Tesis sobre el tema "Micro-models"
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Winkelmann, Christopher Todd. "Micro-imaging characterization of mouse models of metastasis". Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/5820.
Texto completoThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Vita. "December 2005" Includes bibliographical references.
Boehnke, Jasper. "Business models for Micro CHP in residential buildings". kostenfrei, 2007. http://www.unisg.ch/www/edis.nsf/wwwDisplayIdentifier/3375.
Texto completoHejkal, Filip. "Micro-economic Models and their Validity - comparison of the models with the real situation". Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-10175.
Texto completoMosler, Gioia. "Micro-environmental models of human exposure to air pollution". Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/25087.
Texto completoDELFINO, EMANUELA. "Exploring micro-Electrocorticographic Signals: from Animal Models to Humans". Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488155.
Texto completoL’elettocorticografia (ECoG) è una tecnica di registrazione delle variazioni nell’attività nervosa utilizzata sia in clinica sia nell’ambito della ricerca scientifica, caratterizzata da un’alta risoluzione spazio-temporale. In studi recenti, sono state esplorate diverse strategie al fine di decodificare il linguaggio a partire da segnali elettrocorticografici, con risultati altamente promettenti. Tuttavia, molteplici aspetti della sintesi del linguaggio a partire dall’attività cerebrale devono essere migliorati prima di intraprendere la sfida dei trial clinici. Il primo aspetto che potrebbe essere migliorato riguarda la tollerabilità dell’impianto in cronico. L’utilizzo dell’ECoG standard costituisce un vantaggio nella decodifica del linguaggio, per la sua capacità di coprire diverse aree coinvolte nella produzione del linguaggio; tuttavia, questo aspetto è anche uno dei suoi più grandi svantaggi. Infatti, la procedura standard di impianto delle matrici ECoG richiede operazioni chirurgiche invasive, a causa della loro dimensione. Un nuovo approccio basato su matrici ad alta densità di micro-elettrodi posizionate direttamente sulla zona di interesse potrebbe massimizzare la specificità del segnale registrato. Inoltre, l’uso di materiali conformabili minimizzerebbe il rischio di danno alla corteccia e di morte neuronale per reazioni infiammatorie. Il secondo aspetto che potrebbe essere migliorato è dovuto alla necessità di progettare neuro-protesi per la codifica e la decodifica del linguaggio implicito a partire da segnali neurali. L’obiettivo di questi sistemi è di migliorare la qualità della vita di pazienti affetti da sindromi locked-in (LIS). In tali pazienti, la vocalizzazione è resa impossibile da gravi paralisi, nonostante la capacità di generare il linguaggio a livello corticale sia essere ancora intatta. Un miglioramento chiave nello sviluppo di neuroprotesi per il linguaggio consisterebbe nell’implementare un sistema di trigger per la decodifica del linguaggio, basato su segnali neurali registrati in aree coinvolte nella produzione. Una volta determinata la configurazione ottimale per la registrazione dei segnali in vivo su ratti Long Evans in termini di configurazioni elettriche di reference e ground, Single-Ended-Screw (senza reference), Differential o Single-Ended-Reference (con reference), è stato possibile traslare la conoscenza sull’uomo. La miglior configurazione validata in vivo è stata anche testata durante un esperimento condotto su un paziente sottoposto alla rimozione chirurgica di un glioma. Durante l’esperimento sono stati testati due dispositivi μECoG, appoggiati su un’area eloquente nota come speech arrest. Il soggetto durante l’esperimento ha eseguito un compito di denominazione di oggetti per un totale di trenta ripetizioni per dispositivo. Le features estratte dall’analisi tempo-frequenza in diverse bande sono state usate per addestrare un classificatore al riconoscimento della fase preparatoria del linguaggio. I segnali registrati mostrano pattern temporalmente specifici nelle diverse bande di frequenza di interesse (15-30 Hz, 30-60 Hz, 70-150 Hz). In particolare, l’attività anticipatoria nella banda del gamma alto ha permesso di predire con elevata accuratezza le fasi preparatorie del linguaggio. Tale scoperta potrebbe essere integrata in neuro-protesi per il linguaggio, come trigger per iniziare la decodifica quando non è possibile misurare un evento esplicito. I risultati di questa tesi forniscono nuove prospettive per la comprensione di processi complessi e ancora poco chiari come la produzione del linguaggio.
Cribäck, Kevin. "Micro payments : Viable technical platforms and models for a bankto provide payments on micro amounts". Thesis, Uppsala universitet, Analys och sannolikhetsteori, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-354933.
Texto completoYing, Guanwen. "Efficient Harmonic Simulations of Trabecular Bone Micro Finite Element Models". Thesis, Uppsala University, Department of Information Technology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-103037.
