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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 54 for “"Thermal characterization"”.
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Thermal Characterization of Complex Aerospace Structures
… of complex structures exposed to harsh thermal environments is a crucial issue in many of today's aerospace and space designs. To predict the thermal stresses a structure might be exposed to, the thermal properties of the independent materials used in the design of the structure need to …
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Thermal characterization and modeling of LDMOS FETs
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Thermal characterization of honeycomb core sandwich structures
… structures. When subjected to high-speed flight, thermal loading can induce significant stresses. The need for thermal properties to perform thermal stress analyses in these structures is the motivation behind this research. The thermal property estimation approach used here involves the …
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Thermal characterization and modeling of an energy storage system
… tool that was developed to predict and analyze thermal loads in an electric vehicle charging system. The tool was designed using computational fluid dynamics techniques and validated with experiments to provide a system-level view of the temperature profiles of all components and airflow …
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Comprehensive Structural and Thermal Characterization of Selected Grass Lignins
… in lignin. In addition, PCGL and SGL have high thermal transition temperatures and lower decomposition compared to BBSL and MSL. Nitrobenzene and cupric oxide oxidation results demonstrate vanillin and syringaldehyde as the major phenolic moieties. Pyrolysis-gas chromatography-mass spectrometry …
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Thermal Characterization of Die-Attach Degradation in the Power MOSFET
The thermal performance of the power MOSFET module is subject to change over its lifetime. This is caused by the growth of voids and other defects in the die-attach layer. The goal of this dissertation is to develop measurement techniques and finite element simulations that can measure the changes …
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Electrical and thermal characterization techniques for carbon nanotube transistors and networks
… thermometry platform for measuring the thermal properties of nanoscale films is presented, with possible application to single-walled CNT random networks and perfectly aligned arrays. The platform is freely suspended to confine heat flow to one dimension, leading to challenging stress …
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Thermal characterization of an ignition assistant device at engine relevant conditions
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
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Thermal Characterization of Graphitic Carbon Foams for Use in Thermal Storage Applications
… foams are currently being studied for use as thermal conductivity enhancers (TCEs) in thermal energy storage (TES) systems. TES systems store energy using the latent heat capacity of phase change materials (PCMs). Due to the low thermal conductivity of most PCMs, TCEs are necessary to evenly …
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Soft, wireless electronics for the thermal characterization of skin and soft tissue
… in clinical medicine. Devices for the continuous thermal characterization of living tissue represent one such opportunity and the work presented here illustrates a set of materials, mechanics and electronics designs required to realize fully functional sensors for temperature and flow mapping …
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Mechanical and Thermal Characterization of Continuous Fiber-Reinforced Pyrolysis-Derived Carbon-Matrix Composites
… into carbon-matrix to improve the mechanical and thermal properties of the composites. Composite material consisting of basalt fiber and phenolic resin was pyrolyzed to produce basalt-carbon composites through a novel method in which the pyrolysis promoted in-situ carbon nanotube growth to form …
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Development and thermal characterization of polydiacetylene (PDA) nanofiber composites for smart wound dressing applications
Conventional methods of identification of microbiological pathogens infection in wound have many challenges such as the need for specialized instruments and trained personnel, and the long detection time. There is a critical need for an innovative method that is simple, accurate, sensitive, …
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DC, RF, and Thermal Characterization of High Electric Field Induced Degradation Mechanisms in GaN-on-Si High Electron Mobility Transistors
… substrates have been considered for their thermal properties and cost-effectiveness, and Silicon (Si) has been of increasing interest due to a balance between both factors.</p> <p>In this thesis, the DC, RF, and thermal characteristics of GaN HEMTs grown on Si-substrates will be …
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Synthesis and Thermal Characterization of a Series of Copolyesters Synthesized from Terephthaloyl Chloride, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and Bisphenol A, AF, F, and HPF
… synthesized and characterized for structure and thermal properties The percent incorporation of the CBDO and bisphenol were varied in order to examine the effect on thermal properties The structure of these various copolymers was verified by fourier-transform infrared spectroscopy (FTIR), as well …
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FINITE ELEMENT AND IMAGING APPROACHES TO ANALYZE MULTISCALE ELECTROTHERMAL PHENOMENA
Electrothermal effects are crucial in the design and optimization of electronic devices. Thermoreflectance (TR) imaging enables transient thermal characterization at submicron to centimeter scales. Typically, finite element methods (FEM) are used to calculate the temperature profile in devices and …
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A high resolution programmable thermal test chip
… the need for more accurate and fine-grained thermal characterization methods. While numerical simulation remains a powerful tool for predicting on-chip temperature distributions, its accuracy ultimately depends on model assumptions and boundary conditions. To bridge this gap, A design and …
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Multidisciplinary research in Raman spectroscopy, phase imaging and their applications in heat transfer
… interests in the high spatial resolution thermal characterization techniques. Although great improvement has been made in temperature probe, heat flux measurement and thermophysical properties characterization especially for solid-state materials and structures, precision thermal …
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