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Events for April 27, 2011
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Meet USC: Admission Presentation, Campus Tour, & Engineering TalkWed, Apr 27, 2011
Viterbi School of Engineering Undergraduate Admission
Receptions & Special Events
This half day program is designed for prospective freshmen and family members. Meet USC includes an information session on the University and the Admission process; a student led walking tour of campus and a meeting with us in the Viterbi School. Meet USC is designed to answer all of your questions about USC, the application process and financial aid.Reservations are required for Meet USC. This program occurs twice, once at 8:30 a.m. and again at 12:30 p.m. Please visit http://usconnect.usc.edu/ to check availability and make an appointment. Be sure to list an Engineering major as your "intended major" on the webform!
Location: USC Admission Center
Audiences: Everyone Is Invited
Contact: Viterbi Admission
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Threat and Error Management Development (TEM)
Wed, Apr 27, 2011 @ 08:00 AM - 04:00 PM
Aviation Safety and Security Program
University Calendar
Threat and Error Management Development is being implemented by operators throughout the world. This course is designed to train those who wish to develop a TEM program within their own organizations. Taught by a leader in TEM development, this course provides an applied, practical approach to explaining TEM principles.
Location: Aviation Safety & Security Campus
Audiences: Aviation Professionals
Contact: Harrison Wolf
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Petroleum Engineering Seminar
Wed, Apr 27, 2011 @ 12:45 PM - 01:30 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Dr. Mohammad Piri, University of Wyoming, Dept. of Chemical & Petroleum Engineering
Talk Title: Multiphase Flow Properties in Mixed-Wet Porous Media:
Abstract: Development decisions for hydrocarbon fields or CO2 storage sites are based on reservoir performance predictions under different putative development strategies. These predictions use numerical simulation of multiphase fluid flow through a geological description of the reservoir. Much attention has been given to the assignment of properties - such as porosity and permeability - that faithfully represent the expected spatial heterogeneity and are consistent with a variety of different measurements of reservoir properties. In comparison, multiphase properties, particularly relative permeability, are given less attention, and a single set of relative permeabilities is often assigned to a given rock type, or even to the whole field. For many improved/enhanced hydrocarbon recovery projects and CO2 sequestration schemes, accurate estimates of relative permeabilities are crucial. The uncertainties associated with assigning multiphase flow properties often mean that the development projects are not carried out, with lost opportunity costs that may be hundreds of millions of dollars for a single field. This problem is even more acute for recovery of hydrocarbons from unconventional resources such as tight gas reservoirs.
In recent years there has been a surge in interest in pore-scale modeling as a physically-based tool to predict macroscopic properties such as relative permeabilities. The displacement physics for two- and three-phase flow in mixed-wet porous systems has been worked out at the pore scale. In this seminar, two distinct groups of state-of-the-art physically-based pore-level models will be presented: 1) A three-dimensional random network model will be discussed that is capable of simulating two- and three-phase flow processes at the pore level using faithful representations of the pore space. The displacement mechanisms incorporated in the model are based on the physics of multiphase flow observed in micromodel experiments. The model computes relative permeabilities, saturation paths, and capillary pressures for a variety of displacement sequences. The predicted two- and three-phase relative permeabilities are successfully compared against their experimental counterparts. Other applications of the technique, for instance, in fractured systems, will also be discussed. 2) A dynamic particle-based model for direct pore-level simulation of incompressible flow and contaminant transport in disordered porous media will be presented. The model is capable of simulating flow directly in three-dimensional high-resolution microtomography images of rock samples. The model is based on moving particle semi-implicit (MPS) method and is used to predict various flow and transport properties such as longitudinal dispersion coefficient. The accuracy of the model is validated against analytical, numerical, and experimental data available in the literature. The validated model is then used to simulate both unsteady- and steady-state flow and transport directly in representative elementary volume (REV) size microtomography images of naturally-occurring porous systems.
