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1
Johnsen, Keyji. "D-2-hydroxyacid dehydrogenases." Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319199.
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NGOM, ELHADJI ABIB. "Contribution a l'etude des spectres infrarouges de quelques rotateurs asymetriques d : :(2)s, d::(2)o, no::(2)." Paris 6, 1987. http://www.theses.fr/1987PA066552.
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Analyse des spectres ir a haute resolution pour plusieurs niveaux d'energie des etats vibrationnels. Les niveaux deduits de l'experience ont ete reproduits a l'aide d'un hamiltonien. Les intensite de nombreuses raies mesures ont permis de determiner la derivee premiere du moment dipolaire et un spectre synthetique complet des bandes a ete calcule
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Gourmelen, Stéphane. "Théories superconformes d = 2, N = 2 et superalgèbres w." Lyon 1, 1997. http://www.theses.fr/1997LYO10360.
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L'etude des theories (super) conformes en dimension 2 se situe a la croisee de deux grands domaines de la physique theorique: l'invariance conforme et la supersymetrie. Leur champ d'applications touche a divers sujets: theories de (super) cordes, phenomenes critiques, systemes integrables, (super) algebres w. Nous traitons des extensions supersymetriques n = 2 des theories conformes dans un formalisme non metrique. Les supersurfaces de riemann (ssr) de type (2,0) et (2,2) sont definies et leurs structures complexes parametrees par des superchamps de beltrami. Definie sur une telle ssr, une theorie de champs superconforme possede une invariance locale liee aux diffeomorphismes et a une symetrie de jauge u(1). L'etude de ces symetries est menee dans le formalisme de brs et appliquee au calcul des anomalies quantiques. Les actions de modeles sigma sont construites sur les ssr (2,0) et (2,2). En outre, nous parametrons les structures projectives des ssr n = 2 grace a une connexion schwarzienne dont l'introduction permet de construire les operateurs superdifferentiels covariants sous les transformations superconformes et globalement definis sur la ssr. Ceux-ci sont classifies et leur ecriture matricielle nous mene, grace a des conditions de courbure nulle, a l'etude des superalgebres w dans le formalisme des superchamps n = 2.
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Naumann, Johann Gottlieb. "Vesper Nr. 5 D-Dur: Für Sopran, Alt, Chor, 2 Oboen, 2 Hörner in D, 2 Trompeten in D, Pauken Violinen, Violen, Basso continuo (Orgel, Violoncello, 2 Fagotte), 1788: Partitur." Ries & Erler, 2019. https://slub.qucosa.de/id/qucosa%3A35888.
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Johann Gottlieb Naumann ist die bedeutendste Persönlichkeit der Dresdner Hofmusik in der zweiten Hälfte des 18. Jahrhunderts. Er wurde am 17. April 1741 in Blasewitz bei Dresden geboren. Nach einer entbehrungsreichen Jugend erhielt er bereits als Sechzehnjähriger in Italien eine gründliche musikalische Ausbildung u. a. bei Giuseppe Tartini und Padre Martini. Nach seiner Rückkehr nach Dresden übertrug die hochgebildete Kurfürstin-Witwe Maria Antonia Walpurgis 1764 dem 23-jährigen das verantwortungsvolle Amt eines Kirchen-Compositeurs. [... aus der Einleitung]
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GarciÌa-Gancedo, GarciÌa Luis. "Magnetomechanical properties of self-biased Terfenol-D 2-2 composites." Thesis, University of Brighton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436805.
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Omid, Hamid. "Holographic fermions in d=2+1." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/36797.
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Recently, a large amount of effort has gone towards using the AdS/CFT conjecture in condensed matter physics. First, we present a review of the conjecture, then we use the conjecture to model 2+1-dimensional fermions. We find three kinds of solutions with different kinds of discrete symmetries. We show that Chern-Simons- like electric responses, computed using a holographic model appear with the right quantized coefficients.
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Cifor, Rada Amalia. "Smoothness-guided 3-D reconstruction for 2-D histological images." Thesis, University of Nottingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539193.
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The microscopic observation of thin sections of anatomical tissue provides knowledge about its molecular and cellular constituents, which is crucial in identifying pathologies, understanding the structure and function of internal organs and for the construction of anatomical atlases. The digitization of these sections yields two dimensional (2-D) images which provide rich anatomical and functional detail at both microscopic and macroscopic level. While the spatial resolution, contrast and specificity of these images continue to outperform the classic three dimensional (3-D) imaging modalities, such as magnetic resonance imaging, their quality and, crucially, quantitative analysis is still limited. The reason is that the organs or anatomical structures of interest are inherently 3-D objects and the analysis of their shape, the computation of their volume, or the comparison of their characteristics across individuals cannot be accurately performed on the basis of 2-D sections alone. Therefore, 3-D volume reconstruction from 2-D histological images usually constitutes a first step in the morphological analysis of the structures imaged by histology. Yet, the loss of 3-D spatial alignment together with the numerous artefacts occurring in the 2-D image acquisition process make reconstruction a difficult task. The work presented in this thesis is based on the observation that the quality of reconstructed histological volumes is usually assessed by considering the smoothness of some reconstructed structures of interest. Our research has two novel contributions: (1) two 3-D reconstruction methods for 2-D histological images which use smoothness as a means to drive the reconstruction process itself; (2) a quantitative measure of smoothness to assess the quality of reconstructed volumes. We apply the reconstruction techniques to various datasets of both synthetic and real histological images. The qualitative visual inspection of the reconstructed volumes is complemented with the quantitative measurements of smoothness with excellent agreement. We also perform a robustness analysis of the proposed reconstruction methods where we evaluate their behaviour in the presence of a variety of geometrical perturbations and typical histological artefacts.gg
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Barrales-Mora, Luis Antonio. "2-D and 3-D grain growth modeling and simulation /." Göttingen : Cuvillier, 2008. http://d-nb.info/990426629/04.