Texto completoThe background problem is the disease of osteoporosis, which is caused by loss of bone mineral density and deterioration of bone micro-architecture. There are several problems of interest, related to the osteoporosis disease. One straightforward question to answer is whether a given bone tissue can withstood a particular load. Another question of big importance for a physician is what is the effect of a particular medical treatment, whether the medication has lead to increase of bone mass and where. Of no less importance is to study and compare the efficiency of various methods to improve the strength of the bone tissue with respect to load. According to recent research, there is evidence that applying a harmonic force with very small magnitude and proper frequency to human bone tissue can prevent or even reversethe disease. Thus, it is important to examine how bone responds to harmonic forces.
Practice has shown that in order to study a phenomenon such as the behaviour of human bone tissue under load, we have to use numerical simulations performed on a computer. Numerical simulations, in turn require:1. a good mathematical model to describe the underlying physical process,2. accurate numerical discretization techniques,3. efficient and reliable numerical solution methods to solve the algebraic systems of equations which arise after discretization,4. adequate program implementation to enable fast and scalable execution of the tasks, defined by the numerical solution.
This thesis includes a description of mathematical modeling and finite elementdiscretization. Suitable numerical algorithms to solve the arising linear systems are described and analysed, and numerical results for various benchmark problems are presented, compared and analysed.
Calegari, Roberta <1982>. "Micro-intelligence for the IoT: logic-based models and technologies". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8521/1/RC-thesis.pdf.
Texto completoMizzi, Simon. "Extended macroscopic models for rarefied gas dynamics in micro-sized domains". Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501879.
Texto completoMedikonda, Sandeep. "Micro-Mechanical Models for Impact and Non-Local Averaging in Composites". University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1522419945945237.
Texto completoDias, Fernandes Lucas. "From micro to macro : spatial models in molecular and evolutionary biology". Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=229716.
Texto completoTse, Shuetfung. "Models of micro positioning and methods for surface grinding process control /". View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?MECH%202008%20TSE.
Texto completoAsproulis, N. "Hybrid molecular and continuum fluid dynamics models for micro and nanofluidic flows". Thesis, Cranfield University, 2009. http://dspace.lib.cranfield.ac.uk/handle/1826/6966.
Texto completoO'Berry, Arthur Dylan. "Transportation engineering assimilated livability planning using micro-simulation models for Southeast Florida". Thesis, Florida Atlantic University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1602494.
Texto completoTransportation engineering has taken upon a new role; to empower the alternative modes of travel: walking, biking, and bus transit. In this new era, engineers are rethinking a network designed predominately for the automobile. The ultimate goal of this research is to create a process that can make a vehicle dominant corridor a desirable, livable thoroughfare by livability design and context sensitive performance measures. Balancing travel modes requires an account of vehicular traffic and the impact of reconfiguring existing conditions. The analysis herein is conducted by field data collection, transportation equations and microsimulation. Simulating traffic behavior will be the means to apply livable alternatives comparable to existing Southeast Florida conditions. The results herein have shown that micro-simulation can be utilized in transportation planning to reveal good livability alternatives.
Stone, Devon. "An exploration of alternative features in micro-finance loan default prediction models". Master's thesis, Faculty of Science, 2020. http://hdl.handle.net/11427/32377.
Texto completoCarlsson, Henrik y Tobias Thorsson. "Micro simulation models for traffic analyses and a comparison of different junction proposals". Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97782.
Texto completoMargraf, C. "On the use of micro models for claims reversing based on aggregate data". Thesis, City, University of London, 2017. http://openaccess.city.ac.uk/17908/.
Texto completoLind, Eric K. "Analysis of turbulence models in a cross flow pin fin micro-heat exchanger". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Jun%5FLind.pdf.
Texto completoZatti, Susi. "Micro-engineered skeletal and cardiac muscle for Duchenne muscular dystrophy in vitro models". Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3422953.
