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 188 for “"Surface topography"”.
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The measurement and characterization of surface topography
The concept of surface topography is introduced and its relevance to the production and functional behaviour of engineering components is highlighted. Some aspects of the measurement and characterization of surface topography are reviewed. The strengths and weaknesses of particular techniques are …
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Effects of Surface Topography on Bacterial Biofilm Formation
… structures with bacterial cells attached to a surface and embedded in an extracellular matrix. With high-level resistance to antimicrobial agents, biofilms are the cause of chronic infections associated with implanted medical devices such as breast implants, orthopedic devices, pace markers, …
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Variable grid finite-difference modeling including surface topography
… modeling method for highly complex surface topography and subsurface structures. Realistic modeling of seismic wave propagation in the near surface region is complicated by many factors, such as strong heterogeneity, topographic relief and large attenuation. In order to account for …
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The oceanographic and geoidal components of sea surface topography
… techniques of optimum estimation- to infer the surface expression of the time averaged circulation (ζ) and to estimate the marine geoid (γ), both in the wavelength band 100 km-2000 km. Optimum inverse methods in geophysics are reviewed. They are then used to analyze the estimation of the geoid …
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The oceanographic and geoidal components of sea surface topography
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
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The Effects of Surface Topography on Droplet Evaporation and Condensation
… phase-change heat transfer enhancement, surface chemistry and energy system optimization. Especially, in the past two decades, the rapid development of the nature-inspired non-wetting surfaces has promoted the applications of droplet-based phase change phenomena in various scenarios. …
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A three dimensional vision system for industrial surface topography measurement
… a research programme into a triangulation based Surface Topography Measurement (STM) system. The particular system investigated produces a series of three dimensional coordinates of points on a target surface which has been placed in front of the STM system. It is designed for use at long ranges …
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Effect of surface topography upon the quality of autobody panels
… in term of substrate mechanical properties and surface topography and coating type) in order to achieve better quality and minimise manufacturing costs. The most useful approach to surface topography characterisation in engineering is to describe a surface by a set of parameters, which can be …
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Microplasma chemical reaction enhancement by laser modification of dielectric surface topography
… device fabrication is introduced. The ablated surface provides a topography that is distinct from the surface created by conventional techniques. Chemical, optical, and electrical experiments have been conducted to observe the difference in performance between devices fabricated with the …
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Using surface topography to re-analyze gradients in mussel byssal threads
Thin film instabilities have been heavily utilized in recent years in the fields of thin film production, biology and nano-fabrication. The creation of specific wrinkling and buckling patterns has been used as both a characterization and control technique. This project aims to apply the analysis of …
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Influencing contact-line behavior in dynamic wetting through thermocapillarity and surface topography
… fluid displacing a receding fluid on a solid surface. This phenomenon can be seen in day-to-day occurrences such as water droplets sliding on a glass window on a rainy day, where the droplet displaces the air surrounding the glass surface as it slides, and in industrial processes such as …
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Dynamic surface topography and its application to the evaluation of adolescent idiopathic scoliosis
Dynamic surface topography is a method to quantify the surface and locations of features acquired from moving and distorting shapes against time. This thesis describes the application of the technique to the potential evaluation of adolescent idiopathic scoliosis patients. Scoliosis or curvature of …
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Control of cell behavior by engineering substrata with defined surface topography and chemistry
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1994.
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Quantitative characterisation of surface finishes on stainless steel sheet using 3D surface topography analysis
… was to quantitatively characterise the developed surface topography of finishes on stainless steel sheet using three-dimensional surface analysis techniques. At present surface topography is measured using (mainly) stylus profilometry and analysed with 2D parameters, such as Ra, Rq and Rz. These …
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Qualifying the Variability of Surface Topography Indices for Detection of Clinical Progression of Scoliosis
Surface topography (ST) measurements of scoliotic deformities offer the potential to reduce radiation and to provide a more complete description of the deformity when compared to standard X-rays. These ST measurements must be evaluated within a clinical context to determine their feasibility for …
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The influence of abrasive surface topography on the basic mechanics of the metal grinding process
… investigation examines the influence of abrasive surface topography on the actual mechanics of the metal removal process. The characterisation of abrasive surfaces using statistical properties of the cutting profile is discussed. A study is undertaken which examines the influence of abrasive grit …
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Studying the glial cell response to biomaterials and surface topography for improving the neural electrode interface
… et al., 2003). Literature has shown that surface topography modifications can alter cell alignment, adhesion, proliferation, migration, and gene expression (Agnew et al., 1983; Cogan et al., 2005; Cogan et al., 2006; Merrill et al., 2005). Thus, the goals of the presented work are to study …
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The Exploration of Sagittal Spine Curvature: Validating a surface topography method & relating curvature to physical function
… sagittal spine curvature by validating a new surface measurement tool and implementing it in a clinical setting in order to understand and relate it to physical function outcomes. The findings from the first stage of this thesis came from an exploratory analysis of a large physiotherapy …
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