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Lima, Diego Sá de. "Teorias duais massivas de spin-3/2 em D=2+1." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/152895.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Nesta dissertação serão analisados os dois modelos conhecidos na literatura que descrevem partículas massivas de spin 3/2 em D=2+1 dimensões. Essa análise será feita, assim como nos trabalhos relacionados aos bósons (spin 1, spin 2 e spin 3), via procedimento de Imersão de Calibre de Noether (ICN), Solda generalizada, análise de vínculos e condições de Fierz-Pauli. Através de argumentos de simetria, via ICN, apresentaremos uma forma de relacionar os dois modelos e mostraremos que é possível construir um novo modelo de terceira ordem em derivadas. Apresentaremos um modelo de dubleto de segunda ordem em derivadas de onde é possível obter os demais modelos auto-duais da teoria. A partir da aplicação da ICN no modelo de dubleto construiremos um novo modelo, de quarta ordem em derivadas, análogo a versão linearizada da chamada " New Massive Gravity".
In this master's thesis we will analyze the two known models in the literature wich describe massive spin 3/2 particles in D = 2 + 1 dimensions. This analysis will be done, as was previously done on works related to the bosons (spin- 1 , spin- 2 and spin- 3 ), via Noether gauge embedment (NGE) procedure, generalized soldering, hamiltonian constraints analysis and Fierz-Pauli conditions. Through symmetry arguments, by NGE, we will present a way of relating the two models and show that it is possible to construct a new model in third order derivatives. We will show a second order derivative doublet-model whence it is possible to obtain the other self-dual models of the theory. From the application of NGE in the dublet model we will construct a new model, wich has a fourth-order derivative term, analogue to the linearized version of the so-called "New Massive Gravity"
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Cesar, Diego Brito dos Santos. "A 2 1/2 D Visual controller for autonomous underwater vehicle." Escola Politécnica, 2017. http://repositorio.ufba.br/ri/handle/ri/23362.
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Underwater navigation is affected by the lack of GPS due to the attenuation of the electromagnetic signals. Thereby, underwater robots rely on dead reckoning as their main navigation systems. However, localization via dead-reckoning raises uncertainties over time. Consequently, visual and acoustic sensors have been used to increase accuracy in robotic systems navigation, specially when they move in relation to a target object. This level of precision is required, for instance, for object manipulation, inspection, monitoring and docking. This work aims to develop and assess a hybrid visual controller for an autonomous underwater vehicle (AUV) using artificial fiducial markers as reference. Artificial fiducial markers are planar targets, designed to be easily detected by computer vision systems and provide means to estimate the robot’s pose in respect to the marker. They usually have high detection rate and low false positive rate, which are desirable for visual servoing tasks. On this master thesis was evaluated, from among the most popular and open-source marker systems, one that presents the best performance in underwater environments in terms of detection rate, false positives rate, maximum distance and angle for successful detection. Afterwards, the best marker was used for visual servoing purposes in an underwater robot. The firsts experiments were performed on the Gazebo robot simulation environment and, after that, on a real prototype, the FlatFish. Tests on a saltwater tank were performed in order to assess the controller using static and adaptive gains. Finally, sea trials were performed, using the controller that best behaved on the controlled environment in order to assess its performance on a real environment. The tests have shown that the visual controller was able of station-keeping in front of an artificial fiducial marker. Additionally, it was also seen that the adaptive gain brings improvements, mainly because it smooths the robot’s motion on the beginning of the task.
Navegação submarina é afetada pela falta de GPS, devido à atenuação de ondas eletromagnéticas. Por causa disso, os robôs submarinos baseiam-se em sistemas de navegação via odometria e sensores inerciais. Contudo, a localização via esse tipo de abordagem possui uma incerteza associada que cresce com o passar do tempo. Por isso sensores visuais e acústicos são utilizados para aumentar a precisão da navegação de veículos submarinos. Nesse contexto, a utilização de um controlador visual aumenta a precisão dos sistemas robóticos quando se locomovem em relação a um objeto alvo. Esse tipo de precisão é requerida para manipulação de objetos, inspeção, monitoramento e docagem submarina. Esse trabalho tem como objetivo projetar e avaliar um controlador visual híbrido para um veículo submarino autônomo (AUV) utilizando como referência marcos visuais artificiais. Os marcos artificiais são alvos planares projetados para serem facilmente detectados por sistemas de visão computacional, sendo capazes de fornecer meios para estimação da posição do robô em relação ao marco. As suas características de alta taxa de detecção e baixa taxa de falsos positivo são desejáveis para tarefas de controle servo visual. Este trabalho analisou, portanto, dentre os marcos mais populares e de código aberto, aquele que apresenta o melhor desempenho em ambientes submarinos, em termos de taxa de detecção, número de falsos positivos, máxima distância e ângulo para detecção. Posteriormente, o marco que apresentou melhor performance foi utilizado para aplicação de controle visual em um robô submarino. Os primeiros ensaios foram realizados na plataforma de simulação robótica Gazebo e, posteriormente, em um protótipo de AUV real, o FlatFish. Testes em um tanque de água salgada foram realizados visando avaliar a solução proposta utilizando um ganho estático e um ganho adaptativo para o controlador visual. Finalmente, testes no mar foram realizados utilizando o controlador que apresentou os melhores resultados no ambiente controlado, a fim de verificar seu desempenho em um ambiente real. Os testes mostraram que o controlador visual foi capaz de manter o veículo em frente aos marcos visuais artificiais e que o ganho adaptativo trouxe vantagens, principalmente por suavizar a movimentação do robô no início da missão.
