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Nakamura, Keita*; Suzuki, Kenta; Kaneko, Eiichiro*; Abe, Yoshitaka*; Shimizu, Masaru*; Ogane, Katsuji*
Journal of Robotics and Mechatronics, 38(1), p.192 - 201, 2026/02
Yamada, Taichi; Suzuki, Soichiro; Ito, Rintaro; Ota, Yua*; Kaneko, Eiichiro*; Ogane, Katsuji*; Kawabata, Kuniaki
Advanced Robotics, 12 Pages, 2025/10
Times Cited Count：0 Percentile：0.00(Robotics)We develop a test method to evaluate the vertical moving performance of an unmanned aircraft system (UAS) in a narrow environment, specifically performance for ascending through a narrow aperture. This research aims to boost the UAS industry by pushing for the expansion of UAS use into various places and situations. UAS users should know whether the UAS performance is enough to achieve their objectives and what UAS suits them. However, discussing what/how much UASs can do is complex, especially in a place or situation affecting some UAS functions. Thus, the test method provides an easy-to-understand evaluation of UAS performance for mobility to access a destination in a narrow environment, even for UAS users without technical knowledge. To develop an acceptable test method for the UAS industry, we repeatedly held demonstrations and discussions with UAS manufacturers and users to incorporate their opinions from the early stages of this research. In addition, the experiments show that the test method appropriately indicates the difference in UAS performance. This paper describes the approach of UAS performance evaluation to promote the UAS industry, the development along with UAS users' opinions, and the result of the experiments to compare the type of UAS and consideration.
Ga
O
(x =0, 0.018)Nakajima, Taro*; Mitsuda, Setsuo*; Takahashi, Keiichiro*; Yoshitomi, Keisuke*; Masuda, Kazuya*; Kaneko, Chikafumi*; Homma, Yuki*; Kobayashi, Satoru*; Kitazawa, Hideaki*; Kosaka, Masashi*; et al.
Journal of the Physical Society of Japan, 81(9), p.094710_1 - 094710_8, 2012/09
GaO (
= 0, 0.018)Nakajima, Taro*; Mitsuda, Setsuo*; Takahashi, Keiichiro*; Yoshitomi, Keisuke*; Masuda, Kazuya*; Kaneko, Chikafumi*; Homma, Yuki*; Kobayashi, Satoru*; Kitazawa, Hideaki*; Kosaka, Masashi*; et al.
Journal of the Physical Society of Japan, 81(9), p.094710_1 - 094710_8, 2012/09
Times Cited Count：17 Percentile：65.41(Physics, Multidisciplinary)Ishikawa, Masumi*; Kaneko, Satoru*; Kitayama, Kazumi*; Ishiguro, Katsuhiko*; Ueda, Hiroyoshi*; Wakasugi, Keiichiro*; Shinohara, Nobuo; Okumura, Keisuke; Chino, Masamichi; Moriya Noriyasu*
Nihon Genshiryoku Gakkai Wabun Rombunshi, 8(4), p.304 - 312, 2009/12
Since quality control issues for vitrified waste are defined mainly with the focus on the transport and storage of the waste rather than the long-term safety of geological disposal, they do not cover inventories of long-lived nuclides which are of most interest in the safety assessment of geological disposal. Therefore we suggest a flow chart for assessment of inventories of long-lived nuclides in the vitrified waste focusing on measured value. We started a programme to examine the applicability as well as to improve reliability of nuclide generation/decay code and nuclear data library using liquid waste from spent fuel with clear irradiation history. To solve the issue of quality control for vitrified waste, comprehensive study is needed in aspects not only of geological disposal field but also of operation of nuclear power plant, reprocessing of spent fuel and vitrification of liquid waste. This study is a pioneering study to integrate them.