Texto completoLa distrofia muscolare di Duchenne è una delle più frequenti e severe patologie genetiche neuromuscolari che affliggono la funzionalità del muscolo scheletrico e cardiaco. Il gene codificante la distrofina, proteina la cui mutazione è alla base della patologia, è stato scoperto più di vent’anni fa. Da allora, notevoli progressi sono stati compiuti nella comprensione della patogenesi di questa malattia e diverse strategie sperimentali volte al suo trattamento sono state testate, sia in vitro su convenzionali colture cellulari che in vivo su diversi animali modello. Tuttavia, eccezione fatta per alcuni promettenti risultati recentemente ottenuti in trials clinici, ad oggi non vi è ancora una cura efficace e definitiva in grado di alterare o rallentare la progressione di questa patologia, il cui tasso di mortalità è pari al 100%. In tale contesto, lo scopo di questa tesi di dottorato è quello di sviluppare dei modelli in vitro micro-ingegnerizzati di muscolo scheletrico e cardiaco umano, che siano rappresentativi dei tessuti distrofici e dunque utili per testare approcci terapeutici volti al ripristino dell’espressione di distrofina. La strategia applicata per l’ottenimento di tali modelli si basa sull’applicazione di tecnologie su microscala per riprodurre in vitro i principali stimoli che guidano il differenziamento e consentono la funzionalità del muscolo scheletrico e cardiaco in vivo. In particolare, le proprietà meccaniche del micro-ambiente e l’organizzazione topologica della coltura cellulare sono stati ottimizzati sia per il muscolo scheletrico che cardiaco. Tali tecnologie su micro-scala sono state accoppiate con un’appropriata fonte cellulare umana. Per l’ingegnerizzazione del muscolo scheletrico sono stati utilizzati mioblasti umani primari derivanti da biopsie di pazienti DMD mentre, per la modellazione del muscolo cardiaco, cellule umane pluripotenti indotte (iPS) sono state differenziate in cardiomiociti paziente-specifici. Entrambi i modelli in vitro di muscolo distrofico ottenuti sono stati validati testando l’abilità di diversi approcci terapeutici nel ripristinarne l’espressione di distrofina. In particolare, tre diversi tipi cellulari miogenici sono stati testati nel muscolo scheletrico distrofico ingegnerizzato. Inoltre, nei cardiomiociti distrofici derivanti da cellule iPS è stato testato il ripristino dell’espressione di distrofina per mezzo di un cromosoma artificiale portante la sua completa sequenza genomica. Da tali risultati emerge come i modelli umani in vitro sviluppati in questo lavoro possano rappresentare un’utile piattaforma su cui effettuare test pre-clinici preliminari di diverse strategie terapeutiche. Inoltre, essi posso potenzialmente essere utilizzati come strumento complementare durante i trials clinici, per testare, ad esempio, diverse preparazioni di cellule destinate al paziente.
Iori, Gianluca. "Micro-FEM models based on micro-CT reconstructions for the in vitro characterization of the elastic properties of trabecular bone tissue". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5422/.
Texto completoScott, Laurie Croslin Zeng Yong. "Bayesian inference via filtering of micro-movement multivariate stock price models with discrete noises". Diss., UMK access, 2006.
Buscar texto completo"A dissertation in mathematics and economics." Advisor: Yong Zeng. Typescript. Vita. Title from "catalog record" of the print edition Description based on contents viewed Jan. 29, 2007. Includes bibliographical references (leaves 121-124). Online version of the print edition.
Göktepe, Serdar. "Micro-macro approaches to rubbery and glassy polymers : predictive micromechanically-based models and simulations". Stuttgart Institut für Mechanik (Bauwesen) der Universität Stuttgart, 2007. http://elib.uni-stuttgart.de/opus/volltexte/2007/3342/.
Texto completoNapolitano, Anthony P. "Directing cellular self-assembly for micro-scale tissue engineering and in vitro tissue models". View abstract/electronic edition; access limited to Brown University users, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3319111.
Texto completoPoidomani, Viola. "Micro-simulation models at neighbourhood scale: the interplay of agents, buildings, activities and transport". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5725/.
Texto completoCarpanini, Sarah Marie. "Characterisation of a novel Rab18 mouse model for Warburg Micro syndrome". Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9611.
Texto completoGauntt, Stephen Byron. "Micro-chamber filling experiments for validation of macro models with applications in capillary driven microfluidics". [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2538.
Texto completoVARGAS, KELLY MARGARITA COLMENARES. "OIL DISPLACEMENT IN MICRO MODELS OF POROUS MEDIA BY INJECTION OF OIL IN WATER EMULSION". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2014. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=35523@1.
Texto completoCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
PROGRAMA DE EXCELENCIA ACADEMICA
O processo de recuperação de óleo pelo deslocamento com água é o método mais utilizado na indústria de petróleo. No entanto, as altas razões de mobilidade e baixas eficiências de varrido tornam o processo menos eficiente. Uma alternativa usada para minimizar este efeito é a aplicação de tecnologias que atuam como agentes de controle de mobilidade. Dentre eles, e em particular a injeção de emulsões de óleo em água tem sido estudada com relativo sucesso como um método de recuperação avançada de óleo. Alguns estudos indicam melhor varredura do reservatório devido a uma redução da mobilidade da água em regiões do reservatório já varridas por água, mediante a aglomeração e bloqueio parcial dos poros mais permeáveis com gotas da fase dispersa da emulsão. Contudo, ainda não há compreensão plena dos mecanismos associados ao escoamento de emulsões em meios porosos, assim, uma análise e visualização na escala microscópica dos fenômenos envolvidos se faz essencial para a melhora do entendimento do escoamento de emulsões em um reservatório. Neste trabalho, experimentos de escoamento de emulsões foram conduzidos em um micromodelo de vidro, estrutura artificial que busca representar alguns aspectos principais de um meio poroso e proporciona uma adequada visualização do comportamento das faces ao longo do escoamento. Nos experimentos foram realizadas alterações na molhabilidade e variou-se a vazão volumétrica a fim de avaliar diferentes números de capilaridade no meio poroso. Dentro dos resultados mais significativos, foi evidenciado como a fase dispersa da emulsão é capaz de bloquear os poros e gargantas de poro alterando a distribuição dos fluidos no meio poroso, melhorando a eficiência de deslocamento na escala de poro e com isso o fator de recuperação final. Os resultados mostram que, a altos números de capilaridade as forças interfaciais são menos importantes ao reduzir o efeito de bloqueio pelas gotas da fase dispersa nos poros do micromodelo. Estes resultados fornecem um grande aprendizado ao permitir conhecer características do escoamento de emulsões no meio poroso para uma futura aplicação no campo.
