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Fish Gill Wrinkle Secrets Revealed by Joint Res... 2014-07-04
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Fish Gill Wrinkle Secrets Revealed by Joint Research Team by Seoul National University Professor Ho Young Kim and Seogang University Professor Won Jeong Kim
- Increase heat and mass transfer efficiency
- Study published online on PNAS


▲From left: Seoul National University Professor Ho Young Kim, Seogang University Professor Won Jeong Kim, Seoul National University Ph.D Candidate Keun Hwan Park

 

The wrinkles on fish gills improve the efficiency of oxygen exchange, revealed a Korean research team.  Professor Ho Young Kim from Seoul National University’s Mechanical and Aerospace Engineering along with Professor Won Jeong Kim from Seogang University’s Mechanical Engineering stated on the 2nd that they found the secrets of fish gill wrinkle shapes. 
 
 The research team analyzed the gills of 250 fish of 75 different types.  They found that the lamellae, which is the most basic structure of fish gills, maintained equidistant from one another regardless of fish size or type. 

According to the research data, fish gills increase the surface area that comes into contact with flowing water, and improves the oxygen exchange.  However, if the distance between wrinkles is too small, it is difficult for water to pass the fish gills and makes it difficult for oxygen exchange.  Therefore, the distance between wrinkles must be perfect so that there are no difficulties. 
 
This research did not approach the experiments in an anatomy sense, but through existing fluid dynamic analysis.  The world-renowned PNAS published the results online on May 20 (Thesis title: Optimal lamellar arrangement in fish gills).
 
Researcher Keun Hwan Park stated, “Although there has been considerable research into fish gills over the years, this research had more hydrodynamic results.  This research on the oxygen exchange in the gills will improve the efficiency in the future.”
 
Professor Ho Young Kim Information
1. Education
○ Seoul National University Mechanical Engineering B.S., 1994
○ MIT Mechanical Engineering Ph.D, 1999
 
2. Experience
○ Seoul National University Mechanical Engineering Professor (2005-Present)
○ Korea Institute of Science and Technology Senior Research Fellow (1999-2004)
○ MIT Visiting Researcher (2001)
○ University of Cambridge Visiting Researcher (2003)
○ Harvard University Visiting Researcher (2004, 2011-2012)

 

Professor Won Jeong Kim Information
1. Education
○ Seoul National University Mechanical Engineering B.S., 2006
○ Seoul National University Mechanical Engineering M.S., 2009
○ MIT Mechanical Engineering Ph.D, 2013
 
2. Experience
○ Seogang University Mechanical Engineering Professor (2013-Present)
○ Samsung Electronics (2006-2007)
 
Ph.D Candidate Keun Hwan Park Information
1. Education
○ Seoul National University Mechanical Engineering B.S., 2008
○ Seoul National University Mechanical Engineering Ph.D. Candidate

Image1. Fish Gills (a) Rockfish profile. Fish have gills on both sides. (b) Gill part. Bone made of cartilage has blood vessels tightly attached in thin plates. (c, d) Electron Microscope image (c)Microscope image (d). Wrinkles arranged in regular intervals . (e) Concept of water flowing past fish gills. As water passes through the intervals in the wrinkles, an oxygen exchange occurs.


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Seoul National University Professor Lae Hyuk Ja... 2014-05-28
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▲ Professor Lae Hyuk Jang from Department of Computer Engineering


On the 14th, Seoul National University announced that Professor Lae Hyuk Jang from the Department of Computer Engineering became the senior editor for TODAES (Transactions on Design Automation of Electronics Systems) by ACM (Association for Computing Machinery). For three years beginning this June, Professor Jang will be the senior editor of ACM TODAES.
 
ACM was established in 1947 by IEEE (Institute of Electrical and Electronics Engineers) and became a world-renowned computer society.  Additionally, it presents the Computer Science Nobel Prize, called the “Turing Award.” There are several SIG (Special Interest Group) that are divided into database-related TODAES, programming language-related SIGPLAN, computer structure-related SIGARCH, among 38 research areas. 
 
Professor Jang graduated from Seoul National University with a B.S. from the Department of Control and Instrumental Engineering and has been a Professor in the Department of Computer Engineering since 1997.  He researches low-power systems and has been world-renowned for his research in this area.  He became the first Korean Chairman of the Computer Society Design Automation Division in 2012.
 
Professor Jang stated, “ACM has had a 67 year history as the best computer-related society.  I am proud to become the first Korean ACM Journal senior editor and hope I can contribute positively to the area by representing Korea.”



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Seoul National University Researchers had 7 arti... 2014-05-28
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On the 12th, Seoul National University announced its researchers had 7 articles printed in the May edition of the world-renowned ACI Structural Journal.
 
