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- Visiting from Harbin Institute of Technolgy (7/26 10:00~)
- Visiting from Harbin Institute of Technolgy (7/26 10:00~) July 26th 2016, International affair and academic affair team from Harbin Institute of Technology visited us and discussed about the future cooperation and student exchange program. Zheng Mingdong (Deputy Director,HIT International Affair) and Zhu Ning (Deputy Director, HIT Academic Affair) met Song, Sung Jin (Dean, College of Engineering), Jeon, Byeung Woo (Dean, College of Information and Communication Engineering) and Eom, Young Ik (Dean, College of Software). Both HIT and SKKU agreed on continuing cooperation, and discussed not only the future Intern-lab or team project program, but also sending SKKU students to HIT. Their schedule from 10am to 2pm was as follows ; 10:00 - 10:20 : Arrival & Introduction of Participants, Greetings 10:20 - 10:30 : Watching Video Clip about Introducing SKKU(Chinese) 10:30 - 10:50 : Disscussion 10:50 - 11:30 : LAB Tour (Prof. LEE, Sung Joo) 11:30 - 12:00 Dormitory tour 12:00 - Welcom Lunch with HIT Students
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- 작성일 2016-07-27
- 조회수 6283
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- Prof.Chang Wook Ryu,Bio-Oil Upgrading: using supercritical fluid to produce electricity and biofuels for next generation
- Prof.Chang Wook Ryu, Bio-Oil Upgrading: using supercritical fluid to produce electricity and biofuels for next generation Due to the increase of concerns for draining of energy resources and environmental pollutions, academic researchers are striving to produce non-fossil energy sources and chemical products that are renewable, sustainable and environmental friendly. 1st generation biofuels such as bioethanol and biodiesel are already commercialized in the industry, but low energy content and competition with food resources, are always considered as weakness of the 1st generation biofuels. Therefore, unlike 1st generation biofuels, biofuels that have less oxygens and competition have become the main interest for researchers. Among various heat transfer processes for biomass that are not dealing with food resources, ‘fast pyrolysis’ is the most famous one. This process is derived from empty palm fruit bunch, which decomposes the material for a few seconds at the temperature of 400-600°C in an oxygen free environment, which produces liquid bio-oil. However, this process has many weaknesses like; (1) low heat stability and short storage period, (2) low energy content, (3) an instability to combine with fossil fuels, (4) low pH causing corrosion of machines, (5) separation of materials if stored for a long time. And due to these weaknesses, bio-oil is not easy materials to transfer, store, and use. This research is about bio upgrading and eliminating weaknesses we have seen in the original ‘fast pyrolysis’ process. Unlike the typical bio oil upgrading process using the usual catalyst, this research is not using a catalyst or hydrogen. Instead, they use in-situ generated hydrogen and supercritical alcohols to upgrade bio oil. And from this research, we were able to find that temperature and heat transfer characteristics are similar to medium grade oil. We believe the upgrade bio-oil from this process will generate green electricity and bio gasoline as well as, bio diesel for automobiles.
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- 작성일 2016-07-25
- 조회수 6222
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- Prof.Tae-il KIM(Chemical), Dramatically Enhanced Mechanosensitivity and Signal-to-Noise Ratio of Nanoscale Crack-Based S
- Abstract The sensitivity of a nanoscale crack-based sensor is enhanced markedly by modulating crack depth. The crack depth-propagated sensor exhibits ≈16 000 gauge factor at 2% strain and a superior signal-to-noise ratio of ≈35, which facilitates detection of target signals for voice pattern recognition.
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- 작성일 2016-07-20
- 조회수 6357
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- Intern-Lab Program with Harbin Institute of Technology(HIT) & Jilin University
- Intern-Lab Program with Harbin Institute of Technology(HIT) & Jilin University During every vacation, there is "Intern-Lab Program" with Harbin Institute of Technology(HIT) & Jilin University in College of Engineering. From 7.19 to 8.18, 17 students of HIT and 5 students of Jilin University visiting Sungkyunkwan University(SKKU) will study and research with postgraduate students in SKKU. Students are major in Mechanical Engineering, Electronic Sciences, Software and Computer Engineering.
