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 74 for “"Visible and near-infrared"”.
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Comet-asteroid differentiation using visible and near-infrared spectroscopy
… formation of a "head" (coma) or "tail" as ice and other volatiles that comprise their chemical makeup vaporize when they near the sun. Comets can lose this ability to form a coma or tail, however, through a variety of dynamical processes, creating objects that could chemically be comets but …
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Visible and near-infrared emission spectroscopy of uranium particle clouds
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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New Derivatives Of Pyridine-2,6-Bis(Oxazoline) For The Sensitization Of Visible And Near Infrared Emitting Lanthanide Ions
… can be sensitized when coordinated by a ligand or antenna to give intense and characteristic color emission. Eu(III) and Tb(III) being the most thoroughly studied due to their intense emission in the visible region of the spectrum, the near-infrared emitting ions Yb(III), Nd(III) and Er(III) …
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Transient Rydberg Absorption Spectroscopy of Electron Beam Excited Rare Gases
Transient absorption spectra of molecular and atomic Rydberg transitions in the ultraviolet, visible, and near infrared (220 (LESSTHEQ) (lamda) (LESSTHEQ) 900 nm) spectral regions have been observed in electron beam exci- ted rare gases. The most prominent molecular bands for He(,2), Ne(,2),
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Real-time Image Processing on an FPGA for an Intraoperative Goggle Device
The emergence of near-infrared dyes for fluorescence imaging has had a tremendous impact in the medical field. In particular, indocyanin green (ICG) has been widely used for assessing tumor margins during intraoperative procedures. Typically, the dye is intravenously injected into the patient, and …
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Imaging and spectroscopy of tissue-like phantoms using photon density waves: Theory and experiments
… primary importance in several areas of medicine and biotechnology. In particular, the quantitative determination and spatial localization of the optical scattering and absorbing properties of biological tissue would allow for the non-invasive and non-ionizing imaging of tissue structure and the …
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Field Measurements of Water Continuum and Water Dimer Absorption by Active Long Path Differential Optical Absorption Spectroscopy (DOAS)
… strongly absorb the incoming solar shortwave and the outgoing thermal infrared radiation. Superimposed on the water monomer absorption, a water continuum absorption has long been recognized, but its true nature still remains controversial. On the one hand, this absorption is explained by a …
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Imaging of mice and men; adventures in multispectral imaging
Cancer of the brain and CNS account for only 2% of new cancer cases in the UK however it is responsible for 7% of cancer deaths of those aged under 70 years of age. Although surgery falls short of a cure it is the primary method of treatment. Two of the key problems in tumour surgery in the brain …
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A Hyperspectral Imager for a Cubesat to Identify Ocean Ship Parameters
… images which could be used to identify ships and determine the ship's length and breadth and heading. Depending on the size of the ship, the speed the ship is traveling can be determined as well; however the speed and size determination is limited by the spatial resolution of 100 meters. The …
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DeMeo taxonomy : categorization of asteroids in the near-infrared
… Component Analysis of spectral data over the visible and near-infrared wavelengths, specifically the 0.45 to 2.45 micron range. Principal Component Analysis was used by both Tholen (1984) and Bus (1999) to create taxonomies on visible data. There is no pre-existing taxonomic system for the …
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Spectral Properties of Sugar Beet Canopy Related to Sugar Content and Quality of Beet Roots
… have the potential to provide quantitative and timely information on agricultural crops over large areas. In agricultural planning and policy making knowledge of crop yield is very important. However, for sugar beets, sugar content and other beet properties also directly affect economic …
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Modeling Pluto's light curve in the near infrared : implications for observation post new horizons
… eccentricity of 0.249, obliquity of 123 degrees, and atmosphere, the transfer of volatiles may cause global surface change over the course of Pluto's orbit. Magellan visible and near infrared data were gathered one month before the New Horizons flyby in order to compare ground-based observing with …
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Vejos mišinio lapų atspindžių matomoje ir artimojoje infraraudonoje šviesoje tyrimas /
… reflection of sward mixture leaves in visible and near infrared wavelengths, when plants grow in different condition (water stress and watering with solutions of different concentration of KNO3 nutrients). The reflection of leaves was measured using photo-electronic registration system …
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Mobile hyperspectral imaging for structural damage detection
Numerous optical-imaging and machine-vision based inspection methods are found that aim to replace visual and human-based inspection with an automated or a highly efficient procedure. However, these machine-vision systems have not been entirely endorsed by civil engineers towards deploying these …
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Device for selecting lightwave ranges via computer control for studying building material properties via goniophotometer
To enable the fast and accurate cataloging of material samples, I designed a filtration device for selecting specific visible and near-infrared light wavelengths related to the red, green, and blue sensitivity peaks of a visible detection camera and the pixel response for a near-infrared camera. …
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Measuring photometric and spectral radiometric bi-directional transmission and reflection in a video-goniospectrometer
… a detailed knowledge of their optical spectral and directional properties. Bidirectional scattering functions (BSDFs), either in transmission (BTDFs) or reflection (BRDFs), are used to assess these properties and gather information vital to CFS design and analysis. To enable this analysis in a …
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Aerosol optical depth retrievals from high-resolution commercial satellite imagery over areas of high surface reflectance
The advancement and proliferation of high-resolution commercial imaging satellites presents a new opportunity for overland aerosol characterization. Current aerosol optical depth retrieval methods typically fail over areas with high surface reflectance, such as urban areas and deserts, since the …
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Chromium (III), Titanium (III), and Vanadium (IV) sensitization of rare earth complexes for luminescent solar concentrator applications
… solar concentrator (LSC). Neodymium (Nd) and ytterbium (Yb) are excellent infrared LSC materials: inexpensive, abundant, efficient, and spectrally well-matched to high-performance silicon solar cells. These rare earth ions are reasonably transparent to their own radiation and capable of …
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