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New LEDs: Large Spectrum of Colors
Professor Yonghun Cho has discovered that LEDs with hexagonal pyramid structures can emit various colors of light.
LEDs, which have been leading the light revolution is a light emitting element that uses the characteristics of semiconductors to emit light upon passing a current, and is being used for lighting, TV, and various signaling devices.
In general, the white LED used for lighting has to be constructed by spraying yellow fluorescent material on a blue LED or by creating a complicated circuit where various LED chips function together.
Prof.Cho’s research team discovered the fact that when a small hexagonal pyramid structure is formed on the semiconductor composing the LED and a current is passed through this, then each side, edge, and point on the pyramid assumes different energies.
Due to the energy differences, lights of bluegreen, yellow, and orange were emitted from the side, edge, and points of the pyramid, respectively. This shows the prospect of displaying white light as well as that of many other colors.
Thus, applying the nanopyramidal structure to LEDs will allow the emission of light with a large spectrum with just the flow of the current, enabling a new type of LED light emitting particles that would display various colors from a single LED chip without the use of a fluorescent material.
Also, originally, LEDs have had limitations to its efficiency because of its structural characteristics where fluorescent materials had to be sprayed on, but the nanopyramidal structures will overcome this structural barrier to create brighter light
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'Scientist-Engineer of the Month' for December: Professor Choi Joon Ho
Professor Choi Joon Ho (department of Biological Sciences) was made ‘Scientist-Engineer of December’ for his discovery of new gene (twenty-four) that helps biorhythm and proving that this gene helps control biorhythm.
Professor Choi published 100 dissertations over the past 25 years and made significant advancements in the field of molecular virus and neurobiology.
In 1995 Professor Choi uncovered the fact that the NS3 protein in C type hepatitis function as RNA helicase thereby opening the path to developing a cure for C type hepatitis; this is an international patent with Chiron corporation. The result was published in Biochemical and Biophysical Research Communications Journal and was the most domestically referred to dissertation in biological sciences in 1999.
In addition Professor Choi published in Nature magazine in 1999, a dissertation that uncovered the fact that the DNA of papillomar virus has another protein (hSNF5) that direct it apart from ordinary proteins.
In 2000~2005 Professor Choi published many dissertations in journals like Immunity, Cancer Research, Molecular and Cellular Biology, Oncogene, Journal of Virology, and etc.
Professor Choi screened over 10,000 species of pomace fly mutations and discovered the twenty-four gene that affects the biorhythm of pomace flies. He analyzed this gene further and found a new function that was different from known biorhythm mechanisms.
This research allowed a better understanding of biological clock of pomace flies and therefore was another step towards better understanding the control mechanism of human biological clock.
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2011 IT Convergence International Workshop
KAIST held the 2011 IT Convergence International Workshop on Future Mobile Service & Service Technology.
The workshop was attended by Kim Byoung Il (Chairman of National Science and Technology Commission), Koichi Asatani (Professor at Kogakuin University), Jay H. Eum (representative of TransLink Capital), among 15 other experts from government, scholar, industry, and IT defense.
The keynote speaker, Chairman Kim Byoung Il, gave a speech on Industry Development Strategy for Software. Professor Koichi Asatani gave a presentation on information communication technology and future trend of future network and service. And Jay H. Eum will be giving a presentation on the technological venture firm strategy that was so successful in Silicon Valley.
There will be presentations and debate on mobile services, IT security and defense, IT convergence technology, software technology and other future IT convergence technologies.
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Professor Lee Jae Kyu : Appointed Fellow at Association of Information Systems
Professor Lee Jae Kyu of the Graduate School of Information Media Management was made Fellow of the Association of Information Systems.
Professor Less was the Chief Editor of Electronic Commerce Research and Applications, Chairman of Asia Pacific Information System Symposium, and Chairman of Korea Academy of Management Information, in addition to Chairman of the Academy of Korea Intelligence Information System.
The ‘Electronic Commerce’ co-written by Professor Lee is being used as primary MBA textbook in many universities around the world.
Homepage : http://www.business.kaist.ac.kr/faculty/jklee/
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Closer to the Dream: Graphene
A technique that allows easy and larger observation area of graphene’s crystal face was developed by Korean Research Team.
The research team, led by Professor Jeong Hui Tae (KAIST), consists of Doctorate candidate Kim Dae Woo, Dr. Kim Yoon Ho (primary author), Doctorate candidate Jeong Hyun Soo. The research is supported by WCU (World Class Research University) Development Plan, Mid-Aged Researcher Support Business and was published in the online edition of Nature Nanotechnology.
(Dissertation: Direct visualization of large0area graphene domains and boundaries by optical birefringency)
Professor Jeong’s team used the optical property of the liquid display used in LCD to visualize the size and shape of the single crystals along a flat surface. The visualization of the single crystal allowed the measurement of a near theoretical value of electrical conductivity of graphene.
Graphene has great electrical conductivity, transparent, mechanically stable, flexible, and is therefore regarded as the next generation electrical material. However the polycrystalinity of graphene meant that the actual electrical, mechanical properties were lower than the theoretical values. The reason was thought to be because of the size of the crystal faces and boundary structures.
Therefore, in order to create graphene that has good properties, observing the domain and boundary of graphene crystal faces is essential.
The new technique developed by the research team is another step towards commercializing transparent electrodes, flexible display, and electric materials like solar cells.
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MOU: KAIST-Korea Internet & Security Agency
KAIST signed a MOU with the Korea Internet & Security Agency for the development of IT and International Security.
As a result of the MOU interaction in ▲Exchange of personnel and materials for cooperative research for information protection ▲Information protection policy and technology ▲Education and training for developing information protection personnel, will be increased.
