Michael Mayor, P.E.

This talk addresses Satellite based Navigation and timing Global Navigation Satellite Systems (GNSS), whereby a constellation of satellites transmits radio frequency signals from which a passive receiver, on the surface of the earth or on the air, can determine time and position. This is called “Geolocation”.

Starting with a historical introduction on the development of Satellite Navigation Systems we present some basic concepts of orbital mechanics and an overview of the currently deployed (or planned deployment) of GNS Systems, explaining why different orbits and constellations were chosen.

Subsequently I will address basic concepts of space based geolocation signaling systems and what is required to provide accurate geolocation based on cooperative transmitter / receiver systems. A reference is made to non-cooperative systems, whereby signals of unknown origin and characteristics are geolocated.

Furthermore, I will present the engineering design and tradeoffs of signaling systems used in satellite navigation systems, addressing factors which improve and/or degrade accuracy.

Finally, I will describe GPS receivers and their hardware implementation with modern micro components semiconductors.

Biography:

Mr. Mayor is currently an engineering consultant providing Telecommunications Systems Engineering Services in the area of Secure wireline and wireless Communications Networks. His consulting services extend to Digital Signal Processing Algorithm development, RF propagation analysis and applying Model Based Systems Engineering Design. Formerly, he was Vice President, Advanced Technology Research, at ITT Defense Electronics. In this capacity, he conducted Research and Directed the Development of a wide range of secure communications systems and their components, including Radio Frequency Transceivers, Software Defined and Cognitive Radio Systems, Digital Receivers, Digital Signal Processing algorithms and Precision Emitter Geolocation Systems. He authored six patents in the areas of Spread Spectrum Communications and Digital Instrumentation.

Mr. Mayor is a Licensed Professional Engineer and holds an MSE from the Moore School of EE, University of Pennsylvania. He is a member of the National Society of Professional Engineers (NSPE), and a Senior Member of the Institute of Electrical and Electronic Engineers (IEEE).

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Dr. Margaret Wheatley

Tumors grow rapidly, and as the mass of cells grows, it sends out signals to neighboring capillary blood vessels to sprout and grow into the tumor mass to deliver nutrients and facilitate gas exchange (oxygen for cellular respiration, carbon dioxide as a waste product of respiration).  But metabolic rate in cancer cells is very high, and the leaky nature of the new vessels coupled with a lack of lymphatic drainage cause a high pressure to build up, restricting transport of these molecules. As a result, many areas in the tumor lack oxygen, that is they become hypoxic. Cancer cells are nothing if not very sneaky and they change their metabolism to compensate for this, and cells in these hypoxic areas become resistant to chemo- and radiation therapy. We are working on developing injectable, stabilized micro bubbles to deliver oxygen to these hypoxic areas, to restore sensitivity to drug and radiation therapy.

Biography:

Dr. Maggie Wheatley received her BS in Chemistry from Oxford University, UK, and an MS in Biochemistry from the same institution. She saw the engineering light and pursued her PhD in Chemical Engineering at the University of Toronto, Canada, and then went on to do a post doc. with Dr. Langer at MIT, Boston, investigating controlled drug delivery. Subsequently, after a three-year taste of industry at Glaxo Smith Kline research facility at King of Prussia, she joined the Department of Chemical Engineering as the first female faculty in 1987. In 1998 she joined The School of Biomedical Engineering Science and Health Systems at Drexel as an inaugural faculty member. Dr. Wheatley’s main research area is development of novel polymeric platforms to act as contrast agents for diagnostic ultrasound, with a strong interest in drug delivery and drug targeting in cancer. Recent collaborations have included targeting liver cancer with colleagues at University of Pennsylvania and pancreatic cancer with colleagues at Thomas Jefferson University Hospital. She also has projects in developing polymer constructs for spinal cord repair.

Email:

Michael Mayor, P.E.

Biography:

Email:

Dr. Margaret Wheatley

Biography:

Email:

Michael Mayor, P.E.

Biography:

Email:

Dr. Margaret Wheatley

Biography:

Email: