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.
Results
Showing 1 to 20 of 31 for “"Oxygen sensor"”.
-
Development of a reusuable atomic oxygen sensor using oxide thick films
… aim of this project was to develop a thick film sensor made of zinc oxide that would accurately respond to various fluxes of atomic oxygen (AO), allowing it to be regenerated after saturation. The sensors were manufactured using a thick film technique of screen printing over a substrate (alumina) …
-
The Development Of Mems-Based Implantable Oxygen Sensing Systems
Oxygen-based cues are direct assessments for a wide range of in vivo biological effects, ranging from mitochondrial disease to tissue engineering/regenerative medicine. Existing electrochemical oxygen sensors are permanent systems applicable to short-term intraoperative use; devices are extracted …
-
Wearable Pulse Oximetry in Construction Environments
… if those activities would prevent the blood gas sensor from detecting the onset of carbon monoxide poisoning. This feasibility study was conducted using a blood oxygen sensor rather than a blood carbon monoxide sensor for several reasons. First, blood gas sensors that measure blood carbon …
-
Solid Electrolyte Oxygen Sensors
… and the emergence of the solid electrolyte oxygen sensor, are traced from the last century to the present time when a number of commercial devices are marketed. General rules are set out for the choice of an electrolytic system for a solid electrolyte oxygen sensor. The major markets and …
-
Supramolecular quantum dot-porphyrin assemblies for biological oxygen sensing
… characterized by hypoxia, the concentration of oxygen is an important indicator of tumor health. Understanding how this parameter changes as a function of disease progression is critical to develop novel targeted therapeutics. New non-invasive sensors must be developed that are small enough to …
-
Quantitative methods for in vitro and in vivo characterization of cell and tissue metabolism
… treatments. Metrics for metabolism span tissue oxygen and pH levels and cellular thermal output. This need is present in research and clinical applications both of which are underserved by existing technologies. This thesis presents the development of three distinct technologies: an implantable …
-
Low-dimensional Models for Real-time Simulation of Internal Combustion Engines and Catalytic After-treatment Systems
… and electrical systems (for hybrid vehicles) and sensor and control systems. In this work, we develop a four-mode low-dimensional model for the in-cylinder combustion process in an internal combustion engine. The lumped parameter ordinary differential equation model is based on two mixing times …
-
Feed-Forward Air-Fuel Ratio Control during Transient Operation of an Alternative Fueled Engine
… reading of the combustion exhaust gases from the oxygen sensor, conventional feedback control cannot be accurately used in transient operation. Since the engine used in this thesis is port-fuel injected, the fuel injection is made a discrete amount of time before the intake valve opening. This …
-
Composition sensors calibration and characterization and warmup analysis for the Mars Oxygen In-Situ Resource Utilization Experiment (MOXIE)
MOXIE, the Mars Oxygen In-Situ Resource Utilization Experiment, is one of the payloads that is being carried on the Mars 2020 Perseverance rover. MOXIE was developed by MIT and NASA's Jet Propulsion Laboratory (JPL) to demonstrate, for the first time, In-Situ Resource Utilization (ISRU) on another …
-
Silicon Piezoresistive Microcantilever For Potentiometric Sensing
… research focus on miniaturization of chemical sensors due to their applications in various fields, e.g., environmental monitoring, medical diagnosis, and national security. In general, a miniaturized chemical sensor inevitably depends on functionalization layers, which alter their electrical …
-
Investigating escape of low MW siloxanes from PDMS matrix in aqueous solution
Knowledge of the oxygen levels in a tumor is a current goal of cancer research due to the importance of hypoxia on tumor growth and treatment. Previous work by the Cima group at MIT has shown that an oxygen sensor made from low molecular weight siloxanes (LMWS) in a PDMS matrix can be implanted …
-
Biomedical sensor for transcutaneous oxygen measurements using thick film technology
The measurement of the partial pressure of oxygen in arterial blood is essential for the analysis of a patient's respiratory condition. There are several commercially available methods and systems to measure this parameter transcutaneously. However, they tend to be cumbersome and costly. To …
-
Calibration of YSZ sensor for the measurement of oxygen concentration in Lbe
… essential to accurately measure and control the oxygen concentration dissolved in LBE. An automobile style voltametric oxygen sensors, with YSZ (Yttria Stabilized Zirconia) as electrolyte and molten bismuth saturated with oxygen as reference was selected. An instrumentation system was designed …
-
On Modeling and Nonlinear Model Reduction in Automotive Systems
… cars. Also, a model of the exhaust gas oxygen sensor, used for air-fuel ratio control in automotive spark-ignition engines, is developed and successfully validated.
-
Engineered sensors and genetic regulatory networks for control of cellular metabolism
… To construct this program, I first developed sensors that detected and propagated relevant information into genetic circuits. These sensors include a novel sensor for genotoxic methylation exposure in Saccharomyces cerevisiae and sensors for oxygen, acetate, and glycolytic flux in E. coli. The …
-
Solid state amperometric sensor for the in-situ monitoring of slag composition and transport properties
Conventional oxygen sensors have been used for several decades for better process control in metals industries. Such devices can accurately determine the oxidation state of the molten metal phase. Investigators understand the importance of the slag phase on the quality of the final product and …
-
Development of an integrated microfluidic platform for oxygen sensing and delivery
… technology was developed capable of generating oxygen directly from water present in blood plasma. This technology is intended to provide a self-contained, mobile oxygen supply suitable for implantation or extracorporeal oxygenation in support of an acute or chronically disabled lung. The core …
-
Study of biomass combustion characteristics for the development of a catalytic combustor/gasifier
… from an inexpensive automobile exhaust gas oxygen sensor. The control strategies and catalytic combustion were implemented on prototype combustor/gasifier and the device was tested with good results. Power turn down ratios of 4 to 1 and 3 to 1 were achieved. The zitconia-type automobile …
-
A HIF-INDEPENDENT PROGRAM SUSTAINS TUMOR TREG FUNCTION IN OXYGEN-DEPRIVED ENVIRONMENTS
… performed time-course RNA-seq of Treg in either oxygen condition and analyzed transcription factor motifs in differential cis-regulatory elements, finding oxygen sensor RBPJ to be enriched in enhancers, which we validated by ChIP. We observed RBPJ upregulation in TI- as opposed to NAT- and PB- …
-
Studies of measurement techniques for indirect chemical sensing based on fluorescence spectroscopy and applications for fibre-optic sensors
… optimised design of interrogators for sensing oxygen using a fluorescent polymer encapsulated ruthenium complex. Two basic interrogation methods were explored, using blue LED excitation.<br/>The Rapid Lifetime Detection (RLD) scheme, a fluorescence interrogation method based on direct …
Page 1 of 2