Дисертації з теми "Perturbation effect"
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Lohmann, Ulrike, Leon Rotstayn, Trude Storelvmo, Andrew Jones, Surabi Menon, Johannes Quaas, Annica M. L. Ekman, Dorothy Koch, and Reto A. Ruedy. "Total aerosol effect: radiative forcing or radiative flux perturbation?" Copernicus Publications, 2010. https://ul.qucosa.de/id/qucosa%3A13832.
Повний текст джерелаPrentice, Jamie C. "The perturbation effect in wildlife systems : an emergent property of simple models." Thesis, University of York, 2012. http://etheses.whiterose.ac.uk/3233/.
Повний текст джерелаLilli, Markus. "The effect of a singular perturbation to a 1-d non convex variational problem." Berlin Logos-Verl, 2004. http://deposit.ddb.de/cgi-bin/dokserv?id=2752886&prov=M&dok_var=1&dok_ext=htm.
Повний текст джерелаLilli, Markus. "The effect of a singular perturbation to a 1-d non convex variational problem /." Berlin : Logos-Verl, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2752886&prov=M&dok_var=1&dok_ext=htm.
Повний текст джерелаHarmidy, Kevin. "Perturbation of host cell cytoskeleton by cranberry proanthocyanidin and its effect on enteric infections." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104671.
Повний текст джерелаLe fruit de la canneberge est depuis longtemps utilisé par la médecine traditionnelle dans le cadre d'infection urinaire, mais son mécanisme d'action reste mal connu. Récemment plusieurs études ont montré l'implication d'un composé majeur du fruit, le proanthocyanidine (CPAC), dans les propriétés antibactériennes et anti-infectieuses de la canneberge. Le travail présenté ici vise à évaluer l'effet du PAC sur les cellules épithéliales au cours de l'infection par deux bactéries intestinales : Salmonella Typhimurium et la souche d'Escherichia coli entéropathogène (ECEP). Nous avons montré par des techniques d'imagerie que le remodelage du cytosquelette d'actine des cellules hôtes, étape nécessaire à l'infection par les ECEP, était abolit en présence de CPAC, de même, une inhibition significative de l'infection de cellules HeLa par Salmonella Typhimurium est observée en présence du composé. L'absence d'effet du CPAC sur la prolifération bactérienne et sur la sécrétion de facteurs de virulence dans les deux systèmes expérimentaux suggère un impact du composé sur la permissivité des cellules hôtes. De façon concordante, nous avons montré un rôle critique du CPAC dans la polymérisation des filaments d'actine des cellules non-infectées. La phagocytose de particules inertes par une lignée macrophagique qui dépend d'un remodelage actif du cytosquelette est également inhibée par le CPAC, confirmant l'impact majeur du composé sur le fonctionnement cellulaire. Des expériences in vivo d'infection par Citrobater Rodentium (un modèle murin d'ECEP) n'ont pas permis de mettre en évidence d'effet significatif du CPAC sur l'incidence et la sévérité de la maladie malgré l'effet majeur observé in vitro sur les cellules épithéliales. L'ensemble de ces travaux apporte un nouvel éclairage sur l'effet du CPAC dans les interactions entre les pathogènes et les cellules hôtes, il souligne également les différences entre des systèmes expérimentaux in vitro et les mécanismes prenant place dans des organismes complexes in vivo. Des expériences supplémentaires prenant en compte différents paramètres comme le PH intestinal semblent nécessaires pour évaluer définitivement l'impact du CPAC sur les infections entériques.
Thompson, Hershell William. "The effect of visual perturbation in planning landing from a jump in adult humans /." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61195.
Повний текст джерелаResults from EMG analysis demonstrated a stable, global pattern of activation regardless of visual condition and independent of knowledge of the jump height. A generalized strategy of EMG activation was adequate for successful landing on stable height trials, but subjects developed a different default strategy for jumping at random height when inadequate visual update was provided. The prelanding EMG responses from the muscles recorded suggest that there are different roles for the muscles in preparing the body for ground impact. (Abstract shortened by UMI.)
Martinez, Katherine M. "Effect of Stance Symmetry on Perturbation-Induced Protective Stepping in Persons Poststroke and Controls." Diss., NSUWorks, 2016. https://nsuworks.nova.edu/hpd_pt_stuetd/57.
Повний текст джерелаHerman, Mark Steven. "Born-Oppenheimer Corrections Near a Renner-Teller Crossing." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/28200.
