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Archived Seminars
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| ARD Archived Seminars
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Eaux, Strates et Horizons
The Department of Architecture & Design and the Landscape Design & Eco-Management Program at FAFS
cordially invite you to a public lecture by:
Olivier Philippe
entitled:
Eaux, Strates et Horizons
Date:Wednesday March 15, 2006
Time:6:30pm
Place: Architecture Lecture Hall [ALH]
Date: 3/15/2006
Time: 12:00 AM
Place: unspecified
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D`cadence: Extreme makeover a television reality
The Department of Architecture and Design
at the American University of Beirut
cordially invites you to
a lecture by: Obeida Sidani
entitled: "D'cadence: Extreme makeover a television reality"
Date: Wednesday April 12, 2006
Time: 6:30pm
Place: ALH [Architecture Lecture Hall]
Date: 4/12/2006
Time: 12:00 AM
Place: unspecified
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Estonian National Museum: Memories Field, by Lina Ghotmeh
A Wide Cut in the landscape, a "Runway", a "landing", a long stretch of reconstructed land tending towards an "Infinite space"... an intriguing space only revealed in plan as a dismantled war airfield. An element that testifies of a long struggle with occupation, a rich historical construction, a memory landscape, a strip of space that goes beyond its physicality to be embedded with the meanings of Estonian culture.
A memory landscape, a unique urban element approaching 'our' site, a space that cannot be ignored or left without being appropriated, without exploiting its potential in reconstructing 'our' urban memory/experience. But how can the same element that once led to the degeneration of the east part of this city become the tool of its regeneration and transformation? Can the contradiction and struggle between two 'cultures' continue to be at the heart of the production of "New Unique Spaces"? How can the production of one space [the museum] use and appropriate the memor
Date: 1/5/2007
Time: 6:30 PM
Place: Architecture Lecture Hall (ALH)
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Silkscreen Exhibition, A Portrayal of The Beiruti Street
The Graphic Design class of 2007 invites you to silkscreen exhibition, A Portrayal of The Beiruti Street.
Opening Monday January 15, 2007 at 6:30pm. Exhibition will remain open till Friday January 19, 2007 from 10:00am to
4:00pm.
Date: 1/15/2007
Time: 6:30 PM
Place: Department of Architecture and Design, Exhibition Space, 2nd floor.
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Silkscreen Exhibition, A Portrayal of The Beiruti Street
The Graphic Design class of 2007 invites you to silkscreen exhibition, A Portrayal of The Beiruti Street.
Opening Monday January 15, 2007 at 6:30pm. Exhibition will remain open till Friday January 19, 2007 from 10:00am to
4:00pm.
Date: 1/15/2007
Time: 6:30 PM
Place: Department of Architecture and Design, Exhibition Space, 2nd floor.
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The Extra-disciplinary
Stephen Wright is an 'art writer' and research fellow at the Institute National d'Histoire de l'Art (Paris). He has curated "Data esthetics" (WHW, Zagreb), "Rumor as Media" (Aksanat, Istanbul), "In Absentia" (Passerelle, Brest) and "The Future of the Reciprocal Readymade" (Apexart, NYC), as part of a series of exhibitions examining art practices with low coefficients of artistic visibility, which raise the prospect of art without artworks, authorship or spectatorship.
Date: 3/19/2007
Time: 6:30 PM
Place: Architecture Lecture Hall (ALH)
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Architecture , Landscape Architecture and Urban Design: Three disciplines,
Professor Dipl.-Ing. Hans H. Kienle is a Landscape Architect and Architect based in Stuttgart, Germany. He founded and heads Kienle Planungsgesellschaft Freiraum und Städtebau, which offers architecture, landscape architecture and urban design consultancies ...
Date: 4/11/2007
Time: 6:30 PM
Place: Architecture Lectrue Hall (ALH)
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Sustainable Landscape Design: Selected Case Studies
Professor Dipl.-Ing. Hans H. Kienle is a Landscape Architect and Architect based in Stuttgart, Germany. He founded and heads Kienle Planungsgesellschaft Freiraum und Städtebau, which offers architecture, landscape architecture and urban design consultancies ...
Date: 4/16/2007
Time: 6:30 PM
Place: FAFS Auditorium (Room 102)
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Public Lecture
Landscape Architecture, Architecture & Urban Design. Three disciplines, One concept. "The Zhenhai Project" by Hans Kienle
Date: 4/11/2007
Time: 6:30 pm
Place: Architecture Lecture Hall (ALH)
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Gnomingo! Into the great wide open
The Department of Architecture and Design is pleased to announce the first event of its Lecture Series by By Michel de Boer, Partner at Studio Dumbar, Amsterdam.
Works of Studio Dumbar will be on exhibit. An opening will take place before the lecture @ 5.30pm
Date: 10/26/2007
Time: 6:30 PM
Place: Architecture Lecture Hall
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Urban Practices & Public Space: Weaving their Ways through Fragmentation, Identity & Politics
The Middle East Office of the Heinrich Boell Foundation & aMAZElab Milan/Italy cordially invite you to a seminar within the Project Communities & Territories On Public Sphere & Public Libraries titled "Urban Practices & Public Space: Weaving their Ways through Fragmentation, Identity and Politics" at the Department of Architecture and Design; Dar Al-Handassah [Shair and Partners] Architecture Building.
