-li třeba zahrnout do architek- tury podblok Sample and Hold, je také součástí práce. Klíčovou částí práce je dokumen- tace návrhu jednotlivých podbloků A/D převodníku – operačního zesilovače, kompará- toru a R-2R D/A převodníku – a ověření jejich funkčnosti. V závěru práce je ověřena funkčnost A/D převodníku jako celku.
806	Demography of Birch Populations across Scandinavia Sendrowski, Janek January 2022 (has links) Boreal forests are particularly vulnerable to climate change, experiencing a much more drastic increase in temperatures and having a limited amount of more northern refugia. The trees making up these vast and important ecosystems already had to adapt previously to environmental pressures brought about by the repeated glaciations during past ice ages. Studying the patterns of adaption of these trees can thus provide valuable insights on how to mitigate future damage. This thesis presents and analyses population structure, demo- graphic history and the distribution of fitness effects (DFE) of the diploid Betula pendula and tetraploid B. pubescens across Scandinavia. Birches–being widespread in boreal forests as well as having great economical importance–constitute superb model species. The analyses of this work confirm the expectations on postglacial population expansion and diploid-tetraploid introgression. They furthermore ascertain the presence of two genetic clusters and a remarkably similar DFE for the species. This work also contributes with a transparent, reproducible and reusable pipeline which facilitates running similar analyses for related species. birch betula pubescens pendula betula pubescens betula pendula silver birch downy birch demography population structure distribution of fitness effects DFE dadi UMAP PCA ADMIXTURE polyDFE ice age glaciation tree boreal forest climate change adaption tetraploid diploid-tetraploid introgression Scandinavia genetic cluster pipeline snakemake bioinformatics reproducible population genetics postglacial population expansion demographic history FEEMS site-frequency spectrum SFS last glacial maximum LGM workflow python population expansion population growth EST-SFS 0-fold degenerate 4-fold degenerate maximum likelihood estimation MLE variant call format VCF single-nucleotide polymorphism SNP Bioinformatics (Computational Biology) Bioinformatik (beräkningsbiologi)
807	Introducing Generative Artificial Intelligence in Tech Organizations : Developing and Evaluating a Proof of Concept for Data Management powered by a Retrieval Augmented Generation Model in a Large Language Model for Small and Medium-sized Enterprises in Tech / Introducering av Generativ Artificiell Intelligens i Tech Organisationer : Utveckling och utvärdering av ett Proof of Concept för datahantering förstärkt av en Retrieval Augmented Generation Model tillsammans med en Large Language Model för små och medelstora företag inom Tech Lithman, Harald, Nilsson, Anders January 2024 (has links) In recent years, generative AI has made significant strides, likely leaving an irreversible mark on contemporary society. The launch of OpenAI's ChatGPT 3.5 in 2022 manifested the greatness of the innovative technology, highlighting its performance and accessibility. This has led to a demand for implementation solutions across various industries and companies eager to leverage these new opportunities generative AI brings. This thesis explores the common operational challenges faced by a small-scale Tech Enterprise and, with these challenges identified, examines the opportunities that contemporary generative AI solutions may offer. Furthermore, the thesis investigates what type of generative technology is suitable for adoption and how it can be implemented responsibly and sustainably. The authors approach this topic through 14 interviews involving several AI researchers and the employees and executives of a small-scale Tech Enterprise, which served as a case company, combined with a literature review. The information was processed using multiple inductive thematic analyses to establish a solid foundation for the investigation, which led to the development of a Proof of Concept. The findings and conclusions of the authors emphasize the high relevance of having a clear purpose for the implementation of generative technology. Moreover, the authors predict that a sustainable and responsible implementation can create the conditions necessary for the specified small-scale company to grow. When the authors investigated potential operational challenges at the case company it was made clear that the most significant issue arose from unstructured and partially absent documentation. The conclusion reached by the authors is that a data management system powered by a Retrieval model in a LLM presents a potential path forward for significant value creation, as this solution enables data retrieval functionality from unstructured project data and also mitigates a major inherent issue with the technology, namely, hallucinations. Furthermore, in terms of implementation circumstances, both empirical and theoretical findings suggest that responsible use of generative technology requires training; hence, the authors have developed an educational