Повний текст джерелаPh. D.
Wilks, Theresa M. "Toroidal phasing of resonant magnetic perturbation effect on edge pedestal transport in the DIII-D tokamak." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47558.
Повний текст джерелаJohnston, Hannah Elizabeth. "Systems redox biology analysis of cancer." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31348.
Повний текст джерелаWhatham, Andrew. "The effect of optical or pharmacological perturbation of focus on refractive development and ocular growth in the common marmoset." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312637.
Повний текст джерелаAnsari, Mohammed Toseef. "Changes in coagulation, fibrinolysis, and endothelial perturbation markers in the lower limb venous blood associated with prolongedcramped sitting in healthy adult male volunteers in a simulation ofprolonged travel." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B31556991.
Повний текст джерелаWalker, Nathan Thomas. "A Density Functional Theory and Many Body Perturbation Theory Based Study of Photo-Excited Charge Separation in Doped Silicon Nanowires with Gold Leads: Toy Models for the Photovoltaic Effect." Thesis, North Dakota State University, 2020. https://hdl.handle.net/10365/31785.
Повний текст джерелаSusbielle, Guillaume. "Perturbation de la dynamique de l’hétérochromatine par des ligands synthétiques du petit sillon de l’ADN." Toulouse 3, 2006. http://www.theses.fr/2006TOU30109.
Повний текст джерелаThe satellite III sequences (SATIII) composing the pericentric regions of the X chromosome are the only alphoïd sequences found in Drosophila melanogaster. They are similar to those found near the centromeres of mammalian cells. Their structural characteristics, based on their biased, A•T rich, nucleotidic composition, make them good targets for different types of artificial and natural molecules. We propose to use the SAT III sequences as a model to study the histone code, the function of pericentric regions and as a tool to evaluate the pharmacological potential of diamidines. Our work with minor groove binding agents, allowed us to shed light on the functional role of topoisomerase II, a major target in anticancer and antiparasitic therapies, in the heterochromatin assembly process and in the antiproliferative mode of action of diamidines
Raum, Peter Thomas. "Exact Diagonalization Studies of Strongly Correlated Systems." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/96440.
Повний текст джерелаDoctor of Philosophy
Strongly correlated quantum many-body physics is a rich field that hosts a variety of exotic phenomena. By quantum many-body we mean physics that is concerned with the behavior of interacting particles, such as electrons, where the quantum behavior cannot be ignored. By strongly correlated, we mean when the interactions between particles are sufficiently strong such that they cannot be treated as a small perturbation. In contrast to weakly correlated systems, strongly correlated systems are much more difficult to solve. That is because methods that reduce the many-body problem to a single independent body problem do not work well. In this dissertation we use exact diagonalization, a method to computationally solve quantum many-body systems, to study two strongly correlated systems: the Hubbard model and the fractional quantum Hall effect.The Hubbard model captures the physics of many interesting materials and is the standard toy model. Originally developed with magnetic properties in mind, it has been extended to study superconductivity, topological phases, cold atoms, and much more. The fractional quantum Hall effect is a novel phase of matter that hosts exotic excitations, some of which may have applications to quantum computing.
Fridström, Richard. "Resonant magnetic perturbation effect on the tearing mode dynamics : Novel measurements and modeling of magnetic fluctuation induced momentum transport in the reversed-field pinch." Doctoral thesis, KTH, Fusionsplasmafysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-218052.
Повний текст джерелаQC 20171122
Iwata, Natsumi. "Nonlocal theory of relativistic ponderomotive force in high intensity lasers based on the phase space Lagrangian and the role in the interaction with various mediums." Kyoto University, 2014. http://hdl.handle.net/2433/188822.
Повний текст джерелаBaidolda, Farida. "Search for planetary influences on solar activity." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEO001/document.