Date: 11/17/2007
Time: 9:00 AM - 6:30 PM
Place: Department of Architecture and Design; Dar Al-Handassah [Shair and Partners] Architecture Building.
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Consuming Heritage or the End of Tradition, By Nezar Al-Sayyad
Nezar AlSayyad is an architect, a planner, an urban designer and an urban historian. He is a Professor of Architecture and Planning at the university of California at Berkeley were he serves as the Associate Dean for the College of Environmental Design and Chair of the University’s Center for Middle Eastern Studies (CMES) at Berkeley. Professionally, AlSayyad has an active practice in the Middle East and the US and is the Principal in XXA-Office of Xross-Cultural Architecture, an urban design and architectural firm with several award-winning credits in its portfolio.
Date: 12/14/2007
Time: 6:30 PM
Place: Architecture Lecture Hall (ALH)
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| CEE Archived Seminars |
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Geo-Earthquake Engineering:Research Interests and Tracks
American University of Beirut
Faculty of Engineering and Architecture
The Department of Civil & Environmental Eng’g
cordially invites you to a seminar on
Geo-Earthquake Engineering:
Research Interests and Tracks
By
Dr. Salah Sadek
Associate Professor, Geotechnical Engineering, AUB
Date:Thursday March 23, 2006
Time:1:00 p.m.
Place:Architecture Lecture Hall (ALH), FEA, AUB.
Date: 3/23/2006
Time: 12:00 AM
Place: unspecified %>
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Managing Safety in the Construction Industry
American University of Beirut
Faculty of Engineering and Architecture
The Department of Civil & Environmental Eng’g
cordially invites you to a seminar on
Managing Safety in the Construction Industry
By
Dr. Fadi Hamdan(Consultant [Structural & Earthquake Engg - Health & Safety, Fires & Explosions]
Lecturer [AUB, NDU, LAU])
Date: Thursday April 20, 2006
Time: 1:00 p.m.
Place: Architecture Lecture Hall (ALH), FEA, AUB.
Date: 4/20/2006
Time: 12:00 AM
Place: unspecified %>
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Numerical and Experimental Investigation of Flow and Transport in the Environment
American University of Beirut
Faculty of Engineering and Architecture
The Department of Civil & Environmental Eng’g
cordially invites you to a seminar on:
Numerical and Experimental Investigation of Flow and Transport in the Environment
By
Dr. Elie Bou-Zeid
Post-Doctoral Researcher – Swiss Federal Institute of Technology at Lausanne
&
Candidate for Environmental Science/Technology at CEE Department, AUB
Date: Friday April 28, 2006
Time: 9:00AM
Place: Engineering Lecture Hall (ELH), FEA
Date: 4/28/2006
Time: 12:00 AM
Place: unspecified %>
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Maritime Transport in Lebanon
American University of Beirut
Faculty of Engineering and Architecture
The Transportation Research Unit (TRU) &
The Department of Civil & Environmental Eng’g
cordially invite you to a seminar on
Maritime Transport in Lebanon: Policies, Ports Development, and Role of the Private Sector
By
Mr. Ammar Kanaan
CEO, Beirut Container Terminal Consortium SAL
President, International Port Management SA
Date: Thursday May 4, 2006
Time: 1:00 p.m.
Place: Architecture Lecture Hall (ALH), FEA, AUB.
Date: 5/4/2006
Time: 12:00 AM
Place: unspecified %>
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Simulation Tools for Infrastructure Monitoring and Management
American University of Beirut
Faculty of Engineering and Architecture
The Department of Civil & Environmental Eng’g
cordially invites you to a seminar on:
Simulation Tools for Infrastructure Monitoring and Management
By:
Dr. George Turkiyyah
Associate Professor, Structural Engineering & Mechanics, U of Washington, Seattle
Visiting Faculty, Computer Science, AUB
Date: Thursday May 11, 2006
Time: 1:00 p.m.
Place: Architecture Lecture Hall (ALH), FEA, AUB.
Date: 5/11/2006
Time: 12:00 AM
Place: unspecified %>
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| ECE Archived Seminars |
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Seminar 1
Date: 11/25/2005
Time: 12:00 AM
Place: unspecified %>
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Seminar 2
Date: 11/22/2005
Time: 12:00 AM
Place: unspecified %>
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Seminar 3
Date: 11/22/2005
Time: 12:00 AM
Place: unspecified %>
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Seminar 4
Date: 11/22/2005
Time: 12:00 AM
Place: unspecified %>
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MICROTECHNOLOGIES FOR OXIDATIVE ENVIRONMENTS IN
AMERICAN UNIVERSITY OF BEIRUT
FACULTY OF ENGINEERING AND ARCHITECTURE
Cordially invites you for a Seminar By:
DR. MICHEL MAHARBIZ
ASSISTANT PROFESSOR OF ELECTRICAL ENGINEERING
UNIVERSITY OF MICHIGAN, ANN ARBOR
ALL ARE WELCOME
DATE : Friday, January 27th
TIME : 3:00 PM
PLACE : Engineering Lecture Hall (ELH)
Date: 1/27/2006
Time: 12:00 AM
Place: unspecified %>
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Engineering Challenges in Neuroscience
AMERICAN UNIVERSITY OF BEIRUT, Electrical and Computer Engineering Department cordially invites you to a seminar by Dr. Fadi Karameh entitled: 'Engineering Challenges in Neuroscience'.