The need for better experimental measurements in order to improve the predictive capabilities of the aforementioned models will be discussed next. A state-of-the-art three-phase flow laboratory, established from scratch at the University of Wyoming, will be presented. The facility can be used to study a wide range of two- and three-phase flow experiments at reservoir conditions using a medical CT scanner to measure in-situ fluid saturations. The experiments may be carried out using vertically-placed core samples as the scanner can be rotated to the horizontal orientation. An extensive experimental program designed to complement the modeling effort will be discussed. Recently generated experimental data on the permanent trapping of supercritical CO2, relevant to CO2 sequestration in deep saline aquifers, and results related to a novel EOR technique will be presented.
Biography: Dr. Mohammad Piri is an Assistant Professor of Petroleum Engineering at the University of Wyoming (UW). He received his PhD in Petroleum Engineering at Imperial College London in 2004. Before joining the faculty at UW, he worked as a postdoctoral research associate in the Department of Civil and Environmental Engineering at Princeton University. His research interests include pore-level physics of multiphase flow and transport in disordered porous media with applications in energy and the environment as well as measurement and prediction of macroscopic properties in multiphase flow systems. In particular, he works on three-phase flow systems with applications to oil and gas recovery, CO2 sequestration and leakage, effects of saturation history, trapping, and wettability on three-phase relative permeability, and direct pore-level modeling of flow in microtomography images. He currently leads a research group with seven graduate students and one postdoctoral research associate and is the Associate Director of the Center for Fundamentals of Subsurface Flow of the School of Energy Resources at UW.
Host: Mork Family Department
Location: Hedco Pertroleum and Chemical Engineering Building (HED) -
Audiences: Everyone Is Invited
Contact: Takimoto Idania
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Epstein ISE Seminar
Wed, Apr 27, 2011 @ 02:30 PM - 03:30 PM
Daniel J. Epstein Department of Industrial and Systems Engineering
Conferences, Lectures, & Seminars
Speaker: Dennice Gayme, Postdoctoral Scholar, Control and Dynamical Systems, California Institute of Technology
Talk Title: "Grid Integration of Renewable Energy Sources"
Abstract: Global warming and security concerns are driving the need to find more efficient and renewable energy sources and systems. In this talk we examine issues associated with integrating renewable sources into a smart electric grid. Two case studies are described. The first demonstrates the benefits of grid integrated storage in the current power generation network paradigm. The second looks at how a combination of storage and ancillary services can be used to mitigate the intermittency of renewable sources. These studies are used to demonstrate the different trade-offs necessary in developing a system that effectively integrates renewable resources. A full characterization of energy systems that combine a variety of generation schemes, storage and ancillary services is required before the full potential of a âsmartâ and clean power generation system can be achieved.
Location: Ethel Percy Andrus Gerontology Center (GER) - Room 309
Audiences: Everyone Is Invited
Contact: Georgia Lum
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AME Department Seminar
Wed, Apr 27, 2011 @ 03:30 PM - 04:30 PM
Aerospace and Mechanical Engineering
Conferences, Lectures, & Seminars
Speaker: Bill Henshaw, Centre for Applied Scientific Computing, Lawrence Livermore National Laboratory
Talk Title: Deforming Composite Grids for Fluid Structure Interactions
Abstract: For some years we have been developing an open source software framework called Overture for the solution of partial differential equations in complex moving geometry. We use overlapping grids (also know as overset or Chimera grids) to efficiently represent complex geometry with structured grids. I will begin this talk by giving a brief overview of Overture and its capabilities. The focus of the talk will be on our recent work for fluid structure interaction problems. I will describe the use of deforming composite overlapping grids for the solution of problems coupling fluid flow and deforming solids. The method is based on a mixed Eulerian Lagrangian technique. Local moving boundary-fitted grids are used near the deforming interface and these overlap non-moving grids which cover the majority of the domain. The approach is described and validated for some fluid structure problems involving high speed compressible flow and linear elastic solids.