The oil recovery process by water-flooding is the most used method in the oil industry. However, the high mobility ratios and low sweep efficiencies make the process less effective. A common alternative to minimize this effect is the application of technologies that act as mobility control agents. Among them and in particular the injection of oil in water emulsions has been studied with relative success as an Enhanced Oil Recovery (EOR) method. Several studies indicate a better reservoir sweep due to the water mobility reduction in regions already swept by water. This reduction can be associated with partial blockage of porous media throats by droplets of emulsion dispersed phase. Nevertheless, there is still no full understanding of the mechanisms associated to the flow of emulsions in porous media, thus, an analysis and visualization at the microscopic scale of the involved phenomena is essential for the improvement of the comprehension of the flow of emulsions in a reservoir. In this work, experimental tests related to the flow of emulsions in a glass micro-model were performed, artificial device that represents some principal features of a porous medium and provides a proper visualization of the phase behavior. In the experiments, the effect of the capillary number on the oil recovery factor and the relative influence of the wettability of the porous medium on the oil displacement process were studied. The results evidence how the oil droplets in the emulsion are capable of block the pores and the pore throats modifying the fluids distribution in the porous medium, improving the displacement efficiency at pore scale and consequently the final oil recovery factor. It was also observed that at high capillary numbers, the blocking caused by the capillary pressure needed to deform the droplet becomes less intense. These results provide a great learning by allowing to know the characteristics of the flow of emulsions in porous media for a future field application.
Sissons, Matthew. "Micro-wind power in the UK : experimental datasets and theoretical models for site-specific yield analysis". Thesis, University of Southampton, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543418.
Texto completoTian, Kun. "Essays on price rigidity in the UK : evidence from micro data and implications for macro models". Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/49986/.
Texto completoMiller, Kyle M. "Mechanical Characterization of Lithium-Ion Battery Micro Components for Development of Homogenized and Multilayer Material Models". Thesis, Monterey, California. Naval Postgraduate School, 2014. http://hdl.handle.net/10945/43074.
Texto completoThe overall battery research of the Impact and Crashworthiness Laboratory (ICL) at MIT has been focused on understanding the battery’s mechanical properties so that individual battery cells and battery packs can be characterized during crash events. The objective of this research is to better understand the battery component (electrode and separator) properties under different loading conditions. In this work, over 200 tests were conducted on battery components. These tests include uniaxial stress, biaxial punch, multilayer, single layer, short-circuit testing, wet vs dry specimen testing, strain rate testing, and more. Additionally, a scanning electron microscope was used to view the battery components at a micro level for the purpose of better understanding the aforementioned test results. During these tests, it was observed that many of the electrodes in the Li-ion batteries are damaged during the battery manufacturing process. Also, the two methods of manufacturing battery separator were analyzed and their resulting mechanical properties were characterized. These results will be used to further refine and validate a high-level, robust, and accurate computational tool to predict strength, energy absorption, and the onset of electric short circuit of batteries under real-world crash loading situations. The cell deformation models will then be applied to the battery stack and beyond, thereby enabling rationalization of greater optimization of the battery pack/vehicle combination with respect to tolerance of battery crush intrusion behavior. Besides improving crash performance, the finite element models contribute substantially to the reduction of the cost of prototyping and shorten the development cycle of new electric vehicles.
Miller, Kyle M. (Kyle Mark). "Mechanical characterization of lithium-ion battery micro components for development of homogenized and multilayer material models". Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/92133.
Texto completoThesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 60).
The overall battery research of the Impact and Crashworthiness Laboratory (ICL) at MIT has been focused on understanding the battery's mechanical properties so that individual battery cells and battery packs can be characterized during crash events. The objective of this research is to better understand the battery component (electrode and separator) properties under different loading conditions. In this work, over 200 tests were conducted on battery components. These tests include uniaxial stress, biaxial punch, multilayer, single layer, short-circuit testing, wet vs dry specimen testing, strain rate testing, and more. Additionally, a scanning electron microscope was used to view the battery components at a micro level for the purpose of better understanding the aforementioned test results. During these tests, it was observed that many of the electrodes in the Li-ion batteries are damaged during the battery manufacturing process. Also, the two methods of manufacturing battery separator were analyzed and their resulting mechanical properties were characterized. These results will be used to further refine and validate a high-level, robust, and accurate computational tool to predict strength, energy absorption, and the onset of electric short circuit of batteries under real-world crash loading situations. The cell deformation models will then be applied to the battery stack and beyond, thereby enabling rationalization of greater optimization of the battery pack/vehicle combination with respect to tolerance of battery crush intrusion behavior. Besides improving crash performance, the finite element models contribute substantially to the reduction of the cost of prototyping and shorten the development cycle of new electric vehicles.
by Kyle M. Miller.
