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 178 for “"Near Infrared Spectroscopy"”.
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Near-Infrared Spectroscopy for Brain Computer Interfacing
… novel approach to BCI design, using noninvasive near-infrared spectroscopic (NIRS) techniques to develop a userfriendly optical BCI. NIRS is a practical non-invasive optical technique that can detect characteristic haemodynamic responses relating to neural activity. This thesis describes the use …
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Machine Learning Methods for functional Near Infrared Spectroscopy
… of human machine interaction. Functional Near Infra-Red Spectroscopy (fNIRS) device is a relatively new device that enables inference of brain activity through non-invasively pulsing infra-red light into the brain. The fNIRS device is particularly useful as it has a better spatial …
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A Neurofeedback-based Near-infrared Spectroscopy Brain-computer Interface
Near-infrared spectroscopy (NIRS) brain-computer interfaces (BCIs) enable individuals to interact with their environment using only cognitive activities. This thesis investigates the development of a more user-friendly, intuitive, and easy to use NIRS-BCI through six research objectives: exploring …
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NEAR INFRARED SPECTROSCOPY IN ANIMAL NUTRITION AND FEED EVALUATION
La presente tesi di dottorato è incentrata sull’importanza dell’utilizzo della spettroscopia del vicino infrarosso (NIRS) come un mezzo rapido e a basso costo per la previsione e il monitoraggio della composizione dei nutrienti e della qualità di diversi tipi di alimenti per animali, essiccati e …
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Frequency-Domain Near-Infrared Spectroscopy in the Human Brain
Monitoring brain tissue oxygen supply, demand, delivery and consumption can be achieved by quantifying the absolute values of oxy- and deoxy-hemoglobin and how these quantities change over time during rest, functional activation, pathology, and disease. My dissertation describes the development, …
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Characterization of spray dried powders by near infrared spectroscopy
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Comet-asteroid differentiation using visible and near-infrared spectroscopy
… 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 that do not fit the traditional definition. Thus, a new challenge has arisen …
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Miniature gas sensing device based on near-infrared spectroscopy
… utilized to make miniature gas sensor based on near-infrared spectroscopy for acetylene gas detection. In this work, the basic principles of infrared spectroscopy are reviewed. Also, the principle of operation, fabrication, testing, and analysis of the proposed sensor are discussed in details.
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Comparing analytic approaches to infant functional near-infrared spectroscopy data
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-05-01
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Decision Making in Dry-Grind Ethanol Industry Using Near-Infrared Spectroscopy
Calibration on the FT-NIR spectrometer for total soluble sugars predicted fermentation samples with a RMSEP of 0.87% w/v and RPD of 8.7. Total soluble sugar ranged from 0.4 to 22.2% w/v. Thus, in order to observe the effect of treatment on total soluble sugars, the difference between total soluble …
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Predictive model and near infrared spectroscopy in predicting the diesel fuel properties
… role in the performance of vehicle engines. Near-infrared (NIR) technology has been investigated as an alternative to monitor the diesel fuel properties. NIR spectroscopy shows an enormous potential for quantitative analysis of complex samples by coupling with artificial neural networks …
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Functional near-infrared spectroscopy for Hb and HbO₂ detection using remote sensing
… in this thesis is to develop a wireless, near-infrared (NIR) imaging system to provide flexibility and functionality to clinicians and researchers who require monitoring of blood profusion to tissue, muscles, or the brain. The prototype device uses a single stimulus/detection unit composed …
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Assessing Pre-Frontal Cortex Oxygenation After Sport Concussion With Near Infrared Spectroscopy
… people. To address these issues, non-invasive near infrared spectroscopy (NIRS) was used to assess pre-frontal cortex oxygenation, by measuring relative changes in oxy- (HbO2 ) and deoxy-hemoglobin (HHb), and the associated standard deviations. Resting hemoglobin, and hemoglobin changes in …
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Modeling longleaf pine (Pinus palustris Mill) wood properties using near infrared spectroscopy
… development for important wood properties using near infrared spectroscopy (NIR); it considered the effect of outside sources of error, and the ability of NIR to measure fiber morphology. Strength, stiffness, and density were successfully modeled from wood samples taken throughout 10 longleaf …
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The use of near infrared spectroscopy in detecting hemorrhagic shock in swine
… Medical Inc.'s Care Guide Oximeter used Near Infrared Spectroscopy to noninvasively measure regional muscle oxygen saturation (SmO2), the amount of oxygen still attached to hemoglobin in the blood after passing through the tissue. We hypothesize that the CareGuide Oximeter will show a …
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Compositional analysis and classification of Miscanthus using Fourier transform near infrared spectroscopy
… throughput assays based on Fourier transform near infrared (FT-NIR) spectroscopy, partial least squares regression (PLSR), and linear discriminant analyses (LDA) to provide quantitative and qualitative measures of Miscanthus composition were developed. Results showed large variations (mean ± …
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Dynamic state-space estimation of the hemodynamic response with Near-Infrared Spectroscopy
Near-Infrared Spectroscopy (NIRS) allows the recovery of the hemodynamic response associated with evoked brain activity. The signal is contaminated with systemic physiological interference which occurs in the superficial layers of the head as well as in the brain tissue. The back-reflection …
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Effects of muscle contractions on biceps brachii oxygenation investigated by near-infrared spectroscopy
… muscle oxygen (O2) consumption during exercise. Near-infrared spectroscopy (NIRS) allows for the noninvasive investigation of muscle oxidative metabolism during exercise at a high time resolution. However, limited studies have used NIRS to compare oxidative metabolic responses of the biceps …
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The use of near-infrared spectroscopy (NIRS) in the physiological assessment of sprint triathlon.
… A single study from the review looked to utilise Near-Infrared Spectroscopy (NIRS) within triathletes. NIRS is a light-based technology that reports on the relationship between oxygen delivery and utilisation at the site of gas exchange in the muscle, a key indicator of performance in aerobic …
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Brain activation following constraint-induced movement therapy using functional near infrared spectroscopy in stroke patients
… Keller, & Chakeres, 2001). Functional Near-Infrared Spectroscopy (fNIRS) is an novel method of mapping the brain by using light to measure changes in oxygenated and de-oxygenated hemoglobin concentration in cortical tissue (Nishimura, Rapoport, Wubbels, Downs, & Downs, 2010). Research …
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