Theses/Dissertations - Electrical and Computer Engineering
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Browsing Theses/Dissertations - Electrical and Computer Engineering by Author "Bresnahan, Drew G., 1994-"
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Item Classification of human head motion patterns using creeping wave propagations.(2018-04-06) Bresnahan, Drew G., 1994-; Li, Yang, 1982-Wearable electronics are continually being developed for a multitude of applications like remote health monitoring, personal activity tracking, and gaming. To design efficient wireless communication between multiple on-body devices, propagation models of the human body must be considered. Due to the creeping wave effect of radio waves near a curved surface, the human body itself acts as a channel capable of supporting and affecting wireless signals. The around-head creeping wave propagation behavior of three different frequencies has been investigated. Since these continuous frequency signals are affected by the movements of the human body, their altered signatures are also classifiable as effects of distinct daily activities like eating, drinking, breathing, and speaking. To improve the measurement system for practical operation in the field, the network analyzer is replaced with smaller, cheaper sensor alternatives including narrowband and wideband candidates.Item Sensing human physiological motion using millimeter wave radar.(2022-03-28) Bresnahan, Drew G., 1994-; Li, Yang, 1982-For the past 100 years, radio detection and ranging technology, or radar, has been developed to detect the presence and motion of a wide array of objects, vehicles, and living beings. With the advent of small-scale, portable, affordable radar sensors, biological radar sensing has opened a new field of opportunity for healthcare applications such as vital signs detection, fall detection, and gait analysis. Telehealth technology is becoming a popular method to replace in-person office consultations for simple medical visits, reducing costs significantly. However, telehealth communication currently lacks the sensors required to provide the clinician a direct line of information about the patient’s physical condition. Radar can measure a variety of physiological motions for basic health checkups and become another diagnostic tool in the doctor’s arsenal. Furthermore, radar can act as a preventive safety device by detecting human drowsiness or distraction. This dissertation details the procedures and analysis of employing a single millimeter-wave radar unit to measure human vital signs, head movements, deep tendon reflex motion, and hip movements.