Повний текст джерелаThe causes of solar variations and their impact on climatic environments have been andstill are the subject of large debate. The possible influence of planetary perturbations on thesolar cycles have also been recently the subject of multiples controverses. The goal of thepresent thesis is to provide some insight on this problem by a new computation of the planetaryperturbations on the Sun, at short, middle and and long time scales.At first, we describe our current understanding of the physical causes of the solar activityand their major observable manifestations, such as the sun spots records. We provide somehistorical background for the numerous records of solar activity proxies. We also review thedifferent approaches to explain the solar planetary relationships through an analysis of thepublished literature.The main purpose of the present work is to study the possible influence of the planetarygravitational perturbations on the solar cycles. In a first part, we analyse the short, middle andlong term solar activity behavior by using the quasiperiodic approximations provided by thefrequency map analysis method to determine the main periodicities of the solar cycles. Thisallows us to provide some reconstruction of the long timescale changes of solar activity variation.The reconstructed activity series are compared with the observed solar activity data and thelong term natural archives such as radioisotopes proxies. The reconstructed series still preservethe well recorded historical grand minima and maxima events and provide us some extendeddata for the study of the long timescale evolution of solar cycles.There has already been some attempts to explain the direct or partial influences of anexternal (e.g., the planets ) or an internal (e.g., its dynamo) effects on the solar changes. In thepresent work, we investigate the planetary tidal influence on solar cycle variations. We havedeveloped a realistic dynamical model for describing the tidal effect exerted by the perturbationof the planets of the Solar system on the deformation of the non-spherical Sun’s surface whichmay partially modulate its activity variations. The model is limited to the dynamical effects ofthe planets on the Sun and do not take account any physical interior process of the Sun. TheSun is considered as an homogeneous three axial non spherical body.The variations of the potential coefficients induced by the effects of body tides are com-puted, using the last INPOP planetary ephemerides and the long term solutions La2004. Thesemi-analytical expressions of the deformation coefficients of potential are derived. Thus, theestimations of the planetary tides effects of each planets and their combinations are comparedto the solar activity records and their reconstructed series. Hence, the correlations between thevariations of the deformation of Sun’s surface and its activity records are discussed
Vanderstraeten, Jacques. "Analyse de l'hypothèse de la perturbation des biorythmes par les champs magnétiques d'extrêmement basse fréquence: mécanismes possibles, impact en santé publique, protocoles de mise a l'épreuve." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209445.
Повний текст джерелаContexte :une association entre exposition prolongée aux champs magnétiques (CM) d’extrêmement basses fréquences (ELF) et risque sanitaire a été établie pour la leucémie infantile (CM 50/60 Hz de l’électricité, RR = 2,0 pour ≥ 0,4 µT d‘intensité moyennée dans le temps) et est suggérée pour le décès par maladie d’Alzheimer (CM 50/60 Hz, CM 16,7 Hz des voies ferrées pour 21 µT d’intensité moyennée dans le temps) et pour certaines hémopathies chez l’adulte (CM 16,7 Hz). Ces associations restent inexpliquées à ce jour. Sur base d’observations animales (effets des CM ELF sur la sécrétion de mélatonine) d’une part, et de la sensibilité magnétique confirmée des cryptochromes (régulateurs des biorythmes) d’autre part, il a été suggéré que ces associations puissent être dues à une perturbation des biorythmes par les CM ELF. Selon les instances internationales, une intensité > 1 mT est requise pour l’existence d’effets biologiques.
Objectifs et méthode :sur base d’une revue exhaustive de la littérature et de modèles théoriques reconnus, le présent travail développe certains mécanismes possibles pour un effet perturbateur des biorythmes par les CM ELF. L’impact en santé publique de cette hypothèse est ensuite évalué. Enfin, des protocoles sont proposés pour sa mise à l’épreuve, tenant compte des mécanismes envisagés.
Résultats :la possibilité existe d’une interaction des oscillations ELF de l’intensité et/ou de l’orientation du CM (somme vectorielle du CM ELF et du CM terrestre ou CMT) avec les cryptochromes rétiniens. Chez l’animal magnétosensible (dont le rongeur), une perturbation des biorythmes pourrait être consécutive à un mécanisme non spécifique de perturbation sensorielle. Toute observation animale pourrait donc ne pas être extrapolable à l’Homme. Chez ce dernier, une perturbation des biorythmes pourrait être causée par les oscillations de l’intensité du CM (peut- être dès < 100 µT d’intensité de CM ELF). Une telle perturbation pourrait aussi être causée par les variations spatiales de l’intensité du CMT qui existent dans l’environnement résidentiel (proximité de structures métalliques). Par ailleurs, dans l’éventualité de l’existence, chez l’Homme également, d’une sensibilité directionnelle basée sur les cryptochromes rétiniens, les oscillations de l’orientation du CM pourraient alors aussi interférer avec ces cryptochromes (peut-être dès ≤ 10 µT). Dans l’hypothèse où une telle interférence affecte les biorythmes, seules pourraient alors être concernées les oscillations dont l’amplitude atteint plusieurs degrés d’angle. Un tel mécanisme ne pourrait donc s’appliquer à la relation entre CM ELF et leucémie infantile que dans l’éventualité où les intensités les plus élevées (+ 1 à 2 SD) de CM ELF y jouent un rôle. Au cas où l’hypothèse de la perturbation des biorythmes par les CM ELF se voyait confirmée, d’autres troubles de santé seraient alors concernés et d’autres sources de CM seraient en cause, tels les CM statiques d’intensité variable émis par les lignes de transport électrifié. Les paramètres d’exposition considérés devraient inclure l’orientation relative CM ELF/CMT, mais aussi l’intensité locale du CMT (facteur à la fois déterminant et confondant dans la présente hypothèse). L’expérimentation animale devrait investiguer l’expression des clock genes. L’expérimentation humaine devrait investiguer les biorythmes chez l’enfant. Et l’épidémiologie devrait investiguer l’incidence de troubles liés à une perturbation des biorythmes en relation avec l’exposition aux CM ELF ainsi qu’aux variations locales de l’intensité du CMT.
