Search Results 1-20 of 170

  • AIRFLOW AROUND BUILDINGS IN HIGH DENSITY BLOCK OF METROPOLIS:Effects of Reynolds number on airflow between buildings and wind pressure on building walls based on LES  [in Japanese]

    SAJIMA Toshihiko , YAMANAKA Toshio , LIM Eunsu , KOBAYASHI Tomohiro , FUKUYAMA Kanji

    … In design stage of natural ventilation building, building engineers have to decide the size and number of ventilation devices, such as openings and chimneys or shafts. … In the wind tunnel test, the scale of the model and the wind velocity of approach flow are limited. …

    Journal of Environmental Engineering (Transactions of AIJ) (781), 319-326, 2021-03

    J-STAGE  AIJ 

  • Design method for easy set up structures by light weight material  [in Japanese]

    中原 浩之 , 新垣 和明 , 山本 憲司

    … The arches specimens were masonry arches consisted of EPS blocks which were tied up by outside ropes. … The experimental load versus deformation relations were estimated by the tri-linear model which was composed of the initial stiffness, reduced stiffness and maximum strength. … The authors verify the strength of the EPS arch against to the wind pressure according to the building code of Japan. …

    長崎大学大学院工学研究科研究報告 = Reports of Graduate School of Engineering, Nagasaki University 51(96), 43-47, 2021-01

    IR 

  • STABILITY AND OVERTOPPING CHARACTERISTICS OF WAVE-DISSIPATING WORKS WITH A NOTCH AT THE REAR END OF CROWN  [in Japanese]

    MATSUSHITA Hiroshi , HIRAISHI Tetsuya , KAWAMURA Hiroyuki , MASE Hajime

    <p> 空港施設など制限表面により護岸の嵩上げが難しい状況において,消波工と護岸の間に切欠きを設けなければならないことがある.このような特殊な形状の消波工断面について,大きな遊水部を持つような場合の研究は実施されているが,比較的小さな切欠きを有する消波工断面での研究例はほとんどない.本研究は天端の後端に三角形状の切欠きを有する消波工の安定性および越波特性を明らかにすることを目的として水 …

    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 76(2), I_85-I_90, 2020

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  • IMPROVEMENT OF INDOOR ENVIRONMENT BASED ON MULTIPLE INTERZONAL AIRFLOW ANALYSIS:Study on indoor environment of welfare facility for the elderly in winter  [in Japanese]

    TAKADA Satoru , IMAI Yuki , HOKOI Shuichi , OGURA Daisuke , IBA Chiemi

    … It is important to grasp the airflow distribution of whole the building quantitatively. … However, it is not easy to clarify it by measurements, especially for building with a large scale. … concentration in the building were measured through a winter. …

    Journal of Environmental Engineering (Transactions of AIJ) 85(770), 249-258, 2020

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  • A study on strategy for invigorating utilization of HPC in industry based on business building blocks model

    Lee Sang Min , Jeong Seok Chan

    … <p>In order to invigorate utilization of high-performance computing (HPC) in industries, we have described the business building block canvas and reconsidered on HPC service model that HPC service providers would take a strategic planning to give their own abilities to small industries. …

    Nonlinear Theory and Its Applications, IEICE 11(1), 78-89, 2020

    J-STAGE 

  • Constant-Round Client-Aided Two-Server Secure Comparison Protocol and Its Applications

    MORITA Hiraku , ATTRAPADUNG Nuttapong , TERUYA Tadanori , OHATA Satsuya , NUIDA Koji , HANAOKA Goichiro

    … <p>We present an improved constant-round secure two-party protocol for integer comparison functionality, which is one of the most fundamental building blocks in secure computation. … Our protocol is in the so-called <i>client-server model</i>, which is utilized in real-world MPC products such as Sharemind, where any number of clients can create shares of their input and distribute to the servers who then jointly compute over the shares and return the shares of the result to the client. …

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E103.A(1), 21-32, 2020

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  • COLLAPSE RISK PREDICTION OF BUILDING 30 IN GUNKANJIMA USING MOBILE IMAGE INSPECTION  [in Japanese]

    HAMAMOTO Takuji , KOBAYASHI Masazumi

    … <p>The collapse risk of building 30 in Gunkanjima is evaluated based on mobile image inspection using wearable cameras inside the building and a drone shot outside the building. … Collapse analyses of the 3D frame model of building 30 divided by four blocks are performed against vertical dead and live loads and horizontal earthquake loads for predicting the collapse risk of each block respectively.</p> …

    AIJ Journal of Technology and Design (60), 1001-1006, 2019-06

    J-STAGE  AIJ 

  • WIND PRESSURE COEFFICIENT DISTRIBUTION OF DETACHED HOUSES IN A DENSE RESIDENTIAL BLOCK  [in Japanese]

