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MIWA Takashi
Graduate School of Maritime Sciences / Department of Maritime Sciences
Associate Professor

Researcher basic information

■ Research Areas
  • Aerospace, marine, and maritime Engineering / Marine and maritime engineering

Research activity information

■ Paper
  • Peggy Shu-Ling Chen, Hongjun Fan, Hossein Enshaei, Wei Zhang, Wenming Shi, Nagi Abdussamie, Takashi Miwa, Zhuohua Qu, Zaili Yang
    This paper investigated the opportunities and challenges of integrating ports into hydrogen (H2) supply chains in the context of Australia and Japan because they are leading countries in the field and are potential leaders in the upcoming large-scale H2 trade. Qualitative interviews were conducted in the two countries to identify opportunities for H2 ports, necessary infrastructure and facilities, key factors for operations, and challenges associated with the ports’ development, followed by an online survey investigating the readiness levels of H2 export and import ports. The findings reveal that there are significant opportunities for both countries’ H2 ports and their respective regions, which encompass business transition processes and decarbonisation. However, the ports face challenges in areas including infrastructure, training, standards, and social licence, and the sufficiency and readiness levels of port infrastructure and other critical factors are low. Recommendations were proposed to address the challenges and barriers encountered by H2 ports. To optimise logistics operations within H2 ports and facilitate effective integration of H2 applications, this paper developed a user-oriented working process framework to provide guidance to ports seeking to engage in the H2 economy. Its findings and recommendations contribute to filling the existing knowledge gap pertaining to H2 ports.
    MDPI AG, Jul. 2024, Hydrogen, 5(3) (3), 436 - 458
    [Refereed]
    Scientific journal

  • Adi Mas Nizar, Takashi Miwa, Makoto Uchida
    Faculty of Navigation, 2024, TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, 18(3) (3), 593 - 599
    Scientific journal

  • Adi Mas Nizar, Takashi Miwa, Makoto Uchida
    Abstract Work in the engine department is currently demanding more monitoring task. However, the current alarm systems that support operators during troubleshooting are deficient. In many cases, operators reach the engine control room (ECR) only to find a false alarm. This problem is likely to aggravate in the future as operators work in smaller numbers or even alone; therefore, task prioritization should be considered in a given context. Therefore, this study examines the application of head-worn displays in engine resources management to improve situational awareness (SA), trust in automation, and workload. A human-subject experiment was conducted using an engine plant simulator. The participants simultaneously performed maintenance and monitoring tasks in two scenarios: work conditions assisted with and without information on the head-worn display used as a cognition aid. Subjective measurement involved filling in questionnaires after each trial, whereas objective measurement used the simulator-recorded data. The results show that the availability of engine parameters and alarm indicators on a head-worn display is less significant in improving situational awareness. However, it can still help develop trust in automation and lower the workload. In addition, head-worn displays improve participants’ prioritization in a multi-tasking environment. The results indicate that examining these findings in actual work environments can help realize the future application of head-worn displays in ship operations.
    Springer Science and Business Media LLC, Jun. 2023, WMU Journal of Maritime Affairs
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Peggy Shu-Ling Chen, Hongjun Fan, Hossein Enshaei, Wei Zhang, Wenming Shi, Nagi Abdussamie, Takashi Miwa, Zhuohua Qu, Zaili Yang
    Elsevier BV, May 2023, International Journal of Hydrogen Energy, 48(46) (46), 17351 - 17369
    [Refereed]
    Scientific journal

  • Ishida Tatsuro, Miwa Takashi, Uchida Makoto
    The Japan Institute of Marine Engineering, Mar. 2023, Marine Engineering, 58(2) (2), 157 - 165, Japanese

  • Adi Mas Nizar, Masumi Nakamura, Takashi Miwa, Makoto Uchida
    Abstract Recent development and projection of ship operations as a sociotechnical system is getting more complex. In order to successfully emulate a high-reliability organization with a balance between operational efficiency and safety, the shipping companies have to grab a well understanding of the operating performance. However, because the teams are distributed spatially and temporally, a misalignment of shared situation awareness casually exists. We extended Rasmussen’s dynamic safety theory and adjusted it in the context of ship management performance. A modelling study using system dynamics was done to illuminate how the feedback loops construct the interaction between safety, efficiency, and workload. The simulation result shows that the operations behave following the safety and efficiency pressures created by existing goals and boundaries. The model is also able to capture these trade-offs in different variety of operation scenarios. Application such modelling may provide the managers with a better understanding and valuable insight to implement the strategies to sustain safe operations.
    IOP Publishing, Sep. 2022, IOP Conference Series: Earth and Environmental Science, 1081(1) (1), 012002 - 012002
    Scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • Adi Mas Nizar, Takashi Miwa, Makoto Uchida
    Springer Science and Business Media LLC, May 2022, WMU Journal of Maritime Affairs, 21(3) (3), 401 - 419
    Scientific journal

  • Gamini Lokuketagoda, Takashi Miwa
    Corresponding, Journal of Advanced Marine Engineering and Technology, Feb. 2022, Journal of Advanced Marine Engineering and Technology, 46(1) (1), 40 - 46
    [Refereed]
    Scientific journal

  • Adi Mas Nizar, Takashi MIWA, Takashi OZAKI, Makoto UCHIDA
    The Japan Institute of Marine Engineering, Nov. 2021, Marine Engineering, 56(6) (6), 961 - 969
    Scientific journal

  • Tatsuro Ishida, Takashi Miwa, Makoto Uchida
    Springer Science and Business Media LLC, Sep. 2021, WMU Journal of Maritime Affairs, 20(3) (3), 335 - 355
    Scientific journal

  • Nozomi Takemura, Gamini Lokuketagoda, Masumi Nakamura, Makoto Uchida, Takashi Miwa
    Journal of Advanced Marine Engineering and Technology, Aug. 2020, Journal of Advanced Marine Engineering and Technology, 44(4) (4), 344 - 350
    Scientific journal

  • Tatsuro Ishida, Takashi Miwa, Makoto Uchida
    Japan Society of Naval Architects and Ocean Engineers, 2020, Journal of the Japan Society of Naval Architects and Ocean Engineers, 32, 269 - 277
    Scientific journal

  • Adi Mas Nizar, Takashi Miwa, Makoto Uchida, Masumi Nakamura
    Springer International Publishing, 2020, Advances in Intelligent Systems and Computing, 49 - 57
    In book

  • 藤野 俊和, 野村 昌孝, 井上 順広, 前田 和幸, 川原 秀夫, 小島 隆志, 大出 剛, 三輪 誠, 角 和芳, 吉田 肇, 北原 辰巳, 段 智久, 氏平 信輔, 林 祐亮, 西尾 澄人, 鈴木 信宏
    The Japan Institute of Marine Engineering, 2020, Marine Engineering, 55(4) (4), 457 - 471, Japanese

  • Proposal and development of ERS
    Hiromasa Ikawa, Takashi Miwa, Tomohisa Dan
    The Japan Institute of Marine Engineering, Oct. 2019, Proceedings of 89th Marine Engineering Conference, Japanese
    Symposium

