Science Events at Bard

Beyond the Diffraction Limit: Imaging and Writing 3D Polymer Nanostructures with Visible Light
Friday, June 29, 2018
Recent developments in far-field microscopy have enabled imaging at nanoscale resolutions using visible light. The circumvention of the diffraction limit opens the benefits of optical microscopy to polymer systems at the relevant nanometer length scales. These benefits include the ability to non-destructively provide local, dynamic and three-dimensional structural information. Specific examples related to colloidal crystals and block copolymers that would be challenging to image with contemporary techniques are used to highlight the potential of subdiffraction far-field fluorescence microscopy for the polymer and nanosciences. Ongoing work on imaging of nanoscale variations in cross-link density of colloidal gels and the application of super-resolution optics to lithography will also be presented.

Chaitanya Ullal is an assistant professor in the Department of Materials Science and Engineering at the Rensselaer Polytechnic Institute. He got his PhD in materials science and engineering at MIT and did a postdoc in the lab of Stefan Hell, at the MPI-BPC in Germany. He is a recipient of the NSF CAREER Award and the ACS PRF New Investigator Award. His research interests are related to unconventional nanofabrication, optics and polymers. A current emphasis of the group is the use of optical microscopy with nanoscale resolution to image and pattern nanostructured polymers.

Time:3:00 pm – 4:00 pm
Location:Reem-Kayden Center Laszlo Z. Bito '60 Auditorium
Sponsor:Bard Summer Research Institute; Dean of the College
Contact:Chris LaFratta
E-mail:clafratt@bard.edu
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Past Events:

Sewage, Sewage, Everywhere: Land, Air, and Water Exchange of Sewage Bacteria in the Saw Kill Watershed
Friday, June 22, 2018
The extra-enteric ecology of sewage-indicating bacteria presents complexities for their use in management of water resources. Once released into the environment, these indicators may persist in sediments, and participate in multidirectional microbial exchange among water, sediment, and air. This complicates sewage pollution detection in public waterways, particularly in shallow freshwater tributaries prone to sediment resuspension. To address these challenges, we compared bacterial communities in sediment, water, and air in a small tributary of the Hudson River, above and below a sewage outflow. Using both culture-based and culture-independent methods, we found that sewage-associated bacteria, including sewage indicators, were present in sediment, water, and air on this waterway. Microbial communities from these ecological compartments were distinct, with sediment samples harboring greater microbial diversity than overlying water. Microbial communities responded to precipitation events, with water and sediment samples increasing in similarity with increases in waterway turbidity. While sediment samples clearly harbored sewage-indicating bacteria, they maintained a lower diversity of sewage-associated bacteria when compared to overlying water, suggesting that sediments may selectively promote environmental persistence of sewage-indicating bacteria.
Location: Reem-Kayden Center Laszlo Z. Bito '60 Auditorium
Sponsor: Bard Summer Research Institute; Dean of the College

Exoplanets: Worlds Beyond Our Solar System
Friday, June 15, 2018
The idea that worlds exist beyond our solar system, exoplanets, dates back to the Greek times, but it was not until 1992 that the first exoplanet discovery was accepted by the scientific community. Detections of exoplanets continued at a crawl until the Kepler mission began in 2009. To date, over 3,700 exoplanets have been confirmed using a variety of techniques. The types of exoplanets detected range from incredibility hot, Jupiter-size exoplanets to Earth-like exoplanets that may be habitable for life.
                                                                                                         
First, we’ll discuss the motivation behind exoplanet science and explore the subject from a historical perspective. We will investigate how some of the detection methods work and discuss their relative successes. Finally, we will conclude by exploring the reflected light of exoplanets in more detail and will discuss two methods of modeling that light.

 
Location: Reem-Kayden Center Laszlo Z. Bito '60 Auditorium
Sponsor: Bard Summer Research Institute

Math Study Room
Tuesday, May 22, 2018

Location: RKC 111
Sponsor: Learning Commons; Mathematics Program

Biology Tutoring Hours
Tuesday, May 22, 2018

Location: RKC pods
Sponsor: Biology Program

Math Study Room
Monday, May 21, 2018

Location: RKC 111
Sponsor: Learning Commons; Mathematics Program

Biology Tutoring Hours
Monday, May 21, 2018

Location: RKC pods
Sponsor: Biology Program

Math Study Room
Sunday, May 20, 2018

Location: RKC 111
Sponsor: Learning Commons; Mathematics Program

Biology Tutoring Hours
Sunday, May 20, 2018

Location: RKC pods
Sponsor: Biology Program

Astronomy Night: Jupiter over Montgomery Place
Thursday, May 17, 2018
Buses leave from Kline South stop at 8:30 pm.

Join us at the Montgomery Place visitor center for a short talk by Prof. Antonios Kontos on the science of Jupiter—from the days of Galileo to the latest NASA missions—followed by telescope viewing of Jupiter and its moons, a guided tour of the night sky, and a round of ask-a-physicist-anything.

 
Sponsor: Physics Program

Math Study Room
Thursday, May 17, 2018

Location: RKC 111
Sponsor: Learning Commons; Mathematics Program

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