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214 ニュース
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2024-12-16
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The second internal meeting of RIKEN Quantum on December 6, 2024
On Dec. 6 (Fri), the second internal meeting of RIKEN Quantum was held at Room 359, Main Research Building, RIKEN (Wako), attended by over 40 RIKEN Quantum members and related researchers. At this meeting, Yantao Wu, Himadri Pathak, and Xiaoyang Wang who have become RIKEN Quantum researchers this fall gave presentations on their recent research. In addition, 8 researchers from outside RIKEN who have become RIKEN visiting scientists in September to conduct collaborative research proposals also gave short talks to introduce themselves. They had a very lively discussion that will deepen understanding of their research. During the banquet following the meeting, participants deepened exchanges in a relaxed atmosphere and engaged in various conversations that will lead to the future development of RIKEN Quantum's activities.
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2024-11-26
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Farewell message from Shingo Gibo
Our colleague Shingo Gibo will move on to a new career as senior researcher at Institute for Basic Science (IBS), South Korea as of December 1, 2024. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Shingo Gibo: I joined iTHEMS in September 2018 and spent six years as a postdoctoral researcher at iTHEMS. During this time, I have theoretically studied biological oscillations with Kurosawa-san. Additionally, I collaborated on interdisciplinary research on waveforms in circadian clocks with physicists, Hatsuda-san and Kunihiro-san. I would like to thank all the members for the valuable discussions and support. I have learned a lot and truly enjoyed my time at iTHEMS. From December, I will be moving to Institute for Basic Science (IBS) in South Korea as a senior researcher. Thank you for the great six years and see you again!
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2024-11-12
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Farewell message from Yaokun Lei
Our colleague Yaokun Lei will move on to a new career as associate research fellow at Shenzhen Bay Laboratory, China as of November. 11, 2024. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Yaokun Lei: I joined iTHEMS last August. Although it’s a short time, it has been a truly enriching experience to be a part of iTHEMS. The support and collaborative spirit here have been invaluable, and I am especially grateful for the guidance and help from Hatsuda-san and Sugita-san, whose encouragement has greatly impacted this journey. I am thankful for the friendships and knowledge shared, and as I step forward, I carry with me not only the insights from my research but also the inspiration from our exchanges. I hope our paths cross again in future collaborations. Thank you all for everything, and wishing you continued success and discoveries.
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2024-10-16
ホットトピックRIKEN Quantum Workshop on “Quantum-Like Modeling in Cognitive & Social Sciences" on October 11, 2024
On Oct. 11 (Fri), RIKEN Quantum Workshop on “Quantum-Like Modeling in Cognitive & Social Sciences” was held at Room 359, Main Research Building, RIKEN (Wako). The workshop was hosted by RIKEN Quantum and had 30 participants from a variety of fields, including cognitive and social sciences as well as life sciences, mathematics, and physics. This was the first workshop at RIKEN to discuss “Quantum-Like Modeling” for various phenomena in cognitive and social sciences. “Quantum-Like Modeling” suggests that using quantum probability calculus and its applications could be useful to rationalize cognitive and social phenomena as open quantum systems and expand previous understandings, obtained through simple linear algebra, by applying quantum formalizations. After Atsushi Iriki, one of the organizers, explained the purpose of the workshop, there were four invited talks. Andrei Khrennikov gave a comprehensive talk on applications of the methodology and formalism of quantum theory outside of physics, in cognition, psychology, decision making, social and political sciences, economics and finance, genetics and evolutionary biology. Masanao Ozawa gave an introduction to his proposed quantum instrument theory, which unifies quantum measurement and quantum cognition through quantum simulation. Haruki Emori talked about applications of quantum computers to cognitive sciences based on the quantum instrument theory. Finally, Miho Fuyama introduced her empirical research on subjective experiences and superposition states of quantum probability theory in narrative reading. These invited talks were followed by a general discussion and networking mixer, which deepened understanding of “Quantum-Like Modeling” in cognitive and social sciences from various perspectives and promoted new networking among the participants.
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2024-10-09
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Report on the induction ceremony of American Academy of Arts and Sciences
Tetsuo Hatsuda attended the induction ceremony of the American Academy of Arts and Sciences [1], held in Cambridge, Massachusetts, from September 29 to October 1, 2024, as a newly elected International Honorary Member (HIM). This year, 250 new members were inducted, including 25 HIMs [2], across various fields such as Mathematical and Physical Sciences, Biological Sciences, Social and Behavioral Sciences, Humanities and Arts, and Leadership, Policy and Communications. The ceremony began with a gathering of new members at the House of the Academy [3]. The formal induction took place on September 30 at Sanders Theatre, Memorial Hall at Harvard University [4], starting at 3 p.m. During the ceremony, each inductee was called to the stage individually to sign the Academy members’ book. In addition to the induction ceremony, there were receptions on September 29 and 30. The event concluded with a special lecture titled "Memory is about your future – what we think we become," delivered by André Fenton. In the photograph, Tetsuo Hatsuda is seen on the left signing the Academy's book. On the right, he is pictured conversing with Bonnie Fleming [5], a fellow inductee in physics and a neutrino experimentalist from Fermilab. Throughout the meeting, Tetsuo enjoyed engaging in conversations not only with fellow physicists but also with researchers from the social sciences and humanities.
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2024-10-08
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Presentation of iTHEMS outreach at NuFACT conference
iTHEMS is a fantastic environment in which we conduct interdisciplinary research daily. Along with our research activity, a variety of outreach activities have been conducted so far. Tomoya Nagai (Coordinator, iTHEMS) presented this special environment and its outreach activity at the NuFACT 2024 conference. At the conference, a session for Inclusion, Diversity, Equity, Education, and Outreach (IDEEO) was composed. The session itself was organized so that we could visualize diversity in terms of speaker's and convener's properties. It provided us with a good opportunity to know IDEEO-related activities all over the world, which can be a chance to recognize and reconsider the issue around to achieve "good environments for everyone". One special example of the iTHEMS outreach was the "Journalist in residence" program. The uniqueness of the activity caught significant attention from the participants of the conference. Also, "Mathematics Connecting to the World: One S&T poster for Every Household" seemed to be intriguing. Although we had only a limited time for this exhibition and discussion, Nagai's attendance brought the conference a fresh view of the outreach activity as well as the achievements of the interdisciplinary and diverse environments. iTHEMS can be so influential to our community in multiple contexts!
