Prof Jiming Song   the Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa, USA   http://home.engineering.iastate.edu/~jisong/ jisong@iastate.edu

Adaptive Cross Approximations for Eddy Current Nondestructive Evaluations 

Abstract:

Eddy current Nondestructive Evaluation (NDE) involves the detection of electromagnetic field irregularities due to non-conducting inhomogeneities in an electrically conducting material such as cracks, fasteners, sharp corners/edges, multi-layered structures, etc. The eddy-current problem is formulated by the Boundary Integral Equations (BIE) and discretized into matrix equations by the Method of Moments (MoM) or the Boundary Element Method (BEM). Computational tests are performed to demonstrate the accuracy and capability of the BIE method with a complex wave number for three-dimensional objects described by several triangular patches. Finally, our most recent research results on developing Adaptive Cross Approximation (ACA) to accelerate the impedance calculations for NDE applications will be presented.

Speaker bio:

Jiming Song received PhD degree in Electrical Engineering from Michigan State University in 1993. From 1993 to 2000, he worked as a Postdoctoral Research Associate, a Research Scientist and Visiting Assistant Professor at the University of Illinois at Urbana-Champaign. From 1996 to 2000, he worked part-time as a Research Scientist at SAIC-DEMACO. Dr. Song was the principal author of the Fast Illinois Solver Code (FISC).  He was a Principal Staff Engineer/Scientist at Semiconductor Products Sector of Motorola in Tempe, Arizona before he joined Department of Electrical and Computer Engineering at Iowa State University as an Assistant Professor in 2002. Dr Song currently is a Professor at Iowa State University’s Department of Electrical and Computer Engineering. His research has dealt with modelling and simulations of interconnects on lossy silicon and RF components, electromagnetic wave scattering using fast algorithms, the wave propagation in metamaterials, acoustic and elastic wave propagation and non-destructive evaluation, and transient electromagnetic field. He received the NSF Career Award in 2006 and is an IEEE Fellow and ACES Fellow.

Prof PingAn Hu   School of Materials Science and Engineering Harbin Institute of Technology (HIT), Harbin, China   hupa@hit.edu.cn

Flexible tactile sensors based on patterned nanostructures of graphene and 2D materials 

Abstract:

Flexible tactile sensors are of significance towards to artificial intelligence interface, robots. By exploiting atomically thick film of graphene and 2D semiconducting material, we develop highly sensitive and conformal pressures sensors for any curved surface using two dimensional (2D) nanomaterials. And we fabricate flexible electrical-skin devices for wearable health-monitoring devices and autonomous artificial intelligence systems such as robots using the array of functional microstructure (nanopyramid, patterned film etc.) of 2D materials. Furthermore, the self-powered piezotronic sensors made of these newly developed 2D piezoelectric film have been successfully used for real-time health monitoring, proving their suitability for the fabrication of flexible piezotronic devices due to their large piezoelectric responses and excellent mechanical durability.

Speaker bio:

Dr PingAn Hu is a Professor at the School of Materials Science and Engineering in Harbin Institute of Technology (HIT). He obtained his PhD degree from Institute of Chemistry, Chinese Academy of Science in 2004, and then he worked as a JSPS research fellow at Waseda University, Japan, and a Research Associate in University of Cambridge. He got New Century Excellent Talents in University of China in 2010 and Longjiang Special Professorship in 2011. His current research interests are focused on 2D materials, bio-inspired skin electronics and nanoscale photodetectors. He has published about 160 SCI papers in highly qualified international journals such as Physical Review Letter, Journal of American Chemical Society and Advanced Materials. His research has been introduced and commented by some international journals such as Nature Photonics, New Scientist.

Dr Isaratat Phung-On Maintenance Technology Center, King Monkut’s University of Technology Thonburi, Bangkok, Thailand    isa_ceo@yahoo.com

MAGNETIC PROPERTY CHANGED BY INTERACTION OF IMMUNO-MAGNETIC NANO-PARTICLE WITH BACTERIA CELL

Abstract:

In foodborne detection, Immuno-magnetic nanoparticles (IMNPs) are generally able to concentrate the target bacteria in any solution without enrichment processes which can help to reduce the processing time and cost for conventional detection methods. In addition, the magnetic properties change of IMNPs should be focused by detecting the change when IMNPS captured the target bacterium cell. To convince the feasibility of the developed bacteria detection test kit based on the electro-magnetic responding sensing in next development research, all steps in the IMNPs preparation and capturing process should be studied for improve the test kid development. This research explored the realistic mechanism of IMNPs, which lead to the change of the magnetic properties in the bacteria detection process. The research hypothesis was determined that the variation of magnetic properties could be from an atom and electron condition in IMNPs molecule. The synchrotron XAS with high sensitivity and resolution could discover the information of the atomic structure and electronic transfer of IMNPs throughout three surface modifications and the bacteria capturing steps for observing the effects of each step. The change of magnetic properties was approved by the vibrating sample magnetometer (VSM). 

Speaker bio:

Dr Isaratat is currently the Head of Maintenance Technology Center (MTC), Institute for Scientific and Technological Research and Services (ISTRS), at King Monkut’s University of Technology Thonburi (KMUTT), Bangkok, Thailand, where he has joined since 1999. In education, he received a B. Eng in Production Engineering (1st class honor) from the KMUTT in 1999. He received his M.S. and PhD in Welding Engineering from the Ohio State University in 2003 and 2007 respectively. His research interests are welding metallurgy, failure analysis, structural life assessment and Bioprocess equipment fabrication. Much of his work has been on improving the understanding, design, analysis and inspection of physical welding processes for various materials, mainly through the application of oil and gas, petrochemical and power plants industries. Asst. Prof. Isaratat has published researches and patents over 50 articles, including SCI journals. He also holds a diploma in the International Welding Engineering (IWE). There are also over ten patents filed under his invention related to his research interest.