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- Prof. Hong-Sik Yun was elected as chairperson of Korea Surveying Society
- Prof. Hong-Sik Yun, Department of Civil, Architectural and Environmental System Engineering, was elected as 20th chairperson of Korea Surveying Society. The term of chairperson is 2 years from January 1st, 2018. Korea Surveying Society is founded August, 1918. It promoted the development of research & technology about Surveying, Geodesy, Photogrammetry, cartology, topography. It also led advancement of Surveying technician and promoted friendship for each member.
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- 작성일 2018-02-27
- 조회수 5952
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- Research on Short Career Horizons and Firm Innovation by Prof. Sang Kyun KIM
- As the business environment is rapidly changing, firms are required to formulate and implement strategies which help them to adapt to environmental and technological changes, to achieve innovation and long-term competitive advantages, and even to survive. Strategy scholars view a company's chief executive officer (CEO) as the most powerful actor in the decision-making process and call for further research to understand the role of CEOs in the innovation process beyond the simple relationship between CEOs' personal characteristics and financial performance. Building on labor market evaluations and legacy conservation motivation perspectives that explain risk aversion by CEOs facing a short career horizon, this study seeks to unpack the mechanisms linking a CEO's career horizon to a firm's breakthrough innovations. Using 10-year panel data from 681 U.S. firms, we find that a short career horizon induces a CEO to become risk-averse and thus forego investing in risky breakthrough innovations because they could harm the firm's short-term performance, endangering job prospects and CEO legacies in the short term. The results also show that the impact of a short career horizon on breakthrough innovations is partially mediated by a reduction in R&D spending. Furthermore, different performance implications associated with a firm’s exploitation and exploration activities affect a CEO's willingness to commit to such breakthrough innovations. That is, when a firm leverages internal knowledge within a familiar technological domain (i.e., a focus on exploitation), this mitigates the behavioral tendencies of a CEO with a short career horizon, such as not pursuing breakthrough innovations, while such behavioral tendencies are exacerbated when a firm applies external technologies with an unfamiliar trajectory (i.e., a focus on exploration). This study contributes to the literature on CEO decision-making and firm innovation. First, our study contributes to the literature on CEO decision-making by elucidating a mechanism that can explain the influence of a CEO’s career horizon on a firm’s ability to generate breakthrough innovations. Second, we emphasize the role of CEOs in the innovation process by suggesting that motivational factors can shape a CEO’s willingness to allocate firm resources to risky projects, which in turn can affect firms achieving breakthrough innovations. Practically, this research provides insights to those seeking to develop breakthrough innovations and manage organizational learning and innovation process for their firms. The alignment between a CEO’s willingness to take risks and a firm’s emphasis on organizational learning in both familiar and unfamiliar technological trajectories has an influence on firm innovations. It implies that CEOs play an important role in producing breakthrough innovations and that a strategic alignment between the willingness to take risks and the firm’s engagement in risky strategies can enable the firm to achieve greater innovations.
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- 작성일 2018-02-27
- 조회수 5954
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- SKKU-Leiden Joint Forum was Successfully Held on Jan 31st
- The SKKU-Leiden University Joint Forum was successfully held on Jan 31st at the SKKU 600th Anniversary Hall. This forum was the 2nd join forum after the 1st forum held in Leiden University during June 30th ~ July 1st in 2016. At the forum, 5 professors from the Department of East Asian Studies at SKKU and 4 professors from the Leiden University Institute for Area Studies (LIAS) participated and spent time to discuss subjects such as: culture, arts in China and Japan, labor and human rights in North Korea, and Korean history with new perspectives. The Leiden University Institute for Area Studies (LIAS) is a global research institute with long tradition and excellent academic competence. Also, it has created some of the world’s top interdisciplinary research performance in the field of Asian Studies. From the forum, the Academy of East Asian Studies at SKKU is expected to expand its global academic network into the European region and prepare the ground for sustainable and productive joint research with Leiden University.