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2024-10-02
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RIKEN - LBNL Workshop on Quantum Information Science on September 3-6, 2024
On Sep. 3 (Tue) - 6 (Fri), RIKEN - LBNL Workshop on Quantum Information Science was held at Lawrence Berkeley National Laboratory (LBNL). The workshop was co-hosted by RIKEN-iTHEMS and LBNL and sponsored by RIKEN Quantum, with 32 and 40 participants from Japan and USA, respectively. This was the second in-person workshop by RIKEN and LBNL on quantum information science since the first was held at LBNL in January 2019 before the Covid-19 pandemic. The purpose of the workshop was to bring together researchers worldwide to discuss and collaborate on the latest developments in quantum technologies and quantum computing including algorithms, hybrid quantum-classical computing, error mitigation, and applications in physics and chemistry. There were 36 talks and 4 poster presentations during the entire four days. In the afternoons of the second and third days, in addition to tours of LBNL's Advanced Quantum Testbed (AQT) and National Energy Research Scientific Computing Center (NERSC) facilities, special sessions delved into discussions on several focus areas and provided networking opportunities for future collaborations.
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2024-09-27
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Farewell message from Eiji Inoue
Our colleague Eiji Inoue will move on to a new career as an assistant professor at Kyoto University as of Oct. 1, 2024. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Eiji Inoue: I spent three and a half years in iTHEMS as an SPDR on math. I would like to thank the program director and assistants for their mindful support over these three and a half years. I also wish to thank iTHEMS members for discussion on many occasions. These years I spent in iTHEMS were invaluable for me. Among all, the best experience for me was that I could gradually get a feeling on "physics in the real world" not only mathematical structure of physics, from the choice of words physicists use in daily discussion. In these casual discussions, I could also try if my understanding of physics are correct. I also enjoyed playing quantum computers. I think it was impossible to experience without this tolerant environment of iTHEMS; indeed, it just started from a casual conversation with the director. It was the first time I experienced quantum phenomena, especially quantum entanglement, in the real world where I exist. This may sound a little strange, but I feel like I haven't had that feeling of interest in how the real world works in a long time. While I was going through these experiences like a newborn child, as a mathematician, I could finally achieve my original project on Perelman entropy in the last half year during my visits to Cambridge, Montreal and Aarhus. There are still many thigs to do, but this is certainly the foundation of this new theory. One regret is that I could not finish writing a paper on this result while enrolled at iTHEMS. I'll be an assistant professor at Kyoto University (Department of Math) from October. I welcome people from iTHEMS to come to Kyoto and discuss. I will also ask iTHEMS for help. See you again!
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2024-09-24
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Farewell message from Kazuki Kannaka
Our colleague Kazuki Kannaka will move on to a new career as an assistant professor at Kanazawa University as of Oct. 1, 2024. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Kazuki Kannaka: At iTHEMS, thanks to the support from Hatsuda-san, Tada-san, Tsuboi-sensei, and all the assistants, I was able to focus on my research in a wonderful environment. During this period, I made several discoveries that were interesting at least to me. Also, discussing with researchers from other fields at iTHEMS was exciting. I am especially grateful to Namba-san and Iritani-san for providing the opportunity for such discussions. I look forward to continuing our research exchanges. Thank you!
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2024-09-10
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Farewell message from Keita Mikami
Our colleague Keita Mikami will move on to a new career as an assistant professor at University of Hyogo as of Oct. 1, 2024. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Keita Mikami: My five and a half years at iTHEMS have been truly outstanding. The environment here has been exceptional, significantly enriching my research in many different ways. One of the key highlights has been the stimulating and insightful discussions with researchers from diverse fields. Furthermore, my experiences working on MACS, organizing math seminars, and coordinating other events such as SSP have been invaluable. My research visit to UCB was also an incredible experience. I would like to extend my sincere gratitude to all the researchers and assistants at iTHEMS. I am especially grateful to the director, Hatsuda-san, for his unwavering support.As I move forward, I hope to continue interacting with the iTHEMS community, albeit in a new capacity. Once again, thank you for these five wonderful years.
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2024-08-27
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Farewell message from Takeru Yokota
Our colleague Takeru Yokota will move to RIKEN Quantum Computer Center (RQC) starting from September 1, 2024, and will then be posted to a University as a faculty member as of April 1, 2025. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Takeru Yokota: I am grateful for having spent the past three and a half years in an environment where I could focus on research at iTHEMS. Engaging in discussions with researchers from various fields of mathematical sciences has been a valuable experience. I would like to express my deep appreciation to the director, Hatsuda-san, the staff, and the assistants who created such a wonderful environment, as well as to the members who engaged in these valuable discussions. I look forward to continuing my interactions with the members of iTHEMS in the future.
