Dissertationen zum Thema „Density Evolution (DE)“
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit Top-50 Dissertationen für die Forschung zum Thema "Density Evolution (DE)" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Sehen Sie die Dissertationen für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.
Jain, Bhuvnesh. „The evolution of cosmological density fluctuations“. Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/28060.
Der volle Inhalt der QuelleLumsden, Stuart Leonard. „The statistics and evolution of cosmological density fluctuations“. Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/28460.
Der volle Inhalt der QuelleDurham, Laura M. (Laura Marie) 1977. „A density evolution analysis of turbo product codes“. Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/87208.
Der volle Inhalt der QuelleIncludes bibliographical references (leaves 112-113).
by Laura M. Durham.
S.M.
Arsenlis, Athanasios 1975. „Modeling dislocation density evolution in continuum crystal plasticity“. Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/36679.
Der volle Inhalt der QuelleIncludes bibliographical references (p. 221-229).
Dislocations are the singly most important material defects in crystal plasticity, and although dislocation mechanics has long been understood as the underlying physical basis for continuum crystal plasticity formulations, explicit consideration of crystallo- graphic dislocation mechanics has been largely absent in working constitutive models. In light of recent theoretical developments in dislocation dynamics, and the introduc- tion of geometrically necessary dislocation (GND) density in continuum formulations through plastic strain gradients, a single crystal plasticity model based on dislocation density state variables is developed. The density state variables evolve from initial conditions according to equations based on fundamental concepts in dislocation me- chanics such as the conservation of Burgers vector in multiplication and annihilation processes. Along with those processes that account for bulk statistical dislocation evolution, the evolving polarity due to dislocation species flux divergences may be in- cluded to detail the length-scale dependence of mechanical properties on the micron level. The full dislocation density description of plasticity allows a simple evaluation of the role of GND density in non-homogeneously deforming bodies. A local version of the constitutive model, which captures the bulk processes of dislocation multiplication and annihilation during plastic deformation, is implemented within a finite element framework to investigate the poly-slip behavior of aluminum single crystals under tension.
(cont.) A non-local version of the constitutive model using an idealized planar double slip system geometry is implemented within a finite element framework to investigate the length-scale dependence observed in the bending of thin single crystal beams. The results not only capture the mechanical stress/strain response of the material, but also detail the development of underlying dislocation structure responsible_ fr: the plistic behavior of the crystal.
by Athanasios Arsenlis.
Ph.D.
Cross, Nicholas James Geraint. „The bivariate space density of galaxies“. Thesis, University of St Andrews, 2002. http://hdl.handle.net/10023/12935.
Der volle Inhalt der QuellePercival, Will. „Cosmological structure formation and its link to quasar evolution“. Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325786.
Der volle Inhalt der QuelleBorch, Andrea. „Evolution of the stellar mass density of galaxies since redshift 1.0“. [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972022481.
Der volle Inhalt der QuelleLane, Jennifer M. (Jennifer Marie) 1977. „A fundamental study of feature evolution during high density plasma etching“. Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80245.
Der volle Inhalt der QuelleIncludes bibliographical references (leaves 91-94).
by Jennifer M. Lane.
M.Eng.and S.B.
Benage, Mary Catherine. „The thermal evolution and dynamics of pyroclasts and pyroclastic density currents“. Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53962.
Der volle Inhalt der QuelleMahorowala, Arpan P. (Arpan Pravin) 1970. „Feature profile evolution during the high density plasma etching of polysilicon“. Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50514.
Der volle Inhalt der QuelleIncludes bibliographical references (p. 185-191).
