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 17 of 17 for “"Nearinfrared"”.
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Asymptotic giant branch variables in NGC 6822
… dwarf irregular galaxy, was observed in the nearinfrared JHKS bands using the Japanese-SAAO Infrared Survey Facility (IRSF) telescope over a period of about four years. An extensive search for large amplitude asymptotic giant branch variables over the observed 7.5' x 21.1' area of NGC 6822 …
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Spatially resolved light propagation in tissue-like media
… non-invasively in vivo using spatially resolved nearinfrared (NIR) spectroscopy. Alzheimer's disease is one of the most common forms of senile dementia occurring in the elderly population, and at present has no cure. The first step in developing a monitoring instrument involves differentiating …
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Investigation into mid-infrared pulse shaping using an optical parametric oscillator
… with existing theory. The shaping of the nearinfrared pulses was performed using a zero dispersion pulse shaper and a computer controlled spatial light modulator. A suitable search algorithm was written and, with the use of appropriate computer hardware, allowed a closed-feedback loop to …
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Production of controlled networks and morphologies in toughened thermosetting resins using real-time, in-situ cure monitoring
… durable, inexpensive Fourier Transform NearInfrared (FTNIR) fiber optic sensor was developed and the cure of a model toughened cyanate as well as a commercial paste adhesive was followed with this sensor In the near-infrared. The design was suitable for many applications. A mold was …
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Tools, techniques, and early results in studies of 21 cm, Lyman-alpha, and H-alpha emission from the cosmic dawn
… between low frequency radio fluxes and nearinfrared fluxes, and we set the first limit on the angular cross spectrum between 21 cm and Lyman-a emission from the EOR. We show that in the near term, higher resolution radio and near-infrared surveys such as LOFAR and the Dark Energy Survey …
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Transients in the errorbox of GW190814
… a vast range of scientific disciplines. Optical/nearinfrared observations demonstrated that the emission was due to a kilonova powered by the radioactive decay of r-process material produced during the merger. For the first time short gamma-ray bursts were convincingly linked to BNS mergers, as …
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Low-Temperature Germanium Waveguides for Mid-Infrared Sensing Applications
… (Ge) is commonly used for photodetection in the nearinfrared (near-IR) wavelength range of 1.2-1.6 µm due to its strong absorption from a 0.8 eV direct band gap. At longer wavelengths in the mid-IR range, Ge exhibits transparency that makes it a desirable waveguide material for sensing …
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Zooming in on quasar accretion disks using chromatic microlensing
… uses single-epoch, multi-wavelength optical and nearinfrared imaging of gravitationally lensed quasars in conjunction with X-ray imaging, and takes advantage of the presence of microlensing perturbations to the magnifications of the lensed images. The dependence of these perturbations on the …
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Advancements in branched bottlebrush polymers for responsive, targeted imaging
… magnetic resonance imaging (MRI) and nearinfrared (NIR) fluorescent probes can be used in combination to visualize biodistribution and in vivo clearance rates. We reasoned that through the use of a nitroxide radical MRI contrast agent along with a NIR fluorophore it would be possible …
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Application of beam shaping in second-harmonic generation microscopy
… For experiments traversing ~ 1 octave in the nearinfrared and visible wavelengths, a significant reduction in chromatic aberration is observed for the RO. This work highlights the potential applicability of ROs for multimodal multiphoton microscopy. The second research work focuses on adopting …
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A near-infrared filter system and study of solar umbral dots at 1.6 µm
… interference filter centered at 1.56um with the nearinfrared InGaAs camera as the detector. The image data include two sequences of images of a complicated sunspot and a simple sunspot. The dynamic motion properties of umbral dots are studied from the movies of the two sunspots. From the data …
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Novel near-infrared absorbing dyes
… new donor-acceptor dyes, several of which were nearinfrared absorbing with low molecular masses and good organic solvent solubilities. The dyes were, however, strongly coloured due to their broad absorption bands which extended well into the visible region. The thermal and photochemical …
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The detection of economically motivated adulteration in the herb and spice industry
… instruments used in this study were nearinfrared (NIR) and Fourier transform infrared (FTIR). The sage method,developed using FTIR, resulted in binary and multiclass supervised models witha measurement of fit (R 2 ) of 0.978 and 0.952 and a measurement of prediction(Q 2 ) of 0.975 and …
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Remote sensing for detecting rapid post-fire recovery as Groundwater-Dependent Ecosystems in the Cape Floristic Region
… Sentinel-2A bands: Short-Wave Infrared (SWIR), NearInfrared (NIR), Red-edge, Red, Green, NDVI and Normalised Difference Wetness Index (NDWI) predictors and the potential wetland GDEs/non-wetland classes as the response. I tuned RF using five-fold repeated spatial cross-validation instead of the …
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Zerebrale Nahinfrarotspektroskopie bei Neugeborenen : Eine Untersuchung mit dem "CRITIKON 2020 Cerebral RedOx Monitor"
Frühgeborene und schwerkranke Neugeborene haben ein hohes Risiko für eine zerebrale Schädigung durch Hypoxie und Ischämie. Mit der Entwicklung der Nahinfrarotspektroskopie kam die Hoffnung auf, eine nicht-invasive, kontinuierliche Überwachungsmethode der zerebralen Perfusion und Oxygenierung zu …
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Arid land condition assessment and monitoring using mulitspectral and hyperspectral imagery.
… Stress Related Vegetation Indices using red, nearinfrared and mid-infrared bands consistently showed significant relationships with vegetation cover at both land system and landscape scales. Estimation of vegetation cover was more accurate within land systems than across broader regions. Total …
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Novel Carbopol-Wax Blends for Controlled Release Oral Dosage Forms
<p>Carbopol is crosslinked acrylic acid. Carbopol can be used in developing formulations for transdermal, oral, rectal use. It is forms strong gel in low concentration. Therefore, it can be used in low concentration in developing controlled release formulations. This increases the cost …