Prof. Richard Haverkamp, Massey University, New Zealand
Biography: Professor Richard Haverkamp holds a Personal Chair in Nanotechnology at Massey University in New Zealand and teaches in the School of Engineering and Advanced Technology. His research covers nanostructure and mechanical relationships in collagen materials, nanomaterials for electrochemical processes, and materials from mineral resources. He makes extensive use of a variety of synchrotron techniques, most often at the Australian Synchrotron. He graduated with a PhD from the University of Auckland, New Zealand, and he has held visiting research positions at NTNU, Trondheim, Norway and MIT, Cambridge, USA. He has published about 100 journal papers and received a number of awards including the President’s Medal from the Institute of Professional Engineers NZ, and the Gold Award from the Ministry of Innovation Business and Employment, NZ. He has received research funding from government and industry sources from NZ, US, Norway, Australia, France, Canada, Taiwan and Japan.
Speech Title: Iridium Oxide and Iridium-Ruthenium Oxide for Oxygen Evolution
Abstract: Hydrogen can be produced using proton exchange membrane water electrolysis. In this process, water is split to give oxygen, electrons and protons at the anode. These protons pass through the membrane and are reduced at the cathode to hydrogen gas. The anodic reaction requires the largest overpotential and therefore limits the current efficiency of water electrolysis. In acidic conditions IrO2 based catalysts are the most active. Here we discuss catalysts for the oxygen evolution reaction consisting of both pure IrO2 and of mixed IrO2-RuO2 catalysts. Structure and activity of mixed catalysts prepared in different ways is demonstrated. Structure and activity of mixed catalysts when supported on conductive doped SnO2 is also discussed. The nature of the electronic structure of electrochemically formed iridium oxide films (EIROF) is investigated by in-situ conductivity measurements in an electrochemical cell and ex-situ current-sensing atomic force microscopy (CS-AFM). This work expands our fundamental knowledge of the mechanism of action of these catalytic materials and brings the technology closer to more energy efficient electrolytic production of hydrogen for a sustainable transport fuel option.
Prof. C. W. Lim, City University of Hong Kong, Hong Kong
Biography: Dr. Lim obtained a B.Eng. (1989) in Mechanical Engineering (Aeronautics) from Universiti Teknologi Malaysia (UTM), a M.Eng. (1992) in Mechanical Engineering from National University of Singapore (NUS) and a PhD (1995) in Mechanical Engineering from Nanyang Technological University (NTU), Singapore. From 1995 to 1997, he was a Postdoctoral Fellow at Department of Civil Engineering, The University of Queensland, Australia. He was later appointed as a Research Fellow at Department of Mechanical Engineering, The University of Hong Kong from December 1997. In February 2000, he joined Department of Building and Construction, City University of Hong Kong as an Assistant Professor and later promoted as an Associate Professor in February 2003. He is also a Guest Professor of Huazhong University of Science and Technology (HUST) since March 2006.
Dr. Lim is a fellow of International Biography Association, Cambridge, England since 2000. He is a member of American Society of Mechanical Engineers (ASME), American Society of Civil Engineers (ASCE), Acoustical Society if America (ASA) and Structural Engineering Institute of ASCE. he is also a member of The Hong Kong Institution of Mechanical Engineers (HKIE) and a Registered Professional Engineer (RPE). He has been listed in Marquis Who's Who in the World, Dictionary of International Biography and Marquis Who's Who in Science and Engineering. Among the awards Dr. Lim has obtained are Best Academic Performance Medal in Mechanical Engineering (Aero) in 1989, University of Queensland Postdoctoral Fellowship (1996-97), University of Hong Kong Research Fellowship (1998-2000).
Dr. Lim has published a book on Symplectic Elasticity, more than 130 refereed technical papers and more than 60 international conference papers. His publications have attracted more than 850 independent citations in refereed international journals, numerous technical notes, international conferences papers and research theses since 1993. He is the Associate Editor (Asia-Pacific Region) for Advances in Vibration Engineering, and on the editorial board of three other international journals, as well as in the International Advisory Committee of numerous other international conferences. He has attracted more than 20 research grants as Principal Investigator and others as Associate Investigator since 1995. He also acts as a reviewer for books published by John Wiley & Sons, Kluwer Academic Publishers and for technical papers of more than 40 prestigious international journals.
Speech Title: Thermoacoustic Modeling and Applications of CNT Thin Film Arrays
Abstract: In this research, a thermoacoustic transducer model with carbon nanotube (CNT) thin film arrays is developed. By using a new spherical thermoacoustic model for linear and planar thin film arrays, exact analytical solutions of acoustic pressure response are established and the results show high acoustic beam directivity. Subsequently, the optimal array design characteristics and parameters are determined with respect to thebeamwidth and side-to-main lobe ratios. The acoustic performance is significantly influenced by the input frequency, element number, element length, inter-element spacing, etc., and their effects are presented. Comparison of theory and experiment is conducted and very good agreement is reported. Some numerical examples are presented and the numerical solutions show that the acoustic performance of the main lobe sharpness can be greatly improved by increasing the input frequency, element length and inter-element spacing. For improved acoustic pressure and directivity while considering optimal energy efficiency, the largest possible element length, inter-element spacing and element number should be adopted in the design.
