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Rozprawy doktorskie na temat „Drift current”

Autor: Grafiati

Data publikacji: 9 listopada 2024

Data aktualizacji: 31 lipca 2025

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1

Ridler, Emma Louise. "Wave-current interactions and drift velocities over rippled beds." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624706.

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2

Stephens, Kenneth Frank. "Space-Charge Saturation and Current Limits in Cylindrical Drift Tubes and Planar Sheaths." Thesis, University of North Texas, 2000. https://digital.library.unt.edu/ark:/67531/metadc2598/.

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Space-charge effects play a dominant role in many areas of physics. In high-power microwave devices using high-current, relativistic electron beams, it places a limit on the amount of radiation a device can produce. Because the beam's space-charge can actually reflect a portion of the beam, the ability to accurately predict the amount of current a device can carry is needed. This current value is known as the space-charge limited current. Because of the mathematical difficulties, this limit is typically estimated from a one-dimensional theory. This work presents a two-dimensional theory for ca

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3

Gates, Dallas Cody. "Behavior of Flotsam in the California Current System Utilizing Surface Drift of RAFOS Floats." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17371.

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The patterns of surface drift of eighty-nine undrogued RAFOS floats in the California Current System have been studied. The floats were launched in the California Undercurrent during 19922010 and were tracked by the ARGOS system when they surfaced at the end of their subsurface mission. The surface drift of these floats was typically equatorward in the California Current. However, some floats moved poleward into the Subpolar Gyre, and others drifted westward into the North Equatorial Current. The duration of surface trajectories varied from as short as 11 days to as long as 280 days. Observati

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4

Kovac, Urban. "3D drift diffusion and 3D Monte Carlo simulation of on-current variability due to random dopants." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/2309/.

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In this work Random Discrete Dopant induced on-current variations have been studied using the Glasgow 3D atomistic drift/diffusion simulator and Monte Carlo simulations. A methodology for incorporating quantum corrections into self-consistent atomistic Monte Carlo simulations via the density gradient effective potential is presented. Quantum corrections based on the density gradient formalism are used to simultaneously capture quantum confinement effects. The quantum corrections not only capture charge confinement effects, but accurately represent the electron impurity interaction used in prev

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5

Engelbrecht, Nicholas Eugéne. "On the development and applications of a three-dimensional ab initio cosmic-ray modulation model / Nicholas Eugéne Engelbrecht." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8735.

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A proper understanding of the effects of turbulence on the diffusion and drift of cosmic-rays in the heliosphere is imperative for a better understanding of cosmic-ray modulation. This study presents an ab initio model for cosmic-ray modulation, incorporating for the first time the results yielded by a two-component turbulence transport model. The latter model is solved for solar minimum heliospheric conditions, utilizing boundary values chosen in such a way that the results of this model are in fair to good agreement with spacecraft observations of turbulence quantities, not only in the eclip

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6

Yamamoto, Kazuhiro. "Excitation of High-m Poloidal ULF Waves in the Inner Magnetosphere during Geomagnetic Storms and Substorms: Importance of Radial Gradient of Proton Distributions in Drift-Bounce Resonance." Kyoto University, 2020. http://hdl.handle.net/2433/253099.

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Chilton, Kristin Danielle. "Terrigenous Grain-Size Record of the Newfoundland Ridge Contourite Drift, IODP Site U1411: The First Physical Proxy Record of North Atlantic Abyssal Current Intensity during the Eocene-Oligocene Transition." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/83539.

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Atlantic Meridional Overturning Circulation (AMOC) is a vital process that transfers heat and nutrients throughout the world's oceans, helping to regulate global climate and support marine ecosystems. The timing and nature of the shift to modern AMOC, and especially to deep-water formation in the North Atlantic, has been a topic of ongoing study, with the Eocene-Oligocene Transition (EOT, ~34 Ma) as a potential focal point of this shift. However, the role played by abrupt EOT cooling and Antarctic glaciation in North Atlantic circulation remains unclear. Improved constraints on Paleogene circu

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8

Ahmed, Mustafa M. Abdalla. "Alternating-Current Thin-Film Electroluminescent Device Characterization." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-233432.

