Conferences, Lectures, & Seminars
Events for February
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AME Seminar
Wed, Feb 03, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Ali Khosronejad, Stony Brook University
Talk Title: Saliva Particle Transport during Cough & Breathing: Insights on Effective Social Distancing & Face Wearing Gained by LES
Abstract: The Coronavirus disease outbreak of 2019 has been causing significant loss of life and unprecedented economical loss throughout the world. Social distancing and face masks are widely recommended around the globe in order to protect others and prevent the spread of the virus through breathing, coughing, and sneezing. To expand the scientific underpinnings of such recommendations, we carry out high-fidelity computational fluid dynamics simulations of unprecedented resolution and realism to elucidate the underlying physics of saliva particulate transport during human cough and normal breathing with and without facial masks. Our simulations: (a) are carried out under both a stagnant ambient flow (indoor) and a mild unidirectional breeze (outdoor) (b) incorporate the effect of human anatomy on the flow (c) account for both medical and non-medical grade masks; and (d) consider a wide spectrum of particulate sizes. We show that during indoor coughing some saliva particulates could travel up to 0.48 m, 0.73 m, and 2.62 m for the cases with medical-grade, non-medical grade, and without facial masks, respectively. Thus, in indoor environments either medical or non-medical grade facial masks can successfully limit the spreading of saliva particulates to others. Under outdoor conditions with a unidirectional mild breeze, however, leakage flow through the mask can cause saliva particulates to be entrained into the energetic shear layers around the body and transported very fast at large distances by the turbulent flow, thus, limiting the effectiveness of facial masks.
Biography: Short Bio:
1995 -“ 99 BS, Hydraulic Engineering, University of Tehran, Tehran, Iran
1999 -“ 2001 MS, Hydraulic Engineering, Sharif University of Technology, Tehran, Iran
2001 -“ 2006 PhD, Hydraulic Engineering, Tarbiat Modarres University, Tehran, Iran
2004 -“ 2005 Research Assistant, University of Ottawa, Canada
2006 -“ 2009 Assis. Prof., University of Guilan, Rasht, Iran
2006 -“ 2009 Senior Engineer, Dam Rehabilitation Dept., Mahab Ghods Consultant, Tehran, Iran
2009 -“ 2016 Post-Doctoral, St. Anthony Falls Lab., University of Minnesota, Mineapolis, MN
2016 -“ Assis. Prof., Civil Engineering Dept., Stony Brook University, Stony Brook, NY
Published over 40 Journal Articles
PI of research grants from NSF, NIH, Austrian NSF, and California Department of Transportation
Co-PI of research grants from DOE and NYSERDA
Host: AME Department
More Info: https://usc.zoom.us/j/99170932320
Webcast: https://usc.zoom.us/j/99170932320Location: Online event
WebCast Link: https://usc.zoom.us/j/99170932320
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/99170932320
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Feb 10, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Gen(ret) Ellen Pawlikowski, USC
Talk Title: Learning From the Past
Abstract: Department of Defense acquisition programs are the means that new capabilities are developed, acquired and fielded to support military operations. These programs can span decades as they often include evolving complex systems of systems. New practitioners (program managers and engineers) tend to get overwhelmed and at the same time discover that the tools to apply such information to their current task are deficient or lacking. In todays world of ever growing complexity and increasingly compressed timelines, there is seldom enough time to gain the depth and breadth of experience needed. This recognition provides the impetus to leverage case studies as an experience accelerator. Case studies provide tools for acquisition practitioners to learn from the experience of those program managers and systems engineers that preceded them. This presentation provides a foundation for conducting and using case studies in systems engineering and management.
Biography: General (retired) Ellen M Pawlikowski is an independent consultant providing expertise on strategic planning, program management, logistics, and research and development. She is the Judge Widney Professor at the Viterbi School of Engineering at the University of Southern California. She serves on the Boards of Directors for the Raytheon Company, Intelsat SA, Applied Research Associates, and SRI International. Ellen Pawlikowski was the third woman to achieve the rank of General in the US Air Force. In her last assignment, she served as Commander, Air Force Materiel Command, Wright-Patterson Air Force Base, Ohio. The command employs some 80,000 people and manages $60 billion annually, providing the Air Force with research and development, life cycle systems management, test and evaluation, installation support, depot maintenance and supply chain management.
She entered the Air Force in 1978 as a distinguished graduate of the ROTC program at the New Jersey Institute of Technology, Newark, NJ. She then attended the University of California at Berkeley as a Fannie and John Hertz Foundation fellow and received a Doctorate in chemical engineering in December 1981.