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2024-07-26
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SLMath Summer Graduate School "h-principle" on July 1, 2024
The SLMath Summer Graduate School "h-principle" Sendai 2024 was held from July 1 to July 12, 2024 at TOKYO ELECTRON House of Creativity (Chi no Yakata) in Katahira Campus of Tohoku University. This two weeks lomg summer graduate school was organized by Simons Laufer Mathematical Sciences Institute (SLMath) and RIKEN iTHEMS, and coorganized by Mathematical Science Center for Co-creative Society (MathCCS) and Tohoku Forum for Creativity (TFC) of Tohoku University. There were 18 graduate students from the supporting institutions of SLMath and 12 graduate students from Japanese universities. There were four courses consisting of five 90 mintes lectures given by Emmy Murphy (Toront University), Dominik Inauen (Leipzig University) and Takashi Tsuboi (RIKEN iTHEMS / Tohoku University). The titles of lectures were "h-principles in smooth topology" by Emmy Murphy and "Riemannian geometry and applications to fluid dynamics" by Dominik Inauen in the first week, and "Contact and symplectic flexibility" by Emmy Murphy and "Foliation theory and diffeomorphism groups" by Takashi Tsuboi in the second week. We took video of the lectures and it can be seen later from the website of SLMath. There were 4 teaching assistants, Toru Yoshiyasu (Kyoto University of Education), Noboru Ogawa (Tokai University), Masato Ogawa (Tohoku University) and Sonia Mahmoudi (SUURI-COOL Sendai, Tohoku University) who took care of the 30 graduate students. Some details can be seen at SLMath website. The staffs of RIKEN iTHEMS, SUURI-COOL Sendai and MathCCS supported this summer graduate school for all the time, and all the participants are realy grateful for their help. TOKYO ELECTRON House of Creativity is really a nice place for the discussions in front of blackboards, and the house was filled with the discussions among the participants for 9:00 - 17:30 and some of the discussions continued in the meeting room in the hotel. The welcome party and the farewell party of Summer Graduate School were held jointy with the participants of G-RIPS Sendai 2024 which went on at MathCCS and which iTHEMS is cohosting. Reported by Takashi Tsuboi
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2024-06-26
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先生、「空間」は何次元ですか!? ── 理論物理学者・野村泰紀に訊く素粒子〜宇宙スケールで捉える「空間」の正体
雑誌『WIRED』日本版VOL.53では総力を挙げて「空間」×「コンピューティング」の可能性を掘り下げているが、肝心の「空間」自体は、どう定義すればいいのだろう。生半可な掘り下げでは、生焼けになることは目に見えている。ここはぜひ、当代屈指の理論物理学者の叡智に与りたい。というわけで、米国・カリフォルニア大学バークレー校（UC Berkeley）物理学部棟の4階にある、野村泰紀のオフィスを訪れた。野村先生、「空間」とは一体、何なのでしょうか? 空間とは何か ──。 この問いは、現代物理学の進展に直接関係してきた命題です。現代物理学は「空間と時間を理解する学問」であったと言ってもいいくらいです。ですので、わたしの専門である量子重力理論の観点から話を進める前に、まずは物理学と空間の関係性をダイジェストでお伝えしたいと思います。 続きは関連リンクからWIREDのサイトをご覧下さい。
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2024-06-12
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Faculty of Science 2023 Year in Review: Catherine Beauchemin
Catherine Beauchemin(Deputy Program Director, iTHEMS) was interviewed by the Toronto Metropolitan University about her interdisciplinary research and its impact. For a physics professor, Catherine Beauchemin certainly gets involved in biology research more than you might expect. Her embrace of interdisciplinarity has taken her to many places, currently to Japan, where she is serving as Deputy Program Director of the Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS) programme at RIKEN, Japan's largest research institute. One of the best aspects? “My position allows me to host TMU trainees in Japan and expand their research and life horizons.” Please see the related links for more details.
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2024-05-29
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Event report: OIST x iTHEMS Workshop Series 1
Renowned globally for its eminent scientists and cutting-edge infrastructures, RIKEN is the largest Japanese research organization in basic natural sciences. This distinction renders RIKEN a very attractive partner for OIST, a burgeoning research-oriented university. Cementing their collaborative endeavorsm, both institutes signed bilateral agreements including a MoU in 2020-2021, triggering and facilitating ambitious projects and fostering new collaborations. Among these, RIKEN Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) has emerged as a dynamic hub for active collaboration with OIST. The workshop “OIST x iTHEMS Exploring the Mysteries of the Universe and Life - Series 1 | Cosmic ray and Life project” held at OIST on March 4-6 may be one best example of the type of brainstorming needed for addressing the most challenging questions. To read more, please visit the related link.
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2024-04-28
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初田プログラムディレクターがアメリカ芸術科学アカデミー外国人名誉会員に選出
2024年4月24日にアメリカ芸術科学アカデミーは250名の会員（25名の外国人名誉会員）の選出を発表し、理化学研究所数理創造プログラム(iTHEMS)の初田哲男プログラムディレクターが外国人名誉会員に選出されました。米国芸術科学アカデミーは1780年に設立された米国最古のアカデミーであり、アカデミーのミッションは以下のように述べられています。"1780年に設立されたアメリカ芸術科学アカデミーは、卓越性を称え、人類のあらゆる分野のリーダーを招集し、新しいアイデアを検討し、国家と世界にとって重要な問題に取り組み、「自由で独立した有徳な国民の利益、名誉、尊厳、幸福を増進する傾向にあるあらゆる芸術と科学を育成する」ために協力している。" アカデミー会長のデビッド・オクストビー氏は以下のように語っています。「私たちは、芸術家、学者、科学者、公共、非営利、民間部門のリーダーたちの功績と、新たな高みに到達するために必要な好奇心、創造性、勇気を讃えます。私たちはこれらの傑出した人々に、深刻な課題に対処し、共通利益を促進するためのアカデミーの活動に参加するよう招待します。」 理化学研究所から、 これまで有馬朗人氏（元理化学研究所理事長）、 野依良治氏（元理化学研究所理事長）、竹市雅俊氏（元発生・再生科学総合研究センター長）、横山茂之氏（元生命分子システム基盤研究領域長）らが選出されています。今回は、日本から初田哲男（理研数理創造プログラムディレクター）と熊倉功夫氏(国立民俗学博物館名誉教授）の２名が選ばれています。任命式は、９月２１日にマサチューセッツ州ケンブリッジで行われる予定です。 初田哲男プログラムディレクターからのコメント 「今回アカデミーの外国人名誉会員に任命して頂き大変名誉に感じます。さまざまな分野の諸先輩方と協力して、人類の幸福と科学の発展に貢献できればと思います。」
