University of Cambridge, UK
About: Professor Chu’s research activity has been in the areas of both theoretical and experimental condensed matter physics, semiconductor devices and materials, nanostructures and properties, ferroelectrics non-volatile memory devices, organic electronics and inkjet fabrication process. His current research includes space light modulation using holography for true 3D displays, digital illumination and optical communications. Combining 3D image reconstruction with full parallax and occlusion effects and spatial interactions in spectrum and time domains will provide participants the immersive experience which never exists before. This is now being explored through research work to increase both spatial and temporal bandwidths and development of new approaches to best utilise the existing technology. Energy saving, in particular in the built environment, presents a new challenge to electronic/photonic for innovative new technologies. Professor Chu’s research is focusing on the means for both the active modulation of the spatial profile and impact of lighting and the passive control of solar shading and radiation. Various successful approaches, including laminated electro-active foils (LEAFs) for retro-fitting and development at fundamental level of new devices and materials have been demonstrated.
Title: Wavelength Selective Switchesfor Software Defined Networks and Data Centres
Abstract:The high demand on the data traffic in modern optical communication networks pushes the backbone of the network for long distance data communication to all optical with the information kept in the optical domain in a wavelength division multiplexing (WDM)manner throughout the network until it reaches its final destination. It also requires dynamic routing and flexible definition of the network connectivity. This talk will review the advantages of holographic programmable wavelength selective switch (WSS) based on liquid crystal on silicon (LCOS) light engine as a key enabling technologies for software defined reconfigurable all optical networks, followed by the introduction of a new stacked WSS architecture to allow the WSSs to be reconfigured as ultra-high port count switches or non-blocking wavelength cross-connects (WXCs). Finally, it will address how this stacked WSS architecture can be utilized to meet the optical switching demand in large-scale data centres.
Haixi Institutes Chinese Academy of Sciences, China
PhD, Polarisation Shift Keying Modulated Free-Space Optical Communication Systems, Northumbria University, Newcastle, UK.
BEng (1st Class with Hons.), Electronic and Communications Engineering, Northumbria University, Newcastle, UK.
Diploma (3.8 out of 4, Hons.), Electronics, Computer and Communications Engineering, Nan Yang Polytechnic, Singapore.
Taiwan Tech (NTUST), Taiwan
About: Jenq-Shiou Leu received his B.S. in mathematics and his M.S. in computer science and information engineering from National Taiwan University, Taipei, Taiwan, in 1991 and 1993, respectively, and his Ph.D. on a part-time basis in computer science from National Tsing Hua University, HsingChu, Taiwan, in 2006. He was with Rising Star Technology, Taiwan, as an R&D Engineer from 1995 to 1997, and worked in the telecommunication industry (Mobital Communications and Taiwan Mobile) from 1997 to 2007 as an Assistant Manager. In February 2007, he joined the Department of Electronic and Computer Engineering at National Taiwan University of Science and Technology as an Assistant Professor. From February 2011 to January 2014, he was an Associate Professor. Since February 2014, he is a Professor and Vice Chairperson. Prof. Leu’s research interests include: Heterogeneous Network Integration, Mobile Service and Platform Design, Distributed Computing (P2P, Cloud Computing), Green and Orange Technology Integration. He has published extensively in these areas, with 55 SCI indexed journal papers and 57 conference papers or book chapters. He is a senior member of IEEE.
Title: Energy Efficient Streaming for Smartphone by Video Adaptation and Backlight Control
Abstract: Smartphone becomes an indispensable gadget in our daily life. Prolonging battery life on smartphone can extend the usability of the phone without being recharged, especially for accessing streaming video, which is a paramount service in the mobile Internet era. Many researchers have proposed energy efficient streaming methods, including bandwidth control and packet scheduling. Such studies have focused on reducing the energy consumption of central processing units (CPUs) and wireless networks; however, screens may drain substantial energy on smartphone. In this study, an energy efficient streaming sys- tem is proposed, combining adaptive coding and a backlight control mechanism. A non-parametric signal prediction is used to predict the network condition and then some adaptive encoding parameters are subsequently adjusted to fit the network capability. A histogram equalization is applied to compensate for the loss of image contrast after reducing the backlight. To validate the proposed concept, some experiments were conducted and the corresponding results show that the proposed streaming system can effectively reduce energy consumption on smartphone, while accessing the video streaming service.