This thesis work deals with one of the critical steps in the manufacturing of modem integrated circuits - the plasma etching of thin polysilicon films used to form the metaloxide- semiconductor transistor gate. The etching of very small features (-0.25 jim) in the -2500 A thick films, performed at low operating pressures (-10 mTorr), must be accompanied with minimal etching artifacts that can degrade device performance. This thesis aims to understand the causes for the etching artifacts observed during the etching of polysilicon line-and-space features in C12 and HBr plasmas so that better etching recipes can be developed. The second goal of this work was to develop a generalized simulator capable of predicting the feature profile evolution for the above plasma etching system as well as systems involving other materials and chemistries. The 2V2-dimensional simulator developed used Monte Carlo techniques to compute the transport and surface kinetics combined with a cellular representation of the feature. Using the Monte Carlo algorithm permitted the incorporation of all dominant physical and chemical mechanisms of the etching process such as angle-dependent ionenhanced etching, physical sputtering, ion scattering, surface recombination, plasma deposition, and line-of-sight re-deposition without encountering numerical difficulties. The technique allowed the calculation of surface kinetics rates based on the surface composition; simultaneous composition-dependent etching and deposition could be handled easily. A modification of the cellular representation of the feature was developed to determine neutral species interactions with the surface correctly. A surface normal calculation algorithm involving least-squares fitting of the surface was developed to handle specular ion scattering. Designed sets of plasma etching experiments were performed on photoresist masked and silicon oxide-masked polysilicon samples using C12 and HBr chemistries varying the inductive power (controls the ion density, radical concentrations), the rf biasing power (controls the ion energy) and the gas flowrate (controls the reactant and product concentrations). The interesting features exhibited in the experimental profiles included: 1) the increased sidewall deposition associated with photoresist-masking and isolated features, 2) the greater curvature of the sidewalls associated with the combination of photoresist and Cl2 plasmas, 3) the more vertical sidewalls achieved with HBr, 4) the double faceting of the feature sidewalls under etching conditions accompanied by significant deposition, 5) the delay in the onset of microtrenching at the feature bottom while etching photoresist-masked samples with C12, 6) the greater microtrenching exhibited with silicon oxide-masking and C12 plasmas, and 7) the lack of microtrenching for the HBr etching. The experimental results suggested strong dependencies of microtrenching, tapered sidewall profiles and photoresist-mask faceting on the feature aspect ratio, product formation rate and product residence time in the etching chamber. The etching artifacts were explained using the profile evolution simulator. The microtrenching was associated with two mechanisms - ion scattering from tapered sidewalls and the focussing of directional ions by bowed sidewalls onto the feature bottom. The former mechanism led to trenching initially while the latter mechanism gained importance midway during the etching. The absence of tapered sidewalls initially and the relatively straight sidewall profiles developed during the etching explained the non-occurrence of microtrenches when using HBr. Under processing conditions accompanied by significant deposition, facets at two distinct angles were predicted. The top facet depended on the composition of the material on the photoresist-mask line and its etching angular dependence. The lower facet angle and the polysilicon sidewall profile were governed by the feature aspect ratio, the sticking probabilities and fluxes of the depositing material, and the depositing material etching angular dependence. The phenomenon of feature charging was incorporated in the Monte Carlo simulator to understand its role in the profile evolution. Two electrical approximations were made for the feature - the perfectly insulating and a novel resistive approximation. With an insulating feature, the potential profiles were obtained by determining the space charge on the feature surface and solving Poisson's equation over the entire simulation domain. Calculation of the potential profiles with the resistive feature representation involved treating the feature as a large resistive network, determining the steady-state currents to the feature surface and solving the conductivity equation and Laplace's equation in the solid and gas, respectively. The role surface and bulk conductivities played on the potential profiles were studied. The potential profile in a completely etched polysilicon (conducting) feature with a silicon oxide (insulating) feature bottom was generated. Higher ion currents were calculated at the lower part of the polysilicon sidewall. These currents can etch the passivating material deposited at lower portion of the sidewall enabling spontaneous etching of the sidewall, and cause notching of the sidewall.
by Arpan P. Mahorowala.
Ph.D.
Smith, Alyson Rae. „Designing density“. Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28147.
Der volle Inhalt der QuelleMalgesini, Giusseppe. „Evolution of submarine sediment density flows deduced from long distance bed correlations“. Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/351356/.
Der volle Inhalt der QuelleDlamini, Simthembile. „Evolution of matter density perturbations in viable f (R) theories of gravity“. Master's thesis, Faculty of Science, 2019. http://hdl.handle.net/11427/31500.
Der volle Inhalt der QuelleTejeda, Abiezer. „Correcting Errors Due to Species Correlations in the Marginal Probability Density Evolution“. DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/1472.
