Thesis (Ph. D.)--Oregon Graduate Institute of Science and Technology, 1997.

Thesis (Ph. D.)--Princeton University, 1933. / "Reprinted from Shore and beach, journal of the American shore and beach preservation association, vol. II, no. 2., April, 1934." Bibliography: p. 54.

Thesis (Ph. D.)--University of California, Los Angeles, 2002. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1968. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

No description available.

Edited by Bostwick H. Ketchum. / The workshop was held 22 May - 3 June 1972 and was cosponsored by the Institute of Ecology and Woods Hole Oceanographic Institution. / Includes bibliographies.

Thesis: Sc. D., Massachusetts Institute of Technology, Department of Civil Engineering, 1980 / Bibliography: leaves 173-175. / by David William Ostendorf. / Sc. D. / Sc. D. Massachusetts Institute of Technology, Department of Civil Engineering

Orientador: Luci Hidalgo Nunes / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias / Made available in DSpace on 2018-08-12T03:18:05Z (GMT). No. of bitstreams: 1 Barbosa_JoaoPauloMacieira_M.pdf: 12381709 bytes, checksum: 9c7fe94773610efd6ec92aab3d1f49d8 (MD5) Previous issue date: 2008 / Resumo: Este estudo avaliou precipitações extremas no litoral do estado de São Paulo e entorno nas décadas de 1970 a 1990 nas escalas decadal, anual, sazonal e mensal. A área é caracterizada por chuvas constantes e copiosas devido a fatores geográficos e atmosféricos. O setor foi dividido em três repartições: norte, central e sul, e a partir de técnicas estatísticas, foram avaliadas as variabilidades espácio-temporais da precipitação. As técnicas empregadas para identificar extremos (distribuição normal padrão, quantis e tempo de retorno) apontaram tendências semelhantes, porém alguns aspectos foram destacados: no nível anual os quantis se mostraram mais apropriados para apontar ocorrências extremas: no nível mensal, a padronização levantou mais eventos extremos e mostrou maior similaridade com o período de retorno. Sugere-se que no estudo de eventos extremos mais de uma técnica deveria ser empregada, tendo em vista que cada uma apresentou vantagens e desvantagens. Não houve nenhum padrão espacial que apontasse alteração significativa de tendência entre as décadas, mas destaca-se que a repartição central e Ubatuba apresentaram, no geral, os totais mais expressivos de chuvas. As estações e meses mais chuvosos são mais homogêneos quanto à distribuição ano a ano das precipitações. / Abstract: The study evaluated extreme precipitation events in the coast and surrounded areas of the state of São Paulo within the decades of 1970 to 1990 at decadal, annual, seasonal and monthly scales. The area is characterized by constant and heavy rainfall due to both geographical and atmospheric factors. The sector was divided into three compartments: north, central and south, and by means of statistical techniques the rainfall spatio-temporal variability was evaluated. The techniques chosen to identify extremes (normal distribution, quantiles and return period) showed similar trends, but some aspects were enhanced: at annual basis, quantiles proved more appropriate to point out extreme occurrences; for monthly data, standardized technique rise more events as extreme ones and showed more similarities to return period. One suggests that more than one statistical technique might be used for the evaluation of extreme events, since each one presents advantages and disadvantages. No spatial pattern consistent to significant alteration among the decades was found, but one enhances that the central compartment and Ubatuba presented in general the highest amounts of rainfall. The seasons and months that registered higher totals are more homogeneous concerning the year to year precipitation distribution. / Mestrado / Análise Ambiental e Dinâmica Territorial / Mestre em Geografia