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Jádrem této disertační práce bylo studovat optické a elektrické charakteristiky tenkovrstvých elektroluminiscenčních součástek řízených střídavým proudem (ACTFEL) a zejména vliv procesu stárnutí luminiforů na jejich optické a elektrické vlastnosti. Cílem této studie měl být příspěvek ke zvýšení celkové účinnosti luminoforů, vyjádřené pomocí jasu, účinnosti a stability. Vzhledem k tomu, že současnou dominantní technologií plochých obrazovek je LCD, musí se další alternativní technologie plošných displejů porovnávat s LCD. Výhodou ACTFEL displejů proti LCD je lepší rozlišení, větší teplotní rozs

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9

Church, John Casey. "Topics in longshore currents." Thesis, Monterey, Calif. : Naval Postgraduate School, 1993. http://catalog.hathitrust.org/api/volumes/oclc/29749880.html.

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10

Cure, Marcel Serge. "Langmuir circulation : a side-scan sonar study of mixing in Loch Ness." Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240617.

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11

Brocchini, Maurizio. "Flows with freely moving boundaries : the swash zone and turbulence at a free surface." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336872.

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12

Wetind, Ruben. "Two-phase flows in gas-evolving electrochemical applications." Doctoral thesis, Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3223.

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13

Luckas, Jennifer. "Electronic transport in amorphous phase-change materials." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00743474.

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Les matériaux à changement de phase montrent la combinaison exceptionnelle d'un contraste énorme dans leurs propriétés physiques entre la phase amorphe et cristalline allié à une cinétique de changement de phase extrêmement rapide. La grande différence en résistivité permet leur application dans les mémoires numériques. De plus, cette classe de matériaux montre dans leur état vitreux des phénomènes de transport électronique caractéristiques. Le seuil de commutation dénote la chute de la résistivité dans l'état amorphe au delà d'un champ électrique critique. Le phénomène de seuil de commutation

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14

Yang, Xingyu. "Manipulating the inverse Faraday effect at the nanoscale." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS219.

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Le magnétisme induit par la lumière décrit l'effet par lequel un matériau est magnétisé par une impulsion optique. Dans les matériaux transparents, la magnétisation induite optiquement peut être réalisée directement par la lumière polarisée circulairement. Parfois, dans les matériaux métalliques, ce type de magnétisation existe également en raison du trajet solénoïdal microscopique des électrons entraînés par la lumière polarisée circulairement. Dans certains cas, la lumière crée des courants de dérive continus circulants macroscopiques, qui induisent également une magnétisation continue dans

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15

Johnson, Charley R. "Migration of Dredged Material Mounds: Predictions Based on Field Measurements of Waves, Currents, and Suspended Sediments, Brunswick, GA." Thesis, Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04082005-145658/unrestricted/johnson%5Fcharley%5Fr%5F200505%5Fmast.pdf.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2005.<br>F. Michael Saunders, Ph.D., Committee Member ; Kevin Haas, Ph.D., Committee Member ; Paul A. Work, Ph.D., Committee Chair. Includes bibliographical references.

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16

Boyle, Patrick Ryan. "Cenozoic Variations in the Deep Western Boundary Current as Recorded in the Seismic Stratigraphy of Contourite Drifts, Newfoundland Ridge, Offshore Canada." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/51850.

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A contourite drift complex on the J-Anomaly Ridge (JAR) and Southeast Newfoundland Ridge (SENR), offshore eastern Canada, records an extensive archive of North Atlantic circulatory and sedimentary dynamics formed under the influence of the Deep Western Boundary Current (DWBC). Seismic-reflection profiles constrained by drill sites from IODP Expedition 342 are used to map the spatial and temporal distribution of contourite sedimentation and to evaluate the Cenozoic history of the DWBC within a preexisting climatic framework. This study indicates three phases of sedimentation termed here Pre-Con

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17

Sytova, Elizaveta. "Modeling of Iter and Asdex Upgrade detached plasmas using the Solps-Iter code with drifts and currents." Thesis, Aix-Marseille, 2020. http://www.theses.fr/2020AIXM0098.