Date: March 14, 2006
Time: 5:00 pm.
Place: EBR(Engineering Board Room)
Date: 3/14/2006
Time: 12:00 AM
Place: unspecified %>
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Diamond tools for working lithoid materials
FACULTY OF ENGINEERING AND ARCHITECTURE
CORDIALLY INVITES YOU TO A SEMINAR
SPEAKER: Dr. Aldo Valle, MG Diamond Tools, Lebanon
Title: “Diamond tools for working lithoid materials”
Date: Wednesday April 12, 2006
Time: 6:00 PM
Place: RCR (Engineering Board Room)
Date: 4/12/2006
Time: 12:00 AM
Place: unspecified %>
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Nokia: Global and Local Strategy
AMERICAN UNIVERSITY OF BEIRUT
FACULTY OF ENGINEERING AND ARCHITECTURE
Electrical and Computer Engineering Department
CORDIALLY INVITES YOU TO A SEMINAR (EECE 797)
Speaker: Dr. Walid Moneimne
Senior Vice President, Nokia Networks
Date: Thursday, May 4th, 2006
Time: 6:30 p.m
Place: ELH
Date: 5/4/2006
Time: 12:00 AM
Place: unspecified %>
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From Multimedia SCORM to Multimedia Reference Architecture
Nowadays, several commercial Learning Management Systems (LMS) exist on the market. Their design and implementation are mainly focusing on the functional requirements rather than the non functional properties. Therefore, this will result in a poor software quality learning technology system and the problems that will occur are usually related to the usability, interoperability, and reusability levels. Additionally, the Architecture and Reference model standards for learning technology systems to remedy these issues are still under development. In this talk, the key design is the quality of LMS that can be achieved through layered-component architecture. This reference architecture with multimedia support will be
based in IEEE standards, SCORM standard, the software development framework RUP (Rational Unified Process), MSCORM, MPEG-4, MPEG-7, and other research done in this field.
Date: 4/19/2007
Time: 12:30 PM
Place: Engineering Board Room %>
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| ME Archived Seminars |
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MEMS DEVICES FOR FORCE SENSING IN BIOLOGY
AMERICAN UNIVERSITY OF BEIRUT
FACULTY OF ENGINEERING AND ARCHITECTURE
Cordially invites you for a Seminar By:
DR. THOMAS KENNY
PROFESSOR OF MECHANICAL ENGINEERING
STANFORD UNIVERSITY
ALL ARE WELCOME
DATE : Friday, January 27th
TIME : 2:00 PM
PLACE : Engineering Lecture Hall (ELH)
Date: 1/27/2006
Time: 12:00 AM
Place: unspecified %>
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Micro-end milling and thermally-assisted manufacturing
Faculty of Engineering and Architecture(FEA)
Mechanical Engineering Department and ASME
cordially invite you to attend a seminar by:
Dr. Frank Pfefferkorn ,University of Wisconsin-Madison
Date: March 13, 2006
Time:03:30 pm
Place:Room 539
Date: 3/13/2006
Time: 12:00 AM
Place: unspecified %>
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"Data Fusion Between Inertial Sensors & Visual Information Applied On"
Rapid advances in control theories, computing abilities, communications, and sensing technology offer a great tool for the unmanned aerial vehicles technology in military and civil applications such as bridge inspection or traffic surveillance....
Date: 11/28/2006
Time: 4:00 PM
Place: Engineering Board Room (EBR) %>
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Millimeter-wave Radar Components
This research aims to develop plastic millimeter-wave components, including waveguides, tunable filters, phase shifters and antennas, toward the low-cost, batch fabrication for integrated systems for applications such as all-weather automotive and airplane landing radars. The key micromachining processes developed in this work include micro hot embossing, electroplating, polishing and bonding and as a proof of concept demonstration, micro injection molding of a plastic microneedle is also presented...
Date: 4/12/2007
Time: 12:30 PM
Place: Engineering Conference Room 503 %>
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13C POLARIZER AUTOMATION STORY
The C13 Polarizer project is a pioneering medical application to allow MR imaging and differentiation between malignant and cancerous cells and tissues in the very early stage of development. The Polarizer is a medical device that dynamically enhances the magnetic polarization of a sterile pharmaceutical agent (Pyruvate Acid) that is laden with 13C atom. The agent is placed in a 3.35 Tesla Magnet and under a 1.2K temperature where it hyperpolarizes with the help of a microwave source. Solid State polarization is measured throughout polarization and when appropriate level is reached, the Pyruvate is compounded with a buffer solution that is super heated and under 250 psi of pressure. The solution is then ejected out and QC system is applied to determine its efficacy before being injected into a patient within 1 minute of dissolution. In this seminar, I would like to talk about the role of Mechanical Automation in making this happen.
Date: 5/10/2007
Time: 12:30 PM
Place: Bechtel Room 503 %>
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A North Indian City: Jaipur, Religion & the Principles of Tolerance
Catherine B. Asher, Associate Professor in the Department of Art History at the University of Minnesota, is a specialist in Islamic Art and Indian Art
from 1200 to the present. She is well known for her work on the architecture of the Mughal dynasty, as well as on the artistic patronage of Mughal successors and predecessors. Her current research includes the comparative study of Hindu, Jain and Muslim patronage particularly in the
cities of Delhi and Jaipur. Her recent teaching has included graduate seminars on the Arts of Islam; the Age of Empire: Ottomans, Safavids and Mughals; the Art of Islamic Iran; and A Diversity of Traditions: Indian Art, 1200 to the Present.