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White, David Charles. "Synthesis of 3-Aryl-2-(2-aryl-2-oxoethyl)pyrido[2,3-d]-4(3H)pyrimidones and 3-Aryl-2-(2-arylethenyl)pyrido[2,3-d]-4(3H)pyrimidones as Potential Antiepileptic Drugs." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/46506.
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A series of 2-alkyl-3-arylpyrido[2,3-d]pyrimidones were synthesized for testing as
potential antiepileptic drugs. The goal was to achieve better neurological activity and/or
lower toxicity than displayed by a series of 2-alkyl-3-aryl-4(3H)-quinazolinones prepared
previously in our research group. From the pharmacological testing data of these target
compounds, we have found that the additional nitrogen at the C-8 position of the quinazolinone
framework increased the anticonvulsant activity. However, the neurological toxicity increased
as well. The anticonvulsant and neurotoxic activity seen in the variuos 2-alkyl side chains
and 3-aryl substituents incorporated into these new pyridopyrimidones was consistent with the
activity observed with the same substituents on the 4(3H)-quinazolinones. The 3-aryl group
consists of various ortho-substituted phenyl rings, while the 2-alkyl chain consists of a
2-(2-aryl-2-oxo)ethyl or 2-arylethenyl group.Master of Science
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Gordana, Ćetković. "Sinteza 2',3'- dideoksinukleozida." Phd thesis, Univerzitet u Novom Sadu, Tehnološki fakultet Novi Sad, 1998. https://www.cris.uns.ac.rs/record.jsf?recordId=71445&source=NDLTD&language=en.
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U radu je ostvarena višefazna transformacija D-ksiloze u pogodno funkcionalizovane derivate koji su kuplovanjem sa siliranim timinom selektivno dali nukleozide sa beta-konfiguracijom na anomernom centru. Takođe, u cilju sinteze nukleozida L-serije, ispitana je mogućnost izomerizacije nekih derivata D-šečera u odgovarajuće L-stereoizomere.Muitistep transformation of D-xylose to suitabte functional derivatives were achieved. Coupling of these derivatives with silylated thymine gave the nucleosides with beta-configuration on anomeric centre. In order to synthesis nucleosides of L-series, the possibility for isomerization of some kinds D-sugar derivatives in corresponding L-stereisomeric compounds, were investigatet, too.
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Huang, Xinyi. "Enzymatic Characterization of N-Acetyl-1-D-myo-inosityl-2-amino-2-deoxy-alpha-D-glucopyranoside Deacetylase (MshB)." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50947.
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Mycobacterium species, which contain the causative agent for human tuberculosis (TB), produce inositol derivatives including mycothiol (MSH). MSH is a unique and dominant cytosolic thiol that protects mycobacterial pathogens against the damaging effects of reactive oxygen species and is involved in antibiotic detoxification. Therefore, MSH is considered a potential drug target. The deacetylase MshB catalyzes the committed step in MSH biosynthesis by converting N-acetyl-1-D-myo-inosityl-2-amino-2-deoxy-alpha-D-glucopyranoside (GlcNAc-Ins) to 1-D-myo-inosityl-2-amino-2-deoxy-alpha-D-glucopyranoside (GlcN-Ins). In this dissertation, we present detailed functional analysis of MshB. Our work has shown that MshB is activated by divalent metal ions that can switch between Zn2+ and Fe2+ depending on environmental conditions, including metal ion availability and oxidative conditions. MshB employs a general acid-base catalyst mechanism wherein the Asp15 functions as a general base to activate the metal-bound water nucleophile for attack of the carbonyl carbon on substrate. Proton-transfer from a general acid catalyst facilitates breakdown of the tetrahedral intermediate and release of products. A dynamic tyrosine was identified that regulates access to the active site and participates in catalysis by stabilizing the oxyanion intermediate. Molecular docking simulations suggest that the GlcNAc moiety on GlcNAc-Ins is stabilized by hydrogen bonding interactions with active site residues, while a hydrophobic stacking interaction between the inositol ring and Met98 also appears to contribute to substrate affinity for MshB. Additional binding interactions with side chains in a hydrophobic cavity adjacent to the active site were suggested when the docking experiments were carried out with large amidase substrates. Together the results from this study provide groundwork for the rational design of specific inhibitors against MshB, which may circumvent current challenges with TB treatment.Ph. D.
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Cox, Glen Adam. "Towards the Synthesis of N-Acetyl-2-amino-2-deoxy-D-mannopyranose uronic acid (D-ManNAcA) and Derivatives." Youngstown State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1217344144.
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Gustavsson, Katarina. "Mathematical and Numerical Modeling of 1-D and 2-D Consolidation." Doctoral thesis, KTH, Numerical Analysis and Computer Science, NADA, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3497.
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A mathematical model for a consolidation process of a highlyconcentrated, flocculated suspension is developed.Thesuspension is treated as a mixture of a fluid and solidparticles by an Eulerian two-phase fluid model.W e characterizethe suspension by constitutive relations correlating thestresses, interaction forces, and inter-particle forces toconcentration and velocity gradients.This results in threeempirically determined material functions: a hystereticpermeability, a non-Newtonian viscosity and a non-reversibleparticle interaction pressure.P arameters in the models arefitted to experimental data.
A simulation program using finite difference methods both intime and space is applied to one and two dimensional testcases.Numer ical experiments are performed to study the effectof different viscosity and permeability models. The effect ofshear on consolidation rate is studied and it is significantwhen the permeability hysteresis model is employed.
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陳志榮 and Chi-wing Chan. "Design of 1-D and 2-D perfect reconstruction filter banks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31214915.
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Gößling, Sönke [Verfasser]. "2-D + 1-D ortsaufgelöste Modellierung von PEM-Brennstoffzellen / Sönke Gößling." München : Verlag Dr. Hut, 2019. http://d-nb.info/1188515810/34.