The ACI Structural Journal has had a 111 year history of research in concrete design, theory, and analysis.  There were 21 articles in the May edition, and 7 of them were from a research team at Seoul National University.
 
The researchers that had their articles printed were Department of Architecture Professor Sung Gul Hong, Professor Hong Keun Park, Professor Chul Ho Lee, and Professor Hyun Goo Kang, as well as Department of Civil and Environmental Engineering Professor Jae Yul Jo and Professor Bhung Hwan Oh.
 
The topics of these papers were ▲ development of shear strength model using slab-shear connections that do not have shear reinforcement (Department of Architecture Professor Hong Keun Park) ▲ a study on the relationship development of the attachment-slip-strain strand delivery period in the pre-tensioned concrete (Department of Civil and Environmental Engineering Professor Jae Yul Jo) ▲ development of the strength model shear head reinforced with welded concrete, slab-concrete filled steel tube, column, joints, etc (Department of Architecture Professor Chul Ho Lee) ▲ a discussion paper on the steel fiber, concrete tensile reinforcement model study (Department of Civil and Environmental Engineering Professor Jae Yul Jo), among others.
 
Professor Sung Gul Hong stated, “the formulation of concrete involves many materials that significantly alter the complex structural behavior, so ongoing research is needed in this area.  This recent feat is a reflection of Seoul National University’s prowess.”


ACI Structural Journal (Vol. 111, No. 3) May 2014 R11; Articles submitted by Seoul National University Researchers

Professor Hong Keun Park (Department of Architecture), Professor Kyung Kyu Choi (Soongsil University Professor, Ph.D from Seoul National University) plus one other researcher


“Shear-Strength Model for Slab-Column Connections Subjected to Unbalanced Moment”

 

Professor Jae Yul Jo (Department of Civil and Environmental Engineering), Ho Park (Seoul National University Ph.D Candidate)

“Bond-Slip-Strain Relationship in Transfer Zone of Pretensioned Concrete Elements“

 

Professor Byung Hwan Oh (Department of Civil and Environmental Engineering), Si Nae Im (Hyundai Engineering and Construction Researcher, M.S. from Seoul National University), Professor Myung Kyu Lee (Jeonju University Professor, Ph.D from Seoul National University), Professor Sung Won Yoo (Woosuk University Professor, Ph.D from Seoul National University)

“Analysis and Prediction of Transfer Length in Pretensioned, Prestressed Concrete Members”

 

Professor Kyun Goo Kang (Department of Architecture), Professor Woo Suk Kim (Keumoh University Professor, Ph.D from Seoul National University), Professor Sung Gul Hong (Department of Architecture) plus one other researcher

“Flexural Testing of Reinforced Concrete Beams with Recycled Concrete Aggregates”

 

 Professor Chul Ho Lee (Department of Architecture), Jin Won Kim (RIST Researcher, Ph.D from Seoul National University), Professor Hyun Goo Kang (Department of Architecture)

“Shearhead Reinforcement for Concrete Slab to Concrete-Filled Tube Column Connections”

 

 Professor Sung Chul Chun (Mokpo University Professor, Ph.D from Seoul National University under advisor Professor Sung Gul Hong), Professor Young Soo Shin (Ewha Women’s University Professor, Ph.D from Seoul National University)

“Cyclic Testing of Exterior Beam-Column Joints with Varying Joint Aspect Ratio”

 

 Professor Sung Chul Lee (Graduate School of International Atomic Energy Professor, Ph.D from Seoul National University), Professor Jae Yul Jo (Department of Civil and Environmental Engineering) plus one other researcher

Closure to Discussion, “Tension-Stiffening Model for Steel Fiber-Reinforced Concrete Containing Conventional Reinforcement”



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POSCO Chairman Oh Jun Kwon•Daewoo Shipb... 2014-05-28
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On April 30, Seoul National Unviersity School of Engineering awarded POSCO Chairman Oh Jun Kwon and Daewoo Shipbuilding and Marine Engineering President Jae Ho Go with the Achievement in Development Award.  The award is given to individuals outside of the school who contributed significantly to the development of the engineering sector.  Since 1989, 40 awards have been given at 23 different occasions. 
 
POSCO Chairman Oh Jun Kwon graduated from Seoul National University’s Department of Metallurgical Engineering in 1972 and received a Ph.D from the University of Pittsburgh.  He became the POSCO Chairman this year after having been the POSCO Chair of Technology Research Institute, RIST Director, and POSCO Executive Vice President of Technology. 
 
