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 53 for “"Spectral imaging"”.
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Identification of Molecules by Spectral Imaging
<p>Spectral imaging is a powerful technique which uses the wavelength to identify/quantify the exact location and amount of the molecules. It facilitates the identification of materials and studying their properties through analyzing the way they interact with light. The study of light interaction …
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Mass Spectral Imaging for Analysis of Pharmaceutical Ingredients
<p>Mass spectral imaging (MS-imaging) is a modern technique used for the analysis and characterization and distribution of pharmaceutical ingredients , drugs, peptidies, lipids, and other bioactive species in tissue section/ Tissue prints. Although now widely accepted, there remains a host of …
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Applications of UV-visible spectral imaging in forensic science
This study investigated the use of UV-visible spectral imaging for the location and enhancement of substances of forensic interest using targeted approaches based on the spectrum of the substance. Spectral enhancement procedures were developed for blood with and without chemical enhancement, and …
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Transport Properties of Divertor Edge Plasmas Measured with Multi-Spectral Imaging
… spatial coverage. In this thesis, multi-spectral imaging of helium line ratios (HeMSI) was used to create 2D poloidal maps of Tₑ and nₑ in the TCV divertor. These are the first plasma boundary measurements to provide continuous 2D coverage of Tₑ and nₑ for arbitrary magnetic geometries. …
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Bio-Inspired Multi-Spectral Imaging Sensors and Algorithms for Image Guided Surgery
<p>Image guided surgery (IGS) utilizes emerging imaging technologies to provide additional structural and functional information to the physician in clinical settings. This additional visual information can help physicians delineate cancerous tissue during resection as well as avoid damage to …
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Computational imaging and inverse techniques for high-resolution and instantaneous spectral imaging
In this thesis, we develop a class of novel spectral imaging techniques that enable capabilities beyond the reach of conventional methods. Each development is based on computational imaging, which involves distributing the spectral imaging task between a physical and a computational system and then …
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Probing interfacial electronic structure in quantum materials using stem cathodoluminescence spectral imaging
… in a time-resolved measurement system for hyperspectral mapping in position and optical energy, as well as time resolution. Combined with high-resolution imaging, four-dimensional electron microscopy for imaging lattice distortion and electron energy-loss spectroscopy (EELS), the STEM/CL setup …
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Mikrozirkulatorisches Monitoring mittels Orthogonal Polarisation Spectral Imaging (OPS) während herzchirurgischer Eingriffe unter extrakorporaler Zirkulation
… wurde von unserer Arbeitsgruppe OPS imaging, eine neue Technik, welche mit polarisiertem Licht und Epi- Illumination ohne Einsatz von Fluoreszenzfarbstoffen arbeitet, eingesetzt. Im Mittelpunkt unseres Interesses stand die Frage nach Anwendbarkeit und Praktikabilität, sowie Sicherheit …
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Evaluation of Ground-Based Spectral Imaging Capabilities for Detecting and Quantifying Landfill Methane Emissions
… evaluates the capabilities of ground-based spectral imaging for detecting and quantifying the methane emissions of the Pinto landfill near Madrid, Spain. The Pinto landfill is one of the landfills with the largest methane emissions in Europe. Over the course of two weeks in the summer of …
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Real-Time Nitrogen Detection System of Corn Crop Using a Multi -Spectral Imaging Sensor
Real-time N-deficiency was estimated by using NDVI and mapped relative to unstressed healthy plants. The MSIS system provided a measure of crop response that correlated with plant SPAD measurements (-0.93 for G channel and -0.88 for R channel). The system had smaller measurement variation than the …
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The Use of Spectral Imaging to Reveal Inorganics and Organics Identity in The Biological Samples
… and quantify the number of molecules in the spectral imaging system. It aids in identifying materials and studying their quantities by examining how they interact with light. A traditional spectrometer provides spectrum information of chemical compounds, while standard imaging provides the …
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Development of Snapshot Imaging Spectrometer Using High-Density 3D-Printed Waveguide Arrays
Snapshot imaging spectrometers simultaneously capture spatial and spectral information, enabling applications in fields such as biomedical imaging and environmental monitoring. However, traditional designs often struggle to balance spatial-spectral sampling density with compactness, and their …
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Ground Sensor Based Variable Rate Nitrogen Management
Integrating the multi-spectral imaging sensor with a variable-rate nitrogen application system, can provide the fundamental means for performing site-specific variable-rate nitrogen side-dressing applications. Using the estimated SPAD values to support sensor-based variable rate nitrogen …
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Spectral studies of small-scale auroral structure and plasma instability in the high-latitude ionosphere
… by low-energy electron streams. Using multi-spectral imaging in combination with radar observations, a direct link is shown between ion-acoustic wave enhancements and precipitating electrons at 100 eV energies. Wave enhancements at the radar wavevector which are three orders of magnitude …
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Design and implementation of a custom imaging mass spectrometer.
… ongoing project for developing a novel class of imaging mass spectrometer towards the goal of subcellular imaging. Construction of the proposed instrument required a large amount of engineering to ensure the instrument was capable of achieving subcellular mass spectral imaging. In many cases, …
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Advanced Applications of Raman Spectroscopy for Environmental Analyses
… analysis (PCA) to statistically demonstrate spectral differentiation. A set of rules was outlined based on Raman peak ratios to allow an inexperienced user to determine the toxin variant identity from its Raman spectrum. DCDR was also employed for microcystin-LR (MC-LR) detection in …
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