Der volle Inhalt der QuelleOda, Takeshi. „The cosmic evolution of supernova rate density : implications for the galaxy evolution and the origin of type 1a supernova“. 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136885.
Der volle Inhalt der QuelleFerguson, Jane A. „Fiber optic chemical sensors : the evolution of high-density fiber-optic DNA microarrays /“. Thesis, Connect to Dissertations & Theses @ Tufts University, 2001.
Den vollen Inhalt der Quelle findenAdviser: David R. Walt. Submitted to the Dept. of Chemistry, Includes bibliographical references (leaves 197-208). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
Sandfeld, Stefan. „Evolution of dislocation density in a higher-order continuum theory of dislocation plasticity“. Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/11367.
Der volle Inhalt der QuelleLu, Peizhen. „Microstructural evolution and macroscopic shrinkage in the presence of density gradients and agglomeration /“. The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488194825665703.
Der volle Inhalt der QuelleWatkins, Aaron Emery. „A New Perspective on Galaxy Evolution From the Low Density Outskirts of Galaxies“. Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1499354382030385.
Der volle Inhalt der QuelleLarsdotter, Mellström Helena. „Life history evolution in a bivoltine butterfly“. Doctoral thesis, Stockholms universitet, Zoologiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-81399.
Der volle Inhalt der QuelleAt the time of the doctoral defence the following paper was unpublished and had a status as follows: Paper 5: Submitted manuscript.
Casavecchia, Benedetta. „Studying synthetic column density maps and absorption spectra from galactic wind models“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25361/.
Der volle Inhalt der QuelleGraur, Or, K. Decker French, H. Jabran Zahid, James Guillochon, Kaisey S. Mandel, Katie Auchettl und Ann I. Zabludoff. „A Dependence of the Tidal Disruption Event Rate on Global Stellar Surface Mass Density and Stellar Velocity Dispersion“. IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/626532.
Der volle Inhalt der QuelleSandfeld, Stefan [Verfasser]. „The Evolution of Dislocation Density in a Higher-order Continuum Theory of Dislocation Plasticity / Stefan Sandfeld“. Aachen : Shaker, 2011. http://d-nb.info/1084535742/34.
Der volle Inhalt der QuelleLim, Wen Jun. „Analysis and design of analog fountain codes for short packet communications“. Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29277.
Der volle Inhalt der QuelleBjartnes, Erik. „Oxygen evolution on La1-xSrxCoO3 Pellet-Electrodes in alkaline Solution : Charge Carrier density dependence of electrocatalytic activity“. Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18901.
Der volle Inhalt der QuelleWilkins, Stephen Matthew. „Comparing the evolution of the stellar mass density with that predicted from the cosmic star formation history“. Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608736.
Der volle Inhalt der QuelleGómez, Jenny Marcela Rodríguez. „Evolution of the electron density, temperature distribution in the solar corona during solar cycles 23 and 24“. Instituto Nacional de Pesquisas Espaciais (INPE), 2017. http://urlib.net/sid.inpe.br/mtc-m21b/2017/02.16.21.15.
Der volle Inhalt der QuelleEsta tese tem como objetivo principal o estudo dos parâmetros de plasma na coroa solar, usando um modelo de transporte de fluxo, extrapolações de campo livre de forças, um modelo de emissão e um algoritmo de optimização. O modelo esta baseado na ideia que as variações da irradiância e os parâmetros de plasma estão relacionados com a evolução do campo magnético solar. O objetivo é reconstruir as distribuições de densidade e temperatura na coroa solar e a emissão em quatro comprimentos de onda diferentes durante os dois últimos ciclos solares e também a emissão, perfis densidade eletrônica e temperatura usando a região ativa NOAA 11855. A relação entre a dinâmica, emissão e parâmetros de plasma em diferentes escalas de tempo são revisadas. Estas características são importantes em astrofísica e geofísica, porque podem ajudar a entender fenômenos físicos como o aquecimento coronal e eventos eruptivos.
Munger, Emily LaRee. „Alteration to Astrocyte Density and Morphology across Mammalia with Specific Attention to Primate Brain Evolution and Aging“. Kent State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=kent1594638449298271.