In particular, Chairman Kwon enabled cooperation between the academic and industrial worlds by fostering research, establishing a research fund, and establishing a specialized research center.  He also supported alumni activities over the years.
 
Daewoo Shipbuilding and Marine Engineering President Jae Ho Go entered Daewoo in 1980 and has been the Shipping Operations Chair, Head of the UK Branch, and Head of the Shipbuilding Business.  He became the President in 2012 and has been very influential in the domestic shipbuilding industry on a world-class level.
 
President Go has a particular management style that has led to numerous academic scholarships and research projects for SNU in the past 10 years.  In addition, he has allowed co-teaching of coursework and field expert lectures that has improved the education in the particular field. 
 
Picture Description: POSCO Chairman Oh Jun Kwon (Far Left), Daewoo Shipbuilding and Marine Engineering President Jae Ho Go (Far Right)


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Seoul National University Professor Yong Taek H... 2014-05-20
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▲Electrical and Computer Engineering Professor Yong Taek Hong (Left), Ph.D Research Student Tae Hoon Kim (Right)

 

On the 28th, Seoul National University announced that Professor Yong Taek Hong from the Electrical and Computer Engineering department developed an elastic carbon nanotube technology using inkjet printing.  This research was announced in the “Applied Physics Letters” on March 17 as well as “Nature” journal on April 17 as the research highlight.  
 
 This research solved the manufacturing issues involved with the elastic substrate, electrode structure, and large area electronic system.  In addition, the technology saves on energy due to the high electrical and mechanical characteristics.

The elastic substrate is weakly resistant to organic solvents, and the interfacial properties are hydrophobic.  Although there has been a considerable amount of research on this subject over the years, most researchers have faced difficulty due to the limitations in technical skills related to elasticity-based printing.
 
The research team produced a solution for inkjet printing by dispersing carbon nanotubes in an aqueous solution to increase the stability of the surfactant substrate.  Through inkjet printing, the elastic substrate of the carbon nanotube was placed in thin films of various patterns.

 

With a simple final treatment, they were able to develop elastic electrodes with excellent electrical properties.  The electrical values of the carbon nanotude electrodes were maintained even after repeated experiments, so they were able to verify the mechanism.
Professor Hong stated, “This research will be useful for medical, sports, rehabilitation, leisure, robots, and next-generation technology like wearable devices.”
 
Reference
http://www.nature.com/nature/journal/v508/n7496/full/508291c.html

 

▲ Electric electrodes connected to LED

 

▲ Carbon nanotubes that connect the crack

 

Professor Yong Taek Hong’s Information
1. Personal Information
○ E-mail : yongtaek@snu.ac.kr
 
2. Education
○ B.S.: Seoul National University (Korea), Electronics Engineering, 1994
○ M.S.: Seoul National University (Korea), Electronics Engineering, 1996
○ Ph.D: University of Michigan, Ann Arbor (USA), Electrical Engineering and Computer Science, 2003
 
3. Experience
Associate Professor, School of EECS, Seoul National University (2010 R11; present)
Assistant Professor, School of EECS, Seoul National University (2006 R11; 2010)
Senior Research Scientist, Eastman Kodak Company (2003 R11; 2006)

 

Ph.D Research Assistant Tae Hoon Kim’s Information
1. Personal Information
○ E-mail : rhlight4@snu.ac.kr
 
2. Education
○ B.S.: Seoul National University (Korea), Material & Science Engineering, 2008
○ M.S.: Seoul National University (Korea), Material & Science Engineering, 2010

 

 

 




 



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Spring Semester of 2014’s Academic Excellence Awa... 2014-05-20
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Spring Semester of 2014’s Academic Excellence Award Ceremony
The Academic Excellence Award Ceremony was held by Seoul National University’s School of Engineering this past April 29.
11 out of the 92 scholarship winner attended the ceremony along with the Vice Dean of the School of Engineering.


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Seoul National University Professor Sung-Hoon A... 2014-05-07
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▲ Seoul National University School of Engineering Department of Mechanical and Aerospace Engineering Professor Sung-Hoon Ahn

 

On the 22nd, Seoul National University stated that Professor Sung-Hoon Ahn from the Department of Mechanical and Aerospace Engineering was named the Senior Editor of the International Journal of Precision Engineering and Manufacturing-Green Technology, IJPEM-GT. 
 
This journal is published through an agreement with the Korean Society of Precision Engineering and the German Springer Publishing company.  The journal was published in the Thomson Reuters International Journal Database SCIE on January 2014 through a short evaluation period.
 
This is a good opportunity to grow the international influence of Korean and international research.  Therefore, this first publication has a very big meaning.
 