    TANIGUCHI Keiichiro , AKAMINE Yoshihiko

    … With this in mind, we started by surveying the blocks density of the main residential areas in Tokyo and calculated their average Gross Building Coverage Ratio (Gross BCR). … Hence, the Gross BCR of 33% was used to build the context model of the wind tunnel test whereas various experiments on the wind pressure acting on the wall/roof surface of the building under different conditions were made. …

    Journal of Environmental Engineering (Transactions of AIJ) (750), 679-689, 2018-08

    J-STAGE  AIJ 

  • ARCHITECTS ACTIVITY ON HISAO NAKAZA IN THE EARLY STAGE OF CONCRETE HOUSE POPULARIZATION IN OKINAWA  [in Japanese]

    KINJO Haruno , OGURA Nobuyuki

    …  Hisao Nakaza was one of a handful of architects who contributed to building activities in Okinawa before, during, and after the Second World War. … Building Engineers (O.S.A.B.E.). … He employed masonry construction methods, utilizing local materials from 1950 to 1953 when material procurement and factory equipment were incomplete for the Reinforced-Concrete (RC) building. …

    Journal of Architecture and Planning (Transactions of AIJ) (750), 1533-1542, 2018-08

    J-STAGE  AIJ 

  • EFFECT OF VARIATION OF URBAN BLOCK PATTERNS ON VARIATION OF URBAN BLOCK SIZES:-Relaxation of square-grid block patterns-  [in Japanese]

    USUI Hiroyuki

    …  Urban blocks and road networks are the basic spatial elements which compose urban form. … Since urban blocks are the geometrical inverse of road networks, urban block patterns are regarded as the results of plane tessellations by road networks. … In recent years, central government of Japan has promoted the land readjustment projects in order to meet the demands for large building lots in mega cities such as Tokyo. …

    Journal of Architecture and Planning (Transactions of AIJ) (745), 475-482, 2018-03

    J-STAGE  AIJ 

  • Tree-based Secure Comparison of Secret Shared Data

    Hiraku Morita , Nuttapong Attrapadung , Satsuya Ohata , Shota Yamada , Koji Nuida , Goichiro Hanaoka

    IEICE Proceeding Series (55), 557-561, 2018

    DOI 

  • Area Complex Adaptive Control of Building Multi-type Air-conditioning Facilities for Real-time Pricing  [in Japanese]

    NINAGAWA Chuzo , AOKI Yoshifumi , MORIKAWA Junji , INABA Takashi , KONDO Seiji , OTAKE Hiroyuki

    <p>将来,5 分毎といった短い時間で電力料金単価を大幅に変更するリアルタイム電気料金制度(Real-Time Pricing : RTP)が導入されるかもしれない。需要家はそれに適応する制御が必要となるであろう。ビルマルチ空調機においても事前料金情報を元に高額時間帯に電力抑制するよう予測制御することが研究されている。これまでは,空調エリア毎の快適性優先度に応じて室外機ブロック単位で抑 …

    Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 43(260), 23-30, 2018

    J-STAGE 

  • INFLUENCE OF TURBULENT INFLOW WITH DIFFERENT GENERATION METHOD ON FLOW FIELD IN URBAN STREET CANYON  [in Japanese]

    Tachibana Takumi , Noda Hiroshi , Kishida Takeshi , Miyashita Koichi , Sasaki Ryoji , Yoshie Ryuichiro

    <p>都市域の風環境をはじめとする環境影響評価等の実務では、風洞実験あるいは、CFD解析が用いられている。そのうち、CFD解析はRANSモデルが用いられることが多い。そのため、実務においてCFD解析技術は設計の検討段階で、比較的小規模な建築物を対象とした風環境の環境影響評価や大規模な建物周りの流れを確認する程度にとどまっている。こうした現状に計算負荷は大きいものの予測精度が、RANSモ …

    PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING 25(0), 205-210, 2018

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  • Product Proposal Aimed at Creating New Business Applying AR Technology to Intellectual Toys  [in Japanese]

    NISHIDA Ayako , OKUBO Sanshiro , OHMORI Teruo , KINOSHITA Mitsuhiro , SAKEMOTO Hiroaki , SUGIYAMA Norimasa , TSUZUKI Sayaka , NORIMUNE Fumiko

    <p>本研究では,ITベンチャー企業が知育玩具にAR(拡張現実)技術を適用したAR知育玩具について,新規事業を創出すると仮定し,情報収集と調査・分析を通じて事業立案の方策を検討した。AR及び知育玩具の各々の市場が拡大傾向にあること,両者を組合せた場合に相乗効果が見込まれることから,AR知育玩具の有望性が確認された。さらに,トピックモデル分析を用いて,全体を概観するマクロ分析からセミマク …