Der volle Inhalt der QuelleReynolds, Eric W. „Laboratory observation of evolution of IEDD-wave-modified equilibrium and density-gradient effects on SMIA wave propagation“. Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10471.
Der volle Inhalt der QuelleTitle from document title page. Document formatted into pages; contains xxviii, 307 p. : ill. Includes abstract. Includes bibliographical references (p. 118-131).
Knoche, Krysti Lynn. „Density gradient films, lanthanide electrochemistry, and magnetic field effects on hydrogen evolution, oxygen reduction, and lanthanide electrochemistry“. Diss., University of Iowa, 2015. https://ir.uiowa.edu/etd/3124.
Der volle Inhalt der QuelleLibois, Quentin. „Evolution des propriétés physiques de neige de surface sur le plateau Antarctique. Observations et modélisation du transfert radiatif et du métamorphisme“. Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENU026/document.
Der volle Inhalt der QuelleThe surface energy balance of the Antarctic Plateau is mainly governed by the physical properties of the snowpack in the topmost centimeters, whose evolution is driven by intricated processes such as: snow metamorphism, temperature profiles variations, solar radiation penetration, precipitation, snow drift, etc. This thesis focuses on the interactions between all these components and aims at simulating the evolution of snow density and snow grain size (specific surface area) on the Antarctic Plateau. To physically model the absorption of solar radiation within the snowpack, a radiative transfer model with high spectral resolution (TARTES) is implemented in the detailed snowpack model Crocus. TARTES calculates the vertical profile of absorbed radiation in a layered snowpack whose characteristics are given. These characteristics include snow grain shape, a parameter that has been seldom studied. For this reason, an experimental method to estimate the optical grain shape is proposed and applied to a large number of snow samples. This method, which combines optical measurements, TARTES simulations and Bayesian inference, is used to estimate the optimal shape to be used in snow optical models. In addition, it highlights that representing snow as a collection of spherical particles results in overestimation of the penetration depth of solar radiation. The influence of the penetration of solar radiation on the snow temperature profiles is then investigated with analytical and numerical tools. The results point out the high sensitivity of the temperature profiles to surface snow physical properties. In particular, the density of the topmost centimeters of the snowpack is critical for the energy budget of the snowpack because it impacts both the effective thermal conductivity and the penetration depth of light. To simulate the evolution of snow physical properties at Dome C by taking into account their interdependence with snow optical properties, the model Crocus is used, driven by meteorological data. These simulations are evaluated against a set of data collected during field missions as well as automatic measurements of snow spectral albedo and penetration depth. These observations highlight the influence of weather conditions on the temporal variability of surface snow properties. They show the existence of a slow decrease of snow grain size at the surface during summer. Rapid changes are also observed, essentially due to precipitation. These variations are well simulated by Crocus when forced by an appropriate atmospheric forcing. In particular, the impact of wind on the evolution of the snowpack is crucial because it controls the surface density through snow transport. This transport is also responsible for the spatial variability of snow properties observed at Dome C. That is why a stochastic representation of snow erosion and transport in Crocus is proposed. It explains well the observations of the spatial variability of density and grain size, and reproduces the variability of the annual accumulation as well as rapid changes in snow height resulting from drift events. This study improves our understanding of the physical processes which drive the properties of snow close to the surface on the Antarctic Plateau, and also points out the critical role of wind, the impact of which is very difficult to account for in models yet
Zhang, Tianyu. „DENSITY FUNCTIONAL THEORY STUDIES ON THE STRUCTURAL EVOLUTION AND CATALYTIC REACTIVITY OF MOLYBDENUM-BASED CATALYSTS FOR METHANE CONVERSION“. OpenSIUC, 2019. https://opensiuc.lib.siu.edu/dissertations/1768.
Der volle Inhalt der QuelleLuna, Ricardo, und Hrishikesh Tapse. „An Analysis on the Coverage Distance of LDPC-Coded Free-Space Optical Links“. International Foundation for Telemetering, 2008. http://hdl.handle.net/10150/606240.