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2024-04-28
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「理研DAY：研究者と話そう！」で学習資料「一家に１枚 世界とつながる”数理”」を紹介
理化学研究所広報室が毎月開催している「理研DAY：研究者と話そう！」に学習資料「一家に１枚 世界とつながる”数理”」制作チームを代表して、永井智哉 コーディネーター、熊倉大騎 大学院生リサーチ・アソシエイトがフリーアナウンサー／数学コミュニケーターの篠崎菜穂子とともに出演し、ポスターやそれぞれの普段している仕事および研究の内容についてお話をしました。ZOOM最大78名、YouTube最大同時接続数66と計144名の方に参加いただき、ZOOM参加者は小中学生と一般50代以上がそれぞれ37％をしめるような構成でした。小学生からの「世界の全てが数理で表せるのですか」といった鋭い質問など多くの質問が寄せられ、大変楽しく進行することができました。
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2024-04-17
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「科学技術週間」記念講演会を自由民主党本部で開催
自由民主党本部で4月11日に開催されました「科学技術週間」記念講演会に、学習資料「一家に１枚 世界とつながる”数理”」を企画・監修した数理創造プログラム（iTHEMS）が招かれ、「一家に１枚 世界とつながる”数理”」の制作報告とiTHEMS若手研究者の関連研究紹介をしました。 講演会の司会進行は、山田 賢司 文部科学部会長が務められ、冒頭、渡海紀三朗 政務調査会長、大野敬太郎 科学技術・イノベーション戦略調査会長、今枝宗一郎 文部科学副大臣からご挨拶をいただきました。 講演会には、自民党学生部の皆様も参加いただきました。 プログラム： 報告：学習資料「一家に1枚 世界とつながる“数理”」について 仲 真紀子 理化学研究所理事 永井 智哉「一家に1枚“数理”」制作チーム代表、iTHEMSコーディネーター 記念講演：理研iTHEMS若手研究者の関連研究紹介 （コーディネーター）初田 哲男 数理創造プログラムディレクター 「量子の世界を解き明かす：観測とAIによるアプローチ」松浦 俊司 上級研究員 「生物多様性の数理」入谷 亮介 上級研究員 「X線で観る宇宙」辻 直美 客員研究員 「細菌性疾患のデジタル健康地図作成における数理基盤」熊倉 大騎 大学院生リサーチ・アソシエイト
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2024-04-11
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Kyoto University SACRA-RIKEN iTHEMS Special Lecture by Prof. Tadashi Tokieda by Tadashi Tokieda on March 28, 2024
2024年3月28日、東京駅前の京都大学東京オフィスにて、時枝正氏（スタンフォード大学数学科教授）による公開講演会「逆撫での力学」が開催されました。 これは京都大学SACRA(サイエンス連携探索センター）と理研iTHEMSの共催による特別講演会です。 講演会には、孫正義財団生をはじめ、学術機関、企業の方々など50名以上の多様な参加者があり、時枝氏による、数々のデモンストレーションを交えた散逸や非線形性を持つ力学の興味深い世界への導入と、講演後の活き活きとした質疑を楽しみました。 2024年2月9日にプリンストン高等研究所で行われた時枝氏による同じ講演が下記の関連リンクよりご覧いただけます。 SACRA-iTHEMS Lectureを見逃した方はこちらからご覧ください。
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2024-04-11
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TadaFest 2024: Toward understanding of the Origin of Spacetime by Dr. Tsukasa Tada on April 2, 2024
On April 2, 2024, TadaFest2024: Toward Understanding of the Origin of Spacetime, was held at the Okochi Hall. Following an inspiring keynote lecture by Tsukasa Tada (iTHEMS deputy program director) on the past and future research into the emergence of spacetime, four frontline researchers gave special talks on the holographic principle, the uncertainty principle, the spintronics, and the matrix model for spacetime. The meeting was well attended face-to-face and led to a lively discussion on the fundamental principles of physics.
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2024-04-11
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iTHEMS Starter Meeting for FY 2024 on April 5, 2024
On April 5, 2024, the annual iTHEMS Starter Meeting was held in the iTHEMS Common Room. More than 80 people attended, including face-to-face and via Zoom. iTHEMS Programme Director Hatsuda gave an overview of iTHEMS, followed by self-introductions by new and current members. As the new academic year begins, we are looking forward to further interactions across disciplines and the development of great science.
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2024-04-02
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一家に1枚「世界とつながる“数理”」ポスターが公開されました
文部科学省が毎年4月の科学技術週間にあわせて制作する学習資料「一家に1枚」について、2024年度版のテーマとして理化学研究所数理創造プログラム（iTHEMS）が企画した「世界とつながる“数理”」が選ばれ、2024年3月25日にダウンロード用画像が文部科学省の科学技術週間のページに公開されました。ポスターは全国の小学校、中学校、高等学校、大学等に配布されている他、今後、科学館や博物館などでも配られる予定です。また、紙面の内容をより掘り下げた特設ウェブサイトも公開する予定です。「数学を道具として使うこと」で世界のものごとを理解したり答えを出したりする「数理」をテーマに、数理が私たちの生活でどのような形で使われているのかを、様々な事例をもとに紹介しています。
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2024-03-27
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Farewell message from Mizuki Oikawa
Our colleague Mizuki Oikawa will move on to a new carrier (JSPS Research fellow (PD)) at University of Tokyo as of April 1st. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Mizuki Oikawa: I spent three years at iTHEMS as a Junior Research Associate (JRA) for the first two years and a student trainee for the whole three years. It was a great experience that I could communicate with researchers with various backgrounds. Moreover, it was wonderful that iTHEMS gave me chances not only to talk about my research but also host some seminars. I am fortunately going to be a visiting researcher and looking forward to seeing you again soon.
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2024-03-23
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Farewell message from Akira Harada
Our colleague Akira Harada will move to National Institute of Technology (KOSEN), Ibaraki College as an Assistant Professor, starting from April 1, 2024. We all will miss him and wish him success in his new affiliation! Here is a message from Akira Harada: For these three years, I have had a very happy time as an SPDR in iTHEMS. It was an invaluable experience to talk with various people and diverse fields and topics. Events like public outreach and Super Smash Problem have been my good memories, and I feel they have provided me a good nourishment. Thanks to such opportunities and the environment for unrestricted research, I feel I have taken a step forward as a researcher. iTHEMS is very comfortable and hard to leave, but I will take further steps in my new workplace. I express my gratitude to the program coordinators, colleagues, and assistants who have engaged in various discussions and provided support. I would be grateful to keep in touch with iTHEMS members in the future.
