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Prof. Seong Publishes English Book on Reliability in Digital Control Systems
Prof. Poong-Hyun Seong of Department of Nuclear and Quantum Engineering has recently published an English-language book on reliability and risk issues in large scale safety-critical digital control systems used in complex facilities such as nuclear power plants.
The book entitled “Reliability and Risk Issues in Large Scale Safety-critical Digital Control Systems” is a result of Prof. Seong’s collaboration with some KAIST graduates who used to be under his guidance. The 303-page publication has been published by Springer, one of the world’s leading publishers of academic journals, as part of the Springer Series in Reliability Engineering.
The book consists of four parts; part I deals with issues related to hardware, part II software, part III human factors and finally the last part integrated systems. It can be purchased through some on-line book stores such as Amazon.com.
Prof. Seong served as an editor-in-chief for Nuclear Engineering and Technology (NET), an international journal of Korean Nuclear Society (KNS), from 2003 to 2008. He also worked as a chair of the Human Factors Division (HFD) of American Nuclear Society (ANS) from 2006 to 2007. Prof. Seong is now a commissioner of Korea Nuclear Safety Commission which is the nation’s highest committee on Nuclear Safety.
2008.12.26 View 14977 -
KAIST Scientists Creates Transparent Memory Chip
--See-Through Semis Could Revolutionize Displays
A group of KAIST scientists led by Prof. Jae-Woo Park and Koeng-Su Lim has created a working computer chip that is almost completely clear -- the first of its kind.
The new chip, called "transparent resistive random access memory (TRRAM), is similar in type to an existing technology known as complementary metal-oxide semiconductor (CMOS) memory -- common commercial chips that provide the data storage for USB flash drives and other devices. Like CMOS devices, the new chip provides "non-volatile" memory, meaning that it stores digital information without losing data when it is powered off. Unlike CMOS devices, however, the new TRRAM chip is almost completely clear.
The paper on the new technology, entitled "Transparent resistive random access memory and its characteristics for non-volatile resistive switching," was published in the December issue of the Applied Physics Letters (APL), and the American Institute of Physics, the publisher of APL, issued a press release about this breakthrough.
"It is a new milestone of transparent electronic systems," says researcher Jung-Won Seo, who is the first author of the paper. "By integrating TRRAM devices with other transparent electronic components, we can create a totally see-through embedded electronic system."
Technically, TRRAM devices rely upon an existing technology known as resistive random access memory (RRAM), which is already in commercial development for future electronic data storage devices. RRAM is built using metal oxide materials between equally transparent electrodes and substrates.
According to the research team, TRRAM devices are easy to fabricate and may be commercially available in just 3-4 years.
"We are sure that TRRAM will become one of alternative devices to current CMOS-based flash memory in the near future after its reliability is proven and once any manufacturing issues are solved," says Prof. Jae-Woo Park, who is the co-author on the paper. He adds that the new devices have the potential to be manufactured cheaply because any transparent materials can be utilized as substrate and electrode. They also may not require incorporating rare elements such as Indium.
2008.12.17 View 15853 -
Prof. Cho Wins Best Paper Award
KAIST Prof. Nam-Zin Cho of the Department of Nuclear and Quantum Engineering, won the Best Thesis Award in the nuclear reactor physics category at the 2008 Winter Meeting of the American Nuclear Society held on Nov. 9-13 in Reno, Nevada.
His paper, entitled "Thermal Feedback Transient Analysis of a Pebble Fuel Based on the Two-Temperature Homogenized Model," was jointly authored by Hwi Yu and Jong-Un Kim under the guidance of Prof. Cho.
Prof. Cho was elected a fellow of the American Nuclear Society in 2001 and has served as the deputy editor of the Nuclear Science and Engineering, the research journal of the American Nuclear Society, since 1999.
2008.12.09 View 13301 -
2008 IEEE International Conference on Humanoid Robots Opens
The 2008 IEEE-RAS International Conference on Humanoid Robots, an international gathering to identify new research trends and technology in humanoid robotics, will open a three-day session on Monday (Dec. 1) at the Hotel Rivera and KAIST in Daejeon.
The annual conference is organized by KAIST and the Robotics and Automation Society of the Institute for Electric and Electronic Engineers, a U.S.-based international non-profit, professional organization for the advancement of technology related to electricity.