Der volle Inhalt der QuelleWe design irregular Low-Density Parity-Check (LDPC) codes for free-space optical (FSO) channels for different transmitter-receiver link distances and analyze the error performance for different atmospheric conditions. The design considers atmospheric absorption, laser beam divergence, and random intensity fluctuations due to atmospheric turbulence. It is found that, for the same transmit power, a system using the designed codes works over much longer link distances than a system that employs regular LDPC codes. Our analysis is particularly useful for portable optical transceivers and mobile links.
Whitaker, Katherine E., Rachel Bezanson, Dokkum Pieter G. van, Marijn Franx, der Wel Arjen van, Gabriel Brammer, Natascha M. Förster-Schreiber et al. „Predicting Quiescence: The Dependence of Specific Star Formation Rate on Galaxy Size and Central Density at 0.5 < z < 2.5“. IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623862.
Der volle Inhalt der QuelleWhitaker, Katherine E., Rachel Bezanson, Dokkum Pieter G. van, Marijn Franx, der Wel Arjen van, Gabriel Brammer, Natascha M. Foerster-Schreiber et al. „Predicting Quiescence: The Dependence of Specific Star Formation Rate on Galaxy Size and Central Density at 0.5 < z < 2.5“. IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623944.
Der volle Inhalt der QuelleHjelm, Vivien. „Optimizing a Single Atom Catalyst for theOxygen Evolution Reaction using DensityFunctional Theory“. Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259703.
Der volle Inhalt der QuelleRunt om i världen finns ett ökat intresse för förnyelsebara energi och bränslekällor för att tackla klimat förändringarna. Stor del av forskningen som görs idag har i syfte att hitta nya lösningar för att minska klimatpåverkan i olika områden. Ett av forskningsområderna är hitta vägar till en miljövänligare vätgasproduktion där vätgasen skulle kunna användas i bränsleceller. Dessa celler kan sättas i elbilar och på så sätt fasa ut användingen av fossila bränslen. En av utmaningarna för vätgasproduktionen är att den idag är kostsam och kräver mycket energi. Forskare försöker hitta olika katalysatorer som kan minska energiåtgången som krävs vid elektrolys av vatten där syrgas och vätgas produceras. Målet med det här examensarbetet är att se hur en single atom catalyst kan påverka reaktionskinitiken för den syrgasbildande reaktionen vid elektrolys av vatten. Huvudstrukturen för katalysatorn som beräkningarna är gjorda på är en porphyrinmolekyl där olika övergångsmetaller kommer testas som det aktiva sätet i katalysatorn. Olika ligander kommer även tillsättas systemet samt utbyte av några väteatomer till olika substituenter i porfyrinstrukturen. Katalysatorn optimerades i det kvantkemiska beräkningsprogrammet Gaussian 16 med funktionalen PBE0 med basset Def2svp och Def2tzvpp. Resultaten visade att olika modifikationer på systemet hade en påverkan på katalysatorns aktivitet. Den största påverkan hade de olika liganderna som placerades under det aktiva sätet jämfört med de olika substituenterna. De bästa metallerna för katalysatorn var iridium, rhodium och kobolt vilket alla ligger i grupp nio i det periodiska systemet. Den lägsta överpotentialen på 0.513 V gavs av iridium systemet med fyra utbyta väten till fluor.
Hui, Lam. „The evolution of density fluctuations through reheating in the inflationary universe and gravitational instability in the non-linear regime“. Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38413.
Der volle Inhalt der QuelleMiao, Sha Ph D. Massachusetts Institute of Technology. „Mechanistic study of slug formation and evolution in high-viscosity-liquid/High-density-gas multiphase flows in channels/pipes“. Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118725.
Der volle Inhalt der QuelleCataloged from PDF version of thesis.
Includes bibliographical references (pages 165-176).
