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Alternative materials for radiovoltaics
(University of Missouri--Columbia, 2017)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] This work explores alternative materials for the improvement of radiovoltaic devices. First, lithium fluoride is explored as an effective material for ...
Moving object localization using frequency measurements
(University of Missouri--Columbia, 2021)
This research investigates the ability of locating a moving object using the Doppler shifts of a carrier frequency signal sent or re ected by the object and observed by several fixed or moving sensors spatially distributed ...
Non-invasive monitoring of vital signs using recliner chair and respiratory pattern analysis
(University of Missouri--Columbia, 2018)
In-home monitoring has the potential to help track health changes for older adults with chronic health conditions, thereby making early treatment possible when exacerbations arise. A recliner chair is often used by older ...
Sleep stage classification using hydraulic bed sensor
(University of Missouri--Columbia, 2018)
Sleep monitoring can help physicians diagnose and treat sleep disorders. Polysomnography(PSG) system is the most accurate and comprehensive method widely used in sleep labs to monitor sleep. However, it is expensive and ...
A study of the effects of cycling frequency on lithium-ion and lithium polymer batteries' degradation
(University of Missouri--Columbia, 2020)
Conventional energy sources are depleting rapidly and might last for another 50-150 years depending on our current usage. Environmental issues like global warming are also rising quickly. Renewable energy sources can address ...
Fall detection using sound sensors
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] More than 1/3 of adults aged 65 and older fall each year in the US. The fall causes injures or serious health problems which have the related medical ...
An ATP/EMTP model for the study of both normal and abnormal substation equipment operation
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In electric utility, overcurrent and overvoltage transients in switching operations often cause severe damage on the power system equipments. In this ...
Shallow trench isolation process in microfabrication for flash (NAND) memory
(University of Missouri--Columbia, 2008)
Technology is steadily advancing where semiconductors and microelectronics have become such a huge source of revenue and area of technological interest, resulting in reduced device geometries and more complicated microelectronic ...
A TEM cell design to study electromagnetic radiation exposure from cellular phones
(University of Missouri--Columbia, 2008)
A transverse electromagnetic (TEM) cell was designed and fitted with a double ended monopole antenna as a signal leader in order to couple electromagnetic radiation from GSM 900 and 1800 commercial cellular phones into a ...
High-speed, high-accuracy method for mutual inductance calculations
(University of Missouri--Columbia, 2008)
Three methods for calculating the mutual inductance of coils are examined and compared: a finite-element field code analysis method, theoretical analysis method, and F. W. Grover's tabular method. These methods are applied ...
Magnetoresistance in semiconductor-metal hybrids for power applications
(University of Missouri--Columbia, 2008)
Extraordinary magnetoresistance (EMR) in semiconductor-metal hybrids has been studied exclusively for sensor applications. However, some properties of EMR-based devices are potentially advantageous for power applications. ...
The ferroelectric plasma thruster
(University of Missouri--Columbia, 2008)
Micropropulsion is an enabling technology for microspacecraft. As requirements for microspacecraft missions become more demanding, so do the requirements for micropropulsion. Therefore, existing technologies require ...
High-speed non-invasive thermal analysis of high-power light-emitting diode arrays
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Light-emitting diodes (LEDs) are pervasive in many of today's technologies. Continued maturation of the technology coupled with interest in energy ...
Activity segmentation with special emphasis on sit-to-stand analysis
(University of Missouri--Columbia, 2010)
In this study, we present algorithms to segment the activities of sitting and standing, and identify the regions of sit-to-stand transitions in a given image sequence. As a means of fall risk assessment, we propose methods ...
Ex situ variable angle spectroscopic ellipsometry studies on chemical vapor deposited boron-doped diamond films : layered structure and modeling aspects
(University of Missouri--Columbia, 2008)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Diamond possesses several outstanding physical properties (mechanical hardness, thermal conductivity, chemical inertness and high index of refraction) ...
A high voltage piezoelectric transformer for active interrogation
(University of Missouri--Columbia, 2009)
A resonant piezoelectric transformer circuit was developed for high voltage generation. The goal of this project was to produce 100 kV with a reasonably sized piezoelectric crystal. Several mechanisms leading to less than ...
Gas pumping efect from dielectrophoretically driven liquid droplet in a closed microfluidic channel
(University of Missouri--Columbia, 2010)
This dissertation describes the study of dielectrophotoretically controllable droplet's movement in a closed-side microfluidic channel for a micro gas pump application. A micro gas pump using a aqueous core has been ...
An optics study of mammal skin and its transmission properties
(University of Missouri--Columbia, 2013)
A detailed study is performed to understand infrared photonic transmission through skin and the factors that influences transmission at room temperature. Pigskin is the test vehicle of this study since its structure most ...
Design and application of conformal patch antenna for near-field imaging and object detection
(University of Missouri--Columbia, 2013)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Compact and low cost planar and conformal patch antennas were designed, fabricated and analyzed for ultra-wideband characteristics. It was also ...
High accuracy in 3D reconstruction by fusion of IMU and imaging data: application in health medicine
(University of Missouri--Columbia, 2014)