Dissertations / Theses on the topic 'Nuclear magnetic resonance; rock mechanics'
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Ronan, Leah L. "An NMR investigation of pore size and paramagnetic effects in synthetic sandstones /." Connect to this title, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0198.
Full textRonan, Leah L. "An NMR investigation of pore size and paramagnetic effects in synthetic sandstones." University of Western Australia. School of Oil and Gas Engineering, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0198.
Full textTrevizan, Willian Andrighetto. "Nuclear magnetic resonance and digital rock in oil industry: well logging applications." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-10082017-113902/.
Full textNeste trabalho são discutidas técnicas de Ressonância Magnética Nuclear (RMN) aplicadas à avaliação de formações por meio da perfilagem de poços pela indústria de óleo e gás. São apresentados os conceitos básicos para processamento e interpretação dos dados de RMN, e desenvolvida uma metodologia para determinação da relaxatividade superficial em poço. O método consiste em um algoritmo de processamento de dados de diffusion editing, que permite a obtenção da relaxatividade superficial em condições próximas as encontradas na perfilagem de poços de petróleo (em relação à disponibilidade de dados e nível de ruído). Para níveis moderados de ruído, as relaxatividades mais baixas (menores que 10μm/s) podem ser determinadas através das medidas de difusão por RMN, enquanto valores mais altos (∼30μm/s) podem ser separados dos intermediários. Aplicações em dados de perfilagem ainda requerem técnicas de redução de ruído como aquisições estacionárias em poço ou empilhamento de dados ao longo de um intervalo de profundidades. Entretanto, o método possibilita uma forma de converter as distribuições de T2 em distribuições de tamanhos de poros ainda em poço, antes que as amostras sejam enviadas para o laboratório em análises de rotina. Além da perfilagem, foi desenvolvido também uma aproximação para a equação de difusão com condições de contorno absortivas, através de equações de taxas. A forma das taxas de transição permite o desenvolvimento de metodologias simples para obtenção dos dados de RMN através de imagens dos poros das rochas. As taxas de transição podem ser utilizadas também para a modelagem de outros fenômenos que envolvam difusão, como fenômenos de troca entre poros ou entre sítios com diferentes valores de relaxação.
Damion, Robin A. "Grassmann variables and pseudoclassical Nuclear Magnetic Resonance." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-214290.
Full textAlhwety, Nader H., Nawaf I. Sayedakram, Igor Shikhov, and Christoph H. Arns. "Rock-typing of laminated sandstones by nuclear magnetic resonance in the presence of diffusion coupling: Rock-typing of laminated sandstones by nuclear magnetic resonance in the presence of diffusion coupling." Diffusion fundamentals 22 (2014) 1, S. 1-7, 2014. https://ul.qucosa.de/id/qucosa%3A13474.
Full textSamsonov, Sergey A., Stephan Theisgen, Thomas Riemer, Daniel Huster, and M. Teresa Pisabarro. "Glycosaminoglycan Monosaccharide Blocks Analysis by Quantum Mechanics, Molecular Dynamics, and Nuclear Magnetic Resonance." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-147183.
Full textAlhwety, Nader H., Nawaf I. Sayedakram, Igor Shikhov, and Christoph H. Arns. "Rock-typing of laminated sandstones by nuclear magnetic resonance in the presence of diffusion coupling." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-178510.
Full textMirijanian, James Julian. "Techniques to Characterize Vapor Cell Performance for a Nuclear-Magnetic-Resonance Gyroscope." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/724.
Full textUrban, Jeffry Todd. "Nuclear magnetic resonance studies of quadrupolar nuclei and dipolar field effects." Berkeley, Calif. : Oak Ridge, Tenn. : Lawrence Berkeley National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/836811-joXo6p/native/.
Full textPublished through the Information Bridge: DOE Scientific and Technical Information. "LBNL--56768" Urban, Jeffry Todd. USDOE Director. Office of Science. Office of Basic Energy Sciences (US) 12/21/2004. Report is also available in paper and microfiche from NTIS.