The conference is expected to draw a total of 200 robotics researchers from 19 different countries. Prof. Jun-Ho Oh, at the Department of Mechanical Engineering who led the creation of Korea"s first humanoid robot Hubo, is serving as general chair of the conference. Prof. Oh was named the host of the 2008 conference at the 2007 conference held at the Carnegie Melon University of the United States. The eight-year old conference was inaugurated in Boston in 2000.
On the opening day of Dec. 1, seven lectures will be given on diverse areas of robotics including cognitive humanoid vision, and robot vision sensor and sensing. On the subsequent two days, a total of 110 papers will be presented.
During the conference period, a variety of robots produced by six local and foreign robot makers will be on demonstration, providing opportunities for researchers and industrial robot makers to share technological ideas.
Highlights of the conference will be special lectures by world-renowned robot researchers Prof. Yoshiyuki Sankai of University of Tsukuba, who has created an exoskeletal "robot suit," and Prof. Art Kuo of Univerity of Michigan who is regarded as a leading authority in dynamic walking.
Following the conference, all participants are scheduled to tour Prof. Oh"s Hubo Lab and the Human-Robot Interaction Research Center, both located at KAIST.
2008.12.01 View 12713
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Method to Synthesize New Lithium Ion Battery Cathode Material Identified
A KAIST research team headed by Prof. Do-Kyung Kim at the Department of Materials Science and Engineering developed a technology to synthesize a new lithium ion battery spinel cathode which is regarded as a core part of hybrid and lithium battery cars.
The research was conducted in collaboration with a research team of Prof. Yi Cui at Stanford University"s Department of Chemistry. Their findings were introduced in the November issue of Nano Letters, one of the leading academic journals in nano-science.
The newly synthesized lithium ion battery spinel cathode known as spinel LiMn2O4 nanorods is attracting interests as an alternative cathode material since it is a low-cost, environmentally friendly substance for Li-ion battery cathodes. Its raw material is also highly available.
Lithium ion batteries with high energy and power density are important for consumer electronic devices, portable power tools, and vehicle electrification. LixCoO2 is a commonly used cathode material in commercial lithium iron batteries. However, the high cost, toxicity, and limited abundance of cobalt have been recognized to be disadvantageous.
2008.11.20 View 11801 -
KAIST Opens Cell Bench Research Center
KAIST opened a cell bench research center on the campus on Monday, Nov. 17, as a joint project with Samsung Electric Co. and Samsung Medical Center.
On hand at the opening ceremony were about 100 persons from the three organizations, including KAIST President Nam-Pyo Suh, Samsung Electric"s Chief Technology Officer (CTO) Byung-Cheon Koh and Samsung Medical Center Vice President Hyo-Geun Lim.
The newly-opened research center will be involved in the development of individually-tailored anti-cancer medicine using bio-inspired cell chips and technologies for clinical applications. Prof. Young-Ho Cho of the Department of Bio and Brain Engineering was named director of the research center.
"Top-notch professionals from the electronic industry, academia and the medical community have gathered together to establish this research center. We expect the center will open a new path for the science and technology community and the industry to combine their strengths and develop innovative anti-cancer therapeutics," said KAIST President Nam-Pyo Suh at the opening ceremony.
"The development of bio-cell chip technology represents a new challenge for the Samsung Electric which has focused on information technologies thus far. Through cooperation with KAIST and Samsung Medical Center, we expect to be able to develop a simple and efficient cure for cancer patients," commented Samsung Electric CTO Byung-Cheon Koh.
The research center will be initially concentrating on the development of cell chips for lung cancer, one of the primary causes of death for Koreans.
2008.11.17 View 14832 -
KAIST Research Team Unveils Method to Fabricate Photonic Janus Balls
A research team led by Prof. Seung-Man Yang of the Department of Chemical and Biomolecular Engineering has found a method to fabricate photonic Janus balls with isotropic structural colors.
The finding draws attention since the newly-fabricated photonic balls may prove useful pigments for the realization of e-paper or flexible electronic displays.
The breakthrough was published in the Nov. 3 edition of the science journal "Advanced Materials." The Nov. 6 issue of "Nature" also featured it as one of the research highlights under the title of "Future Pixels."
Prof. Yang"s research team found that tiny marbles, black on one side and colored on the other, can be made by "curing" suspensions of silica particles with an ultraviolet lamp. When an electric field is applied, the marbles line up so that the black sides all face upwards, which suggests they may prove useful pigments for flexible electronic displays.