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- 작성일 2016-07-20
- 조회수 6277
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- SAINT-NTC of Shanghai University Agreement Signing Ceremony
- SAINT-NTC of Shanghai University Agreement Signing Ceremony SONG On July 14th, the signing ceremony of agreement between SKKU SAINT and Nanoscience and Technology Research Center(NTC) of Shanghai University was held. Dean SONG, Sung Jin(College of Engineering) and President Liyi SHI(Science and Technology Research Academy, Shanghai University) agreed to research collaborations between SKKU SAINT and SU NTC. In this ceremony, both sides had a discussion about cooperation in "Nanographene" and academic exchanges like young scientists joint research project. Shanghai University NTC promised to attend the seminar held at SKKU in September, and SKKU SAINT also hope to visit NTC in October. Their visit schedule was from 10:00 am ~ 5:00 pm as follows ; 10:00 ~ 10:05 Arrival & Introduction of Participants 10:05 ~ 10:10 Welcoming Speech (Prof. Sungjin SONG, Dean of the College of Engineering) (Prof. Liyi SHI, President of Science and Technology Research Academy & Director of the Center for Technology Transfer) 10:10 ~ 11:00 - SKKU & SAINT Intro. (Prof. Sungjin SONG, Dean of the College of Engineering / Prof. Sungjoo LEE, Department head of SAINT) - Sanghai University & NTC Intro. (Prof. Liyi SHI, President of Science and Technology Research Academy & Director of the Center for Technology Transfer) 11:00 ~ 11:20 MOU signing ceremony & Discussion 11:20 ~ 11:30 Take a commemorative photograph 11:30 ~ 13:00 - Samsung Library Tour (Sungbae LEE, Senior Librarian) - SAINT Lab Tour (Prof. Sungjoo LEE, Department head of SAINT) 13:00 ~ 15:00 Lunch (Korean restaurant “MANSANG”) 15:00 ~ 16:00 Move to the SAMSUNG Innovation Museum 16:00 ~ 17:00 SAMSUNG Innovation Museum Tour
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- 작성일 2016-07-15
- 조회수 6303
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- Prof. Nam-Gyu PARK, Self-formed grain boundary healing layer for highly efficient perovskite solar cells
- Self-formed grain boundary healing layer for highly efficient CH3 NH3 PbI3 pervovskite solar cells Dae-Yong Son, Jin-Wook Lee, Yung Ji Choi, In-Hyuk Jang, Seonhee Lee, Pil J. Yoo, Hyungjung Shin, Namyoung Ahn, Mansoon Choi, Dongho Kim, Nam-Gyu Park Nature Energy 1, Article Published online: 20 June 2016 Abstract Perovskite solar cells have attracted significant research efforts due to their remarkable performance, with certified power conversion efficiency now reaching 22%. Solution-processed perovskite thin films are polycrystalline, and grain boundaries are thought to be responsible for causing recombination and trapping of charge carriers. Here we report an effective and reproducible way of treating grain boundaries in CH3NH3PbI3 films deposited by means of a Lewis acid–base adduct approach. We show by high-resolution transmission electron microscopy lattice images that adding 6 mol% excess CH3NH3I to the precursor solution resulted in a CH3NH3I layer forming at the grain boundaries. This layer is responsible for suppressing non-radiative recombination and improving hole and electron extraction at the grain boundaries by forming highly ionic-conducting pathways. We report an average power conversion efficiency of 20.1% over 50 cells (best cell at 20.4%) together with significantly reduced current–voltage hysteresis achieved by this grain boundary healing process.
