last-modified : 2016.03.06
Profile
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!
안녕하세요. 블로그 잘 보고 갑니다.
저는 지금 이와테에서 경제공부하고 있는 유학생입니다.
지금 경제수학을 공부하고 있는 중인데, 대학원 진학을 위해서는 필수라서, 거의 10년만에 수학을 다시 공부 하고 있습니다.
그래서 조금이나마 도움을 바랄수 있을까 싶어서 일딴 친해지고 싶어서 이렇게 몇자 남겨 봅니다. 환절기에 건강 조심하시고 잘 부탁드립니다.
방문해 주셔서 감사합니다!
하지만 제가 도움을 드릴 수 있는 것이 있을 지는 잘 모르겠네요. 어쨌든 같은 유학생으로써 화이팅 합시다! ^^
wooou you’re so handsome…. are you korean?
yes, thanks! thank you for visiting my blog Irenne.
you’re welcome!!! honey!!
annyeong, wow i’ve seen ur profile..u’ve a really great education. i really proud of u. i would like to make u as my inspiration . can i ? hope we can going well together. i want to know u more.. kamsahamnida.. ~ppyeong~
thanks for visiting my blog, but I’m not that good for an inspiration to you hehe. anyway, nice to meet you aqilah!
Thanks for reply my comment… u’re good enough for me to make u as my inpiration.hehehe..sorry for my bad grammar. I’m from Malaysia *^▁^*
Good. (^口^)ﾉ
안녕하세요. 오사카 대학원에 대해 검색하다가 이 블로그 발견해서
코멘트 남깁니다. 실례가 되지 않는 다면 대학원 출원, 장학금 등에 여쭤봐도 괜찮을까요?
들러주셔서 감사합니다! 궁금하신 점을 구체적으로 메일로 보내주시면, 가능한대로 답변 드리겠습니다.^^
안녕하세요.
일본 국민건강보험 관련해서 검색하다가 들어왔습니다.
저는 2013년 10월부터 연구생이고,
내년 4월 동경공업대학 박사과정 진학할 예정인 학생입니다.
보험료가 생각보다 많아서요(연 2만엔 정도?)
연2만엔 정도가 보통이라고는 알고 있지만
혹시 방법이 있다면 알고 싶어서요. 어떻게 할인 받았나요?
혹시 알려주실 수 있나 해서 이렇게 글을 남겨봅니다.
감사합니다.
우선 들러주셔서 감사합니다^^
음 글쎄요, 저 같은 경우는 해당 시청(또는 구청)에 구구절절(?)하게 너무 비싸다고.. 안 깎아주면 탈퇴할 수 밖에 없다고.. 편지를 썼습니다. 뭐 그냥 편지는 아니고 건강보험료 책정 불복시 항의할 수 있는 健康保険料 不服申立 라는 형식이 아마 시청 홈페이지마다 있을 겁니다. 뭐 어차피 잃는 것이 없으니 한 번 보내보세요 ㅎㅎ
Hello 🙂 I saw you followed my Tumblr, thanks for that. I really like the photos you post on your Tumblr, keep it up. You have quite an interesting blog. By the way, I love some of the songs you covered with your band 🙂 how many instruments can you play? I play only piano but I would like to learn guitar too. cheers. 🙂
Thanks for visiting my blog Stellina! Sure, I’ll continue uploading my photos on the blog and Tumblr also, if time allows. I just can play keyboard instruments like a piano or a synthesizer. I would like to play the guitar, too, actually now I have an electric guitar but cannot play hehe.
wow! ur photos make me remember everything when we r young. Thus i wanna say something that help me to get S when u come back here as seoul museum boy. So u must keep in touch with s and me. Thx
thanks for the comment. I miss ur Dodongssi, so keep it up and take care of it every time, everyday.
Hello, I found your blog through tumblr and I find your experience very interesting. I am curious, are you doing your master’s in Japanese? English? and how was it? I am interested in doing a research exchange with a university in Korea (현재 구조공학원생입니다), but I only have a working knowledge of Korean.
Hi nice to meet you Anna. Yes, I’m currently MS candidate in Japan. Usually I speak in Japanese, but also in English sometimes. If you want to study in South Korea, you may get some information from the university websites.
캐논 85mm 렌즈 검색하다가 방문 했습니다.글 과 좋은 사진들 잘 보구 가구요~^^혹시 사진에 커서 가져다 대면 사진 정보 뜨는거 방법즘 알려주실 수 있으실까요?
안녕하세요 들러주셔서 감사합니다. 워드프레스나 티스토리의 경우 EXIF 플러그인을 다운받아서 설치하시면 돼요~
안녕하세요. 과제에 치이고 있는 대학생입니다. 맥북에서 여기를 들어오면 사진아 안뜨고 엄청 느리네요 구글크롬으로 들어와도 똑같네요 글도늦게뜨고 사진이 아예 안보입니다 왜 이런지 알수있을까요 김른님의 사진들을 볼수가없네요..
헛 그런가요 ㅠㅠ 참고로 제 면상은 볼게 못됩니다.
왜 공익 나오셨나요 (소곤소곤)