The researchers suspended a flow of carbon-black particles mixed with silica and a transparent or colored silica flow in a resin that polymerizes under ultraviolet light. They then passed the mixture through a tiny see-through tube. The light solidified the silica and resin as balls with differently colored regions, each about 200 micrometers in diameter.
Over the last decades, the development of industrial platforms to artificially fabricate structural color pigments has been a pressing issue in the research areas of materials science and optics. Prof. Yang, who is also the director of the National Creative Research Initiative Center for Integrated Optofluidic Systems, has led the researches focused on fabrication of functional nano-materials through the process of assembling nano-building blocks into designed patterns.
The "complementary hybridization of optical and fluidic devices for integrated optofluidic systems" research was supported by a grant from the Creative Research Initiative Program of the Ministry of Education, Science & Technology.
2008.11.12 View 12974 -
KAIST, KRIBB Agree to Cooperate in Research of Convergence Technologies
Oct. 15, 2008 -- KAIST and Korea Research Institute of Bioscience and Biotechnology (KRIBB) have agreed to cooperate in the research of convergence fields of biotechnology, information technology and nanotechnology.
To this end, the two institutions concluded a memorandum of understanding to create a new academia-institute cooperative model in the convergence fields on Oct. 15 in Seoul, with KAIST President Nam-Pyo Suh, KRIBB Director Young-Hoon Park and Vice Minister of Education, Science and Technology Jong-Koo Park in attendance.
Under the agreement, the two institutions will set up the tentatively-named KAIST-KRIBB BINT Convergence Institute for the development of technologies and nurturing skilled manpower in the convergence fields.
The partnership of the two institutions is expected to bring broad-based cooperation opportunities and create a massive synergy effect by combining their resources and infrastructure for the development of convergence technologies, KAIST officials said..
The proposed institute is also designed to build a world-class research hub in systems biotechnology by combining strengths of the two institutions with initiatives to achieve the Korean government"s new vision for "low carbon, green growth."
The institute will also serve as a base for domestic brain convergence by concentrating the nation"s research capacities in genetics and brain technology.
KAIST also signed a memorandum of understanding for cooperation in researches in Oriental medicine with three institutions, KRIBB, Daegu Hanny University and Korea Institute of Oriental Medicine.
The agreement calls for the four institutions to conduct joint researches in traditional sciences and Oriental medicine based on systems biology, develop manpower in related fields and share academic and research information.
The agreement is expected to provide impetus to reinforcing competitiveness in compound and convergence technologies and discover new properties in Oriental medicine, according to KAIST authorities.
2008.10.16 View 14838 -
KAIST Professor Exposes Structural Dynamics of Protein in Solution
-- Dr. Hyot-Cherl Ihee"s 3-Year Research Is Valuable in Pharmaceutical Application
Prof. Hyot-Cherl Ihee and his team at the Department of Chemistry, KAIST, has successfully unveiled the structural dynamics of protein in solution as a result of more than three years" research work.
Nature Methods, a sister publication of the authoritative science magazine Nature, published the treatise, titled "Tracking the structural dynamics of proteins in solution using time-resolved wide-angle X-ray scattering" in its Sept. 22 online edition. The research paper will be carried in the magazine"s printed version in its October edition, according to Dr. Lee who is its correspondence author.
In May 2005, Prof. Ihee successfully photographed the structural dynamics of protein in solid state and his findings were published in the Proceedings of National Academy of Science of the United States. As protein normally exists in human body in solution, not in solid state, he directed his research to developing the technology to capture protein"s dynamics in resolved state.
In July that year, Prof. Ihee succeeded in measuring the structural changes of simple organic molecules in real time. He further developed the technology to uncover the structural dynamics of hemoglobin, myoglobin and cytochrome C.
Prof. Ihee"s research, helped with the Education-Science-Technology Ministry"s Creative Research Promotion Fund, can be applied to new pharmaceutical development projects as well as nanotechnology development, according to KAIST officials.
Prof. Ihee who earned his doctorate at California Institute of Technology in 1994 began teaching at KAIST in 2003. He won the Young Scientist Award given by the Korean government in 2006.
