본문 바로가기
대메뉴 바로가기
KAIST
Newsletter Vol.25
Receive KAIST news by email!
View
Subscribe
Close
Type your e-mail address here.
Subscribe
Close
KAIST
NEWS
유틸열기
홈페이지 통합검색
-
검색
KOREAN
메뉴 열기
Seong
by recently order
by view order
"Supersolidity flows back," Nature, September 2, 2010
Supersolidity, discovered for the first time in 2004 by two physicists—one of them is Professor Eun-Seong Kim from the Department of Physics, KAIST—was discussed once again in the September 2, 2010 issue of Nature, an internationally well-known science journal. The article mentioned “supersolidity” as one of the rare examples of quantum effects on a macroscopic scale, together with “superconductivity” and “superfluidity.” The phenomenon of supersolidity was evidenced by Professor Kim and his colleague through an experiment of placing helium-4 in a torsional oscillator under a low temperature. The phenomenon, however, has been in debate among scientists in the physics community since the discovery, and Professor Kim has recently released his research results to further support his claim. For the full article, please click the link below: http://www.nature.com/news/2010/100902/full/news.2010.443.html.
2010.09.08
View 8897
Science News Issued on September 11, 2010: A matter of solidity
Science News, a bi-weekly news magazine of the Society for Science & the Public, published an extensive article on the issue of “supersolidity” discovered in helium-4. Professor Eun-Seong Kim of the Physics Department, KAIST, is one of the scientists who discovered the phenomenon through an experiment of solid helium using a device called a torsional oscillator. For the entire article, please click the link of http://www.sciencenews.org/view/feature/id/62642/title/A_matter_of_solidity.
2010.09.02
View 9816
Professor Eun-Seong Kim and his research staff observed the phenomena of hysteresis and relaxation dynamics from supersolid Helium
Professor Eun-Seong Kim and his research staff observed the phenomena of hysteresis and relaxation dynamics from supersolid Helium. Their research paper was published in Nature Physics for the issue of April 2010. If we take Helium 4 and cool it down at temperatures below 2.176 Kelivin, liquid helium 4 undergoes a phase transition and becomes superfluid with a zero viscosity. The superfluidity was observed in solid helium through an experiment performed by researchers of Pennsylvania State University in 2004. One of the researchers then was Professor Eun-Seong Kim in the Department of Physics, KAIST. Professor Kim and his research staff, Hyung-Soon Choi, Ph.D., recently published their research results in Nature Physics (April 2010), a highly esteemed journal in the field, on the phenomena of hysteresis and relaxation dynamics observed in supersolid Helium. For the paper, please download the attached .pdf file. Nature Physics link: http://www.nature.com
2010.04.13
View 11625
Prof. Woo's Team Discovers Eco-Friendly Solid-Oxide Fuel Cell System
A KAIST research team led by Prof. Seong-Ihl Woo of the Department of Chemical & Biomolecular Engineering has found a method to use glycerol, a byproduct from the production of biodiesel, as fuel for solid oxide fuel cells (SOFC), university authorities said on Tuesday (Oct. 27). The research finding shows that glycerol can be an environmentally sustainable fuel when it is used for operating SOFCs with internal reforming, instead of hydrogen and methane. The finding was published in the Oct. 14, 2009 online edition of ChemSusChem, a sister journal of Angewandte Chemie, the world"s leading chemistry journal. Biodiesel is an attractive alternative energy source because of its low sulfur content and demand is growing worldwide as oil price soars. Bio-derived glycerol will not contribute to the greenhouse effect and has the potential to contribute to reducing global warming. Currently, glycereol is used as a raw material in the cosmetic, pharmacy, food, and tobacco industries. However, its supply exceeds its demand as the volume of biodiesel production increases. The production of 1 ton of biodiesel produces 0.1 ton of glycerol. Many researchers have investigated various routes for the consumption of surplus glycerol. The research is expected to contribute to sustainable growth by reducing the emissions of carbon dioxide and reusing generated carbon dioxide for the production of biomass. The new method enables manufacturers to use glycerol as a fuel for operating SOFC.
2009.10.28
View 11859
Prof. Cho's Team Awarded Best Paper Prize by IEEE
A team led by Prof. Seong-Hwan Cho of the School of Electrical Engineering and Computer Science, KAIST, won the 2009 Guillemin-Cauer Best Paper Award for their paper published in the IEEE Transactions on Circuits and Systems Journal last May, university authorities said on Thursday (June 4). The team"s paper was entitled "A Time-based Bandpass ADC Using Time-Interleaved Voltage-Controlled Oscillators." The prize is given to a paper regarded as the best among about 350 papers published in the prestigious journal in the circuit theory area. Co-recipients of the award are Young-Gyu Yoon, Jae-Wook Kim and Tae-Kwang Jang. The award was presented at the annual 2009 International Symposium for Circuits and Systems in Taipei, Taiwan, on May 26. The Institute of Electrical and Electronics Engineers or IEEE is an international non-profit, professional organization for the advancement of technology related to electricity. The New York-based organization has more than 365,000 members in about 150 countries making it the largest technical professional organization in the world.