Conclusions :malgré les incertitudes persistantes quant aux fonctions précises des cryptochromes de la rétine humaine et quant à l’exactitude des modèles théoriques qui décrivent les interactions entre CM et cryptochromes, certains mécanismes paraissent possibles pour une interaction entre CM ELF et biorythmes. En l’absence persistante d’alternative valide pour l’explication de l’association entre CM ELF et leucémie infantile, l’hypothèse de la perturbation des biorythmes par ces CM paraît devoir être investiguée plus avant, mais en tenant compte des variations locales d’intensité du CMT.
Background: An association between prolonged exposure to extremely low frequency (ELF) magnetic fields (MF) and health risk has been established for childhood leukemia (50/60 Hz MF of electricity, RR = 2.0 for ≥ 0.4 µT of time-averaged intensity) and is suggested for death by Alzheimer's disease (50/60 Hz MF, 16.7 Hz MF of railways at 21 µT of time-averaged intensity) and for some hematologic malignancies in adults (16.7 Hz MF). These associations remain unexplained so far. Based on animal studies (effects of ELF MF on melatonin secretion) on the one hand, and on the confirmed magnetic sensitivity of cryptochromes (regulators of biorhythms) on the other hand, it has been suggested that these associations may be due to a disruption of biorhythms by ELF MF. From current data, however, biological effects seem only possible at > 1 mT of intensity.
Objectives and methods: on the basis of an exhaustive literature review and with use of recognized theoretical models, this paper develops some possible mechanisms for disruption of biorhythms by ELF MF. The public health impact of this hypothesis is then evaluated. Finally, protocols are proposed for the testing of it, with taking into account the proposed mechanisms.
Results: an interaction seems possible between ELF oscillations of the intensity and/or the orientation of the ambient MF (the vector sum of both the ELF MF and the geomagnetic field or GMF) with retinal cryptochromes. In magnetosensitive animals (including rodents), disruption of biorhythms may then be secondary to a non-specific mechanism of sensory disturbance. All animal observation could therefore not be extrapolated to humans. In the latter, on his turn, a disruption of biorhythms may be caused by the oscillations of the MF intensity (perhaps from <100 µT of ELF MF intensity). Such disruption could also be caused by spatial variations of the intensity of the GMF that exist in residential environment (near steel structures). Moreover, in case of the existence in humans (like in animals) of a directional sensitivity based on retinal cryptochromes, then the oscillations of the MF orientation also could interfere with these cryptochromes (perhaps from ≤ 10 µT). In the event that such interference affects biorhythms, only oscillations of several degrees of amplitude would then be concerned. As a consequence, such a mechanism could apply to the relation between ELF MF and childhood leukemia only in the event that the highest MF intensities (Mean + 1-2 SD) also play a role in that relation. In the event the hypothesis of disruption of biorhythms by ELF MF is confirmed, other health problems would be concerned and other kind of MF would be involved, such as the static MF of variable intensity that are emitted by the lines of electrified transport. The considered exposure parameters should include the relative orientation of ELF MF and GMF, but also the local intensity of GMF (both determining factor and confounder in this case). Animal experiments should investigate the expression of clock genes. Human experimentation should investigate biorhythms in children. And epidemiology should investigate the incidence of disorders related to disruption of biorhythms in relation to exposure to ELF MF as well as to local variations in the intensity of the GMF.
