Wednesday, October 21, 2:30 PM
Dr. Kaitlin Rasmussen
Department of Astronomy
University of Michigan
From Galaxies to Stars to Planets: A Research Journey
As an undergraduate, I studied active galactic nuclei. Then, in graduate school, I studied metal-poor stars and the origins of the elements. Now, as a post-doc, I study the winds and climates of other planets. In this three-part talk, I will discuss my journey from college to now alongside my research in these fields and what I learned along the way.
Wednesday, November 11, 2:30PM
Prof. Mikhail Kats
Department of Electrical and Computer Engineering
University of Wisconsin - Madison
Engineering and measurement of thermal radiation
Thermal emission (thermal radiation) is the phenomenon responsible for most of the light in the universe. Though understanding of thermal emission dates back over a century, recent advances have encouraged the re-examination of this phenomenon and its applications. This talk will describe our group’s advances and outline future work in the measurement and manipulation of thermal emission. First, I will discuss our efforts to improve thermal-emission metrology, especially for low-temperature thermal emitters, emitters with temperature-dependent emissivity, and emitters out of equilibrium. Such improvements can enable techniques such as depth thermography, in which measurements of thermal emission yield temperature information below the surface of objects. Then, I will describe our use of phase-transition materials including vanadium dioxide and rare-earth nickelates to demonstrate new phenomena, including negative- and zero-differential thermal emittance, radiative thermal runaway, and thermo-dichroism. I will also discuss our recent demonstration of nanosecond-scale modulation of emissivity and thermal-emission pulses down to picosecond scales. The talk will include discussion of exciting opportunities of thermal-emission engineering for infrared camouflage and thermoregulation.
Wednesday, November 18, 2:30PM
Marissa Vaccarelli (FCRH 2018)
M.D. Anderson Cancer Center
Applications of Dose Calculation Algorithms in Medical Physics
This presentation will discuss the various classes of dose calculation algorithms used in radiation therapy treatment planning as well as research applications. Model and direct methods such as convolution superposition and Monte Carlo, respectively, will be highlighted. Two projects harnessing the automated calculation of therapeutic dose in radiation oncology will be examined. First, knowledge -based treatment planning involves dose estimation based on organ segmentation on computed tomography (CT) simulation images. Using the Anisotropic Analytical Algorithm (AAA) of the Eclipse Treatment Planning System, an iterative optimization approach can be utilized to auto - generate clinically feasible plans. Second, rapid dose calculation can also be used for managing and mitigating intra-fractional patient motion during treatment delivery.
Wednesday, December 2, 2:30PM
Charlie Carver (FCRH 2018)
AmphiLight: Direct Air-Water Communication with Laser Light
Air-water communication is fundamental for efficient underwater operations, such as environmental monitoring, surveying, or coordinating of heterogeneous aerial and underwater systems. Existing wireless techniques mostly focus on a single physical medium and fall short in achieving high-bandwidth bidirectional communication across the air-water interface. We propose a bidirectional, direct air-water wireless communication link based on laser light, capable of (1) adapting to water dynamics with ultrasonic sensing and (2) steering within a full 3D hemisphere using only a MEMS mirror and passive optical elements. In real-world experiments, our system achieves static throughputs up to 5.04 Mbps, zero-BER transmission ranges up to 6.1m in strong ambient light conditions, and connection time improvements between 47.1% and 29.5% during wave dynamics.