L’objet de cette thèse est de considérer les coûts et la qualité comme les doubles produits de l’organisation mise en œuvre dans la production de soins. Les soins dispensés que l’on peut mesurer par leur qualité et leurs coûts dépendent directement de cette combinatoire. De ce considérant découle la question de recherche que l’on peut formuler de la façon suivante: « les coûts ne peuvent-ils être dans certaines conditions les sentinelles de la qualité ? ».Le mot « sentinelle » a une double référence, celle donnée par le dictionnaire au sens de personne qui a la charge de faire le guet et de prévenir en cas de risque d’intrusion mais aussi celle de l’image du ganglion sentinelle, premier ganglion pouvant être touché par le cancer qu'il est donc important d'analyser pour évaluer l'extension du cancer.Par un parallélisme des formes, c’est cette image qui dit le mieux notre hypothèse. Les coûts sont la face visible de la qualité. La recherche bibliographique sur le sujet montre l’émergence de cette question dans la littérature hospitalière. Le champ d’application de la thèse concerne l’hémodialyse. La vérification empirique a été réalisée auprès d’un échantillon multicentrique.La méthode de recherche a consisté à repérer à partir de l’analyse du méta processus de prise en charge d’un patient dialysé les processus majeurs représentant 80% des coûts et à décomposer chaque processus sous la forme d’un vecteur à trois dimensions exprimé par des indicateurs de coûts, des inducteurs de qualité et des indicateurs de qualité. Les mesures des indicateurs de qualité ont été confrontées aux données des bases nationales et aux référentiels formulés par les praticiens.Des mesures réalisées tout au long du processus de prise en charge évaluent la relation Coût/Qualité.Les résultats empiriques valident l’hypothèse dans certaines limites / The purpose of this PhD dissertation is to demonstrate that costs and quality stem from the organization of healthcare production. The measured quality and costs of medical care directly depend on this. From then on, under which conditions costs are to be considered as quality sentries? « Sentry » refers both to the dictionary definition (a sentry being in charge of keeping watch and of warning in case there is an intrusion) and to a « sentinel node », which is the first ganglion that is contaminated when getting a cancer. This last image particularly fits our thesis: costs are the visible face of quality. This Phd thesis deals with haemodialysis. Empirical verification was conducted with a polycentric sample. The research methodology consists in identifying the main processes dealing with the treatment of a dialysed patient. Those processes represent 80% of the overall costs; they are decomposed into a three dimensional vector (costs indicators, quality inductors and quality indicators). The measures associated with the quality indicators are confronted with national databases and with the reference documents, which are designed by the practitioners. Measures have been implemented during the whole caring process so as to evaluate the relation costs/quality. Empirical results confirm the generic hypothesis to a certain extent.

Details are given herein of the development, refinement and application of a higher-order accurate 3-D finite difference model for non-cohesive suspended sediment transport processes, in non-stratified estuarine and coastal waters. The velocity fields are computed using a 2-D horizontal depth-integrated model, in combination with either an assumed logarithmic velocity profile or a velocity profile obtained from field data. Also, for convenience in handling variable bed topographies and for better vertical resolution, a δ-stretching co-ordinate system has been used. In order to gain insight into the relative merits of various numerical schemes for modelling the convection of high concentration gradients, in terms of both accuracy and efficiency, thirty six existing finite difference schemes and two splitting techniques have been reviewed and compared by applying them to the following cases: i) 1-D and 2-D pure convection, ii) 1-D and 2-D convection and diffusion, and iii) 1-D non-linear Burger's equation. Modifications to some of the considered schemes have also been proposed, together with two new higher-order accurate finite difference schemes for modelling the convection of high concentration gradients. The schemes were derived using a piecewise cubic interpolation and an universal limiter (proposed scheme 1) or a modified form of the TVD filter (proposed scheme 2). The schemes have been tested for: i) 1-D and 2-D pure convection, and ii) 2-D convection and diffusion problems. The schemes have produced accurate, oscillation-free and non-clipped solutions, comparable with the ULTIMATE fifth- and sixth-order schemes. However, the proposed schemes need only three (proposed scheme 1) or five cell stencils. Hence, they are very attractive and can be easily implemented to solve convection dominated problems for complex bathymetries with flooding and drying. The 3-D sediment transport equation was solved using a splitting technique, with two different techniques being considered. With this technique the 3-D convective-diffusion equation for suspended sediment fluxes was split into consecutive 1-D convection, diffusion and convective-diffusion equations. The modified and proposed higher-order accurate finite difference schemes mentioned above were then used to solve the consecutive 1-D equations. The model has been calibrated and verified by applying it to predict the development of suspended sediment concentration profiles under non-equilibrium conditions in three test flumes. The results of numerical predictions were compared with existing analytical solutions and experimental data. The numerical results were in excellent agreement with the analytical solutions and were in reasonable agreement with the experimental data. Finally, the model has also been applied to predict sediment concentration and velocity profiles in the Humber Estuary, UK. Reasonable agreement was obtained between the model predictions and the corresponding field measurements, particularly when considered in the light of usual sediment transport predictions. The model is therefore thought to be a potentially useful tool for hydraulic engineers involved in practical case studies