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Your search keyword '"Tamura, Kazuhiro"' showing total 727 results
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727 results on '"Tamura, Kazuhiro"'

1. Robotic Backchanneling in Online Conversation Facilitation: A Cross-Generational Study

Author

Kobuki, Sota, Seaborn, Katie, Tokunaga, Seiki, Fukumori, Kosuke, Hidaka, Shun, Tamura, Kazuhiro, Inoue, Koji, Kawahara, Tatsuya, and Otake-Mastuura, Mihoko

Subjects
Computer Science - Robotics, Computer Science - Computation and Language, Computer Science - Human-Computer Interaction
Abstract

Japan faces many challenges related to its aging society, including increasing rates of cognitive decline in the population and a shortage of caregivers. Efforts have begun to explore solutions using artificial intelligence (AI), especially socially embodied intelligent agents and robots that can communicate with people. Yet, there has been little research on the compatibility of these agents with older adults in various everyday situations. To this end, we conducted a user study to evaluate a robot that functions as a facilitator for a group conversation protocol designed to prevent cognitive decline. We modified the robot to use backchannelling, a natural human way of speaking, to increase receptiveness of the robot and enjoyment of the group conversation experience. We conducted a cross-generational study with young adults and older adults. Qualitative analyses indicated that younger adults perceived the backchannelling version of the robot as kinder, more trustworthy, and more acceptable than the non-backchannelling robot. Finally, we found that the robot's backchannelling elicited nonverbal backchanneling in older participants., Comment: Published at Proceedings of the 2023 32nd IEEE International Conference on Robot and Human Interactive Communication (RO-MAN 2023)

Published
2024
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2. Commissioning of a compact multibend achromat lattice: A new 3 GeV synchrotron radiation facility

Author

Obara, Shuhei, Ueshima, Kota, Asaka, Takao, Hosaka, Yuji, Kan, Koichi, Nishimori, Nobuyuki, Aoki, Toshitaka, Asano, Hiroyuki, Haga, Koichi, Iba, Yuto, Ihara, Akira, Ito, Katsumasa, Iwashita, Taiki, Kadowaki, Masaya, Kanahama, Rento, Kobayashi, Hajime, Kobayashi, Hideki, Nishihara, Hideo, Nishikawa, Masaaki, Oikawa, Haruhiko, Saida, Ryota, Sakuraba, Keisuke, Sugimoto, Kento, Suzuki, Masahiro, Takahashi, Kouki, Takahashi, Shunya, Tanaka, Tatsuki, Tsuchiyama, Tsubasa, Yoshioka, Risa, Aoki, Tsuyoshi, Dewa, Hideki, Fujita, Takahiro, Kawase, Morihiro, Kiyomich, Akio, Hamano, Takashi, Masaki, Mitsuhiro, Masuda, Takemasa, Matsubara, Shinichi, Okada, Kensuke, Saji, Choji, Taniuchi, Tsutomu, Taniuchi, Yukiko, Ueda, Yosuke, Yamaguchi, Hiroshi, Yanagida, Kenichi, Fukami, Kenji, Hosoda, Naoyasu, Ishii, Miho, Itoga, Toshiro, Iwai, Eito, Magome, Tamotsu, Oishi, Masaya, Ohshima, Takashi, Kondo, Chikara, Sakurai, Tatsuyuki, Shoji, Masazumi, Sugimoto, Takashi, Takano, Shiro, Tamura, Kazuhiro, Watanabe, Takahiro, Tomai, Takato, Azumi, Noriyoshi, Inagaki, Takahiro, Maesaka, Hirokazu, Takahashi, Sunao, Tanaka, Takashi, Inoue, Shinobu, Kumazawa, Hirosuke, Moriya, Kazuki, Sakai, Kohei, Seno, Toshio, Sumitomo, Hiroshi, Takesako, Ryoichi, Tanaka, Shinichiro, Yamamoto, Ryo, Yokomachi, Kazutoshi, Yoshioka, Masamichi, Hara, Toru, Matsui, Sakuo, Hiraiwa, Toshihiko, Tanaka, Hitoshi, and Ego, Hiroyasu

Subjects
Physics - Accelerator Physics, High Energy Physics - Experiment
Abstract

NanoTerasu, a new 3 GeV synchrotron light source in Japan, began user operation in April 2024. It provides high-brilliance soft to tender X-rays and covers a wide spectral range from ultraviolet to tender X-rays. Its compact storage ring with a circumference of 349 m is based on a four-bend achromat lattice to provide two straight sections in each cell for insertion devices with a natural horizontal emittance of 1.14 nm rad, which is small enough for soft X-rays users. The NanoTerasu accelerator incorporates several innovative technologies, including a full-energy injector C-band linear accelerator with a length of 110 m, an in-vacuum off-axis injection system, a four-bend achromat with B-Q combined bending magnets, and a TM020 mode accelerating cavity with built-in higher-order-mode dampers in the storage ring. This paper presents the accelerator machine commissioning over a half-year period and our model-consistent ring optics correction. The first user operation with a stored beam current of 160 mA is also reported. We summarize the storage ring parameters obtained from the commissioning. This is helpful for estimating the effective optical properties of synchrotron radiation at NanoTerasu., Comment: 30 pages, 24 figures, submitted to the journal

