Search results
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Title
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Absolute Surface Reconstruction by Slope Metrology and Photogrammetry
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Author
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Dong, Yue
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Date Created
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2014
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Subjects--Topical
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Optics
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Description
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Developing the manufacture of aspheric and freeform optical elements requires an advanced metrology method which is capable of inspecting these elements with arbitrary freeform surfaces. In this dissertation, a new surface measurement scheme is in...
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Title
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DESIGN AND FABRICATION OF LOW LOSS AND LOW INDEX OPTICAL METAMATERIALS
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Author
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Cox, Princess
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Date Created
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2013
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Subjects--Topical
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Optics, Nanoscience
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Description
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The study of optics has changed over the past 3000 years. We have developed beyond the early lens technologies of quartz and other types of glass materials and new materials are being engineered to enhance the properties of naturally occurring mat...
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Title
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Design and Analysis of Active Isolation in Power Converter Systems
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Author
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Halsted, Clint
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Date Created
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2020
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Subjects--Topical
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Electrical engineering
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Description
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This dissertation presents a new class of power converter topologies that realize galvanicisolation by utilizing active transistor devices instead of conventional transformers. The power converters employ standard switch-mode topologies but isolat...
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Title
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Detection and Classification of Defects in Metal Parts Using ATOS Professional 2019
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Author
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Gorman, Ryan
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Date Created
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2022
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Subjects--Topical
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Mechanical engineering
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Description
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When inspecting a manufactured part to determine whether it falls within tolerance, it is often important to distinguish the difference between a defect and geometric variation. A part that exbibits excessive geometric variation will fail to meet ...
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Title
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Discrete Element Simulations of Powder Spreading in Additive Manufacturing
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Author
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Amrapurkar, Parth
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Date Created
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2020
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Subjects--Topical
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Mechanical engineering, Engineering, Physics
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Description
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Powder spreading plays a critical role in the quality of parts produced with selective laser sintering (SLS). Some of the important parameters that influence the quality of the powder bed are the powder particle size and distribution, blade speed,...
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Title
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Hexacoordinate Silicon Complexes as Cathodic Colorants
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Author
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Peloquin, Derek
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Date Created
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2016
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Subjects--Topical
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Nanoscience, Chemistry, Chemistry, Inorganic
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Description
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Electrochemical and spectroelectrochemical characterization of hexacoordinate polypyridine silicon complexes show that they are fitting candidates for electrochromic applications. Tris(bipyridine)silicon(IV), [Si(bpy)3]+4, is colorless in acetonit...
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Title
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In Situ Fringe Projection Profilometry for Laser Powder Bed Fusion Process
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Author
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Zhang, Bin
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Date Created
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2017
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Subjects--Topical
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Mechanical engineering, Optics, Engineering
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Description
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Additive manufacturing (AM) offers an industrial solution to produce parts with complex geometries and internal structures that conventional manufacturing techniques cannot produce. However, current metal additive process, particularly the laser p...
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Title
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LIMIT THEOREMS FOR ONE CLASS OF ERGODIC MARKOV CHAINS
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Author
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Turhan, Nezihe
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Date Created
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2016
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Subjects--Topical
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Statistics, Mathematics
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Description
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The goal of this dissertation is to develop some classical limit theorems for the additive functionals of the homogeneous Markov chains in the special class of the so-called, Loop Markov Chains. The additive functionals of the Markov chains have t...
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Title
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Machining and Chatter Avoidance: Predictive Analytics and Uncertainty Analysis
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Author
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Hashemitaheri, Maryam
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Date Created
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2023
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Subjects--Topical
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Mechanical engineering
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Description
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The main focus of this study is on chatter avoidance during machining. Self-excited regenerative vibration or "chatter" is a significant obstacle in machining which results in poor surface quality and damage to the tool, workpiece, and even machin...
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Title
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Specification and Modeling of Mid-Spatial Frequency Errors in Optical Systems
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Author
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DeMars, Luke
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Date Created
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2023
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Subjects--Topical
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Optics
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Description
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Recent advancements in manufacturing and post-processing of optics with sub-aperture methods have enabled greater degrees of freedom to realize complex optical surfaces. Introduction of residual mid-spatial frequency (MSF) surface errors is a cons...