Professor Ahn stated, “IJPEM-GT recently published an article about the energy saving environmentally friendly manufacturing research.  This will help our country become a leader in this area.”

Professor Ahn graduated from University of Michigan in the United States before graduating from Stanford University with a Ph.D in Aerospace Engineering.  He has been at Seoul National University since 2003 and won the Korean Society of Mechanical Engineers’ Baekam Paper Award in 2005, Korean Society of Precision Engineering Award in 2007, and Shinyang Engineering Award in 2010.

▲ International Journal of Precision Engineering and Manufacturing-Green Technology, IJPEM-GT



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Seoul National University Professor Byung-Dong... 2014-04-17
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▲ Seoul National University Mechanical and Aerospace Engineering Professor Byung-Dong Yoon
 


On the 7th, Seoul National University’s School of Engineering announced that Professor Byung Dong Yoon’s team from the Department of Mechanical and Aerospace Engineering won 2nd place in the 2014 PHM Data Challenge.  This was the first appearance by a Seoul National University team that led to the first win by an Asian team.  At the upcoming IEEE PHM in June, Professor Yoon’s team will present the results of their research.
 
PHM Data Challenge is a trouble detection and prognostics and health management contest held annually by the international ‘IEEE Reliability Society.’  The team that predicts the most reliable outcome from a given set of data wins the competition.
 
This year, the competition topic was in prediction the State of Health (SOH) and Remaining Useful Life (RUL).  Professor Yoon’s team used an equivalent circuit model for modeling and came up with a Nyquist diagram to successfully solve the problem.
In the past, only teams from the United States and Europe had placed at the competition, so this win was very extraordinary.  After becoming the first Asian team to place in the competition, the team received a proposition to work together by University of Maryland’s CALCE, among other international interest.
 
Even last year, Professor Yoon garnered interest after presenting his paper of suspension data and mechanical life diagnosis method that won the IEEE Reliability Society’s PHM paper award.  Through wind turbines, rotor systems, mechanical systems, and lithium-ion battery research, Professor Yoon’s team is leading the domestic PHM research in computer systems.
 
Professor Yoon stated, “I am proud of my team and students for placing so well in a competition full of American and European teams. I hope that we will continue to improve our research into PHM technology.”

 



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Seoul National University – Samsung Displa... 2014-04-16
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On April 2, Seoul National University and Samsung Display had a ‘Seoul National University R11; Samsung Display Cooperation’ meeting attended by SNU’s Research Director/Industrial Cooperation Director No-Hyun Sung, SNU Dean Kun-Woo Lee, Samsung Display Vice President Hak-Sun Kim, Display Center Chair (Electrical and Computer Engineering Professor) Ki-Woong Hwang, and associated professors.

 

Seoul National University’s Display Center (Head Ki-Woong Hwang) and Samsung Display will work together in industrial research and share technical skills to improve display technology through skilled manpower and research cooperation.  Display Center Head Ki-Woong Hwang and Vice President Hak-Sun Kim stated, “The cooperation between Seoul National University and Samsung Display will help us become the world best in the display technology and skills.  This will help us greatly in capturing world market share.”



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Seoul National University’s School of Engineering... 2014-04-16
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On March 28, Seoul National University’s School of Engineering and Hyundai Heavy Industries held a ‘2014 Seoul National University’s School of Engineering R11; Hyundai Heavy Industries Cooperation Agreement and Research Presentation’ with Dean Kun-Woo Lee and Hyundai Executive Jin-Soo Park.
 
The School of Engineering and Hyundai Heavy Industries agreed to work together in industrial cooperation, technology exchange, and human resources development to improve the output of the two institutions.  SNU will also contribute to the competitiveness in skill and future projects produced by Hyundai Heavy Industries.  This year, shipbuilding engineering, mechanical engineering, electrical engineering, computer engineering, chemical engineering, materials engineering, industrial engineering, and others will work together on 25 projects.
 
Dean Kun-Woo Lee stated, “Hyundai Heavy Industries and Seoul National University’s School of Engineering cooperation means that Professors of this university will be able to contribute to industrial projects.  This will be a new industrial model and will have great meaning for the future.” 
Hyundai Executive Jin-Soo Park continued, “Hyundai Heavy Industries believes that we can become even more competitive in the future with the outstanding research and manpower present at Seoul National University.”

The attendees at this meeting between Seoul National University’s School of Engineering and Hyundai Heavy Industries were Hyundai Executive Jin-Soo Park and 10 other executives and researchers from Hyundai as well as Dean Kun-Woo Lee and 11 other Vice-Deans and professors.

▲ SNU’s Dean Kun-Woo Lee, Hyundai Heavy Industries Executive Jin-Soo Park



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