  • A study on work load evaluation method and quantitative evaluation method for engine-room resource management training
    Tatsuro Ishida, Takashi Miwa, Makoto Uchida
    This study aims to propose work load evaluation method and quantitative evaluation method of trainee's non-technical skill regarding ERM training. The necessity of work load evaluation during simulator training exercise is considered to evaluate trainee's performance. The effect of the trainee's work load during training exercise is evaluated by objective evaluation using VACP (Visual, Auditory, Cognitive, Psychomotor) method and heart rate data comparing subjective evaluation NASA-TLX (Task Load Index). We studied the difference of trainee's work load and biological reaction during training exercise. VACP work load scale is modified for ERM training exercise. For quantitative evaluation, we used IMO model course 2.07 2017 Edition evaluation form: behavior markers for non-technical skills. Evaluation criteria is based on sample evaluation form and evaluation markers are modified. This paper report the result of both evaluation method from recorded video and audio data of ERM training evaluation experiment.
    International Association of Maritime Universities, 2019, 20th Commemorative Annual General Assembly, AGA 2019 - Proceedings of the International Association of Maritime Universities Conference, IAMUC 2019, 158 - 167, English
    International conference proceedings

  • Ishida Tatsuro, Miwa Takashi, Uchida Makoto
    The Japan Society of Naval Architects and Ocean Engineers, 2019, Conference Proceedings The Japan Society of Naval Architects and Ocean Engineers, 28, 529 - 532, Japanese

  • 藤野 俊和, 野村 昌孝, 井上 順広, 前田 和幸, 川原 秀夫, 小島 隆志, 大出 剛, 三輪 誠, 角 和芳, 吉田 肇, 北原 辰巳, 段 智久, 柿木 隆宏, 林 祐亮, 西尾 澄人, 鈴木 信宏
    The Japan Institute of Marine Engineering, 2019, Marine Engineering, 54(4) (4), 552 - 567, Japanese

  • Study on the abnormality diagnosis with listening rod (1st Report)
    Hiromasa Ikawa, Takashi Miwa, Tomohisa Dan
    The Japan Institute of Marine Engineering, Oct. 2018, Proceedings of the 88th Conference on Marine Engineering (Okayama), pp.41 - 42, Japanese
    Symposium

  • Proposal Study to Application of Existing Simulator for Next-Generation Maritime Education
    MIWA Takashi, Gamini Lokuketagoda, NAKAMURA Masumi, SASAWAKI Yuh, KADO Maki, UCHIDA Makoto
    IMLA ICERS Committee, Oct. 2018, The 14th International Conference on Engine Room Simulators (ICERS 14 Manila), English
    [Refereed]
    International conference proceedings

  • Study on Examination Methods for ERM Skills
    NAKAMURA Masumi, URABE Hiroki, MATSUNAGA Naoya, KOBAYASHI Ippei, NAKANE Norimichi, NAKATA Zen, YAMASHITA Satoshi, MIWA Takashi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Oct. 2018, Proceedings of the Conference of the Japan Institute of Marine Engineering, (88) (88), Japanese
    Research society

  • Engine Characteristic due to Cold Start of Diesel Engine
    Takuya Nakaguchi, Takashi Miwa, Ichiro Asano, Tomohisa Dan
    The Society of Naval Architects of Korea (SNAK), Oct. 2018, 8th Pan Asian Association of Maritime Engineering Societies, Advanced Maritime Engineering Conference 2018 (Busan), pp.312 - 318, English
    [Refereed]
    International conference proceedings

  • X-Ray High Speed Visualization and Measurement of Cavitation Flow in a Nozzle under Transient Injection Condition
    KOTANI Kazuya, Prasetya Rubby, NISHIHARA Ayumi, MIWA Takashi, SOU AKIRA, MOON Seoksu, Raditya Hendra Pratama, WADA Yoshitaka, UEKI Yoshiharu, YOKOHATA Hideaki
    ILASS International, Jul. 2018, Proc. 14th Triennial International Conference on Liquid Atomization and Spray Systems (ICLASS 2018), English
    [Refereed]
    International conference proceedings

  • High Speed Visualization of String Cavitation and Tomographic Stereo PIV in a Multi-Hole Diesel Injector
    DEGUCHI Shinichiro, Prasetya Rubby, NAKAMURA Ryoto, MIWA Takashi, SOU AKIRA, OKI Junichi, NAKASHIMA Akira, OGATA Yoichi, NISHIDA Keiya, WADA Yoshitaka, UEKI Yoshiharu, YOKOHATA Hideaki
    It is essential to control fuel spray characteristics in diesel engines to reduce exhaust gas emissions and improve thermal efficiency. Not only turbulent cavitation flow in a nozzle but also string cavitation in a sac of multi-hole fuel injectors plays an important role in fuel spray characteristics. However, string cavitation occurs randomly, and its appearing condition, mechanism and effects on spray characteristics remain unknown. In this study diesel fuel with α-methyl naphthalene is injected at various constant flow rates and various needle lifts through an acrylic three-hole mini-sac injector into ambient air at room temperature. Cavitation in the holes, string cavitation in the sac, and injected fuel sprays are observed simultaneously using a high speed camera to clarify the occurring condition of unsteady string cavitation and its effects on injected spray. Three components of liquid velocity in three-dimensional space inside the sac is measured by tomographic stereo PIV (Particle Image Velocimetry) using four digital cameras and string cavitation in the sac and the injected fuel near the nozzle is captured simultaneously using a high speed camera. As a result, it is found that string cavitation sometimes occur at low needle lift which increases fuel liquid jet angle, and is caused by a strong vortex flow around it in the sac, while at high needle lift string cavitation rarely occurs due to a relatively uniform downward flow in the sac, which does not strongly influence the discharged spray. Just after the appearance of string cavitation, a swirling flow in the nozzle forms a hollow cone spray.
    ILASS International, Jul. 2018, Proc. 14th Triennial International Conference on Liquid Atomization and Spray Systems (ICLASS 2018), English
    [Refereed]
    International conference proceedings

  • X-Ray Imaging of Transient Cavitation Motion in Nozzles under Steady Injection Condition
    Prasetya Rubby, MIWA Takashi, SOU AKIRA, MOON Seoksu, WADA Yoshitaka, UEKI Yoshiharu, YOKOHATA Hideaki
    Jun. 2018, Proc. 10th International Cavitation Symposium (CAV2018), English
    [Refereed]
    International conference proceedings

  • MIWA Takashi, WU Yanbin, SASAWAKI Yuh, KADO Maki, Gamini Lokuketagoda, UCHIDA Makoto
    The Japan Institute of Marine Engineering, May 2018, Journal of the Japan Institute of Marine Engineering, 53(3) (3), 423 - 428, English
    [Refereed]
    Scientific journal

  • WU Yanbin, SASAWAKI Yuh, KADO Maki, Hossein Enshaei, UCHIDA Makoto, MIWA Takashi
    The Korean Society of Marine Engineering, Feb. 2018, Journal of the Korean Society of Marine Engineering, 42(2) (2), 136 - 141, English
    [Refereed]
    Scientific journal

  • Yanbin Wu, Takashi Miwa, Makoto Uchida
    Human fatigue caused by either physical exertion or mental strain is one of the most significant factors that constrain operator’s functional capability to fulfill specific tasks. To ensure working performance and to improve occupational health, this paper aims to develop a quantitative method to evaluate operator fatigue during conducting pipeline works. A Japanese version of Borg’s Rating of Perceived Exertion (RPE) scale and heart inter-beat intervals (RR interval) are measured in an experiment study. Hurst exponent (HE) is extracted from detrended fluctuation analysis (DFA) to define the fractal structures of RR interval time series. Results show that HE during working condition is significantly higher than during rest condition.
    Springer Verlag, 2018, Advances in Intelligent Systems and Computing, 602, 446 - 454, English
    [Refereed]
    International conference proceedings