Asher has just completed a term as the College Art Association's Vice
President for Publications, as well as a ten-year term as the Chair of the
Committee on Art and Archaeology of the American Institute of Indian
Studies.
Date: 5/11/2007
Time: 6:30 PM
Place: Architecture Lecture Hall (ALH) %>
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CLOSED-FORM VAN DER WAALS CRITICAL POINT FOR PETROLEUM RESERVOIR FLUIDS
By Talal H Hassoun.
The prediction of critical points is of great practical importance because the classification of petroleum reservoir fluids as a dry gas, gas condensate, volatile oil, and crude oil depends largely on the knowledge of the critical properties of the reservoir fluid. Also, the critical pressure and critical temperature of reservoir fluids are important properties for describing the reservoir fluid phase behavior, predicting volumetric properties of reservoir fluids and designing supercritical fluid processes.
Previous work for determining critical pressure, and critical temperature for reservoir fluids include, empirical correlations, corresponding states method, and pseudo-critical property methods. The generality of these previous correlations is limited to the range of conditions and parameters used in the establishment of the correlations. Methods based on the Gibbs criteria have also been used with Redlich-Kwong and Peng-Robinson equations for predi
Date: 4/14/2008
Time: 4:30 PM
Place: Room 539 Bechtel Bldg %>
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Cable-Robot Based Hardware-in-the-Loop Simulation of Microgravity Contact Dynamics
By Dr.Xiumen Diao.
In this presentation, I am going to give you a brief introduction to cable robots first. Then I will talk about the motivation of this research and explain the new concept of using cable robots for hardware-in-the-loop
(HIL) simulation of microgravity contact dynamics. I will also show you some research results of cable robots. After that, I will introduce two of my projects briefly. One is cable-robot based active suspension system and another is the identification of contact dynamics model parameters. At the end, I will summarize the presentation.
Date: 4/11/2008
Time: From 3:00 to 4:00 PM
Place: ACC Web Conference Room-College Hall %>
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Design of a Robot Manipulator and an Ultrasound Probe Holder for Medical Applications
By Dr. Basem Yousef.
"Robot-assisted procedures for surgery and therapy have received considerable attention and are often preferred over conventional, manually performed procedures because of a robots’ ability to perform consistent precise movements free of fatigue and tremor, and carry out surgical procedures with high dexterity and accuracy beyond those of a surgeon.
In this seminar, I will explain how to incorporate minimally invasive robotic technology for the direct permanent implantation of radioactive (brachytherapy) seeds into prostate tumors. The design and development of a dexterous robotic arm of a sophisticated joint architecture that can be used for holding and manipulating different kinds of surgical tools or micro robots will be described. Also, I will present an ultrasound probe holder that enables registering a medical image to the patient for use in robot-assisted prostate brachytherapy procedures".
Date: 4/18/2008
Time: 3:00 PM
Place: ACC Web Conference Room -College Hall %>
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THESIS DEFENSE
On "Q-SWITCHED YTTERBIUM FIBER LASER MICRO-DRILLING OF SILICON AND ALUMINUM SUBSTRATES".
By Habib Abou Saleh
Date: 6/4/2008
Time: 3:00 PM
Place: Room 503 %>
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ASHRAE’s Indoor Air Quality Standard 62.1 and the Multiple Spaces Equation
This talk will describe the Standard development process at ASHRAE, the history of the development of Standard 62.1, and the technical problems of ventilating large buildings.
Speaker: Grenville Yuill, Ph.D.
Dr. Yuill is the Founding Director of the Durham School of Architectural Engineering and Construction at the University of Nebraska-Lincoln. Previously, he has held academic positions at the University of Nebraska-Lincoln, Penn State University, and the University of Manitoba. He was the president of G. K. Yuill and Associates Ltd., a Consulting Engineering firm, for 12 years, and of Lion Industries Ltd., a manufacturer of electric heating products, for four years. He earned his Ph.D. in mechanical engineering from the University of Minnesota in 1972.
Dr. Yuill’s research interests are in air flow in buildings and in building energy modeling.
He has been active in several professional organizations including the American Society of Heating, Refrigeration, and Air-Conditioning Engineers, where he has been active on Technical and Standard Committees for over 30 years and is now a Fellow and Life Member. He was a member of the National Research Council of Canada for six years.
Date: 7/30/2008
Time: 2:00 PM
Place: RCR %>
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The Global Technology Outlook (GTO)
Speaker: Dr. Jarir K. Chaar, Director
Technology and Innovation, GBS Master Inventor, IBM Global Business Services
Time: Thursday July 24, 2008 at 12:30
Abstract
The Global Technology Outlook (GTO) is IBM?s projection of the future for information technology (IT). It highlights emerging software, hardware, and services technology trends that are expected to significantly impact the IT sector in the next 3-7 years. In particular, the GTO identifies technologies that may be disruptive to an existing business, have the potential to create new opportunity, and can provide new business value to our customers.
The 2008 GTO focuses on a number of architectural changes that are occurring, from the core technology, due to the physical limitations of CMOS technology, all the way out through applications and devices such as mobile enterprise devices ? and everything in between.
