Search Results 1-20 of 430

  • RELIABILITY ANALYSIS ON FAILURE TREND OF AIR-CONDITIONING EQUIPMENT BY WEIBULL PROCESS MODEL  [in Japanese]

    KUBOI Daisuke , NISHIYA Sayuri , KOIKE Kazusa , KAWANO Masashi , ICHINOSE Masayuki , SUZUKI Kazuyuki

    … <p> In order to properly estimate the renewal and maintenance costs of air-conditioning equipment, it is necessary to establish the optimal renewal cycle considering equipment deterioration and failure. …

    Journal of Environmental Engineering (Transactions of AIJ) (781), 301-310, 2021-03

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  • EFFECT OF PREVENTIVE MAINTENANCE ON BRIDGE EXPANSION JOINTS AGAINST CORROSION AT STEEL GIRDER END PARTS  [in Japanese]

    KAITO Kiyoyuki , KOBAYASHI Kiyoshi , MIZUTANI Daijiro , NINOMIYA Yohei , KAWAI Ryoji

    <p> 橋梁は多様な部材によって階層的に構成された複雑な構造システムである.したがって,ある部材の劣化が他の部材の劣化過程に影響を与えるような部材間の関連性を考慮した上で,点検や補修のタイミングを決定する必要がある.本研究では,伸縮装置からの漏水に起因した鋼桁端部の腐食過程に着目する.具体的には,伸縮装置からの漏水の有無に応じて2種類の状態モードを定義し,モードごとに設定したハザード関 …

    Journal of Japan Society of Civil Engineers, Ser. F4 (Construction and Management) 77(1), 96-114, 2021

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  • A study on program management of technology development in digital economics.  [in Japanese]

    YAMAMOTO Hideo

    技術開発におけるP2Mの創造的統合マネジメントは、基礎研究からビジネス立ち上げまでの全体を俯瞰し関連部門間のコーディネーションを行う。このコンセプトを提示してから10年以上経過した。この間に、デジタル経済が急速に浸透し、商品のライフサイクルが短くなり、従来の産業分類を越えた新しいビジネスモデルモデルが台頭してきた。そのような環境の変化に対応する技術開発プログラムにおいては、ハードウェアとソフトウェ …

    Proceedings of International Association of P2M 2021.Spring(0), 1-14, 2021

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  • A NOVEL METHOD FOR STORING BIM DATA IN A GRAPH DB AND EXTRACTING INFORMATION:Devising a data model which is not affected by versions of IFC schema  [in Japanese]

    WATANUKI Tsutomu , YABUKI Nobuyoshi

    … The model includes huge data which is proceeded in its whole life cycle. … To improve the productivity of the design and construction process, an environment in which many stakeholders can share the 3D model data and work cooperatively and concurrently is needed. … Such an environment would be "BIM Data Sharing System" …

    Journal of Architecture and Planning (Transactions of AIJ) (772), 1377-1385, 2020-06

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  • Opportunities of System of Systems Engineering to enhance the Circular Economy for Lithium Ion Batteries

    Mennenga Mark , Sina Rudolf , Steffen Blömeke

    … This paper discusses the foundations and methodological approaches of System of Systems Engineering (SoSE) to support a digitalized CE. … A literature review of the concept of SoS and some relevant methods, including a process-oriented framework for conceptualizing SoS in a life cycle engineering context, is presented. …

    Proceedings of JSPE Semestrial Meeting 2020A(0), 15-16, 2020

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  • Comparison of bio-drying MBT with other energy recovery system in terms of energy balance and life cycle CO<sub>2</sub> emission

    Ham Geun-Yong , Matsuto Toshihiko

    … <p>In this study, four energy recovery systems from municipal solid waste were compared in terms of life cycle energy and CO<sub>2</sub> … Two of these were a type of mechanical biological treatment, including a combined system of anaerobic digestion (AD) and incineration after mechanical separation, and bio-drying followed by mechanical separation for recovering solid recovered fuel (SRF). …

    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 31(0), 461, 2020

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  • Environmental Impacts of Fuel Cell Assisted Bicycles in a Sharing Scheme

    HOSOBUCHI Emi , MISAKI Chiharu , KATAYAMA Noboru , LONG Yin , DOWAKI Kiyoshi

    <p>近年,環境負荷の小さい交通手段として,コミュニティサイクル(シェアサイクル)が注目を集めている。本研究では,環境負荷低減や,バイオマスエネルギー(下水汚泥等)由来の水素燃料の利用を考慮した,自転車シェアリングシステムを検討する。従来のコミュニティサイクルには,リチウムイオン電池を搭載した電動アシスト自転車が用いられているが,本研究ではその代替システムとして,航続距離の延長と環境負 …

