Talk I: How CD and DVD Players Work
演讲人：Masud Mansuripur College of Optical Scienses, The University of Arizona
主持人：陈哲教授
时间: 2015年10月8日9:45—11:15
地点：光电工程系309会议室
Abstract: Everyone is familiar these days with Compact Disk (CD) and Digital Versatile Disk (DVD) systems. In case familiarity has bred contempt for these marvels of modern technology, I will try to explain in simple terms the complex set of ideas and techniques that have made possible the construction of these Optical Data Storage devices. Information, be it analog (such as voice, still images, video) or digital (e.g., text, computer files, internet traffic) can be represented in binary format as a string of 0s and 1s. These binary strings can be stored on optical disks and retrieved (for reproduction) using lasers and other sophisticated opto-electronic instruments. In this presentation I will describe methods of conversion of the various forms of information into binary sequences, discuss methods of storing these sequences on CD and DVD platters, and explain how this information is reconstructed during playback.
Talk II: Advances in Macromolecular Data Storage
演讲人：Masud Mansuripur , College of Optical Scienses, The University of Arizona
主持人：余健辉副研究员
时间：2015年10月9日14:30—16:00
地点：光电工程系309会议室
Abstract: Many of the traditional problems in disk and tape data storage can be overcome if data-blocks were to be released from the confines of a disk (or tape) and allowed to float freely between read/write stations (i.e., heads) and permanent “parking spots.” The heads and parking spots thus become fixed structures within an integrated chip, while the macromolecular data blocks themselves become the (mobile) storage media. In this scheme, a large number of read/write heads could operate in parallel, the heads and parking spots would be constructed (layer upon layer) in a truly 3-dimensional fashion, and individual nanometer sized molecules—strung together in a flexible macromolecular chain—would be used to represent the zeros (0s) and ones (1s) of binary information. We discuss the potential advantages of this alternative scheme for secondary data storage and, to demonstrate the feasibility of the concept, present results of experiments based on DNA molecules that travel within micro-fluidic chambers. Since our first proposals to develop macromolecular data storage systems, other groups have contributed to developments in DNA-based techniques for information storage and processing. In this presentation we will discuss the latest developments reported by other groups as well.
Biography:Professor Masud Mansuripur (PhD, 1981, Electrical Engineering, Stanford University) is Professor and Chair of Optical Data Storage at the College of Optical Sciences of the University of Arizona in Tucson. He is the author of Introduction to Information Theory (Prentice-Hall, 1987), The Physical Principles of Magneto-Optical Recording (Cambridge University Press, 1995), Classical Optics and its Applications (Cambridge University Press,2002, second edition 2009, Japanese translation 2006 and 2012), and Field, Force, Energy and Momentum in Classical Electrodynamics (Bentham e-books, 2011). A Fellow of OSA and SPIE, he is the author or co-author of nearly 250 technical papers in the areas of optical data recording, magneto-optics, optical materials fabrication and characterization, thin film optics, diffraction theory, macromolecular data storage, and problems associated with radiation pressure and photon momentum.