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- 작성일 2016-06-23
- 조회수 6794
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- “End of Semester Party with Music” with International & Korean students
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On June 22, 2016, The College of Engineering held “End of Semester Party with Music” for all international undergraduate and graduate students at 03108, 1F, Student Center Assembly Hall. Dean SONG, Sung-Jin, Vice Dean JOO, Jin-Ho, Vice Dean NOH, Sang-do joined the event. This event was planned for mingling with international students and Korean student council for future collaboration. Therefore, student council prepared this event with representative music clubs at the College of Engineering like ‘공상 – GONGSANG’(Engineering School’s Music Band) and ‘늘품-NEULPUM’(Engineering School’s Samulnolyi). GONGSANG played 1. Love Is An Open Door- Frozen (ost), 2. Because of You- Kelly Clarkson, 3. Viva la vida – Cold play. ‘Nealpum’ have been playing traditional Korean music with beautiful traditional clothes for 25 years here at Sungkyunkwan University. The college of Engineering prepared snacks with 떡-Korean Rice cake, 식혜 – Korean Sweet Rice Drink, Egg Muffin and drinks.
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- 작성일 2016-06-22
- 조회수 6104
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- Student Mobility To Be Created with Pontifical Catholic University of Peru
- Student Mobility To Be Created with Pontifical Catholic University of Peru The College of Engineering established a student exchange agreement with Pontifical Catholic University of Peru, which is known as the most prestigious university in Peru, in June 2016. t is a remarkable consequence of the College of Science’s visit to Lima last November to attend the study recruitment fair hosted by PRONABEC. The College of Engineering and College of Information and Communication Engineering also signed the agreement jointly with the College of Science to increase the chance of academic and student mobility collaboration. The university-wide MoU was also formed between two Presidents on top of the college-level contract for student exchange program.
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- 작성일 2016-06-20
- 조회수 6023
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- Prof. Hyun Suk JUNG (Materials) published at Nature Communications on Selective dissolution of halide perovskites ...
- Selective dissolution of halide perovskites as a step towards recycling solar cells Byeong Jo Kim, Dong Hoe Kim, Seung Lee Kwon, So Yeon Park, Zhen Li, Kai Zhu & Hyun Suk Jung Nature Communications Volume 7, Article number 11735 | doi:10.1038/ncomms11735 23 May 2016 Published Abstract Most research on perovskite solar cells has focused on improving power-conversion efficiency and stability. However, if one could refurbish perovskite solar cells, their stability might not be a critical issue. From the perspective of cost effectiveness, if failed, perovskite solar cells could be collected and recycled; reuse of their gold electrodes and transparent conducting glasses could reduce the price per watt of perovskite photovoltaic modules. Herein, we present a simple and effective method for removing the perovskite layer and reusing the mesoporous TiO2-coated transparent conducting glass substrate via selective dissolution. We find that the perovskite layer can be easily decomposed in polar aprotic solvents because of the reaction between polar aprotic solvents and Pb2+ cations. After 10 cycles of recycling, a mesoporous TiO2-coated transparent conducting glass substrate-based perovskite solar cell still shows a constant power-conversion efficiency, thereby demonstrating the possibility of recycling perovskite solar cells. Shareable Link : http://rdcu.be/iQfF
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- 작성일 2016-06-15
- 조회수 6209
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- Prof. Seunghyun Baik(Mechanical) published Ultrahigh Thermal Conductivity of Interface Materials on Advanced Materials
- Ultrahigh Thermal Conductivity of Interface Materials by Silver-Functionalized Carbon Nanotube Phonon Conduits Daewoo Suh, Choong Man Moon, Duckjong Kim, Seunghyun Baik First published: 8 June 2016 Full publication history DOI: 10.1002/adma.201600642 View/save citation Abstract An ultrahigh thermal conductivity (κ = 160 W m−1K−1) of thermal interface materials is achieved with a high enhancement factor (96). A small amount (2.3 vol%) of 1D multiwalled carbon nanotubes (MWNTs) with high κ constructs effective phonon transport pathways between microscale silver-flake islands, and a solid phonon transport junction is realized by the coalescence of silver nanoparticles pre-functionalized on the MWNTs. http://onlinelibrary.wiley.com/doi/10.1002/adma.201600642/full
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- 작성일 2016-06-14
- 조회수 6713