2009.06.05
View 12361
Workshop on Biomedical IC to Be Held on March 26
KAIST will hold a workshop on "biomedical IC for future healthcare system" on March 26 at a lecture room of the School of Electrical Engineering & Computer Science. The workshop is organized by SEECS and the Korean Institute of Next Generation Computing. At the workshop, a variety of new technologies expected to expedite the development of biomedical systems will be presented. KAIST Prof. Hoi-Jun Yoo will speak on the "body channel communication" using the human body as the signal transmission medium and Dr. Seung-Hwan Kim of Electronics and Telecommunications Research Institute (ETRI) on a wearable vital sign monitoring system. Other subjects are CMOS (complementary metal-oxide semiconductor) fully electronic biosensor for biomolecular detection to be presented by KAIST Prof. Gyu-Hyeong Cho; nerve interface and IC (integrated circuit) system design by KAIST Prof. Yoon-gi Nam; design of neural recording and stimulation IC using time-varying magnetic field by KAIST Prof. Seong-Hwan Cho; low power multi-core digital signal processor for hearing aid by Dong-Wook Kim, senior researcher at the Samsung Advanced Institute of Technology; and a non-contact cardiac sensor by KAIST Prof. Seung-Chul Hong. With the advent of the ageing society, medical expenses of the elderly people are rapidly increasing. As a way to address the issue, interests are growing in "ubiquitous healthcare," a technology that uses a large number of environmental and patient sensors and actuators to monitor and improve patients’ physical and mental condition. The upcoming workshop is the first academic event on biomedical integrated chips to be held in Korea. The workshop will provide a valuable opportunity for experts in biomedical area to get together and examine the present status of Korean biomedical area and discuss about its future, KAIST officials said.
2009.03.20
View 16097
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 14377
Satellite Research Lab Named After Late Hyundai Chairman Chung
KAIST, Aug. 11, 2008 -- KAIST held a naming ceremony for a research lab which was named after the late Hyundai Asan Chairman Mong-Hun Chung on Monday (Aug. 11) at the KAIST Satellite Technology Research Center. During the ceremony, a seminar room was also named after Dr. Soon-dal Choi, President of Daeduk College, for his distinguished contributions to the development of Korean space science. Back in 1992, the late chairman Chung donated 3.4 billion won (US$3.4 million) to KAIST to build a satellite laboratory for the development of core space technologies and the nurturing of skilled manpower. The naming ceremony was held in commemoration of the 16th anniversary of the launch of Korea"s first small satellite "Uribyeol 1" on Aug. 11, 1992. Chung died in 2003. Dr. Soon-Dal Choi who laid the ground work for Korea"s space development program, served as the inaugural director general of the KAIST Satellite Technology Research Center, the birthplace of Korea"s artificial satellite. On hand at the naming ceremony were a slew of dignitaries including Jeong-Eun Hyun, Hyundai Group Chairwoman and wife of the late Chung; and about 10 chief executives of Hyundai Group companies; Seong-Hyo Park, Mayor of the Daejeon Metropolitan City; Ms. So-Yeon Lee, Korea"s first astronaut; and KAIST President Nam-Pyo Suh. President Suh noted that late Chairman Chung made great contributions to Korea"s artificial satellite development with his donation to the satellite laboratory. He said Dr. Choi is the father of the nation"s satellite program who provided the vision of space development in Korea at a time when Korea lagged behind in the artificial satellite technology.
2008.08.12
View 14089
Prof. Kim Receives Lee Osheroff Prize
Professor Eun-Seong Kim of the Department of Physics has been selected as the winner of the Lee Osheroff Richardson Prize for 2008. The award was established in honor of the 1996 Nobel Prize laureates in Physics David Lee, Douglas Osheroff, and Robert Richardson for their discovery in superfluidity in helium-3. The annual prize sponsored by Oxford Instruments NanoScience is awarded to a young scientist who has made a notable achievement in the field of low temperatures and high magnetic fields. Kim was chosen as the winner of this prestigious award for his contributions to the understanding of solid helium. Through research, Professor Kim found superfluid-like behavior in solid helium and with this discovery it is shown that all three states of matter can exhibit superfluid behavior. The Lee Osheroff Richardson Prize recipient is selected by the North American Prize Committee which is composed of prominent figures in the low temperature and high magnetic fields including Professor Bruce Gaulin of McMaster University, who chairs the Prize Committee. The award ceremony was held on March 11 in New Orleans.