Nav. E.
S.M.
Moscovic, Sandra A. "Development of time and workload methodologies for Micro Saint models of visual display and control systems". Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40443.
Texto completoDowds, Eleanor Jane y Fatme El-Saghir. "Utilising waste heat from Edge-computing Micro Data Centres : Financial and Environmental synergies, Opportunities, and Business Models". Thesis, KTH, Industriell ekonomi och organisation (Inst.), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298245.
Texto completoPå senare har tid har det skett en explosion i behovet av databehandling och databehandling med hög densitet. Som ett resultat har Internet- och kommunikationstekniksektorns (ICT) efterfråga på globala energiresurser tredubblats under de senaste fem åren. Edgecomputing för datorkraften närmre användaren och är hörnstenen i framtida kommunikation och informationsflöde. Omedelbar svarstid och noll latens som behövs för applikationersom 5G, självkörande fordon, ansiktsigenkänning och mycket mer tillfredställs av att datorkraften förs närme användaren. Micro Data Center är nycklen i övergången till edge computing. Eftersom att MicroData Center är fristående med inbyggda kylsystem kan de placeras där de behövs mest -ofta i områden som inte betraktas som platser för datacenter som exemeplvis kontor och bostadshus. Detta möjliggör för ICT-branschen att bli grönare och bidra till att sänka det totala globala energibehovet, samtidigt som behovet av databehandling kan tillgodoses. Om enlösning kan hittas för att fånga upp och använda spillvärme som genereras från växande antalet Micro Data Center, skulle det ha en enorm inverkan på den totala energiförbrukningen. Detta projekt kommer att undersöka potentiella synergier genom att undersöka två olikasätt att utnyttja spillvärme. Den första är att leverera spillvärme till fjärrvärmenätet (Case 1), och det andra att använda Micro Data Center som en "Data Furnace" som levererar värme till närområdet (Case 2 och 3). Två scenarier med olika kostnader och intäkter kommer att undersökas i varje Case och en känslighetsanalys kommer att utföras för att avgöra hur känsligt varje scenario är för ändrade interna och externa faktorer. Resultaten som uppnåtts är extremt lovande. Att fånga upp spillvärme från Micro Data Center och leverera till antingen det lokala fjärrvärmenätet eller nyttja spillvärmen lokalt har visat sig vara både ekonomiskt och fysiskt genomförbart. De tre olika affärsmodellerna (’Cases’) som skapats visar inte bara positivt ekonomiskt utfall, utan också ett sätt att skapa värde genom att på ett grönare sätt processa och lagra data och samtidigt värma städer. Mängden spillvärme som kan fångas upp är tillräcklig för att värma upp många lägenheter i bostadshus och kontorsbyggnader. Temperaturen på spillvärmen har visat sig vara tillräcklig för att uppfylla uppvärmningskraven i dessa anläggningar, vilket innebär att ingen extra energi krävs för att höja temperturen av spillvärme. Förhoppningen är att de undersökningar och analyser som utförs i denna rapport kommer att främja diskussionen kring utnyttjande av spillvärme från lägre energikällor, såsom Micro Data Center.
Göktepe, Serdar [Verfasser]. "Micro-macro approaches to rubbery and glassy polymers : predictive micromechanically-based models and simulations / vorgelegt von Serdar Göktepe". Stuttgart : Inst. für Mechanik (Bauwesen), 2007. http://d-nb.info/99705350X/34.
Texto completoSchuster, Simon [Verfasser] y Stefan [Akademischer Betreuer] Zahler. "Models for angiogenesis on micro-structured surfaces : a novel view on endothelial cell biology / Simon Schuster. Betreuer: Stefan Zahler". München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/109312492X/34.
Texto completoJonsson, Gabriel, Louise Fredriksson y Miljevic Rebecca Lööv. "Exploring how Barriers to Circular Business Models can be Overcome on a Macro and Micro Level : -a Swedish Textile Industry Perspective". Thesis, Internationella Handelshögskolan, Jönköping University, IHH, Företagsekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-49143.
Texto completoOnifade, Ibrahim. "Development of Energy-based Damage and Plasticity Models for Asphalt Concrete Mixtures". Doctoral thesis, KTH, Byggnadsmaterial, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198663.