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Colin, François. "Simulation thermique du contact application aux mécanismes 2-D 3-D." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb375967860.
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Chan, Chi-wing. "Design of 1-D and 2-D perfect reconstruction filter banks /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20717908.
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Scott, Mark Andrew Ph D. Massachusetts Institute of Technology. "Ultra-rapid 2-D and 3-D laser microprinting of proteins." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79248.
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Thesis (Ph. D. in Electrical and Medical Engineering)--Harvard-MIT Program in Health Sciences and Technology, 2013.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 124-135).
When viewed under the microscope, biological tissues reveal an exquisite microarchitecture. These complex patterns arise during development, as cells interact with a multitude of chemical and mechanical cues in the surrounding extracellular matrix. Tissue engineers have sought for decades to repair or replace damaged tissue, often relying on porous scaffolds as an artificial extracellular matrix to support cell development. However, these grafts are unable to recapitulate the complexity of the in vivo environment, limiting our ability to regenerate functional tissue. Biomedical engineers have developed several methods for printing two- and three-dimensional patterns of proteins for studying and directing cell development. Of these methods, laser microprinting of proteins has shown the most promise for printing sub-cellular resolution gradients of cues, but the photochemistry remains too slow to enable large-scale applications for screening and therapeutics In this work, we demonstrate a novel high-speed photochemistry based on multi-photon photobleaching of fluorescein, and we build the fastest 2-D and 3-D laser microprinter for proteins to date. First, we show that multiphoton photobleaching of a deoxygenated solution of biotin-4-fluorescein onto a PEG monolayer with acrylate end-group can enable print speeds of almost 20 million pixels per second at 600 nanometer resolution. We discovered that the mechanism of fluorescein photobleaching evolves from a 2-photon to 3- and 4-photon regime at higher laser intensities, unlocking faster printing kinetics. Using this 2-D printing system, we develop a novel triangle-ratchet method for directing the polarization of single hippocampal neurons. This ability to determine which neurite becomes an axon, and which neuritis become dendrites is an essential step for developing defined in vitro neural networks. Next, we modify our multiphoton photobleaching system to print in three dimensions. For the first time, we demonstrate 3-D printing of full length proteins in collagen, fibrin and gelatin methacrylate scaffolds, as well as printing in agarose and agarose methacrylate scaffolds. We also present a novel method for 3-D printing collagen scaffolds at unprecedented speeds, up to 14 layers per second, generating complex shapes in seconds with sub-micron resolution. Finally, we demonstrate that 3-D printing of scaffold architecture and protein cues inside the scaffold can be combined, for the first time enabling structures with complex sub-micron architectures and chemical cues for directing development. We believe that the ultra-rapid printing technology presented in this thesis will be a key enabler in the development of complex, artificially engineered tissues and organs.
by Mark Andrew Scott.
Ph.D.in Electrical and Medical Engineering
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Colin, François. "Simulation thermique du contact : application aux mécanismes 2-D 3-D." Lyon, INSA, 1986. http://www.theses.fr/1986ISAL0023.
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Les performances des calculs des températures dans les mécanismes complexes en mouvement reposent sur l'emploi simultané de méthodes analytiques pour les pièces en mouvement et de méthodes numériques d'éléments finis pour les géométries compliquées. Une méthode hybride originale qui regroupe ces deux méthodes a été développée en 2 et 3 dimensions après un exposé détaillé des avantages et inconvénients des méthodes prises séparément. Une présentation particulière des résultats analytiques assure la compatibilité avec la méthode numérique. Des gains de temps appréciables ont été obtenus par rapport à un traitement numérique seul. Le logiciel réalisé a été optimisé pour réduire les temps de calculs. Avec des techniques spéciales de résolution de systèmes linéaires. Le logiciel comporte aussi des outils originaux d'aide à la mise en données et à l'exploitation des résultats
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Martišek, Karel. "Adaptive Filters for 2-D and 3-D Digital Images Processing." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-234150.
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Práce se zabývá adaptivními filtry pro vizualizaci obrazů s vysokým rozlišením. V teoretické části je popsán princip činnosti konfokálního mikroskopu a matematicky korektně zaveden pojem digitální obraz. Pro zpracování obrazů je volen jak frekvenční přístup (s využitím 2-D a 3-D diskrétní Fourierovy transformace a frekvenčních filtrů), tak přístup pomocí digitální geometrie (s využitím adaptivní ekvalizace histogramu s adaptivním okolím). Dále jsou popsány potřebné úpravy pro práci s neideálními obrazy obsahujícími aditivní a impulzní šum. Závěr práce se věnuje prostorové rekonstrukci objektů na základě jejich optických řezů. Veškeré postupy a algoritmy jsou i prakticky zpracovány v softwaru, který byl vyvinut v rámci této práce.
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Martišek, Karel. "Adaptivní filtry pro 2-D a 3-D zpracování digitálních obrazů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-234015.
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Práce se zabývá adaptivními filtry pro vizualizaci obrazů s vysokým rozlišením. V teoretické části je popsán princip činnosti konfokálního mikroskopu a matematicky korektně zaveden pojem digitální obraz. Pro zpracování obrazů je volen jak frekvenční přístup (s využitím 2-D a 3-D diskrétní Fourierovy transformace a frekvenčních filtrů), tak přístup pomocí digitální geometrie (s využitím adaptivní ekvalizace histogramu s adaptivním okolím). Dále jsou popsány potřebné úpravy pro práci s neideálními obrazy obsahujícími aditivní a impulzní šum. Závěr práce se věnuje prostorové rekonstrukci objektů na základě jejich optických řezů. Veškeré postupy a algoritmy jsou i prakticky zpracovány v softwaru, který byl vyvinut v rámci této práce.
