Day 2 :
Keynote Forum
Ramesh K Agarwal
Washington University in St. Louis, USA
Keynote: Recent progress in acoustic metamaterials membranes for low frequency sound attenuation
Time : 09:00-09:25
Biography:
Professor Ramesh K. Agarwal is the William Palm Professor of Engineering at Washington University in St. Louis. From 1994 to 2001, he was the Sam Bloomfield Distinguished Professor and Executive Director of the National Institute for Aviation Research at Wichita State University in Kansas. From 1978 to 1994, he worked in various scientific and managerial positions at McDonnell Douglas Research Laboratories in St. Louis. He became the Program Director and McDonnell Douglas Fellow in 1990. Dr. Agarwal received Ph.D in Aeronautical Sciences from Stanford University in 1975, M.S. in Aeronautical Engineering from the University of Minnesota in 1969 and B.S. in Mechanical Engineering from Indian Institute of Technology, Kharagpur, India in 1968. He is the author and coauthor of over 500 publications and serves on the editorial board of 20+ journals. He has given many plenary, keynote and invited lectures at various national and international conferences worldwide. He is a Fellow of AAAS, ASME, AIAA, IEEE, SAE and SME.
Abstract:
Low frequency noise has long been regarded as a form of noise pollution due to its high penetrating power. The reduction of low frequency noise from aircraft and automobile engines remains a challenge since the conventional acoustic liners are not able to absorb the low frequency noise radiation. Membrane-type acoustic metamaterials (MAMs) have demonstrated unusual capacity in controlling low-frequency sound transmission and reflection. The MAM is composed of a pre-stretched elastic membrane with attached rigid masses. In this keynote paper, the problems associated with low frequency noise will be discussed. The recent analytical/computational/experimental research on acoustic metamaterial membranes in controlling and attenuating the low frequency noise will be presented.
Keynote Forum
Masahiro Goto
National Institute for Materials Science, Japan
Keynote: Nanostructured functional organic materials synthesized by a laser irradiation method for applications of molecular devices and high-sensitive sensors
Time : 09:25-09:50
Biography:
Masahiro Goto has completed his PhD at the age of 28 years from Nagoya University, Japan and postdoctoral studies from Institute for Molecular Science, National Institute of Advanced Industrial Science and Technology and Japan Atomic Energy Research Institute. He is the distinguished chief researcher of Center of Green Research on Energy and Environmental Materials in NIMS. He has published more than 92 papers in reputed journals.
Abstract:
Organic materials have caught much attention for their potential application in gas sensors, lasers, and organic field-effect transistors. For realizing such devices using organic molecules, it is necessary to generate nanostructured organic materials and to manipulate them onto the appropriate position of electric circuits.
rnWe have succeeded in developing a novel fabrication technique to synthesize nanostructured functional organic materials such as functional polymer nanowires and organic molecular nanoaggregates by a pulsed laser irradiation method. Polymer nanowires were generated by sub-nanosecond pulsed laser irradiation, and time-resolved shadowgraphy images of the growth of the polymer nanowires with uniform diameter at atmospheric pressure were recorded. Nanoparticles of FeO doped polymer nanowires were also successfully synthesized using this method. A plausible mechanism of polymer nanowire synthesis was proposed. Furthermore, a molecular nanojet in water, generated by the pulsed laser irradiation, has been successfully observed by the time-resolved observation method. The molecular nanojet was ejected through the center of a cavitation bubble, which was also generated by the laser irradiation in water. This observation shows us the generation process of the molecular nanojet. These techniques are expected to be utilized in a wide range of applications such as fabrication of molecular devices and ultrahigh-sensitivity sensors in the future.