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Development of a Photonic Diode with Light Speed, Single-Direction Transfer
A photonic diode using a nitride semiconductor rod can increase the possibility of developing all-optical integrated circuits, an alternative to conventional integrated circuits. Professor Yong-Hoon Cho's research team from the Department of Physics, KAIST, developed a photonic diode which can selectively transfer light in one way, using semiconductor rods. The photonic diode has a diameter of hundreds of nanometers (nm) and a length of few micrometers. This size enables its use in large-scale integration (LSI). The diode’s less sensitivity towards polarized light angle makes it more useful. In an integrated circuit, a diode controls the flow of electrons. If this diode controls light rather than electrons, data can be transferred at high speed, and its loss is minimized to a greater extent. Since these implementations conserve more energy, this is a very promising future technology. However, conventional electronic diodes, made up of asymmetric meta-materials or photonic crystalline structures, are large, which makes them difficult to be used in LSI. These diodes could only be implemented under limited conditions due to its sensitivity towards polarized light angle. The research team used nitride semiconductor rods to develop a highly efficient photonic diode with distinct light intensities from opposite ends. The semiconductor rod yields different amount of energy horizontally. According to the research team, this is because the width of the quantum well and its indium quantity is continuously controlled. Professor Cho said, "A large energy difference in a horizontal direction causes asymmetrical light propagation, enabling it to be operated as a photonic diode." He added that “If light, instead of electrons, were adopted in integrated circuits, the transfer speed would be expected as great as that of light.” The research findings were published in the September 10th issue of Nano Letters as the cover paper. Under the guidance of Professor Cho, two Ph.D. candidates, Suk-Min Ko and Su-Hyun Gong, conducted this research. This research project was sponsored by the National Research Foundation of Korea and KAIST’s EEWS (energy, environment, water, and sustainability) Research Center. Figure Description: Computer simulated image of photonic diode made of semiconductor rod implemented in an all-optical integrated circuit
2014.09.23
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Distinguished Professor Sang Yup Lee Participates in the 2014 Summer Davos Forum
Distinguished Professor Sang Yup Lee from the Department of Chemical and Biomolecular Engineering, KAIST, was invited to lead four sessions at the Annual Meeting 2014, the World Economic Forum, also known as the Summer Davos Forum, which was held in Tianjin, China, from September 10th to 12th. Two of the four sessions Professor Lee participated in were held on September 10th. At the first session entitled “Biotechnology Ecosystem,” he examined with other panelists the future of bioengineering in depth and discussed major policies and industry trends that will be necessary for the development of future biotechnologies. Professor Lee later attended the “Strategic Shifts in Healthcare” session as a moderator. Issues related to transforming the health industry such as the next-generation genomics, mobile health and telemedicine, and wearable devices and predictive analytics were addressed. On September 12, Professor Lee joined the “IdeasLab with KAIST” and gave a presentation on nanotechnology. There was a total of ten IdeasLab sessions held at the Summer Davos Forum, and KAIST was the only Korean university ever invited to host this session. In addition to Professor Lee’s presentation, three more presentations were made by KAIST professors on such topics as “Sustainable Energy and Materials” and “Next-generation Semiconductors.” Lastly, Professor Lee participated in the “Global Promising Technology” session with the World Economic Forum’s Global Agenda Council members. At this session, he explained the selection of the “World’s Top 10 Most Promising Technologies” and “Bio Sector’s Top 10 Technologies” and led discussions about the “2015 Top 10 Technologies” with the council members. The Davos Forum has been announcing the “World’s Top 10 Most Promising Technologies” since 2012, and Professor Lee has played a key role in the selection while working as the Chairman of Global Agenda Council. The selection results are presented at the Davos Forum every year and have attracted a lot of attention from around the world.