  • String Cavitation and 3D PIV in Multi-Hole Injector
    NAKANO Hiroaki, Rubby Prasetya, DEGUCHI Shinichiroo, MIWA Takashi, SOU AKIRA, NISHIDA Keiya, NAKASHIMA Akira, WADA Yoshitaka, UEKI Yoshiharu, YOKOHATA Hideaki
    ILASS-Asia, Oct. 2017, Proc. of the 19th Annual Conference on Liquid Atomization and Spray Systems, Asia (ILASS-Asia 2017), English
    [Refereed]
    International conference proceedings

  • X-Ray Imaging and Measurement of Cavitation Flow in Fuel Injector Nozzles with Various Geometries
    Prasetya Rubby, KASAHARA Takumi, KOTANI Kazuya, MIWA Takashi, SOU AKIRA, MOON Seoksu, WADA Yoshitaka, UEKI Yoshiharu, YOKOHATA Hideaki
    Oct. 2017, Proc. of the 19th Annual Conference on Liquid Atomization and Spray Systems, Asia (ILASS-Asia 2017), English
    [Refereed]
    International conference proceedings

  • Study on Reducing Communication Stress in Marine Engine room Situation
    MIWA TAKASHI, Wu Yanbin, Yuh Sasawaki, Maki Kado, Gamini Lokuketagoda, Makoto Uchida
    It is a fact that the correct and safe operation of machinery by engineers, is of paramount
    importance for safe navigation of vessels. Added to this fact is the effective communication and clear
    manifestation of intentions by engineers while managing the engine room resources at their disposal.
    Proper communication is an essential requirement in engine room in special situati
    Oct. 2017, Proceedings of the 11th International Symposium on Marine Engineering (ISME), 53(3) (3), English
    [Refereed]
    International conference proceedings

  • Study on Evaluation of Maritime Engineer’s Working Performance and Mental Work Load in Multi-Tasking Situation
    NAKAMURA Tomohiko, WU Yanbin, MIWA Takashi, UCHIDA Makoto
    Oct. 2017, Proceedings of the 11th International Symposium on Marine Engineering, English
    International conference proceedings

  • Conceptual Proposal of Advanced Sensory Marine Engine Room Simulator
    Hiromasa Ikawa, Takashi Miwa, Tomohisa Dan, Yoshiharu Itami
    In the engine room of a vessel, an engineer experientially judges abnormalities, failure, etc. of machinery with the 5 senses, namely senses of smelling, tasting, seeing, touching and hearing. Except of tasting, other 4 senses are required in the engine watch keeping. The ability of these judgement methods are very important for marine engineers. Authors propose the sensory eng
    The Korean Society of Marine Engineering, Oct. 2017, International Symposium on Marine Engineering and Technology 2017 (ISMT2017), pp.47 - 49, English
    International conference proceedings

  • Improvement of Engine Room Simulator Visibility for Maritime Education Training
    MIWA Takashi, WU Yanbin, SASAWAKI Yuh, KADO Maki, Gamini Lokuketagoda, UCHIDA Makoto
    IMLA ICERS Committee, Sep. 2017, The 13th International Conference on Engine Room Simulators (ICERS 13 Odessa), English
    [Refereed]
    International conference proceedings

  • Changes in work accuracy in a noisy environment : A case of work accuracy in the marine engine room environment
    Takashi MIWA, Yanbin Wu, Makoto Uchida, Yuh Sasawaki, Maki Kado, Gamini Lokuketagoda
    It is a requirement that the noise level in the engine rooms of modern ships meet the International Maritime Organization
    (IMO) noise level code criteria. This standard comes as it had been revealed that, in noisy environments, ship engineers are
    uncomfortable and lack concentration, and as a result might experience a reduction in work accuracy. In a noisy environment, it has
    Journal of the Korean Society of Marine Engineering, Jun. 2017, Journal of the Korean Society of Marine Engineering, 41(5) (5), 461 - 466, English
    [Refereed]
    Scientific journal

  • Yanbin Wu, Takashi Miwa, Makoto Uchida
    Mental workload (MWL) is one of core elements of human factor construct reflecting arousal level, and its optimisation is crucial to maintain favourable operator functional state. However, sensible, reliable, and diagnostic measurement of MWL is essential for applications of adaptive aiding system design, usability testing, and seafarers' training. To develop robust MWL measures, 10 participants voluntarily participated in a simulator-based experiment study. During this study, the participants carried out standard four-level calibration tasks and simulated four-level maritime operation tasks, their heart rate and electroencephalogram (EEG) were continuously measured using a heart rate sensor and an ambulatory EEG device, which includes an accelerometer to distinguish signal corruption epochs induced by body movement artefact. After each task, NASA Task Load Index was collected as subjective measurement. One-way analysis of variance was used to test the sensitivity of MWL measures and Pearson's correlation coefficients were calculated. The significantly sensitive indices for n-back task and simulator-based maritime operation task were different, supporting the limited cognitive resource pool theory. EEG features showed higher sensitivity than heart-rate-related measures.
    TAYLOR & FRANCIS LTD, 2017, JOURNAL OF MARINE ENGINEERING AND TECHNOLOGY, 16(2) (2), 61 - 69, English
    [Refereed]
    Scientific journal

  • Y. Wu, T. Miwa, M. Uchida
    While simulator based maritime training is widely implemented under international maritime organization (IMO) convention and model courses, troublesome issues such as objective evaluation of training effectiveness remain unsolved. Physiological computing system (PhyCS) refers to an innovative bidirectional human computer interaction which is achieved by monitoring, analysing, and responding to operators' psychophysiological activities in real-time. With the development of wearable devices, it becomes promising to apply PhyCS, which was considered as a laboratory technology, in real-world scenarios. In our experience utilizing view tracker, portable heart beat sensor, electroencephalogram device, and web-cameras in simulator based maritime training, PhyCS shows potential for advanced applications in operator performance assessment, usability tests, and adaptive training. However, ambulatory working environment, body movement artefact, and model verification are intricate obstacles that constrain its applications in the real world. By examining the advantages and obstacles, this paper aims to develop guidelines to apply PhyCS in the real-world.
    Royal Institution of Naval Architects, 2017, Transactions of the Royal Institution of Naval Architects Part A: International Journal of Maritime Engineering, 159(A2) (A2), 149 - 157, English
    [Refereed]
    Scientific journal

  • X-Ray High-Speed Visualization of Cavitation in Fuel Injector and Discharged Liquid Jet
    SOU AKIRA, MIWA Takashi, Rubby Prasetya, KASAHARA Takumi, MOON Seoksu, WADA Yoshitaka, YOKOHATA Hideaki
    Nov. 2016, Proc. 18th Annual Conference of Liquid Atomization and Spray Systems - Asia (ILASS-Asia 2016), Paper 137, English
    [Refereed]
    International conference proceedings

  • Two barriers of using EEG and HRV to evaluate operator functional state in maritime simulator operations
    Yanbin Wu, Takashi Miwa, Makoto Uchida
    ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, Jul. 2016, INTERNATIONAL JOURNAL OF PSYCHOLOGY, 51, 1148 - 1149, English
    [Refereed]
    International conference proceedings

  • Study on engine room communication under the marine engine simulator environment
    Takashi Miwa, Yanbin Wu, Masumi Nakamura, Makoto Uchida
    ROUTLEDGE JOURNALS, TAYLOR & FRANCIS LTD, Jul. 2016, INTERNATIONAL JOURNAL OF PSYCHOLOGY, 51, 226 - 226, English
    [Refereed]
    International conference proceedings

  • NAKAMURA Masumi, MIWA Takashi, UCHIDA Makoto

    International convention on Standards of Training, Certification and Watch keeping for seafarers (STCW) was amended in Manila, the Philippines in 2010. The amendments will come into force on 1 January 2017. To meet the competence requirements for marine engineers, the implementation of Engine-room Resource Management training (hereafter, ERM training) was adopted as mandatory. The role of a practical ERM training model has become more important for marine engineers working in a complex system. The purpose of this study is to examine which ERM training best suits engine-room simulation education. First, in this paper, the characteristics of total human errors were investigated using 298 marine accident records from the Japan Marine Accident Inquiry. Second, the common factors of these accident records, namely the latent factors, were determined using covariance structure analysis. Furthermore, System Dynamics (SD) was employed to find the relationships between the latent factors and the technical support to gather the clues for a practical ERM training method. The model includes a data set of actual cases from records of marine accident inquiries and a hypothetical data set. The results show that the support of the onshore management and behavior characteristics of engineers which influence each other in a delicate balance could be expressed in a chronological order.