2008.09.22 View 12583 -
KAIST Professor Finds Paradox in Human Behaviors on Road
-Strange as it might seem, closing roads can cut delays
A new route opened to ease traffic jam, but commuting time has not been reduced.Conversely, motorists reached their destinations in shorter times after a big street was closed. These paradoxical phenomena are the result of human selfishness, according to recent findings of a research team led by a KAIST physics professor.
Prof. Ha-Woong Jeong, 40, at the Department of Physics, conducted a joint research with a team from Santa Fe Institute of the U.S. to analyze the behaviors of drivers in Boston, New York and London. Their study found that when individual drivers, fed with traffic information via various kinds of media, try to choose the quickest route, it can cause delays for others and even worsen congestion.
Prof. Jeong and his group"s study will be published in the Sept. 18 edition of the authoritative Physical Review Letters. The London-based Economist magazine introduced Prof. Jeong"s finding in its latest edition.
Prof. Jeong, a pioneer in the study of "complex system," has published more than 70 research papers in the world"s leading science journals, including Nature, PNAS and Physical Review Letters. "Initially, my study was to reduce annoyance from traffic jam during rush hours," Prof. Jeong said. "Ultimately, it is purposed to eliminate inefficiency located in various corners of social activities, with the help of the network science."
The Economist article read (in part):
"...when individual drivers each try to choose the quickest route it can cause delays for others and even increase hold-ups in the entire road network.
"The physicists give a simplified example of how this can happen: trying to reach a destination either by using a short but narrow bridge or a longer but wide motorway. In their hypothetical case, the combined travel time of all the drivers is minimized if half use the bridge and half the motorway. But that is not what happens. Some drivers will switch to the bridge to shorten their commute, but as the traffic builds up there the motorway starts to look like a better bet, so some switch back. Eventually the traffic flow on the two routes settles into what game theory calls a Nash equilibrium, named after John Nash, the mathematician who described it. This is the point where no individual driver could arrive any faster by switching routes.
"The researchers looked at how this equilibrium could arise if travelling across Boston from Harvard Square to Boston Common. They analysed 246 different links in the road network that could be used for the journey and calculated traffic flows at different volumes to produce what they call a “price of anarchy” (POA). This is the ratio of the total cost of the Nash equilibrium to the total cost of an optimal traffic flow directed by an omniscient traffic controller. In Boston they found that at high traffic levels drivers face a POA which results in journey times 30% longer than if motorists were co-ordinated into an optimal traffic flow. Much the same thing was found in London (a POA of up to 24% for journeys between Borough and Farringdon Underground stations) and New York (a POA of up to 28% from Washington Market Park to Queens Midtown Tunnel).
"Modifying the road network could reduce delays. And contrary to popular belief, a simple way to do that might be to close certain roads. This is known as Braess’s paradox, after another mathematician, Dietrich Braess, who found that adding extra capacity to a network can sometimes reduce its overall efficiency.
"In Boston the group looked to see if the paradox could be created by closing any of the 246 links. In 240 cases their analysis showed that a closure increased traffic problems. But closing any one of the remaining six streets reduced the POA of the new Nash equilibrium. Much the same thing was found in London and New York. More work needs to be done to understand these effects, say the researchers. But even so, planners should note that there is now evidence that even a well intentioned new road may make traffic jams worse."
2008.09.18 View 13264 -
World Research University Heads To Discuss Global Networking at KAIST Symposium
About 70 leaders of the world"s major research universities will discuss how to strengthen and operate global networks to share faculty, students, facilities and other resources for common advancement at a symposium Monday, Sept. 8, at the Westin Chosun Hotel in Seoul organized by KAIST, Korea"s foremost institute of science and technology education and research.
Participants of the 1st International Presidential Forum on Global Research Universities are from 39 universities in 20 countries. They include nine presidents of Korean universities.
The international symposium, the first such event to be held in Korea, will proceed in five panel sessions. The subjects of each session and their keynote speakers are:
-- "Roaming Professorships: To Whose Benefit?" by Dr. John Anderson, president of the Illinois Institute of Technology, USA,-- "Dual Degree Programs: Future Potential and Challenges" by Dr. Paul Greenfield, president of the University of Queensland, Australia, -- "Sharing Facilities and Expertise" by KAIST President Nam Pyo Suh,-- "An Approach to Joint Research Ventures with NASA" by Yvonne Pendleton, NASA, and-- "Globalization through Interfacing with Existing Networking" by Dr. Lars Pallesen, rector of the Technical University of Denmark.