Sunter, Katherine Margaret. "Secondary structure determination of insect neuropeptides using high-resolution nuclear magnetic resonance and various molecular mechanics calculations." Master's thesis, University of Cape Town, 1996. http://hdl.handle.net/11427/17558.
Full textInsect neuropeptides play a vital role in the hormone release processes associated with insect flight Elucidation of the metabolic flight pathways requires a knowledge of the peptide secondary structure to allow predictions to be made regarding hormone-receptor binding processes. The three insect neuropeptides under investigation were taken from the corpora cardiaca of the migratory locust (Locusta migratoria) and belonged to the Lom peptide series - Lom-AKH-I, II and Ill. The secondary structure of these hormones was investigated using high-resolution nuclear magnetic resonance (NMR) techniques and various molecular mechanics computations. The interproton distances and φ torsion angles obtained from the NMR data were used to constrain the peptides in subsequent Monte Carlo and molecular dynamics (simulated annealing) calculations. The results of these calculations indicated that Lom-AKH-I and Lom-AKH-III adopt a definite structure in d⁶-DMSO solution, while Lom-AKH-II appeared to be fluctional with a minimum of three structures being required to satisfy the experimental data. Lom-AKH-I and ill were shown to adopt a loose open turn structures stabilised by the presence of a single hydrogen bond. Both had an additional concave structure with hydrophobic clustering on the convex surface of the molecule. The results suggest that Lom-AKH-I and Lom-AKH-III are more reactive than Lom-AKH-II. These predictions are in agreement with literature results obtained for Lom-AKH-I and II for lipid mobilisation and phosphorylase activation. However, when measured against cAMP production, Lom-AKH-II has higher activity. Insufficient literature was available to make structure/activity comparisons for Lom-AKH-III.
Lazariev, Andrii. "A quantum mechanics-based approach for optimization of metabolite basis-sets : application to quantitation of HRMAS-NMR signals." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00843311.
Full textGuillon, Valentin. "Dispersion en milieux poreux insaturés : modélisations et mesures RMN de distributions de vitesse." Phd thesis, Université d'Avignon, 2012. http://tel.archives-ouvertes.fr/tel-00853660.
Full textAl-Ghamdi, Ali. "Calibrating NMR response to capillary pressure curves in fine grained lithologies: Pretty Hill Formation, Otway Basin." Thesis, 2006. http://hdl.handle.net/2440/69452.
Full textThesis (M.Sc.(Petrol.G&G.)) -- University of Adelaide, Australian School of Petroleum, 2006
Das, Ranabir. "Developments In Quantum Information Processing By Nuclear Magnetic Resonance." Thesis, 2004. http://etd.iisc.ernet.in/handle/2005/1326.
Full textChan, Michael. "Spectroscopic Analysis of Resin-Bound Peptides: Glutathione and FK-13." Thesis, 2014. http://hdl.handle.net/10012/8227.
Full textSegnorile, Héctor Hugo. "Estudio de la evolución de las coherencias y procesos irreversibles en un sistema observado bajo bajo la influencia de la red, utilizando técnicas de RMN de protones en cristales líquidos nemáticos /." Doctoral thesis, 2010. http://hdl.handle.net/11086/143.
Full textEn este trabajo se estudia, bajo un tratamiento cuántico completo, la dinámica de la interacción entre un sistema observado con otro no-observado (y no-controlado), con un enfoque de sistema cuántico abierto. El aporte original consiste en mantener esta visión en toda la escala temporal del operador de evolución. Esto brinda una clara distinción y comprensión de los procesos de dinámica Liouvilliana aislada, decoherencia cuántica adiabática, decoherencia cuántica y relajación. Esto lleva, como contribución original, al entendimiento de la irreversibilidad introducida por la decoherencia cuántica como un concepto local del sistema observado, con origen en el tratamiento cuántico del ambiente, que permite evolucionar al estado del sistema hacia el quasi-equilibrio. Se concluye que este estado de quasi-equilibrio es parte de la caracterización de la dinámica cuántica completa, como un estadio intrínseco de la misma, que finaliza con la termalización del sistema observado bajo relajación. Se aplican estas ideas al estudio del sistema de espines de los protones en los cristales líquidos nemáticos con Resonancia Magnética Nuclear, realizando experimentos y cálculos numéricos desde primeros principios, sin aproximaciones. Además, se diseña y construye un espectrómetro de RMN, para prestaciones de técnicas de pulsos avanzadas, con control de temperatura.