2014.09.15
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Extracting Light from Graphite: Core Technology of Graphene Quantum Dots Display Developed
Professor Seokwoo Jeon of the Department of Materials Science and Engineering, Professor Yong-Hoon Cho of the Department of Physics, and Professor Seunghyup Yoo of the Department of Electrical Engineering announced that they were able to develop topnotch graphene quantum dots from graphite. Using the method of synthesizing graphite intercalation compound from graphite with salt and water, the research team developed graphene quantum dots in an ecofriendly way. The quantum dots have a diameter of 5 nanometers with their sizes equal and yield high quantum efficiency. Unlike conventional quantum dots, they are not comprised of toxic materials such as lead or cadmium. As the quantum dots can be developed from materials which can be easily found in the nature, researchers look forward to putting these into mass production at low cost. The research team also discovered a luminescence mechanism of graphene quantum dots and confirmed the possibility of commercial use by developing quantum dot light-emitting diodes with brightness of 1,000 cd/m2, which is greater than that of cellphone displays. Professor Seokwoo Jeon said, “Although quantum dot LEDs have a lower luminous efficiency than existing ones, their luminescent property can be further improved” and emphasized that “using quantum dot displays will allow us to develop not only paper-thin displays but also flexible ones.” Sponsored by Graphene Research Center in KAIST Institute for NanoCentury, the research finding was published online in the April 20th issue of Advanced Optical Materials. Picture 1: Graphene quantum dots and their synthesis Picture 2: Luminescence mechanism of graphene quantum dots Picture 3: Structure of graphene quantum dots LED and its emission
2014.09.06
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2014 NEREC Conference on Nuclear Nonproliferation: July 31-August 1, 2014, Seoul
The Nonproliferation Education and Research Center (NEREC) at KAIST hosted an international conference on nuclear nonproliferation on July 31-August 1, 2014 in Seoul. The Ministry of Science, ICT and Future Planning, the Korean Nuclear Safety and Security Commission, and the Korea Nuclear Policy Society (KNPS) sponsored the event. Over one hundred experts and "thought leaders" in nuclear security and nonproliferation attended the conference and discussed issues related to the nonproliferation of nuclear weapons, the role of scientific community in mitigating nuclear threat and promoting the peaceful use of nuclear power, and nuclear disarmament policy. Keynote speakers were: Steven E. Miller, Director of International Security Program at Belfer Center for Science and International Affairs, Harvard University; Scott D. Sagan, Senior Fellow of the Center for International Security and Cooperation, Freeman Spogli Institute for International Studies, Stanford University; Mark Fitzpatrick, Director of the Nonproliferation and Disarmament Programme, International Institute for Strategic Studies; Sang-Hyun Lee, Director of Security Strategy, Sejong Institute; and Man-Sung Yim, Professor of Nuclear and Quantum Engineering, KAIST. At the conference, Professor Yim, Director of KAIST NEREC said, “Korea has grown to become a key player in the development of commercial nuclear energy over the past decades. We hope that our conference encourages Korea to be more involved in the efforts of the international community to enhance the global nonproliferation regime.”
2014.08.05
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A KAIST startup, YBrain, builds a wearable device to cure Alzheimer's
A group of KAIST graduates from the Departments of Bio and Brain Engineering, Computer Science, Materials Science Engineering, and Industrial Design created a startup called YBrain (http://ybrain.com/). YBrain develops a wearable neuroscience technology to treat or reduce the symptoms of degenerative brain diseases such as dementia and Alzheimer’s. Their recent technological developments were covered in e27, one of the leading blogs based in Singapore. The blog covers topics like the latest technology innovation, startups, and entrepreneurship in Asia. A news article follows below: e27, June 24, 2014 “This wearable tech may be able to combat effects of Alzheimer’s” http://e27.co/this-wearable-tech-may-be-able-combat-effects-of-alzheimers-20140624/
2014.06.25
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KAIST doctoral student wins prize at 2014 International Military Science and Technology Fair
Min-Kyu Yoo (far left), a doctoral student in the Department of Materials Science Engineering, KAIST, received a silver prize at the 2014 International Military Science and Technology Fair held from May 29 to June 1, 2014 at KINTEX, Ilsan City, Korea. Yoo presented a paper on aluminum composite materials that were reinforced by carbon nanotubes. Carbon nanotubes reinforced aluminum composite materials have strong mechanical properties, and some nations have used them to manufacture battle tanks. Aluminum generates hydrogen in an alkaline solution. Utilizing this property and the galvanic corrosion of carbon nanotubes and aluminums, Yoo developed a hydrogen energy system that is fueled with composite materials of carbon nanotube reinforced aluminum. He produced 5 kW electric power and maintained it 22 days using 10 kg of the composite materials for a proton exchange membrane fuel cell and its auxiliary power system. Yoo’s research will alleviate the difficulty of transporting fuels during wartime and can be applied to the development of an auxiliary power system for next generation aircrafts and battle tanks.
2014.06.24
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KAIST's graduate, the first Ph.D. holder in games, is appointed professor at Michigan State University in East Lansing
Dr. Tae-Woo Park The academic community recognizes the study in games as a field for research Dr. Tae-Woo Park, a graduate of KAIST, has been appointed a professor at Michigan State University (MSU) in East Lansing. He will start working in August at the Department of Telecommunications, Information Studies, and Media, the College of Communications Arts, MSU. Dr. Park received a doctoral degree in games, the first of its kind in KAIST. His research focus is game design, research, and development. Dr. Park has strived to enhance user experience by incorporating various aspects of everyday life into games and made efforts to introduce measures limiting or preventing game addiction, a major concern among young people in South Korea. Professor Joon-Hwa Song of Computer Science at KAIST, Dr. Park's advisor, commented that "KAIST graduates have been the main actors in the development of Korea's gaming industry. Our efforts to systemize the field of games into an academic discipline have been recognized through Dr. Park's appointment." Dr. Park said that he plans "to apply mobile device and ubiquitous technology and develop games that will not only entertain users but also help them have a better life.”
