Events Calendar

Physics Colloquium - Graduate Oral Presentations

This is a past event.

Thursday, January 30, 2020, 4 pm– 5 pm

This is a past event.

Thursday, January 30 @ 4pm – Fisher Hall, Room 139

A social with refreshments will be held 30 minutes prior to the talks in the Fisher Hall lobby.

Andrew Puyleart (Advisor: Prof. Brain Fick) will present “Cloud Identification Over the Pierre Auger Observatory Using GOES-16".

The Pierre Auger Observatory’s fluorescence detector (FD) requires clear, moonless nights to operate. To guarantee accurate measurements made with the FD a cloud monitoring system has been in service for many years. This monitoring system uses infrared images from the geostationary operational environmental satellite system (GOES) to search for cloud cover over the array. The previously used satellite, GOES-13, went out of service in December, 2017. An approach with the next generation satellite, GOES-16, has been explored. A new cloud identification algorithm has been devised and ground truthed using the Pierre Auger Observatories central laser facility and Xtreme laser facility. This new algorithm will also be compared to the GOES Clear-Sky Mask product created by the National Oceanic and Atmospheric Administration.


Geeta Sachdeva (Advisor: Prof. Ravindra Pandey) will present “First Principles Study of Interaction of Polymer Molecules with Flat Carbon Nanotubes".

Polymer composites possess an integrated combination of structures and properties associated with the host matrix and fiber material (e.g. carbon nanotubes), and thus holding the potential as high strength materials. In general, the load transfer from the matrix to the fiber depends upon the strength of bonding at the interface which characterizes the mechanical strength.

Extensive experimental studies have identified that the large-diameter (20nm) carbon nanotubes are structurally more stable than tubular shape carbon nanotubes. These nanotubes are termed as flat carbon nanotubes and are proposed as excellent fibers for synthesizing a polymer composite.  Considering graphene to be representative of the surface of a flat carbon nanotubes, we consider its interaction with several polymer monomers using state-of-the-art density functional theory method. It is expected that the results will provide atomistic description of the interface which can then be used as a guidance to understand structure-property relationship of a polymer composite.

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