Okumura, Keisuke; Kugo, Teruhiko; Kaneko, Kunio*; Tsuchihashi, Keiichiro*
JAEA-Data/Code 2007-004, 313 Pages, 2007/02
JAEA-Data-Code-2007-004.pdf:13.5MB
The SRAC is a code system applicable to neutronics analysis of a variety of reactor types. Since the publication of the second version of the users manual (JAERI-1302) in 1986 for the SRAC system, a number of additions and modifications to the functions and the library data have been made to establish a comprehensive neutronics code system. The current system includes major neutron data libraries (JENDL-3.3, JENDL-3.2, ENDF/B-VII, ENDF/B-VI.8, JEFF-3.1, JEF-2.2, etc.), and integrates five elementary codes for neutron transport and diffusion calculation; PIJ based on the collision probability method applicable to 16 kind of lattice models, SN transport codes ANISN(1D) and TWOTRAN(2D), diffusion codes TUD(1D) and CITATION(multi-D). The system also includes an auxiliary code COREBN for multi-dimensional core burn-up calculation.
Yamada, Taichi; Ito, Rintaro; Ota, Yua*; Kaneko, Eiichiro*; Ogane, Katsuji*; Kawabata, Kuniaki
no journal, ,
This paper introduces an approach for quantitatively evaluating how difficult the environment is for multicopter flight. The quantitative evaluation of multicopter flight difficulty promotes the expansion of multicopter use into various situations, as it enables multicopter users to understand the risks associated with multicopter use in the target environment and to take measures for safe operation. This research focuses on wind reflections from structures surrounding a multicopter in a narrow space. This research proposes a method for assessing the change in airflow around the multicopter due to wind reflection. This paper also describes an experiment to evaluate airflow changes simulating multicopter flight in a corner of the ceiling.
Mitsui, Seiichiro; Yoshikawa, Hideki; Matsui, Toshiya*; Kaneko, Makoto*; Nakamatsu, Yuki*; Utsunomiya, Satoshi*
no journal, ,
Engineered barrier system for geological disposal of high level nuclear waste in Japan consists of vitrified waste, metal overpack and clay buffer material. Although the overpack and the buffer material are designed to prevent the release of radionuclides from the vitrified waste, some experimental studies have shown that these components can promote glass dissolution. To gain insight in the long-term behavior of the vitrified waste at the glass-iron interface in the geological repository conditions, we studied sand contacted with iron cannon retrieved from Kaiyo Maru, a warship of the Tokugawa Shogunate that sank off the coast of Esashi in Hokkaido, 1868, as an archaeological analog. In this paper, we discuss type of corrosion and alteration products characterized by microanalyses, such as transmission electron microscope, and clogging of sand voids analyzed by a micro-focus X-ray computed tomography.
Yamada, Taichi; Suzuki, Soichiro; Ito, Rintaro; Ota, Yua*; Kaneko, Eiichiro*; Ogane, Katsuji*; Kawabata, Kuniaki
no journal, ,
We develop evaluation methods for unmanned aircraft systems (UAS) in a narrow environment to boost industry. It is not easy to discuss what/much UAS users can do by using the UAS; furthermore, environmental influence makes it more complex. The evaluation method in this research aims to indicate UAS performances in an easy-to-understand form for UAS users and to push UAS use. The method evaluates a task's moving performance because moving is a critical function of UAS and is commonly required in many missions. Specifically, this paper introduces the evaluation method for ascending through a narrow aperture. In addition, this paper introduces an experiment to compare UAS performance by the aperture size.
MnO
Kimura, Hiroyuki*; Wakimoto, Shuichi; Kamada, Yoichi*; Noda, Yukio*; Kakurai, Kazuhisa; Kaneko, Koji; Metoki, Naoto; Kon, Keiichiro*
no journal, ,
MnO(
rare earth, Bi, Y) systen achieves a multi-ferroic state where magnetic and ferroelectric orders coexist. We have performed neutron diffraction under magnetic field to study the correlation between field-induced magnetism and ferroelectricity. T-H phase diagram of the magnetic and electric states for two samples, HoMn
O
and ErMnO, shows perfect agreement between the commensurate-incommensurate magnetic phase boundary and the ferroelectric transition, evincing that the commensurate magnetic state is essential for the ferroelectric state in this system.
