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 34 for “"Optical analysis"”.
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Optical Analysis of Mitochondrial Function and Heterogeneity in Cultured Hippocampal Astrocytes
Diese Dissertation beschreibt die Untersuchung mitochondrialer Heterogenität in kultivierten Astrozyten des neonatalen Rattenhippocampus. Im Rahmen der Neurophysiologie und Pathologie erfuhren sowohl die Rolle von Astrozyten als auch jene zerebraler Mitochondrien während der vergangenen zwei …
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Fourier-based optical analysis of a membrane mirror spatial light modulator
… for the operation of a schlieren-like Fourier optical system, used to read out a phase-only spatial light modulator (SLM) for phase to intensity conversion. The computational model, based on discrete cosine transforms, is lightweight enough to be run on standard desktop computers, and flexible …
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Optical analysis of the ERBE scanning thermistor bolometer radiometer using the Monte Carlo method
… radiometer to spectrally characterize its optical and radiative performance. The optical analysis reveals that the ERBE scanning radiometer design successfully limits the amount of energy that reaches the active sensor to the designated instrument field of view. Distribution factors between …
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An Optical Analysis of the Blowoff Behavior for Bluff Body-Stabilized Flames in Vitiated Flow
… taken to serve as the primary data source for analysis. To examine the effects of Bénard-von Kármán vortex instabilities and local strain-induced extinctions on the lean blowoff process, proper orthogonal decomposition (POD) algorithms were applied to the frames of the high-speed videos. POD …
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Electromagnetic and Quasi-Optical Analysis of Cavity Coupled Bolometers for Far-Infrared and Terahertz Receivers
… code, GAMMA (Generalised Absorber Mode Matching Analysis), was developed and applied to existing and proposed future systems. One of the main goals of GAMMA was to analyse the performance of the proposed multimode pixel for the SAFARI instrument on the next generation SPICA terahertz space …
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Optical analysis of the Wallace Astrophysical Observatory 24-inch and Magellan I 6.5-meter telescopes
… Wallace Astrophysical Observatory (WAO) 24-inch optical system that would utilize the full potential of the telescope and a new CCD imaging instrument. An optical analysis of the 6.5-meter Magellan I telescope was first performed to determine the optimal mounting location for the Raymond and …
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Optical Analysis and Opto-Mechanical Design for Miniaturized Laser Illumination Module in 3D Areal Mapper
… structured-light illumination module with optical fiber input is designed to generate a coded 256 x 256 spots pattern for 3-D areal mapping applications. The projector uses the light from a He-Ne laser coupled to a polarization-maintaining (PM) fiber to illuminate a specially made hologram …
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Optical Analysis of a Linear-Array Thermal Radiation Detector for Geostationary Earth Radiation Budget Applications
… objective of this research is to develop an optical model for the detector and its cavity. The model based on the Monte-Carlo ray-trace (MCRT) method, permits parametric studies to optimize the design of the detector cavity and the specification of surface optical properties. The model is …
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Synthesis, characterization, and biotemplated assembly of indium nitride and indium gallium nitride nanoparticles
… and characterized. Chemical, structural, and optical analysis indicated up to 10% gallium incorporation before encountering the miscibility gap. Using CdSe nanoparticles as a model system, M13 bacteriophage-mediated, two-dimensional nanoparticle assembly was examined as a route for scaleable, …
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A parametric study of the radiative and optical characteristics of a scanning radiometer for Earth Radiation Budget applications using the Monte-Carlo method
… been developed to investigate the radiative and optical characteristics of these instruments. The Monte-Carlo ray-trace method has been applied to the ERBE and CERES scanning radiometer instruments to calculate radiation exchange. In a radiative analysis, the surfaces of both instruments are …
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Non-invasive diagnosis of non-alcoholic fatty liver disease.
… the following items: (i) A tool-based on optical analysis of liver magnetic resonance images as biomarkers for NASH and fibrosis detection by investigating patients with biopsy-proven NAFLD who underwent magnetic resonance protocols using 1.5T General Electric or Philips devices. Two …
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Assessing Topside Thermal Solutions for Hot Spot Management of Micro-Scale Electronics
… These proposals are assessed via finite element analysis simulations, which are partially verified through electrical thermometry and infrared thermography. The simulations investigate two scenarios: (1) where a single body of material is placed atop the device to spread heat away from the …
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New chalcogenide-based phase-change materials for potential data storage applications
… phases. They are semiconductorsand have optical band gaps in the range of 0.9-1.8 eV, which permits encoding by visibleor ultraviolet laser irradiation. The 1-xRbxSb5S8 family of solid solutions shows the abilityto tune the thermal and optical properties of these materials by changing the …
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The effects of porosity on the out-of-plane tensile strength of laminated composites
… number of specimens by metallography and optical analysis methods. This data was combined with the out-of-plane tensile data and used in the theoretical model, prepared by Brown et al, to predict the out-of-plane strength as a function of porosity. The predicted strength values compared …
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Design and Analysis of the Optical Beam Combiner and Corrugated Feed Horns for the QUBIC Instrument
… Argentina. This thesis describes the detailed optical analysis of the QUBIC instrument and, in particular, its quasi-optical beam combiner. Two variations of QUBIC are analysed: the full instrument (FI) and a technological demonstrator (TD). It was decided to develop the smaller optical …
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Hybrid Two Dimensional Quantum Devices
… them to air. To help preserve materials for analysis in air, a capsule was designed that isolates the material in an inert environment. Although the capsule is hermetically sealed, the encapsulated material remains accessible to optical analysis; analysis that is crucial to device …
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Analysis and fabrication of paraboloidal CFRP sandwich mirrors.
… balloon-borne, Cassegrain telescope required an optical quality better than 30 microns in figure RMS error. A parametric study on composite sandwich mirrors was conducted by using finite element analysis as well as optical analysis. The factors covered the cell sizes, core materials, core …
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Optical and Quasi-Optical Design and Analysis of Astronomical Instrumentation including a Prototype SAFARI Pixel
… of this thesis focuses primarily on the quasi-optical analysis of optical systems in the Terahertz region of the spectrum. This included the development of novel simulation techniques based on the principles of mode matching and gaussian beam mode analysis, which are uniquely suited to the …
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Sputter deposition and characterization of metal sandwiched indium tin oxide/silicon for solar cell application
… optoelectronic applications due to their high optical transmission and good electrical conductivity. Because of the rapid advancement of optoelectronic devices, new ITO design and structures are required to improve their performance for use in advanced applications. In this work, multilayer …
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