    The Japan Institute of Marine Engineering, Mar. 2016, Journal of the Japan Institute of Marine Engineering, 51(2) (2), 223 - 229, Japanese
    [Refereed]
    Scientific journal

  • Miwa Takashi
    The Japan Institute of Marine Engineering, 2016, Journal of The Japan Institute of Marine Engineering, 51(3) (3), 327 - 331, Japanese

  • Study on evaluation of communication aptitude in maritime education with marine engine room simulator
    MIWA Takashi, WU Yanbin, NAKAMURA Masumi, UCHIDA Makoto
    IMLA ICERS Committee, Nov. 2015, The 12th International Conference on Engine Room Simulators (ICERS 12 Istanbul), English
    [Refereed]
    International conference proceedings

  • Study on advantages and obstacles of applying physiological computing in ERS-based maritime training
    WU Yanbin, MIWA Takashi, UCHIDA Makoto, NAKAMURA Masumi
    IMLA ICERS Committee, Nov. 2015, The 12th International Conference on Engine Room Simulators (ICERS 12 Istanbul), English
    [Refereed]
    International conference proceedings

  • Yanbin Wu, Takashi Miwa, Kaoru Shimamoto, Makoto Uchida
    Engine-room Resource Management (ERM) is a widely used approach to achieve ship’s safe navigation by effectively managing the resources of personnel, equipment, and information in the machinery space. According to the requirements of the International Maritime Organization’s (IMO) International Convention on Standards of Training, Certification and Watchkeeping for Seafarers, maritime education organizations and universities are developing ERM training courses, by which both experienced and newly recruited seafarers are educated. The maritime industry needs to know whether the training courses are effective or not. This paper aims to propose a quantitative evaluation method of a crew team performance regarding Engine-room Resource Management. A hierarchy framework, composed of four medial elements and 12 associated elements of non-technical skills, is built to construct the evaluation criteria. Analytical Hierarchy Process (AHP) method is used to calculate the weight of each criterion, and prior research is done by survey to collect the opinions of experts on important aspects of ERM. Both local and global weights of evaluation criteria are decided. During the evaluation process, a behavioral markers system is devised to ensure that evaluators are both objective and consistent. We use the fuzzy comprehensive evaluation method to calculate the results and a final team performance score can be obtained. The results of this case study show that this method is applicable for the assessment of Engine-room Resource Management training courses.
    Springer Verlag, Oct. 2015, WMU Journal of Maritime Affairs, 14(2) (2), 333 - 347, English
    [Refereed]
    Scientific journal

  • Operator's mental workload evaluation in engine room simulator by using EEG HRV and NASA-TLX
    WU Yanbin, MIWA Takashi, NAKAMURA Masumi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Oct. 2015, Proceedings of the Conference of the Japan Institute of Marine Engineering, (85) (85), English
    Research society

  • 船舶機関安全管理に関する研究 - 繰り返し発生する警報に対する訓練生の行動の変化
    MIWA Takashi, WU Yanbin, NAKAMURA Masumi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Oct. 2015, Proceedings of the Conference of the Japan Institute of Marine Engineering, (85) (85), Japanese
    Research society

  • Study on workload measurements at the marine engineering education under the marine engine simulator environment
    MIWA Takashi, Kaoru SHIMAMOTO, WU Yanbin, NAKAMURA Masumi, UCHIDA Makoto
    For the safety navigation of the ship, also engineers have to keep the safety operation and management of the engine with good teamwork appropriately. Therefore, every engineer must exert full their own ability, and they are required to realize the minimum basic skills for the engine operation before they commence to be onboard. Then, at the maritime educational institutions, the requirement knowledge and skills as a ship engineer are given to students through lectures and exercises. In this study, in order to carry out the properly education training, authors pay attention to understand the mental state of the student. Then authors tried to measure the workload of student who operates the engine system under marine engine simulator environment. The EEG and the heart rate of trainees during the experiment were measured and analyzed. And the trainee's mental states were evaluated by comparing with n-back task experiment.
    The Royal Institution of Naval Architects, Sep. 2015, International Conference on Ship & Offshore Technology (ICSOT KOREA 2015), 65 - 69, English
    [Refereed]
    International conference proceedings

  • Physiological Computing for Maritime Ergonomics Applications
    WU Yanbin, MIWA Takashi, UCHIDA Makoto
    In safety-critical systems such as marine engine plant operation, we always hope that the operator could persistently monitor system parameters (e.g. engine revolution) and adapt to unforeseen changes (e.g. lubrication oil pressure low) and avoid any misses or incidents (e.g. engine shut down), in other words, to perform their jobs perfectly. With the improvement of hardware reliability, it is the abnormal psychophysiological state of the operator that more likely lead to performance degradation of the system. Thus it is necessary to address how to maintain the optimal operator functional state (OFS) in the context of human-machine systems, where the risk of accident is closely related to human component. Physiological computing is to correlate an operator's physiological changes and their functional states based on simple selected features or complex algorithms such as support vector machine and fuzzy modelling. The physiological evaluation indices mainly include heart rate variability (HRV) recorded from electrocardiogram (ECG), blood pressure, respiration, eye blinks and pupil diameter, skin potential, hemodynamic indices and cerebral cortex indices such as electroencephalogram (EEG) and event-related potentials (ERPs). This paper aims to review the psychophysiological indices that are widely used to predict human cognitive states in both cognitive psychology research and applied industries. Possible applications of physiological computing in maritime human factors are suggested. A marine engine power-plant simulator operation study is done to evaluate operators' mental workload based on chosen psychophysiological indices and physiological computing methods. Significance tests show that alpha band wave ratio is effective for referring subject's mental workload.
    The Royal Institution of Naval Architects, Sep. 2015, International Conference on Ship & Offshore Technology (ICSOT KOREA 2015), 45 - 49, English
    [Refereed]
    International conference proceedings

  • 海事における実習授業での反転授業の試み
    FUCHI MASAKI, FUJIMOTO SHOJI, HIRONO KOHEI, MIWA TAKASHI, MATSUSHITA TETSUO, TSUNO MEGUMI, NAKAGAWA KOUICHIROU
    反転授業の手法を用いることで、従前よりも良い実習を行うことができる可能性があることから、海事における実習授業での反転授業を試みた。
    インターネット上で検索したところ、海事にかかわる座学授業の映像教材はあったが、実習の映像教材はなかった。
    そこで本研究では直接実習授業に役立つように、実践的な映像教材の作成を行った。
    作成した映像教材を用いて神戸大学海事科学部の学内船舶実習に反転授業として試行した。
    実習終了後に質問紙調査を実施し、映像教材に対する学生の評価と利用実態を明らかにすることで、海事における実習授業での反転授業の有効性を検討した。
    今回作成した映像教材は、動機付け強化やテロップを入れるなどの改善点はあるものの、学生にとって非常に役立つものであったと評価できた。
    また学生の利用理由に応じて利用頻度、利用形態を変えており、海事における実習授業での反
    日本海洋人間学会, Aug. 2015, 海洋人間学雑誌, 4(1) (1), 37 - 40, Japanese
    [Refereed]
    Scientific journal

