Zobrazeno 1 - 10
of 475
pro vyhledávání: '"TAKAHASHI, HIROTAKA"'
Autor:
Sasaoka, Seiya, Sakai, Yusuke, Dominguez, Diego, Somiya, Kentaro, Sakai, Kazuki, Oohara, Ken-ichi, Meyer-Conde, Marco, Takahashi, Hirotaka
Publikováno v:
PhysRevD.110.104020,2024
Core-collapse supernovae (CCSNe) are potential multimessenger events detectable by current and future gravitational wave (GW) detectors. The GW signals emitted during these events are expected to provide insights into the explosion mechanism and the
Externí odkaz:
http://arxiv.org/abs/2411.08407
Autor:
Sasaoka, Seiya, Koyama, Naoki, Dominguez, Diego, Sakai, Yusuke, Somiya, Kentaro, Omae, Yuto, Takahashi, Hirotaka
Publikováno v:
Phys. Rev. D 109, 043011 (2024)
Recent advancements in gravitational wave astronomy have seen the application of convolutional neural networks (CNNs) in signal detection from compact binary coalescences. This study presents a comparative analysis of two CNN architectures: one-dimen
Externí odkaz:
http://arxiv.org/abs/2312.04855
Autor:
Sasaoka, Seiya, Koyama, Naoki, Dominguez, Diego, Sakai, Yusuke, Somiya, Kentaro, Omae, Yuto, Takahashi, Hirotaka
Publikováno v:
Phys. Rev. D 108, 123033 (2023)
In this study, we employ a convolutional neural network to classify gravitational waves originating from core-collapse supernovae. Training is conducted using spectrograms derived from three-dimensional numerical simulations of waveforms, which are i
Externí odkaz:
http://arxiv.org/abs/2310.09551
Recently, many convolutional neural networks (CNNs) for classification by time domain data of multisignals have been developed. Although some signals are important for correct classification, others are not. When data that do not include important si
Externí odkaz:
http://arxiv.org/abs/2302.12711
Autor:
Sakai, Yusuke, Itoh, Yousuke, Jung, Piljong, Kokeyama, Keiko, Kozakai, Chihiro, Nakahira, Katsuko T., Oshino, Shoichi, Shikano, Yutaka, Takahashi, Hirotaka, Uchiyama, Takashi, Ueshima, Gen, Washimi, Tatsuki, Yamamoto, Takahiro, Yokozawa, Takaaki
Publikováno v:
Annalen der Physik, issue 2200140 (2022)
Transient noise appearing in the data from gravitational-wave detectors frequently causes problems, such as instability of the detectors and overlapping or mimicking gravitational-wave signals. Because transient noise is considered to be associated w
Externí odkaz:
http://arxiv.org/abs/2208.03623
An observation of gravitational waves is a trigger of the multi-messenger search of an astronomical event. A combination of the data from two or three gravitational wave telescopes indicates the location of a source and low-latency data analysis is k
Externí odkaz:
http://arxiv.org/abs/2202.12784
Publikováno v:
IEEE Access, 2022
The effectiveness of the first and second dose vaccinations are different for COVID-19; therefore, a susceptible-infected-recovered-vaccination1-vaccination2-death (SIRVVD) model that can represent the states of the first and second vaccination doses
Externí odkaz:
http://arxiv.org/abs/2202.07468
Autor:
Sakai, Yusuke, Itoh, Yousuke, Jung, Piljong, Kokeyama, Keiko, Kozakai, Chihiro, Nakahira, Katsuko T., Oshino, Shoichi, Shikano, Yutaka, Takahashi, Hirotaka, Uchiyama, Takashi, Ueshima, Gen, Washimi, Tatsuki, Yamamoto, Takahiro, Yokozawa, Takaaki
Publikováno v:
Scientific Reports, 12, Article number: 9935 (2022)
In the data obtained by laser interferometric gravitational wave detectors, transient noise with non-stationary and non-Gaussian features occurs at a high rate. This often results in problems such as detector instability and the hiding and/or imitati
Externí odkaz:
http://arxiv.org/abs/2111.10053
Autor:
Arimoto, Makoto, Asada, Hideki, Cherry, Michael L., Fujii, Michiko S., Fukazawa, Yasushi, Harada, Akira, Hayama, Kazuhiro, Hosokawa, Takashi, Ioka, Kunihito, Itoh, Yoichi, Kanda, Nobuyuki, Kawabata, Koji S., Kawaguchi, Kyohei, Kawai, Nobuyuki, Kobayashi, Tsutomu, Kohri, Kazunori, Koshio, Yusuke, Kotake, Kei, Kumamoto, Jun, Machida, Masahiro N., Matsufuru, Hideo, Mihara, Tatehiro, Mori, Masaki, Morokuma, Tomoki, Mukohyama, Shinji, Nakano, Hiroyuki, Narikawa, Tatsuya, Negoro, Hitoshi, Nishizawa, Atsushi, Ohgami, Takayuki, Omukai, Kazuyuki, Sakamoto, Takanori, Sako, Shigeyuki, Sasada, Mahito, Sekiguchi, Yuichiro, Serino, Motoko, Soda, Jiro, Sugita, Satoshi, Sumiyoshi, Kohsuke, Susa, Hajime, Suyama, Teruaki, Takahashi, Hirotaka, Takahashi, Kazuya, Takiwaki, Tomoya, Tanaka, Takahiro, Tanaka, Masaomi, Tanikawa, Ataru, Tominaga, Nozomu, Uchikata, Nami, Utsumi, Yousuke, Vagins, Mark R., Yamada, Kei, Yoshida, Michitoshi
The detections of gravitational waves (GW) by LIGO/Virgo collaborations provide various possibilities to physics and astronomy. We are quite sure that GW observations will develop a lot both in precision and in number owing to the continuous works fo
Externí odkaz:
http://arxiv.org/abs/2104.02445
Publikováno v:
Mathematical Biosciences and Engineering, 2021, Volume 18, Issue 5, pp.6506-6526
As of 2020, COVID-19 is spreading in the world. In Japan, the Ministry of Health, Labor and Welfare developed COVID-19 Contact-Confirming Application (COCOA). The researches to examine the effect of COCOA are still not sufficient. We develop a mathem
Externí odkaz:
http://arxiv.org/abs/2010.12067