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Prof. Song Develops Nano-Structure to Enhance Power of Rechargeable Lithium-ion Battery
A team of scientists led by Prof. Hyun-Joon Song of the Department of Chemistry, KAIST, developed a nano-structure that could increase the power of rechargeable lithium-ion batteries, university sources said on Monday (Feb. 16). The research team found that a nano-structured material using copper oxide (CuO) could produce lithium-ion batteries with some 50 percent more capacity than conventional products. The study was published in the online edition of peer-review journal Advanced Materials. In rechargeable lithium-ion batteries, lithium ions move between the battery"s anode and cathode. The high-energy density of the batteries led to their common use in consumer electronics products, expecially portable devices. Their demand in automotive and aerospace applications is growing, and nano-structured, or nano-enabled batteries are emerging as the new generation of lithium-ion batteries for their edge in recharging time, capacity and battery life. Graphite has been a popular material for cathodes in lithium-ion batteries. However, graphite cathodes are also blamed for lost capacity due to their consumption of lithium ions, which are linked to shorter battery life. As such, scientists have been looking for materials that could replace graphite in cathodes, and silicon and metal oxide have been studied as possible alternatives.
2009.02.17
View 10244
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 10535
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 12909
KAIST Team Identifies Nano-scale Origin of Toughness in Rare Earth-added Silicon Carbide
A research team led by Prof. Do-Kyung Kim of the Department of Materials Science and Engineering of KAIST has identified the nano-scale origin of the toughness in rare-earth doped silicon carbide (RE-SiC), university sources said on Monday (Oct. 6). The research was conducted jointly with a U.S. team headed by Prof. R. O. Ritchie of the Department of Materials Science and Engineering, University of California, Berkeley. The findings were carried in the online edition of Nano Letters published by the American Chemical Association. Silicon carbide, a ceramic material known to be one of the hardest substances, are potential candidate materials for many ultrahigh-temperature structural applications. For example, if SiC, instead of metallic alloys, is used in gas-turbine engines for power generation and aerospace applications, operating temperatures of many hundred degrees higher can be obtained with a consequent dramatic increase in thermodynamic efficiency and reduced fuel consumption. However, the use of such ceramic materials has so far been severely limited since the origin of the toughness in RE-SiC remained unknown thus far. In order to investigate the origin of the toughness in RE-SiC, the researchers attempted to examine the mechanistic nature of the cracking events, which they found to occur precisely along the interface between SiC grains and the nano-scale grain-boundary phase, by using ultrahigh-resolution transmission electron microscopy and atomic-scale spectroscopy. The research found that for optimal toughness, the relative elastic modulus across the grain-boundary phase and the interfacial fracture toughness are the most critical material parameters; both can be altered with appropriate choice of rare-earth elements. In addition to identifying the nano-scale origin of the toughness in RE-SiC, the findings also contributed to precisely predicting how the use of various rare-earth elements lead to difference in toughness. University sources said that the findings will significantly advance the date when RE-SiC will replace metallic alloys in gas-turbine engines for power generation and aerospace applications.
2008.10.08
View 12191
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 12432
Super-Fast Internet Data Chip Developed
A KAIST research team led by Prof. Kyoung-Hoon Yang of the Electrical Engineering & Computer Science Department developed a super-fast chip that could lead to huge advancements in broadband Internet technology, the Korean Ministry of Education, Science and Technology said on Thursday (June 26). The multiplexer chip is the first of its kind to be developed using the quantum effect of resonant tunnelling diode, according to the Ministry. The integrated circuit chip built at the university laboratory has an operating speed of 45 gigabits per second (Gb/s), while using roughly 75 percent less energy than the previous version. The speed enables the transfer of about 4 full-length movies in one second. The best operational broadband Internet services provide users with data transfer speed of 40 Gb/s, while most other high-speed online connections offer 10 Gb/s. "Besides speed, the greatest achievement is low energy use," Prof. Yang said. He stressed that energy use in chips is a crucial factor because power creates heat that can melt circuits and make them inoperable. "By cutting down on energy use, the new chips can be made smaller and with faster data transfer speed," the scientist said. He added that efforts are underway to increase operational speed to 100 Gb/s, with energy consumption to be cut to 10 percent of current chips like the high electron mobility transistor, the heterojunction bipolar transistor and the complementary metal oxide semiconductor. The researcher speculated that such revolutionary chips could be developed in 1-2 years and become the new benchmark in this field since existing chips have limited development capabilities. The project has received funding from the Education-Science-Technology Ministry since 2000. The Ministry"s financial support will last until 2010.
