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 13041 for “"Element"”.
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Element & Origin
Element & Origin is a collection of poetry and nonfiction essays that explore, among other subjects: the natural world, myth, human evolutionary biology, the landscape of the imagination, the American West, and the Atlantic coast.
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Element & Origin
Element & Origin is a collection of poetry and nonfiction essays that explore, among other subjects: the natural world, myth, human evolutionary biology, the landscape of the imagination, the American West, and the Atlantic coast.
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Modeling a bender element test using Abaqus Finite Element Program
Finite Element Methods hold promise for modeling the behavior of an unsaturated soil specimen subjected to bender element agitation. The immediate objective of this research project is to reproduce a bender element test using Abaqus Finite Element Software assuming elastic and isotropic conditions. …
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Plane frame element addition to the MESS finite element program
A plane frame element based on linear, elastic theory is developed and implemented into the MESS finite element program. Post-processed results include nodal displacements, end reactions, maximum tensile and average shear stress, and a deformed geometry plot. The element is tested for accuracy …
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Element substituted aluminophosphates
… aiming to the incorporation of the transition elements: cobalt, vanadium, and molybdenum into AlPO₄-5 molecular sieves, to the study of the redox properties of the resulting materials and to the potential application of these compounds in the partial oxidation of methane to methanol and …
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Boundary element and finite element methods for moving boundary electrochemical problems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1983.
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The evaluation of embankment stresses by coupled boundary element - finite element method
Numerical methods and specifically the finite element method have improved significantly since their introduction in the 60's. These advances were mainly in: 1) introducing higher-order elements, 2) developing effective solution schemes, 3) developing sophisticated means of modeling the …
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Development of a coupled finite element - boundary element program for a microcomputer
… describes the development of a coupled finite element — boundary element program for a microcomputer. The steps outlined in the thesis include the adaptation of a mainframe—based boundary element code for use on a microcomputer, the Verification of this program with sample problems, the …
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Multiple-Element Contingency Screening
The main focus of this work is to efficiently determine the double-outage contingencies that threaten the operation of the power system. This work is necessary because enormous numbers of double-outage contingencies exist for even relatively small systems, and new standards require system operators …
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A Hybrid Spectral-Element / Finite-Element Time-Domain Method for Multiscale Electromagnetic Simulations
… this study we propose a fast hybrid spectral-element time-domain (SETD) / finite-element time-domain (FETD) method for transient analysis of multiscale electromagnetic problems, where electrically fine structures with details much smaller than a typical wavelength and electrically coarse …
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Solution of soil-structure interaction problems by coupled boundary element-finite element method
… method for solving such problems, the finite element method, considers only the near field, and neglects the effects of the far field. Depending on the domain size considered, this results in significant errors in the computed displacements and stress compared to closed form solutions. This …
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Low-order finite element preconditioner for spectral element pressure solver in Navier-Stokes equations
High-order spectral element methods (SEM) while very accurate for computational fluid dynamics (CFD) simulations can be prohibitively expensive for meshes with difficult geometries. Controlling the number of iterations in the pressure solver can significantly reduce the computing time of CFD …
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The isotope, trace element, and major element geochemistry of the Mesozoic Appalachian tholeiite province
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1986.
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Gap Waveguide Array Element Filters
… which are directly integrated with antenna array elements are known as array element filters. The first filter is a third order filter centred at 100 GHz with a bandwidth of 4 GHz and 20 dB of passband return loss that was used to develop several filter components for the other filter designs. The …
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Exascale finite/spectral element simulations
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-08-01
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Hybrid stress finite element method
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1986.
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Mixed-Field Finite-Element Computations
… propagating modes in waveguides via the finite-element method. The variational form of the Direct method is derived to ensure that an extremum is reached. The Direct method uses Maxwell's equations directly, both zero and first-order, scalar and vector bases that are used in the finite-element …
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