This talk will cover several new trends and technology requirements including the scalable, modular compute nodes that comprise the core computer architectures; the integration of these cores into new enterprise infrastructure ecosystems to create Internet-scale datacenters with more scalable architectures that are very sensitive to power consumption; the massive community and information-centric web platforms that are being built on these datacenters; mobility and the need for analytics.
Biography
Dr. Jarir Chaar is the Director of Technology and Innovation for Application Services (AS) in Global Business Services (GBS). He is also a GBS Master Inventor with 5 issued patents and 25 patent filings, and is the CTO of the Application Factory initiative in GBS. The Application Factory brings together proven software development and IT lifecycle management processes, decision-making based on key metrics, architectural disciplines such as SOA, and high-value asset reuse ? all enabled by SWG products - to help close the productivity and quality gaps when leveraging geographically distributed teams to build, deploy and support applications and services. Prior to joining AS, he was a senior member of IBM Research and their lead ?Services Strategist? in the 2000-2004 timeframe.
Dr. Jarir Chaar received his Ph.D. degree in Computer Science and Engineering from The University of Michigan -- Ann Arbor in June 1990. He is a senior member of the IEEE and a member of Tau Beta Pi. He can be reached at jarir@us.ibm.com.
Date: 7/24/2008
Time: 12:30 PM
Place: Engineering Board Room (RCR) %>
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Mobile Wheeled Robots (MWR)
Presented by
Dr. Danielle Nasrallah
Abstract
This talk introduces mobile wheeled pendulums, a new class of mobile wheeled robots.
Applications and industrial products using MWP are presented first and then modelling, controllability study and control follow.
The mathematical model is formulated using the natural orthogonal complement method.
The control Lie algebra is then constructed and results on local accessibility, small-time local controllability and the largest feedback linearizable subsystem are deduced.
A three-loop control scheme is then suggested to control the position and the orientation of the robot, followed by an experimental validation of the control algorithm.
Biography
Dr. Nasrallah, Ph.D. in Robotics, McGill University, Montreal, Canada and she is Assistant Professor in Royal Military College of Canada, Kingston, ON, Canada.
Date: 8/6/2008
Time: 2:00 PM
Place: RCR Room %>
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Transport phenomena and reaction engineering: basic research and practical applications
Presented by
Dr. R. Di Felice
Department of Chemical and Process Engineering
Università degli Studi di Genova
GENOVA (Italy)
Abstract
Aim of this presentation is to give an overview of the research work being presently carried out by the “Reaction Engineering Group” of the Chemical and Process Engineering Department, University of Genova (Italy).
The research group has been tackling for the past 25 years problems concerning the fluid dynamic behaviour of solid-fluid two-(and three-) phase systems, with particular reference to solid-liquid suspensions. Of the many aspects investigated few examples, where the contribution of the group has been more important in advancing fundamental knowledge, will be reported in detail such as the mixing and segregation of binary-solid mixtures fluidised by water, the sedimentation velocity of solid spheres differing in size and/or density and the experimental verification of proposed hydrodynamic scaling relationship for fluidisation.
The second part of the presentation will focus on the contribution made on interdisciplinary subjects, where typical chemical engineering know-how have been applied to apparently very different situations. Examples reported will include:
· Pollutant removal from a gas stream by bio filtration, investigated in collaboration with the “Biotechnology Research Group” at the Department of Chemical and Process Engineering
· Experimental studies and mathematical modelling of membrane contactors (for water and wastewater treatment and for the removal of carbon dioxide from a gas stream) and three-phase catalytic membrane reactors (for selective hydrogenations and oxidations) in collaboration with the “Membrane Research Group” at the Department of Chemistry and Industrial Chemistry.
· Fuel Processing and Hydrogen production within the Rolls-Royce Fuel Cell Systems University Technology Centre.
· Gas permeation in plastic container with passive and active walls for shelf life estimation.
Biography
Dr. Renzo Di Felice is a professor at the University of Genova (Italy), Department of Chemical and Process Engineering. He earned his PhD from University College London in 1988 and his D. Sc from University of London UK in 1997. He is the Deputy Director of the “Rolls-Royce Fuel Cell University Technology Centre”. His research interests are in multiphase chemical reactor behavior, with particular reference to solid-fluid two and three phase suspensions. He has more than 100 articles in peer reviewed journals and similar number of conference presentations.
Date: 9/22/2008
Time: 3:00 PM
Place: RCR Room %>
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PIV MEASUREMENTS IN THE WAKE OF A CACTUS SHAPED CYLINDER
Abstract:
The flow field past a cylindrical model with a cactus-shaped cross section is investigated in a wind tunnel. The velocity field in the immediate wake just aft of the cylinder and the surface pressure distribution are measured. The data from the cactus model are compared to a similar model with a circular section.
The mean flow patterns have generally a similar form for the two geometries. However, there are differences in the surface pressure distribution and the turbulent velocity levels in the wake.
Date: 10/20/2008
Time: 4 PM
Place: Bechtel 503 %>
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BUEVA: a bi-directional ultrasonic elliptical vibration actuator for micro-machining
Abstract:
Recently, there has been a growing interest in machining at the micro-scale as replacement for more complicated and traditional processes such as those that are associated with semiconductor fabrication. The setup presented here is a bi-directional ultrasonic elliptical vibration actuator (BUEVA) and is proposed to be used in micro-scale cutting of a variety of materials including brittle materials such as ceramics.