Director of Cyber Security Research Center Joo Dae Joon commented, “Cyber-attack on national infrastructure like DDOS attacks can threaten the nation’s system” and that “the two institutes will establish a response system against cyber-attacks and train experts in information protection”.
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City of McAllen, Texas Adopts OLEV Technology
KAIST will be exporting the OLEV technology to the United States for the first time since its development.
The city of McAllen of Texas will be stationing 3 OLEV buses in the 10 mile (16km) route from 2013 from OLEV Technology Corporation.
The OLEV Technology Corporation based in Massachusetts and is a venture company that KAIST has 30% share of and has the OLEV technology. The corporation has sole license in commercialization of OLEV in the United States.
The OLEV technology has been commercialized in the city of Seoul since July of 2011. But this is the first instance of foreign implementation of the OLEV technology.
The reason for the city of McAllen adopting the OLEV is because of the support of the Department of Transportation. The Department of Transportation has been supporting Green Energy Research and Future Transportation Technology Development projects since 2009.
A total of 266 research proposals were submitted in 2011 and out of that 46 were selected and given a total of 112 million USD.
Representative of McAllen city commented “the operation of OLEV buses developed by KAIST will result in decrease in energy consumption and emission of greenhouse gases. The OLEV technology can be applied to existing diesel buses and therefore has high cost efficiency”.
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Director of ELK Shin Dong Hyuk Donates 500 million Korean Won over 5 years
KAIST Alumni Director of ELK Shin Dong Hyuk Promised to donate 100million Korean Won annually for 5 years.
Director Shin commented revealed his reason for donating was, “I had received a lot of help from KAIST as a KAIST alumni and was therefore wondering what I could do to help out.” And that “I wish that the donation can help KAIST students who are experiencing financial difficulty”.
He added that, “I wish that the donation becomes the basis on which KAIST students can achieve their dreams and also KAIST students contribute back to KAIST after graduation”.
The ELK ltd. where Alum Shin Dong Hyuk is Director at is located in the DaeDuk Techno Valley and is one of the leading touch screen panel specialization companies. It has world’s best technological asset in smartphone touch screen panel production and is responsible for supplying panels for Motorola and LG Electronics, etc.
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Bio Pharmaceutical Business Center: Now Open
The Signboard Hanging Ceremony for the Bio Pharmaceutical Business Center for the Integrated Research for the field of Bio Pharmaceutics. 150 representatives from various bio pharmaceutics related businesses and institutes were present for this ceremony.
The Ministry of Education, Science and Technology placed the Molecular Process research team, Personalized Drug Delivery Medium research team, and the newly formed Cancer Cell Detection using Blood research team at the Bio Pharmaceutical Business Center at KAIST.
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KAIST to Support R&D Plans of Mid-Small Sized Enterprises
KAIST signed a MOU for the ‘Support for R&D Plans for Mid-Small Sized Firms’ with the Small and Medium Business Conference and Korea South-East Power Co. Ltd.
KAIST and Korea South-East Power Co. Ltd. will now be improving their cooperation on supporting R&D plans to help the technology development and commercialization for Small and Medium Businesses.
Korea South-East Power Co. Ltd. will now select 20 best qualified firms out of its 300 cooperating firms and suggest them as candidates to KAIST Business membership System.
The suggested firms will be given: ▲Strategy R&D Planning ▲Consult Difficult Technology ▲Provide Information on Research Labs and Researchers among other various programs.
The firms participating in the KAIST Business membership System will be able to minimize risk and increase its possibility for success on Development Technology.
KAIST Business membership System is a program provided to firms for a membership fee, in order to create technological innovation and strengthen cooperation between university and industry.
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KAIST Ocean Technology Center
The KAIST Ocean Technology Center was established and opened in Eureka hall.
The founding Center Director was given to Professor Han Soon Heung (department of Marine System and Engineering).
The newly found Center will be under the KAIST Mechanical Technology Research Center and will be actively developing ideas like deep sea marine plant, impact resistance to underwater explosion, and etc. and work to commercialize these technologies and contribute to the development of the Shipbuilding industry.
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A Step Closer to Ultra Slim Mobile Phone
Professor Baek Kyung Wook (department of Material Science and Engineering) succeeded in developing an ultra-thin conjugation technique that can perfectly replace the modular contact in electronic devices.
The research team developed a compound material using ultra-fine solder-adhesive film and developed the vertical ultrasonic conjugation process thereby making a reliable utra-thin conjugation.
The developed technique allowed for very thin and reliable conjugation and will be able to replace the socket type connector and is expected to revolutionize the electronic device industry.
In mobile electronic devices like the smartphone, the trend is to incorporate various functional modules like camera, display, touchscreens, etc. in addition to striving for miniaturization of the device.
Recently the problem was the fact that the number of modules within the device was increasing due to the incorporation of various functions, and consequently the volume that these modules took up increased as well, which made miniaturization almost impossible.
Professor Baek‘s team succeeded in improving upon this problem by creating a compound material that has ultra-fine solder particles that can melt to form alloy fusion with the electrode and thermosetting adhesive film that can wrap around the electrode and provide mechanical protection.
The use of this material made it possible to reduce the thickness of the connector by hundredth fold which improved electrical, mechanical properties and highly reliable.
From a processing standpoint the conventional conjugation process involved heating the mechanical block and was therefore hard to manage its production and also consumed 1000W and took up to 15 seconds.
By contrast, Professor Baek’s team’s new process uses only ultrasound to locally heat and melt the conjugation point itself thereby reducing power consumption to 100W and conjugation time to 1~5 seconds.
The technique developed by Professor Baek and Lee Ki Won Doctorate student was awarded Excellent Dissertation Award by world famous journals like the Electronic Components and Technology Conference and is being recognized worldwide.
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