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- 작성일 2018-02-27
- 조회수 6036
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- Highly Efficient Thin-Film Transistor via Cross-Linking 1T Edge Functional 2H Molybdenum Disulfides
- Research on flexible thin film transistors (TFTs) has been steadily under way, with the next generation devices being noted. Molybdenum disulfide (MoS2), one of the two-dimensional materials, has excellent optical, electrical and chemical properties and is used in field effect transistors (FETs). However, most of the synthesis studies are concentrated on chemical vapor deposition, and it is necessary to make a method to manufacture MoS2 while maintaining crystallinity through an inexpensive solution process. In this study, MoS2 FET was implemented through a solution process by selectively modifying the edge of MoS2 only with organic compounds, without using metal ions at all. The paper was published in ACS Nano (2017, 11, 12832-12839) by the researchers led by Hyoyoung LEE (CINAP-IBS, Professor of Chemistry) with Mun Seok JEONG (Professor of Energy Science). To exfoliate the 2D MoS2 bulk materials into single-layer edge-1T basal-2H MoS2 sheets, they used 4-carboxy-benzenediazonium (+N2-benzene-COOH) tetrafluoroborate. Edge-exposed nucleophilic sulfides of the bulk MoS2 can act as substitutes for the electrophiles of +benzene-COOH diazonium salts. The chemically attached polar COOH functional group facilitates the exfoliation by creating an increased electrostatic repulsion force between the MoS2 nanosheets. As a result, the configuration of the resulting exfoliated HOOC-benzene-MoS2 sheets (e-MoS2) is changed to the conducting 1T or 1T′ phase through functionalization at the edge part, while remaining in the semiconducting 2H phase at the basal plane. Compared with n-BuLi exfoliated MoS2 (n-MoS2) and basal plane functionalized MoS2 (b-MoS2), which mainly have metallic 1T or 1T′ phase during the chemical treatment showing the on/off ratio of <100, e-MoS2 has a relatively high mobility (μ= 1.2 cm2/(V s) and on/off ratio (= 106) due to the low number of defect sites in the e-MoS2 nanosheets. PDDA (polydiallyldimethylammonium chloride) is used as a cationic layer, while e-MoS2 is used as an anionic layer for the channel film formation. Cross-linking via hydrogen bonding of the negatively charged COOH of the e-MoS2 sheets with the help of a cationic polymer provided good film formation for solution processing TFT channels. The e-MoS2 TFT exhibited great electrical performance (average mobility of 170.8 cm2/(V s) at 1 V and on/off ratio of 106) on SiO2/Si substrates and also a high mobility of 36.34 cm2/(V s) (on/off ratio of 103) on PDMS/PET substrates for flexible TFTs. This edge functionalization can be applied to various 2D layered bulk inorganic materials for the chemical, electronic, optical, and electrical modulation of 2D materials. This study is meaningful in terms of the significant potential of functionalized 2D materials in various bulk devices and low-cost electronics.
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- 작성일 2018-02-27
- 조회수 6036
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- H.E. Ernesto Cordero Arroyo, Speaker of the Mexican Senate, Gives Special Lecture at SKKU
- On January 23, Sungkyunkwan University (President: Kyu Sang CHUNG) invited H.E. Ernesto Cordero Arroyo, the Speaker of the Mexican Senate, to give a special lecture. Senator Arroyo graduated from the Mexican Autonomous Institute of Technology (ITAM) and earned a master’s degree in economics from the University of Pennsylvania, USA. He then served as the Director of Integral Administration of Risks in the Banco Nacional de Obras y Servicios Publicos (BANOBRAS), the Undersecretary of Energetic and Technological Development Planning in the Energy Secretariat, the Head of the Social Development Secretariat, and the Finance Secretary of Mexico. Senator Arroyo gave a special lecture on the topic of “Mexico in a Changing World: Challenges and Opportunities.” He explained the current situation in Mexico, a center of massive political and economic change, and explained to students how Mexico will overcome this uncertainty. Senator Arroyo’s visit to South Korea was made possible through an invitation from Sye Kyun CHUNG, the Speaker of the Korean National Assembly. Senator Arroyo wished to visit Sungkyunkwan University, the oldest university in Korea, and give a special lecture at SKKU because of his interest in Education. SKKU’s President Kyu Sang CHUNG said, “Mexico is the center of the Korean Wave in Central and South America. Through Senator Arroyo’s visit, a variety of projects are being planned with several universities in order to realize not only education and research, but practical exchange and cooperation between students and cultures.”
