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 98 for “"NIRS"”.
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Operationalisation of FT-NIRS based real-time monitoring for optimisation of anaerobic digestion
… and digestate. Previous work has identified FT-NIRS technology for applications in real-time multi-parameter monitoring of sludges. This thesis addresses the gap between 'proof of concept' and operationalisation, using case studies of sewage-derived digestates and feedstocks from Advanced …
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The use of near-infrared spectroscopy (NIRS) in the physiological assessment of sprint triathlon.
… 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 events such as sprint triathlon. …
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THE RELATIONSHIP BETWEEN P300 EVOKED POTENTIALS AND PREFRONTAL CORTEX OXYGEN USE: A COMBINED EEG AND NIRS STUDY
… difficult target detection task in both EEG and NIRS called the oddball. The EEG and behavioral results confirmed prior reports that difficult to detect targets result in attenuated P3b amplitude, as well as increased misses and reaction time, in comparison to easy to detect targets. NIRS results …
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A NIRS Study of Violinists and Pianists Employing Motor and Music Imageries to Assess Neural Differences in Music Perception
… While attached to a near infrared spectroscopy (NIRS) device, violinists and pianists of diverse experience levels viewed a series of performance videos (piano, violin) and performed associated imagery tasks. It was hypothesized that musicians will show diverse levels of brain activity in the …
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Issues in the processing and analysis of functional NIRS imaging and a contrast with fMRI findings in a study of sensorimotor deactivation and connectivity
… wave functional linear infrared spectroscopy (fNIRS) of the brain usung the DYNOT system. In the second part, the same sensorimotor experiment is carried out using functional magnetic resonance imaging (fMRI) and near infrared spectroscopy in eleven of the same subjects, to establish whether …
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Integrated Real-Time Control And Processing Systems For Multi-Channel Near-Infrared Spectroscopy Based Brain Computer Interfaces
… and anal- ysis of Near-infrared spectroscopy (NIRS) based brain-computer interfaces (BCI). These approaches were developed in conjunction with the implemen- tation of a new customized exible multi-channel NIRS based BCI hardware system (Soraghan, 2010). Using a comparable functional imaging …
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NEAR INFRARED SPECTROSCOPIC ASSESSMENT OF BONE WATER BINDING TO COLLAGEN AND MINERAL
… (NIR) also known as near infrared spectroscopy (NIRS) is a nondestructive modality that can spatially evaluate alterations of bone composition. NIRS is a unique nondestructive technique that produces a signature spectrum by penetrating high frequency (4000-12,000 cm-1) non-ionizing radiation into …
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Predictive models in near-infrared spectroscopic analysis for blood hemoglobin prediction
… Alternatively, near-infrared spectroscopy (NIRS) technology can be used to measure blood hemoglobin level. NIRS is based on molecular overtone and combination vibrations produce absorption bands typically very broad, leading to complex spectral data makes the NIRS useful for analysis. …
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Effects of muscle contractions on biceps brachii oxygenation investigated by near-infrared spectroscopy
… 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 brachii during lengthening …
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Exploring the combined use of electrical and hemodynamic brain activity to investigate brain function
… in health and disease, measured with QEEG and NIRS, in order to evaluate its clinical potential. First the limitations of NIRS were investigated, depicting its susceptibility to different types of motion artefacts and the inability of the CBSI-method to remove them from resting state data. …
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Near-Infrared Spectroscopy for Brain Computer Interfacing
… 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 of NIRS to develop an …
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AI-based analysis of cerebral oxygenation in preterm and term infants
… neurodevelopment. Near-infrared spectroscopy (NIRS) is a non-invasive technology capable of monitoring regional cerebral oxygen saturation (rcSO2) and detecting cerebral desaturation events in neonates. However, the clinical utility of NIRS signals remains limited due to challenges in …
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NEAR INFRARED SPECTROSCOPY IN ANIMAL NUTRITION AND FEED EVALUATION
… 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 macinati, e freschi e non macinati. La tecnologia NIRS può essere …
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Parasite communities and their identification in wild and domestic herbivores in Iceland
… near and mid infrared reflectance spectrometry (NIRS and MIRS) to identify parasites to the species level within a fecal sample. This new diagnostic technique relied on the development of cost-effective and accessible models that can accurately predict parasite species in fresh and frozen sheep …
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A multimodal breast cancer imaging system using coregistered dynamic diffuse optical tomography and digital breast tomosynthesis
… frequency-domain near-infrared spectroscopy (FD-NIRS) component. It achieves simultaneous dual wavelength operation at 685 nm and 830 nm by concurrent 67.5 MHz and 75 MHz frequency modulation of each laser source, respectively, followed by digitization using a high-speed analog to digital …
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Time-domain diffuse correlation spectroscopy: instrument prototype, preliminary measurements, and theoretical modeling
Near-infrared spectroscopy (NIRS) is an emerging diffuse optical imaging tool with both clinical and academic applications such as functional brain imaging, breast cancer detection, and cerebral health monitoring. Due to its non-invasiveness, high spatial and temporal resolution, and portability, …
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Reflectance photoplethysmography for non-invasive monitoring of tissue perfusion
… is mostly excluded. Near Infrared Spectroscopy (NIRS) is another optical technique that measures changes in the concentration of oxygenated (ΔHbO2), deoxygenated (ΔHHb), and total haemoglobin (ΔtHb) from the variations in light attenuations at different wavelengths. The main motivation of this …
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Biophysical modeling of hemodynamic-based neuroimaging techniques
… in this work. Near-Infrared Spectroscopy (NIRS) is a promising technique to measure cerebral hemodynamics in a clinical setting due to its potential for continuous monitoring. However, the presence of strong systemic interference in the signal significantly limits our ability to recover the …
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Application of Fecal Near Infrared Reflectance Spectroscopy and N-Alkane Labeled Supplementation Techniques to Predict Voluntary Intake in Beef Cattle
… of this study were to evaluate the use of fecal NIRS profiling and the n-alkane labeled supplementation method for the prediction of voluntary intake in beef cattle for the identification of animals divergent in feed efficiency. Additionally, the use of fecal NIRS profiling technology was …
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