Hello World !

Profile

• Name : Leun. D. Kim (or Donghyun Kim)
• Sex : Male
• Blood Type : Type O
• Hobby : Music, Travel, Photos
• E-mail : kdh743 (at) gmail.com
• Blog : http://www.leunkim.com

Education

• The University of Tokyo, Ph. D, Mathematical Science, 2016 – .
• Osaka University, Master of Science (MS), Mathematics, 2012 – 2014.
• Sogang University, Bachelor of Science (BS), Mathematics, 2009 – 2012.
• Sogang University, Bachelor of Science in Electrical Engineering (BSEE), 2007 – 2012.

I am interested in the nonlinear partial differential equations, especially hyperbolic-type such as wave equations or Klein-Gordon equations. A list of courses which I have taken can be found Here .

Papers

• Donghyun Kim, A note on decay rates of solutions to a system of cubic nonlinear Schrödinger equations in one space dimension, Asymptotic Analysis 98 (May 2016), 79-90 (arXiv: 1408.6464).
• Donghyun Kim, A note on a system of cubic nonlinear Klein-Gordon equations in one space dimension, Differential Equations and Dynamical Systems (2016), 00-00 (arXiv: 1407.6658).
• Donghyun Kim, Global existence of small amplitude solutions to one-dimensional nonlinear Klein-Gordon systems with different masses, J. Hyper. Differential Equations 12 (December 2015), 745-762 (arXiv: 1406.3947).
• Donghyun Kim and Hideaki Sunagawa, Remarks on decay of small solutions to systems of Klein-Gordon equations with dissipative nonlinearities, Nonlinear Analysis 97 (March 2014), 94-105 (arXiv: 1307.7890).
• Donghyun Kim, Decay of solutions to systems of Klein-Gordon equations with dissipative nonlinearities, Master Thesis, Osaka University (February 2014).

Talks

• 若手研究者による実解析と偏微分方程式 2013 ,
  Osaka University, Osaka, Japan (November 30, 2013).

Honors and Awards

• Osaka University MiraiKikin, Graduate School of Science Scholarship, 2013–2014.
• Osaka University MiraiKikin, Graduate School of Science Scholarship, 2012–2013.
• Sogang University, Honors Scholarship (AA), 2011.
• Sogang University, Honors Scholarship (A), 2010.

Experience

• Hankuk University of Foreign Studies, Public Service Worker, Sep. 2015 – Mar. 2016.
• Seoul National Science Museum, Public Service Worker, Mar. 2014 – Sep. 2015.
• Teaching Assistant (Calculus B), Osaka University, Japan, Oct. 2013 – Feb. 2014.
• Teaching Assistant (Calculus A), Osaka University, Japan, Apr. 2013 – Aug. 2013.

Activities in Music

• Keyboardist in Band ‘Aramir’ (2007. 5 ~ 2008. 12)
  • Concert in Club CJHR (2007. 8)
  • Participation in Sogang University Festival (2008. 10)
  • Concert in Live Club SPOT (2008. 12)
• Keyboardist in Melodic Speed Metal Band ‘Antimatter’ (2008. 8 ~ 2009. 3)
  • Festival in Sangmoon High School (2008. 10)
  • Festival ‘Diving Goolby’ in Seoul National University (2008)
• Keyboardist in Melodic Speed Metal Band ‘Lucifer Effect’ (2009. 3 ~ 2011. 12)
  • Concert in Club Rolling Stones in Sinchon (2009. 7)
  • Concert in Club DGBD in HongDae (with Mutant and D.Cay) (2010. 6)
  • Concert in Queen Live Hall (2011. 9)

We could have completely covered some melodic speed metal songs, for example, Dragonland – The Neverending Story, Stratovarius – Eagle Heart, Kamelot – Forever, Revolution Reneissance – Last Night on Earth, Iron Maidon – Fear of the Dark, Sonata Arctica – My Land, 어둠 – 수묵화, Gamma Ray – Heaven can wait, 403 – Southern Cross, Black Sabbath – Heaven and Hell, Sonata Arctica – Full Moon, Broken, Helloween – Before the War, Helloween – A Tale that wasn’t Right, Stratovarius – Stratosphere, Rhapsody – Emerald Sword and so on. Also we have composed songs in this style, for example, “Running bi-car” and so on.

• Kinosaki Onsen (2014. 3)
• Okinawa (2014. 3)
• Whole Japan (2009. 8) : Fukuoka, Hiroshima, Osaka, Kobe, Tokyo, Hachinohe, Aomori, Hakodate, Sapporo.
• Hongkong (2006. 12)
• Western Europe (2004. 12)
• Tokyo, Japan (2006. 12)
• Chingdao, China (2007. 7)
• Whole South Korea (2007. 9)
• Beijing, China (2007. 7)

click to enlarge!