Prof. Syuma Yasuzuka, Research Center for Condensed Matter Physics, Hiroshima Institute of Technology, Japan
Biography: Syuma Yasuzuka was born in Sapporo, Japan in 1972. He obtained his B. Eng. (1996) degree from the Muroran Institute of Technology, and M. Eng. (1998) and Ph. D. (2001) degrees from the Hokkaido University. He was a postdoctoral fellow of the Japan Society for the Promotion of Science (JSPS) at the National Institute for Materials Science (NIMS) in Tsukuba (2001-2003). During that period, he stayed at the National High Magnetic Field Laboratory (NHMFL) in Florida, from May to December 2002 as a visiting researcher. He moved to the Osaka City University, as a postdoctoral fellow (2003-2006). He was an assistant professor at University of Tsukuba (2006-2011). He worked at the Hiroshima Institute of Technology as an associate professor (2011-2017). Since 2017, he has been a professor at the Hiroshima Institute of Technology. He has worked on the experiments of vortex dynamics, fermiology (Fermi surface study), and pairing symmetry in organic superconductors and strongly correlated electron systems. One of the recent publications is “Dimensional Crossover and Its Interplay with In-Plane Anisotropy of Upper Critical Field in beta-(BDA-TTP)2SbF6.” [J. Phys. Soc. Jpn., 86 (2017) 084704/1-6.] This paper has been selected as the Papers of Editors' Choice by JPSJ Editorial Board.
Speech Title: Interplay between Vortex Dynamics and Superconducting Gap Structure in Organic Superconductors with D-Wave Pairing Symmetry
Abstract: Physics in superconductivity based on Bardeen-Cooper-Schrieffer (BCS) theory has been deeply understood. The superconducting (SC) transition is a second order phase transition associated with a spontaneous symmetry breaking. Consequently, the order parameter that appears below the SC transition temperature characterize the lowering of the symmetry in the SC state compared to the normal state. The SC order parameter is also related to the SC gap structure and is intimately related to the pairing interaction. In the case of BCS superconductivity mediated by the electron-phonon interaction (conventional superconductivity), the SC gap function is isotropic in the momentum space. On the other hand, the gap functions of the superconductivity due to strong electron-electron repulsion (unconventional superconductivity) mostly have nodes along certain directions in the momentum space. Thus, the experimental determination of the SC gap structure is of prime importance in the strongly correlated electron systems such as heavy fermion compounds, high Tc cuprates, and organic conductors. In this context, we have demonstrated that measurement of resistance under a magnetic field (flux-flow resistance) rotated within conducting layers provide a clue for determining the nodal directions. In this conference, we present the experimental results for the angular variation of the flux-flow resistance in layered organic superconductors. Nodal structures and the pairing interactions for these superconductors are discussed.
Prof. Josip Brnić, University of Rijeka, Croatia
Biography: Professor Josip Brnić, D. Sc., was born in 1951. on the Island of Krk, Croatia. Primary and secondary education was acquired on the island of Krk. He graduated in Mechanical Engineering at the Faculty of Engineering, University of Rijeka (Croatia). He received his master’s degree at the Faculty of Mechanical Engineering, University of Ljubljana (Slovenia) and his doctoral degree at the Faculty of Engineering, University of Rijeka (Croatia). Currently he is professor with tenure at the Faculty of Engineering, University of Rijeka. One period, at the beginning of his career (12 years) he worked in parallel as a university professor at the Faculty of Engineering at the Department of Engineering Mechanics and in the project organization "Brodoprojekt" Rijeka on structure analyzes of submarines and other floating objects. He was Vice-Dean and Dean (two mandates) of the Faculty of Engineering of the University of Rijeka, Vice-Rector and Rector of the University of Rijeka. He was a member of the National Council for Science of the Republic of Croatia (two mandates), and President of the Scientific Council for Engineering Sciences of the Republic of Croatia (three mandates). Also, he is an Associate member of the Croatian Academy of Sciences and Arts. Apart from being active at the Faculty of Engineering, University of Rijeka, he is teaching also on doctoral study at the Faculty of Mechanical Engineering Slavonski Brod / Croatia. He gave a number of lectures at the Harbin Institute of Technology (Harbin / China), Tai-Yuan University (Tai- Yuan / China), Huazhong University of Science and Technology (Wuhan / China), Shanghai University (Shanghai / China), Shenyang University of Technology (Shenyang / China) as well as at Henan Polytechnic University (Jiaozuo / China). His scientific researches are focused primarily on two essential points, the first of which is numerical analysis of structures and machines using finite element method and the second referring to the experimental analysis of the material behavior of structure subjected to different environmental conditions, i.e., to different stress levels and differenet temperatures (lowered and elevated temperature regime), creep and fatigue. He is a mentor to candidates for doctoral theses, masters and diploma theses. He is a reviewer of scientific papers for several prestigious international journals indexed in Current Contents as well as many books. He speaks English and uses German and Slovenian.
Speech Title: Behavior of Materials Used in Design of Highly Stressed Engineering Components at Different Temperatures
Abstract: The proposed paper considers the mechanical behavior of materials usually used in engineering for design and manufacture of highly stressed components. A term behavior involves both the mechanical and elastic properties of the material as well as its creep and fatigue behavior. Between the materials used for the aforementioned purposes are considered the steel alloys such as 30CrNiMo8, 20MnCr5, etc. At different temperatures investigated mechanical properties of the materials were ultimate tensile strength, yield strength and modulus of elasticity, while in the area of mechanical responses were explored / tested creep behaviour and fatigue of the considered materials. Testing results of the material responses are presented in the form of stress-strain curves, creep curves and S-N curves (maximum applied stress versus the number of the cycles to failure). Moreover, while mechanical properties were tested at different temperatures, creep behaviour was investigated at different temperatures and different applied stress levels while fatigue of the considered materials was investigated for prescribed maximum uniaxial stress and for prescribed stress ratio. A general comparison of the obtained results regarding to considered materials have been made.