Dear colleagues,

On April 1st, we have opened the following website of the abstract submission for
``The 87th Fujiwara seminar: The 50th Anniversary Workshop of the Disk
Instability Model in Compact Binary Stars'' in FY2025 at Tomakomai, Japan.
The deadline is April 30th.
https://web-register.jp/dim50th/en/login/

Please see the following webpage for the detail of this workshop.
https://sites.google.com/view/dim-50th-anniversary

The schedule is below.
April 1st: Abstract submission opens (Please choose oral or poster presentation),
              Application for assistance of travel expenses
April 30th (JST): Deadline of registration
June 1st (JST): Registration and hotel reservation begin
June 30th (JST): Deadline of registration and hotel reservation

* As a rule, the accommodation will be Grand Hotel New Oji, the venue of
the conference.
Hotel reservations can be made at the same time as registration (i.e., June).
Participation fee and accommodation fee will be paid at the registration site.

* Due to the limited number of oral presentations, a selection of oral
presentations will be made by SOC.
For this reason, the registration is in two steps.
If you submit an abstract, your participation will be tentatively registered.
The program of oral presentations and the website for registration will be
available in early June.
Those who get travel expenses from us will be contacted.
If you wish to participate, please make full registration after this June.

* For those who attend only, please make registration after this June.

We look forward to your participation.

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                                    Details of this workshop
============================================================
・Date
2025/9/22 (Mon.) -- 2025/9/26 (Fri.)（on 22nd, welcome reception only）

・Place
Grand Hotel New Oji at Tomakomai, Hokkaido, Japan (in person only)
* The workshop is a discussion-oriented meeting, so we assume that
all participants will be accommodated in the venue hotel Grand Hotel
New Oji.

・Aims of this event
In the 50 years since the disk instability model for outbursts in cataclysmic
variables was proposed in 1974, this model has been developed into
a natural extension of the ``standard disk model'', which is steady and
has a simplified vertical disk structure, and has had tremendous success
in reproducing the time variability of observations.
A unified model explaining outbursts in cataclysmic variables and
X-ray binaries has been established, which led to significant progress
in understanding accretion disks in other systems, such as active
galactic nuclei.
However, recent developments in astronomical observations have led to
the discovery of a number of phenomena that cannot be explained
by the existing models. There is a need to improve the unified model.
In this workshop, we will review historical works, share basic physics and
the latest research works with participants, identify unsolved problems
in this research field and discuss about future works.
This workshop will also stimulate communication between researchers
in cataclysmic variables and X-ray binaries, with the aim of understanding
the accretion physics over the entire disk.

・This workshop is selected as Fujihara seminar and hosted by
Fujihara Foundation.
Please see the following URL for the detail of Fujihara seminar.
https://www.fujizai.or.jp/e-index.html

・Invited speakers
Shigenobu Hirose（Japan Agency for Marine-Earth Science and Technology, Japan）
Yan-Fei Jiang（Center for Computational Astrophysics, USA）
Christian Knigge（Southampton University, UK）
Hirofumi Noda（Tohoku University, Japan）
Ken Ohsuga（University of Tsukuba, Japan）
Gavin Ramsay（Armagh Observatory and Planetarium, UK）
Pablo Reig（Foundation for Research and Technology-Hellas, Greece）
Simone Scaringi（Durham University, UK）
Megumi Shidatsu（Ehime University, Japan）
Warren Skidmore（TMT international Observatory, USA）
Yusuke Tampo（South African Astronomical Observatory, South Africa）
Bailey Tetarenko（McGill University, Canada）
Dennis Wehner（University of Duisburg-Essen, Germany）

・Organizing committee
< Scientific Organizing Committee >
  Mariko Kimura (Kanazawa University, Japan) - Chair
  Yoji Osaki (University of Tokyo, Japan)
  Shin Mineshige (Kyoto University, Japan)
  Chris Done (Durham University, UK)
  Jean-Marie Hameury (University of Strasbourg, France)
  Guillaume Dubus (University of Grenoble Alpes, France)
  Bożena Czerny (Center for Theoretical Physics, Polish Academy of Sciences, Poland)
  Stephen H. Lubow (Space Telescope Science Institute, USA)
  Rebecca G. Martin (University of Nevada, USA)

< Local Organizers >
  Makoto Uemura (Hiroshima University, Japan) - Chair
  Atsuo Okazaki (Hokkai-Gakuen University, Japan)
  Toshihiro Kawaguchi (University of Toyama, Japan)
  Daisaku Nogami (Kyoto University, Japan)

・Contact address
dim50th_ws_helpdesk@googlegroups.com

The number of participants is 100 at maximum. If the number of applicants
exceeds 100, the SOC members will perform the selection.
We will prepare financial support for early-career researchers & students,
though the budget is limited.
If you get the support, the hotel charge and registration fee will be waived.