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2024-03-13
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Farewell message from Hidetoshi Taya
Our colleague Hidetoshi Taya will move to Department of Physics, Hiyoshi Campus, Keio University as an Assistant Professor, starting from April 1, 2024. We all will miss him and wish him success in his new affiliation! Here is a message from Hidetoshi Taya: It was truly one of the greatest experiences in my whole life to be able to enjoy science at iTHEMS for four years (including the one year in 2017 as a JSPS posdoc, before joining as an SPDR from 2021). All iTHEMS researchers are so talented and have a broad interest in science, covering almost all topics of science, not only physics, but also mathematics, biology, computational science, etc. The scientific discussions in iTHEMS, therefore, have always been extremely interesting and useful. iTHEMS also gave me a unique opportunity to enhance collaborations through the Working/Study Group program, which I used with NEW (Non-Equilibrium Working Group) and the Theoretical Physics Study Group, and I have learned and enjoyed a lot through their activities. I would like to take this opportunity to express my deep gratitude to the director, Hatsuda-san, the deputy directors, and the assistants, who did/do/are making enormous efforts to achieve the great environment of iTHEMS. Finally, I sincerely hope that iTHEMS will continue to develop and expand its presence, and I look forward to continuing to collaborate and enjoy science with iTHEMS researchers. Thanks for the great four years!
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2024-03-07
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理化学研究所-奈良女子大学理学部合同 ダイバーシティ推進ワークショップ2024が開催されました
2月29日と3月1日の2日間、奈良女子大学の数学、物理学、化学、生物学、環境科学など異なるコースの学生たち（学部2回生/3回生/4回生、大学院修士1回生/2回生の合計23名）が理研の東研究室 (CPR)、武石研究室 (CBS)、iTHEMS、 RIBF施設、佐甲研究室(CPR)を訪問しました。それぞれの研究室で、最先端研究の一端に触れるとともに、夕方からの理研研究者との交流会では、より深く研究内容について質問したり、研究者の日常を知る機会も設けられました。 このダイバーシティ推進活動は、奈良女子大学理学部と理研iTHEMSが共同で推進するリケジョ育成事業の一環として、奈良女子大学での連続講義とセットで行われているもので、次年度以降も継続する予定です。
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2024-01-30
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iTHEMSが孫正義育英財団生との交流会を開催しました
理化学研究所（理研）数理創造プログラム（以下、iTHEMS）は12月7日（木）に、将来を担う若手人材育成の一環で、孫正義育英財団生との交流イベントを初めて開催しました。数学や物理、生物、AI等に興味を持つ9歳から26歳までの財団生13名と、iTHEMS研究者10名が参加し、ハイレベルなディスカッションを繰り広げ、交流を深めました。 詳細は、下記の本文をご覧下さい。
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2024-01-30
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ワークショップ「開放量⼦系の数理による⽣物･認知･社会現象の理解」が2024年1月26日に開催されました
2024年1月26日（金）9:30 - 17:00に「開放量⼦系の数理による⽣物･認知･社会現象の理解」と題したワークショップをiTHEMS、RIKEN Quantum、JST-CREST「マルチセンシング」領域の共催により大河内記念ホール（及びZoomのハイブリッド形式）にて開催しました。 冒頭、JST-CREST「マルチセンシング」領域の研究総括である入來篤史氏（理研）から本ワークショップの趣旨説明が行われ、引き続き初田哲男氏（理研）からRIKEN Quantumで利用可能な各種量子コンピュータなどについての紹介がありました。その後、⻄郷甲矢人氏（⻑浜バイオ大）から「JST-CREST 課題を中⼼に Open Quantum System 全体の概観を解説」と題した講演があり、量⼦論的数理を⽤いた⼀般現象のモデリング・解釈の可能性と期待について討論が行われました。引き続き小澤正直氏（中部大）からは「⾮可換な順序効果の理論とブレークスルーにおける新しい数学理論」について講演があり、実験家と数学者との相補的共働のデザインと「新しい数学」の創造について討論が行われました。 昼休みを挟み、磯村拓哉氏（理研）から「ベイズ推論変分⾃由エネルギー原理における経路積分的⼿法」について講演があり、⽣物学・脳神経科学・認知科学と精神医学における量⼦論的解釈について討論が行われました。引き続き⽥中彰吾氏（東海大）からは「原⼦論的⼈間観から量⼦メタファーによる⼈間と社会の理解へ」と題した講演があり、⼈⽂社会科学における量⼦的現象と量⼦計算の社会実装の可能性について討論が行われました。最後には「⼈間現象」の進化／歴史の経路積分･量⼦論的解釈と”Quantum-Like Modeling”について総合討論が行われました。 現地及びオンライン合わせて約70名の参加者があり、人文社会科学分野における諸現象の量子論的解釈や量子計算の可能性について意欲的な討論が行われました。
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2024-01-26
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Seoul National University student group visited iTHEMS on January 10, 2024
1月10日（水）、ソウル大学（SNU）の学生グループ「GLEAP」の一行22名が、同大学生物科学部自然科学科のJi-Young Lee副学部長に引率され、iTHEMSを訪問しました。メンバーは学部2年生から4年生まで、数学、化学、生物学、物理学、統計学など幅広い分野の学生でした。iTHEMSへの訪問は、将来の進路や研究の方向性を検討するため、数日間にわたり日本の様々な大学や研究機関を訪問するツアーの一環です。 理研に到着した一行は、iTHEMSのメンバーである金 東昱とカトゥリン・ボシゥメンの出迎えを受け、まず仁科センターのイオンビーム加速器を見学しました。次に、iTHEMSのコモンルームで軽食をとりながら、ごく短時間のカジュアルな会話を楽しみました。カトゥリン・ボシゥメンは、SNUの学生が将来iTHEMSのメンバーになるための様々な機会（JRA、IPA、SPDR、RS/SRSなど）について5分間紹介しました。さらに、6名のiTHEMS研究者（金 東昱、辰馬 未沙子、田中 章詞、カトゥリン・ボシゥメン、シュテッフェン・バッケス、難波 亮）がそれぞれの研究について12分間の講演を行いました。その後、数名のiTHEMSメンバーも加わり、学生とiTHEMSメンバーがそれぞれ簡単に自己紹介と研究テーマについて話し、軽食を食べながら、iTHEMSのメンバーとSNUの学生との間で興味深いカジュアルなディスカッションが続きました。学生たちは、iTHEMSを訪問し、iTHEMSのメンバーが行っている幅広い研究について学ぶことができ、とても楽しかったと話してくれました。全体として、将来のアカデミックキャリアを考えている若い研究者にiTHEMSメンバーの研究を紹介する素晴らしい機会となりました。 iTHEMSのアシスタントの皆さん、時間を割いてこのイベントに参加し、学生にとって興味深いものにしてくれたiTHEMSの研究者の皆さん、そして特に、SNUの卒業生である金 東昱に感謝します。 Reported by Catherine Beauchemin
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2024-01-22
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2024年1月12日-14日にアートイベントDIG SHIBUYAでBlack Hole Recorderが展示されました
iTHEMSは、外部クリエイターと2021年に制作した、量子ブラックホール理論に基づくサイエンスアート作品「Black Hole Recorder」を、アートイベント“DIG SHIBUYA”内のプログラムとして、1月12日(金)から14日(日)の3日間、渋谷区立勤労福祉会館にて展示しました。全体のイベントはSHIBUYA CREATIVE TECH実行委員会が渋谷区と共催で開催したもので、「Black Hole Recorder」は連携プロジェクトとして公募で採択されました。 展示は部屋を暗い空間にして、まん中に「Black Hole Recorder」を設置し、お客さんを懐中電灯で足元を照らしながら入場いただいて、説明と共に作品を鑑賞いただきました。会場全体が実験空間であり、「Black Hole Recorder」により会場の音は常に全て記録されています。また今回はじめて、過去に「Black Hole Recorder」が展示された実験空間そのものを環境音として記録したデータを聞いていただくブースを設けて、過去の空間に耳を傾ける体験も楽しんでいただきました。 多くの人が集まる渋谷という街中にある施設での開催ということで休みの日は多くのお客さんに鑑賞・体験いただくことができました。時間帯によっては場内がかなり混み合うこともありました。アート作品を通じることで、ブラックホールそしてその理論を知って関心をもっていただき、多くの来場者(のべ300名近く)にブラックホールというものをイメージして帰っていただけたと思います。研究者の横倉祐貴研究員や初田哲男プログラムディレクターによる黒板を使った詳細な理論の説明も好評でした。人類の音をはるか未来に届けるべく、将来的には記録された音をブラックホールに電波で送る計画に関しても、時間とスケール感から反応がよかったです。街中でのアートイベントへの出展は、サイエンスに普段はあまり関心がない方々にも研究成果を届ける機会となり、今後の進展への手応えを感じるものとなりました。
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2023-12-25
