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- THE ROBERT M. & MARY HAYTHORNTHWAITE LECTURE SERIES
The Robert M. & Mary Haythornthwaite Foundation's Distinguished Lecture Series
Temple University’s College of Engineering is proud to announce Robert M. & Mary Haythornthwaite Foundation’s Distinguished Lecture Series. Esteemed educators and researchers will be giving lectures on a selection of topics in engineering and applied sciences. These lectures are free and all are invited to attend.By offering the regional engineering education community opportunities to attend these lectures, Temple’s College of Engineering hopes to foster research discussions among undergraduate and graduate students; broaden faculty research activities; and promote overall strong research environments in mechanics and related fields.
SELECT LECTURE |
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| LECTURE IV LECTURE III LECTURE II LECTURE I |
APRIL 25, 2006 MARCH 28, 2006 MARCH 14, 2006 FEBRUARY 14, 2006 |
College of Engineering 1947 N. 12th Street Philadelphia, PA 19122 |
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| Dr. Jim Chen Phone: 215-204-4305 jsjchen@temple.edu |
Dr. Parsaoran Hutapea Phone: 215-204-7805 hutapea@temple.edu |
LECTURE IV
"Nature-inspired Engineering Applications of Capillary Instabilities in Droplet Systems"
Paul H. Steen, Ph.D.
School of Chemical and Biomolecular Engineering
Cornell University, Ithaca, NY USA
Date / Time & Location
Tuesday, April 25th, 2006
2:40 p.m. – 3:30 p.m.
Room 126
Engineering & Architecture Building
Abstract
A ‘capillary surface’ is a liquid/liquid or liquid/gas interface whose shape is determined by surface tension. For typical liquids (e.g., water) against gas, capillary surfaces occur on the millimeter-scale and maller. Shape-change driven by surface tension arises from capillary instability. In a striking display from Nature, the palm beetle employs reversible super-adhesion to defend itself, based on scaling and parallel action. Inspired by this example, we seek to manipulate systems of coupled droplets. Applications include reversible super-adhesion, controlled wetting-gradients and particle manipulation by droplets. One focus of the presentation will be the droplet-droplet switch. Like the light-switch, it has an on/off states but toggling between droplet states is achieved by an electro-osmotic pump. This recently-devised actuator is characterized by green chemistry, individual addressability, rapid switching with low voltage and no moving solid parts.
About the Speaker
Dr. Paul H. Steen has been at Cornell since 1982. He is a Professor in the School of Chemical and Biomolecular Engineering, with field affiliations in Applied Mathematics and Theoretical and Applied Mechanics. His research is in the area of dynamics and stability of fluid systems with interfaces. Current focus is on shape-changes of gas/liquid and liquid/liquid interfaces and stability issues arising in the continuous casting of thin sheets of metal. He is a fellow of the American Physical Society (1996) and has been active in APS/Division of Fluid Dynamics affairs as chair of the Fluid Dynamics Prize Committee, and as a member of the Executive, Program, Publications and Frenkiel Award Committees. He has co-edited “A Gallery of Fluid Motion”, a DFD-APS project published by Cambridge University Press. He is an Associate Editor of the Journal of Fluid Mechanics. He has more than 60 journal publications and has edited several books. Prior to coming to Cornell, Steen received his PhD from The Johns Hopkins University in 1981 and held a post-doctoral position in Chemical Engineering at Stanford University, after having completed undergraduate degrees in Engineering and English Literature at Brown University. At Cornell, he has served as Director of Graduate Studies for Chemical Engineering. He has received an Alexander von Humboldt Fellowship and has been a Senior Guest Scientist at the Forschungszentrum Karlsruhe, Germany.
LECTURE III
"Adaptive Structural Systems – Recent Advances and Beyond"
K. W. Wang, Ph.D.
William E. Diefenderfer Chaired Professor in Mechanical Engineering
Structural Dynamics and Controls Lab
The Pennsylvania State University
University Park, PA
Date / Time & Location
Tuesday, March 28, 2006
2:40 p.m. – 3:30 p.m.
Room 126
Engineering & Architecture Building
Abstract
During the past couple of decades, due to the new advances in materials, electronics, and system integration technologies, structural dynamics and mechanics researchers in various disciplines (mechanical, aerospace, civil, etc.) have been investigating the feasibility of creating adaptive structures (also have been given names such as smart structures or intelligent structures). The ultimate vision is to create a structure that has built-in actuation, sensing, decision making, self-powered, self-diagnostic, and self-healing abilities. From a structural engineering point of view, the major challenge in recent years is on how to best utilize the multi-field characteristics of various active materials to optimally enhance the function of the overall integrated system. For example, considerable amount of research has been performed to enhance the piezoelectric transducer performance through mechanical and electrical tailoring. By synthesizing the mechanical configuration of piezoelectric materials, one can design the directional and functional characteristics of the piezoelectric actions. Such tailoring approaches could be very useful for both shape and vibration control of flexible structures. On the other hand, piezoelectric materials have been integrated with external electric circuitries to form piezoelectric networks, which can be synthesized in various passive, semi-active, and active-passive hybrid configurations. Through dual-field electro-mechanical tailoring, they can be utilized for different types of operations: such as damping augmentation, disturbance rejection, vibration delocalization, energy confinement, power harvesting, and health monitoring enhancement. Inspired by biological systems, another recent movement is to utilize multi-field coupling of the electrical, chemical and mechanical fields to design load bearing, large strain active structures. Many interesting phenomena have been explored and promising results have been illustrated. This presentation will review and assess some of the recent efforts in multi-field tailoring for adaptive structure control and monitoring enhancement.
