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 29 for “"dynamic characterization"”.
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Static and dynamic characterization of tied arch bridges
… element analysis to determine both static and dynamic characteristics. Moreover, contemporary evolutions and innovations are presented as are comparisons between Load Factor Design and Load and Resistance Factor Design.</p><p>Four bridges, all spanning major rivers in the Midwest, are at the …
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Dynamic characterization of thermal death of bacterial spores
Thesis: M.S., Massachusetts Institute of Technology, Department of Food Technology, 1960
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Instrumentation and Dynamic Characterization of the Galena Creek Bridge
… experiments conducted to characterize the dynamic properties of the structure in its baseline condition.A system of accelerometers was installed for this project in the superstructure of the bridge and several experiments were performed to determine its basic dynamic characteristics. Live …
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A Comparison and Evaluation of Different Dynamic Characterization Approaches for Bridges
… of this thesis was to compare different dynamic characterization approaches for full scale bridge structures to devise a rapid and reliable Structural Health Monitoring (SHM) program in the aftermath of a natural or manmade hazard. Present methods for structural condition evaluation of …
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Dynamic Characterization of Wide Bandgap Devices for Power Electronic System Integration
… power electronic systems. However, the dynamic stresses induced by application-specific conditions present limited physical and behavioral understanding, posing critical concerns for reliability and performance degradation. Therefore, this dissertation presents novel characterization …
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Design, development, and dynamic characterization of multi-axis force sensing composite footpad
… footpad sensor must also be characterized dynamically prior to its implementation with the MIT Cheetah robot. This study includes the design, development, and dynamic characterization of the footpad sensor. In order to characterize the developed footpad sensor dynamically, a custom impact …
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Static and Dynamic Characterization of Silicon Carbide and Gallium Nitride Power Semiconductors
… these wide-bandgap materials. The static and dynamic characterization of six different SiC MOSFETs from different manufacturers are presented. The static characterization consists of the output characteristics, transfer characteristics and device capacitances. High temperature (up to 150 °C) …
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Dynamic Characterization of the IKK:κBα:NFκB Negative Feedback Loop Using Real-Time Bioluminescence Imaging
… loop exhibits differential and reproducible dynamic patterns in response to modulation of TNFα; concentration or pulse duration, and that responses to TNFα exhibited a remarkable degree of synchronicity at the level of single cells, cell populations, and in vivo. Furthermore, we discovered a …
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Dynamic characterization and active control of unstarts in a near-isentropic supersonic inlet
A near-isentropic supersonic inlet, at Mach 2.2, has been designed to give enhanced recovery and thus increased range for a supersonic transport aircraft. In such a design a mixed compression inlet design is typically used. Enhanced recovery of 97% in total pressure is achieved by reducing the …
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Global Dynamic Characterization and Load Rating of Bridge Structures Utilizing Economical Dynamic Excitation Devices
… system is then validated for MIMO EMA by dynamically characterizing a large-scale laboratory structure and comparing the results to those from traditional excitation methods. The system is then deployed on an in-service highway bridge, representing the first time that more than two shakers …
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Acoustic impedance inversion for static and dynamic characterization of a CO₂ EOR project, Postle field, Oklahoma
Includes bibliographical references (leaves 86-89).
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A Study on the Dynamic Characterization of a Tunable Magneto-Rheological Fluid-Elastic Mount in Squeeze Mode Vibration
This research undertakes the task of static and dynamic characterization for a squeeze mode Magneto-Rheological (MR) Fluid-Elastic mount. MR fluid's variable viscosity rate is advantageously used to develop a mount capable of mitigating input vibrations of varying magnitudes and frequencies …
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Energetic and dynamic characterization of the IgA1:FcαRI interaction reveals long-range conformational changes in IgA1 upon receptor binding
… were focused on elucidating the energetic and dynamic elements inherent to the FcαRI:IgA interaction, with the ultimate goal of understanding the interaction at the molecular level. This knowledge will provide an important basis for the potential development of future therapeutics targeted at …
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Microstructure, Quasi-Static, And High-Strain Rate Dynamic Characterization Of Metakaolin And Fly Ash Based Geopolymers For Structural Applications
… This thesis compares the quasi-static and dynamic properties of both a pure metakaolin geopolymer and a fly ash based geopolymer material system that utilizes siliceous sand as fine aggregate. Microstructural characterization studies included Scanning Electron Microscope (SEM), Energy …
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A framework for dynamic characterization and short-term thermal capability assessment of electric machines and inverters in motor drives
… designs. This dissertation presents motor-drive characterizations to illuminate the full extent of their peak capabilities and control strategies to safely attain peak torque. Vector-controlled induction machine torque capabilities are assessed and limiting factors are investigated. Static and …
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High Temperature Characterization and Analysis of Silicon Carbide (SiC) Power Semiconductor Transistors
… Laboratories. To carry out this work, static characterization of each device was performed from 25 ºC to 200 ºC. Dynamic characterization was also conducted through double-pulse tests. Accordingly, this thesis describes the experimental setup used and the different measurements conducted, …
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Robust Optimal Control of Step Motors by Lead Angle Selection (Incremental Motion)
… a move is presented. Motor and load models for dynamic characterization are discussed, along with variable observers and parameter identifiers.
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Dynamic response evaluation of fiber-reinforced composite bridge decks and bridges
… vibrations and may substantially increase the dynamic amplification of induced stress and deflections. Also, a global NDE technique using dynamic characterization is necessary to ensure the long term performance of FRP bridges. Therefore, an extensive study on FRP decks and FRP bridges is …
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The Virginia Tech Calibration System
… Standard, covers adequately the steady-state characterization of PMUs but does not specify transient condition requirements. The North American Synchrophasor Initiative (NASPI) has developed a guide outlining the several tests required for dynamic characterization of PMUs. The National …
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Dynamic reservoir characterization using 4D multicomponent seismic data and rock physics modeling at Delhi field, Louisiana
… by 4D multicomponent seismic technologies. Dynamic rock physics modeling integrates the rich dataset of core, well logs, petrographic thin sections and facies providing a link between reservoir and elastic properties. The dynamic modeling in this high porosity sandstone reservoir shows that …
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