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Farewell message from Yalong Cao
Our colleague Yalong CAO will move to the Morningside Center of Mathematics and the Institute of Mathematics at the Chinese Academy of Science in Beijing as an Associate Professor, starting from Jan. 9, 2024. We all wish him success in his new affiliation! Here is a message from Yalong: I am deeply in debt of gratitude to Hatsuda san and all iTHEMS assistants for their generous support over the two and a half years which I spent in iTHEMS. To mathematicians, maybe the most important thing is to have an environment where we can freely develop things that fascinate us, which might not be useful for something else immediately. It is a great fortune to me that iTHEMS provides such an environment. Besides that, I have been enjoying discussing with our lovely members and also wandering in the beautiful Wako campus (especially during Spring and Autumn), which helps to refresh me all the time. I will move to the Chinese Academy of Sciences in Beijing to work and become a visiting scientist of iTHEMS. I hope to come back to visit regularly and continue to enjoy everything here. Everyone is surely very welcome to visit me in Beijing. Let's keep in touch and keep enjoying our life and career.
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2023-08-27
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3rd Summer School of Mathematical Biology
From the 23rd to the 25th of August 2023, the 3rd Summer School of Mathematical Biology took place at Sokendai University (Hayama, Kanagawa Prefecture). It was a lecture camp organized primarily by our iTHEMS colleagues, Daiki Kumakura and Keiichi Morita. The topics included virus evolution, immune response, coexistence theories in biology and rapid evolution, human migration and its processes, optimization strategies in marine organism reproduction, and modeling biological metabolism. At the summer school, Tetsuo Hatsuda (iTHEMS Director) also participated as an attendee. In the end, there was a fruitful event, including an introduction to iTHEMS. The summer school will be held again next year.
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2023-07-21
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The Discovery Evening was held on June 22 at Wako Campus
The second on-site Discovery Evening since the COVID-19 pandemic was held on June 22 at Wako Campus. 35 people attended the event, which was organized by the Research Personnel Affairs Section, RIKEN. José Said Gutiérrez-Ortega (Special Postdoctoral Researcher, iTHEMS) was one of the two speakers in the event. He gave a presentation titled "Natural history of cycads: Deciphering the Rosetta Stone of plant evolution." He explained that cycads existed from the time of the dinosaurs, but they were able to live on despite the dinosaurs going extinct. For more details, please visit the RIKENETIC website through the related link below. To access RIKENETIC, you will need to use the intranet.
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2023-06-21
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iTHEMS Science Outreach Workshop 2023 was held on June 16-18, 2023
On June 16-18, we had Meeting on Outreach of RIKEN iTHEMS 2023 @Sendai & Zoom. This year the meeting was held at TOKYO ELECTRON House of Creativity 3F, Lecture Theater, Katahira Campus, Tohoku University. It was organized by RIKEN iTHEMS and Mathematical Science Center for Co-creative Society of Tohoku University and co-organised by Tohoku Forum for Creativity, Organization for Research Promotion, Tohoku University and RIKEN CPR, Prediction Science Laboratory. There were 37 people participated at TOKYO ELECTRON House of Creativity and 13 more by zoom. There were 19 talks at the venue and 2 talks by zoom. 4 talks were by members of iTHEMS explaining recent development in various fields in sciences. 8 talks were from universities or institutes on different aspects of research, where 2 were by ex-members of iTHEMS. 8 talks were given by journalists and 1 by MEXT. There was also 1 poster by a journalist, a display of photos of fingers of mathematicians, a display of monthly academic magazine. The participants consist of 9+4 members from RIKEN, 14+2 from universities and institutes, and 14+7 journalists (at venue + by zoom). The venue was so nicely organized and ideal for the meeting of 30 - 40 participants, and the lounge next to the conference room was comfortably clouded which greatly contributed the success of the meeting. We organized social gathering on the two evenings and which were also successful. We thank very much for the help of Profs. Yoshiaki Maeda and Hiroshi Suito for the warm hospitality. By the success of this meeting, we hope the continuation of Journalist in residence program and this workshop next year. Reported by Takashi Tsuboi
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2023-05-22
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Ryosuke Iritani gave a scientific outreach talk at Mathcafe on May 14, 2023
On Sunday 14th May, Ryosuke Iritani gave a scientific outreach talk at Mathcafe. He focused on spatial biodiversity as a chief topic and how to use mathematics to estimate, and make inferences for, the biodiversity. He explained the measurement of biodiversity from the axiomatic viewpoint, that is, he explained what properties should be satisfied by the quantity that is supposed to measure biodiversity. He then moved on to explaining an application of generating functions to biodiversity measures. He finished his talk by saying that mathematics is not only useful to science but also a life-time fun hobby.