KAIST President Suh said of the purpose of the conference: "Research universities have become global enterprises. Collaborations that were once primarily between individual researchers are now increasingly occurring at institutional and international levels. Similarly, educating students which used to be the responsibility of a single university has now become a multi-institutional undertaking, involving many universities in different countries.
"Now leading research universities in many countries depend on the continuous supply of outstanding graduate students from the "feeder" schools of developing nations. There are concerns that the current system may not be serving the interest and need of some institutions, especially those in developing nations. This should be examined and understood to devise international mechanisms that can accentuate the positive aspects of globalization.
"Through this forum, we hope to forge an international network of universities that will strengthen the effort of individual universities and create alliance for research and education that can become a new paradigm for global collaboration."
Prime Minister Han Seung-soo will give a speech at a dinner after the conclusion of the symposium. President of the Korea International Traders Association Lee Hee-beom will make a welcoming address at the start of the conference.
Co-sponsors of the international university presidents" forum include the Dong-a Ilbo, a major national daily, and the Dong-a Science magazine.
The research universities presidential forum will be followed on Sept. 9 by an international academic workshop at KAIST"s Daejeon campus on EEWS (Energy, Environment, Water and Sustainability).
Under the theme of "Challenges as Opportunities," research teams from MIT, CalTech, the Korean Ministry of Knowledge and Economy, KAIST Institute and KAIST EEWS team will present their research results at the workshop. Major Korean businesses, including SK Energy, GS Caltex and the Samsung Group will also introduce their research programs concerning EEWS, the most pressing prblems of today"s world.
A groundbreaking ceremony will be held at the KAIST campus in the afternoon of the same day for the construction of the KI Building, which will house all the eight research institutes of KAIST. The KI for Bio Century, KI for IT Convergence, KI for Design of Complex Systems, KI for Entertainment Engineering, KI for Eco-Energy, KI for Urban Space and Systems, and the KI for Optical Science and Technology were established between 2006 and 2008. More than 230 professors from 18 departments have actively engaged in research activities in their respective fields.
KAIST will start construction of the Pappalardo Medical Center in a ceremony on Wednesday with the attendance of Mr. Neil Pappalardo, chairman-CEO of Meditech Inc. of the United States who donated $2.5 million for the project. The medical facility for KAIST students, faculty and the residents of the university area will be completed in September 2009.
The President"s Advisory Council (PAC) for KAIST will hold its 3rd general meeting on Sept. 10 to discuss KAIST"s short- and long-term strategies to become the world"s top-ranked research university. The PAC was formed in 2006 with 11 foreign and 14 domestic figures from the business and academic circles.
Foreign PAC members include John Holzrichter, president of Fannie and John Hertz Foundation; Donald C. W. Kim, chairman of AMKOR A&E, Inc.; Chong-Moon Lee, chairman of AmBex Venture Group; Byung-Joon Park, founder of Bureau Veritas CPS, Inc.; Lars Pallesen, rector of the Technical University of Denmark. PAC members have advised the KAIST president on international publicity on KAIST"s academic excellence, fund-raising, and promotion of cooperative relations with overseas institutions.
2008.09.04 View 18076
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International Workshop on Flexible Displays Held on Aug. 21-22
An international workshop on flexible displays will be held at KAIST on Aug. 21-22.
The workshop organized by Center for Advanced Flexible Display Convergence (CAFDC) in KAIST is designed to share ideas on the latest research developments and explore future trends in organic displays. Organic displays made from organic light-emitting diode (OLED) materials have recently made a real impact in consumer electronics and emerged as one of the most important technologies in the development of next-generation flexible displays.
"The workshop is expected to provide an important opportunity to showcase latest technological developments using organic light-emitting diode and examine them from the perspectives of the next-generation flexible display," said Dr. Kyung-Cheol Choi, KAIST professor of electrical engineering and computer science who heads the CAFDC.
The event will feature some of the world-renowned scholars in organic display including Prof. Stephen R. Forrest of the University of Michigan, Prof. Bernard Kippelen of Georgia Tech, and Prof. Takao Someya of the University of Tokyo, as theme presenters. It will also draw a slew of domestic scholars in the industry and academia.
2008.08.22 View 14090