framework named "KLART". Moving forward, the authors describe that sustainable implementation necessitates transparent systems, as this increases understanding, which in turn affects trust and secure use. The findings also indicate that sustainability is strongly linked to the user-friendliness of the AI service, leading the authors to emphasize the importance of HCD while developing and maintaining AI services. Finally, the authors argue for the value of automation, as it allows for continuous data and system updates that potentially can reduce maintenance. In summary, this thesis aims to contribute to an understanding of how small-scale Tech Enterprises can implement generative AI technology sustainably to enhance their competitive edge through innovation and data-driven decision-making. UX HCD HCI AI Artificial Intelligence Generative AI Implementing AI LLM GPT RAG Chatbot Prompt engineering Prompting framework Hallucinations Transparency Interaction Technologies Usability Linguistics Innovation SME Tech Enterprise Qte Growth factors Documentation Communication Knowledge retention Competence development Education Training Retrieval Model Data Data Management Database Knowledge base Maintenance Data security Data driven decision making Data analytics Social sustainability Economical sustainability Figma Trello Github OpenAI GTPs VsCode Azure CoPilot Google Bard Zapier GCS API Pipeline Parsing data Sorting data Storing data Human Computer Interaction Interaction Technologies Interaktionsteknik
808	Calcul flottant haute performance sur circuits reconfigurables / High-performance floating-point computing on reconfigurable circuits Pasca, Bogdan Mihai 21 September 2011 (has links) De plus en plus de constructeurs proposent des accélérateurs de calculs à base de circuits reconfigurables FPGA, cette technologie présentant bien plus de souplesse que le microprocesseur. Valoriser cette flexibilité dans le domaine de l'accélération de calcul flottant en utilisant les langages de description de circuits classiques (VHDL ou Verilog) reste toutefois très difficile, voire impossible parfois. Cette thèse a contribué au développement du logiciel FloPoCo, qui offre aux utilisateurs familiers avec VHDL un cadre C++ de description d'opérateurs arithmétiques génériques adapté au calcul reconfigurable. Ce cadre distingue explicitement la fonctionnalité combinatoire d'un opérateur, et la problématique de son pipeline pour une précision, une fréquence et un FPGA cible donnés. Afin de pouvoir utiliser FloPoCo pour concevoir des opérateurs haute performance en virgule flottante, il a fallu d'abord concevoir des blocs de bases optimisés. Nous avons d'abord développé des additionneurs pipelinés autour des lignes de propagation de retenue rapides, puis, à l'aide de techniques de pavages, nous avons conçu de gros multiplieurs, possiblement tronqués, utilisant des petits multiplieurs. L'évaluation de fonctions élémentaires en flottant implique souvent l'évaluation en virgule fixe d'une fonction. Nous présentons un opérateur générique de FloPoCo qui prend en entrée l'expression de la fonction à évaluer, avec ses précisions d'entrée et de sortie, et construit un évaluateur polynomial optimisé de cette fonction. Ce bloc de base a permis de développer des opérateurs en virgule flottante pour la racine carrée et l'exponentielle qui améliorent considérablement l'état de l'art. Nous avons aussi travaillé sur des techniques de compilation avancée pour adapter l'exécution d'un code C aux pipelines flexibles de nos opérateurs. FloPoCo a pu ainsi être utilisé pour implanter sur FPGA des applications complètes. / Due to their potential performance and unmatched flexibility, FPGA-based accelerators are part of more and more high-performance computing systems. However, exploiting this flexibility for accelerating floating-point computations by manually using classical circuit description languages (VHDL or Verilog) is very difficult, and sometimes impossible. This thesis has contributed to the development of the FloPoCo software, a C++ framework for describing flexible FPGA-specific arithmetic operators. This framework explicitly separates the description of the combinatorial functionality of an arithmetic operator, and its pipelining for a given precision, operating frequency and target FPGA.In order to be able to use FloPoCo for designing high performance floating-point operators, we first had to design the optimized basic blocks. We first developed pipelined addition architectures exploiting the fast-carry lines present in modern FPGAs. Next, we focused on multiplication architectures. Using tiling techniques, we proposed novel architectures for large multipliers, but also truncated multipliers, based on the multipliers found in modern FPGA DSP blocks. We also present a generic FloPoCo operator which inputs the expression of a function, its input and output precisions, and builds an optimized polynomial evaluator for the fixed-point evaluation of this function. Using this building block we have designed floating-point operators for the square-root and exponential functions which significantly outperform existing operators. Finally, we also made use of advanced