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 30 for “"Spectra analysis"”.
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Infrared Spectra Analysis of Thermally Altered Iron Phyllosilicates and the Implications for Mars
… to collect the near- and mid-infrared spectra. The spectra allowed for these terrestrial analogs to be analyzed with regards to how their structure breaks down with increasing temperature. The samples' colors were also recorded and show varying degrees of oxidation following heating, …
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Techniques For Sensor-Integrated Robotic Systems: Raman Spectra Analysis, Image Guidance, And Kinematic Calibration
… employed to provide these capabilities. For the analysis of complex sensor signals, there is a need for improved algorithms and open platforms that enable techniques to be shared. For the path planning and tracking of integrated sensors and the visualization of collected information, image …
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Non-Invasive Flow Measurement Via Distributed Acoustic Sensing Utilizing Frequency Spectra Analysis of Wall Pressure Fluctuations
This research describes a method of using distributed acoustic sensing to noninvasively measure volumetric flow rate via multiple unique sensor styles. This work modifies previously used methods of flow detection via fiber optic acoustic sensors affixed onto the exterior body of a flow apparatus. …
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Design and characterization of a smart bit for in-situ force measurement, using capacitive load cells and acoustic spectra analysis to determine rock type and tool wear in rock excavation process
… the Support-Vector machine using fast Fourier spectra magnitude of short duration samples of signal, around 0.2 seconds, performed the best. Other machine learning methods explored for classification applications in this research include multi-layer perceptron neural networks and k-nearest …
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Design and characterization of a smart bit for in-situ force measurement, using capacitive load cells and acoustic spectra analysis to determine rock type and tool wear in rock excavation process
… the Support-Vector machine using fast Fourier spectra magnitude of short duration samples of signal, around 0.2 seconds, performed the best. Other machine learning methods explored for classification applications in this research include multi-layer perceptron neural networks and k-nearest …
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Signal enhancement and data mining for biological and chemical samples using mass spectrometry
… of healthcare, pharmaceutics, environmental analysis, food industry and forensics due to its ability to provide molecular information at trace levels. Recently, because of the complexity of chemical and biological samples, computer-assisted mass spectra analysis, including signal enhancement, …
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ESR and ENDOR studies of irradiated guanine and cytidine
Electronic Thesis or Dissertation
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Admicellar Polymerization to Compatibilize Calcium Carbonate With Oil-Based Drilling Mud
… adsorbed on the CC surface. BET N2 particle size analysis, Soxhlet extraction of the coated polymer, Fourier transform infrared-attenuated total reflectance (FTIR-ATR) spectra analysis, and thermogravimetric analysis (TGA) of the treated CC and polymer extract confirmed the production of a …
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Deterministic chaos in Alcator C-Mod edge turbulence
… reflectometer data from Alcator C-Mod (C-Mod), analysis of C-Mod edge turbulence in Ohmic plasmas and Ion Cyclotron Range of Frequencies (ICRF) heated L-Mode plasmas shows that density fluctuations just inside or at the Last Closed Flux Surface (LCFS) exhibit exponential power spectra. …
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Analysis of randomly occurring high injection forces in an insulin delivery device
… root problems and improve the process. Frequency spectra analysis of testing data using the Fast Fourier Transform (FFT), combined with device physics, identified the key interaction points within the sub-assemblies. This model of part interactions has been verified through testing of …
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Green synthesis of silver nanoparticles using Moringa oleifera extracts and their evaluation against antibiotic resistant strains of escherichia coli and staphylococcus aureus
… from pale yellow to dark brown-black. UV-vis spectra analysis showed maximum peak of 400-440 nm. FTIR analysis revealed the presence of hydroxyl and carbonyl functional groups, as well as C-N and C-O bonds that might be responsible for capping, stabilizing and reducing AgNPs. SEM analysis …
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Reductive Dehalogenation by Aqueous Biochars
… with model QNs and related thermodynamic/kinetic analysis have uncovered the critical roles of semiquinones (SQs) in reductive degradation reactions. HRMS and UV spectra analysis confirmed the rapid reactions between model quinones and cysteine, and the tagging efficiency was not affected by other …
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Laser foil printing and surface polishing processes
… on the polishing capability. The numerical analysis of laser polishing process shows that the convection flow in the melting pool can deepen the polished track. Three different scan paths were studied to polish the side surface of LFP parts. The finally resulted side surface roughness can be …
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An in-situ accelerator-based diagnostic for plasma-material interactions science in magnetic fusion devices
… measure the induced neutrons and gammas; energy spectra analysis provides quantitative reconstruction of surface concentrations. An overview of the diagnostic technique, known as accelerator-based in-situ materials surveillance (AIMS), and the first AIMS diagnostic on the Alcator C-Mod is given; …
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Size spectra and temporal synchrony patterns in temperate and tropical river networks
… over 4 sample periods. We conducted a size spectra analysis to quantify change occurring over time and across space. We were interested in quantifying how similar communities were between sample periods, across stream sizes, and between regions. Analyzing temporal synchrony is the method we …
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Human physiological and biomechanical responses to vibration exercise
… systems were investigated using 3D motion analysis, near infra-red spectroscopy (NIRS), laser Doppler blood flow analysis and electromyography (EMG). Analysis of a prototype vibrating stationary cycle identified significant increases in muscle activation. However, the validity of the …
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Platinum-NGR A Peptide Targeting Conjugate Of Cisplatin: Design, Synthesis, And Efficacy In Breast Cancer Cells
… Compound identity was confirmed using mass spectra analysis. Our synthesized drug, cyclic mPeg-CNGRC-Pt, was then employed in in vitro testing in 4T1 breast cancer cell lines that are CD13 positive. Cell viability, drug competition, and drug uptake were assessed in 4T1 cells for cyclic …
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Remote sensing of penguin populations: Development and application of a satellite-based method
… obtained the first in situ hyperspectral reflectance spectra of Adélie and chinstrap guano. These spectra are used to identify the features responsible for varying guano types and suggest new indices for differentiating these in satellite imagery. Satellite imagery coincident with …
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