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2023-05-17
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Thomas Hitchcock gave a short talk at Nerd Nite Tokyo on April 21, 2023
On Friday 21st April, Thomas Hitchcock gave a short talk at Nerd Nite Tokyo entitled “Sex Education: reproductive diversity across the tree of life”. There he talked to a general audience about the range of ways that organisms may reproduce, from those organisms that simply make copies of their own genes (asexual reproduction), to those that mix them with others (sexual reproduction), and those that can do both (facultative sex). He discussed the different mechanisms that organisms may use to decide whether to reproduce as a female (producing eggs) or male (producing sperm), and how genes may pass differently to offspring through these two routes, illustrating these ideas with stories about spoonworms, fungus gnats, and rotifers. Finally, he stressed how evolution may work differently in these different reproductive systems, and so the importance of understanding this diversity for guiding our efforts in conservation, agriculture, and medicine.
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2023-05-08
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ブラックホールの響きで探る極限重力の物理
Naritaka Oshita (Visiting Scientist, iTHEMS) contributed to the chapter “Researches” in the membership journal of the physical society of Japan on the universality in a black hole ringing and its application to probe the near-horizon physics of black holes. Also, a picture relevant to Naritaka Oshita’s research on a black hole ringing was selected as the cover art of the journal. You can visit the following web site of the Physical Society of Japan to access the contributions.
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2023-05-02
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RIKEN iTHEMS signed a new MoU with Lawrence Berkeley National Laboratory (LBNL)
Reiner Kruecken (Director of the Nuclear Science Division of LBNL) and Tetsuo Hatsuda (Director of RIKEN iTHEMS) are the principal coordinators for LBNL and RIKEN iTHEMS, respectively, for this MoU [1]. The photo was taken in front of the desk of Ernest Lawrence [2], which is preserved at LBNL.
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2023-03-31
ホットトピックMessage from Tetsuo Hatsuda (March 31, 2023)
Dear iTHEMS members Today is the last day of FY2022. I would like to express my deepest gratitude to all of you for your efforts in overcoming the pandemic this year and continuing your research activities. I would also like to thank the following people who physically have left or are leaving iTHEMS for their great contributions to iTHEMS during FY2022. Bon Voyage! Etsuko Itou, Masaki Taniguchi, Naritaka Oshita, Takuya Sugiura, Yuki Yazaki, Matthias Berwein, Akira Matsumoto, Chris Bourne, Michiya Mori, Shou Yoshikawa, Don Warren, Shunsuke Kobayashi, Hiroshi Yokota, Gilberto Nakamura, Kazumi Kuwata. With best regards, Tetsuo Hatsuda
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2023-03-28
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Farewell message from Dr. Euki YAZAKI
Our colleague Euki YAZAKI will move to the Research Center for Advanced Analysis, National Agriculture and Food Research Organization as a Research Scientist from April 1st. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Euki YAZAKI: As I prepare to leave after three wonderful years at RIKEN, I would like to take this opportunity to express my gratitude to all of you. It has been an honor to work with such a wonderful group of theoretical and mathematical scientists and I have learned so much from each and every one of you. I would like to thank all my colleagues who have supported me during my time at iTHEMS. Your expertise and enthusiasm have been invaluable, and I am grateful for the time I have spent with you. I would also like to thank the staff at iTHEMS support for their many supports. Although I will be moving on to new adventures, I hope to continue to enjoy good research with iTHEMS members in the future.
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2023-03-23
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Farewell message from Dr. Akira Matsumoto
Our colleague Akira Matsumoto will move to the Yukawa Institute for Theoretical Physics, Kyoto University as a Program-Specific Researcher from April 1st. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Akira Matsumoto: I have been a member of iTHEMS for almost one year, which is the first opportunity for me to work as a postdoc. In spite of the difficult situation of COVID-19, I was able to enjoy research activity thanks to a good environment of iTHEMS and great effort by assistants. It is interesting to join seminars and discussions freely with researchers from various fields. I would like to thank all the iTHEMS members for giving me nice experiences. I plan to be a visiting scientist of iTHEMS after leaving RIKEN. I am very happy to keep in contact with iTHEMS members and looking forward to collaboration in the future.
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2023-03-16
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Farewell message from Dr. Hiroshi Yokota
Our colleague Hiroshi Yokota has moved to the Graduate School of Human and Environmental Studies, Kyoto University as a CREST postdoctoral researcher from March 1, 2023. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Hiroshi Yokota: I had worked at iTHEMS as a postdoctoral researcher for almost 4 years. I would like to thank all the iTHEMS members for the valuable discussions on their researches including my own research. Moreover, in iTHEMS, I had very good opportunities to attend the exciting seminars and colloquiums which gave me brilliant ideas from the various fields: physics, biology, mathematics and information. I enjoyed the discussions, the seminars and the colloquiums in iTHEMS. I also would like to thank all assistants who gave us the comfortable research environment. Fortunately, I am allowed to be the visiting scientist in iTHEMS. I hope to discuss with iTHEMS members in future also.
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2023-03-15
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Farewell message from Dr. Naritaka Oshita
Our colleague Naritaka Oshita will move to the Kyoto University as a Hakubi assistant professor from April 1st. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Naritaka Oshita: I enjoyed studying gravity and black holes while being a part of iTHEMS and participating in some iTHEMS events and activities. As of the end of this March, it has been almost two years since I started my second postdoc at iTHEMS as an SPDR fellow in 2021 April. From 2023 April, I will be a Hakubi assistant professor at Kyoto University and will start my exciting new research to understand the mystery of gravity. I enjoyed discussing with many iTHEMS members who are working on physics, biology, mathematics, (quantum) information theory, etc. I thank all faculties, researchers, and students at iTHEMS for having exciting discussions with me! iTHEMS assistants have been contributing to this group to improve the research environment at iTHEMS and they kindly helped me a lot when I needed their help and was in trouble. I appreciate all the assistants at iTHEMS for their support and for having fun conversations! Again, thank you to all members at iTHEMS for everything! I will still be a part of iTHEMS as a visiting researcher. I hope I can have exciting discussions and conversations with you in the future. See you again!
