Upcoming Seminars

Week of January 15Week of January 22Week of January 29Week of February 5

Chemical Engineering

Kinetic, Spectroscopic, and Theoretical Investigations of Light Hydrocarbon Reactions in Porous Catalytic Materials

Tuesday, January 16, 2018; 10:50 am
102 Chemistry Building
Speaker: Michele L. Sarazen from Georgia Institute of Technology

The optimization and potential industrial application of porous catalysts requires understanding how properties of these materials affect their reactivity and selectivity and how to control these properties via advanced synthesis strategies.

Hosted by: Dana Hosko,  Chemical Engineering  (814-865-2577)

Biological and Chemical Conversion of Lignocellulose and Plastics

Thursday, January 18, 2018; 10:50 am
102 Chemistry Building
Speaker: Gregg Beckham from National Renewable Energy Laboratory

Biological and Chemical Conversion of Lignocellulose and Plastics

Hosted by: Dana Hosko,  Chemical Engineering  (814-865-2577)

Engineering Dean's Office

Best Practices for Working with Chinese Students at PSU (Part 2)

Thursday, January 18, 2018; 12-1:30
202 Hammond Building (Stavely Conference Room)
Speaker: Jennifer Wu from Penn State University

There was such strong interest in more discussion on working with students from China that the Leonhard Center will hold a second lunch workshop on this topic.  The entire workshop will be devoted to discussion.  We will start with advising and teamwork, and then move onto other topics that the group suggests.  Jennifer Wu, Moses Ling, and Xinli Wu will add their personal experiences and insights during our discussions.  Tom Litzinger will facilitate the discussions. The workshop will be held from 12:00 to 1:30 in 202 Hammond on Thursday January 18. Lunch will be provided. For those who may have missed the first workshop on this topic, we posted a video of that workshop here:  http://sites.psu.edu/engrjenniferwu/ .


Hosted by: Sarah Zappe,  The Leonhard Center  (ser163@psu.edu)

Engineering Science and Mechanics

Photonics at the Exceptional Points: From Optical Sensing to Optomechanics

Wednesday, January 17, 2018; 3:35 pm
103 Leonhard Building
Speaker: Sahin K. Ozdemir from Dept of Engineering Science and Mechanics, PSU

Abstract: Whispering-gallery-mode (WGM) microresonators have emerged as excellent platforms for optical sensing, cavity-QED, optomechanics, low threshold lasing, and most recently for the realization of parity-time (PT) symmetry in optics. They represent open physical systems due to optical losses originating from absorption, coupling and radiation, and thus they are characterized by non-Hermitian Hamiltonians. By engineering their loss/gain profiles and coupling to other systems, WGM resonators can be brought to a non-Hermitian degeneracy known as an exceptional point (EP), where complex eigenvalues and the corresponding eigenstates of the system coalesce. The presence of an EP affects the system significantly, leading to nontrivial physics with interesting features. In this talk, after briefly reviewing the physics and the applications of WGM microresonators that we have developed in the past few years (e.g., detection and characterization of single nanoparticles, aerosols and virions), I will discuss the control of optical processes and the flow of light in WGM microresonators by operating them in the vicinity of EPs. I will discuss how we used these resonators to demonstrate (1) PT-symmetry and its breaking for nonreciprocal light transmission, (2) loss-induced lasing, (3) chiral modes and on-demand control of emission direction of WGM lasers, and (4) enhanced optical sensing beyond what is capable with conventional optical sensors. I will end the talk giving a brief summary of other interesting phenomena we study with WGM resonators (e.g., slow-fast light, Brillouin laser, chaos transfer, etc.) and discussing some of the opportunities and challenges in photonics research, in particular within the framework of non-Hermitian optics.

Hosted by: Dr. Akhlesh Lakhtakia,  Engineering Science and Mechanics  (tms4@engr.psu.edu)

Fluid Dynamics Research Consortium

Full-field Temperature Measurement for the Constrained Numerical Calculation of Sooting Laminar Coflow Diffusion Flames

Thursday, January 18, 2018; 9:00 AM
362 Willard Bldg
Speaker: Nathan J. Kempema from Penn State Applied Research Lab

In this work, optical diagnostic techniques were applied in a standardized series of nitrogen-diluted ethylene diffusion flames stabilized on the Yale Coflow Burner. These flames were designed to provide a multi-dimensional and yet computationally tractable environment in which to study the formation, growth, and oxidation of soot particles. Chemically reacting flows, such as the sooting flames studied here, are the product of several highly coupled phenomena that includes chemical reaction, fluid dynamics, heat transfer, and mass transport. As such, it can be difficult to directly compare computational results to an experimentally measured parameter given the myriad of details that affect the computed parameter. In this talk, I will discuss how the two-dimensional temperature fields of the Yale coflow flames were measured experimentally and used to constrain a numerical simulation by fixing the temperature at each grid point. Thus, the computed temperature field was not driven by heat release from the chemical model or affected by distributed heat losses, and differences may be observed in species concentration or soot volume fraction between the constrained and unconstrained solutions. Bio: Nathan J. Kempema is an R&D Engineer in the Technology, Concepts and Modeling Department of the Energy Science and Power Systems Division of Penn State’s Applied Research Laboratory. He holds B.S. and M.S. degrees in Mechanical Engineering from Washington University in St. Louis, MO, and a Ph.D. in Mechanical Engineering from Yale University in New Haven, CT.


Hosted by: Alex Rattner,  Fluid Dynamics Research Consortium  (Alex.Rattner@psu.edu)

Mechanical and Nuclear Engineering

Muon Detection Applications

Thursday, January 18, 2018; 4:00 - 5:30 pm
22 Deike Building
Speaker: Azaree Lintereur from The Pennsylvania State University

Dr. Azaree Lintereur joined the Mechanical and Nuclear Engineering Department at Penn State University as an Assistant Professor in August 2017 and is establishing a detector development laboratory. Prior to joining Penn State University Dr. Lintereur was at the University of Utah, where she led the development of a radiation detection research program. She did a postdoc at Pacific Northwest National Laboratory where her research focused on 3He alternatives for neutron detection, and pulse shape discrimination methods for neutron-gamma ray sensitive materials. Her research interests include radiation detector development, nondestructive assay techniques, international safeguards, and 3He alternative technologies.

Hosted by: Arthur Motta,  Mechanical Engineering  (amb52@psu.edu)

Mechanical Engineering

3D Printing, Humanitarian Engineering and Social Entrepreneurship

Tuesday, January 16, 2018; 4:00 - 5:30 pm
135 Reber Building
Speaker: John Gershenson from The Pennsylvania State University

Developing communities don’t have access to the efficient supply chains that bring replacement parts for medical equipment and other medical necessities to provide adequate healthcare to their rural health care facilities. What if we could solve this problem in a way that allows nearly anyone anywhere to use 3D printing to solve some of their supply chain problems? This talk will highlight one example of how engineering and social entrepreneurship mix to solve humanitarian problems and how everyone can get more involved in the challenges that can change the world.

Hosted by: Karen Thole,  Mechanical Engineering  (amb52@psu.edu)

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