Conclusions: Despite the persisting uncertainties about the precise functions of retinal cryptochrome as well as about the accuracy of the theoretical models that describe the interactions between MF and cryptochromes, some mechanisms seem possible for an interaction between ELF MF and biorhythms. In the persisting absence of valid alternative explanation for the association between childhood leukemia and ELF MF, the hypothesis of biorhythm disturbance by ELF MF deserves further investigation, however with taking into account local intensity variations of the GMF.
Doctorat en Sciences de la santé publique
info:eu-repo/semantics/nonPublished
Ennaji, Hasna Sara. "The effect of external perturbations on the reactive balance response of young and older women in a simulated real-world context: public transportation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Знайти повний текст джерелаGodongwana, Buntu. "Effect of nutrient momentum and mass transport on membrane gradostat reactor efficiency." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2149.
Повний текст джерелаSince the first uses of hollow-fiber membrane bioreactors (MBR’s) to immobilize whole cells were reported in the early 1970’s, this technology has been used in as wide ranging applications as enzyme production to bone tissue engineering. The potential of these devices in industrial applications is often diminished by the large diffusional resistances of the membranes. Currently, there are no analytical studies on the performance of the MBR which account for both convective and diffusive transport. The purpose of this study was to quantify the efficiency of a biocatalytic membrane reactor used for the production of enzymes. This was done by developing exact solutions of the concentration and velocity profiles in the different regions of the membrane bioreactor (MBR). The emphasis of this study was on the influence of radial convective flows, which have generally been neglected in previous analytical studies. The efficiency of the MBR was measured by means of the effectiveness factor. An analytical model for substrate concentration profiles in the lumen of the MBR was developed. The model was based on the solution of the Navier-Stokes equations and Darcy’s law for velocity profiles, and the convective-diffusion equation for the solute concentration profiles. The model allowed for the evaluation of the influence of both hydrodynamic and mass transfer operating parameters on the performance of the MBR. These parameters include the fraction retentate, the transmembrane pressure, the membrane hydraulic permeability, the Reynolds number, the axial and radial Peclet numbers, and the dimensions of the MBR. The significant findings on the hydrodynamic studies were on the influence of the fraction retentate. In the dead-end mode it was found that there was increased radial convective flow, and hence more solute contact with the enzymes/biofilm immobilised on the surface of the membrane. The improved solute-biofilm contact however was only limited to the entrance half of the MBR. In the closed shell mode there was uniform distribution of solute, however, radial convective flows were significantly reduced. The developed model therefore allowed for the evaluation of an optimum fraction retentate value, where both the distribution of solutes and radial convective flows could be maximised.
Chaput, Ludovic. "Compréhension de l'énantiosélectivité de la lipase B de Candida antarctica : étude par modélisation moléculaire et expérimentation." Phd thesis, Université de La Rochelle, 2012. http://tel.archives-ouvertes.fr/tel-00825876.
Повний текст джерелаLima, Neemias Alves de. "Expansão perturbativa regularizada para o efeito Kondo." Universidade de São Paulo, 1998. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-03062014-104535/.
Повний текст джерелаIn the last two decades the theory of electronic correlated systems has had an enormous progress, which has sustained the parallel development of the experimental research in heavy fermion systems. Given the complexity imposed by the strong correlations, several techniques appeared. The present work explores an extension of one of the oldest, the Numerical Renormalization Group (NRG), treating perturbatively the Kondo model for a magnetic impurity in a metallic host. It is well known that perturbative expansion of physical properties, like susceptibility, in terms of the exchange coupling diverges logarithmically near the Kondo temperature. The NRG approach for this consider the discrete transformation, T[HN] = HN+1, where {HN}, is a sequence of Hamiltonians. In this work we use an alternative procedure to regularize the expansion, using an analogous continuum transformation Tδz[HN(z)] = HN(z+δz), where z is an arbitrary parameter which generalizes the NRG logarithmic discretization. Unlike Wilson\'s procedure, we hope this new one can be easily applicable to more complex Hamiltonians, complementing the numerical diagonalization.
Zaballa, Ignacio. "Cosmological effects of the primordial curvature perturbation." Thesis, Lancaster University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485250.
Повний текст джерелаMcBride, Patrick M. "The Effect of Polarization and InGaN Quantum Well Shape in Multiple Quantum Well Light Emitting Diode Heterostructures." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/822.