Texto completoEn heltäckande karakterisering av skador och plastiska beteende hos asfaltblandningar under varierande belastningshastighet och spänningstillstånd är en komplex och svår uppgift. En orsak till detta är relaterat till materialets belastningshastighet- och temperaturberoende, såväl som variationen i materialegenskaperna hos de ingående komponenterna i den sammansatta asfaltblandningen. Befintliga spänningsbaserade modeller för asfaltbetongmaterial är utvecklade baserade på mekanikprinciper, men dessa modeller är begränsade när det gäller analys och design av verkliga asfaltsbeläggningar eftersom hastighetsberoende parametrar behövs i den konstitutiva modellen även med hänsyn till töjningshastighetens inverkan på kriterier för gränser och utveckling av spänningstillstånd. Det finns därför behov av att utveckla enkla men ändå heltäckande konstitutiva modeller som kan användas för att modellera beteendet hos asfaltmassan över ett brett spektrum av belastningshastigheter för olika av sektioner asfaltsbeläggningar. Syftet med denna avhandling är att öka förståelsen av hållfasthets- och deformationsmekanismer för asfaltblandningar genom multi-modellering. Målet är att utveckla enkla och heltäckande kontinuummodeller som karakteriserar materialets olinjära beteende under varierande spänningstillstånd och betingelser. Ett analysramverk har utvecklats för utvärdering av påverkan av asfaltmassans morfologi på dess mekaniska egenskaper och beteende med hjälp av röntgendatortomografi och digital bildbehandlingsteknik. Detta förfarande har sedan använts för att undersöka förekomsten av inneboende kritiska tröskelvärden för brottenergin för mesosprickinitiering vilket i sin tur ligger till grund för utvecklingen av en teori för modellering av energibaserade skador och plastisk deformation hos asfaltblandningar. En ny energidensitet baserad viskoelastisk skademodell utvecklas och föreslås utgå från kontinuum-skade-mekanik (CDM) och termodynamik för irreversibla processer. En andra ordningens skadevariabeltensor införs för att ta hänsyn till skadedistributionen i materialen i de olika principiella skaderiktningarna. På detta sätt kan materialets respons i drag- och tryckbelastning separeras och effekterna av spänningstillstånd i både drag och tryck kan beaktas på ett adekvat sätt. Baserat på resultaten från den energibaserade skademodellen utvecklas och föreslås en motsvarande metod för mikrosprickspänning gällande skade- och brottkarakteriseringen av asfaltblandningar. Metoden för den effektiva mikrosprickspänningen tar hänsyn till materialets styvhet och en kritisk tröskelenergi för mikrosprickinitiering för karakteriseringen av skador och brottegenskaper hos blandningen. Denna metod är utvecklad baserat på grundläggande mekanikprinciper och kan för rent elastiska material reduceras till Griffiths energibalanskriterium utan hänsyn till ytenergi och sprickstorlek vid bestämningen av brottspänningen. En ny termodynamikbaserad modell för kontinuumplasticitetsmekanik (CPM) utvecklas för att beskriva det plastiska beteendet hos asfaltbetongmaterial med energibaserade kriterier härledda för initiering och progression av plastisk deformation. En intern tillståndsvariabel kallad "plasticitetvariabeln" införs för att beskriva den fördelade dislokationsrörelsen i mikrostrukturen. CPM-modellen förenar befintliga elasto-plastiska och visko-plastiska teorier i en teori och visar sig vara särskilt effektiv i modelleringen av hastighetsberoende plastiskt beteende hos material utan att behöva beakta hastighetsberoende parametrar i de konstitutiva sambanden. CPM-modellen utvidgas ytterligare för att kunna beakta reduktionen av styvheten med stegvis ökad belastning och för att utveckla en enhetlig energibaserad skade- och plasticitetmodell. Modellerna är implementerade i ett finit element (FE)-analysprogram för validering av modellerna. Resultatet visar att de energibaserade modellerna för skador och plastisk deformation kan förutsäga beteendet hos asfaltbetongblandningar under varierande spänningstillstånd och töjningshastighetsförhållanden. Arbetet i denna avhandling utgör grunden för utvecklingen av mer grundläggande förståelse av asfaltbetongmaterialets respons och tillämpningen av sunda och robusta mekanikprinciper i analys och design av asfaltstrukturer.
QC 20161220
Ouiakoub, Mohamed. "Contribution à la connaissance de l’évolution des business models des entreprises familiales marocaines : une approche par les micro-fondations des capacités dynamiques". Thesis, La Rochelle, 2020. http://www.theses.fr/2020LAROD003.