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Les principaux objectifs de cette thèse sont :* analyser les mécanismes déterminant l’équilibre rétention / fuite pour l’Azote et le Néon dans le régime de plasma détaché du divertor;* comparer l’efficacité du piégeage relatif aux fuites pour l’Azote et le Néon ainsi que pour les divertors des tokamaks ASDEX-Upgrade et ITER.Pour ce faire, le package de modélisation de code SOLPS-ITER a été développé et utilisé. Dans un premier temps, la précision de la modélisation des impuretés dans SOLPS-ITER a été augmentée en introduisant des formulations analytiques plus précises du frottement et des term

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18

Dunn, Shane Christopher. "Miocene Contourite Deposition (along-slope) near DeSoto Canyon, Gulf of Mexico: A Product of an Enhanced Paleo-Loop Current." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6494.

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A Neogene contourite depositional system was identified and mapped along the DeSoto Slope in the northeastern Gulf of Mexico, U.S.A. A series of drift deposits comprising the larger contourite depositional system were interpreted from a 2-D industry seismic data set. The now subsurface drift deposits are adjacent to the anomalous seabed feature, the DeSoto Canyon, and these data suggest contourite deposition and ocean currents are in integral part of the canyon’s depositional history. The contourite depositional system is underlain by an extensive, middle Miocene aged, erosional unconformity f

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19

Msiza, Sharon Phumzile. "The First Draft Merchant Shipping, Bill: Should South Africa implement the proposed amendments in section 271 of the Bill, in its current form?" Master's thesis, Faculty of Law, 2019. http://hdl.handle.net/11427/31101.

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For over a period of over sixty years, South Africa has applied the provisions of the MSA enacted in 1951 to matters relating to shipowner’s right to limit liability. Since then, Parliament has made several attempts at amending the MSA with no success. However, determining whether South Africa should implement the proposed amendments in terms of the MSA Draft Bill, is an inquiry that should not only include a comparison of the old order with the newly proposed order, but, it should also require reasons as to why the reform should be achieved in a particular manner. This is important because kn

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20

Paulat, Lars Marco [Verfasser], and Christian [Akademischer Betreuer] Betzler. "A seismic approach to classify carbonate contourite drifts aroundactive isolated carbonate platforms (Bahamas, Maldives) and its significance for the reconstruction of paleo-currents / Lars Marco Paulat ; Betreuer: Christian Betzler." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1192442792/34.

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21

Brushett, Ben Amon. "Assessment of Metocean Forecast Data and Consensus Forecasting for Maritime Search and Rescue and Pollutant Response Applications." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/367700.

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Effective prediction of objects drifting on the water surface is essential to successful maritime search and rescue (SAR) services, since a more accurate prediction of the object’s likely location results in a greater probability for the success of a SAR operation. SAR drift models, based on Lagrangian stochastic particle trajectory models, are frequently utilised for this task. More recently, metocean (meteorological and oceanographic) forecast data has been used as input to these models to provide the environmental forcing (due to winds and ocean currents) that the object may be subject to.

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22

Miramontes, García Elda. "Glissements sous-marins en mer Tyrrhénienne septentrionale et relations avec les dépôts contouritiques et turditiques : morphologie, stratigraphie, géotechnique et modélisation." Thesis, Brest, 2016. http://www.theses.fr/2016BRES0083/document.

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Le Canal de Corse est un bassin confiné asymétrique localisé entre l’Île de Corse et l’Archipel de la Toscane, dont le flanc ouest est dominé par des processus turbiditiques et hémipélagiques et le flanc est par des mouvements en masse et des processus contouritiques. Le présent projet de doctorat a pour objectif de comprendre plus précisément les mécanismes contrôlant la formation des glissements sous-marins dans les contourites vaseuses (dépôts sédimentaires formés par les courants) pendant la période Plio-Quaternaire. Le vaste jeu de données disponible pour ce projet de doctorat inclut : la

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23

Strauss, Roelf du Toit. "Modelling of cosmic ray modulation in the heliosphere by stochastic processes / Roelf du Toit Strauss." Thesis, North-West University, 2013. http://hdl.handle.net/10394/10217.

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The transport of cosmic rays in the heliosphere is studied by making use of a newly developed modulation model. This model employes stochastic differential equations to numerically solve the relevant transport equation, making use of this approach’s numerical advantages as well as the opportunity to extract additional information regarding cosmic ray transport and the processes responsible for it. The propagation times and energy losses of galactic electrons and protons are calculated for different drift cycles. It is confirmed that protons and electrons lose the same amount of rigidity when t

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24

Widmer, Johannes. "Charge transport and energy levels in organic semiconductors." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-154918.