Host: Prof. V. Eliasson
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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CS Colloquium
Wed, Apr 27, 2011 @ 03:30 PM - 05:00 PM
Thomas Lord Department of Computer Science
Conferences, Lectures, & Seminars
Speaker: Prof. Yevgeniy Dodis, NYU
Talk Title: Leftover Hash Lemma, Revisited
Abstract: The famous Leftover Hash Lemma (LHL) states that (almost) universal hash functions are good randomness extractors. Despite its numerous applications, LHL-based extractors suffer from the following two drawbacks:
(1) Large Entropy Loss: to extract v bits from distribution X of min-entropy m which are e-close to uniform, one must set v = 2*log(1/e).
(2) Large Seed Length: the seed length n of universal hash function required by the LHL must be linear in the length of the source.
Quite surprisingly, we show that both limitations of the LHL --- large entropy loss and large seed --- can often be overcome (or, at least,
mitigated) in various quite general scenarios. First, we show that entropy loss could be reduced to L=log(1/e) for the setting of deriving secret keys for a wide range of cryptographic applications, including *all* "unpredictability" applications (signatures, MACs, etc.) and also some prominent "indistinguishability" applications, including chosen plaintext (or ciphertext) attack secure (public- or symmetric-key) encryption schemes. Specifically, the security of these schemes gracefully degrades from e to at most e + sqrt(e * 2^{-L}).(Notice that, unlike standard LHL, this bound is meaningful even for negative entropy loss, when we extract more bits than the the min-entropy we have!)
Second, we study the soundness of the natural *expand-then-extract* approach, where one uses a pseudorandom generator (PRG) to expand a short "input seed" S into a longer "output seed" S', and then use the resulting S' as the seed required by the LHL (or, more generally, any randomness extractor). Unfortunately, we show that, in general, expand-then-extract approach is not sound if the Decisional Diffie-Hellman assumption is true. Despite that, we show that it is sound either: (1) when extracting a "small" (logarithmic in the security of the PRG) number of bits; or (2) in *minicrypt*.
Implication (2) suggests that the sample-then-extract approach is likely secure when used with "practical" PRGs, despite lacking a reductionist proof of security!
The paper can be found at http://eprint.iacr.org/2011/088
Biography: Yevgeniy Dodis is an Associate Professor of computer science at New York University, which he joined in 2001 after receiving his PhD at MIT in 2000 and being a post-doc at IBM T.J.Watson Research center.
He also spent 2007-2008 academic year visiting the CRCS center at Harvard University.
Dr. Dodis' research is primarily in cryptography and network security.
In particular, he worked in a variety of areas including leakage-resilient cryptography, cryptography under weak randomness, cryptography with biometrics and other noisy data, hash function and block cipher design, protocol composition and information-theoretic cryptography. Dr. Dodis has more than 90 scientific publications at various conferences, journals and other venues, has been on program committees of many international conferences (including FOCS, STOC, CRYPTO and Eurocrypt), and gave numerous invited lectures and courses at various venues. Dr. Dodis is the recipient of National Science Foundation CAREER Award, IBM Faculty Award, Google Faculty Award and Best Paper Award at 2005 Public Key Cryptography Conference. As an undergraduate student, he was also a winner of the US-Canada Putnam Mathematical Competition in 1995.
Host: Prof. David Kempe
Location: Grace Ford Salvatori Hall Of Letters, Arts & Sciences (GFS) - 118
Audiences: Everyone Is Invited
Contact: Kanak Agrawal
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Tau Beta Pi Engineering Futures
Wed, Apr 27, 2011 @ 06:30 PM - 07:30 PM
Viterbi School of Engineering Student Organizations
Student Activity
This is a 2 point leadership development workshop
organized by the National HQ to give advice on analytical problem
solving--this is a great event for Seniors who need points for a stole as graduation is a month away (almost)! Panda Express will be
provided. Location TBA.Audiences: Everyone Is Invited
Contact: Tau Beta Pi