Texto completoToday’s dynamic environment requires firms to adapt their business models as a new source of competitive advantage. This poses significant challenges to firms that are locked in their long-established structures, like family firms. These firms are often confronted, during their life cycle, to evolutions in their business models due to organizational constraints, but also threats and opportunities of their environment. The objective of this research is to explore, by qualitative multiple case study, the BM evolution process and dynamic capabilities that allow the configuration of family business models to evolve over time in order to create and increase value. For this purpose, dynamic capabilities are essential for firms to exploit opportunities and respond to environment changes in general. They are particular important for family firms due to the desire to succeed for future generations. Given that family involvement in business creates idiosyncratic motivations and long-term characteristics that considerably affect the firm’s behavior, this research shows that family businesses reduce environmental uncertainty and dependence by developing their business model, changing the logic of creating and capturing value through their activities. The characteristics of these firms allow them to promote simultaneously exploration and exploitation processes leading to an organizational ambidexterity. Furthermore, our findings reveal strong sensing and seizing as well as transforming capabilities as relevant antecedents of business model evolution and stress upon the important role played by family in balancing internal and external influences, shaping the scope and complexity of business model evolution, and creating specific path dependencies
Berdica, Katja. "TraVIS for Roads - Examples of Road Transport Vulnerability Impact Studies". Doctoral thesis, KTH, Infrastructure, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3438.
Texto completoAkililu, Meaza Negash. "Verification of Rural Traffic Simulator, RuTSim 2". Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-84453.
Texto completoAllwörden, Hannes von Verfasser] y Ingenuin [Akademischer Betreuer] [Gasser. "Stability of Micro- and Macroscopic Traffic Flow Models on the Transition from Circular Road to Infinite Lane / Hannes von Allwörden ; Betreuer: Ingenuin Gasser". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2020. http://nbn-resolving.de/urn:nbn:de:gbv:18-105357.
Texto completoAllwörden, Hannes von [Verfasser] y Ingenuin [Akademischer Betreuer] Gasser. "Stability of Micro- and Macroscopic Traffic Flow Models on the Transition from Circular Road to Infinite Lane / Hannes von Allwörden ; Betreuer: Ingenuin Gasser". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2020. http://d-nb.info/1214370179/34.
Texto completoGoosen, Kelly. "Calibrating high frequency trading data to agent based models using approximate Bayesian computation". Master's thesis, Faculty of Science, 2021. http://hdl.handle.net/11427/33699.
Texto completoQi, Meng. "Development in Normal Mixture and Mixture of Experts Modeling". UKnowledge, 2016. http://uknowledge.uky.edu/statistics_etds/15.
Texto completoMickelsson, Glenn. "DSGE Model Estimation and Labor Market Dynamics". Doctoral thesis, Uppsala universitet, Nationalekonomiska institutionen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-301722.
Texto completoMcDonald, Katrina Anne. "An experimental and finite element investigation of the biomechanics of vertebral compression fractures". Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/30415/1/Katrina_McDonald_Thesis.pdf.
Texto completoCairone, Fabiana. "Models and Systems for the Control of Two-Phase Processes in Microfluidics". Doctoral thesis, Università di Catania, 2019. http://hdl.handle.net/10761/4147.
Texto completoYendodu, Vishnu Vardhan Reddy. "A comprehensive database on air plasma kinetics". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25762/.
Texto completoSandino, Velásquez Clara Inés. "Simulation of mechanoregulation and tissue differentiation in calcium phosphate scaffolds for tissue engineering". Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6211.
Texto completoDos muestras de materiales porosos basados en fosfato de calcio fueron utilizadas. Se desarrollaron mallas de elementos finitos congruentes, discretizando la fase sólida y los macro poros interconectados, con el fin de tener en cuenta la morfología irregular de los andamios.
En primer lugar, se estudió la distribución de los estímulos mecánicos. La fase sólida y el fluido intersticial se simularon como material elástico lineal y como fluido Newtoniano, respectivamente. Se simuló una compresión del 0.5% en el sólido y un fluido con velocidades de entrada de 1, 10 y 100 µm/s en los poros. Se encontraron distribuciones de deformación similares en las paredes ambos materiales, con valores máximos de 1.6% en compresión y de 0.6% en tracción. En algunos poros, la velocidad del fluido aumentó a 100 y 1000 veces la velocidad de entrada. Este estudio mostró como estímulos mecánicos macroscópicos pueden causar distintos niveles de estímulos mecánicos microscópicos dentro los andamios, debido a la morfología.
A continuación se realizó un estudio en el tiempo de la diferenciación de tejido en un andamio sometido a condiciones in vitro. La compresión y la perfusión se modelaron como en el estudio anterior. Se simularon una compresión del 0.5% y una velocidad de entrada de fluido constante de 10 µm/s o una presión de entrada de fluido constante de 3 Pa. La deformación cortante octaédrica y el esfuerzo cortante del fluido se utilizaron como estímulos mecano-regulatorios basándose en la teoría de Prendergast et al. (1997). Al aplicar velocidad constante, se predijeron fluctuaciones entre los estímulos equivalentes a la formación de tejido y a la muerte celular, debido al aumento en el esfuerzo cortante del fluido cuando el tejido comienza a llenar los poros. Sin embargo, al aplicar presión constante, se predijo estímulo equivalente a la diferenciación de tejido óseo en la mitad del volumen de los poros. Estos resultados sugieren que para permitir la diferenciación de tejido, la velocidad del fluido debe disminuirse cuando el tejido empieza a mineralizarse.