compilation techniques for adapting the execution of a C program to the flexible pipelines of our operators. FPGA Virgule flottante FloPoCo Chemin de données arithmétique Pipeline pour une fréquence donnée Addition pipelinée Additionneur rapide Multiplication Karatsuba-Offman Carré Multiplieur tronqué Multiplication par pavage Virgule fixe Approximation polynomiale Racine carrée flottante Exponentielle flottante Accumulation flottante Schéma d'évaluation de Horner Somme de carrés flottante Synthèse de haut niveau Nid de boucles parfait Multiplication de matrices Jacobi Dilemme du fabricant de table Méthode des différences tabulées Communications pipelinées FPGA Floating-point FloPoCo Arithmetic datapath Frequency-driven pipelining Pipelined addition Short-latency adder Multiplication Karatsuba-Offman Squarer Truncated multiplier Multiplication tiling Fixed-point Polynomial approximation Floating-point square root Floating-point exponential Floating-point accumulation Horner datapath Floating-point sum-of-products High-level synthesis Perfect loop nests Matrix-matrix multiply Jacobi stencil Table maker's dilemma Pipelined communications Pipelined communications
809	“Accumulation by Dispossession” by the Global Extractive Industry: The Case of Canada Kinuthia, Wanyee 13 November 2013 (has links) This thesis draws on David Harvey’s concept of “accumulation by dispossession” and an international political economy (IPE) approach centred on the institutional arrangements and power structures that privilege certain actors and values, in order to critique current capitalist practices of primitive accumulation by the global corporate extractive industry. The thesis examines how accumulation by dispossession by the global extractive industry is facilitated by the “free entry” or “free mining” principle. It does so by focusing on Canada as a leader in the global extractive industry and the spread of this country’s mining laws to other countries – in other words, the transnationalisation of norms in the global extractive industry – so as to maintain a consistent and familiar operating environment for Canadian extractive companies. The transnationalisation of norms is further promoted by key international institutions such as the World Bank, which is also the world’s largest development lender and also plays a key role in shaping the regulations that govern natural resource extraction. The thesis briefly investigates some Canadian examples of resource extraction projects, in order to demonstrate the weaknesses of Canadian mining laws, particularly the lack of protection of landowners’ rights under the free entry system and the subsequent need for “free, prior and informed consent” (FPIC). The thesis also considers some of the challenges to the adoption and implementation of the right to FPIC. These challenges include embedded institutional structures like the free entry mining system, international political economy (IPE) as shaped by international institutions and powerful corporations, as well as concerns regarding ‘local’ power structures or the legitimacy of representatives of communities affected by extractive projects. The thesis concludes that in order for Canada to be truly recognized as a leader in the global extractive industry, it must establish legal norms domestically to ensure that Canadian mining companies and residents can be held accountable when there is evidence of environmental and/or human rights violations associated with the activities of Canadian mining companies abroad. The thesis also concludes that Canada needs to address underlying structural issues such as the free entry mining system and implement FPIC, in order to curb “accumulation by dispossession” by the extractive industry, both domestically and abroad. natural resources raw materials global extractive industry mining accumulation by dispossession primitive accumulation resource curse free, prior, and informed consent (FPIC) consultation free entry Bill C-300 Omnibus Bill self-determination madaraka land grabs governance gap enforcement vacuum regulatory gap landlessness involuntary resettlement displacement liberalization financial markets capitalism International Monetary Fund (IMF) Environmental Impact Assessment (EIA) Impact and Benefits Agreement (IBA) corporate social responsibility (CSR) international political economy (IPE) Washington Consensus Poverty Reduction Strategy Paper (PRSP) sustainable development rare earth oil fossil fuels Whitehorse Mining Initiative (WMI) foreign direct investment (FDI) privatization neoliberal / corporate globalization Northern Gateway pipeline project Ring of Fire centre-periphery metropolitan-hinterland Gross Domestic Product (GDP) Extractive Industries Review (EIR) Sub-Saharan Africa war on terror terrorists false flag terrorism Fisheries Act Navigable Waters Protection Act primary goods aid Third World debt free trade modernization dependency tariffs trade barriers HudBay home country liability state Toronto Stock Exchange (TSX) spatio-temporal fix militarism Sudbury Atlantic Canada Crown neo-colonialism industrial revolution imperialism public policy democracy justice Export Development Corporation (EDC) Kimberley Process Mining Association of Canada equity austerity measures Mining Act reforms proletariat aboriginal Least Developed Countries (LDCs) developing country comparative advantage human rights export-led development Tiomin Government of Kenya Government of Canada Economic and Social Council (ECOSOC) World Bank Group (WBG) World Trade Organization (WTO) Bill C-38 Bill C-45 Assembly of First Nations (AFN) Idle No More meaningful participation AFRICOM titanium Base Resources Australia House of Commons conditionalities Structural Adjustment Programmes (SAPs)