Rapidly rising global energy demand coupled with dwindling conventional oil resources has pushed unconventional oil, such as heavy oil, to become one of the most important future energy resources. However, design and operation of pipelines to transport heavy-oil/gas flows have raised new challenges associated with remarkably different flow regime transitions compared to conventional low-viscosity-oil/low-density-gas flows. Many traditional flow regime models for these oil/gas flows result in O(1) prediction errors when applied to high-viscosity-oil/high-density-gas flows because they fail to account for the complex change in physics and scales that occur as the fluid properties substantially change. Therefore, understanding the mechanisms that cause flow-regime transition for these types of flows is of critical importance to the development of physics-based models allowing for the creation of more robust and cost effective designs. The work described in this thesis focuses on investigating the fundamental mechanisms governing the initial growth and nonlinear evolution of interfacial waves leading to slugging in concurrent high-viscosity (laminar) liquid/high-density(turbulent) gas two-phase flows in horizontal channels/pipes. We first develop a Fully-Coupled Immersed Flow (FCIF) solver for the three-dimensional simulation of fluid-fluid interaction by coupling two distinct flow solvers using an Immersed Boundary (IB) method. The FCIF solver captures dynamic interactions between two fluids with disparate flow properties, while retaining the desirable simplicity of non-boundary-conforming grids. For the application of slug development with turbulent gas and laminar liquid, we couple an IB-based unsteady Reynolds Averaged Navier Stokes (uRANS) simulator with a depth-integrated (long-wave) solver in FCIF. We perform a series of validations on this method. The results demonstrate that the FCIF solver effectively captures the essential physics of gas-liquid interaction and can serve as a useful tool for the mechanistic study of slug generation in two-phase gas/liquid flows in channels and pipes.
by Sha Miao.
Ph. D.
Hodgkinson, Jonathan. „Sedimentary evolution, hydrogeology and geochemistry of a back-barrier sand island : Toorbul, Southeast Queensland“. Thesis, Queensland University of Technology, 2008. https://eprints.qut.edu.au/16686/1/Jonathan_Hodgkinson_Thesis.pdf.
Der volle Inhalt der QuelleHodgkinson, Jonathan. „Sedimentary evolution, hydrogeology and geochemistry of a back-barrier sand island : Toorbul, Southeast Queensland“. Queensland University of Technology, 2008. http://eprints.qut.edu.au/16686/.
Der volle Inhalt der QuelleRoucher, Clémentine. „Evolution de l'épidémiologie et des critères diagnostiques du paludisme clinique à Dielmo de 1990 à 2010“. Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM5062.
Der volle Inhalt der QuelleIn tropical Africa, where malaria is highly endemic, most people are semi-immune and asymptomatic infections are widespread. Thus, the detection of malaria parasites in the blood of febrile patients is not a sufficient criterion for distinguishing malaria from other causes of fever. In Dielmo, a Senegalese village of about 500 inhabitants in 2010, a very closely continuous epidemiological monitoring of malaria began in 1990. In this village where the transmission is perennial, the establishment of more effective means of control and prevention against malaria have profoundly changed the epidemiology of malaria. In this work, we analyze the impact of these interventions on the parasite prevalences, the parasite densities and the malaria diagnostic criteria and we measure the evolution of Plasmodium falciparum, P. malariae and P. ovale clinical malaria from June 1990 to December 2010 in Dielmo. Parasitological and clinical data are analyzed in a random effect logistic regression to investigate the relationship between parasite density and fever risk. The prevalence of the three Plasmodium species decreased dramatically with the abandonment of chloroquine as first line treatment and his replacing with the combination therapies and became almost zero after the introduction of long lasting insecticidal nets. Pyrogenic thresholds calculated enabled us to measure the incidence density of malaria and to study the impact of intervention methods on malaria morbidity in the population
Decarli, Roberto, Fabian Walter, Manuel Aravena, Chris Carilli, Rychard Bouwens, Cunha Elisabete da, Emanuele Daddi et al. „ALMA SPECTROSCOPIC SURVEY IN THE HUBBLE ULTRA DEEP FIELD: CO LUMINOSITY FUNCTIONS AND THE EVOLUTION OF THE COSMIC DENSITY OF MOLECULAR GAS“. IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/623950.
Der volle Inhalt der QuelleKameni, Ngassa Christiane. „Décodeurs LDPC opérant sur des circuits à comportement probabiliste : limites théoriques et évaluation pratique de la capacité de correction“. Thesis, Cergy-Pontoise, 2014. http://www.theses.fr/2014CERG0735/document.
