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.
Results
Showing 1 to 20 of 42 for “"Gravity models."”.
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Effects of Quantitative Restrictions on U.S. Textile and Apparel Imports over 1995-2010: An Analysis using Gravity Models
… Comtrade) database. In this research, three gravity equations were developed and estimated based on the existing gravity model. The first gravity equation was estimated to assess the effects of the independent variables commonly included in gravity models on the total value of U.S. textile …
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Economic Integration in ASEAN Region, and International Trade linkages with FDI, Tourism and Environment - Analysis and Evaluation of trade determinants at SITC I Industry Sector Level Using Four Gravity Models
… and empirically proven general equilibrium gravity framework. This empirical research examined the interrelationship between export trade, on one side, and FDI, tourism and environment externalities. It estimated the impact of the aforementioned RTAs including AEC formation, particularly …
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Economic Integration in ASEAN Region, and International Trade linkages with FDI, Tourism and Environment - Analysis and Evaluation of trade determinants at SITC I Industry Sector Level Using Four Gravity Models
… and empirically proven general equilibrium gravity framework. This empirical research examined the interrelationship between export trade, on one side, and FDI, tourism and environment externalities. It estimated the impact of the aforementioned RTAs including AEC formation, particularly …
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A f(R)esh take on gravity
… thesis explores perturbations in f(R) modified gravity theories, with a focus on understanding the growth of large-scale structures in the Universe. Modified gravity models, particularly f(R) theories, offer an alternative explanation for cosmic acceleration without invoking dark energy. The …
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Geophysical investigation of Vesta, Ceres and the Moon using gravity and topography data
The shape and gravity field are fundamental properties of a planetary body. Combining gravity and topography data sets is, arguably, the most powerful tool to study planetary interiors from orbit. However, even when gravity and topography data are in hand, typically, a wide range of possible …
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Eddy dynamics of ß plumes
… in the deep ocean was investigated using reduced gravity models of the deep ocean forced by a small region of cross isopycnal transport in the interior. The effect of topography on ß-plumes was also examined by placing a Gaussian bump in the forcing region. Despite the fact that the mean flow is …
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Gravity Modeling, Seismic Stratigraphy, and Thermal Maturity Modeling of Hydrocarbons of the Permian Foreland Basin, USA, and the Sergipe-Alagoas Rifted-Passive Margin, Brazil
… two basins. In Chapter 2, I created 2D and 3D gravity models to better define the tectonic origin of the Abilene gravity minimum (AGM) underlying the northern Permian Basin. I inferred the AGM as a Precambrian rift zone composed of lower density granitic and metasedimentary rocks. Basement …
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Correlation of seismic reflection data with seismicity over the Ramapo, New Jersey, fault zone
Reflection seismic data, mylonite reflectivity, gravity data, and earthquake hypocenters have been integrated into a possible explanation for seismicity in the Ramapo fault area. Seven reflection seismic lines were processed using variations in sorting and residual statics. Single VIBROSEIS sweeps …
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Mesozoic Rift Evolution and Crustal Structure of the Gulf of Mexico Basin from Integration of Multiple Geological and Geophysical Datasets
… This dissertation integrates satellite free-air gravity data, full-tensor gravity gradient data, 104,000 line-kilometers of 2D reflection data, and publicly available refraction data and deep wells over 4.2 million km2 to improve our understanding of the GOM rift history. Chapter 1 summarizes the …
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A social networks framework to study the influence of language on international trade in services.
… number of studies explaining trade focus on the gravity model and estimate varieties of transformations. The literature widely measures the effect of language in gravity models using a dummy variable indicating the presence of common language between trading countries, and recently developed …
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Three Essays in Financial Economics
… most of the econometric limitations of the Tobit models, widely employed previously within this literature. The third essay quantifies the welfare gains from trade for the Eurozone countries. We apply a trade model that allows us to estimate the increase in real consumption as a result of trade …
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Multi-modal public transport modelling under traffic disruptions
… assessment. Our approach extends the traditional Gravity Models-based OD estimation method by incorporating entropy-weighted calibration to fuse traffic characteristics, such as travel time, distance and fare cost, with topological features including connections, closeness and straightness. This …
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New aspects of black hole scalarization in alternative theories of gravity
… scalarization of black holes in extended gravity models. We study two scenarios in which a scalar field develops non-trivial configurations (“hair”) around charged black holes. In the first scenario, a charged black hole is subject to both a tachyonic (instability-driven) coupling and a …
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Classical, quantum and numerical aspects of modified theories of gravity
… some specific aspects of two classes of modified gravity theories: ghostfree infinite-derivative gravity and so-called f(R) gravity. Regarding the former, we consider the four-dimensional theory at the level of the quadratic action and study the single graviton exchange of two massive spin-0 …
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Seismic investigation of the Matador Arch and Central Basin Platform
… beneath mafic intrusions in the upper crust. Gravity anomaly maps, known basement rock location and composition from well data, and gravity models are compared to topographic maps of the Moho and midcrustal discontinuity. Seismic signature in the lower crust and depth to the Moho suggest a …
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The Effective Field Theory Approach to Fluid Dynamics, Modified Gravity Theories, and Cosmology
… properties and dissipative effects. Cosmological models can be built by naturally coupling the fluid EFT to gravity. From the EFT point of view, GR is the unique low energy theory for the spin-2 graviton field and any infrared modification corresponds to adding new degrees of freedom. We focus on …
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Geophysical constraints on the flexural subsidence of the Denver Basin
… American craton. A ~400 mGal negative Bouguer gravity anomaly exists over the Denver Basin and Front Range Uplift, with its minimum located over the highest topography in the central part of the uplift, approximately 100 km west of the Denver Basin. This study examines three hypotheses …
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Trade and investment effects of free trade agreements: The case of Vietnam
… the random effects technique to estimate the gravity models, the first study reveals that the bilateral trade agreements with the US and Japan have resulted in the greatest expansion in Vietnamese exports and imports, while the impacts from other RTAs are more mixed. Furthermore, the impacts …
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Human mobility and spatial models for infectious disease
… human mobility in spatial metapopulation models for the spread of influenza in the US and UK – using gravity models with data-based distance metrics and using survey mobility data from the BBC Pandemic project and the 2011 UK census. Our metapopulation models describe the spread of …
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Bootstrap Techniques in Flat Space and Cosmology
… window into the perturbative regime of quantum gravity. Since the primordial perturbations were produced in the highly energetic early Universe, they can in principle be used to distinguish between different quantum gravity models. It is therefore essential to develop methods of deriving their …
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