Published
2024

5. Analysis of shape change of droplet in dipolar Bose-Hubbard model

Author

Tamura, Kazuhiro, Watabe, Shohei, and Nikuni, Tetsuro

Subjects
Condensed Matter - Quantum Gases
Abstract

The long-range and anisotropic nature of the dipolar interaction provides the so-called supersolid phases in Bose-Einstein condensates (BECs) in an optical lattice. However, in a certain area of dipole interaction parameters, BECs can form into a droplet. In this paper, in order to qualitatively understand the droplet formations, we propose a toy model that allows us to estimate the size and shape of droplets in dipolar Bose-Hubbard system in the optical lattice. We compare results of the toy model with numerical solutions of the mean-field calculation., Comment: 7 pages, 3 figures

Published
2021
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8. Annotation System for Dialogue Datasets of Older Adult’s with Photos and Storytelling

Author

Tokunaga, Seiki, Takata, Shogo, Tamura, Kazuhiro, Otake-Matsuura, Mihoko, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Pardede, Eric, editor, Delir Haghighi, Pari, editor, Khalil, Ismail, editor, and Kotsis, Gabriele, editor

Published
2022
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13. Performance Evaluation of Text-Oriented Artificial Chat Operation System (TACOS)

Author

Tokunaga, Seiki, Tamura, Kazuhiro, Otake-Matsuura, Mihoko, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, and Duffy, Vincent G., editor

Published
2020
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18. Lipid Peroxidation Regulators GPX4 and FSP1 as Prognostic Markers and Therapeutic Targets in Advanced Gastric Cancer.

Author

Tamura, Kazuhiro, Tomita, Yoshinobu, Kanazawa, Takumi, Shinohara, Hajime, Sakano, Masayoshi, Ishibashi, Sachiko, Ikeda, Masumi, Kinoshita, Mayumi, Minami, Junko, Yamamoto, Kurara, Kato, Yuki, Furukawa, Asuka, Haruki, Shigeo, Tokunaga, Masanori, Kinugasa, Yusuke, Kurata, Morito, Kitagawa, Masanobu, Ohashi, Kenichi, and Yamamoto, Kouhei

Subjects
*STOMACH cancer, *GLUTATHIONE peroxidase, *CELL death, *PROGNOSIS, *CANCER patients
Abstract

Gastric cancer is one of the most common cancers worldwide, and new therapeutic strategies are urgently needed. Ferroptosis is an intracellular iron-dependent cell death induced by the accumulation of lipid peroxidation, a mechanism different from conventional apoptosis and necrosis. Therefore, induction of ferroptosis is expected to be a new therapeutic strategy. Glutathione peroxidase 4 (GPX4) and ferroptosis suppressor protein 1 (FSP1) have been identified as the major inhibitors of ferroptosis. Herein, we performed immunohistochemistry for GPX4, FSP1, and 4-HNE using tissues from patients with gastric cancer and investigated the relationship between these factors and prognosis. Patients with high GPX4 expression or high GPX4 expression and low 4-HNE accumulation tended to have a poor prognosis (p = 0.036, 0.023), whereas those with low FSP1 expression and high 4-HNE accumulation had a good prognosis (p = 0.033). The synergistic induction of cell death by inhibiting GPX4 and FSP1 in vitro was also observed, indicating that the cell death was non-apoptotic. Our results indicate that the expression and accumulation of lipid peroxidation-related factors play an important role in the clinicopathological significance of gastric cancer and that novel therapeutic strategies targeting GPX4 and FSP1 may be effective in treating patients with gastric cancer who have poor prognosis. [ABSTRACT FROM AUTHOR]

Published
2024
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19. Cognitive Training for Older Adults with a Dialogue-Based, Robot-Facilitated Storytelling System

Author

Tokunaga, Seiki, Seaborn, Katie, Tamura, Kazuhiro, Otake-Matsuura, Mihoko, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Woeginger, Gerhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Cardona-Rivera, Rogelio E., editor, Sullivan, Anne, editor, and Young, R. Michael, editor

Published
2019
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24. Solubility prediction of CI Disperse Red 4 and CI Disperse Red 15 in supercritical carbon dioxide based on the back propagation neural network.

Author

Yan, Jun, Du, Shuang, Hu, Jinhua, Tamura, Kazuhiro, and Li, Hong

Subjects
SUPERCRITICAL carbon dioxide, BACK propagation, SOLUBILITY, NONLINEAR functions
Abstract

The solubility of 1‐amino‐2‐hydroxy‐4‐methoxy‐anthraquinone (CI Disperse Red 4) and 1‐amino‐2‐hydroxy‐anthraquinone (CI Disperse Red 15) in supercritical carbon dioxide was measured using a dynamic method over a temperature range from 343.15 to 373.15 K and a pressure range from 14 to 22 MPa. The experimental data are analysed by using the back propagation neural network constructed by MATLAB. In the back propagation neural network, the input layer consisted of two inputs, which are temperature and pressure, the output layer consisted of the solubility of dyes, and the hidden layer function was composed of a non‐linear function. The results of the analysis showed that a good fitting level of 0.99 was obtained, which means that the back propagation neural network can accurately estimate the solubility data in supercritical carbon dioxide. [ABSTRACT FROM AUTHOR]

Published
2024
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