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 76 for “"analysis of surface"”.
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Analysis of surface mount technology solder joints
The factors determining the quality of surface mount technology (SMT) solder joints are numerous, and complex. The exploration of these factors, and how they may affect the reliability and quality of the joints can only be achieved through continuous research. In this project, essential areas of …
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A Fracture Mechanics Analysis of Surface Cracks in Bending
… in DSpace on 2014-12-12T00:25:46Z (GMT). No. of bitstreams: 1 7206938.pdf: 2569563 bytes, checksum: 8040d0da07cc857abf8c56ceeacc6624 (MD5) Previous issue date: 1971
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POWER SPECTRAL ANALYSIS OF SURFACE MYOELECTRIC SIGNALS DURING DYNAMIC CONTRACTIONS
The stochastic nature of surface myoelectric signals (MES) requires the use of power spectral analysis for effective characterisation. Spectral changes during different types of muscular activity are monitored using spectral parameters like mean power frequency, ratios of powers in several …
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Scattering Matrix Analysis of Surface Acoustic Wave Reflectors and Transducers
… mixed units, scattering matrix consisting of one electrical and two acoustic ports. These scattering parameter analytical expressions are functions of material constants, electrode geometry, and frequency. The three port single electrode scattering matrices are acoustically cascaded to …
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Three-dimensional analysis of surface settlement in soft ground tunneling
… study was performed to evaluate the effects of different construction variables on surface settlements above tunnels in soft ground. The finite element program "PLAXIS 3D Tunnel" was used to carry out the numerical analysis for the earth pressure balance (EPB) shield tunneling method in a …
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Mass spectrometric analysis of surface adsorbed oxygen on platinum electrodes.
Massachusetts Institute of Technology. Dept. of Chemistry. Thesis. 1969. Ph.D.
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Comparative analysis of surface power system architectures for human Mars exploration
This thesis provides a comprehensive analysis of surface power generation and energy storage architectures for human Mars surface missions, including tracking and non-tracking photovoltaic power generation, nuclear fission power, dynamic radioisotope power generation, and battery and regenerative …
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Numerical analysis of surface mount electronics with viscoelastic epoxy underfills and potting
Surface mount technology is quite common in modern electronics industry. In some instances, printed circuit boards (PCBs) have been encapsulated in foam or epoxy to improve survivability. When packaging PCBs to survive operational environments, it is important to understand the stresses and strains …
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Analysis of surface coils using Green Functions for functional magnetic resonance imaging
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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An analysis of surface area estimates of binary volumes under three tilings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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A microtexture based analysis of surface roughening in ductile metals during tensile deformation
… the cause and mechanism for the occurrence of parallel surface ridges during the deformation of two specific ductile metal alloys, namely AISI 430 ferritic stainless steel and an aluminium alloy designated AA3002. The investigation considers, in particular, the development of parallel ridges …
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A microtexture based analysis of surface roughening in ductile metals during tensile deformation
… the cause and mechanism for the occurrence of parallel surface ridges during the deformation of two specific ductile metal alloys, namely AISI 430 ferritic stainless steel and an aluminium alloy designated AA3002. The investigation considers, in particular, the development of parallel ridges …
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Infrared Thermometry Analysis of Surface Effects in Subcooled and Saturated Boiling of Water
In this work, the dynamics of subcooled and saturated flow boiling are studied, focusing on the influence of surface characteristics, visualized through advanced diagnostics capturing micro-scale phenomena. Utilizing specially crafted thin-film infrared heaters, we measured bubble dynamics …
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Study and analysis of surface charge collection and emission spectrum of plasma ashing process
… presents an important observation on the total surface charge collection using quantox wafers through the measurement of surface voltage (Vs) on wafer surface with contactless Kelvin Probe for changes in parameters during plasma ashing. In this report, it is covered on the plasma characteristics …
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Analysis of surface pressure and velocity fluctuations in the flow over surface-mounted prisms
The full-scale value of the Reynolds number associated with wind loads on structures is of the order of 10^7. This is further complicated by the high levels of turbulence fluctuations associated with strong winds. On the other hand, numerical and wind tunnel simulations are usually carried out at …
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An analysis of surface water from an informal settlement, Langrug, Franschhoek: down a slippery slope
Contaminated surface water from limited sanitation and drainage systems in informal settlements degrades receiving rivers. However, little is known about the water quality and flow of rivers draining informally settled catchments. This study explores the dynamics of a human water system in an …
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Characterization of soft soil using multi-channel analysis of surface waves (MASW) and electrical resistivity method (ERM)
This thesis demonstrates the research on the soft soil characteristics using geophysical methods. The need on non-intrusive, time efficient, economic and larger volume of investigation had increased the demand of using geophysical methods for geotechnical investigation. The research concentrates on …
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A frequency domain analysis of surface heat transfer/free-stream turbulence interactions in a transonic turbine cascade
The relationship of time-resolved surface heat flux to the turbulent free-stream flow over a turbine blade is investigated. Measurements are made in a transonic linear cascade with a modem high pressure turbine blade profile. Time-resolved direct heat transfer measurements are made with Heat Flux …
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Data acquisition systems for three-dimensional representation and analysis of surface topography and surface temperatures in tribological processes
… for three-dimensional representation and analysis of surface topography and surface temperatures in tribological processes. 3-D information about the topography of surfaces was obtained from parallel traverses of the stylus of a Talysurf 4 profilometer. MOVIE.BYU and Tektronix graphics …
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Time Series Analysis of Surface Deformation Associated With Fluid Injection and Induced Seismicity in Timpson, Texas Using DInSAR Methods
… fluid is pumped into deep formations, the state of stress within the subsurface changes, potentially reactivating pre-existing faults and/or causing subsidence or uplift of the surface. Therefore, hydraulic fracturing and/or fluid disposal injection can significantly increase the seismic hazard …
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