810	“Accumulation by Dispossession” by the Global Extractive Industry: The Case of Canada Kinuthia, Wanyee January 2013 (has links) This thesis draws on David Harvey’s concept of “accumulation by dispossession” and an international political economy (IPE) approach centred on the institutional arrangements and power structures that privilege certain actors and values, in order to critique current capitalist practices of primitive accumulation by the global corporate extractive industry. The thesis examines how accumulation by dispossession by the global extractive industry is facilitated by the “free entry” or “free mining” principle. It does so by focusing on Canada as a leader in the global extractive industry and the spread of this country’s mining laws to other countries – in other words, the transnationalisation of norms in the global extractive industry – so as to maintain a consistent and familiar operating environment for Canadian extractive companies. The transnationalisation of norms is further promoted by key international institutions such as the World Bank, which is also the world’s largest development lender and also plays a key role in shaping the regulations that govern natural resource extraction. The thesis briefly investigates some Canadian examples of resource extraction projects, in order to demonstrate the weaknesses of Canadian mining laws, particularly the lack of protection of landowners’ rights under the free entry system and the subsequent need for “free, prior and informed consent” (FPIC). The thesis also considers some of the challenges to the adoption and implementation of the right to FPIC. These challenges include embedded institutional structures like the free entry mining system, international political economy (IPE) as shaped by international institutions and powerful corporations, as well as concerns regarding ‘local’ power structures or the legitimacy of representatives of communities affected by extractive projects. The thesis concludes that in order for Canada to be truly recognized as a leader in the global extractive industry, it must establish legal norms domestically to ensure that Canadian mining companies and residents can be held accountable when there is evidence of environmental and/or human rights violations associated with the activities of Canadian mining companies abroad. The thesis also concludes that Canada needs to address underlying structural issues such as the free entry mining system and implement FPIC, in order to curb “accumulation by dispossession” by the extractive industry, both domestically and abroad. natural resources raw materials global extractive industry mining accumulation by dispossession primitive accumulation resource curse free, prior, and informed consent (FPIC) consultation free entry Bill C-300 Omnibus Bill self-determination madaraka land grabs governance gap enforcement vacuum regulatory gap landlessness involuntary resettlement displacement liberalization financial markets capitalism International Monetary Fund (IMF) Environmental Impact Assessment (EIA) Impact and Benefits Agreement (IBA) corporate social responsibility (CSR) international political economy (IPE) Washington Consensus Poverty Reduction Strategy Paper (PRSP) sustainable development rare earth oil fossil fuels Whitehorse Mining Initiative (WMI) foreign direct investment (FDI) privatization neoliberal / corporate globalization Northern Gateway pipeline project Ring of Fire centre-periphery metropolitan-hinterland Gross Domestic Product (GDP) Extractive Industries Review (EIR) Sub-Saharan Africa war on terror terrorists false flag terrorism Fisheries Act Navigable Waters Protection Act primary goods aid Third World debt free trade modernization dependency tariffs trade barriers HudBay home country liability state Toronto Stock Exchange (TSX) spatio-temporal fix militarism Sudbury Atlantic Canada Crown neo-colonialism industrial revolution imperialism public policy democracy justice Export Development Corporation (EDC) Kimberley Process Mining Association of Canada equity austerity measures Mining Act reforms proletariat aboriginal Least Developed Countries (LDCs) developing country comparative advantage human rights export-led development Tiomin Government of Kenya Government of Canada Economic and Social Council (ECOSOC) World Bank Group (WBG) World Trade Organization (WTO) Bill C-38 Bill C-45 Assembly of First Nations (AFN) Idle No More meaningful participation AFRICOM titanium Base Resources Australia House of Commons conditionalities Structural Adjustment Programmes (SAPs)

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