2008.06.26
View 10715
World Micromachine Summit to Open in Daejeon
The 2008 World Micromachine Summit will be held at Hotel Riviera in Daejeon for a four-day run from April 30, drawing worldwide industrial and academic leaders in the micro-nano-technology (MNT). Organizers say that 76 delegates and 56 observers from 19 countries and regions will take part in this year"s Micromachine Summit. Prof. Cho Young-ho of the Department of Bio & Brain Engineering of KAIST will play host to the annual event. Participants will discuss the progress of micro-nano-technology in each country and region development of national policies in this area. The Summit was first organized in 1995 by the Micromachine Center of Japan with representatives from 10 countries participating. They were Australia, Canada, Germany, Italy, Japan, the Netherlands, Switzerland, the United Kingdom, and the United States. Korea was first invited to the conference in 1999. Since then, Korea has played an active role in promoting technological exchanges among nations and has conducted presentations and discussions on major technological breakthroughs. During the four-day run, each delegation will outline their country"s policies and strategies and present local features on focused areas including this year"s main theme, "Micromachine towards Technology Convergence Era." The gathering will offer a valuable opportunity for the participants to exchange and collect information on the current state of the MNT, as well as providing a forum for worldwide networking of leaders in the area.
2008.04.29
View 10811
2008 Commencement Ceremony Held
The 2008 KAIST Commencement Ceremony was held on Feb. 29 at the KAIST Amphitheater in the presence of KAIST President Nam Pyo Suh, U.S. Ambassador to Korea Alexander Vershbow, alumni representatives and parents. Other dignitaries on hand included National Assemblymen Sang-Kee Suh, Chang-Sun Hong and Sang-Min Lee; and Daejoen City Major Sung-Hyo Park. President Suh and Vice President Soon-Heung Chang presented degrees to each of the 1,321 graduates (200 doctors, 725 masters and 396 bachelors) instead of just to representatives. Since its inception in 1971, KAIST has produced 7,067 Ph.D. graduates, 18,636 master"s degree holders and 8,998 bachelor"s degree holders. This year, 40 percent of the Ph.D. graduates, 79, were in their twenties upon graduation. President Suh called on the graduates to return the favor they received from society by making their share of contributions to humanity. "You were chosen to be students of this unique university because the Korean people -- not only KAIST professors and staff, but also ordinary taxpayers -- believe that outstanding young people like you can change the world in which we live for the better. Now it is time for you to pay back their support," he said. Notable graduates of this year include So-Yeon Yi, 29, the first Korean female astronaut candidate, who earned her doctorate degree in bio and brain engineering. She was granted a special award in recognition of her role in advancing space science in Korea but she could not attend the graduation ceremony due to her training schedule in Russia which will continue until April. Eun-Gyu Oh, 26, was the youngest doctorate recipient in the ceremony and Won Hye-jeong, 21, recorded the top undergraduate GPA with a score of 4.20 over 4.3. Civil and environmental engineering major Seung-Hee Park, 28, published a total of eight papers in major international journals while attending KAIST and two more papers are currently under review. So-Yeon Yi said: ``I frequently stayed up all night to research and write the paper. It was tough experience for me. Thanks to ceaseless support from professors and colleagues, however, I was able to complete the task,"" she said. ``I have done my best in studying, exercising and so on. I"m sure that my active, participatory attitude brought about this honorable moment."" She is now training at Gagarin Cosmonaut Training Center near Moscow as a replacement astronaut in case Koh San, 31, who is to be the first Korean astronaut, is unable to go into orbit. Koh and Yi were selected from more than 36,000 applicants last year. Koh was finally picked as the primary candidate last September. The two are serving as space ambassadors appointed by the Ministry of Science & Technology.