    Journal of the Japan Institute of Energy 99(11), 230-235, 2020

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  • Potential Impacts of the European Union's Circular Economy Policy on Japanese Manufacturers

    Umeda Yasushi , Kitagawa Kazunori , Hirose Yayoi , Akaho Keiko , Sakai Yuko , Ohta Makoto

    … In regard to the promotion of circular businesses, including remanufacturing, product-service system (PSS), and digital platforms, this policy may change the shape of the EU market and the core of market competition. …

    International Journal of Automation Technology 14(6), 857-866, 2020

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  • Special Issue on Design and Manufacturing for Environmental Sustainability

    Umeda Yasushi

    … To approach environmental sustainability, we should promote various technologies related to ecodesign, process technologies, business strategy, and digital technology. … At the same time, we must focus on life cycle design and management, an indispensable technology which synthesizes a sustainable circulation system by integrating the technologies mentioned above. … develop life cycle design methods. …

    International Journal of Automation Technology 14(6), 855-856, 2020

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  • Digital twin-driven 3D visualization monitoring and traceability system for general parts in continuous casting machine

    HAN Zhoupeng , LI Yan , YANG Mingshun , YUAN Qilong , BA Li , XU Erbao

    … To acquire the service information of each general part under the environment of high temperature and serious oil pollution for predicting remaining life and preventative maintenance, a digital twin-driven monitoring and traceability system for general parts in continuous casting machine is proposed. … After that, an assembly model based on polychromatic sets is built for expressing and describing the assembly relationships and assembly process of general parts. …

    Journal of Advanced Mechanical Design, Systems, and Manufacturing 14(7), JAMDSM0100-JAMDSM0100, 2020

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  • Similarity in Linear Viscoelastic Behaviors of Network Formation and Degradation Processes

    Katashima Takuya , Kagami Ryo , Chung Ung-il , Sakai Takamasa

    … <p>The design of the network formation and degradation processes is required to control hydrogel's life cycle. … In this study, we utilized the Tetra gel with slow degradation units to observe a continuous process from network formation to degradation of a single hydrogel. … We measured the time-development of the linear viscoelastic properties during the network formation and degradation processes using a single system. …

    Nihon Reoroji Gakkaishi 48(4), 191-198, 2020

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  • Oil Palm Empty Fruit Bunch as a Promising Feedstock for Biorefinery Products: A Holistic Approach with Economic, Energy, and Environmental Consideration

    PUTRA Agusta Samodra , NOGUCHI Ryozo , AHAMED Tofael , OHI Hiroshi

    <p>近年,オイルパームの空果房(EFB)は,オイルパームプランテーションの有機堆肥の原料として利用されているが,EFBは豊富な炭素源物質であり,有機堆肥以外の用途に対する貴重な原料と考えられている。本論文では,環境影響評価(LCA),ライフサイクルコスト計算(LCC),累積エネルギー需要量(CED)を用いて,EFBを原料とした,溶解パルプとフルフラールの共同生産の実現可能性を評価した …

    Journal of the Japan Institute of Energy 99(9), 143-152, 2020

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  • Construction and Evaluation of Platform for Superheated Gasification Power Generation System using Waste Biomass  [in Japanese]

    TANAKA Masaomi , SEGUCHI Hiroki , SUGAWARA Ryunosuke , Alvaro Quiles , SAITO Atsushi , MATSUMURA Eriko , SENDA Jiro

    … <p>This research is aimed to construct a platform for power generation system using waste biomass. … The platform is introduced three types of biomass energy conversion methods, which are superheated steam gasification system, dry methane fermentation system, and direct combustion system. …

    The Proceedings of Conference of Kansai Branch 2020.95(0), 09_910, 2020

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  • Life Cycle Assessment for Bioethanol Production from Oil Palm Frond Juice in an Oil Palm Based Biorefinery

    Yusof Siti Jamilah Hanim Mohd , Roslan Ahmad Muhaimin , Khairul Nadiah Ibrahim , Abdullah Sharifah Soplah Syed , Zakaria Mohd Rafein , Hassan Mohd Ali , Shirai Yoshihito

    … A life cycle assessment (LCA) with the gate-to-gate approach was performed with the aid of SimaPro version 8.0 whereby ten impact categories were evaluated. … This was due to a substantial usage of nutrient during this process, which consumes high energy for its production thus contributing a significant burden to the surrounding. …

    Sustainability 11(24), 6928-1-6928-14, 2019-12-05

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  • SYSTEM ARCHITECTURE MODEL FOR CONSTRUCTION PROJECT AND THE APPLICATION  [in Japanese]

