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 136 for “"Three-Dimensional Model"”.
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A three-dimensional model of human lip motion
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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A Three-dimensional Model of Poroviscous Aquifer Deformation
A mathematical model is developed for quantification of aquifer deformation due to ground-water withdrawal and, with some modifications, is potentially applicable to petroleum reservoirs. A porous medium saturated with water is conceptually treated in the model as a nonlinearly viscous fluid …
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A THREE DIMENSIONAL MODEL OF HUMAN HEPATO-BILIARY ORGANOGENESIS
… thesis project was to generate a 3D in vitro model of liver tissue using tissue engineering strategies that can recapitulate fetal liver development. There are two key components to our in vitro model: acellular liver scaffold discs that provide 3D native liver tissue microarchitecture and …
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A Three Dimensional Model of Virus Dynamics in HIV Patients
<p>Mathematical models have been of great importance when attempting to analyze problems that are faced by society. With the widespread outbreak of HIV, many models have been established to explain some of the characteristics of the HIV infection. In this research, we use a three dimensional model …
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Salinity Transport in a Finite-Volume Sigma-Layer Three-Dimensional Model
The objective of this study was to develop a 3-D model for The Pontchartrain Estuary that was capable of long-term mass conservative simulation of salinities. This was accomplished in a multi-stage approach involving: a physical model of salinity exchange through a pass; a 3-D FVCOM model of the …
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Examining a Three-Dimensional Model of Competitive State Anxiety in Sport
… impairments. Taking this into consideration,a three-dimensional model explaining the potential adaptive nature of anxiety was proposed by Cheng et al. (2009); however, little research has tested this model since its development. Subsequently, this thesis reassessed the measurement model because …
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Estimation of kinetics using a three-dimensional model of the human body
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Using a Three-Dimensional Model to Understand Age Differences in the Framing Effect
… study used a between-subjects design with three instruction conditions to investigate susceptibility to the framing effect among younger, middle-aged, and older adults. Participants were instructed to pay attention to the facts and numbers, to use their gut feelings, or to use their …
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A global three-dimensional model of the circulation and chemistry of long-lived atmospheric species
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Meteorology and Physical Oceanography, 1982.
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Hydrodynamics of mine impact burial
A general physics based hydrodynamic flow model is developed that predicts the three-dimensional six degrees of freedom free fall time history of a circular cylinder through the water column to impact with an unspecified bottom. Accurate vertical impact velocity and impact angle parameters are …
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Three dimensional reconstruction of plant roots via low energy x-ray computed tomography
… computed tomography to visualize plant roots in three-dimensions and to quantify their complexity in a non-invasive and non-destructive manner. However, they used expensive and less accessible industrial or medical tomographic systems. This research uses an inexpensive, lab-built X-ray computed …
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Modello di calcolo multifisico per la progettazione dei requisiti acustici, energetici ed illuminazione naturale degli edifici
Multi physical calculation model for the design of acoustic requirements, energy and natural lighting of buildings interfaced with three-dimensional CAD architectural. The model calculates with single procedure the physical performance of buildings by taking the geometric information from the …
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The Development of an Occupational Classification and Scales
… derived from the occupational groups. Multidimensional scaling applied to the relations among the 31 interest scales yielded a three-dimensional configuration. The dimensions of the three-dimensional model were found to be People vs. Things, Dynamic vs. Structural, and Prestige. Sex type was …
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The Effect of Shear Flow on Solidification Microstructures
… equilibrium and conservation of mass. A three dimensional model of the solidifying interface is constructed, and the velocity, temperature and concentration fields are calculated for a wide range of alloy compositions and process conditions.
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An automated matching algorithm for dual orthogonal fluoroscopy
… images, often by hand, and registration of three-dimensional models with two-dimensional contours. Automation of these processes would greatly accelerate research in this field. This research presents an automated method for recovering the pose of a three dimensional model from planar …
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Percolation Paths of Three-Dimensions in Sensitized Stainless Steel
The study of three-dimensional percolation paths through materials is important in its contribution to understanding defect sensitive properties of materials. This work shows the importance of grain boundary character in modeling defect sensitive boundaries. Also presented are trends of percolation …
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Three-dimensional finite element modeling of steady state seepage using the computer program 'SEEPS3D'
A three-dimensional finite element model for the analysis of steady state seepage has been presented in this study. The theory of unsaturated flow has been used in the analysis of steady state seepage. The model applies the invariant mesh procedure in the finite element analysis. Galerkin's method …
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Improved methods for forward and inverse solution of the wave equation for piles
… was analyzed in two ways: forward (the hammer is modeled and the pile response and capacity for a certain blow count is estimated) or inverse (the force-time and velocity-or displacement-time history from driving data is used to estimate the pile capacity.) The finite element routine developed was …
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