    The Journal of Information Science and Technology Association 68(3), 119-128, 2018

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  • Ultrahigh mobility and efficient charge injection in monolayer organic thin-film transistors on boron nitride

    Daowei He , Jingsi Qiao , Linglong Zhang , Junya Wang , Tu Lan , Jun Qian , Yun Li , Yi Shi , Yang Chai , Wei Lan , Luis K. Ono , Yabing Qi , Jian-Bin Xu , Wei Ji , Xinran Wang

    … Organic thin-film transistors (OTFTs) with high mobility and low contact resistance have been actively pursued as building blocks for low-cost organic electronics. … They also allow us to precisely model how the molecular packing changes the transport and contact properties. …

    Science Advances 3(9), e1701186, 2017-09-06

    IR 

  • The Turbulent Characteristic Pattern of Urban Canopy Flow within a Uniform Rectangular Roughness Blocks  [in Japanese]

    Sakuma Yuto , Tamura Tetsuro , Ozaki Hisaaki

    都市域における流体現象は,その幾何学形状の複雑さによる特有の力学的粗度効果により,局所的に変化することが知られている。その特殊な流体現象の変化は,拡散特性に対しても直接的な影響を与えることから,様々な都市モデル・条件の研究が行われてきた。本研究では,風上側見付面積の違いが流れ場へ与える影響として,平衡状態に至るまでの物理的機構を明確にする。その際キャノピー内にて特殊な事象が発生することを示し,さら …

    Summaries to Technical Papers of Annual Meeting, Japan Association for Wind Engineering 2017(0), 113-114, 2017

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  • A Design Method for Product-Service Systems based on Life Cycle Cost Model  [in Japanese]

    YE Bing , YUASA Kento , MITAKE Yuya , SHIMOMURA Yoshiki

    … Comparing traditional business model, the PSS designers need to consider more the value of all stakeholder in which involved. … Further, the authors analyze the dependency relationship between these PSS building blocks, and associates them with each life cycle phase of target PSS using a life cycle cost model. …

    The Proceedings of Design & Systems Conference 2017.27(0), 1409, 2017

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  • Analysis of Cardiac spiral wave dynamics at regional cooling using computer simulation model  [in Japanese]

    Seno Hiroshi , Tomii Naoki , Yamazaki Masatoshi , Honjo Haruo , Shibata Nitaro , Sakuma Ichiro

    <p>致死性心室性不整脈の原因として心臓内に発生する旋回性の電気的興奮波(Spiral Wave: SW)が知られている.先行研究において,心筋組織の局所を冷却した場合にSWが冷却領域の周辺を移動する事が報告されているが,その詳細な挙動原理は未だに明らかになっていない.一方で近年,定量的で詳細なSW解析手法として,位相分散解析が提案されている.そこで本研究では,局所冷却時のSWの挙動原 …

    Transactions of Japanese Society for Medical and Biological Engineering 55Annual(4AM-Abstract), 293-293, 2017

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  • The Microstructure of Mg<sub>98.5</sub>Zn<sub>0.5</sub>Y<sub>1</sub> Alloy with Long-Period Stacking Ordered Structure

    Xu Zhi-chao , Feng Zhong-xue , Shi Qing-nan , Yang Ying-xiang , Wang Xiao-qi

    … For the DS polycrystals, the LPSO exhibited a lamellar shape, whose unit cell was composed of two twin-related building blocks (ABCA-type and ACBA-type) which determined the physical and chemical properties of Mg<sub>98.5</sub>Zn<sub>0.5</sub>Y<sub>1</sub> … There were three atomic layers between two building blocks. …

    MATERIALS TRANSACTIONS 58(6), 862-867, 2017

    J-STAGE 

  • URBAN BLOCK DESIGN AND ENERGY ASSESSMENT FOR SMART BLOCK PLANNING USING SNOW AND WIND SIMULATIONS IN WINTER CITIES  [in Japanese]

    WATANABE Norihiro , SETOGUCHI Tsuyoshi , MATSUYAMA Tomoyuki , GUO Zhiming , TSUTSUMI Takuya

    … The study focused on the high-density blocks in downtown Sapporo, Hokkaido Japan (Fig. 5). … Building energy consumptions during winter in each urban block model were calculated by ‘Program for Primary Energy Consumption in Buildings’ …

    Journal of Architecture and Planning (Transactions of AIJ) 82(733), 735-744, 2017

    J-STAGE 

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