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- 작성일 2018-01-30
- 조회수 6196
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- Photosynthetic Production of α-farnesene from CO2 by Profs. Han Min WOO & Hyun Jeong LEE
- Prof. Young Hee LEE, Center for Integrated Nanostructure Physics, Institute for Basic Science at Sungkyunkwan University has successfully developed a new method for converting monolayer molybdenum disulfide (MoS2) into molybdenum ditelluride (MoTe2) via substitution of tellurium to MoS2 by chemical vapor deposition (CVD). In order to trigger such a substitutional reaction, High reaction temperature is necessary for Te-substitution but the instability arises because of lower thermal stability of MoTe2 than that of MoS2. Although the MoTe2, which is product after Te-substitution, is vaporized above 700 °C due to the thermal instability, the substitutional reaction below 700 °C is no longer possible. To resolve this issue, we introduced sodium telluride (Na2Te) as a telluriding catalyst and further was able to achieve stable MoTe2 by provoking substitutional reaction at temperature below 700 °C. The research team confirmed that the Te-substitution reaction occurs preferentially from the edge and grain boundary of the MoS2 flake and further constructed lateral hetero semiconductor junction of MoS2-MoTe2. Furthermore, various phases such as alloy (MoS2-xTex), semiconductor (2H-MoTe2), and metal (1T’-MoTe2) were obtained by adjusting experimental parameters of temperature and sodium concentration. We also demonstrated that the band gap of MoS2-xTex alloy can be modulated by controlling the tellurium composition. Dr. Seok Jun YUN, the leading scientist of the research team, predicted that "It is possible to synthesize compound materials by a substitutional technique even for the unstable compounds." The conversion method using the telluriding catalyst (Na2Te) can be applied not only to MoS2 but also to tungsten disulfide (WS2), which is another type of transition metal dichalcogenide. This research, conducted by prof. Young Hee Lee and Seok Joon Yun who is the first author of this research, was published in Nature Communications (IF 12.124), a worldwide scientific journal in science and technology, on December 18. [Figure 1] The conversion process of monolayer molybdenum disulfide to molybdenum ditelluride [Figure 2] The phase modulation diagram with sodium hydroxide concentration and telluriding temperature [Figure 2] The phase modulation diagram with sodium hydroxide concentration and telluriding temperature
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- 작성일 2018-01-30
- 조회수 6009
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- Production of Multilayer Graphene Composite Metals and Alloy Hybrid Nanoparticles
- Prof. Su Jeong SUH, Director of the Advanced Materials and Process Research Center for IT, deployed infrastructure for research equipment, including a semiconductor process clean room and ultra-precision material analysis equipment, by receiving the designation of Technology Innovation Center (TIC) from the Ministry of Commerce Industry and Energy in 1999. He conducted R&D projects using equipment built with TIC projects after receiving the designation of Regional Research Center (RRC) from the Ministry of Science and Technology in 2002. In addition, he was designated Regional Innovation Center (RIC) by the Ministry of Commerce Industry and Energy in 2006 to expand the industry-university cooperation research infrastructure and also continued to operate diverse education projects and business support projects, including workforce training for semiconducting processes, education in science and engineering for the unemployed, technical exchange meetings, and process technology support. Recently, he was selected as the Smart e-Plating Regional Innovation System (RIS) in 2012, Gyeonggi Regional Research Center (GRRC) by the Ministry of Commerce Industry and Energy, and as the base university of an ernergy cluster project by the Korea Electronic Power Corporation (KEPCO) in 2017. The group is expanding its research into the field of surface treatment processing and advanced sensors and works as a bridghead for intramural academic-industrial sectors. Research Field The Magnetic Material Laboratory of the Department of Advanced Materials Science and Engineering has performed 10 technology transfers and 22 registrations of internal and external patents (7 external) in the past three years. Moreover, recently, Research Professor Young Il SONG has done research as a key person in the laboratory, easily producing eco-friendly multi graphene layer coated single or alloy metal nanoparticles (MGMNs) using a wire electric explosion method. These MGMNs have received widespread attention because of the unique structure of the multi-graphene shells encapsulating second-phase metal cores. The metal particles serve as a protection against environmental degradation effects and oxidation. Furthermore, these novel MGMNs induce unique electronic, optical, and magnetic properties due to quantum confienement and very high surface per volume ratio, which are undoubtedly important for the evolution of nanotechnology. In addition, these MGMNs can be used in various application materials such as energy storage materials, electrode paste, printable ink, catalysts, ferrofluids, and sensors. Our researchers have unfolded not only the development of MGMNs by electric explosion method, but also the development of MGMNs with various metal core nanoparticles by chemical coprecipitation method. This technology also contributes to the increase of battery capacity and the enchancement of power moment output using graphene filme and thse metal nanoparticles on current collectors of lithium ion batteries. We are conducting further research on MGMN-based application devices.