  • Aburagi Daiichi, Uchida Makoto, Miwa Takashi
    Kobe University, Jul. 2015, Review of Graduate School of Maritime Sciences, Kobe University, 12, 23 - 29, Japanese
    Link to Kobe Univ. Repository (Kernel)

  • Relationship Between Characteristics of Human Factors Based on Marine Accident Analysis
    Masumi Nakamura, Takashi Miwa, Makoto Uchida
    Most marine engine accidents are caused by human errors, such as misperception, misjudgment and misoperation. It is essential to comprehensively analyze human errors occurred during marine engine plant operation, and to investigate more effective measures to prevent the similar errors. The Engine-room Resource Management training has become more important for marine engineers working in a complex system. In this paper, first, characteristics of total human errors are investigated by taking 298 marine accidents records from Japan Marine Accident Inquiry. Second, the latent factors which are common factors in accident records are determined using covariance structure analysis. Moreover, the relationships between latent factors and onshore management personnel were investigated using System Dynamics. In this work, a basic model for effective education and support method which improve the marine engineers' skills is considered.
    IEEE, 2015, 2015 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL ENGINEERING AND ENGINEERING MANAGEMENT (IEEM), 886 - 891, English
    [Refereed]
    International conference proceedings

  • A Study on Training Model of Marine Engineers Based on Marine Accident Analysis
    NAKAMURA Masumi, MIWA Takashi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Nov. 2014, Proceedings of the Conference of the Japan Institute of Marine Engineering, (84) (84), 65 - 66, Japanese
    Research society

  • Study on Evaluation Methods for Education and Training in Marine Engine Plant Simulator - Mental Load and Biological Reaction -
    Kaoru SHIMAMOTO, WU Yanbin, MIWA Takashi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Nov. 2014, Proceedings of the Conference of the Japan Institute of Marine Engineering, (84) (84), 67 - 68, Japanese
    Research society

  • Study on Biological Response Measurements in Marine Engine Plant Simulator
    MIWA Takashi, Kaoru SHIMAMOTO, NAKAMURA Masumi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Nov. 2014, Proceedings of the Conference of the Japan Institute of Marine Engineering, (84) (84), 73 - 74, Japanese
    Research society

  • Study on Development of Comprehensive Evaluation Method Using Multiples Biological Response Data under the Engine Room Simulator
    MIWA Takashi, Kaoru SHIMAMOTO, WU Yanbin, NAKAMURA Masumi, UCHIDA Makoto
    Sep. 2014, Proceedings of the 10th International Symposium on Marine Engineering, 10, PID109, 1 - 4, English
    [Refereed]
    International conference proceedings

  • Comparison and Correlation between Subjective and Objective Mental Work-load Measurement
    WU Yanbin, Kaoru SHIMAMOTO, MIWA Takashi, NAKAMURA Masumi, UCHIDA Makoto
    Sep. 2014, Proceedings of the 10th International Symposium on Marine Engineering, 10, PID117, 1 - 4, English
    [Refereed]
    International conference proceedings

  • NAKAMURA Masumi, MIWA Takashi, UCHIDA Makoto
    The role of marine engine accident prevention has become more important for marine engineers working in a complex environment. Various risk factors caused by human errors result in serious accidents. However, this argument does not account for the relationship between error and accident. The purpose of this study is to introduce an integrated multi-dimensional approach to investigate errors committed by engineers. For this work, the characteristics of total human errors were investigated by taking 298 marine accident records from the Japan Marine Accident Inquiry and 104 incident records from engine trouble casebooks. Different incident records are compared by employing quantification theory III, which is one of the measurements for multivariate analysis. This research identifies actualized and latent events by using accident records and incident records without near-accidents. Furthermore, the authors present recommendations for safety guidelines required for safe engine operation by analyzing both compositions of factor and total image errors.
    The Japan Institute of Marine Engineering, Mar. 2014, Journal of the Japan Institute of Marine Engineering, 49(2) (2), 106 - 112, Japanese
    [Refereed]
    Scientific journal

  • Study on Eye Movement of Student and Skilled Engineer under the MEPS Environment
    MIWA Takashi, HISADA Shoutaro, SUZUKI Tomohiro, NAKAMURA Masumi, UCHIDA Makoto
    IMLA ICERS Committee, Oct. 2013, The 11th International Conference on Engine Room Simulators (ICERS 11 Busan), 13 - 20, English
    [Refereed]
    International conference proceedings

  • Consideration of Potential Events Concerning the Human Error in Marine Engine System
    NAKAMURA Masumi, UCHIDA Makoto, MIWA Takashi
    The Japan Institute of Marine Engineering, Sep. 2013, Proceedings of the Conference of the Japan Institute of Marine Engineering, (83) (83), 87 - 88, Japanese
    International conference proceedings

  • 実海域における推進動力システムのシミュレーションモデルについて
    OOKAWA Akina, NAGAI Shunsuke, UCHIDA Makoto, MIWA Takashi
    The Japan Institute of Marine Engineering, Sep. 2013, Proceedings of the Conference of the Japan Institute of Marine Engineering, (83) (83), 147 - 148, Japanese
    International conference proceedings

  • Study on Failure Prediction by Virtual Ship Engineer for Engine Plant Management
    ISHIKAWA Wataru, MIWA Takashi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Sep. 2013, Proceedings of the Conference of the Japan Institute of Marine Engineering, (83) (83), 89 - 90, Japanese
    Research society

  • MEPS環境下における機関士の人間反応データ計測
    HISADA Shoutaro, MIWA Takashi, SUZUKI Tomohiro, ABURAGI Daiichi, UCHIDA Makoto
    The Japan Institute of Marine Engineering, Sep. 2013, Proceedings of the Conference of the Japan Institute of Marine Engineering, (83) (83), 91 - 92, Japanese
    International conference proceedings

  • IKAWA Hiromasa, MIWA Takashi, KIMURA Ryuichi
    Main engine inspection and maintenance are important tasks carried out by the engine crew. Nevertheless, a case example where carelessness such as the failure to properly lubricate the connecting rod bolt led to insufficient bolt clamping which eventually resulted in engine damage has been reported. Since it is important that uniform standard procedures for bolt tightening be equally adopted in all ships, the authors sent out questionnaires regarding bolt tightening practices and procedures to marine engineers who work for Japanese shipping lines. The results obtained from the responses of 85 engineers showed that there are multiple views regarding bolt tightening managements, such as the type of lubricant used, the method of lubricant application, and the method of tightening for bolts in the same engine part.
    The Japan Institute of Marine Engineering, Mar. 2013, JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN, 48(2) (2), 212 - 217, Japanese

  • MIWA Takashi
    The Japan Institute of Marine Engineering, Mar. 2013, JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN, 48(2) (2), 218 - 223, Japanese

  • 三村 治夫, 三輪 誠
    The authors used the isolate, Vibrio sp., as a model strain to estimate the survivability of pathogenic V. cholerae after invasion from ballast water discharged into Tokyo Bay. The seawater samples taken from Tokyo Bay were also examined for V. cholerae contamination. All samples tested negative for V. cholerae. As for the survivability of Vibrio sp., the initial number of the
    The Japan Institute of Marine Engineering, Mar. 2013, Japan Institute of Marine Engineering (JIME), Vol. 48(No. 2) (No. 2), pp. 241 - 245, English
    [Refereed]
    Scientific journal

