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Chemical Engineering

Assembling colloidal mixtures into functional soft materials


Tuesday, January 21, 2020; 10:50 am
350 Health & Human Development Building
Speaker: Dr. Michael Howard from The University of Texas at Austin

Assembling colloidal mixtures into functional soft materials

https://www.che.psu.edu/department/seminars.aspx

Hosted by: Dana Hosko,  Chemical Engineering  (dlh55@psu.edu)

New Design Approaches to Adsorptive CO2 Capture and Catalytic C02 Conversion to Chemicals and Fuels


Wednesday, January 22, 2020; 3:30pm
104 Thomas Building
Speaker: Chunshan Song from Penn State University, Department of Energy & Mineral Engineering

New Design Approaches to Adsorptive CO2 Capture and Catalytic CO2 Conversion to Chemicals and Fuels

Hosted by: Mike Janik,  Chemical Engineering  (mjanik@psu.edu)

FexNi100-xOy Electrocatalysts for the Oxygen Evolution Reaction: Role of Electrochemical History and As-Synthesized Properties on Atomic Structure


Thursday, January 23, 2020; 10:50 am
350 Health & Human Development Building
Speaker: Dr. Lauren Greenlee from University of Arkansas

FexNi100-xOy Electrocatalysts for the Oxygen Evolution Reaction: Role of Electrochemical History and As-Synthesized Properties on Atomic Structure

https://www.che.psu.edu/department/seminars.aspx

Hosted by: Dana Hosko,  Chemical Engineering  (dlh55@psu.edu)

Computer Science and Engineering

Toward Powerful AI Agents Users Understand and Trust


Monday, January 20, 2020; 10:00 a.m.
W375 Westgate
Speaker: Bryan Plummer from Boston University

Abstract: I will describe how my research enables AI to learn relationships between complex, unstructured inputs, specifically: 1) similarity relationships between two images (e.g., that a matching top and skirt are similar), and 2) similarity between descriptive text and an image or video (e.g. that a caption is similar to the image it describes). I will focus on two contributions. First, my research has greatly expanded our understanding of the relationship between vision and language, including introducing the task of phrase grounding, which relates natural language phrases to image regions, along with a new dataset called Flickr30K Entities that is commonly used to train these models. Second, I will present my work in learning explainable visual similarity methods that can capture a greater variety of similarity functions than those in prior works. Biography: Dr. Bryan Plummer is currently a Research Assistant Professor in the Department of Computer Science at Boston University. He completed his Ph.D. in Computer Science at the University of Illinois at Urbana-Champaign in 2018, after which he became a postdoctoral associate at Boston University before joining as a member of the faculty. His primary research interests are in Machine Learning, Computer Vision, Vision, Language Understanding, and Robotics. He is a member of the Image and Video Computing group at Boston University, where he currently supervises 4 graduate students and 2 undergraduates. He has an excellent track record of producing innovative research and a commitment to teaching and outreach.

Hosted by: Daniel Kifer,  Computer Science and Engineering  (duk17@psu.edu)

Engineering Science and Mechanics

Hydrogen in Zirconium Alloy Nuclear Fuel Cladding


Wednesday, January 22, 2020; 15:35 - 16:25
114 EES Building
Speaker: Arthur T. Motta from Department of Nuclear Engineering, Penn State University

Abstract:  In face of increasing worldwide demand for electricity generation and the increasing concerns with the contribution of fossil fuel emissions to climate change, nuclear power is again being considered for further development in the US and abroad. New reactor construction is being proposed, using both, evolutionary concepts based on the current fleet of Light Water reactors (LWRs) and advanced reactor concepts. The materials used in these reactors must maintain outstanding performance for years, or even decades, in an extreme environment, in which they are exposed to a combination of high temperature and pressures, aggressive chemistry and a constant fast neutron flux. As utilities and fuel vendors attempt to push materials to higher temperatures and doses many challenges become apparent, one of the foremost being hydrogen degradation of the nuclear fuel cladding. During reactor exposure the nuclear fuel cladding undergoes  corrosion by the high temperature water. The associated hydrogen pickup can lead to hydride formation which can severely impact fuel cladding properties such as strength, ductility, corrosion resistance and fracture toughness. The behavior of hydrogen in the cladding has been the subject of continued study. In addition to the overall hydrogen concentration it is necessary to predict the formation of specific hydride morphologies that impact mechanical properties. Experimental techniques such as synchrotron radiation diffraction and fluorescence can yield unique insights into this phenomenon so that the margins can be evaluated, and mitigating strategies can be devised to allow higher burnup with its associated longer exposures. We will review these concepts and challenges to implement them as well as the opportunities to use current advances in computational techniques and in experimental tools and techniques to understand these processes in a fundamental manner. Bio:  Arthur Motta is the Chair of the Nuclear Engineering Program and a Professor of Nuclear Engineering and Materials Science and Engineering at Penn State University. He holds degrees in Mechanical Engineering and Nuclear Engineering from the Federal University of Rio de Janeiro, Brazil, and a Ph.D. in Nuclear Engineering from the University of California, Berkeley. Before joining the Penn State faculty in 1992, he worked as a research associate for the CEA at the Centre for Nuclear Studies in Grenoble, France, for two years and as a post-doctoral fellow for AECL at Chalk River Laboratories in Canada. Prof. Motta works in the area of radiation damage and environmental degradation to materials with specific emphasis in Zr alloys, with current projects in the areas of mechanical testing, corrosion and radiation damage. He has special interests in using advanced characterization techniques such as x-ray scattering from synchrotron radiation sources, transmission electron microscopy, and in situ irradiation to discern fundamental mechanisms of corrosion and radiation damage. Prof. Motta is a Fellow of the American Nuclear Society (ANS) and in 2015 he received the Mishima Award from the ANS for outstanding contributions in research and development work on nuclear fuel and materials. In 2016 he was awarded the ASTM William J. Kroll Medal for sustained impactful contributions to zirconium metallurgy including corrosion, hydriding, mechanical properties and irradiation effects.

112 Forbes Field Cir

Hosted by: Lisa Spicer,  Engineering Science and Mechanics  (lms8@psu.edu/814-867-1569)

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