About the Speaker
Kon-Well Wang, Diefenderfer Endowed Chair Professor in Mechanical Engineering at the Pennsylvania State University, received his B.S. degree from the National Taiwan University in 1976 and his Ph.D. from the University of California at Berkeley in 1985. Following three years as a senior research engineer at the General Motors Research Labs, he joined Penn State in 1988. Dr. Wang is currently Director of the Structural Dynamics and
Controls Research Laboratory and Associate Director of the Rotorcraft Center of Excellence at Penn State. Professor Wang's major technical interests are in structural dynamics and controls, and adaptive structural systems. He has published over 200 technical articles and is the holder of several patents in these areas. Professor Wang is a Fellow of the American Society of Mechanical Engineers, and has received numerous awards and recognitions, including the Society of Automotive Engineers Ralph Teetor Award, the Penn State Engineering Society (PSES) Premier Research Award, the PSES Outstanding Research Award, the PSES Outstanding Teaching Award, and the Foreign Invited Distinguished Professorship at Conservatoire National des Arts et Metiers in France. He has been invited to give lectures at various international conferences and institutions in the U.S., Europe, and Asia. Dr. Wang has chaired the ASME Technical Committee on Vibration and Sound and the Damping and Isolation Conference of the SPIE Smart Structures and Materials Symposium. He is currently Editor-in-Chief for the ASME Journal of Vibration and Acoustics and an Associate Editor for the Journal of Intelligent Material Systems and Structures.
LECTURE II
"Design of Wireless Smart Sensor for High Frequency Applications in Structural Health Monitoring"
Dr. F. G. Yuan
Professor of Aerospace Engineering
Research Coordinator of National Institute of Aerospace
North Carolina State University
Raleigh, N.C.
Date / Time & Location
Tuesday, March 14, 2006
2:40 p.m. – 3:30 p.m.
Room 126
Engineering & Architecture Building
Abstract
Nearly all in-service structures such as buildings, bridges, aircraft, ships, and spacecraft requires some form of maintenance for monitoring their integrity and health condition to prolong their lifespan or to prevent catastrophic failure. This promotes a highly interdisciplinary new emerging field, often called Structural Health Monitoring (SHM).
With recent advances in embedded computing technologies and vast reduction in size and power consumption of CMOS circuitry, several prototypes of miniaturized wireless sensors have become available for SHM. However, none of these prototypes can accommodate the need of high frequency applications which is critical for active diagnostic techniques. The demand of high I/O throughput for wireless smart sensors has been brought into much attention in detecting localized structural damage. To facilitate research in wireless sensor for SHM, a novel wireless sensor design using FPGA as cocontroller with ultrasonic sensing capability is designed, developed, and initially tested. This presentation highlights both the hardware and software development of the wireless sensor. With its compact modularized design, this configurable prototype can provide a versatile platform for wireless sensing research and development.
LECTURE I
"Building Integrative Computational Models of Angiogenesis"
Aleksander S. Popel, Ph.D.
Professor of Biomedical Engineering
School of Medicine and Whiting School of Engineering
Johns Hopkins University
Baltimore, Maryland
Date / Time & Location
Tuesday, February 14, 2006
2:30 p.m. – 3:30 p.m.
Room 126
Engineering & Architecture Building
Abstract
Angiogenesis (neovascularization), the growth of new blood vessels from the preexisting microvasculature, is a critical process both for the developing organs and for a variety of pathological conditions; over 70 diseases involve angiogenesis. Coronary and peripheral vascular disease may be cured by inducing new blood vessel formation. On the other hand, many diseases are caused or exacerbated by excess angiogenesis, e.g., solid tumors which are unable to grow beyond a certain size without inducing and recruiting their own vasculature, and diabetic retinopathy and age-related macular degeneration in which excessive vascularization leads to blindness. Rheumatoid arthritis and neurodegenerative diseases are other examples. Tissue engineered constructs require vasculature to provide delivery of oxygen and removal of waste products. Thus, both proangiogenic and anti-angiogenic therapies are being developed. To aid in the design of these therapies and to better understand the fundamentals of neovascularization, we have begun systematic development of computation models of angiogenesis based on the fundamental principles of biochemical kinetics, mass transfer and tissue micro- and nanomechanics. Angiogenesis is a complex process, where emergent behavior of cells results in the formation of microvascular networks. These phenomena are affected by biochemical, mechanical and microenvironmental factors. We started with molecular-level models of growth factor interactions with their receptors on the cell surface and the extracellular matrix, proteolysis of the matrix with matrix metalloproteinases, and cell signaling. We are working towards a multiscale integrative model of angiogenesis comprising a set of models spanning multiple levels of biological organization.