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 195 for “"Rectification"”.
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Visual pathology rectification
Human beings mostly rely on vision for most of the daily activities; any deformity in vision can limit a person's actions. These visual impairments can be genetic or age-related. Many individuals with a low and high-order visual problem find it hard to use a computer, even with the use of …
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High pressure rectification
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1936
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Automatic input rectification
We present a novel technique, automatic input rectification, and a prototype implementation, SOAP. SOAP learns a set of constraints characterizing typical inputs that an application is highly likely to process correctly. When given an atypical input that does not satisfy these constraints, SOAP …
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Rectification of Composition Tableaux
… We then describe a generalization of this rectification process. The generalization is from one cell in the first column to any number of cells in the first column, provided they are bottom-justified. We show this rectification of a composition tableau commutes with the rectification of a …
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Optical rectification in semiconductor waveguides
… electrical pulses by the use of optical rectification at telecommunication wavelengths, λ = 1550 nm. By using optical rectification, an electromagnetic pulse is generated in a completely passive semiconductor waveguide. This pulse is coupled in a microwave transmission line with …
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Analysis of boundary representation model rectification
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2000.
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Shell EIA rectification process: Gauteng Province sites
… were invited to participate in the completion of Rectification Reports for fuel storage installations in Gauteng. The Masters group consisted of four members who travelled to Gauteng for two weeks during March 2007 in order to complete site inspections of the fuel tanks. After returning to Cape …
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Theory of terahertz generation by optical rectification
… difference frequency generation or optical rectification of ultrafast optical pump pulses in nonlinear crystals has emerged as the most efficient approach for high-field THz generation. Earlier theoretical treatment of these systems had predicted conversion efficiencies as high as 10%, which …
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Improvements of Synchronous Rectification on LLC-DCX
… drain-source voltage sensed synchronous rectification (SR) on LLC DC-Transformers (DCXs). Firstly, a current resonance issue caused by the SR controller, and secondly a early turn-off issue from parasitics present in the drain-source sensing path. Two novel methods are proposed to solve …
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Energy relaxation and thermal rectification in carbon devices
… by controlling heat flow and shows that thermal rectification in patterned graphene structures is possible.
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Phase-controlled rectification for permanent-magnet downhole alternators
This thesis develops a method of phase-controlled rectification to be used with permanent-magnet downhole alternators. The design faces unique challenges imposed by the downhole environment. The thesis discusses the design, simulation, and construction of the rectifier. A high-side semi-bridge …
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Theory of optical rectification in a travelling wave structure
… of ultrashort electrical transients via optical rectification (OR) as well as cascading effects due to the interplay of OR and the linear electro-optic effect. A simple transmission line model is introduced to explain qualitatively the basic physical mechanisms of an externally induced …
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A radio-frequency high-voltage supply using grid rectification
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1949.
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Design of dual-output alternators with switched-mode rectification
Electrification of many automotive functions and the desire to introduce many new features are dramatically increasing the electrical power requirements of vehicles. The increasing power demands are becoming very challenging within the context of the present 14V electrical system and have sparked …
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Effect of vapor velocity in rectification / by Albert James Ullman.
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemical Engineering, 1936
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High field, high efficiency terahertz pulse generation by optical rectification
… of sources based on photonics. Optical rectification in lithium niobate is an attractive approach, because it supports high generation efficiencies, uses low cost, bulk LN crystals, and is powered by common Yb-doped lasers at wavelengths of around 1 Pm. In this work, a theoretical …
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Control of Nanoscale Thermal Transport for Thermoelectric Energy Conversion and Thermal Rectification
… thermoelectric energy conversion and 2) thermal rectification. Using molecular dynamics simulations, several methods for reducing of thermal conductivity in polyaniline and polyacetylene are investigated. The reduction in thermal conductivity leads to improvement in thermoelectric figure of …
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Compact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectification
In the early 1990's, with the boom of the Internet and the advancements in telecommunications, the demand for high-speed communications systems has reached every corner of the world in forms such as, phone exchanges, the internet servers, routers, and all other types of telecommunication systems. …
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APPLICATION OF TRACK ETCHED GLASS MEMBRANES FOR SUBMICRON FABRICATION, LITHOGRAPHY AND ERROR RECTIFICATION
… error in a fabrication process. Minimization or rectification of errors during the fabrication process would increase the productivity and reduce cost per unit of the fabricated devices. Therefore there is a compelling need for an error rectification system. Compared to the number of techniques …
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