2008.03.09
View 12583
KAIST, Nokia Launch Joint Research Project
Prof. Kyung Wook Baik of KAIST and his research team in the Department of Materials Science and Engineering announced the launch of a joint research project with Nokia, the world"s leading mobile phone supplier, on Jan. 24. It is the first time that Nokia runs a joint research project with a Korean university or research institute. Under the agreement, KAIST will develop a new ultrasonic welding process to bond various modules for mobile phones. The ultrasonic welding process, an indigenous technology patented by the research team led by Prof. Baik, is expected to contribute greatly to improving productivity in manufacturing mobile phones, as well as making it smaller and lighter. The research period is six month and the project fund amounts to 35,000 euros.
2008.01.29
View 10389
Int'l Herald Tribune Carries Feature Story on KAIST
International Herald Tribune carried a feature story on KAIST"s ongoing reform efforts on the front page of its Jan. 19-20 edition. The following is the full text of the report. http://www.iht.com/articles/2008/01/18/asia/school.php South Korean science prepares to take on the world By Choe Sang-Hun Friday, January 18, 2008 DAEJEON, South Korea: In Professor Cho Dong Ho"s laboratory at Kaist, South Korea"s top science and technology university, researchers are trying to develop technology that could let you fold a notebook-size electronic display and carry it in your pocket like a handkerchief. It"s too early to say when something like this might be commercially available. But the experiment has already achieved one important breakthrough: it has mobilized professors from eight departments to collaborate on an idea proposed by a student. This arrangement is almost unheard of in South Korea, where the norm is for a senior professor to dictate research projects to his own cloistered team. But it"s only one change afoot at this government-financed university, which has ambitions to transform the culture of South Korean science, and more. "When we first got the student"s idea on what a future display should look like, we thought it was crazy, stuff from science fiction," said Cho, director of Kaist"s Institute for Information Technology Convergence. "But under our new president, we are being urged to try things no one else is likely to." That university president is Suh Nam Pyo, 71, a mechanical engineer who used to be an administrator at the Massachusetts Institute of Technology and who is spearheading closely watched changes that are expected to have ramifications far beyond this campus 90 minutes by car south of Seoul. His moves so far, from requiring professors to teach in English to basing student admissions on factors other than test scores, are aimed at making the university, and by extension South Korean society, much more competitive on a world scale. When the South Korean government hired Suh in 2006 to shake up the state-financed Korean Advanced Institute of Science and Technology (which formally changed its name to its acronym, Kaist, on Jan. 1) the country"s leading schools faced a crisis. The old system, which guaranteed free tuition to lure promising students into science and technology, the drivers of South Korea"s industrial growth, was no longer working as well as it used to. Prosperity was allowing those young people to choose fields of study once viewed as luxuries, like literature and history. Worse, increasing numbers were choosing to study abroad, mostly in the United States, and then not returning home. The fear was that South Korean institutions and enterprises would be gutted of expertise. That concern was voiced at a news conference Monday by the president-elect, Lee Myung Bak, who said the educational system "isn"t producing talent that can compete globally." Kaist, which was established in 1971 with foreign aid, has a special place in South Korean education. The military strongman Park Chung Hee recruited the brightest young people to train there as scientists and engineers. Villagers put up a large banner to celebrate whenever a local child was admitted. "When I was a student here in the mid-1980s, some students stopped before the national flag at the library in the morning and observed a moment of silence, vowing to dedicate ourselves to the nation"s industrial development," said Cho Byung Jin, a professor of electrical engineering. Since his arrival, Suh has become the most talked-about campus reformer in South Korea by taking on some of Kaist"s most hallowed traditions. In a first for a Korean university, Suh has insisted that all classes eventually be taught in English, starting with those aimed at freshmen. "I want Kaist students to work all over the world," Suh said last week. "I don"t want them to be like other Koreans who attend international conferences and have a lunch among themselves because they are afraid of speaking in English." The move to English supports another of