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Organic semiconductors are a new key technology for large-area and flexible thin-film electronics. They are deposited as thin films (sub-nanometer to micrometer) on large-area substrates. The technologically most advanced applications are organic light emitting diodes (OLEDs) and organic photovoltaics (OPV). For the improvement of performance and efficiency, correct modeling of the electronic processes in the devices is essential. Reliable characterization and validation of the electronic properties of the materials is simultaneously required for the successful optimization of devices. Further

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25

Wang, Jhong-Sheng, and 王仲盛. "Drift-Current Threshold Voltage Models of MOSFETs." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/74494561749171279789.

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26

Lu, Ming-Chien, and 呂明杰. "Relative Discussion on Nearshore Current Field Survey by the Free Drift Float." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/97056952574146599806.

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碩士<br>國立成功大學<br>水利及海洋工程學系碩博士班<br>94<br>With the increasing of population and the improvement of industrial and/or commercial activities, coastal zone’s usage has been put on more emphasis in Taiwan. Due to the limit territory and ocean surrounding environment, it is necessary to ensure the efficient usage of space and avoid the negative affections caused by human over-developed in coastal zone. So, nearshore current survey and marine data collections such as wind, wave, and depth were indispensable on the characters studing of coastal zone. The relative low price free drift float which is ba

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27

Lebovitz, Aaron Joshua. "Bounded beliefs, disagreement, and under-reaction to news : explaining post earnings announcement drift /." 2003. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3088760.

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28

"Drift-Diffusion Simulation of the Ephaptic Effect in the Triad Synapse of the Retina." Doctoral diss., 2013. http://hdl.handle.net/2286/R.I.17750.

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abstract: A general continuum model for simulating the flow of ions in the salt baths that surround and fill excitable neurons is developed and presented. The ion densities and electric potential are computed using the drift-diffusion equations. In addition, a detailed model is given for handling the electrical dynamics on interior membrane boundaries, including a model for ion channels in the membranes that facilitate the transfer of ions in and out of cells. The model is applied to the triad synapse found in the outer plexiform layer of the retina in most species. Experimental evidence sugge

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29

Müller, Valter Rodrigues Luís Bastos. "Dinâmica de processos oceânicos costeiros – Comparação e análise dos dados de radar HF." Master's thesis, 2017. http://hdl.handle.net/10400.26/21040.

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A medição de correntes em tempo quasi-real pelos sistemas de deteção remota assume grande relevo para as atividades desenvolvidas no mar, tanto militares como civis. Os dados obtidos através dos radares de alta frequência (HF), no caso específico de Portugal os CODAR SeaSonde, são também fundamentais nas operações de busca e salvamento e de recolha de objetos à deriva, visto que permite um cálculo da deriva mais próximo da realidade. O presente trabalho focou-se na análise da deriva estimada através dos dados obtidos pelo sistema de radares HF de Lisboa, e na sua comparação com a deriva real

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30

Raath, Jan Louis. "A comparative study of cosmic ray modulation models / Jan Louis Raath." Thesis, 2015. http://hdl.handle.net/10394/15516.

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Until recently, numerical modulation models for the solar modulation of cosmic rays have been based primarily on finite difference approaches; however, models based on the solution of an appropriate set of stochastic differential equations have become increasingly popular. This study utilises such a spatially three-dimensional and time-stationary model, based on that of Strauss et al. (2011b). The remarkable numerical stability and powerful illustrative capabilities of this model are utilised extensively and in a distinctly comparative fashion to enable new insights into the processes of modul

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31

Widmer, Johannes. "Charge transport and energy levels in organic semiconductors." Doctoral thesis, 2013. https://tud.qucosa.de/id/qucosa%3A28350.

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Organic semiconductors are a new key technology for large-area and flexible thin-film electronics. They are deposited as thin films (sub-nanometer to micrometer) on large-area substrates. The technologically most advanced applications are organic light emitting diodes (OLEDs) and organic photovoltaics (OPV). For the improvement of performance and efficiency, correct modeling of the electronic processes in the devices is essential. Reliable characterization and validation of the electronic properties of the materials is simultaneously required for the successful optimization of devices. Further

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