General Pawlikowski's career has spanned a wide variety of technical management, leadership and staff positions. She commanded five times as a general officer, commanding the MILSATCOM Systems Wing, the AF element of the National Reconnaissance Office, AF Research Laboratory, the Space and Missile Systems Center, and Air force Materiel Command. She also served as the program director and program executive officer for several multibillion dollar military system acquisitions.
General Pawlikowski is nationally recognized for her leadership and technical management acumen. Among her recognitions are the Women In Aerospace Life Time Achievement Award, the NDIA Peter B Teets Award, and the Air Force Association Executive Management Award. She is a Honorary Fellow of the American Institute of Aeronautics and Astronautics, a Fellow of the Directed Energy Professional Society, and a member of the National Academy of Engineers.
Ellen Pawlikowski was born in Bloomfield, NJ and currently resides in Macon, GA.
More Info: https://usc.zoom.us/j/94332388706
Webcast: https://usc.zoom.us/j/94332388706Location: Online event
WebCast Link: https://usc.zoom.us/j/94332388706
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/94332388706
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Advanced Manufacturing Seminar Series
Fri, Feb 12, 2021 @ 10:00 AM - 11:30 AM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Steven Nutt, USC
Talk Title: Aerospace-Grade Composites Without Autoclaves - A New Paradigm for Prepregs
Abstract: Composite parts for aerospace structures have traditionally traveled through the autoclave en route to service. The journey begins when sheets of prepreg (fibers pre-impregnated with polymer resin) are laid onto a contoured tool in specified orientations, then cured by heating. The pressures provided during autoclave cure cycles have ensured consistent yields of low-defect laminates that meet the exacting performance and safety standards of the aerospace industry. The process robustness imparted by the use of autoclaves has fostered confidence amongst engineers, greatly expanding the deployment of composite materials. Examples of the widespread use include the 787 and A350 all-composite aircraft, as well as military aircraft and space vehicles. However, expanded use has created demand for increased production rates, and thus engineers have sought ways to bypass autoclaves, albeit without sacrificing material quality. The search has spawned the advent of vacuum-bag-only (VBO) prepregs designed to be cured in conventional ovens, which in principle should accelerate production throughput and reduce costs. In this seminar, basic principles involved in the design, use, and production of VBO prepregs will be presented, as well as perspectives on opportunities for future developments.
Biography: Prof. Nutt is the M.C. Gill Professor and founding director of the M.C. Gill Composites Center at the University of Southern California (USC). He joined USC in 1994, and his group focuses on understanding physical and chemical processes occurring during the manufacture of composite materials.
Host: Center for Advanced Manufacturing
More Info: Please register for this webinar at: https://usc.zoom.us/webinar/register/WN_ZxgMTiUmR6qUWLVuvT-HLg
More Information: Adv Mfg Seminar S21_Steven Nutt.pdf
Location: Online event
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: Please register for this webinar at: https://usc.zoom.us/webinar/register/WN_ZxgMTiUmR6qUWLVuvT-HLg
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Feb 17, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Ian Tobasco, Univ. Illinois Chicago
Talk Title: Simple Rules for the Wrinkle Patterns of Confined Elastic Shells
Abstract: Dried fruits wrinkle for the same reason that leaves and flowers do -” mechanical instabilities arising from a mismatch in lengths. Can such geometric incompatibilities be used to design and control wrinkle patterns at will? This talk will discuss the possibility of designing wrinkle patterns in the large using a recently derived model for the wrinkles of confined elastic shells. After recalling the basic mechanics and introducing our model, we show how it can be solved by hand in many cases to predict the wrinkled topography. Solving this model produces a few geometric rules, which explain the layout of the wrinkle peaks and troughs across examples. These simple rules reproduce the patterns seen in numerous experiments and simulations, even ones that exhibit a surprising coexistence between orderly wrinkles and a more disordered response. Knowing such rules for wrinkles opens the way towards designer wrinkle patterns, with potential applications from flexible electronics to synthetic skins.
Biography: Ian Tobasco is an Assistant Professor at the University of Illinois at Chicago Department of Mathematics, Statistics, and Computer Science. He holds a Ph.D. in Mathematics from the Courant Institute of Mathematical Sciences at New York University, and a B.S.E. in Aerospace Engineering from the University of Michigan.
His research on the calculus of variations and partial differential equations concerns problems that sit at the interface of mathematics, physics, and engineering, where advances in pure mathematical analysis can lead to scientific breakthroughs in the lab and vice versa. His recent work involves the use of energy minimization to explain and classify the zoo of wrinkling, crumpling, and folding patterns exhibited by thin elastic sheets. Other interests include the design of optimal transport mechanisms in fluid dynamics and their comparison with naturally occurring turbulent transport, as well as the variational analysis of spin glasses.