his changes: opening undergraduate degree programs to talented non-Koreans. Last year Kaist filled 51 of its 700 admission slots with foreign students on full scholarships. Meanwhile, he has ended free tuition for all; any student whose grade average falls below a B must pay up to $16,000 a year. "My dream is to make Kaist a globalized university, one of the best universities in the world," he said. In what may have been his most daring move, the university denied tenure to 15 of the 35 professors who applied last September. Until then, few if any applicants had failed tenure review in the university"s 36-year history. In this education-obsessed country, Suh"s actions have been watched intensely for their broader impact. More than 82 percent of all high school graduates go on to higher education. What university a South Korean attends in his 20s can determine his position and salary in his 50s, a factor behind recent expos?of prominent South Koreans who faked prestigious diplomas. The system is widely deplored but seldom challenged. From kindergarten, a child"s life is shaped largely by a single goal: doing well in examinations, particularly the all-important national college entrance exam. High school students plod through rote learning from dawn to dusk. Tutoring by "exam doctors" is a multibillion-dollar industry. During vacations, students attend private cram schools, which numbered 33,000 in 2006. One result is a disciplined and conformist work force, an advantage when South Korea rapidly industrialized by copying technology from others. But now, with the country trying to climb the innovation ladder, the rigid school system is proving a stumbling block. The nation"s highly hierarchical ways are often cited to explain how Hwang Woo Suk, the disgraced South Korean scientist who claimed he had produced stems cells from a cloned human embryo, could fabricate research findings with the complicity of junior associates. The ambitious head overseas. Last year, 62,392 South Korean students were enrolled in U.S. colleges and universities, making them the third-largest foreign student group, after Indians (83,833) and Chinese (67,723), according to the U.S. Institute of International Education. Some start earlier. About 35,000 South Korean children below college age go abroad each year, most to the United States to learn English. Against this backdrop, Kaist has been experimenting with test-free admissions. For this year"s class, it brought applicants in for interviews and debates and make presentations while professors looked for creativity and leadership. "About 20 percent of the students who formerly would have won admission didn"t make it under our new guidelines," Suh said. "We are looking for rough diamonds." Challenging the status quo can be risky. The Science and Technology Ministry, which oversees Kaist, had first looked outside South Korea for someone to lead the changes, choosing the Nobel physics laureate Robert Laughlin, who became the first foreigner to head a South Korean university in 2004. But he returned to Stanford University within two years, after the faculty rebelled against him for attempting some of the same changes Suh has instituted, accusing him, among other things, of insensitivity to Korean ways. Suh"s Korean roots and experience shield him from such charges. He did not emigrate to the United States until he was 18 and has worked at Korean universities as well as serving as assistant director at the U.S. National Science Foundation in the 1980s and head of MIT"s department of mechanical engineering from 1991 to 2001. "Reform entails sacrifices, but even if we don"t reform, there will be sacrifices," Suh said. "The difference is that if we don"t reform and don"t encourage competition, it"s the best people who are sacrificed." So far, Suh"s innovations have mostly received favorable reviews. Education Minister Kim Shi Il called them a "very desirable way of making Korea"s universities more competitive globally." The newspaper JoongAng Daily (which publishes an English-language version in partnership with the IHT) praised him for "smashing the iron rice bowls" (ending guaranteed job security) for professors and said, "We must learn from Kaist." Ewan Stewart, a British physicist who has taught at Kaist since 1999, said, "Many of the things President Suh is saying were things I felt should have been said a long time ago." Chung Joo Yeon, a first-year student, said she accepted the need for classes in English, but complained that some professors had no experience teaching in the language. But Cho, the electrical engineering professor, said: "It"s no longer a matter of choice. If we want to maintain our school"s standards, we must draw talents from countries around the world, and that means we must conduct our classes in English." Meanwhile, Lee has promised that as president he will give universities more autonomy by taking the "government"s hands off" how they select their students.