Finalmente, se llevó acabo un estudio en el tiempo de la angiogénesis y de la diferenciación de tejido en un andamio bajo condiciones in vivo. La deformación cortante octaédrica y la velocidad relativa del fluido se utilizaron como estímulos mecano-regulatorios. Las fases sólida y porosa fueron tratadas como materiales poroelásticos. Se simuló la actividad individual de las células. Compresiones de 0.5 y 1% fueron simuladas. La mayoría de los vasos crecieron en los poros de la periferia del andamio y se bloquearon por las paredes. Se formaron redes capilares similares independientemente de la magnitud de deformación utilizada. Al aplicar 0.5% de compresión, estímulos correspondientes a la formación de hueso se predijeron en el 70% del volumen de los poros, sin embargo, sólo el 40% del volumen se llenó de osteoblastos debido a la falta de oxigeno. Este estudio mostró el efecto de la falta de vascularización en el centro del andamio en la diferenciación de tejido.
Ese tipo de estudios, combinados con estudios in vitro, deberían contribuir a la comprensión del proceso de diferenciación de los tejidos dentro de los andamios y por lo tanto a la mejora de los métodos de diseño de andamios.
Mechanical stimuli are one of the factors that affect cell differentiation in the process of bone tissue regeneration; therefore, in the development of scaffolds for tissue engineering, mechanical loads can be applied in order to induce cell activity. The specific mechanical stimuli transmitted to cells at a microscopic level when mechanical loads are applied can be studied using numerical techniques. The objective of this thesis was to study the mechanoregulation of tissue differentiation within calcium phosphate scaffolds using micro computed tomographed based finite element models.
Two samples of porous calcium phosphate based materials were used. Congruent finite element meshes, with the solid phase and the interconnected pores discretized, were developed in order to account for the scaffold irregular morphology.
First, a study of the distribution of mechanical stimuli was performed. The solid phase and the fluid flow within the pores were modeled as linear elastic solid material and Newtonian fluid respectively. Compressive strains of 0.5% of total deformation applied to the solid and interstitial fluid flows with inlet velocities of 1, 10 and 100 µm/s applied to the pores were simulated. Similar strain distributions for both materials were found, with compressive and tensile strain maximal values of 1.6% and 0.6% respectively. For the fluid flow models, the fluid velocity in some of the scaffold pores increased to 100 and 1000 times the inlet velocity. This study showed how mechanical loads and fluid flow applied to the scaffolds caused different levels of mechanical stimuli within the samples according to the morphology of the materials.
Next, a study of the mechanoregulation of tissue differentiation over time in a scaffold subjected to in vitro loads was performed. The solid phase and the fluid flow were modeled as in the study described above. Compressive strain of 0.5% and fluid flow with constant inlet velocity of 10 µm/s or constant inlet pressure of 3 Pa were applied. Octahedral shear strain and fluid shear stress were used as mechano-regulatory stimuli based on the theory of Prendergast et al. (1997). When a constant velocity was simulated, fluctuations between stimuli equivalent to tissue formation and cell death were predicted due to the increase in the fluid shear stress when tissue started to fill the pores. However, when constant pressure was applied, stimuli equivalent to bone formation were predicted in about half of the pore volume. These results suggest that in order to allow tissue differentiation within a scaffold, the fluid velocity should be decreased when tissue starts mineralizing.
Finally, a study of the angiogenesis and the mechanoregulation of tissue differentiation over time in a scaffold subjected to in vivo conditions was performed. Octahedral shear strain and relative fluid velocity were used as mechano-regulatory stimuli. The solid and pore phases were treated as poroelastic materials. Individual cell activity was simulated within the pore domain. Compressive strains of 0.5 and 1% of total deformation were simulated. Most vessels grew in the pores at the periphery of the scaffolds and were blocked by the scaffold walls. Similar capillary networks were formed independently of the magnitude of the mechanical strain applied. When 0.5% of strain was applied, 70% of the pore volume was affected by mechano-regulatory stimuli corresponding to bone formation; however, because of the lack of oxygen, only 40% of the volume was filled with osteoblasts. This study showed the effect of the lack of vascularization in the center of the scaffold on the tissue differentiation.
Such kind of studies, combined with in vitro studies, should contribute to the understanding of the process of tissue differentiation within the constructs and therefore to the improvement of scaffold design methods.
Clark, Peter G. "Multi-scale modelling describing thermal behaviour of polymeric materials. Scalable lattice-Boltzmann models based upon the theory of Grmela towards refined thermal performance prediction of polymeric materials at micro and nano scales". Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5768.
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