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- 작성일 2018-01-30
- 조회수 6246
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- Dean's visit from the College of Engineering, University of Southern Denmark
- In December 8th, Henrik Bindslev, Dean of the College of Engineering in University of Southern Denmark(SDU) visited our College of Engineering. Sung Ho Hwang, Vice Dean of College of Engineering in SKKU greeted him and discussed cooperation between SDU and SKKU. In this discussion, Torben Orla Nielsen(Research & innovative counseller, Embassy of Denmark), Sunwoo Lee(Research & innovative officer, Embassy of Denmark) and Prof. Hugo Rodrigue(Mechanical Engineering, SKKU) also attended and talked about student exchange, research of robotics & automation. Both colleges promised various and continuos cooperation. After the meeting, Henrk Bindslev toured labs for robotics & automation technology. ※ State of cooperation between SDU and SKKU 1. Agreement & visit A. Agreement (2005.7.19.): Student exchange(general), research cooperation, exchange of academic materials B. Student exchange(2005.7.19., 2016.4.27.): 4 students per year C. Visit: Henning Anderson(Vice Dean of Education, SDU) visited SKKU Robotics Engineering Research Center (2013.9.27.) 2. Student Exchange (~fall semester of 2017) A. Total number of exchange students: SDU to SKKU–32 / SKKU to SDU–30 B. Fall semester of 2017: SDU to SKKU-2 / SKKU to SDU-2
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- 작성일 2017-12-27
- 조회수 7037
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- SKKU Ranks No.2 in Korean University Rankings by Joong Ang Daily
- SKKU was named No.2 in Korean University Rankings by the Joong Ang Daily, followed by Seoul National University. Out of 61 comprehensive universities in Korea, the Joong Ang Daily evaluated the universities’ performances based on 33 criteria, including number of citations, scholarships, and employment rate. SKKU received huge recognition mainly for its support to faculty members and students. Last year, the school offered a total of 3.62 billion won in research expenses to faculty members, while giving 3.93 billion won of scholarships to students. SKKU is also well-known for publishing many research articles in international journals. Sung Jin Song, Vice-President of SKKU’s Planning and Regulation Division, said, “SKKU has been making investments for research and education, and we now see its results in our high employment rate and potential Nobel prize awardees like prof. Nam Gyu PARK at the Department of Chemical Engineering.”
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- 작성일 2017-11-17
- 조회수 6433
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- Prof. Seunghee, Park received the citation from the Minister of Security and Public Administration
- Prof. Seunghee, Park received the citation from the Minister of Security and Public Administration On November 15th, Prof. Seunghee, Park(Civil, Architectural Engineering and Landscape Architecture) received a citation from the Minister of Security and Public Administration, at the 2017 Seminar commemorating the 10th anniversary of the Korea Disaster Prevention Society was held in KINTEX, Ilsan. Prof. Seunghee, Park has published 50 papers in the internationally renowned SCI(E) academic journals through steady research for the past 9 years. Also, he was recognized for his contribution to the development of disaster prevention through the active research and development in 'disaster prevention of facilities' and 'disaster safety management technology' which is based on smart construction infrastructure technology, like ① urban facilities' non-destructive inspection and structural saftety evaluating technology using the advanced intelligent sensing technology, ② lifecycle maintenance technology through the construction of urban facility information system using laser scan, ③ disaster prevention technology for the safety management of city facilities against human disaster and natural disaster, ④ smart safety and energy management technology of the urban facilities utilizing IOT, etc. Prof. Seunghee, Park said and conveyed his impression, "I am very pleased and honored to have been recognized for efforts for in the field of disaster prevention. In the future, I will do my best to develop ICT convergence disaster management technology and disaster resilient response system for the smart city." ▲ Prof. Seunghee, Park
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- 작성일 2017-11-17
- 조회수 7053