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 94 for “"Physical modeling"”.
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Physical modeling of lateral variations in transient electromagnetics
Includes bibliographical references.
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Stochastic and physical modeling of fundamental biological processes
Modeling is a necessary tool to understand the large volumes of data generated from quantitative experiments on biological systems. It combines our knowledge of a phenomenon into a succinct mathematical or computational description. In this dissertation, we first describe briefly two applications …
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SENSPECTRA : an elastic, strain-aware physical modeling interface
Senspectra is a computationally augmented physical modeling toolkit designed for sensing and visualization of structural strain. The system functions as a distributed sensor network consisting of nodes, embedded with computational capabilities and a full spectrum LED, which communicate to neighbor …
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Physical modeling of local scour around complex bridge piers
… laboratory models were fabricated with physical scale ratios that modeled the full river and bridge cross sections to consider the effect of river bathymetry and bridge geometry. Three different sizes of sediment and several geometric scales of the bridge pier models were used in this …
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Mathematical and physical modeling of flip-chip soldering processes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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More than skin deep : physical modeling of facial tissue
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Architecture, 1989.
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Physical Modeling and Control of Low Temperature Combustion in Engines
The topic of this thesis is model-based control of two combustion engine concepts, Homogeneous Charge Compression Ignition (HCCI) and Partially Premixed Combustion (PPC), using physics-based models. The studied combustion concepts hold promise of reducing the emission levels and fuel consumption of …
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Physical modeling of electrical conduction in printed circuit board insulation
… special emphasis is placed on understanding the physical processes underlying the degradation, so that accelerated reliability tests can be specified with increased confidence of their validity. As a first case,printed circuit board (PCB) insulation was selected as a target for investigation. …
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Micro-physical modeling of aircraft exhaust plumes and condensation Trails
… grid cells and therefore neglect micro-physical processes, such as contrail formation, occurring in aircraft wakes. This assumption leads to inaccurate estimates of NOy partitioning, and thus, an over-prediction of ozone production. To account for non-linear plume processes, a Lagrangian …
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Physical Modeling and Analysis of Seismic Data from a Simulated Fractured Medium
This thesis studies the physical seismic modeling of a simulated fractured medium to examine variations of seismic re ection amplitudes with source-receiver o set and azimuth (AVAZ). The intent is to extract information about the fracture orientation and magnitude of the anisotropy of a naturally …
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Physical modeling of wind turbine generators in a small scale analog system
This project represents the physical modeling and experimental test of a Doubly-fed Induction Machine (DFIM), in order to substantially analyze the characteristic behaviors of wind turbines and its use in the micro-grid network. The environment set-up is based on a smart micro-grid system, which …
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Physical modeling of base carrier lifetime and frequency response of heterojunction bipolar transistor
… heavy base doping, this work demonstrates the physical modeling of the quantum-well heterojunction bipolar transistor, known as the transistor laser. By revising the conventional bipolar junction transistor charge control model, this work accounts for the degraded base transfer ratio, which …
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Physical modeling of pile load tests in sand using the similitude and compressibility concepts
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Experimental characterization and physical modeling of resolution limits in proximity printing x-ray lithography
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1991.
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Physical Modeling of Silicon Carbide Power Junction Field Effect Transistor and Model Levels For Semiconductor Devices
… power semiconductor devices due to its superior physical properties in terms of switching speed, breakdown voltage, maximum operating temperature, high thermal conductivity, high current density, and extremely stable chemical characteristics. Currently, 1200V/20A SiC junction field effect …
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USE OF POPE ENGAGEMENT INDEX TO MEASURE COGNITIVE LOAD OF PHYSICAL MODELING ACTIVITIES IN ORGANIC CHEMISTRY
… process information is critical to developing physical modeling activities that facilitate student learning by decreasing cognitive load in the working memory. Optimizing cognitive load during physical modeling activities in organic chemistry is the key to effective and efficient learning. …
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Postural control in persons with multiple sclerosis: an investigation of dual task cost and physical modeling
Postural control is an essential activity of everyday life. There is ongoing debate concerning the contribution of central and peripheral control processes to the control of upright stance. Multiple sclerosis is known to negatively influence both central and peripheral control processes. This work …
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Model-Based Design of an Electric Powertrain Vehicle; Focus on Physical Modeling of Lithium-ion Batteries
Formula SAE (FSAE) vehicle systems are very complex. Understanding how subsystems effect the overall vehicle is essential for making design trade-offs. FSAE is a competitive environment. Teams need to have reliable and high performing vehicles to do well in competition. The Virginia Tech (VT) FSAE …
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