Conferences, Lectures, & Seminars
Events for October
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Aerospace & Mechanical Engineering Department Seminar
Wed, Oct 05, 2011 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Alfredo Caro, Los Alamos National Lab
Talk Title: Engineering Interfaces as a Strategy Towards New Materials for Extreme Irradiation Environments
Abstract: The LANL's Center for Materials under Extreme Mechanical and Irradiation Extremes, one of the DOE's Energy Frontier Research Center, is focused on the study of interfaces and their response to extreme conditions. This talk will cover two aspects of this research: i- radiation resistance of nanoscale foams and ii- radiation resistance of twist boundaries in fcc and bcc metals. Using computational tools and experimental measurements we we explore the behavior of these two systems to unveil details on the evolution of radiation created defects as affected by nanoscale structural features.
Host: Prof. A. Hodge
More Info: http://ame-www.usc.edu/seminars/index.shtml#upcomingLocation: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming
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Hydrodynamic Quantum Analogues: Droplets Walking on the Impossible Pilot Wave
Fri, Oct 07, 2011 @ 02:00 PM - 04:00 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: John W. M. Bush, Professor of Applied Mathematics, Department of Mathematics, Massachusetts Institute of Technology, Cambridge, MA
Talk Title: Hydrodynamic Quantum Analogues: Droplets Walking on the Impossible Pilot Wave - -
Series: Laufer Lecture Series
Abstract: Yves Couder and coworkers have recently reported the results of a startling series of experiments in which droplets walking on a vibrating fluid surface exhibit several dynamical features previously thought to be peculiar to the microscopic realm, including single-particle diffraction and interference, tunneling and quantized orbits. In an attempt to develop a connection between the fluid and quantum systems, we explore the Madelung transformation, whereby Schrödinger's equation is recast in a hydrodynamic form. Doing so allows us to demonstrate that the capillary pressure associated with the fluid's interfacial tension plays the role of the quantum pressure, and that the capillary Faraday waves play the role of de Broglie's matter waves. A surprising correspondence between the walking droplets and de Broglie's pilot wave theory of quantum mechanics is developed. New experiments are presented, and indicate the potential value of this hydrodynamic approach to both visualizing and understanding quantum mechanics.
Biography: John Bush is a Professor of Applied Mathematics at MIT. Having completed his BSc in Physics at University of Toronto, he went on to Harvard for his PhD in Geophysics, then the University of Cambridge for postdoctoral research. In 1998, he joined the faculty of MIT, where he is now the Director of the Applied Mathematics Laboratory. Bush's research began in geophysics, but then shifted towards the effects of surface tension. In the past five years, he has been working primarily in biological fluid mechanics and biomimicry, with a view to rationalizing and exploiting Nature's designs. Most recently, he has been exploring hydrodynamic analogues of quantum systems.
Host: Dr. Spedding
More Info: http://ae-www.usc.edu/seminars/10-7-11-bush.shtmlLocation: Charlotte S. & Davre R. Davidson Continuing Education Conference Center (DCC) - Club Room
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ae-www.usc.edu/seminars/10-7-11-bush.shtml
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AME Department Seminar
Wed, Oct 12, 2011 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Christophe Eloy , Professor of Physics. Aix-Marseille University, France.
Talk Title: Hydrodynamical Constraints on the Shape of Fishes and Trees
Abstract: During this talk, I will address two biomechanical problems of fluid-structure interactions. First, I will examine the relation between the shape of fishes and their performance in the case of undulatory swimming. Then, I will discuss how the resistance to wind-induced stresses constrains the architecture of trees.
Biography: Christophe Eloy is an Assistant Professor in Physics at Aix-Marseille University and at IRPHE in Marseille, France. He is currently a Marie Curie fellow at UC San Diego in the Department of Mechanical and Aerospace Engineering. His research area is mainly Theoretical Fluid Mechanics with specific interests in Rotating Flows, Hydrodynamic Instabilities, Aeroelasticity and Animal Locomotion.
