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 27 for “"Thermal effect"”.
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GATE DIELECTRIC BREAKDOWN PHYSICAL ANALYSIS AND STUDIES -2D MODELING OF BREAKDOWN THERMAL EFFECT
… model has been built based on the electro-thermal migration phenomenon to predict the size of DBIE under the influence of current density and temperature. TEM micrograph observations during the formation of DBIE have been verified by constructing a 2-D transient thermal model using Finite …
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Interfacial Dynamics and Applications in Optofluidics
… gallery modes (WGMs) can induce nonlinear effects in liquid droplets through mechanisms such as radiation pressure, light scattering, thermocapillarity, Kerr nonlinearity, and thermal effect. However, such nonlinear effects have yet to be thoroughly investigated and compared in the …
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Pulsed electric field treatment of Arthrospira platensis and Saccharomyces cerevisiae
… the death of microbial cells without significant thermal effect, which can be used for inactivation of microorganisms and facilitation lysis of microbial cells for lipid extraction. The present study aimed to investigate the efficiency of PEF treatment of Arthrospira platensis and Saccharomyces …
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Studies of the electrical properties and electroforming of thin insulating films
… been studied. These normally show electroforming effects and subsequently electron emission, electroluminescence, negative resistance and thermal-voltage memory effects. Previous work in the field is critically reviewed. It was shown that the time dependence of the device current and emission …
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The effects of extended illumination on CO rebinding to myoglobin
… is found to be a photon-induced rather than a thermal effect. Rebinding barriers of molecules that are photolyzed do not increase unless light is incident on the sample. The effects of extended illumination in each of the three A substates of sperm whale myoglobin are studied in considerable …
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Pillar-supported plasmonic nanoantennas for optical nanotweezers and optical audio applications
… into a three-dimensional geometry, the heating effect originating from the strong intrinsic absorption property of the metallic structure leads to a tremendous increment in temperature. This thermal effect can be utilized to locally modify the morphological shape of pBNAs, resulting in …
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Ultrasound induced cavitation and sonochemical effects
… activities of a sonochemical event through both thermal effect by changing the peak collapse temperatures in the bubble and chemical effect by directly participating in reactions. In addition, a laboratory scale sonochemical experiment is conducted to demonstrate the sonochemical effects as a …
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Nonlinear vibration and chaotic motion of uniform and non-uniform carbon nanotube resonators.
… with the Euler-Bernoulli beam model and the thermal effect is also considered for the vibration of CNTs. The effects of fluid conveying flow, geometrical nonlinearities and Winkler and Pasternak foundations are studied. Nonlinear equations of CNTs vibration postulating the longitudinal …
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Zeolites for Cleaner Processes: Alkylation of isobutane and n-butene
… mass transfer resistance, and with a negligible thermal effect. The results of this study suggest that higher alkylate yield and longer zeolite activity are achieved by increasing the intrinsic hydride transfer rate and the ratio of isobutane to n-butene: P/ O) concentration in the vicinity of …
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Influences of the internal residual on combustion instabilities in the misfire and partial burn regimes of a dilute spark-ignition engine
… limits. Understanding the influence different effects of the residual have on the dynamics is necessary in applying effective control methods at different dilute limits. The residual varies in both quantity and composition from cycle-to-cycle and is likely different between misfires and partial …
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Specific and efficient in vivo delivery of DNA and siRNA by polyethylenimine and its derivatives
… gene delivery. Herein we evaluated the effect of chemical modification on the specificity of PEI-mediated nucleic acid delivery. We found that low molecular weight PEI (2 kDa) does not mediate efficient gene expression while high molecular weight (> 87 kDa) leads to toxicity. However, …
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Robot-assisted acoustic vortex tweezers
… focuses on applying acoustic vortex beams as end effectors in combination with various manipulation platforms to develop novel methodologies. These include: (a) Robot-assisted chirality-tunable acoustic vortex tweezers for contactless, multifunctional, 4-DOF object manipulation; (b) Airborne …
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Theoretical investigation of metal-cavity nanolasers and nanoLEDs and comparison with experiments
… on metal cavity lasers. To understand the metal effect on metal-insulator-semiconductor-insulator-metal (MISIM) slab and circular waveguides, we derive their guiding conditions. The analysis gives us the intuition on metal cavity laser design. For the non-circular cross section of a nanodisk such …
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Dynamic modelling and simulation of the all-vanadium redox flow battery
… The work begins with modelling of the effects of vanadium ion diffusion across the membrane and gassing side reactions on the basis of mass balance and Fick's law, followed by employing energy balance to investigate the variation in electrolyte temperature as a function of time under …
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Targeted Drug Delivery with Cyclodextrin-based Nanocarriers and Focused Ultrasound Triggering
… drug dosage needed for the desired therapeutic effect.<br/>Objective: The work reported here aimed to develop novel nano-carriers for existing anticancer drugs, by establishment of human cancer cell models to evaluate the carriers’ encapsulation efficiency in vitro and in vivo, by using animal …
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An Experimental Study of Soot Formation in Dual Mode Laminar Wolfhard-Parker Flames
… Dual mode operation introduced competing thermal and chemical effects on soot chemistry. Experimental conditions were chosen to match peak nonpremixed flame temperatures among the cases by varying oxidizer inert (N2) concentration to minimize the dual mode thermal effect. In addition the …
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Shock Wave Dispersion in Weakly Ionized Gas
… was sufficiently accurate to indicate that the thermal effect is dominant. The electron density was obtained from measured line shapes of hydrogen Balmer lines by using the gas temperature and the well-tested approximate formula for deconvolution of Stark and Doppler broadening. The local …
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Supersonic Laser Deposition and LaserForge: Process Mechanism Coating Characteristics
… that can be used as an alternative to existing thermal spray processes. It has the benefit of low temperature, allowing the deposition of nanostructured and temperature sensitive coatings, which is not currently possible with existing thermal spray. This main aim of this work was to undertake an …
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Seismic imaging of the mantle transition zone
… zone. We found an 800- to 2000-kilometer-wide thermal anomaly (with a maximum temperature increase of -300 to 400 kelvin) deep in the transition zone west of Hawaii, by explaining the 410 and 660 km discontinuity topographies with olivine and garnet transitions in a pyrolitic mantle. According …
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Annular Beam Shaping And Optical Trepanning
… model provides a means of understanding the thermal effect of laser irradiation with different annular beam shapes. To take account of conduction in the solid, vaporization and convection due to the melt flow caused by an assist gas, an analytical two-dimensional model is developed for …
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