Повний текст джерелаVon, Laue Lukas. "Transferts de protons par effet tunnel dans l'acide benzoique : le rôle des vibrations moléculaires." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10060.
Повний текст джерелаBarbet, Bruno. "Stimulations électrohydrodynamique et thermique de jets de liquide conducteur." Grenoble 1, 1997. http://www.theses.fr/1997GRE10062.
Повний текст джерелаGabriel, Christopher. "Effect of localized structural perturbations on dendrimer structure." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1155662110.
Повний текст джерелаGabriel, Christopher J. "Effect of localized structural perturbations on dendrimer structure." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1155662110.
Повний текст джерелаVaske, Charles J. "Prediction and expansion of biological pathways from perturbation effects /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2009. http://uclibs.org/PID/11984.
Повний текст джерелаCondeescu, Cezar. "Non-perturbative effects in string theory." Palaiseau, Ecole polytechnique, 2010. http://pastel.archives-ouvertes.fr/docs/00/56/57/62/PDF/Phd-thesis.pdf.
Повний текст джерелаWe study non-perturbative effects generated by Euclidean brane instantons in compactifications of Type I/II string theory with orientifolds and magnetized D-branes. The focus is on instantons which can generate corrections to the superpotential. A necessary condition is that the instantons have to wrap rigid cycles. We consider the compactification of Type I (IIB) on the T^6/Z_2xZ_2 orientifold with discrete torsion and magnetized branes. The instantons wrapping the same cycle as the exotic O-planes (required by the presence of discrete torsion) have the desired uncharged zero-mode structure in order to generate corrections to the superpotential. We build global models based on this orientifold where stringy instantons generate linear terms and mass terms in the superpotential. Typically, in string theory one computes a physical coupling from which one has to extract a holomorphic part in order to obtain the non-perturbative superpotential. Various non-holomorphic factors are absorbed into the Kähler potential and redefinitions of chiral fields and closed string moduli. We have derived these redefinitions in the context of toroidal (orientifold) compactifications of Type I with magnetized branes and continuous Wilson lines. Finally, we have considered global models with linear terms in the superpotential generated non-perturbatively. We have computed explicitly the non-perturbative superpotential for toroidal orientifolds. We show how to sum coherently over the various one-instanton contributions. The explicit models analyzed possessed a non-perturbative supersymmetric vacuum where the gauge group was broken and certain open-string moduli were stabilized
DEY, Ashis Kumar, Tadanori KITAMURA, and Tetsuro TSUJIMOTO. "PERTURBATIONS ALONG HEADCUT AND THEIR EFFECTS ON GULLY FORMATION." 土木学会, 2001. http://hdl.handle.net/2237/8640.
Повний текст джерелаGodavarty, Dinesh. "Effects of Perturbations on the Onset of Vortex Asymmetry." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin995905161.
Повний текст джерелаPomeroy, Neil B. "Multi-instantons and supersymmetric SU(N) gauge theories." Thesis, Durham University, 2002. http://etheses.dur.ac.uk/3757/.
Повний текст джерелаByrne, David Kevin. "Genetic and environmental perturbation effects on metabolic networks and engineering objectives." Thesis, Boston University, 2012. https://hdl.handle.net/2144/12304.
Повний текст джерелаPhenotypic variation is produced through a complex web of interactions between genes and the environment and determines whether a trait has the ability to respond to natural or artificial selection. In metabolism, these concerted interactions define how energy is supplied and distributed throughout the cell. Since metabolic engineers seek to use cellular processes to improve the synthesis of valuable biochemical substances, there is great interest among scientists and engineers alike in determining the relative importance of genetic and environmental factors. To study the environmental and genetic effects on metabolic engineering applications, I use constraint-based metabolic modeling to develop a computational framework that systematically simulates and analyzes extracellular and intracellular perturbations on the metabolism of three microorganisms: Escherichia coli, Saccharomyces cerevisiae, and Shewanella oneidensis. Media compositions and gene- deletion strains are designed to optimize single or multiple engineering objectives, such as the maximization of production rate, yield and purity, or the minimization of the economic cost of raw materials. I use the framework to evaluate the production of several industrially important chemical commodities such as acetate, D-lactate, hydrogen, ethanol, formate, and succinate. By evaluating over 435 million simulated conditions and using 36 engineering metabolic traits, I classify the resultant phenotypes into 10-30 dominant meta-phenotypes for each organism. The meta-phenotypes illustrate global phenotypic variation and highlight organism-specific differences in biological and engineering capabilities. I show biological causality of high-performance engineering phenotypes and make available a web-based tool that was developed to permit public queries and visualization of optimal engineering designs and resultant metabolic pathway activities. Finally, I discuss relationships between engineering traits and phenotypes, trade-offs among multiple engineering objectives, and differences in phenotypic sensitivities that depend on perturbation type. Given the increasing number of sequenced genomes, model accuracy and available computing power, it is foreseeable that the developed framework can be extended to query a growing range of organisms, phenotypic variability, engineering applications and biological insights.
