Search results
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Title
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A Novel Fluorescence Based Method of Assessing Subsurface Damage in Optical Materials
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Author
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Williams, Wesley
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Date Created
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2009
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Subjects--Topical
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Mechanical engineering, Materials science, Optics
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Description
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Lapping and polishing are loose abrasive finishing processes that have been used to achieve critical surface parameters in optical materials for centuries. These processes remove material from the surface through a variety of mechanical and chemic...
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Title
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Additive manufacturing of PVDF-TrFE piezoelectric and pyroelectric sensors
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Author
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Marandi, Rafi
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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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Additive manufacturing, specifically Fused Deposition Modeling (FDM) method, has emerged as a promising technique for rapid prototyping. Using FDM, complex geometries can be created using precise layer by layer deposition of material. Among the ad...
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Title
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Analysis of failure mechanisms that impact safe Operation of AlGaN/GaN HEMTs
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Author
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Hodge, Michael
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Date Created
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2014
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Subjects--Topical
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Electrical engineering
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Description
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The reliability of AlGaN/GaN high electron mobility transistors (HEMTs) is traditionally determined via thermal lifetime acceleration stress tests. More recently it has been proposed that electric field has a prominent role in limiting lifetimes. ...
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Title
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Areal gear metrology with modified flanks
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Author
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Ni, Kang
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Date Created
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2017
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Subjects--Topical
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Mechanical engineering
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Description
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Gears are critical mechanical components in power transmission systems, used across a board spectrum of industries such as automobile, aerospace and renewable energy. Given the advancement of design and manufacture of gears in the past decades, th...
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Title
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Augmented Reality With Digital Metrology For Assembly
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Author
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Nawab, Rahma
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Date Created
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2022
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Subjects--Topical
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Optics
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Description
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This dissertation aims to create and demonstrate a fast and inexpensive quantitative dimensional inspection system for industrial assembly line applications that can detect position errors of assembled components on a scale of 1 mm and larger. The...
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Title
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Autonomous Sensing of a Gaussian Spatial Process with Multiple Heterogeneous Agents
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Author
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Brancato, Michael
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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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The performance of a mobile sensor network is measured by its ability to survey regions of interest efficiently and accurately with limited resources. Approaches for sampling trajectory optimization allow for adaptive algorithms that offer signifi...
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Title
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Bioactive ceramic coating on orthopedic implants for enhanced bone tissue integration
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Author
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Aniket, .
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Date Created
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2012
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Subjects--Topical
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Materials science, Nanoscience, Biomedical engineering
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Description
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Tissue integration between bone and orthopedic implant is essential for implant fixation and longevity. An immunological response leads to fibrous encapsulation of metallic implants leading to implant instability and failure. Bioactive ceramics ha...
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Title
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Characterization of the Dynamic Performance of Machine Spindles
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Author
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Ganguly, Vasishta
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering
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Description
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Machine spindle dynamics and (axis of rotation) error motions may vary as a function of spindle speed due to gyroscopic effects, changes in bearing preload, centrifugal forces, and thermals effects. It is necessary to characterize these changes in...
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Title
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FINITE ELEMENT ANALYSIS OF VORTEX MACHINING PROBES
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Author
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Vaidya, Mandar
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Date Created
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2014
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Subjects--Topical
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Mechanical engineering
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Description
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Vortex machining is a unique localized material removal process in which footprints of several nanometer in depth are obtained. It employs a resonating quartz tuning fork and a fiber attached on its upper tine. When submerged in a layer of slurry,...
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Title
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GENERATION AND CHARACTERIZATION OF FIREBRANDS FROM SELECTED STRUCTURAL FUELS
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Author
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Hedayati, Faraz
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Date Created
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2018
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Subjects--Topical
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Mechanical engineering
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Description
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Spotting by firebrands is the only mechanism that is capable of initiating fires miles from a fire line. The firebrand phenomenon can be understood in three major sequential phases: production, transportation, and ignition of the recipient fuel. A...
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Title
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Index-antiguided planar waveguide lasers with large mode area
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Author
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Liu, Yuanye
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Date Created
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2017
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Subjects--Topical
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Optics, Physics
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Description
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The on-going research and application interests with high power large-mode-area (LMA) waveguide lasers, especially in fiber geometry, at the beginning of this century drive the development of many novel waveguide designs. Index antiguiding, propos...
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Title
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On Accelerating Road Vehicle Aerodynamics
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Author
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Peters, Brett
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Date Created
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2018
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Subjects--Topical
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Mechanical engineering, Aerospace engineering, Fluid mechanics
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Description
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Road vehicle aerodynamics are primarily focused on developing and modeling performance at steady-state conditions, although this does not fully encompass the entire operating envelope. Considerable vehicle acceleration and deceleration occurs duri...
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Title
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Optically Projected Length Scale for Use in Photogrammetry
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Author
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Thewlis, Patrick
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Date Created
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2020
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Subjects--Topical
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Optics, Physics
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Description
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Photogrammetry is a measurement technique where 3D coordinate data and feature information can be extracted from 2D photographs or images. Length scale objects are calibrated artifacts placed into a photogrammetry scene which have precisely define...
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Title
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PLASMONIC NANOLITHOGRAPHY MACHINE (PLM)
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Author
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Saad, Mohamed
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Date Created
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2013
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Subjects--Topical
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Mechanical engineering
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Description
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The Plasmonic Nanolithography Machine (PLM) is a prototype that adopts near field maskless plasmonic nanolithography to achieve 45 nm line widths at 45 nm half pitch. A plasmonic lens floating on a hydrodynamic air bearing rides on a disc with abo...
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Title
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POLYDYNE DISPLACEMENT INTERFEROMETER USING FREQUENCY-MODULATED LIGHT
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Author
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Arablu, Masoud
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering, Electrical engineering, Optics
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Description
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A novel multi-frequency (polydyne) optical interferometry method is introduced and a prototype developed to evaluate its performance in a Michelson displacement interferometer configuration. The polydyne interferometer contains three main parts of...
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Title
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Performance Investigation of Rotary Tables in Large-scale Metrology
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Author
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Wang, Qichang
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Date Created
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2019
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Subjects--Topical
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Mechanical engineering
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Description
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Rotary tables significantly improve the flexibility and efficiency of multi-axis measuring devices and multi-axis machining centers by providing a quick positioning of workpieces. Large-scale rotary tables are designed and produced for increasing ...