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Guardado, Puentes Julian. "Trans diequatorially fused 3',3'-Diphenyl-2'-morpholinone derivatives of 2-Amino-2-deoxy-D-glucose." Scholarly Commons, 1985. https://scholarlycommons.pacific.edu/uop_etds/2113.
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The chemistry of amino sugar compounds has been studied in the last years in connection with the study of natural products, and many of them have been isolated. 57,17,18 Amino sugars play an important role in biochemistry, forming blocks of homo- and heteropolymers and complex molecules such as microbial polysaccharides, enzymes, gangliosides, glycoproteins, and antibiotics.
This research project had the purpose of preparing a derivative of 2-amino-2-deoxy-D-glucose, with a free hydroxyl group at the anomeric carbon, with the 4,6-positions blocked with the benzylidene cyclic acetal, and the 2,3-positions being blocked by a 3,3-diphenyl-2-morpholinone ring trans diequatorially fused to the amino sugar ring. The C-1 position was initially protected with a β-benzyl aglycon, which was expected to be removable selectively by catalytic hydrogenation. It was also hoped that we could optimize conditions for the synthesis of the morpholinone derivative. Selective cleavages of the blocking groups were to be investigated.
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Huppertz, Jürgen. "2-D-CMOS-Bildsensorik mit integrierter Signalverarbeitung." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960862846.
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Blencowe, Miles Peter. "Geometric field theories in D=2+1." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47362.
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Quiñonez, Fabiola Azanha. "Cristais fotônicos 2 D : projeto e fabricação." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278155.
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Orientador: Lucila Helena Deliesposte CescatoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
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Resumo: Nesta tese foi utilizado um programa baseado em elementos finitos para projetar cristais fotônicos bidimensionais, assim como foram desenvolvidos processos de litografia holográfica para gravação destas estruturas fotônicas em filmes de carbono amorfo hidrogenado, depositados sobre substratos de vidro. O projeto dos parâmetros geométricos das estruturas que apresentam um gap fotônico, numa dada região de interesse do espectro óptico, foi feito através do cálculo dos diagramas de bandas das estruturas, levando-se em consideração as dimensões e formas que possam ser fabricadas utilizando a técnica de litografia holográfica. Para gravação dos cristais fotônicos bidimensionais, com simetrias cúbica e hexagonal, foi utilizada a técnica de superposições sucessivas de padrões, gerados pela interferência de duas ondas planas (exposições holográficas), associadas à litografia do filme de carbono por plasma reativo (RIE ¿ Reactive Ion Etching)
Abstract: In this thesis, we employed a software based on finite element method to design two-dimensional photonic crystals, as well as we developed a holographic lithography process to record these photonic structures in amorphous carbon films, coated on glass substrates. In order to present a photonic band gap in a desired region of the optical spectrum, the geometrical parameters of the structures were defined by analyzing the calculated band diagram of the structures. Such definition takes into account the dimensions and forms of the structures that can be fabricated using techniques of holographic lithography. To record the two-dimensional photonic crystals, with cubic and hexagonal symmetries, we used the technique of successive superimposition of fringe patterns. The patterns were generated by the interference of two plane waves (holographic exposures), associated to the lithography of the carbon film by reactive ion etching
Mestrado
Propriedades òticas e Espectroscopia da Matéria Condensada ; Outras Inter. da Mat. Com Rad. e Part
Mestre em Física
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Bazito, Reinaldo Camino. "Novos tensoativos derivados da 2-D-glucosamina." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-12092006-143935/.
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Foram sintetizadas duas novas séries de tensoativos de açúcar derivados da 2-D-glucosamina: os metil 2-acilamido-2-deóxi-6-O-sulfonato-D-glucopiranosídeos de sódio (aniônicos) e os cloretos de metil 2-acilamido-2,6-dideóxi-6-trimetilamônio-D-glucopiranosídeos (catiônicos). Os tensoativos aniônicos foram obtidos pela acilação da 2-D-glucosamina com cloretos de acila (com 8, 12 e 16 carbonos), seguida pela metilação desses derivados com metanol em meio ácido, e posterior sulfatação dos metil glucosídeos com complexo trióxido de enxofre-piridina. Os tensoativos catiônicos foram obtidos pela tosilação dos metil glucosídeos, seguida pela quaternização com trimetilamina e troca do contra-íon tosilato por cloreto com resina de troca-iônica. Esses tensoativos apresentaram c.m.c. similares a de outros tensoativos iônicos de cadeia hidrofóbica de igual comprimento, mas energias livres de transferência do grupo polar para a micela muito mais favoráveis. Esse fato foi atribuído à formação de ligações de hidrogênio entre os grupos polares do tensoativo na micela, e à hidrofobicidade do açúcar. As micelas formadas apresentaram números de agregação maiores que os obtidos para outros tensoativos, provavelmente devido às interações atrativas entre os grupos polares.Two new sugar-based surfactant series were synthesized from 2-D-glucosamine: sodium methyl 2-acylamido-2-deoxi-6-O-sulfonate-D-glucopyranosides (anionic) and methyl 2-acylamido-2,6-dideoxi-6-trimethylamonium-D-glucopyranoside chlorides (cationic). The anionic surfactants were obtained by the acylation of 2-D-glucosamine with acyl chlorides (with 8, 12 and 16 carbons), followed by the methylation of these derivatives with methanol in acidic media, and the sulfation of the methyl glucosides with sulfur trioxide-pyridine complex. The cationic surfactants were obtained by the tosylation of methyl glucosides followed by the quaternization with trimethylamine and exchange of the tosylate contra-ion with chloride ions on an ion exchange resin. These surfactants showed c.m.c. similar to other ionic surfactants with equal hydrophobic chain lengths, but more favorable free energies of transfer of the polar head to the micelle. This fact is attributed to hydrogen bonding between the head groups of the surfactant in the micelle, and the hydrophobicity of the sugar moiety. The micelles of these surfactants showed aggregation numbers larger than those obtained for other surfactants, problably because of head-group attractive interactions.