2014.05.29
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Establishment Agreement for KAIST-Poongsan Future Technology Research Center
KAIST and Poongsan Corporation agreed to found the KAIST-Poongsan Future Technology Research Center and held a ceremony to sign a memorandum of understanding in front of 30 attendees including KAIST President Steve Kang and Poongsan Chairman Jin Ryu on May 27 at KAIST. The Research Center will develop basic technology in the fields of defense and high tech materials as well as build a new foundation for future Poongsan projects. Research areas include technologies for new materials, propulsion control, and defense. To further this endeavor, Poongsan Corporation will support the KAIST-Poongsan Future Technology Research Center for 3 years through an investment of USD 2.95 million, personnel, and technology. An agreement was made between KAIST and Poongsan to establish the Future Technology Research Center.
2014.05.29
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President Steve Kang Received an Honorary Degree from Fairleigh Dickinson University
At its 71st Commencement held on May 20, 2014, Fairleigh Dickinson University (FDU) in Teaneck, NJ, conferred an honorary doctorate (Doctor of Science) on President Steve Kang. FDU is President Kang’s alma mater. He received a bachelor’s degree from FDU in electrical engineering in 1970. For details, please refer to the press statement released by FDU on May 20, 2014. Fairleigh Dickinson University holds 71st Commencement on May 20 During the Commencement ceremony, the University will confer honorary degrees on Joyce Carol Oates, Rachel Robinson, and Sung Mo “Steve” Kang (BSEE’70). http://inside.fdu.edu/prpt/71st_commencement.html
2014.05.25
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KAIST Conducts Safety Awareness Campaign for Research and Experiment
KAIST had an opening ceremony to hold its first “Safety Awareness Campaign for Research and Experiment” on 13th May. Over 100 people attended the ceremony, including President Steve Kang, Provost Gyu-Ho Park, and the Dean of the Administration Office Jae-Nam Lee, as well as the Chief of the Department of Research Environment Safety from the Ministry of Science, ICT and Future Planning, Republic of Korea. On the day of the event, Year 2014 was proclaimed as the first year of accident-free KAIST research and laboratory facilities. A certificate of merit was awarded to promote safe and comfortable research environments. The Department of Civil and Environmental Engineering, KAIST, was selected as the department with the best lab safety management and the Department of Mechanical Engineering as the second. Along with the merit award ceremony, the results of the “7th Research and Laboratory Safety Campaign Contest” were announced: “Lady First When Dating, Safety First When Experimenting!” written by Jong-Su Bae from the Department of Mechanical Engineering was selected as the best slogan, and Hyeon-Chae Noh from the Department of Civil and Environmental Engineering received the award for best poster. President Steve Kang said, “KAIST is constantly striving to establish a comprehensive safety management system and to promote a safe research and laboratory environment,” and “To ensure the safety of KAIST and its members, we will be as supportive as possible.” Below is the winner of the poster from the 7th Research and Laboratory Safety Campaign Contest. What Would You Rather Wear? Gloves or Bandages? Gloves worn in laboratories are protection from hazardous materials that students and researchers may come in contact with. The poster emphasizes the importance of wearing protective gloves when conducting research or experiment.
2014.05.19
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Professor Jae-Kyu Lee Elected to Head the Association for Information Systems
Jae Kyu Lee, HHI (Hyundai Heavy Industries, Co., Ltd.) Chair Professor, College of Business at KAIST, was elected to lead the world major academic society, Association for Information Systems (AIS), from July 2015 to June 2016. Professor Lee will be the first Korean to serve the organization as president. From July 2014 to June 2015, he will serve as president-elect. Currently, Professor Lee is the Director of EEWS (Energy, Environment, Water, and Sustainability) Research Center at KAIST, focusing on research and development in finding solutions to critical issues facing humanity. He also played a pivotal role in the conclusion of a memorandum of understanding between HHI and KAIST in June 2013 to establish HHI-KAIST EEWS Research Center within the KAIST campus. The AIS is the premier professional association for individuals and organizations who lead the research, teaching, practice, and study of information systems worldwide. A news article on his appointment: Asian Scientist, May 16, 2014 Korean Engineer To Lead The Association For Information Systems http://www.asianscientist.com/academia/korean-engineer-lead-association-information-systems-2014/
2014.05.19
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Dr. Sung-Gu Kim of KARI receives the 10th KAIST Jung-Hun Cho Academic Award
KAIST President Steve Kang awarded the 10th "KAIST Jung-Hun Cho Academic Award" to Dr. Sung-Gu Kim of Korea Aerospace Research Institute (KARI) along with Byeong-Sup Park, a graduate student of KAIST Aerospace Engineering, Hee-Won Chae of Korea University, and Jin-Hyung Noh of Kongju National University High School on May 13, 2014. Dr. Sung-Gu Kim was recognized for his development of a 30-ton class reproduction cooling burner and the securing of essential factor technology for liquid-fuel rocket engines on the Naro project. The KAIST Jung-Hun Cho Academic Award was established to commemorate Jung-Hun Cho who was killed while researching in the rocket laboratory on May 13, 2003. From 2005, young scientists from the Aerospace Engineering field have been recognized every year. One student each from KAIST, Korea University, and Kongju National University High School, where the honorary doctorate Dr. Cho attended, has been chosen as a scholarship recipient. The KAIST Jung-Hun Cho Academic Award was established with USD 460,000 in funds donated from Cho's family.
2014.05.17
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