  • Inactivation of Seawater by CO2 bubbling
    Takashi Miwa, Haruo Mimura, Kouta Shioda
    Dec. 2012, Proceedings of 5th PAAMES and AMEC2012, 5 pages
    International conference proceedings

  • INVESTIGATION OF PATHOGENIC Vibrio cholerae IN SEAWATER COLLECTED FROM A SHIP’S ENGINE ROOM AND ESTIMATION OF ITS ABILITY TO SURVIVE AFTER DISCHARGE FROM A SHIP
    Haruo Mimura, Takashi Miwa
    Oct. 2011, Proceedings of the International Symposium on Marine Engineering (ISME) 2011, Kobe, Japan., 6 pages
    [Refereed]
    International conference proceedings

  • Miwa Takashi, Ikawa Hiromasa, Kimura Ryuichi
    A test hammer is used to detect faulty components or slack bolts during impact inspection of marine diesel engine cranks. Since a prolonged work experience is necessary to acquire this technique, technology transfer is therefore difficult. Moreover, because this technology depends on the individual senses, the inspection accuracy is prone to vary among people. The authors have developed a system that can perform the above-described inspections and execute diagnostic procedures and thereby be more useful than human acoustic sense. We constructed an algorithm that estimates the fastening force of a crank-pin bolt at a connecting-rod large-end from sound, with which diagnostic tests were conducted. However, this algorithm is for a specific bolt only and is inapplicable to bolted joints of various types. This study conducted impact experiments using test pieces with varied component size and bolt tightening torque. First, the test piece size was estimated from impact sound data using discriminant analysis. That result was subjected to multiple regression analysis, a technique of multivariate analyses, from which the bolt tightening torque was estimated. The introduction of this two-step analytical method has provided us with a new tightening torque estimation algorithm for application to various bolted joints.
    The Japan Institute of Marine Engineering, 2010, JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN, 45(1) (1), 109 - 115, Japanese

  • Protective Effect of Externally loaded Na+-stress on Thermal Death of a Marine Vibrio sp. Cell isolated from a Ship’s Ballast Water
    Haruo MIMURA, 三輪 誠
    Oct. 2009, Proceedings of 8th International Symposium on Marine Engineering (ISME) 2009, various 6 pages
    International conference proceedings

  • Changes of Marine Bacterial Populations in Seawater taken through a Seawater Pump and retained in Heat Exchangers in the Engine Room
    Takashi MIWA, Haruo MIMURA
    Oct. 2009, Proceedings of 8th International Symposium on Marine Engineering (ISME) 2009, various 6 pages
    International conference proceedings

  • Effect of Initial Biofilm formed inside an Aluminum Brass Pipe on the Fouling Factor
    Kouta Shioda, Haruo MIMURA, Kazutoshi YOSHIDA, Takashi MIWA
    日本海水学会, Jun. 2009, Bulletin of the Society of Sea Water Science, Japan, 第63巻,3号,pp. 190-194(3) (3), 190 - 194, Japanese
    [Refereed]
    Scientific journal

  • 機関室へ汲み入れた海水及び機器内に滞留した海水中の海洋細菌数の変動
    Takashi MIWA, Haruo MIMURA, Akihisa Abe, Shigeru Nishio, Minoru Takeda
    May 2009, The Japan Institution of Marine Engineering, Vol. 44, No. 3, pp. 470-476, Japanese
    [Refereed]
    Scientific journal

  • Distribution of a Fungous, Which Has an Ability to Make Mycelia in Marine Diesel Oil, in a Ship’s Fuel Supply System for Marine Diesel Engines
    Haruo MIMURA, Takashi Miwa, Masahiro YAGI
    Oct. 2008, Proceedings of 3rd PAAMES and AMEC2008, pp. 791-795, English
    International conference proceedings

  • Miwa Takashi, Ikawa Hiromasa, Kimura Ryuichi
    Safe operation of a ship engine plant is maintained using a continuous monitoring system and periodic inspection and maintenance undertaken several times daily. When monitoring and maintenance work are executed to judge the state of equipment, an operator uses data from measurement instruments and detects the operating sound of an engine and the hammering sounds from contact using a testing hammer.
    The hammering inspection using the testing hammer, which is a general check method in routine maintenance work, is used not only for marine engines but also for various machines on land. In those machines, to prevent accidents, checking before engine starting is performed routinely, but many accidents caused by loose bolts and similar malfunctions are reported.
    For this study, an experiment was performed while the fastening power of bolts in the connecting rod was variously changed. Sounds generated when bolts are hit with the testing hammer were recorded at that time. An operator heard the hammering sound. The means by which the operator judged the fastening power by the hammering sound were investigated using a questionnaire. In addition, the hammering sound was made into data, and calculation of the fastening power was assessed using statistical analysis based on the above data. Consequently, a multiple regression formula with high accuracy was obtained for particular bolts used for this experiment. Results clarified that the fastening power can be estimated from the hammering sound.
    The Japan Institute of Marine Engineering, 2008, JOURNAL OF THE MARINE ENGINEERING SOCIETY IN JAPAN, 43(3) (3), 406 - 411, Japanese

  • Makoto MIWA, Haruo Mimura
    Troubles with a marine Diesel engine can occur unexpectedly, and regardless of the quality of maintenance. It can take much time to find the cause when a marine Diesel engine stops without any clear mechanical reason.
    It has been reported that huge amounts of sludge containing mycelia were found trapped on a marine Diesel oil strainer element; this causing the engine to stop because of the reduction of fuel supplying the engine. In this study we examine the contamination and the distribution of fungi - and their mycelia - in fuel oils loaded aboard and stored on an ocean going training ship. Fungi in the marine Diesel oil were discovered localized in the hull fuel tanks and in the settling tank of the engine room; the fungi had made mycelia.
    These results indicate the importance of the management of marine Diesel oil stored in a ship's tanks in order to avoid unexpected troubles with a main engine and/or generator engines. We also examined the lubricating oil temperature at the main engine outlet, which increased 50-55°C.
    Fungi could not be detected from the sample taken from the tank-pipe lubricating system, except in the settling tank. Since the lubricating oil in the settling tank was stored for more than ten years without use, the pH value had been reduced to about 6.0, indicating the importance of keeping the lubricating oils alkaline. Also, exposure to high temperature can prevent fungous growth.
    The Japan Institute of Marine Engineering, Sep. 2007, The Japan Institution of Marine Engineering, 第42巻、5号 pp. 895-900(5) (5), 895 - 900, Japanese
    [Refereed]
    Scientific journal

  • Haruo MIMURA, 三輪 誠, 八木 正博
    The efficient management of Marine diesel oil on board stands to gain from knowing the properties of the fungi which have an ability to grow in there. A fungus, which was isolated from the sludge trapped on the element in a strainer for Marine diesel oil, was able to grow in Marine diesel oil alone as well as in the chemically defined medium (CDM), pH 5.6 - 5.8, containing 0.1% glucose, 0.1% ammonium sulfate, and 0.1% potassium dihydrogenphosphate. When the isolate was grown in low oxygen concentrations of 0.5 -1.0% (vol/vol), the growth was repressed strongly in the eutrophic growth medium. In Marine diesel oil, however, the growth repression was not observed in the same oxygen concentrations described above in comparison with that in the aerobic condition. The growth in low oxygen condition seems to be limited by the quantity of the isolate in the medium. The isolate utilized n-tridecane and n-tetradecane as carbon and energy sources in CDM when glucose was replaced by these compounds. The reduction of n-tridecane and n-tetradecane in the CDM was found to be 98.8% and 92.3%, respectively, after 40 days of aerobic incubation, indicating that the isolate can utilize n-paraffms in Marine diesel oils.
    The Japan Institute of Marine Engineering, Mar. 2007, The Japan Institution of Marine Engineering, 第42巻、2号 pp. 275-280(2) (2), 275 - 280, Japanese
    [Refereed]
    Scientific journal

