著者

佐々木 駿 三次 伯知 佐俣 秀一 附田 正則 大村 一郎

出版者

公益社団法人 応用物理学会

雑誌

応用物理学会学術講演会講演予稿集 第68回応用物理学会春季学術講演会 (ISSN:24367613)

巻号頁・発行日

pp.2704, 2021-02-26 (Released:2022-06-19)

著者

佐々木 宏幸 山田 理紗 佐々木 駿

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.85, no.778, pp.2629-2639, 2020 (Released:2020-12-30)

参考文献数

11

被引用文献数

1

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This study focuses on the Rikaisen, a unique alley typology in Iida City, Nagano Prefecture, based on the perspective that the generation of pedestrian activities by utilizing Rikaisens in downtown Iida is an effective measure for the future creation of a unique downtown full of attractions. The revitalization of downtown Iida is an urgent issue for the city, as a new station for the linear motor train will be opened in the outskirts of Iida in 2027. The purpose of this study is to define possibilities and challenges in utilizing Rikaisens and their surrounding buildings for generating pedestrian activities along Rikaisens, and to explore utilization measures and possible implementation processes. The research on Rikaisens is conducted through review of previous studies and literature, questionnaires to residents focusing on utilizing Rikaisens, interviews with people in charge in public and private sectors, and field surveys of the space along 24 Rikaisens in the downtown. Through these researches, the study reveals the following: Regarding the legal situation, a Rikaisen is not regarded as a road defined in the Building Standards Law, which causes multiple planning restrictions for the utilization of Rikaisens and adjacent properties; Regarding residents’ attitudes toward utilization of Rikaisens, in general, many residents are positive, but some neighbors on Rikaisens have concerns and oppositions due to the original purpose of Rikaisen as a disaster prevention passage and the development process with the provision of private properties; Regarding activities relating to Rikaisens, although the city has begun to take a positive stance on utilization, private organizations are confronting stagnation of utilizations due to economic deterioration as well as legal, social and institutional restrictions; Regarding spatial situations, the space along Rikaisens are diverse with various characteristics and does not hinder daytime walking, but on the other hand, Rikaisens are separated from adjacent lots by building walls and fences and with limited residual space except for parking lots, in addition to having a poor nighttime environment. The study defines possibilities and challenges in utilizing Rikaisens and their surrounding buildings based on these findings. Regarding the possibilities, the study defines 1) positive recognition and evaluation of Rikaisens as well as expectations for downtown revitalization by residents, 2) growing city officials’ momentum of utilizing Rikaisens, 3) day-time environment on Rikaisens suitable for utilization, and 4) presence of vacant buildings and underutilized properties as opportunity sites on Rikaisens. On the other hand, regarding the challenges, the study defines 1) neighbors’ concerns about deterioration of living environment by utilizing Rikaisens, 2) legal interpretation of Rikaisens and form of adjacent lots that restrict the utilization of Rikaisens, 3) limit of utilization of Rikaisens only by private organizations, and 4) lack of spatial integration of Rikaisens and their surrounding properties and shortage of destinations on Rikaisens. Finally, the study concludes possible measures and implementation processes for utilizing Rikaisens as follows: 1) examining possible measures of generating pedestrian activities according to the situation of each Rikaisen 2) revising the legal interpretation of Rikaisen, 3) implementing phased development processes from temporary to permanent utilization and building consensus with residents, and 4) promoting improvements, utilization and operation methods through the collaboration between the public and private sectors.

著者

久保田 勇希 佐々木 駿 向後 保雄 青木 卓哉 小笠原 俊夫 石田 雄一 山田 哲哉

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会論文集 (ISSN:13446460)

巻号頁・発行日

vol.64, no.2, pp.104-112, 2016 (Released:2016-04-05)

参考文献数

29

被引用文献数

3

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A new lightweight ablator was fabricated by the infiltration of a polyimide resin into a porous carbon material having three-dimensional network and open cell structure. In order to evaluate the performance of the ablator, the thermal response and recession resistance were evaluated using an arc wind tunnel. These properties were discussed from the viewpoint of the cell sizes of porous carbon material. With a decrease in the cell size, internal temperature of the ablator became lower. Microstructural observations revealed that the three-dimensional network structure of the ablator, which originates from the porous carbon preform, was maintained after the heating tests. Consequently, the recession resistance was better than those of existing ablators fabricated from carbon-fiber-based preform.

著者

末永 陽介 柳岡 英樹 菊池 護 佐々木 駿

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.83, no.852, pp.17-00160-17-00160, 2017 (Released:2017-08-25)

参考文献数

19

被引用文献数

1

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Experimental study was performed to reveal the response characteristics of a stretched cylindrical diffusion flame to sinusoidal oscillation of air flow velocity. The cylindrical flame used in this study has a convex curvature with respect to air stream and is formed in air stream. The fuel is methane, diluted with nitrogen, and the oxidizer is air. Oscillation frequency f is varied from 5 Hz to 250 Hz. Velocity at the outlet of air supplying nozzle was changed sinusoidally with four speakers. Velocity at the fuel nozzle outlet was kept constant. The air velocity at the nozzle outlet is measured using particle image velocimetry. Flame radius rf, flame thickness δ, and flame luminosity Lf are obtained by using high speed video camera. Results are summarized as follows: Though fluctuation amplitude of the velocity gradient of air stream Δga is constant with increasing f, that of the fuel stream Δgf increases. The fluctuation amplitude of rf varies to quasi-steady at low frequency, while the fluctuation amplitude is reduced with increasing f. Lf does not respond to quasi-steady at low frequency. The fluctuation amplitude of Lf has maximum value at 50 Hz and is larger than that for the steady flame corresponding to the velocity fluctuation. It is considered that this complex change of the flame luminosity with respect to f is related to δ/rf which is associated with the flame curvature effect, ga which affects the flame stretch effect, and gf which impacts fuel transport.

著者

田中 孝治 佐々木 駿作 池田 満 堀 雅洋

出版者

日本認知心理学会

雑誌

日本認知心理学会発表論文集 日本認知心理学会第14回大会

巻号頁・発行日

pp.112, 2016 (Released:2016-10-17)

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本研究では,自転車運転中の不安全行動の問題特性を明らかにするための足掛かりとして,一般的な知識として正しい行動を問う知識課題と自身が実際に選択する行動を問う意図課題の二種類の課題を用いて,自転車運転における知識と行動意図の不一致を定量化する(実験1)。さらに,定量化したデータから,不安全運転行動の意図形成について,時間的切迫感および不安全運転行動が引き起こす被害に対する関与(実験2),不安全運転行動の危険認知および安全運転行動のコスト認知の観点(実験1・2)から検討を加える。実験の結果,意図課題の方が知識課題よりも正答率が低く,知識と行動意図の不一致が示された。また,切迫感,コスト感,危険性の認知が,不安全運転行動の意図形成に影響を与えることが示された。さらに,自身が加害者となる可能性を提示された方が,被害者となる可能性が提示されるよりも不安全運転行動の意図が形成されることが示された。

著者

山田 勇樹 高野 真宏 佐々木 駿輔 久保 亮吾 山下 健一郎

出版者

一般社団法人 電気学会

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.134, no.5, pp.297-300, 2014 (Released:2014-05-01)

参考文献数

4

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