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 79 for “"gas analysis"”.
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Residual Gas Analysis of Ceramic Dip Pack Semiconductor Devices
No abstract prepared.
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An image based colorimetric technique for portable blood gas analysis
Blood gas analysis is an important part of a doctor’s diagnosis; it primarily consists of the partial pressure of oxygen, partial pressure of carbon dioxide and the pH. It provides the medical practitioners with insight into the patient’s respiratory health, the metabolic activity in the body and …
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Characterisation of minerals using evolved gas analysis and infrared spectroscopy.
… both qualitative and quantitative chemometric analysis. The first probe evaluated was cyclohexylamine (CHA). Ni[2+]- and Al[2+]-exchanged montmorillonite (SWy-2 -Wyoming, USA), were exposed to cyclohexylamine vapour (CHA). The samples were characterised by X-ray diffraction (XRD), …
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Condition assessment using dissolved gas analysis on transmission power transformers
In transmission networks, power transformers and reactors play a major role in the supply of power in the country. Power transformers and reactors are identified as most critical assets and have a significant impact on power network reliability. It is thus important to know the effective condition …
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Dissolved Gas Analysis of Insulating Transformer Oil Using Optical Fiber
… protection systems fail they often generate gas or acoustic signals signifying a problem. Research has already been performed discovering new ways integrate optical fiber sensors into high voltage transformers. This thesis is a continuation of that research by attempting to improve sensor …
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VALIDATION OF IMPROVED HARDWARE AND SOFTWARE FOR EXPIRED GAS ANALYSIS INDIRECT CALORIMETRY
… a new system of breath-by-breath expired gas analysis to both an artificial working model of lung ventilation and gas exchange as well as to the Douglas bag technique. In addition, comparisons will be made between expired fractions, ventilation, and computations of VO2, VCO2, and RER …
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Soil gas analysis as a predictor of VOC concentrations in groundwater and stream inflow
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1994.
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Degradation Product Analysis of Bismaleimide Composite
… for stability assessment. The effect of aging gas environment is also studied. The use of on-line gas cell fourier transform IR spectrometer (FTIR) and mass spectrometer (MS) allows for the identification of decomposition products by evolved gas analysis. This combination of thermogravimetric …
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The kinetics of ferrous iron oxidation by Leptospirillum-like bacteria in absence and in presence of pyrite and pyrite/arsenopyrite mixtures in continous and batch cultures
… is that the process is followed by the off-gas analysis and redox potential of the solution. With the off-gas analysis the oxygen and carbon dioxide concentration in the incoming air and outcoming gas was measured and the ferrous iron concentration in the solution was derived with the redox …
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Power transformer health assessment derived from low energy and dissolved parameters
… the model on field data in the form of dissolved gas analysis as recorded from 201 GSU transformers that have either failed or are presently in service.
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An evaluation of monitoring of respiratory physiological parameters in patients treated with non-invasive ventilation in the emergency department in Sligo University Hospital in Ireland
… adequate monitoring of clinical and blood gas parameters is crucial to ensure treatment targets are met. Objective: This study aims to evaluate monitoring of respiratory physiological parameters in patients treated with non-invasive ventilation (NIV) in the ED in Sligo University Hospital. …
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Terahertz wave-molecule interactions via CMOS chips : from comb gas sensor with absolute specificity to ultra-stable, miniaturized clock
… the millimeter wave and terahertz regimes, polar gaseous molecules generate unique rotational spectra. The frequency and absorption intensity of rotational spectral lines are directly linked to the micro-scale molecular structures. They serve as an indicator or "finger-print" of molecules. Thus, a …
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Wood and soil-atmosphere carbon dioxide fluxes from a tropical forest ecosystem
… Station in Costa Rica (LS) using infrared gas analysis methods. Annual Stem CO2 fluxes for TNF and LS averaged 1.7 mumol m-2 s-1 and 4.5 mumol m-2 s -1, respectively. At TNF wood surface area was calculated (4161 m 2 ha-1) and wood CO2 flux extrapolated to ground area resulted in an annual …
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A Study of Combustion Profiles of Co-Fired Coal/Biomass/Limestone Samples in a Fluidized Bed Combustor
… performance, and estimate the effect of flue gas emissions on the atmosphere. The operating conditions for the AFBC system are similar to those used at the TVA 160-MW AFBC Pilot Plant located near Paducah, Kentucky. AFBC systems are ideal for co-firing because of their ease in heat conversion …
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Studies of Monitoring and Diagnosis Systems for Substation Apparatus
… tool for power transformers based on dissolved gas analysis, ANNEPS v4.0, was developed. The new tool extended the existing expert system and artificial neural network diagnostic engine with automated data acquisition, display, archiving, and alarm notification functions. This thesis also …
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Functional Capacity Outcomes following Coronary Artery Bypass Graft Surgery
… maximal treadmill test using a ramp protocol and gas analysis. When all pre-surgical variables where included in a multiple linear regression, the analysis yielded a model that included the prior to surgery VSAQ, orthopedic limitations, and angiotensin converting enzymes (ACE) inhibitor drugs as …
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Determination of inhalation injury
… assessed on the basis of clinical data, blood gas analysis, and bronchoscopy. Cardiopulmonary responses in the immediate post-injury phase of smoke inhalation have not been well delineated. A study of the responses to inhalation injury was undertaken to determine whether selected …
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Laser Remote Sensing for Environmental Monitoring
… becomes a very suitable tool for environmental analysis. Light detection and ranging (LIDAR) measures the backscattered light from remote targets using a short-pulsed laser. Three varieties of LIDAR techniques, based on a vehicle-carried laboratory, have been developed in the work within the …
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Progress in an oxygen-carrier reaction kinetics experiment for rotary-bed chemical looping combustion
… deliver controlled conditions of temperature and gas flow around a central disc of oxygen-carrier material and determine the rates of oxidation and reduction using real-time gas analysis (RTGA). In order to deliver precise and accurate results, it was necessary to identify and either minimize or …
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