Host: AME Department
More Info: https://usc.zoom.us/j/97445099108
Webcast: https://usc.zoom.us/j/97445099108Location: Online event
WebCast Link: https://usc.zoom.us/j/97445099108
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/97445099108
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME PhD Student Seminar
Fri, Feb 19, 2021 @ 03:00 PM - 04:00 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Raye Xie, USC AME PhD Student
Talk Title: Development and Validation of a Body-Force Propulsor
Abstract: This talk introduces a body-force propulsor model that replaces the engine blades with a source volume in CFD to produce the equivalent flow turning, work input, and losses. The motivation for developing this model is to capture the effects of inlet flow non-uniformity on propulsor performance, while using a local formulation appropriate for full-aircraft CFD at a computational cost compatible with design studies. The model is able to capture non-axisymmetric effects and only requires specification of the blade camber and thickness distributions. An inviscid formulation for the body-force was previously found to be capable of predicting the inviscid distortion transfer effects, but losses and blade metal blockage effects were not accounted for. An improved formulation with a blockage component is proposed here and is shown to properly predict the propulsor work. Loss terms are included to model 2D profile losses and secondary flow losses. The proposed model is implemented in the flow solver ADflow and validated against NASA rotor 67 experimental data.
Biography: Tianbo (Raye) is a PhD student supervised by Dr. Alejandra Uranga. His research focuses on engine/propulsor modeling in high-fidelity simulations and full-aircraft simulations. Raye has a B.S. from Rensselaer Polytechnic Institute, and a M.S. from USC.
Host: AME Department
More Info: https://usc.zoom.us/j/96549200347?pwd=Uytmd05JbE5qQnRzeEpDSVBXL2ZFZz09
Audiences: Everyone Is Invited
Contact: Christine Franks
Event Link: https://usc.zoom.us/j/96549200347?pwd=Uytmd05JbE5qQnRzeEpDSVBXL2ZFZz09
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
AME Seminar
Wed, Feb 24, 2021 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Giovanna Bucci, Bosch
Talk Title: Mesoscale Modeling for Next Generation DNA Sequencing and Sustainable Energy
Abstract: There is great potential for genome sequencing to enhance patient care through improved diagnostic sensitivity and more precise therapeutic targeting. The opportunity to detect repetitive regions and structural variation in the genome has incentivized the development of long-read DNA sequencing. Nano-channel analysis is one of the emerging strategies for non-optical DNA sequencing. However, high cost, low throughput, and low accuracy have so far limited the adoption of long-read technologies. In this work, mesoscale modeling tools are employed to simulate the mechanics of DNA loading and reading, and predict the statistics of polymer-chain conformation under confinement. A workflow was developed to quantify competing requirements of efficiency and accuracy and extract metrics that guide design optimization. Several design variables (geometry, electric field, materials and interfaces, buffer solution, etc.) can be tuned to achieve high throughput base-pair detection. This multi-dimensional design space offers a great opportunity for modeling to provide understanding and accelerate innovation.
Finally, I will provide an overview of my recent work in energy storage/conversion technologies, with a brief discussion of a new theoretical and computational framework to study electrochemical instability and coarsening of catalyst nano-particles.
Biography: Giovanna Bucci is a Senior Research Engineer in the Energy Technologies Division at Bosch, where she has been responsible for the mesoscale modeling of aging in Li-ion batteries and in proton exchange membrane fuel cells. Currently, she leads a modeling effort to optimize the design of a DNA sequencing device based on nano-confinement.
Giovanna began her career in the field of computational solid mechanics, with an emphasis on fracture and large-scale simulation. She worked on next-generation energy storage devices, with postdocs at Brown University and in the Carter/Chiang research group at MIT DMSE. Her analyses have established design rules for silicon anodes, and identified failure-tolerant battery microstructures and operating conditions. In recognition of her cross-disciplinary accomplishments, she received the 2015 Rising Stars in Nuclear Science and Engineering award at MIT.
Giovanna took her Ph.D. in Structural Mechanics from the Politecnico di Milano and her M.S. and B.S. in Architecture from Università di Pavia.
Host: AME Department
More Info: https://usc.zoom.us/j/95442736433
Webcast: https://usc.zoom.us/j/95442736433Location: Online event
WebCast Link: https://usc.zoom.us/j/95442736433
Audiences: Everyone Is Invited
Contact: Tessa Yao
Event Link: https://usc.zoom.us/j/95442736433
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.
