Volume 58
Back to Newsletter List
Volume 58
June 20, 2019
Seminar Report
Seminar by Dr. Allard van Marle from UNIST in Shouth Korea
2019-06-20
Dr. Allard Jan van Marle visited ABBL and iTHEMS this week from his home institute of UNIST in South Korea. On Monday, June 17, he gave a seminar about his work in astrophysics, on particle acceleration and particle-shock interactions. This is a very difficult topic to study because of the very different scales (length, time, and energy) involved. Low-energy electrons and ions create the magnetic field turbulence that lets particle acceleration take place, so numerical simulations should resolve their motion. But accelerated particles have energies orders of magnitude higher, which means the numerical grid must be much larger to track them. Dr. van Marle presented a new numerical method that partially resolves this tension. This "particle in [MHD] cell" code averages out the majority of the low-energy electrons/ions, freeing up computational resources to track the higher-energy particles that are of more interest to most astrophysicists. Shock fronts are everywhere in the universe, but they come in a large variety of speeds, sizes, and locations. The work presented by Dr. van Marle will help to determine how (or if) all of these different shocks behave as natural particle accelerators.
Using combined Particles-in-MHD-Cells to model particle acceleration in astrophysical shocks
June 17 (Mon) at 14:00 - 15:00, 2019
Upcoming Events
Colloquium
Spacetime Geometry of Black Holes, Wormholes, and Time Machines
July 2 (Tue) at 15:30 - 17:00, 2019
Pei-Ming Ho (Distinguished Professor, Department of Physics, National Taiwan University, Taiwan)
Since the advent of General Relativity, people have found many solutions with interesting spacetime geometries. Most notably, the black holes have attracted a lot of attention for their roles in generating gravitational waves, and for inducing the information loss paradox. In this talk, we consider black holes amongst other geometric structures and investigate the subtlety involved in the quantum effect such as Hawking radiation. In this context, we mention wormholes and time machines, and explain how they are conceptually related to the geometry under the horizon of a black hole. There will also be comments on my recent research result about how quantum effect must be large for observers sitting on top of the black hole horizon.
Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria), RIKEN
Broadcast: R511, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN / SUURI-COOL (Kyoto), #204-205, 2F Maskawa Building for Education and Research, North Campus, Kyoto University / SUURI-COOL (Sendai), #303, 3F AIMR Main Building, Advanced Institute for Materials Research (AIMR), Tohoku University
Event Official Language: English
Workshop
1-day Workshop on Quantum Gravity
July 4 (Thu) at 9:30 - 18:00, 2019
In order to construct a quantum theory of gravity, it is currently required to study freely from various viewpoints. In this small workshop, we will discuss various different topics such as field theory, string theory, quantum black hole, quantum universe and so on, and will consider future directions to quantum gravity casually but deeply. Let's enjoy exciting discussions!
Venue: Seminar Room #132, 1F Main Research Building, RIKEN
Event Official Language: English
Workshop
SOKENDAI-iTHEMS Joint Workshop "Genetics meets Mathematics"
July 7 (Sun) - 8 (Mon), 2019
Jeffrey Fawcett (Senior Research Scientist, iTHEMS)
7月7,8日に総研大葉山キャンパス近くの研修施設レクトーレ葉山にて遺伝・進化の研究者と数学・物理の研究者の交流を深めることを目的としたインフォーマルなワークショップを開催します。
生物の知識が全くない（主に数学・物理の）研究者を対象とした、生命の分子レベルでの多様性を説明しうる集団遺伝や分子進化の理論などに関するレクチャーを行います。また、今後の相互作用の可能性がありそうなテーマに取り組む数学・物理の研究者にも講演していただきます。
参加費・宿泊費は無料（懇親会費を頂く場合があります）で、前日の7/6と7/7に会場の宿泊施設に泊まることが可能です。プログラムの詳細は今後変更する場合があります。
登録締切：6/24
（宿泊者数に限りがあるため早めに締め切る場合があります）
Organizers: Jeffrey Fawcett (RIKEN iTHEMS), Tetsuo Hatsuda (RIKEN iTHEMS), Shohei Takuno (SOKENDAI), Hideki Innan (SOKENDAI)
Venue: LecTore Hayama
Event Official Language: Japanese
Workshop
Workshop on Sine-square deformation and related topics 2019
July 11 (Thu) at 10:00 - 18:00, 2019
External Event
Interstellar Memes
July 25 (Thu) at 20:00 - 21:30, 2019
Don Warren (Research Scientist, iTHEMS)
Memes are to cultures what genes are to people: ideas, behaviors, or styles that are transmitted within the culture and can propagate or die out. The universe is a big place. How much of it knows about Grumpy Cat? Tale of Genji? Earth?
Cost: JPY1,500 including a drink
Venue: Good Heavens Bar (2F 5-32-5 Daizawa, Setagaya-ku, Tokyo 155-0032)
Event Official Language: English
Workshop
RIMS-iTHEMS joint WS on "Math of Jets"
July 29 (Mon) - 31 (Wed), 2019
Co-hosted by RIMS Kyoto University and iTHEMS RIKEN.
Venue: Kyoto University, Main Campus Research Bldg No 15, #201
Event Official Language: Japanese
Workshop
Math-Life Workshop
August 19 (Mon) - 20 (Tue), 2019
Organizers
Masaharu Nagayama (MSC, Hokkaido Univ.)
Tetsuo Hatsuda (iTHEMS, RIKEN)
Hiroshi Suito (AIMR, Tohoku Univ.)
Takayuki Sakajyo (SACRA, Kyoto Univ.)
Venue: 1F Seminar Room, Frontier Research in Applied Sciences Building, Hokkaido Univ.
Event Official Language: Japanese
If you would like to cancel your subscription or change your email address,
please let us know via our contact form.
Copyright © iTHEMS, RIKEN. All rights reserved.