Host: Prof. E. Kanso
More Info: http://ame-www.usc.edu/seminars/index.shtml#upcomingLocation: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming
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AME Department Seminar
Wed, Oct 19, 2011 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Houman Owhadi, Professor of Applied and Computational Mathematics and Control and Dynamical Systems. California Institute of Technology. Pasadena, CA
Talk Title: Homogenization of Wave Equations Non-Separated Scales, High Contrast and Localized Bases
Abstract: We show how to construct localized elliptic cell problems for the homogenization of wave equations with non-separated scales, high-contrast and arbitrary deterministic coefficients. Randomness, scale separation, mixing or "epsilon-sequences" are not required because the proposed method solely relies on the compactness of the solution space. The support of cell problems can be localized to arbitrarily small subsets of the whole domain and explicit approximation error estimates are obtained as a function of the size of those subsets. We show how this work extends to elastodynamics and atomistic to continuum upscaling. Various parts of this talk are joint work with L. Zhang, L. Berlyand, M. Desbrun, M. Federov, M. Desbrun, L. Kharevych and P. Mullen.
Biography: Houman Owhadi received his B.S., Ecole Polytechnique (France), 1994; M.S., Ecole Nationale des Ponts et Chaussees, 1997; Ph.D., Ecole Polytechnique Federale de Lausanne (Switzerland), 2001. He moved to Caltech as Assistant Professor from 2004-11, becoming Professor in 2011. His work focuses on the modeling and analysis of systems characterized by multiple scales, geometric structures, noise and uncertainties. At the center of his work are fundamental problems such as non-separated scales, anomalous diffusion, the geometric integration of multi-scale stochastic mechanical systems and the optimal quantification of uncertainties in presence of limited information.
Host: Prof. E. Kanso
More Info: http://ame-www.usc.edu/seminars/index.shtml#upcomingLocation: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: April Mundy
Event Link: http://ame-www.usc.edu/seminars/index.shtml#upcoming
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Neutron Tomography For Material Characterization
Wed, Oct 26, 2011 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Dayakar Penumadu, red N. Peebles Professor and Head of Joint Institute for Advanced Materials and Chair of Excellence; Civil and Environmental Engineering, University of Tennessee, Knoxville, TN
Talk Title: - -
Abstract: Three dimensional neutron imaging is becoming an increasingly important research tool and a diagnostic technique, providing complementary information to X-ray imaging for a wide range of applications in science and engineering. Using a well collimated neutron beam and lens coupled neutron detector system comprising of a thin scintillator screen, low-noise CCD camera, suitable mirror coupled to a high quality lens system in a light-tight box, varying resolution neutron radiography and tomography images are obtained for target materials and working systems in a controlled sample environment. In this presentation, author will present example results from his research group associated with neutron tomography of metals (steel and aluminum alloys), polymeric composites and sandwich structures, and granular materials under partial saturation. Relevant recent advances associated with energy selective neutron imaging including Bragg-edge imaging and dark-field tomography will also be included. As an example of in-situ diagnostic ability, neutron imaging of a working PEM fuel cell for water management studies will be addressed. The unique ability of neutrons to penetrate high Z materials and have extraordinary contrast to light elements such as hydrogen offers potential for many new applications. To demonstrate the multi-modality of using combined information from X-ray and neutron attenuation through matter, author will use the example results on partially saturated compacted sand sample and polymeric composites subjected accelerated sea environmental degradation conditions. Theses sample were imaged using X-ray (13.2 µm voxel size) and cold neutron (29.8 µm voxel size) tomography using unique imaging facilities at the Helmholtz- Zentrum-Berlin (CONRAD) and thermal neutrons (10 µm voxel size) at National Institute of Standards and Testing (BT2), Gaithersberg. Both imaging modality systems provide relatively large field of view (FOV) and high spatial resolution for engineering applications. High resolution tomography offers unprecedented opportunity to study materials non-invasively for evaluating the microstructure and damage characterization quantitatively in three dimensions. Direct integration of reconstructed images into numerical methods for solving boundary value problems is a promising future direction.
Host: Veronica Eliasson
Location: Seaver Science Library (SSL) - 150
Audiences: Everyone Is Invited
Contact: April Mundy