Physics Commons^™

Simultaneous Radar And Video Meteors, Robert J. Weryk

Electronic Thesis and Dissertation Repository

The goal of this thesis is to better understand the physical and chemical properties of meteoroids by using simultaneous radar and video observations of meteors. The Canadian Meteor Orbit Radar (CMOR) and several Gen-III image-intensified CCD cameras were used to measure common meteors and validate metric errors determined through Monte Carlo modelling and to relate radar electron line density (q) to video photon radiant power (I). By adopting an ionisation coefficient from Jones (1997) and using recorded measurements of q/I, a corresponding estimate of the fraction of meteoroid kinetic energy loss converted into light (luminous efficiency) was found.

It was …

Hyperpolarized Noble Gas Magnetic Resonance Imaging And Dynamic Spectroscopy For Investigation Of Rat Models Of Lung Inflammation, Matthew S. Fox

Electronic Thesis and Dissertation Repository

Imaging of the lungs using non-ionizing approaches such as hyperpolarized ³He and ¹²⁹Xe magnetic resonance imaging (MRI) is a useful tool both for research and clinical applications. This work focused on development of ¹²⁹Xe MRI techniques to investigate inflammation in rat lungs. A rodent model of inflammation, specifically radiation-induced lung injury (RILI) was developed using a collimated ⁶⁰Co source. A quantitative MRI technique measuring absolute ventilated lung volume (|VLV|) was performed using ¹²⁹Xe and ³He. Following a comparison between |VLV| values obtained from rats using the previously established ³He method and those obtained …