Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 536 for “"stefan"”.
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Stochastic Stefan problems: existence, uniqueness, and modeling of market limit orders
… on moving boundary value PDE's with Stefan boundary conditions, or Stefan problems, and show the existence and uniqueness of the solutions to a number of stochastic equations of this kind. We also derive the space and time regularities of the solutions and the associated boundaries …
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A Spatial Stefan Problem Modified by Natural Convection: Melting Around a Horizontal Cylinder
… melting and heat transfer are determined by the Stefan number, St. St is the ratio of thermal energy available in the melt to the thermal energy needed to melt the solid. During the transition stage, convection heat transfer becomes important. In the final convection stage, natural convection is …
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Radiation of strongly interacting particles by thermal sources: Violation of the Stefan-Boltzmann law
… interact. With such strong interactions, the Stefan-Boltzmann law would not accurately describe the properties of the radiation. This thesis discusses two different regions of a strongly interacting gas around a thermal source: the region where the gas can be accurately described by a perfect …
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Examining the presence of anchoring and adjustment in stock market investment decisions by Stefan Els.
With three major stock market crashes in less than two decades, understanding the forces at work in the modern stock market is more important than ever before. The anchoring and adjustment heuristic has often been described as one of the psychological forces influencing investment decisions but …
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"""The Form Must Be Ripped Endlessly Open"": Narrative and Gesture in the Late Music of Stefan Wolpe"
Two of the gesture types identified relate directly to Wolpe's preoccupation with opposition: interruption and clearing. The interruption gesture type occurs frequently as means to introduce and integrate extreme contrasts. Influencing the music on a more global scale, the clearing gesture is a …
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"Translation or adaptation? authors writing in a second language: an analysis of Stefan Heym's ""Hostages"" and ""Der Fall Glasenapp"""
… Hostages (1942) / Der Fall Glasenapp (1958), by Stefan Heym and seeks to answer the question whether or not the translation truly is a translation or an adaptation of the original novel.
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New results in stochastic moving boundary problems
… of one-dimensional moving boundary problems: the Stefan problem, which describes the melting of the ice, and a free boundary problem proposed by Ludford and Stewart and studied by Caffarelli and Vazquez. In the first part, we consider a one-dimensional Stefan problem perturbed by a multiplicative …
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On convection and stability of some welding and solidification processes
… with flow is used to compare a sharp interface Stefan model and a diffuse interface phase-field model. Firstly a Stefan model that includes a disparity between the density of the solid and liquid phases is derived and solved numerically. This model is compared with a recent phase-field model …
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Schur's Complement and Discontinuous Galerkin Methods for Domain Decomposition Solvers and Plasticity and Interface Evolution Analyses
… we demonstrate our method by analyzing the Stefan problem of solidification.
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A droplet evaporation model for high temperature and pressure spray applications
… heat and mass transfer due to surface blowing (Stefan flow) is included, and heat transfer in the liquid is calculated using the effective conductivity model which accounts for internal circulation. The single droplet evaporation model has been implemented and tested into the KIVA …
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Modeling the chemical, diffusional, and thermal processes of a microreactor
… to describe the gas flow. Finally, Maxwell-Stefan equations were implemented in order to capture the concentration and temperature dependence of the various species diffusivities. For characterizing the thermal profile, convective, conductive, and radiataive heat transfer modes were all …
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Modelling calcite dissolution in a rotating disc reaction vessel
… the bulk chemistry, but is also connected with a Stefan condition for dissolution interface, treating it as a free boundary. The substantial difference in the order of magnitude of the various reaction rates decouples the system. The relatively slow speed of the moving interface allows for a …
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Člověk jako zoon politikon a filosofie jako výchova člověka (Býti na světě lidsky prostřednictvím zkušenosti s řečí)
… and non-entity of a thing from the poem by Stefan Georg titled The Word (Das Wort) - to contemplate on the assumptions and limits of the apprehension of the philosophically-educative questioning as the nurture towards thinking, which should inevitably be preceded by the knowledge about what …
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Kontrolle freier Ränder bei der Erstarrung von Kristallschmelzen
… Der Erstarrungsprozess wird durch ein Zweiphasen-Stefan-Problem mit durch Konvektion und Lorentzkräfte getriebener Strömung beschrieben. Der freie Rand wird als Graph formuliert. Das Kontrollziel besteht in der Ansteuerung eines gewünschten Verlaufs des freien Randes. Als Kontrollgrößen dient die …
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Emissivity of patterned silicon wafers in rapid thermal processing
… is used to adjust the temperature. By using the Stefan-Boltzmann T^4-law, a heat balance equation describing the incoming and outgoing heat can be derived. This heat balance equation can be used to calculate the spatial temperature differences due to different emissivities of the various thin …
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Comparison of heat flux standards for calibrating heat flux gages at elevated temperatures and high heat flux levels
… temperature of a blackbody heat source and the Stefan-Boltzmann law. The heat flux gage employed in this standard is a water-cooled Gardon gage. This standard does not operate at high temperatures. The calibration of this standard produced highly repeatable results.
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Three Essays on Labour and Public Economics
… The second chapter, co-authored with Stefan Staubli and Qiongda Zhao, studies the long-run effects of changing the early eligibility age (EEA) for old-age pensions, a common policy to alleviate fiscal pressure on public pension systems. While prior work has focused on short-term labor …
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Peter Jona Korn: An Introduction to His Works for the Oboe
… century, as he, like Arnold Schoenberg, Stefan Wolpe, and Kurt Weill, was forced to flee Germany to escape Nazi persecution. However, unlike composers who turned away from tonality, searching for other modes of expression after the war, Korn remained committed to composing in a largely …
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A Visual Studies Approach To Critical Historiography
… critical historiography, a term first used by Stefan Berger and later by Mark Jarzombek, is worthy of extensive development as a discourse. Furthermore, it calls for both intra- and interdisciplinary research regarding the meaning, relevance, and application of critical historiography and its …
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pQCD energy loss and thermal field theory in small systems
… presenting significant deviations from the Stefan-Boltzmann limit and revealing a geometrically driven phase transition at the scale of the medium.
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