Der volle Inhalt der QuelleOver the past few years, there has been an increasing interest in error correction decoders built out of unreliable components. Indeed, it is widely accepted that future generation of electronic circuit will be inherently unreliable, due to the increase in density integration and aggressive voltage scaling. Furthermore, error correction decoders play a crucial role both in reliable transmission of information and in the design of reliable storage systems. It is then important to investigate the robustness of error correction decoders in presence of hardware noise.In this thesis we focus on LDPC decoders built out of unreliable computing units. We consider three types of LDPC decoders: the finite-precision Min-Sum (MS) decoder, the Self-Corrected Min-Sum (SCMS) decoder and the Stochastic decoder.We begin our study by the statistical analysis of the finite-precision Min-Sum decoder with probabilistic components. To this end, we first introduce probabilistic models for the arithmetic and logic units of the decoder and discuss their symmetry properties. We conduct a thorough asymptotic analysis and derive density evolution equations for the noisy Min-Sum decoder. We highlight that in some particular cases, the noise introduced by the device can increase the correction capacity of the noisy Min-Sum with respect to the noiseless decoder. We also reveal the existence of a specific threshold phenomenon, referred to as functional threshold, which can be viewed as the generalization of the threshold definition for noisy decoders. We then corroborate the asymptotic results through Monte-Carlo simulations.Since density evolution cannot be defined for decoders with memory, the analysis of noisy Self-corrected Min-Sum decoders and noisy Stochastic decoders was restricted to Monte-Carlo simulations.We emulate the noisy SCMS decoders with various noise parameters and show that noisy SCMS decoders perform close to the noiseless SCMS decoder for a wide range of noise parameters. Therefore, one can think of the self-correction circuit as a noisy patch applied to the noisy MS decoder, in order to improve its robustness to hardware defect. We also evaluate the impact of the decoder scheduling on the robustness of the noisy MS and SCMS decoders and show that when the serial scheduling is used neither the noisy MS decoder nor the noisy SCMS decoder can provide acceptable error correction.Finally, we investigate the performance of stochastic decoders with edge-memories in presence of hardware noise. We propose two error models for the noisy components. We show that in some cases, the hardware noise can be used to lower the error floor of the decoder meaning that stochastic decoders have an inherent fault tolerant capability
WANG, YANXIA. „HIGH SPEED TURBO TCM OFDM FOR UWB AND POWERLINE SYSTEM“. Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3198.
Der volle Inhalt der QuellePh.D.
Department of Electrical and Computer Engineering
Engineering and Computer Science
Electrical Engineering
Tripsanas, Efthymios. „Evolution of depositional and slope instability processes on Bryant Canyon area, Northwest Gulf of Mexico“. Texas A&M University, 2003. http://hdl.handle.net/1969.1/1627.
Der volle Inhalt der QuelleLee, Bomee, Mauro Giavalisco, Katherine Whitaker, Christina C. Williams, Henry C. Ferguson, Viviana Acquaviva, Anton M. Koekemoer et al. „The Intrinsic Characteristics of Galaxies on the SFR–M ∗ Plane at 1.2 < z < 4: I. The Correlation between Stellar Age, Central Density, and Position Relative to the Main Sequence“. IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627039.
Der volle Inhalt der QuelleVermeulen, Stephanie. „an architecture of daily life: the continuing evolution of Toronto's residential fabric“. Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2889.
Der volle Inhalt der QuelleChampollion, Nicolas. „Evolution de la surface de neige sur le plateau Antarctique : observation in situ et satellite“. Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00934480.
Der volle Inhalt der QuelleAlmutairi, Alanoud. „Electronic band structure equations and Fermi surface evolution from 2D materials to 3D layered superconducting compounds“. Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/134414/1/Alanoud%20Mulfi%20Z_Almutairi_Thesis.pdf.
Der volle Inhalt der QuelleGonzalez-Pena, Omar Israel. „Mass Transport Enhancement in Copper Electrodeposition due to Gas Co-Evolution“. Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1439826379.
Der volle Inhalt der Quelle