    TOMII Tatsuru , MAKANAE Koji

    <p> スマート社会における建設プロジェクトでは,フィジカル空間とサイバー空間が関係しあう複雑なライフサイクルになることが考えられる.本論文は,複雑化する建設プロジェクトに適用するためのシステムアーキテクチャモデルを提示する.このモデルは,プロジェクトの各プロセスの対象範囲に基づいてプロジェクトライフサイクルを階層化し,システム要素とプロセスを対応づけることで,プロセスの責任範囲を明確 …

    Journal of Japan Society of Civil Engineers, Ser. F3 (Civil Engineering Informatics) 75(2), I_132-I_140, 2019

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  • OPTIMIZATION OF WATER SUPPLY PIPE REPLACEMENT PLANNING TO MINIMIZE LIFE CYCLE COST INCLUDING SEISMIC RISK ―A PROPOSAL FOR AN EVALUATION METHOD USING MULTI-EVENT MODEL―  [in Japanese]

    HASEGAWA Kohei , ARAI Yasuhiro , KOIZUMI Akira

    <p> 老朽化が進む水道管路を限られた財源で合理的に更新する手法として,ライフサイクルコスト(LCC)を指標とした管路更新モデルがこれまで提案されてきた.しかし,水道管理の重要な一要素である地震リスクについては,複雑な確率事象であるため金銭化は容易ではなく,LCCに含まれてこなかった.そこで本研究では,政府によって詳細に整備された震源リストより被害を及ぼし得る震源を抽出し,個別の発生確 …

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 75(7), III_73-III_84, 2019

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  • Optimization of the Design and Construction Process of a Heat-Source System Utilizing BIM:-Application of optimization of a design process around a cooling water system of an absorption chiller-  [in Japanese]

    YAJIMA Kazuki , FUKUI Masahide , AKASHI Yasunori , LIM Jongyeon

    <p>設計者やオーナーが熱源システムの環境性と経済性の情報を継続的に得られる設計・施工プロセスの最適化の構築を目的とし,それを実現するためのエネルギー/コストシミュレーションと BIM とシミュレーションの連携プログラムの一部機能を開発した。開発したシミュレーションと連携プログラムの一部機能を用いて、既存建物の熱源システムに設計プロセスの最適化を適用し,熱源システム構成ごとにライフサイ …

    Transactions of the Society of Heating,Air-conditioning and Sanitary Engineers of Japan 44(264), 23-33, 2019

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  • Deriving Challenges through Clarification of Areas to Strengthen the HR System:Using A Matrix with the Three Axes of Target Employee, Life Cycle Stage, and HRM Policy Choices

    SATO Yusuke , KOBAYASHI Nobuyuki , SHIRASAKA Seiko

    … This study aims to derive challenges by reviewing the papers which refer to the relation among HRM Policy Choices, HR Outcomes, and Feedback Process to HRM Policy Choices from HR Outcomes for revealing areas that have been studied and those that have not. … As a result, there was only one piece of research into the construction and operation of a HR System which combined the Harvard Model with Systems Engineering. …

    International Journal of Japan Association for Management Systems 11(1), 91-101, 2019

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  • A SAFETY-CRITICAL SOFTWARE RELIABILITY ANALYSIS METHOD BASED ON STATISTICAL MODEL CHECKING AND BAYESIAN THEORY

    MA Zhanguo , PENG Minjun , YOSHIKAWA Hidekazu , YUAN Huayu , YANG Bo

    … The software in the digital reactor protection system is the safety-critical software. … In addition, the software for the safety-critical system must be verified and validated independently and the software life cycle development process must be reviewed rigorously. … The proposed method can be applied to the early phase and the later phase of the software development life cycle. …

    The Proceedings of the International Conference on Nuclear Engineering (ICONE) 2019.27(0), 1538, 2019

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  • Developing a Cl recovery process for PVC wastes under the guideline of ex-ante life cycle assessment

    Lu Jiaqi , Borjigin Siqingaowa , Kumagai Shogo , Fukushima Yasuhiro , Ohno Hajime , Kameda Tomohito , Saito Yuko , Yoshioka Toshiaki

    … <p>Ex-ante life cycle assessment (LCA) is an emerging strategy to guide the development of technologies on laboratory scale for a better environmental performance. … This case study focused on a chlorine (Cl) circulation system by Cl recovery from Poly (vinyl chloride) (PVC) wastes. … Thus, authors suggested a Cl recovery process for PVC wastes to realize a sustainable Cl cycle. …

    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 30(0), 539, 2019

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