In this work we study the dynamics of the interaction between an observed and a non-observed (and uncontrolled) system, by introducing a full-quantum approach, in which the observed system is considered an open quantum system. The originality of the proposal resides in involving this quantum view along the whole timescale of the dynamics. This treatment provides insight on the different dynamical processes involved, allowing to distinguish the Liouvillian dynamics of an isolated system, adiabatic decoherence, quantum decoherence and relaxation. Through this treatment we could also identify the irreversibility introduced by quantum decoherence as a local concept of the observed system, but originated in the quantum treatment of the environment or non-observed system, which allows the evolution of the quantum state towards the quasi-equilibrium description. This description is part of the complete characterization of the quantum dynamics, as an intrinsic state of the system, which culminates with the thermalization of the observed system with the lattice, driven by relaxation processes. These ideas were applied in the study of the proton spin system of a nematic liquid crystal with Nuclear Magnetic Resonance (NMR) technics, including experiments and numerical calculations from first principles, which need no approximations. In addition, an NMR spectrometer was constructed with facilities for advanced pulsed sequences and temperature control.
Héctor Hugo Segnorile.
Gopinath, T. "Quantum Information Processing By NMR : Quantum State Discrimination, Hadamard Spectroscopy, Liouville Space Search, Use Of Geometric Phase For Gates And Algorithms." Thesis, 2007. http://hdl.handle.net/2005/1078.
Full textAlvarez, Gonzalo Agustín. "Decoherencia en sistemas de espines interactuantes en RMN." Doctoral thesis, 2007. http://hdl.handle.net/11086/105.
Full textEn esta tesis usamos la ecuación maestra cuántica generalizada de Lioville von Neumann para resolver la dinámica de sistemas de muchos espines interactuando con un baño de espines. También obtuvimos la dinámica de espines dentro del formalismo de Keldysh. Ambos métodos con idénticas soluciones juntos, nos posibilitaron realizar predicciones que concuerdan con las observaciones de experimentos de RMN. Los resultados, fueron usados para la caracterización molecular, el desarrollo de nuevas metodologías numéricas y el control de dinámica cuántica en implementaciones experimentales. Aún más importante, ha sido el surgimiento de interpretaciones físicas fundamentales de la dinámica cuántica de sistemas cuánticos abiertos tales como la manifestación de una transición de fase en la dinámica cuántica inducida por el ambiente. El control de sistemas cuánticos abiertos tiene una relevancia fundamental en campos que van desde el procesamiento de la información cuántica hasta la nanotecnología. Típicamente, el sistema cuya dinámica coherente se desea manipular, interactúa con un ambiente que suavemente degrada su dinámica cuántica. Es así que el entendimiento preciso de los mecanismos internos de este proceso, llamado decoherencia, es crítico para el desarrollo de estrategias para el control de la dinámica cuántica. En esta tesis usamos la ecuación maestra cuántica generalizada de Liouville-von Neuman para resolver la dinámica de sistemas de muchos espines interactuando con un baño de espines. También obtuvimos la dinámica de espines dentro del formalismo de Keldysh. Ambos métodos nos llevaron a idénticas soluciones y juntos nos dieron la posibilidad de realizar numerosas predicciones que concuerdan con las observaciones de experimentos de Resonancia Magnética Nuclear. Estos resultados son usados para la caracterización molecular, el desarrollo de nuevas metodologías numéricas y el control de la dinámica cuántica en implementaciones experimentales. Pero aún más importante es el surgimiento de interpretaciones físicas fundamentales de la dinámica cuántica de sistemas cuánticos abiertos, tales como la manifestación de una transición de fase dinámica cuántica inducida por el ambiente.
Gonzalo Agustín Alvarez.
Ghosh, Arindam. "Quantum Information Processing By NMR : Relaxation Of Pseudo Pure States, Geometric Phases And Algorithms." Thesis, 2006. http://hdl.handle.net/2005/454.
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