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 40 for “"Single-Field"”.
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A Single-Field Finite-Difference Time-Domain Formulations for Electromagnetic Simulations
<p>In this dissertation, a set of general purpose single-field finite-difference time-domain updating equations for solving electromagnetic problems is derived. The formulation uses a single-field expression for full-wave solution. This formulation can provide numerical results similar to those …
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"Transistor-Like" Spin Nano-Switches: Physics and Applications
… integrated spintronics and nanomagnetics into a single field, creating a new class of spin-based devices that are now being widely used in magnetic memory devices. However, it is not clear if these advances could also be used to build logic devices.
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Commissioning of Micro-Cube Thermoluminescent Dosimeters For Small Field Dosimetry Quality Assurance In Radiotherapy
<p>Small field dosimetry presents complications and uncertainties that could be circumvented by using detectors which are smaller than the radiation field. This study evaluates the reproducibility and accuracy of TLD micro-cubes for use in stereotactic radiosurgery (SRS) remote auditing quality …
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Probing the Cosmological Initial Conditions Using the CMB
… of fNL=0 at 2.8sigma, disfavoring canonical single field slow-roll inflation. The signal is robust to variations in lmax , frequency, and masks. No known foreground, instrument systematic, or secondary anisotropy explains it. We explore the impact of several analysis choices on the quoted …
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High-Energy Aspects of Inflationary Cosmology
… and the underlying short-distance dynamics of single-field inflation. We obtain a constraint on the size and the sign of the four-point function in terms of the amplitude of the three-point function. We then study the imprints of extra massive particles of arbitrary spin on the three-point …
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Métodos de elementos finitos mistos e malhas adaptativas na análise de cascas axissimétricas
… on the thickness of the shell. Classical single field as well as two fields finite element formulations are discussed. A consistent mixed Petrov-Galerkin formulation is considered in order to achieve both stability and accuracy. It consists in adding to the classical Galerkin formulation a …
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Refining the multi-field effects of Higgs inflation
… extent to which the inclusion of multiple scalar fields in models of Higgs inflation produces observable departures from the single field case. I designed simulations to numerically solve the differential equations of motion in the Einstein frame governing the evolution of two nonminimally coupled …
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Development of discontinuous Galerkin method for nonlocal linear elasticity
… within the Toupin-Mindlin framework. The single-field displacement method obtained enables the discretization of the boundary value problem with a conventional continuous interpolation inside each finite element, whereas the higher-order interelement continuity is enforced in a weak …
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SAGE: Segmenting and Grouping Data Effectively using Large Language Models
… non-overlapping ranges that segment a single field into groups; highlights are multi-field intersections of ranges that surface broader groups in the data. We integrate these structures into Olli, an open-source tool that converts data visualizations into accessible, keyboard-navigable …
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Preheating in multifield inflation
… of high-energy physics require multiple scalar fields. Renormalization of these fields in curved space-time requires these fields to be nonminimally coupled to the space-time Ricci scalar. These couplings induce a nontrivial field-space manifold when we move from the Jordan frame to the Einstein …
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Worldview of Janina Degutytė: Poetry, Letters, and Autobiographic Texts /
… ever discussed in previous research, into a single field of analysis. The entire text of the Dissertation is structured as a single narrative that covers separate profiles of the worldview, identified and analysed as key plots in Degutytė’s texts, and offers an insight into the development of …
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ΑΝΑΛΥΤΙΚΕΣ ΜΑΓΝΗΤΟΥΔΡΟΔΥΝΑΜΙΚΕΣ ΙΣΟΡΡΟΠΙΕΣ ΤΟΡΟΕΙΔΟΥΣ ΑΞΟΝΙΚΑ ΣΥΜΜΕΤΡΙΚΟΥ ΠΛΑΣΜΑΤΟΣ ΣΥΝΤΗΞΗΣ
… EQUILIBRIUM STATES OF THE TOKAMAK, THE REVERSED FIELD PINCH AND THE COMPACT TOROIDS. THE STUDY INCLUDES STATIC AND STATIONARY EQUILIBRIA, AS WELL AS FORCE FREE CONFIGURATIONS RELEVANT TO THE SPHEROMAK PLASMA RELAXATION. MORE SPECIFICALLY. FIRST, IN ORDER TO DERIVE STATIC EQUILIBRIA OF ARBITRARY …
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Numerical simulation of fragmentation and spalling and parallelization of a spacetime finite element code
… procedure, higher efficiency of the three-field SDGFEM formulation compared to the single-field formulation and linear complexity in the number of space-time elements make the SDGFEM very suitable for parallelization. Based on code profiling, the assembly and solution stages of the code are …
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Characterising variation in the gene for the Dichelobacter nodosus Type IV fimbrial protein: Development of a molecular typing system
… of the fimA gene. Cloning and sequencing of a single field derived amplimer and eight cultures currently being used in commercial footrot vaccines (Mallinckrodt Veterinary Ltd), is described. The rimA sequences exhibited varying degrees (89-100%) of homology to the prototype Australian strains …
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Protein regulation in Trichodesmium and other marine bacteria: observational and interpretive biomarkers of biogeochemical processes
… Trichodesmium colonies captured from a single field site, and identified significant variability related to iron acquisition from mineral particles. Next, I investigated diel proteomes of cultured Trichodesmium erythraeum sp. IMS101 to highlight its physiological complexity and …
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Magnetic reversal of artificial spin ice
… transport properties for finely varied magnetic field directions, I find that the vertices of connected brickwork artificial spin ice control its transport characteristics despite their relatively small extent. In addition, I find that the ground state of the system can be achieved by a single …
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Post-inflationary non-Gaussianities on the cosmic microwave background
… generated during inflation, the single-field slow-roll inflation of the standard model is known to produce negligible non-Gaussianities. However, post-inflationary processes guarantee the generation of non-Gaussianities through the nonlinear evolution of our universe after …
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Deep learning methods for shear log predictions in the Volve field Norwegian North Sea
… shear log predictions using data from the Volve field, in the Norwegian North Sea. In this thesis I use deep neural networks or feedforward neural networks, and I propose convolutional neural networks and recurrent neural networks, to predict shear logs from gamma ray, bulk density, neutron …
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Charting the hippocampal cognitive map: Investigating the emergence of grid cell and place cell firing patterns in novel and familiar environments
… framework of this thesis is guided by the Field-boundary interaction model which argues that place cells may play a more fundamental role in shaping the emerging grid cell spatial pattern in novel environments. We show that over a three-hour novel environment trial place and size-matched …
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Population Structure, Aggressiveness, and Molecular Genetic Variability of Sclerotinia Sclerotiorum
… hosts and geographic locations, from soybean fields in Argentina, and DeKalb and Watseka, Illinois were assessed. Among 301 isolates tested, 42 MCGs were identified, and 61% were represented by single isolates observed at a single location. Within the Diverse Set, 17 MCGs were identified. Each …
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