2008.03.18
View 12237
Research Outputs over Carbon Nanotube by Prof. Choi Selected as Research Highlight by ACS
Research Outputs over Carbon Nanotube by Prof. Choi Selected as Research Highlight by ACS Research Outputs over Carbon Nanotube by Prof. Choi Selected as Research Highlight by ACS A research team headed by Seong-Min Choi, a professor of Nuclear and Quantum Engineering, KAIST, has developed technologies to stably disperse carbon nanotube particles in aqueous solutions and organic solvents, essential for industrial applications of carbon nanotube, and discovered the dispersion characteristics of carbon nanotube. The research outputs have been published by ‘Advanced materials’ (19, 929, 2007), the most distinguished journal in Material Science field, and introduced as Research Highlight at the May 7th edition of ‘Heart Cut’ by the American Chemical Society (ACS). A number of processes for industrial applications of carbon nanotube require the dispersion of carbon nanotube in aqueous solutions or organic solvents, and thus far, surfactant particles or DNAs have been used to disperse carbon nanotube particles. However, they have shortcomings of easy destruction of dispersion. In order to overcome such shortcomings, Prof. Choi’s team produced carbon nanotube particle-dispersed aqueous solutions by using surfactant particles and then polymerized surfactant particles absorbed to the surfaces of carbon nanotube in situ to develop carbon nanotube with hydrophile and safe surfaces. The functional carbon nanotube so obtained shows features of easy dispersion in aqueous solutions and organic solvents even after being processed, such as freeze drying, therefore, is expected to significantly contribute to the development of application technologies of carbon nanotubes. Tae-Hwan Kim and Chang-Woo Doh, both doctoral students, played key roles in the researches carried out under the auspices of the Ministry of Science and Technology (MOST) as a nuclear power R&D project, and the relevant technologies were filed for patent applications. Figures: Carbon nanotube before polymerization (left), carbon nanotube polymerized with surfactant particles (right)
2007.05.14
View 12698
KNS" International Journal Registered as SCIE
KNS" International Journal Registered as SCIE International journal ‘Nuclear Engineering and Technology’, published by the Korean Nuclear Society (KNS, President Si-Hwan Kim) under the supervision of Poong Hyun Seong, a professor of Nuclear and Quantum Engineering of KAIST, has been made a member of Science Citation Index Expanded (SCIE) administrated by Thomson Scientific. Thomson Scientific has notified such decision on April 14 and revealed the actual thesis title index will officially be notified within this year.
2007.04.19
View 12095
Professor Seong-Ihl Woo Develops New High-Speed Research Method
Professor Seong-Ihl Woo Develops New High-Speed Research Method Reduce research periods and expenses for thin film materials several ten times Posted on the online version of Proceedings of National Academy of Sciences of the United States of America (PNAS) on January 9 A team led by Seong-Ihl Woo, a professor of KAIST Department of Chemical & Biomolecular Engineering and the director of the Center for Ultramicrochemical Process Systems, has developed a high-speed research method that can maximize research performances and posted the relevant contents on the online version of Proceedings of National Academy of Sciences of the United States of America (PNAS), a distinguished scientific journal, on January 9, 2007. Professor Woo’s team has developed a high-speed research method that can fabricate several tens or several thousands of thin films with different compositions (mixing ratio) at the same time and carry out structural analysis and performance evaluation more than ten times faster and accurately, which leads to the shortening of the research processes of thin film materials. This is an epoch-making method that can reduce research periods and expenses several ten times or more, compared to the previous methods. The qualities of final products of electronic materials, displays, and semi-conductors depend on the features of thin film materials. Averagely, it takes about two weeks or longer to fabricate a functional thin film and analyze and evaluate its performances. In order to fabricate thin film materials in need successfully, more than several thousand times of tests are required. The existing thin film-fabricating equipment is expensive one demanding high-degree vacuum, such as chemical vapor deposition, sputtering, physical vapor deposition, laser evaporation, and so on. In order to fabricate thin films of various compositions with this equipment, a several million won-worth target (solid-state raw material) and precursors (volatile organic metal compound) pricing several hundreds won per gram are required. Therefore, huge amount of experiment expense is demanded for fabrication of several ten thousands of thin films with various compositions. Professor Woo’s team has developed ‘combinatorial droplet chemical deposition’ equipment, which does not demand high-degree vacuum and is automated by computers and robots, by using a new high-speed research measure. The equipment is priced at about 1/5 of the existing equipment and easy for maintenance. This equipment uses cheap reagents, instead of expensive raw materials. Reagents necessary to form required compositions are dissolved in water or proper solvents, and then applied by high frequencies to make several micrometer-scaled droplets (fine liquid droplet). Theses droplets are moved by nitrogen and dropped onto a substrate, which is to be fabricated into a thin film, and then subsequent thermal treatment is applied to the substrate to fabricate a thin film of required composition. At this moment, several tens or several hundreds of thin films with various compositions can be fabricated at the same time by reducing the size of thin film specimens into millimeter scale with the use of shade mask and adjusting vaporization time with masks, the moving speed of which can be adjusted. The expenses for materials necessary for the fabrication of thin films with this equipment amount to several ten thousands won per 100 grams, which is in the range of 1/100 and 1/10 of the previous methods, and the research period can be shortened into one of several tenth. “If this new method is applied to the development of elements in the fields of core energy, material and health, which have not been discovered by the existing research methods so far, as well as researches in thin film material field, substantial effects will be brought,” said Professor Woo. ‘Combinatorial droplet chemical vaporization’ equipment is pending a domestic patent application and international patent applications at Japan and Germany. This equipment will be produced by order and provided to general researchers.
2007.02.02
View 15080
<<
첫번째페이지
<
이전 페이지
1
2
3
>
다음 페이지
>>
마지막 페이지 3