BUEVA utilizes ultrasonic elliptical vibrations to remove material. The elliptical motion of the tool is generated by two piezoelectric stacks vibrating out of phase along the axis (axial direction) of the tool and in the transverse direction. The amplitude of tool vibration in both directions can be controlled to vary the cutting depth according to the required parameters of the induced motion. To ensure precise tool positioning during cutting, the actuator is fitted to the spindle of a machining center that provides the global tool path motion.
The cutting forces and the surface finish generated by the BUEVA are measured by a 3-axis dynamometer and a surface profilometer, respectively.
When compared to the traditional machining forces and surface finish, the experimental results shows that when using the BUEVA, smaller cutting forces are generated and resulting in a better surface finish. Optimization of a number of independent variables including the piezolelectric elements'
amplitude (2 variables, one for the horizontal stack and another for the vertical stack) and frequency (2 variables, one for each stack), and in-line feed aims to create better control of the dependent variables (e.g. depth of cut and micro-chip control) resulting in better dimensional accuracy of the machined micro features as well as better surface finish.
Time: 12:30 PM
Date: 10/30/2008
Time: 12:30PM
Place: Bechtel Room 503 %>
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BUEVA: a bi-directional ultrasonic elliptical vibration actuator for micro-machining
By
Ali Ammouri
Abstract:
Recently, there has been a growing interest in machining at the micro-scale as replacement for more complicated and traditional processes such as those that are associated with semiconductor fabrication. The setup presented here is a bi-directional ultrasonic elliptical vibration actuator (BUEVA) and is proposed to be used in micro-scale cutting of a variety of materials including brittle materials such as ceramics.
BUEVA utilizes ultrasonic elliptical vibrations to remove material. The elliptical motion of the tool is generated by two piezoelectric stacks vibrating out of phase along the axis (axial direction) of the tool and in the transverse direction. The amplitude of tool vibration in both directions can be controlled to vary the cutting depth according to the required parameters of the induced motion. To ensure precise tool positioning during cutting, the actuator is fitted to the spindle of a machining center that provides the global tool path motion.
The cutting forces and the surface finish generated by the BUEVA are measured by a 3-axis dynamometer and a surface profilometer, respectively.
When compared to the traditional machining forces and surface finish, the experimental results shows that when using the BUEVA, smaller cutting forces are generated and resulting in a better surface finish. Optimization of a number of independent variables including the piezolelectric elements'amplitude (2 variables, one for the horizontal stack and another for the vertical stack) and frequency (2 variables, one for each stack), and in-line feed aims to create better control of the dependent variables (e.g. depth of cut and micro-chip control) resulting in better dimensional accuracy of the machined micro features as well as better surface finish.
Time: 12:30 PM
Date: 10/30/2008
Time: 12:30PM
Place: Bechtel Room 503 %>
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BUEVA: a bi-directional ultrasonic elliptical vibration actuator for micro-machining
By
Ali Ammouri
Abstract:
Recently, there has been a growing interest in machining at the micro-scale as replacement for more complicated and traditional processes such as those that are associated with semiconductor fabrication. The setup presented here is a bi-directional ultrasonic elliptical vibration actuator (BUEVA) and is proposed to be used in micro-scale cutting of a variety of materials including brittle materials such as ceramics.
BUEVA utilizes ultrasonic elliptical vibrations to remove material. The elliptical motion of the tool is generated by two piezoelectric stacks vibrating out of phase along the axis (axial direction) of the tool and in the transverse direction. The amplitude of tool vibration in both directions can be controlled to vary the cutting depth according to the required parameters of the induced motion. To ensure precise tool positioning during cutting, the actuator is fitted to the spindle of a machining center that provides the global tool path motion.
The cutting forces and the surface finish generated by the BUEVA are measured by a 3-axis dynamometer and a surface profilometer, respectively.
When compared to the traditional machining forces and surface finish, the experimental results shows that when using the BUEVA, smaller cutting forces are generated and resulting in a better surface finish. Optimization of a number of independent variables including the piezolelectric elements'amplitude (2 variables, one for the horizontal stack and another for the vertical stack) and frequency (2 variables, one for each stack), and in-line feed aims to create better control of the dependent variables (e.g. depth of cut and micro-chip control) resulting in better dimensional accuracy of the machined micro features as well as better surface finish.
Time: 12:30 PM
Date: 10/30/2008
Time: 12:30PM
Place: Bechtel Room 503 %>
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Chemical Engineering: A Reactor Design for Remediation; The OPCW—Verifying Production Capacities<
By:
Nathalie Rouhana, PhD
Abstract:
Chemical engineering is a diverse field with applications extending into both biochemical synthesis and degradation using bacterial and mammalian cells. Bacterial microorganisms can be used to decompose organic components into products such as carbon dioxide, water, organic acids, and salts, thereby transforming contaminants into benign products. These biocatalytic processes are effective in volatile organic compound (VOC) removal in the treatment of hazardous air emissions. Typically, the reactors used consist of a biocatalyst immobilized onto an inert packing material through which waste gases flow and are microbially degraded. These types of reactors have wide applications in chemical paint, dye, and resin industries, pharmaceutical industries, and to control off-gas emissions in wastewater treatment. This presentation presents a specifically engineered type of reactor-a radial flow bioreactor-in the biodegradation of a VOC. Its experimental design, chemical engineering modeling developed from mass balance equations, and solution via mathematical finite element modeling are discussed. Further discussed are other applications of the details of this reactor design and functionality.