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Bel, Olivier. "Gyromètre à quartz 2-D micro-usine." Besançon, 2001. http://www.theses.fr/2001BESA2010.
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Indispensables pour la navigation inertielle, les gyroscopes et les gyromètres font l'objet de nombreuses recherches, particulièrement dans le domaine microtechnique. Le travail de recherche proposé par SFIM industries (puis SAGEM à partir de 1999) consistait à démontrer le principe d'une mesure sur deux axes de la vitesse angulaire, principe dont le brevet est détenu par SFIM. Le principe d'usinabilité du quartz par attaque chimique de dispositifs de ce type ayant été démontré dans un avant-projet, il restait à valider le principe de fonctionnement par la réalisation du capteur et de l'électronique permettant de mesurer la vitesse angulaire. . .
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Suriamihardja, Dadang Ahmad. "2-D Horizontal and Vertical Nearshore Circulation." Kyoto University, 1989. http://hdl.handle.net/2433/138428.
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Menshov, Anton. "Novel single-source surface integral equations for scattering on 2-D penetrable cylinders and current flow modeling in 2-D and 3-D conductors." IEEE, 2012. http://hdl.handle.net/1993/23439.
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Accurate modeling of current flow and network parameter extraction in 2-D and 3-D conductors has an important application in signal integrity of high-speed interconnects. In this thesis, we propose a new rigorous single-source Surface-Volume-Surface Electric Field Integral Equation (SVS-EFIE) for magnetostatic analysis of 2-D transmission lines and broadband resistance and inductance extraction in 3-D interconnects. Furthermore, the novel integral equation can be used for the solution of full-wave scattering problems on penetrable 2-D cylinders of arbitrary cross-section under transverse magnetic polarization.
The new integral equation is derived from the classical Volume Electric Field Integral Equation (V-EFIE) by representing the electric field inside a conductor or a scatterer as a superposition of the cylindrical waves emanating from the conductor’s surface. This converts the V-EFIE into a surface integral equation involving only a single unknown function on the surface. The novel equation features a product of integral operators mapping the field from the conductor surface to its volume and back to its surface terming the new equation the Surface-Volume-Surface EFIE.
The number of unknowns in the proposed SVS-EFIE is approximately the square root of the number of degrees of freedom in the traditional V-EFIE; therefore, it allows for substantially faster network parameter extraction and solutions to 2-D scattering problems without compromising the accuracy. The validation and benchmark of the numerical implementation of the Method of Moment discretization of the novel SVS-EFIE has been done via comparisons against numerical results obtained by using alternative integral equations, data found in literature, simulation results acquired from the CAD software, and analytic formulas.
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Iwamoto, Hiromi [UNESP]. "Discretização do modelo de Yang-Mills 2-d com super-simetria N=2." Universidade Estadual Paulista (UNESP), 1993. http://hdl.handle.net/11449/132804.
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Iwamoto, H. (Hiromi). "Discretização do modelo de Yang-Mills 2-d com super-simetria N=2 /." São Paulo, 1993. http://hdl.handle.net/11449/132804.
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Hansen, Andrew. "Perception of Differences in Lip Profile between 2-D and 3-D." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4142.
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Past studies evaluating the esthetics of orthodontic treatment have been done using 2-D images. New 3-D imaging offers an improved, real-life representation of a subject. The purpose of this study was to determine how laypeople perceived differences in lip position (flat versus ideal lip fullness) in 2-D compared to 3-D.
3dMD images of 8 Caucasian subjects were adjusted to an ideal and flat lip position in 3-D and then in 2-D from the profile view. 2 surveys were created with paired ideal and flat images on the screen, either in 2-D or 3-D, and evaluators were asked to choose which image they preferred and by how much.
Evaluators were more likely to be neutral, and were less decisive of their preference in 3-D compared to 2-D. People might be less sensitive to small differences in facial soft tissue and esthetics than previous research in 2-D has led orthodontists to believe.
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Fakhr, Eslam Seyed Hamid. "Line broadening and shifting of the Raman Q branch in D¦2 and D¦2-He mixtures at low temperatures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0001/NQ41148.pdf.
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Appourchaux, Laurence. "Purification et propriétés des béta-D-galactosidases des N-acétyl-béta-D-glucosaminidases de Bifidobacterieum bifidum souche AA 2/2." Lille 1, 1989. http://www.theses.fr/1989LIL10164.
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Quatre activités exoglycosidasiques de bifidobacterium bifidum souche AA/22 ont été étudiées. Il s'agit des activités: béta-galactosidase, n-acétyl-beta-hexosaminidase, alpha-neuraminidase et alpha-fucosidase. Ces activités sont endo-cellulaires, leur extraction est réalisée par ultra-sons. Le schéma de purification suivi nous a permis d'obtenir six fractions. Trois fractions ne contenant qu'une seule activité : une alpha-neuraminidase et deux beta-galactosidases. Trois fractions possèdent chacune deux activités : une béta-galactosidase et une alpha-fucosidase ; une alpha-neuraminidase et une n-acétyl-béta-hexosaminidase ; une béta-galactosidase et une n-acétyl-béta-hexosaminidase. Toutes ces fractions ne révèlent qu'une seule bande en électrophorèse non dénaturante. Nous avons vérifié que celles-ci correspondaient bien aux activités suivies. Les deux activités béta-galactosidase purifiées séparément sont homogènes en électrophorèse dénaturante. Toutes ces activités ont des températures optimales comprises entre 40 et 48°C. Les pH optimaux sont compris entre 5 et 6. 5 et les masses moléculaires relatives déterminées en gel filtration sur Superose 6 varient de 97000 à 420000. Les pHi sont acides (4 a 5. 1). Seule une activité béta-galactosidase est sensible à l'EDTA et à l'EGTA, de plus Elle est activée par le calcium et le magnésium. Les paramètres enzymatiques des béta-galactosidases ont été réalisés sur le pNP-Gal et sur le lactose, ils mettent en évidence trois groupes de réactivité différente. Tous ces paramètres nous permettent de conclure que Bifido bacterium bifidum souche AA/22 possède au moins trois béta-galactosidases différentes. Nous n'avons pas prouvé que dans les fractions contenant deux activités, nous étions en présence d'un complexe enzymatique. Mais nous avons montré que la présence d'une activité influençait la réactivité de l'autre activité présente.