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2023-03-13
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Farewell message from Dr. Masaki Taniguchi
Our colleague Masaki Taniguchi will move to the Kyoto University as an assistant professor from April 1st. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Masaki Taniguchi: I'd like to thank the program director and assistants for many helpful supports over these three years and also many research members for discussing with me. I spent three years in iTHEMS as a mathematical researcher(SPDR). During the three years, I could concentrate on doing my research and communicating with researchers in other fields. In particular, I had been attending a weekly seminar focusing on interactions between math and physics. It was a valuable experience to feel various viewpoints from physics. Also, I got a chance to give a presentation at an event of RIKEN for high school or junior high school students. In my final year, I was chosen as a research member of a program at MSRI and spent four months at Berkeley to communicate with many researchers in my field. I could also invite several researchers to the math seminar and had good opportunities to promote research. I appreciate a good environment in iTHEMS so that I could have these experiences. From this April, I’ll be an assistant professor at Kyoto University. But, I still have several collaborators in iTHEMS, so I’d like to continue discussing with many researchers in iTHEMS as a visiting researcher.
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2023-03-13
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Farewell message from Dr. Etsuko Itou
Our colleague Etsuko Itou will move to the Yukawa Institute for Theoretical Physics, Kyoto University as an associate professor from April 1st. We all will miss her and wish her the best of luck in her latest endeavor. Here is a message from Etsuko Itou : I worked at iTHEMS for almost a year as a senior research scientist. I had the opportunity to discuss researches with people from various backgrounds, go on a short trip to Kawagoe, and give presentations at interdisciplinary research meetings, which was a valuable experience for me. I would also like to thank my assistants and PR staff for their support! I will be a visiting scientist of iTHEMS next year. I look forward to working with you again.
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2023-03-13
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Interdisciplinary Science Conference in Okinawa (ISCO 2023) on February 27, 2023
On Feb.27 (Mon)-March 3 (Fri), ISCO 2023 (Interdisciplinary Science Conference in Okinawa 2023 - Physics and Mathematics meet Medical Science -) was held at OIST (Okinawa Institute of Science and Technology). The conference was co-hosted by RIKEN iTHEMS, Kavli IPMU and OIST, with 135 participants inside and outside Japan. This was the first in-person conference held in OIST after the Covid-19 pandemic. There were 28 invited talks and 9 contributed talks. From RIKEN iTHEMS, Gordon Baym, Catherine Beauchemin, Gen Kurosawa, Hiro Nagataki, Hidetoshi Nishimori, Tomoki Ozawa, and Takashi Tsuboi gave scientific talks, and Tetsuo Hatsuda gave a closing remark. The purpose of ISCO 2023 was to bring together leading researchers in the fields of physics, astrophysics, mathematics, data science, life science, environmental science, and medical science, and to discuss the latest advancements in their respective fields. In addition to the presentations held at the OIST auditorium, a tour inside the OIST campus as well as a special lecture about Sharks by Dr. K. Sato at Churaumi Aquarium were held. Participants have intensive discussions beyond the disciplines at the plenary, poster, and lunch sessions. Some of the presentation slides can be downloaded from the ISCO 2023 webpage.
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2023-03-13
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理化学研究所-奈良女子大学理学部合同 ダイバーシティ推進ワークショップが3月7日に開催されました
3月7日と3月8日の2日間、奈良女子大学理学部の2回生、3回生、4回生（合計16名）が理研の川上研究室、侯研究室、iTHEMS, RIBF施設、宮脇研究室を訪問しました。それぞれの研究室で、最先端研究の一端に触れるとともに、初日夕方からの理研研究者との交流会では、より深く研究内容について質問したり、研究者の日常を知る機会も設けられました。また、数学、物理学、生物学、環境化学など奈良女子大学理学部の異なるコースの学生たちが、学年を越えて交流する機会にもなりました。 このダイバーシティ推進活動は、奈良女子大学理学部と理研iTHEMSが共同で推進するリケジョ育成事業の一環として、奈良女子大学での連続講義とセットで行われているもので、次年度以降も継続する予定です。
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2023-01-25
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Farewell message from Dr. Shou Yoshikawa
Our colleague Shou Yoshikawa will move to the Tokyo Institute of Technology as an assistant professor from February 1st. We all will miss him and wish him the best of luck in his latest endeavor. Here is a message from Shou Yoshikawa: I spent almost a year at iTHEMS as an SPDR. I have had several opportunities to speak about my research at iTHEMS events and they have all been wonderful experiences. People from various fields actively asked me questions, which was a valuable experience. I would like to thank all the iTHEMS researchers and the iTHEMS desk staff for giving me a good environment in which I could concentrate on my research, even if it was only for a short time. I can fortunately continue to be a member of iTHEMS as a visiting scientist. I hope to get closer to more iTHEMS members in the future.
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2022-12-27
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Ryosuke Iritani wrote an essay for The Big Issue Japan 445
Ryosuke Iritani (Research Scientist, iTHEMS) wrote an essay for The Big Issue Japan, and the latest volume (vol 445) is just published on 15th December. The Big Issue is a magazine dedicated to supporting people in difficult circumstances and helping them achieve self-reliance. Each issue costs 450 yen, out of which 230 yen is the direct income of the street sales staff. Ryosuke's comment: The essay is about my “third place,” a place separated from home and workplace for me. I hope as many people as possible take it a read and support the people!
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2022-12-05
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Four Perspectives on Neutron Stars, Pulsars, and Magnetars
The recent work [1] on X-ray bursts from the neutron stars led by our colleague, Akira Dohi (Visiting Scientist, iTHEMS), was featured in the article "Four Perspectives on Neutron Stars, Pulsars, and Magnetars" appeared in Research highlights from the Journals of the American Astronomical Society (see related link below).
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