Iafelice, Pasquale Luca <1980>. "Perturbative and non perturbative effects in the Standard Model and orbifolded ADS/CFT based theories." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/844/.
Повний текст джерелаPritzel, Alexander. "Non-perturbative effects in field theory and gravity." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-177157.
Повний текст джерелаForeman, Alan Dean. "Determining the effects of ocean perturbations on marine phytoplankton assemblages." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/114369.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 34-35).
The ocean provides a dynamic, constantly changing environment for marine phytoplankton. Understanding the effects of these changes on phytoplankton assemblages is fundamental when trying to anticipate future responses of primary producer's community to long-term environmental changes. In this study, artificial perturbation experiments were successfully performed on natural assemblages of phytoplankton to simulate conditions consistent with ocean acidification and North Pacific Subtropical Gyre (NPSG) upwelling patterns. These experiments demonstrated the feasibility and value of such perturbations in studying phytoplankton responses to environmental forcing.
by Alan D. Foreman.
S.B.
Schneider, Steven Philip Liepmann H. W. Liepmann H. W. "Effects of controlled three-dimensional perturbations on boundary layer transition /." Diss., Pasadena, Calif. : California Institute of Technology, 1989. http://resolver.caltech.edu/CaltechETD:etd-02142007-094214.
Повний текст джерелаCurtsdotter, Alva. "Extinctions in Ecological Communities : direct and indirect effects of perturbation on biodiversity." Doctoral thesis, Linköpings universitet, Teoretisk Biologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108906.
Повний текст джерелаMorais, Maria Helena Moreira. "The effect of secular perturbations and mean motion resonances on Trojan dynamics." Thesis, Queen Mary, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392148.
Повний текст джерелаMiller, Emily Michele. "Effects of Obesity on Balance Recovery in Response to Small Postural Perturbations." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35465.
Повний текст джерелаMaster of Science
Foles, Ana Catarina das Neves. "MPPT study from a solar photovoltaic panel according to perturbations induced by shadows." Master's thesis, Universidade de Évora, 2017. http://hdl.handle.net/10174/22071.
Повний текст джерелаChu, Chengjin, Andrew R. Kleinhesselink, Kris M. Havstad, Mitchel P. McClaran, Debra P. Peters, Lance T. Vermeire, Haiyan Wei, and Peter B. Adler. "Direct effects dominate responses to climate perturbations in grassland plant communities." NATURE PUBLISHING GROUP, 2016. http://hdl.handle.net/10150/617187.
Повний текст джерелаEkwudo, Millicent Nkiruka. "Effects of Respiratory Perturbations on Aging and Healthspan in Daphnia magna." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3903.
Повний текст джерелаVardanyan, Alla. "Perturbation of heavy metal homeostasis and its effects on fertility in Drosophila melanogaster /." Zürich, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000278358.
Повний текст джерелаBirman, Michael, Tatyana Suslina, and tanya@petrov stoic spb su. "Threshold Effects near the Lower Edge of the Spectrum for Periodic." ESI preprints, 2001. ftp://ftp.esi.ac.at/pub/Preprints/esi992.ps.
Повний текст джерелаSzewc, Wojciech. "Theory and simulation of scanning gate microscopy : applied to the investigation of transport in quantum point contacts." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-00876522.
Повний текст джерелаBhattacharya, Atri, Rikard Enberg, Yu Seon Jeong, C. S. Kim, Mary Hall Reno, Ina Sarcevic, and Anna Stasto. "Prompt atmospheric neutrino fluxes: perturbative QCD models and nuclear effects." SPRINGER, 2016. http://hdl.handle.net/10150/622473.
Повний текст джерелаSiegel, Ethan R. "Cosmological perturbations and their effects on the universe from inflation to acceleration /." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013795.
Повний текст джерела