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.
Results
Showing 1 to 18 of 18 for “"experimental device"”.
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An experimental device for critical surface characterization of YBCO tape superconductors
… have been tested at 77 K and 4.2 K. A new experimental device has been designed and built to measure critical current of YBCO tapes and TSTC as a function of magnetic field and temperature. The probe allows controlling the temperature between 4.2 K and 80 K within +/-1 K in liquid and …
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Design, development, and characterization of an experimental device to test torsion-controlled fracture of thin brittle rods
… the design and development of a low-cost, manual device intended to test a hypothesis rooted in the behavior of breaking pasta that intrigued even Richard Feynman. While the mechanism for why spaghetti breaks into three or more pieces has been described, the experimental discussion presented here …
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Sustentação por película comprimida de gás entre placas em movimento normal relativo
A squeeze bearing experimental device was developed in order to investigate the squeeze film effects. A description is made of the developed components and the necessary instruments for control and measurements. Operation parameters were varied and the effects of suported mass motion and load …
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Adaptive control of a four-bar linkage
… velocity response is compared qualitatively to experimental data and shown to be similar to an experimental device.
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Development of a light detection system for bidirectional measurements over the solar spectrum and sun course simulations with scale models
… To encourage such use of natural light, a dual experimental device is being developed at MIT to help evaluate the effectiveness of various daylighting approaches, to be used as a goniophotometer for materials and coatings analysis and as a heliodon for studying scale models. The goniophotometer …
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Electropermanent magnetic connectors and actuators : devices and their application in programmable matter
… The electropermanent magnet is a solid-state device whose external magnetic flux can be stably switched on and off by a discrete electrical pulse. Electropermanent magnets can provide low-power connection and actuation for programmable matter and other small-scale robotic systems. The first …
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Scaling of Nanocryotron Superconducting Logic
… which produce correct operation in a small experimental device suggest that such a circuit may be scalable to millions of nanocryotrons. A device with a million nanocryotrons would be several orders of magnitude larger than any existing digital circuit based on superconducting nanowires. …
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A Self-contained Wireless Structural Health Monitoring Tool
… more and more precise, a lighter wireless device is sought which eliminates the weight and complexity associated with a network of wires.</p> <p>The objective of this thesis was to develop a self powered experimental device which measures strain as well as detecting and monitoring cracks, …
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Computational methods for transport properties
… patented antibiotics. This is due to a lack of experimental methods which are able to explain with a sufficient detail the permeation and, on the other side, to the difficulty in reaching the typical time scales (ms or even more) of these processes. The category of antibiotics studied in this …
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Sensors for thermal conductivity at high temperatures
… hot-wire technique, which consisted of the experimental measurement of the voltage response of a sensor and a subsequent inverse Unite element analysis, has been significantly upgraded.<br/><br/>The experimental part of the technique has been improved by the introduction of a new design of …
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Experimental Evaluation and Characterization of a Mobility Assist Device Physical Interface
… and independent is the use of mobility assist devices. These devices are designed to reduce the energy demand of the user with the use of electric motors providing torques at joints of the lower limb. Although promising, these devices have a problem: they become uncomfortable after prolonged …
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The hydrodynamics of the water hammer energy system
… was conducted to identify, design and develop a device capable of generating pico scale power (< 1 kW) in shallow water, low input tidal and river conditions. The result is the Water Hammer Energy System (WHES), a novel design that makes use of water hammer pressure surges to generate vertical …
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NANOSCALE EFFECTS IN JUNCTIONLESS FIELD EFFECT TRANSISTORS
… it was not possible to fabricate a useful JLFET device, as it requires a very shallow channel region. Very recently, the emergence of new and advanced technologies has made it possible to create viable JLFET devices using nanowires. This work aims to computationally investigate the interplay of …
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Mechanisms of reorientation in phytoplankton : fluid shear, surface interactions, and gravitaxis
… controlled shear flows in microfluidic devices, we show that the interaction of flow and motility can produce strong spatial heterogeneity in the distribution of phytoplankton. Four different species were tested over a broad range of shear rates, revealing that the effects of flow are …
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Removal of organic contaminants from lithographic materials
… from lithographic materials constructed an experimental device that demonstrated the removal of both polystyrene latex nanoparticles (representing hydrocarbon contamination) in the range of 30 nm to 500 nm, as well as the removal of 30 nm carbon film layers on silicon wafers. This research, …
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Návrh zařízení pro kultivaci okřehku
Tato bakalářská práce se zabývá vlastnostmi okřehku (Lemna minor) a návrhem částečně automatizovaného systému pro jeho vertikální kultivaci. Úvodní část představuje jednotlivé druhy okřehku a jeho vlastnosti. Dále jsou shrnuty hlavní faktory ovlivňující růst rostliny a dostupné metody kultivace. …
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Resistive-type Superconducting Fault Current Limiter (RSFCL) and Its Application in Power Systems
… fault current limiter (RSFCL) is a device that can help to mitigate the increasing level of fault currents. It can also contribute to the performance, stability and efficiency of electricity grids. In order to promote the RSFCL more effectively, it is essential to study the device …
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Junction Based Gallium Nitride Power Devices
… electronic circuits are power semiconductor devices including diodes and transistors, which determine the performance of power electronics circuits. Traditional power devices are based on the semiconductor silicon (Si), which have already reached the silicon's material limit. Gallium nitride …