An issue of relevance to the international community is the implementation of the objectives set forth by the Organization for the Prohibition of Chemical Weapons (OPCW), which seeks to eliminate chemical weapons stockpiles and production facilities. Sound engineering and scientific principles, notably in the chemical field, are key to the analysis and verification of past production capacities and future use of existing chemical process equipment. Calculations based on past production of various agents must be performed a priori not only to verify production claims but also to establish confidence in a party’s submitted declaration. An example of the methodology and some of the problems encountered in a real-life example are discussed in relation to the validation of a States Party declaration to the OPCW.
Time: 12:30PM
Date: 11/27/2008
Time: 12:30 PM
Place: Bechtel 503 %>
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Structural Dynamics and Control of Membrane Mirrors for Adaptive Optic Applications
By
Dr. Jamil Renno
*Abstract*: Current and future space exploration rely on space-borne telescopes, of which mirrors are an integral component. However, traditional solid mirrors are heavy and require a large space. Using membrane mirrors is an excellent alternative; they are lightweight and can be compactly stowed. However, membrane mirrors exhibit undesirable vibrations which will adversely affect the optical quality. This work aims at modeling and controlling a membrane mirror augmented with piezoelectric actuators near its rim. The control objective is to correct for image aberrations. We consider a circular membrane augmented with piezoelectric bimorph actuators. We derive the governing equation of the structure for the general configuration, where actuators are producing bending moments and radial loading.
Then, we seek a reduced order model of the structure. We obtain a Galerkin expansion of the model where the test functions used are the mode shapes of the structure as obtained from a finite element analysis. A transformation from the optical modes to the mechanical modes is presented and an augmented adaptive controller is used to correct for image aberrations. The results presented demonstrate that the controller can correct for various optical aberrations.
*Biography*: Jamil Renno finished his BS and MS in Mechanical
Engineering from the University of Nevada, Las Vegas in 2003 and 2005 respectively. For his MS thesis, he designed and simulated a robotic work cell for the manufacturing of transmuted nuclear waste. During his BS and MS, he also worked on the fuzzy logic and classic control of overhead cranes and flexible manipulators. In 2005, he started his PhD in Mechanical Engineering at the Center for Intelligent Material Systems and Structures in Virginia Tech. The focus of his PhD was the modeling and control of membrane mirrors actuated using piezoelectric bimorphs with the objective of correcting for optical aberrations.
Jamil also worked on energy harvesting topics including optimization and design.
Time: 4:30 to 5:30 PM
Place: Bechtel Room 503.
Date: 12/15/2008
Time: 4:30 PM
Place: Bechtel 503 %>
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Assessment of the Homogeneous and Inhomogeneous MUSIG Models for the Prediction of Bubbly Flows w
By
Adnan Akhdar
Abstract:
This project deals with the formulation, implementation, and testing of two numerical techniques for the prediction of bubbly flows taking into account the Breakup and Coalescence processes: (i) a multisize-group (MUSIG) approach, and (i) a heterogeneous MUSIG (H-MUSIG) approach. The performance of the algorithm will be assessed by solving a series of single phase and two-phase test problems. The validation procedure for the single-phase case will revolve around solving Laminar and Turbulent Flow problems while the procedure for the two-phase case will revolve around solving the horizontal and vertical transport of Fluid-Fluid problems and Fluid-Particle problems.
Date: 12/23/2008
Time: 3:00 PM
Place: Bechtel 503 %>
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THESIS DEFENSE on The liquid micro-jet from laser induced cavitation bubbles
Presented by: Jack Abboud
ABSTRACT
A cavitation bubble grows spherically in an infinite medium to a maximum radius, collapses to a minimum volume while retaining its spherical shape, and then may rebound for a second or more oscillations before it disintegrates into many micro bubbles. However, when the bubble collapses above a blank solid boundary, a fast liquid micro-jet is formed owing to the asymmetry of the surrounding flow field: it starts by penetrating the upper bubble wall, impacts the lower side of the bubble and then continues its path towards the wall, leading to a deformation in the bubble. This fast micro-jet seems to be responsible of cavitation erosion and damage in hydro-machinery. In this work, we are motivated by the liquid micro-jet formation from laser-induced cavitation bubbles, its speed at impact, and the potential for cultivating this jet for a variety of applications such as micro surgery of soft tissue once a hole is intentionally drilled in the solid boundary underneath the collapsing bubble, where the jet is destined. Bubbles will be generated in an infinite medium, as well as above blank and drilled solid boundaries. Investigations will be focused on the dynamics of the bubble and jet, as a function of their distance to the wall for the case of blank solid boundary, and as function of the hole diameter once a hole is present in the wall.
