Events Calendar View

• Departmental Colloquium Jan 17, 2013

  Physics Puts New Lens On Major Eye Disease

  

  Guest: Fereydoon Family, Emory University, Department of Physics
  Thursday, January 17, 2013 4:00 pm - 5:00 pm
  Location: Physics Auditorium (202)

  iCal

  The 21st Century promises a major expansion at the interface of physics with the life sciences. These areas fall outside the conventional boundaries of the scientific disciplines and require a collaborative, multidisciplinary approach. What I hope to show you in this talk is that we have built on techniques and inspirations from physics, particularly condensed matter physics and computational physics, to make exciting progress in understanding a disease called age-related macular degeneration (AMD), which is the leading cause of blindness in adults.

  We have developed a mechanistic model and studied the growth, patterning and progression of the disease. This allowed us to explore and quantitatively test many more combinations of hypotheses and parameter choices than would have been experimentally feasible. As a result, we have uncovered new mechanical instabilities that will have a significant effect on the future development of targeted intervention strategies and clinical treatment of AMD.

• Departmental Colloquium Jan 24, 2013

  Colloidal liquids and glasses: Insights from microscopy

  

  Guest: Eric Weeks, Emory University, Department of Physics
  Thursday, January 24, 2013 4:00 pm - 5:00 pm
  Location: Physics Auditorium (202)

  iCal

  What would we learn if we could clearly see individual atoms deep inside materials?  My group studies colloidal suspensions, which are solid micron-sized particles in a liquid.  In many ways, these particles are analogous to atoms.  At high particle concentration, the sample is a good model system for a glassy material, with the particles randomly packed together.  We use an optical confocal microscope to view the motion of these colloidal particles in three dimensions to see how the motion is changed as the glass transition is approached.  In particular, we will discuss two puzzles.  First, we'll examine how rotational and translational diffusion of tracers differ as the glass transition is approached. Second, we'll study how how the behavior of glassy samples change when they are confined, and how this depends on the nature of the confining boundaries.

• Departmental Colloquium Jan 31, 2013

  Urban Effects on Cloud Dynamics, Precipitation Physics, Thunderstorms, and Floods

  

  Guest: Marshall Shepherd, UGA Geography
  Thursday, January 31, 2013 4:00 pm - 5:00 pm
  Location: Physics Auditorium (202)

  iCal

  Historical and current research continues to suggest that the urban environment itself (e.g., land cover, pollution) may initiate or alter convective storms. Additionally, impervious land cover in cities alters surface hydrological processes. Questions like "do cities create their own storms?" or "did Atlanta's urban land cover enhance historic flood levels?" are not only relevant and but increasingly well-understood.

  Precipitation is a key link in the global water cycle and a proxy for changing climate; therefore, proper assessment of the urban environment's impact on precipitation (land use, aerosols, thermal properties) will be increasingly important in ongoing climate diagnostics and prediction, Global Water and Energy Cycle (GWEC) analysis and modeling, weather forecasting, freshwater resource management, urban planning-design, and land-atmosphere-ocean interface processes. These facts are particularly critical if current projections for global urban growth are accurate. Dr. Shepherd will present the most current scientific thinking and methodologies for studying urban effects on the hydroclimate. He will provide a particular emphasis on how physical attributes of land cover, aerosols, and urban morphology modify precipitation processes (via cloud dynamics, microphysics, etc.). The discussion will also provide insight on future direction and implications for stakeholders and policymakers.

• NanoSEC Seminar Feb 1, 2013

  Preparation of a Ph. D. Student

  

  Guest: Prof. Yiping Zhao
  Friday, February 1, 2013 4:00 pm - 5:00 pm
  Location: Riverbend Research South Laboratory Auditorium

  iCal
• Departmental Colloquium Feb 7, 2013

  Dynamic UC HII regions in Sgr B2: Flickering and Ionized Flows

  

  Guest: Chris DePree, Agnes Scott, Department of Physics and Astronomy
  Thursday, February 7, 2013 4:00 pm - 5:00 pm
  Location: Physics Auditorium (202)

  iCal

  The Sgr B2 star forming region in our Galaxy contains a large sample of HII regions, and the diversity of morphologies and number of unusual broad line sources make it an ideal laboratory for testing theories of ultracompact (UC) HII region evolution. Recent high-resolution, radiation-hydrodynamic simulations show that the dense, rotating, accretion flows required to form massive stars quickly become gravitationally unstable. The resulting HII region flickers between hypercompact (HC) and UC sizes throughout the main accretion phase, rather than monotonically expanding. Imaged at 1.3 cm, the Sgr B2 region contains 49 regions, 25 of which are hypercompact (HC), with physical diameters < 5000 AU. We have re-observed this large sample of UC HII regions in the Sgr B2 region after 23 years in the three hybrid arrays in the 1.3 continuum and H66a and H68a lines with a resolution of 0.25². Preliminary results from these new 1.3 cm EVLA observations of Sgr B2 have revealed that 4 of the 49 sources have significant changes in flux density (>10 sigma).

• NanoSEC Seminar Feb 8, 2013

  Give a good presentation

  

  Guest: Prof. Jason Locklin
  Friday, February 8, 2013 4:00 pm - 5:00 pm
  Location: Riverbend Research South Laboratory Auditorium

  iCal

Page 40 of 121, showing 6 records out of 723 total, starting on record 235, ending on 240