  • MIWA TAKASHI, WAKABAYASHI Nobukazu, YANO YOSHIJI
    The regulation to enforce improvement of security level was executed in 2004. Ships which are obliged should take the cost for introduction of new security system. We tried to construct on-board LAN using wireless technology aboard existent ship in operation, in order to utilize ship's monitoring system. In this paper, we describe outline of implementation of on-board LAN system aboard T. S. Fukae-maru and conclusion of the radio intensity measurement of wireless LAN, also describe ship monitoring system utilizing network camera as a practical application of the LAN.
    Japan Institute of Navigation, Mar. 2006, THE JOURNAL OF JAPAN INSTITUTE OF NAVIGATION, 第114号,pp.243-250, 243 - 250, Japanese
    [Refereed]
    Scientific journal

■ MISC
  • 渡辺 祐輔, 藤浪 幸仁, 岸 武行, 福島 健史, 金星 隆之, 中村 雄史, 北原 辰巳, 中家 正史, 津田 健太郎, 加藤 収三, 江﨑 秀徳, 人見 朋子, 南 祐輔, 藤原 直人, 西川 みどり, 渡邊 和英, 森田 孝宏, 西村 佳祐, 沼野 正義, 清水 悦郎, 渡辺 学, 大地 まどか, 川原 秀夫, 三輪 誠, 前田 和幸
    The Japan Institute of Marine Engineering, 01 Jul. 2023, Marine Engineering, 58(4) (4), 492 - 493, Japanese
    Introduction scientific journal

  • Masumi Nakamura, Naoya Matsunaga, Satoshi Yamashita, Norimichi Nakane, Zen Nakata, Takashi Miwa, Makoto Uchida
    The Japan Institute of Marine Engineering, 01 Mar. 2023, Marine Engineering, 58(2) (2), 149 - 156, Japanese
    Introduction scientific journal

  • Takashi Miwa, Sara Sato, Daiichi Aburagi, Ichiro Asano
    Lead, The Japan Institute of Marine Engineering, 01 Mar. 2023, Marine Engineering, 58(2) (2), 166 - 173, Japanese
    Introduction scientific journal

  • Takashi Miwa
    The Japan Institute of Marine Engineering, 01 Mar. 2023, Marine Engineering, 58(2) (2), 136 - 136, Japanese
    Introduction scientific journal

  • シンポジウム ERMにおけるワークロード評価手法と非技術的能力評価手法の検討—特集 機関室シミュレータに関する技術開発,教育開発
    石田 達朗, 三輪 誠, 内田 誠
    日本マリンエンジニアリング学会, Mar. 2023, Marine engineering : journal of the Japan Institute of Marine Engineering = マリンエンジニアリング :日本マリンエンジニアリング学会誌, 58(2) (2), 157 - 165, Japanese

  • 渡辺 祐輔, 藤浪 幸仁, 岸 武行, 福島 健史, 川波 晃, 中村 雄史, 西上 均, 北原 辰巳, 野崎 孝彦, 江﨑 秀徳, 嵜野 陽, 津田 健太郎, 竹島 茂樹, 小山 成, 角 和芳, 吉田 肇, 森田 孝宏, 冨田 展久, 平井 一貴, 林 祐亮, 清水 悦郎, 高野 浩太朗, 北村 徹, 川原 秀夫, 三輪 誠, 前田 和幸
    The Japan Institute of Marine Engineering, 01 Jul. 2022, Marine Engineering, 57(4) (4), 466 - 466, Japanese
    Introduction scientific journal

  • 渡辺 祐輔, 藤浪 幸仁, 城田 英之, 古東 文哉, 川波 晃, 中村 雄史, 西上 均, 北原 辰巳, 野澤 和貴, 加藤 収三, 松村 直哉, 嵜野 陽, 渡邊 学, 櫻井 啓之, 岡田 紀代蔵, 吉川 朝郁, 吉田 肇, 瀧本 崇弘, 森松 光太郎, 清水 悦郎, 日比 慶久, 川原 秀夫, 三輪 誠, 前田 和幸
    The Japan Institute of Marine Engineering, 01 Jul. 2021, Marine Engineering, 56(4) (4), 563 - 563, Japanese
    Introduction scientific journal

  • 渡辺 祐輔, 松本 俊之, 城田 英之, 古東 文哉, 川波 晃, 中村 雄史, 西上 均, 北原 辰巳, 本田 恭一, 後藤 宏雅, 津田 健太郎, 江﨑 秀徳, 井上 一真, 大場 亨太, 角 和芳, 遠藤 裕彦, 吉田 肇, 三浦 信之, 西山 徹, 清水 悦郎, 南 清和, 川原 秀夫, 大出 剛, 三輪 誠, 前田 和幸
    The Japan Institute of Marine Engineering, 01 Jul. 2020, Marine Engineering, 55(4) (4), 454 - 454, Japanese
    Introduction scientific journal

  • 溝越 貴章, 松本 俊之, 城田 英之, 東田 正憲, 川波 晃, 中村 雄史, 西上 均, 北原 辰巳, 植田 和晃, 後藤 宏雅, 加藤 収三, 津田 健太郎, 渡邊 学, 田中 承允, 角 和芳, 井上 順広, 吉田 肇, 駒田 隆太郎, 光清 智洋, 清水 悦郎, 北村 徹, 永井 則安, 川原 秀夫, 大出 剛, 三輪 誠, 前田 和幸
    The Japan Institute of Marine Engineering, 01 Jul. 2019, Marine Engineering, 54(4) (4), 549 - 549, Japanese
    Introduction scientific journal

  • High-speed photography of the cavitation in small-nozzle using synchrotron X-ray
    三輪 誠, Prasetya Rubby, 笠原 巧, 宋 明良, 文 石洙, 和田 好隆, 横畑 英明
    日本液体微粒化学会, 19 Dec. 2016, 微粒化シンポジウム講演論文集, 25, 141 - 145, Japanese

  • ノズル寸法がキャビテーションに及ぼす影響とX線による可視化
    南慎一郎, PRATAMA Raditya Hendra, PRASETYA Rubby, 宋明良, 三輪誠, MOON Seoksu
    2015, 微粒化シンポジウム講演論文集, 24th

  • Application of a Halotolerant Marine Bacterium to the Degradation of the Organic Matter of Oysters
    MIMURA Haruo, SHIMOMURA Takuya, TANAKA Fumie, MIWA Takashi
    10 Sep. 2012, 防菌防黴 = Journal of antibacterial and antifungal agents, 40(9) (9), 555 - 563, Japanese

  • CO_2マイクロバブル気泡群の導入による海水の不活性化
    三輪 誠, 三村 治夫, 塩田 浩太
    25 May 2012, 日本海水学会誌 = Bulletin of the Society of Sea Water Science, Japan, 66(3) (3), 136 - 136, Japanese

  • Changes in Marine Bacterial Populations and Invaded Vibrio cholerae in Seawater taken on Board
    Haruo Mimura, Takashi Miwa
    Dec. 2009, NAVIGATION, 172号, pp. 37-46, Japanese
    [Refereed]
    Introduction scientific journal

