957 resultados para Stokes, Peter


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This study explores the fascination which English culture represented in turn-of-the-century Vienna. The writers that are going to be discussed are the renowned Anglophile Hugo von Hofmannsthal, the more ambivalent Hermann Bahr and the idealizing, but Janus-faced Peter Altenberg. With the more widely known poet, prose writer and playwright, Hofmannsthal, individual aspects of his engagement with English culture have already been well researched; the same, however, cannot be said in the case of Hermann Bahr, whose extensive literary oeuvre has now largely been forgotten, and who has, instead, come to be valued as a prominent figure in the culture life of modernist Vienna, and Peter Altenberg, whose literary fame rests mainly on his prose poems and who, a legend in his life-time, has in recent years also increasingly attracted research interest as a phenomenon and ‘embodiment’ of the culture of his time: while their engagement with French literature, for example, has long received its due share of attention, their debt to English culture has, until now, been neglected. This thesis, therefore, sets out to explore Hofmannsthal’s, Bahr’s and Altenberg’s perception and portrayal of English civilization – ranging from English character and stereotypes, to what they saw as the principles of British society; it goes on to investigate the impulses they derive from Pre-Raphaelite art (Rossetti, Burne-Jones, Whistler) and the art and crafts-movement centred around William Morris, as well as their inspiration by the art criticism of John Ruskin and Walter Horatio Pater. In English literature one of the focal points will be their reading and evaluation of aestheticism as it was reflected in the life and writings of the Dubliner Oscar Wilde, who was perceived, by these Austrian authors, as a predominant figure of London’s cultural life. Similarly, they regarded his compatriot George Bernard Shaw as a key player in turn-of-the-century English (and European) culture. Hermann Bhar largely identified with him. Hofmannsthal, on the other hand, while having some reservations, acknowledged his importance and achievements, whereas Peter Altenberg saw in Shaw a model to reassure him, as his writings were becoming more openly didactic and even more miniaturistic than they had already been. He turned to Shaw, too, to explain and justify his new goal of making his texts more intelligent to a wider circle of readers.

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We present a novel numerical method for a mixed initial boundary value problem for the unsteady Stokes system in a planar doubly-connected domain. Using a Laguerre transformation the unsteady problem is reduced to a system of boundary value problems for the Stokes resolvent equations. Employing a modied potential approach we obtain a system of boundary integral equations with various singularities and we use a trigonometric quadrature method for their numerical solution. Numerical examples are presented showing that accurate approximations can be obtained with low computational cost.

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Review of 660 page study on WG Sebald

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An alternating procedure for solving a Cauchy problem for the stationary Stokes system is presented. A convergence proof of this procedure and numerical results are included.

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Петър Господинов, Добри Данков, Владимир Русинов, Стефан Стефанов - Изследвано е цилиндрично течение на Кует за разреден газ между два въртящи се цилиндъра. Получени са профилите на налягането, скоростта и температурата по метода на прякото статистическо моделиране (DSMC) и чрез числено решаване на уравненията на Навие-Стокс за свиваем флуид. Резултатите сочат много добро съвпадение за малки числа на Кнудсен Kn = 0.02. Показано е, че при различни кинематични гранични условия, газът изостава или избързва спрямо скоростта на стената, или има поведение на твърдо еластично тяло. Получените резултати са важни при решаването на неравнинни, задачи от микрофлуидиката с отчитане на ефектите на кривината.

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Петър Господинов, Добри Данков, Владимир Русинов, Стефан Стефанов - Иследвано е цилиндрично течение на Кует на разреден газ в случая на въртене на два коаксиални цилиндъра с еднакви по големина скорости, но в различни посоки. Целта на изследването е да се установи влиянието на малки скорости на въртене върху макрохарактеристиките – ρ, V , . Числените резултати са получени чрез използване на DSMC и числено решение на уравненията на Навие-Стокс за относително малки (дозвукови) скорости на въртене. Установено е добро съвпадение на резултатите получени по двата метода за Kn = 0.02. Установено е, че съществува “стационарна” точка за плътността и скоростта. Получените резултати са важни при решаването на неравнини, задачи от микрофлуидиката с отчитане на ефектите на кривината. Ключови думи: Механика на флуидите, Кинетична теория, Разреден газ, DSMC

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MSC 2010: 33-00, 33C45, 33C52, 30C15, 30D20, 32A17, 32H02, 44A05

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The Stokes perturbative solution of the nonlinear (boundary value dependent) surface gravity wave problem is known to provide results of reasonable accuracy to engineers in estimating the phase speed and amplitudes of such nonlinear waves. The weakling in this structure though is the presence of aperiodic “secular variation” in the solution that does not agree with the known periodic propagation of surface waves. This has historically necessitated increasingly higher-ordered (perturbative) approximations in the representation of the velocity profile. The present article ameliorates this long-standing theoretical insufficiency by invoking a compact exact n-ordered solution in the asymptotic infinite depth limit, primarily based on a representation structured around the third-ordered perturbative solution, that leads to a seamless extension to higher-order (e.g., fifth-order) forms existing in the literature. The result from this study is expected to improve phenomenological engineering estimates, now that any desired higher-ordered expansion may be compacted within the same representation, but without any aperiodicity in the spectral pattern of the wave guides.

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This thesis will discuss the topic architectural atmospheres, based on Peter Zumthor's works and narrative. The subject "architectural atmospheres" is defined in the study as the "complex and general condition, realized by the user during the experience of a place". Atmospheres are composed of the overlap of all physical qualities that compound a space and its perception, conditioned by individual issues of the user. The atmosphere is realized through all human body receivers, in a multi-sensorial process, and affects qualitatively the spacial experience of the places created by architecture. The study has three chapters. The first chapter is a reflection on the issues that architectural atmospheres present. It passes through the concept and definition of the subject and includes a compilation of design principles that act on the architectural atmosphere composition in a variety of projects by a range of professionals. In the second chapter, the procedures adopted by Peter Zumthor in his design process that focus on atmosphere composition are studied. In the third and last chapter, Brother Claus Chapel (Wachendorf, German) and Kolumba Museum (Colon, German) projects, both by Peter Zumthor, are analyzed, in order to comprehend the complex role of elements that constitute the architectural atmosphere of each of these places. The methodology used throughout the thesis consists of bibliography and documental analysis, based on books, plans and material searched on Internet. Furthermore, the project analysis counted with the personal experience of the author of this thesis upon visiting the studied buildings. Finally, in conclusion, it is realized that when architecture is made in order to touch the user, expressed by its built objects, it can be provide a vast conceptual and theoretical basis that valorizes and enriches the experience of its use. It (the architectural atmosphere) is related to an approach that uses the same elements of any other construction, but distinguishes itself by the connections that it implies with humans and its environment. In the face of new patterns unveiled for contemporary architecture, this study contribution is based around the opportunity to understand this particular relationship between user and architectural object, identified as a phenomenological approach of architecture, as well as to update the subject bibliography, still scarce among Brazilian universities.