The design and evaluation of discrete wearable medical devices for vital signs monitoring

The observation, recording and appraisal of an individual’s vital signs, namely temperature, heart rate, blood pressure, respiratory rate and blood oxygen saturation (SpO2), are key components in the assessment of their health and wellbeing. Measurements provide valuable diagnostic data, facilitating clinical diagnosis, management and monitoring. Respiratory rate sensing is perhaps the most under-utilised of all the vital signs, being routinely assessed by observation or estimated algorithmically from respiratory-induced beat-to-beat variation in heart rate. Moreover there is an unmet need for wearable devices that can measure all or most of the vital signs. This project therefore aims to a) develop a device that can measure respiratory rate and b) develop a wearable device that can measure all or most of the vital signs. An accelerometer-based clavicular respiratory motion sensor was developed and compared with a similar thoracic motion sensor and reference using exhalatory flow. Pilot study results established that the clavicle sensor accurately tracked the reference in monitoring respiratory rate and outperformed the thoracic device. An Ear-worn Patient Monitoring System (EPMS) was also developed, providing a discrete telemonitoring device capable of rapidly measuring tympanic temperature, heart rate, SpO2 and activity level. The results of a comparative pilot study against reference instruments revealed that heart rate matched the reference for accuracy, while temperature under read (< 1°C) and SpO2 was inconsistent with poor correlation. In conclusion, both of the prototype devices require further development. The respiratory sensor would benefit from product engineering and larger scale testing to fully exploit the technology, but could find use in both hospital and community-based The design and evaluation of discrete wearable medical devices for vital signs monitoring DG Pitts ii Cranfield University monitoring. The EPMS has potential for clinical and community use, having demonstrated its capability of rapidly capturing and wirelessly transmitting vital signs readings. Further development is nevertheless required to improve the thermometer probe and resolve outstanding issues with SpO2 readings

Modelling, control and analysis of a voltage source converter

The present thesis describes the modelling and control of a three-phase voltage source converter for electrochemical storage systems and renewable energy generation connected to the grid by means of a simplified averaged model. Open and closed-loop control structures based on lineal classical controllers are explored. Control scheme, including PLL, inner current loop and outer loops (active and reactive power and DC voltage), is detailed and parametrisation of the controllers is carried out. The dynamic model is implemented and its simulations are used to further study the converter’s response. Voltage dip faults, capability curves and current limitation and voltage stability under different grid impedance are analytically discussed and in depth analyzed through simulationsLa present tesi descriu la modelització i el control d’un convertidor trifàsic de font de voltatge per a sistemes d’emmagatzematge electroquímic i generació d’energia renovable con- nectats a la xarxa mitjançant un model simplificat mitjà. Es fan exploracions de les estructures de control en llaç obert i tancat basades en controladors clàssics lineals. Es detalla el sistema de control, incloent el PLL, el llaç de corrent intern i els llaços externs (potència activa i reactiva i voltatge DC) i es realitza la parametrització dels controladors. El model dinàmic s’implementa i les simulacions s’utilitzen per aprofundir en l’estudi de la resposta del convertidor. Les faltes de caiguda de tensió, les corbes de capacitat i les limitacions de corrent i la estabilitat de voltatge envers diferents impedàncies de xarxa primer es discuteixen analíticament i després s’analitzen a fons mitjançant simulacionsLa presente tesis describe la modelización y control de un convertidor trifásico de fuente de voltaje para sistemas de almacenamiento electroquímico y generación de energía renovable conectados a la red mediante un modelo simplificado promedio. Se exploran estructuras de control en lazo abierto y cerrado basadas en controladores clásicos lineales. Se detalla el sistema de control, incluyendo el PLL, el lazo de corriente interno y los lazos externos (potencia activa y reactiva y voltaje DC) y se realiza la parametrización de los controladores. El modelo dinámico se implementa y las simulaciones se utilizan para profundizar en el estudio de la respuesta del convertidor. Las faltas de caída de tensión, las curvas de capacidad y las limitaciones de corriente y la estabilidad de voltaje bajo diferentes impedancias de red se discuten primero analíticamente y luego se analizan en profundidad mediante simulacione

2011-2012

Contains information on courses and class descriptions as well as campus resources at Collin College.https://digitalcommons.collin.edu/catalogs/1023/thumbnail.jp

Technology 2003: The Fourth National Technology Transfer Conference and Exposition, volume 2

Proceedings from symposia of the Technology 2003 Conference and Exposition, Dec. 7-9, 1993, Anaheim, CA, are presented. Volume 2 features papers on artificial intelligence, CAD&E, computer hardware, computer software, information management, photonics, robotics, test and measurement, video and imaging, and virtual reality/simulation

Kazakhstan's Diversification from the Natural Resources Sector: Strategic and Economic Opportunities

This book explores opportunities for diversifying modern Kazakhstan's economy, which is still heavily dependent on its natural resources, as well as looking at economic opportunities for the whole Central Asian region arising from the Chinese government's Belt and Road Initiative (BRI). The book is comprised of four parts. Part 1 explores the first main theme of the book: development of the economy based on the resource sector with the example of Kazakhstan. Part 2 examines opportunities for diversification arising from BRI: a rise of transport and communication industries alongside the new Belt and Road economic route. Part 3 explores the view from China on the perspectives of regional development, not least the economic reasons for the launch of this programme, investments and planned effects. Part 4 discusses other internal sources for diversification of the economy in Kazakhstan based on development of local industry in the oil and gas sector, small- and medium-sized enterprises and tertiary sector of the economy. This book will be of value for students, academics, policy-makers, and practitioners focused on economic development and business in the Central Asian region, as well as those who are working on the design of instruments for economic development in their own countries

The 1994 Silver Anniversary of APOLLO 11: From the Moon to the Stars

This report summarizes the technology transfer, advanced studies, and research and technology efforts in progress at Marshall Space Flight Center (MSFC) in 1994

2006-2007

Contains information on courses and class descriptions as well as campus resources at Collin College.https://digitalcommons.collin.edu/catalogs/1018/thumbnail.jp

2003-2004

Contains information on courses and class descriptions as well as campus resources at Collin College.https://digitalcommons.collin.edu/catalogs/1015/thumbnail.jp