Time: 3:30 PM
Date: 2/10/2009
Time: 3:30PM
Place: Room 503 %>
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Model Based Design: Observer, Control and Fault diagnosis
By
Dr. Hassan Shraim
Biography:
Doctor Hassan SHRAIM received his Bachelor’s degree in mechanical Engineering from the Lebanese University in 2003. In July 2004 and June 2007 correspondingly, he received his Master’s degree in Modeling of complex systems and his Ph.D. degree in Automatic controls from the University of Paul Cézanne Aix Marseille III. In July 2007 he joined the European project DIAFORE (Diagnosis for distributed functions) as a researcher with the CNRS (French National Center of Scientific Research), CEA (Atomic Energy Commission) and (Renault-Volvo Trucks). In February 2008, he joined Sherpa Engineering company to work mainly on the Research projects with the partners (CEA, Peugeot, Delphi, Continental…). His research interests include variable structure systems, model based design (non linear estimation and identification, diagnosis and control). Dr. Shraim is an author of a book (Sliding Modes Control for mechanical systems) (will be published in 2009) and one book chapter. He published 5 industrial reports and more than 18 technical papers.
Date: 2/26/2009
Time: 12 PM
Place: Bechtel 503 %>
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Emission factors and size distribution of second-hand smoke from a narghile waterpipe
By
Nancy Daher
Thesis Abstract:
Up to this date, little is known about the composition and health effects of narghile smoke. Narghile use then remains unlisted in second-hand smoke legislations although it has become a common practice in indoor settings. The aim of this study was therefore to determine the emissions and size distribution of particles in narghile second hand smoke (nSHS) which will provide more insight on human health exposure to nSHS.
The study method consisted of conducting chamber-based studies where the narghile is considered as an indoor pollutant source subject to the actions of ventilation, evaporation, coagulation and surface deposition. Yields of narghile key pollutants (carbon monoxide, polycyclic aromatic hydrocarbons, aldehydes, ultrafine particles, respirable particulate matter) were determined from a mass/number balance approach on the chamber using measured particle concentrations and estimated loss rates. Coagulation loss rate was determined numerically by implementing a code that accounts for Brownian coagulation and convection. Particle deposition on the chamber surfaces was determined by measuring number and volume concentrations decay using a non-volatile aerosol (DEHS) injected into the chamber. Evaporation loss rate was inferred from overall measured loss rate and estimated coagulation, ventilation and deposition loss rates.
Findings showed that nSHS is associated with emissions and inhalation of large quantities of carcinogens and toxicants. Moreover, during a typical hour where one narghile and two cigarettes are smoked, one narghile smoker emits the equivalents of 2-17 smokers, depending on the considered pollutant. Smoke legislations should then be re-implemented to include second-hand smoke from narghile.
Date: 6/10/2009
Time: 12 PM
Place: RCR %>
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EFFECT OF VENTILATION PERIODICITY ON CARBON MONOXIDE FORMATION IN A TRANSIENT FORWARD SMOLDERIN
By
Elie Kfoury
Thesis Abstract:
Laboratory measurements of smoked tobacco products are routinely performed to compare toxicant and carcinogen yields across products and to provide information on potential health hazards arising from the use of these products. Standard cigarette smoke measurement methods have for the past 50 years utilized a steady periodic puffing regimen (i.e. a fixed puff volume, puff duration, and interpuff interval) to produce the test smoke for toxicant yield analyses. While using a steady periodic regimen simplifies the test procedure, smoothing the highly variable puffing characteristic of real smoking may bias the production of combustion-generated toxicants because combustion kinetics is highly non-linear. This thesis aims to study the effect of representing real puffing behavior with a steady periodic puffing model by comparing experimental carbon monoxide yields generated with a machine programmed to use real and steady periodic puffing regimens. To do so, smoking topography recordings from 45 human subjects in Beirut area cafés were reproduced (?played-back?) using a digital smoking machine and the CO yields of these sessions were captured and measured. On the other hand, the equivalent steady periodic topography of 38 of the 45 cases were also played-back and their CO yields were measured and compared to the CO yield of that of the corresponding 38 real smoking sessions.
It was found that real smoking sessions produce 16% more CO than their equivalent steady periodic sessions. These experiments also showed that the CO yield is negatively correlated with flow rate (a greater flow rate causes a decrease in CO yield). To understand the phenomena underlying the relationship between ventilation periodicity and smoke toxicant yields, a one-dimensional transient forward smoldering charcoal bed model (which represents the burning charcoal on a narghile head) was developed and implemented numerically to simulate the smoking process and calculate the CO yield and gain an insight on how temperature and species interact to dictate CO production trends. The computational model agreed with the experiments in showing that real smoking sessions produce on average 23% more CO than their steady periodic equivalents. The variation of the controlling parameters show that flow rate variability, and not variability in puff duration or interpuff interval, causes a real smoking session to exhibit higher CO yields than its steady periodic analog. Simulations indicate that this effect is derivative to slow chemistry relative to thermal convection in the relevant ventilation regime of this problem.
Date: 6/2/2009
Time: 3:30
Place: R503 %>
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| EMP Archived Seminars |
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No seminars are available at the moment. Please visit later.
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| Other Archived Seminars |
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OPPORTUNITIES AND CHALLENGES FOR AUB IN THE OIL AND GAS INDUSTRY
Faculty of Engineering and Architecture(FEA)
Mechanical Engineering Department
cordially invite you to attend a seminar by:
Dr. Sadad Al-Husseini , Saudi Aramco
entitled:
"OPPORTUNITIES AND CHALLENGES FOR AUB IN THE OIL AND GAS INDUSTRY"
Date:Thursday, March 23, 2006
Time: 3:30 PM
Place: Rizk Conference Room (RCR), Bechtel Engineering Building
Date: 3/23/2006
Time: 12:00 AM
Place: unspecified %>
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