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Konuk, Baris. "Palmprint Recognition Based On 2-d Gabor Filters." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608138/index.pdf.
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In this thesis work, a detailed analysis of biometric technologies has been done and a new palmprint recognition algorithm has been implemented. The proposed algorithm
is based on 2-D Gabor filters. The developed algorithm is first tested on The Hong Kong Polytechnic University Palmprint Database in terms of accuracy, speed and template size. Then a scanner is integrated into the developed algorithm in order to acquire palm imagesin this way an online palmprint recognition system has been developed. Then a small palmprint database is formed via this system in Middle East Technical University. Results on this new database have also shown the success of the developed algorithm.
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Bent, Julian, Joanna Lee, and Tim Benson. "A T 2 D TDNMR study of skin." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186435.
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T2D TDNMR data is used to improve the assignment of the location of water in in-vitro pig skin. Whilst the corresponding 1d experiments report broad distributions of T2 and D respectively, two water components are resolved in the T2D data and are assigned
as intraand extra-cellular water by considering the peak intensities in; whole defatted skin, a dermatomed slice of the top 0.4mm (mostly epidermis) and the remaining sub layer (dermis). The relative proportion of fast relaxing/fast diffusing water is largest in the epidermis section (which has a close packed cellular structure) so is assigned as intra-cellular water. Whilst there is more slowly relaxing/slowly diffusing water in the dermis section (which has fewer cells within a collagen network) so this is assigned as extra-cellular water. The observation that intra-cellular water relaxes fastest, suggests that the skin cells contain more exchangeable species, through which the water can relax, than the extra-cellular network. This assignment is supported when resolution is lost on repeated freezing, i.e. the cell walls are broken. Resolution is also lost on increasing the diffusion time from 50 to 100 and 150ms. This is likely partly due to relaxation but also due to diffusion through the cell membranes during the experiment and gives a measure of the cell wall permeability.
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Petkou, Anastasios Christou. "Conformally invariant field theories in d > 2." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361616.
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Ciocarlie, Calin Schwarz John H. "D-Brane actions and N=2 supergravity solutions /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-06022004-125935.
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Daniel, Michael M. "Parallel algorithms for 2-D boundary value systems." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/12591.
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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.Includes bibliographical references (leaves 124-127).
by Michael M. Daniel.
M.S.
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Liu, Gau-Shin, and 劉高勳. "Fast Algorithms for the 2-D DCT and 2-D DFT." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/22426026844768511988.
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Chiu, Jiun-Ying, and 車俊英. "A Low Power 2-D DCT Chip Using Direct 2-D algorithm." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/96338602895187283685.
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碩士國立臺灣大學
電機工程學系
85
The discrete cosine transform (DCT) has been recognized as one of the keytechniques in image and video compression standards. Recently, these standardsare applied to the portable devices which are battery-powered. Thus, in oder toprolong the using time between recharging, it is imperative to develop a DCTmodule which consumes less power. In this thesis, a low power 8$\times$8 2-D DCT CMOS VLSI design based on direct 2-D approach is implemented. The direct 2-D method for the DCTreduces computational complexity by taking advantage of the attribute of complexnumber. According to this algorithm, a parallel distributed arithmetic (DA) architecture at reduced supply voltage is derived. Moreover, in the real circuit implementation of the chip, a hybrid-architecture adder of low power consumption is proposed. Also, a power-saving ROM and a low voltage two-port SRAM with sequentialaccess are designed. Both the adder and the memories are the main modules of the 2-D DCT chip to approach low power. In addition to these modules, some peripheralcircuits such as registers are also under the low power considerations. After that, the resultant 2-D DCT chip is realized by 0.6 $\mu$m single-poly double-metal techlnology. The goal of its throughput is set at 200 MHz in order to meet the requirement of the real-time HDTV signal processing. The power simulated by module is 228mW. Finally, the chip can run at 133MHz maximumly and consumes 138mW at 100MHz.
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Li, Yan-Sheng, and 李延昇. "Design of Highly Efficient VLSI Architecture for 2-D DWT and 2-D IDWT." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/63555366679415931815.
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碩士國立中正大學
資訊工程研究所
89
With the rapid progress of VLSI design technologies, many processors based on audio and image signal processing have been developed recently. In this thesis, we present a design methodology for the implementation of high-performance 2-D discrete wavelet transform (DWT) and inverse DWT (IDWT). By exploiting the multi-rate feature inherent in the algorithms, an effective schedule that interleaves all the row-wise and column-wise computations of different octaves onto three fundamental convolutional filters is proposed. Based on this computation schedule, very high efficient architectures can be synthesized. The resulting architectures can not only achieve fast computation time at less silicon cost due to nearly full hardware utilization, but they are also simple and modular, making them very suitable for VLSI implementation. Furthermore the proposed design methodology enables the design of the configurable architecture that can process both DWT and IDWT.
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Jacobs, David W. "Recognizing 3-D Objects Using 2-D Images." 1993. http://hdl.handle.net/1721.1/6796.