2008.01.23
View 13691
Three Professors Selected as IEEE Fellows
Three Korea Advanced Institute of Science and Technology (KAIST)’s professors, Ju-Jang Lee, Yong-Hee Lee, and Hoi-Jun Yoo, were selected as a part of the 2008 Institute of Electrical and Electronics Engineers, Inc (IEEE)’s “Fellows.” A Fellow is the highest level of membership given only to those “with an extraordinary record of accomplishments” in their field of study. Although some IEEE memberships can be gained freely by all, the Fellow status is bestowed only by the IEEE Board of Directors. Professor Ju-Jang Lee was awarded the Fellow status “for contributions to intelligent robust control and robotics.” Robust control is a system’s stable maintenance under many inputs in a dynamic environment. A part of KAIST’s Electrical Engineering Department, Professor Ju-Jang Lee has conducted successful research in these fields, and has published 538 papers. He also holds many patents in and outside of the country, and is the General Chair for two upcoming IEEE conferences in 2008 and 2009. Professor Yong-Hee Lee of KAIST’s Physics Department was recognized for his “contributions to photonic devices based upon vertical cavity surface emitting lasers and photonic crystals.” Photonic devices are those that allow the practical use of photons, and photon crystals are structures that affect the motion of photons. Professor Yong-Hee Lee is an expert in the field of Photonics and his works have been cited over 2500 times. He is also an outstanding speaker, giving over 30 lectures in front of international audiences in the past 5 years, and receiving The Distinguished Lecturer’s Award from IEEE. Professor Hoi-Jun Yoo was granted the prestigious Fellow status for his “contributions to low-power and high-speed VLSI design.” VLSI stands for ‘very large scale integration’ and refers to the skill for packing a huge number of semiconductors on an integrated circuit. Professor Lee’s Fellow status is noteworthy in that he studied, worked, and researched solely in Korea. He is also the youngest of the three KAIST professors to be granted membership in the class of 2008 Fellowship. IEEE also recognized Professor Yoo as the most frequent publisher during the past 8 years. IEEE, originally concentrating on Electric Engineering, has now branched into many related fields. It is a nonprofit organization, and its aim is to be the world"s leading professional association for the advancement of technology. For its Fellow Class of 2008, 295 members were chosen; which is less that 0.1% of their total members.By KAIST Herald on December, 2007
2007.12.21
View 14945
KAIST Graduate Selected As Winner of IEEE Outstanding Young Engineer Award
- First Korean winner of IEEE Outstanding Young Engineer Award Dr. Myung-Jin Rhim, Bachelor, Master, and Ph.D of KAIST, has been selected to receive 2007 Outstanding Young Engineer Award by the Institute of Electrical and Electronics Engineers (IEEE) Components, Packaging, and Manufacturing Technology (CPMT) Society. Dr. Rhim will be the first Korean winner of the award. Dr. Rhim received his Ph.D of Materials Science & Engineering at KAIST in 2001 and has made outstanding research outputs, such as 28 papers at international journals covered by Science Citation Index (SCI) and 12 international patents. He has been also listed in Marquis Who’s Who in the World, Who’s Who of Emerging Leaders, Who’s Who in Asia, and Outstanding Intellectual of the 21st Century, 21st Century Award for Achievement published by the International Biographical Centre of Cambridge, England. IEEE CPMT Society has yearly awarded the Outstanding Young Engineer Award to a scientist or engineer of electronic components, packaging, and manufacturing technology prior to his or her 35th birthday in recognition of his or her research achievements. Dr. Rhim is now in his postdoctoral program at Georgia Institute of Technology in USA.
2007.06.14
View 13479
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