  • Takashi MIWA, Haruo MIMURA, Kohei IDEO, Masanao DOHI, Kazutoshi YOSHIDA
    Growth of a fungus, which was isolated from the sludge at the bottom of a ship's fuel tank for Marine diesel oil, was examined. A lot of sludge had been stacked on the wire-mesh filter in the fuel strainer. In this ship, the commercially available dispersant, YUNIC #555D, was being used continuously to reduce the sludge formation in Marine diesel oil. The microscopic observation of the sludge revealed the mycelia of the fungus. The volume concentration of the dispersant in the sampled fuel oil containing sludge was estimated to be 1/300- 1/400, which was 25-67 times higher than that recommended by the company. This dispersant might have contributed to an increase in the growth of the isolate in Marine diesel oil. Hence we examined the additional effect of the dispersant on the growth of the isolate in Marine diesel oil. It was found that the isolate could grow in Marine diesel oil alone. Growth repression of the isolate, however, was observed even in the presence of 117100 of the dispersant as a final volume concentration. We examined another dispersant, SPA·LAZAE® that did not have any effect on the growth of the isolate.
    The Japan Institute of Marine Engineering, Sep. 2006, The Japan Institution of Marine Engineering, 第41巻5号 pp. 749-752(5) (5), 749 - 752, Japanese
    [Refereed]
    Introduction scientific journal

  • Arrangement and utilization of the engine repair record book
    MIWA Takashi, IDEO Kouhei, WAMAKI Yukio, KUROKI Naoyoshi, YANO Yoshiji
    Some important documents that should be submitted in the marine peril etc. are managed by the Fukae-maru engine department. The engine repair record book is one of them, and documents that only wrote down the engine trouble since 1987. It is the best material to know a present engine condition. This report is the one that the example of using the engine repair record book was shown.
    Kobe University, 31 Jul. 2006, Review of the Faculty of Maritime Sciences, Kobe University, 3, 71 - 76, Japanese

  • 練習船深江丸の台風（200416 CHABA）避泊中における走錨事例
    YANO Yoshiji, WAKABAYASHI Nobukazu, 三輪 誠
    Training ship Fukae-maru of the Faculty of Maritime Sciences, Kobe University encountered the Typhoon No.16 (200416 CHABA) at Ikeda-bay of Syodo-sima in Seto inland sea on August 30, 2004. At that time, she evaded the crisis of dragging anchor twice. And the maximum instantaneous wind speed 61 meters were observed through this violent stormy weather. Our developing "Monitor System for Anchor Riding" detected the situation of the yawing movement of a ship in detail before and after dragging anchor. Then, the anchoring data that had been recorded with this system was analyzed and reproduced. The authors are expecting that this analytical result in high accuracy will be useful as one example concerning anchor dragging phenomenon in real ship under stormy weather.
    Kobe University, Jul. 2006, REVIEW OF THE FACULTY OF MARITIME SCIENCES, KOBE UNIVERSITY, 第3号・pp.139-147, 139 - 147, Japanese
    Introduction scientific journal
    Link to Kobe Univ. Repository (Kernel)

  • 海を走る研究室－ハイテク練習船「深江丸」の研究活動－
    若林 伸和, 三輪 誠, 矢野 吉治
    海上技術安全研究所, Apr. 2006, 海技研ニュース「海と船のサイエンス」, 2006 Spring, pp.8-10, 8 - 10, Japanese
    Introduction scientific journal

  • PA-47 Growth of a fungus isolated from sludge in an A-heavy oil containing a dispersant(PHYSIOLOGY/GROWTH,Session A,(1) Poster presentations)
    Miwa Takashi, Dohi Masanao, Mimura Haruo, Ideo Kouhei, Yoshida Kazutoshi
    日本微生物生態学会, 2005, 日本微生物生態学会講演要旨集, (21) (21), 93 - 93, Japanese

■ Lectures, oral presentations, etc.
  • Study on the abnormality diagnosis with listening rod (1st Report)
    IKAWA HIROMASA, MIWA TAKASHI, DAN TOMOHISA
    第88回（平成30年）マリンエンジニアリング学術講演会, Oct. 2018, Japanese, 岡山コンベンションセンター, 船舶の機関室において，機関士は聴音棒により，ポンプ他のベアリングの異常・故障などを経験的に推測・判断している．この判断能力は船舶機関士にとって非常に重要なものであるが，経験の浅い機関士はこのような異常に遭遇する機会は極めて少ないと考えられる．そこで，筆者らは体感型シミュレータとして，模擬聴音棒を導入して上述の異常を経験出来るようなシミュレータの開発を目指している．本報では，その一環として正常時および異常時のベアリングの振動・音響を計測し，解析した結果を報告する．, Domestic conference
    Oral presentation

  • 非定常噴射過程におけるノズル内キャビテーション流れのX線高速度可視化計測
    小谷和也, Rubby Prasetya, MIWA TAKASHI, SOU AKIRA, 文 石洙, Raditya Hendra Pratama
    第26回微粒化シンポジウム2017, Dec. 2017, Japanese, 東京, Domestic conference
    Oral presentation

  • 放射光による微小ノズル内キャビテーションの高速度撮影
    MIWA Takashi, Rubby Prasetya, Kasahara Takumi, SOU AKIRA, MOON Seoksu, Wada Yoshitaka, Yokohata Hideaki
    第25回微粒化シンポジウム2016, Dec. 2016, Japanese, 日本液体微粒化学会, 富山, Domestic conference
    Oral presentation

■ Research Themes
  • 井川 博雅
    学術研究助成基金助成金／基盤研究(C), Apr. 2016 - Mar. 2019
    Competitive research funding

  • Study on the Improvement of the Engine Resource Management under Multiple Management System
    UCHIDA Makoto, MIWA Takashi, Nakamura Masumi, Hashimoto Seigo
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (C), Kobe University, 01 Apr. 2013 - 31 Mar. 2016
    In order to improve the Engine-room Resource Management (ERM), the vital reactions and mental work load of the subjects who are supposing marine engineers were examined by simulated ERM environments in an engine room simulator. It was made clear that the mental work load of subject is able to be continuously estimated from the measurements of vital reactions by carrying out an appropriate pre-experiment for reference. The numerical simulation model was proposed to make clear the relation between engineers at sea and superintendents at head office in a viewpoint of "Understanding the present situation", "Choice of solving" and "Appropriate support" by utilizing the result of a previous work. The base to evaluate the delicate balance for Engine Resource Management under multiple management system was established in this activities.

  • 井川 博雅
    学術研究助成基金助成金／基盤研究(C), Apr. 2013 - Mar. 2016
    Competitive research funding

  • Research on Maritime Education System and Seafarers Market in Asia
    ISHIDA Kenji, FURUSHO Masao, KAMAHARA Junzo, FUJIMOTO Shoji, ARITA Toshiaki
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), Kobe University, 2005 - 2007
    In research periods 1. The investigator group surveyed and researched as follows; (1) Collected and sorted market data of seafarers from governments and private sectors in Asian countries (2) Statistical survey on maritime cluster in Kobe and Osaka area through questionnaire (3) Surveyed and colleted information and materials of maritime education and training system at the international conferences or symposiums. 2. Cooperation works (1) The International Maritime Education and Research Centre of Kobe Univ. supported the research committee of Kobe Maritime Cluster conducted by the Ocean Policy Research Foundation in 2006 (2) In 2007, the research committee consisted with the investigator group, Kobe municipal and the Kobe Chamber of Commerce and Industry simulation surveyed on regeneration of maritime cluster in Kobe. 3. Lecture and presentations; (1) Two investigators presented the research results at the international conference in Australia and Ukraine in 2006 and 2007. (2) The head of investigator presented and lectured about maritime cluster at JETRO KOBE, Kobe District Transport Bureau and Kobe Association of Corporate Executives 4. Publications Above activities are summarized in the Annual Bulletin of the International Maritime Education and Research Centre in 2005,6,7.

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