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We discuss a strategy for visual recognition by forming groups of salient image features, and then using these groups to index into a data base to find all of the matching groups of model features. We discuss the most space efficient possible method of representing 3-D models for indexing from 2-D data, and show how to account for sensing error when indexing. We also present a convex grouping method that is robust and efficient, both theoretically and in practice. Finally, we combine these modules into a complete recognition system, and test its performance on many real images.
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"2-D incompressible Euler equations." 2000. http://library.cuhk.edu.hk/record=b5890406.
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Chu Shun Yin.Thesis (M.Phil.)--Chinese University of Hong Kong, 2000.
Includes bibliographical references (leaves 63-65).
Abstracts in English and Chinese.
Acknowledgments --- p.i
Abstract --- p.ii
Introduction --- p.3
Chapter 1 --- Preliminaries --- p.8
Chapter 2 --- Singular Integrals --- p.15
Chapter 2.1 --- Marcinkiewicz Integral --- p.15
Chapter 2.2 --- Decomposition in cubes of open sets in Rn --- p.17
Chapter 2.3 --- Interpolation Theorem for Lp --- p.18
Chapter 2.4 --- Singular Integrals on homogeneous of degree 0 --- p.25
Chapter 3 --- Solutions to the Euler Equations --- p.36
Chapter 3.1 --- Existence and Uniqueness of smooth solutions for Euler Equations --- p.36
Chapter 3.2 --- Rate of Convergence and Decay in Time --- p.43
Chapter 3.2.1 --- Rate of Convergence --- p.43
Chapter 3.2.2 --- Lp Decay for Solutions of the Navier-Stokes Equations --- p.46
Chapter 3.3 --- Weak Solution to the Euler Equations --- p.48
Chapter 3.3.1 --- Weak Solution to the Velocity Formulation --- p.49
Chapter 3.3.2 --- Weak Solution to the Vorticity Formulation --- p.52
Bibliography --- p.63
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Mei, Hsing-Tai, and 梅興泰. "2-D Preliminary Analysis of RIP." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/43229816809731833591.
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碩士國立臺灣大學
土木工程學研究所
90
ABSTRACT Resistivity Image Profiling (RIP is called for short), is not only one of the technology with geophysics, but also plays an important role in geothermal and mineral exploration. As a result of many weak rock in geological structure of Taiwan, frequent rainfall and groudwater runoff. When tunnel excavating with broken belt forms a large number gush of water, it will cause irretrievable people and loss in money. Therefore, using RIP with drilling hole data can yet be regarded as a correct and good method. To plot the data from a 2-D imaging survey, the pseudosection contouring method is normally used. However the pseudosection gives a distorted picture of the subface, because the shapes of contours depend on the type of array used as well as the true subsurface resistivity, and there are many kinds of arrays in RIP method. Because of the above-mentioned, we have to discuss and introduce every kind of arrays with software RES2DMOD and RES2DINV (Loke, 1999) by resistivity model. On the other hand, a numerical technique of solving the potential distribution about a point source of current located in or on the surface of a half-space containing arbitrary 2-D conductivity distribution since 1979, so far, has fully developed. However, we have to correct the geometric factor (Loke, 2001) if running the lab. test with 2D plane analogue model. The reason is that the general formula assumed at a half-space and homogeneous subsurface, but the model of tests has boundary constrains in profiling direction in fact. So, we use cylindrical coordinate with Laplace equation to solve the potential function, furthermore to correct the geometric factor. After correction, they will contract until one range progressively, not become large with depth . Through 2-D plane analogue model test that sets several different topographic model, to expect to propose a simple operating sequence. By this study, it is a semi-good result to above mentioned method. We also hope that later generations can continue this study and develop more mature.
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shy, sean, and 施武陽. "2-D inverse problem of elastostatics." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/63433816930974813574.
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Chien, Hung-Ta, and 簡宏達. "2-D 2x2 Photonic Crystal Beamsplitter." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/89896117764666779141.
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碩士國立中央大學
光電科學研究所
92
In this wok, we propose two novel two-dimensional photonic crystal beamsplitters with two input ports and two output ports. The structure consists of two orthogonal-crossing line defects in square lattice. The intersection of two orthogonal photonic crystal waveguides was modified to control the splitting ratio of the electromagnetic waves. The photonic crystal beamsplitters with air-holes and dielectric pillars are studied. The mechanisms of the light splitting in the photonic crystal beamsplitters are discussed. The characterization of the Mach-Zehnder interferometers (intensity modulator) using the photonic crystal beamsplitters are investigated.
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Kolivoška, Viliam. "2-D simulations of electromigration processes." Master's thesis, 2008. http://www.nusl.cz/ntk/nusl-290786.
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6 Abstract In the presented thesis we introduce a computational model that can be used for 2-D and 3-D computer simulations of experiments in electrophoresis. The simulations are carried out by the aid of the finite element method (FEM). In particular, commercially available program Comsol Multiphysics 3.3 is employed. A general shape of continuity equation is chosen to express the mass, electric charge, momentum and energy conservation law. Diffusion, migration and convection terms are taken into account when formulating the mass conservation law. Both external (driving voltage) and internal (diffusion currents) terms are considered in the electric charge conservation law. Both constant voltage mode and constant current mode can be handled. A solvent is regarded as an incompressible Newtonian fluid. Both pressure-driven and electroosmotic flows can be taken into consideration. The heat convection as well as the heat diffusion is governed by the energy conservation law. Both strong and weak electrolytes (of any attainable valency) may be regarded as system constituents. Furthermore, the model can handle the ionic strength correction if desired. A task may be assigned either in Cartesian or cylindrical coordinates. The presented model was employed to solve four particular tasks. The first one inspects the...