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 1727 for “"Forcing."”.
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Sigma_n-correct Forcing Axioms
… extending ZFC set theory, the Sigma_n-correct forcing axioms. These assert roughly that whenever a forcing name <em>a'</em> can be forced by a poset in some forcing class Gamma to have some Sigma_n property phi which is provably preserved by all further forcing in Gamma, then <em>a'</em> …
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Forcing in Analysis and Combinatorics
… thesis, we explore some new applications of the forcing technique in the context of Analysis and Combinatorics by: (1) Constructing a model of Set Theory in which strong measure zero subsets of the real line are meager-additive while Borel’s conjecture fails, answering a long-standing question …
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Resonant Forcing of Nonlinear Systems
… in an experimental system are accessible to forcing. We find that certain Lagrange multipliers take on a fundamental physical role as the efficiency of the forcing function and the effective forcing experienced by the degrees of freedom which are not forced directly.
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Forcing mechanisms of thunderstorm downdrafts
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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Resonance Forcing in Catalytic Surface Reactions
… Resonanzen des Verhältnisses Anregungsfrequenz (forcing frequency) zur mittleren natürlichen Fourier-Eigenfrequenz(natural frequency) der Katalysatorfläche betrieben. In der 2:1 Resonanz kann die chemische Turbulenz durch die erzwungenen Schwingungen unterdrückt werden. Mit steigender Amplitude …
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Large-scale forcing of coastal communities
Two contrasting areas of pelagic primary productivity (PPP) were noted in western Scotland, the Clyde (high PPP) and the west coast (low PPP). It was hypothesised that increased PPP would have a direct bottom-up influence on intertidal community structure with the Clyde expected to be dominated by …
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Forcing ℵ1-free groups to be free.
… necessary and sufficient condition for when such forcings are possible. We also identify both existing and novel forcings which force such ℵ1-free groups of size ℵ1 to become free with cardinal preservation. These forcings lay the groundwork for a larger project which uses forcing to explore …
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Augmenting Wireless Security Using Zero-Forcing Beamforming
… construct simultaneous data streams using Zero-Forcing Beamforming (ZFBF). Instead of using this technique for simultaneous data stream generation, STROBE utilizes ZFBF by allowing an AP to use one stream to communicate with an intended user and the remaining streams to orthogonally "blind" …
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Cavity Flows Control by High Frequency Forcing
… range of flow conditions. Additionally, this forcing can be generated by a simple Von Karman wake. In this way both advantages, simplicity and a wide operational range, can be achieved at the same time. The physical mechanisms leading to cavity flow control by high frequency forcing is not …
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Variations of zero forcing and power domination
<p>Zero forcing is a propagation process on a graph that turns white vertices into blue vertices. In this process, an initial set of vertices in a graph $G$ are chosen to be blue and all others are colored white, then a color-change rule is iteratively applied until all of $G$ becomes blue. A large …
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Forcing of globally unstable jets and flames
… by the way its heat release responds to acoustic forcing. This response depends on the hydrodynamic stability of the flame. Some flames, such as a premixed bunsen flame, are hydrodynamically globally stable. They respond only at the forcing frequency. Other flames, such as a jet diffusion flame, …
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Atmospheric Predictability in the Presence of Tropical Forcing
We investigate the impact of tropical forcing on the predictability of the atmosphere in a two-layer spectral model. The focus is on the improvement of extended range forecasts in the extratropics from knowledge of the tropical forcing. The model-twin approach is used to perform forecast …
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Coastal ocean variability off the coast of Taiwan in response to Typhoon Morakot : river forcing, atmospheric forcing, and cold dome dynamics
The ocean is a complex, constantly changing, highly dynamical system. Prediction capabilities are constantly being improved in order to better understand and forecast ocean properties for applications in science, industry, and maritime interests. Our overarching goal is to better predict the ocean …
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Coastal ocean variability off the coast of Taiwan in response to typhoon Morakot : river forcing, atmospheric forcing, and cold dome dynamics
The ocean is a complex, constantly changing, highly dynamical system. Prediction capabilities are constantly being improved in order to better understand and forecast ocean properties for applications in science, industry, and maritime interests. Our overarching goal is to better predict the ocean …
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Surface forcing of the North Atlantic: accuracy and variability
A new methodology to estimate the turbulent air – sea heat and moisture fluxes and<br/>their uncertainty is developed and assessed using Voluntary Observing Ship (VOS)<br/>observations. Whilst important drivers of the global oceanic and atmospheric circulation<br/>these fluxes remain poorly …
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The Iranian Triad: Forcing a Strategic Decision in Tehran
The acquisition of nuclear weapons by Iran would instantly be the gravest threat of the young century; and time is running out to prevent radical hardliners in Tehran from attaining such capabilities. If the status quo is unchanged, the U.S. will soon be forced to choose between accepting a …
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On surface versus atmospheric forcing in regional climate simulations
… experiments to contrast surface and atmospheric forcing in regional climate simulations. Results of the first paper showed that a transient increase in soil moisture enhanced domain total rainfall. The increase in soil moisture enhanced local rainfall when the lower atmosphere was thermally …
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