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Droplet morphology analysis of drop-on-demand inkjet printing

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China Foundry 2024年第1期21卷 20-28页

作者： Hu-xiang Xia Takechi kensuke Tajima Shin Kawamura Yoshiumi Qing-yan Xu Key Laboratory for Advanced Materials Processing Technology(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Toyota Central R&D Labs. Inc.41-1 Yokomichi NagakuteAichi 480-1192Japan Frontier Research Center Toyota Motor Corporation1 Toyota-ChoToyotaAichi 471-8572Japan

As an accurate 2D/3D fabrication tool,inkjet printing technology has great potential in preparation of micro electronic *** morphology of droplets produced by the inkjet printer has a great impact on the accuracy of *** this study,the drop-on-demand(DoD)inkjet simulation model was established,and the accuracy of the simulation model was verified by corresponding *** simulation result shows that the velocity of the droplet front and tail,as well as the time to disconnect from the nozzle is mainly affected by density(ρ),viscosity(μ)and surface tension(σ)of *** the liquid filament is about to disconnect from the nozzle,the filament length and filament front velocity are found to have a linear correlation withσ/ρμand ln(ρ/(μσ1/2)).

关键词： microdevice fabrication inkjet printing droplet morphology modeling and simulation

An interactive approach to investigate brightness perception of daylighting in Immersive Virtual Environments:Comparing subjective responses and quantitative metrics

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Building Simulation 2022年第1期15卷 41-68页

作者： Muhammad Hegazy kensuke Yasufuku Hirokazu Abe Graduate School of Engineering Osaka UniversityYamadaoka 2-1 Suita Osaka567-0047Japan Cybermedia Center Osaka UniversityJapan

Daylighting plays an eminent role in the performance of indoor environments and their occupants,thus necessitating the need to investigate daylight perception of potential occupants at early design *** present study introduces an interactive approach to collect and visualize brightness perception of daylighting in a large-scale immersive virtual environment using a game engine as a daylight simulation *** developed system allows users to explore building models freely at different day times set in virtual reality and report their perceptions in real *** a validation study(N=36)to investigate the consistency of brightness perceptions in a real environment and its virtual replica,a set of 24 participants were recruited to use the system to report their brightness perception in a virtual model of a daylit art museum,through snapshotting the scenes where they perceive as one of the following in terms of daylighting:(very dark,dark,bright,or very bright).Using an output of 419 snapshots,a"Perceptual Light Map"(PLM)was developed to visualize the collective brightness perception of participants as a heat *** responses were found to be positively correlated with four daylight metrics,with the highest correlation to mean luminance and the lowest to luminance *** findings of this exploratory study represent a step towards a user-oriented supplement tool to the existing quantitative daylight metrics,validating game engines’adequacy as a daylight simulation tool,and illustrating the potentials of immersion and interaction principles for the perception of daylit spaces in virtual reality.

关键词： immersive virtual environment daylighting game engine human perception mean luminance

Analysis for Effects of Temperature Rise of PV Modules upon Driving Distance of Vehicle Integrated Photovoltaic Electric Vehicles

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Energy and Power Engineering 2024年第4期16卷 131-150页

作者： Masafumi Yamaguchi Yasuyuki Ota Taizo Masuda Christian Thiel Anastasios Tsakalidis Arnulf Jaeger-Waldau Kenji Araki kensuke Nishioka Tatsuya Takamoto Takashi Nakado Kazumi Yamada Tsutomu Tanimoto Yosuke Tomita Yusuke Zushi Kenichi Okumura Takashi Mabuchi Akinori Satou Kyotaro Nakamura Ryo Ozaki Nobuaki Kojima Yoshio Ohshita Toyota Technological Institute Nagoya Japan Faculty of Engineering Miyazaki University Miyazaki Japan Toyota Motor Corporation Susono Japan European Commission— Joint Research Centre Ispra Italy Sharp Corporation Nara Japan Toyota Motor Corporation Toyota Japan Nissan Motor Corporation Yokosuka Japan

The development of vehicle integrated photovoltaics-powered electric vehicles (VIPV-EV) significantly reduces CO2 emissions from the transport sector to realize a decarbonized society. Although long-distance driving of VIPV-EV without electricity charging is expected in sunny regions, driving distance of VIPV-EV is affected by climate conditions such as solar irradiation and temperature rise of PV modules. In this paper, detailed analytical results for effects of climate conditions such as solar irradiation and temperature rise of PV modules upon driving distance of the VIPV-EV were presented by using test data for Toyota Prius and Nissan Van demonstration cars installed with high-efficiency InGaP/GaAs/InGaAs 3-junction solar cell modules with a module efficiency of more than 30%. The temperature rise of some PV modules studied in this study was shown to be expressed by some coefficients related to solar irradiation, wind speed and radiative cooling. The potential of VIPV-EV to be deployed in 10 major cities was also analyzed. Although sunshine cities such as Phoenix show the high reduction ratio of driving range with 17% due to temperature rise of VIPV modules, populous cities such as Tokyo show low reduction ratio of 9%. It was also shown in this paper that the difference between the driving distance of VIPV-EV driving in the morning and the afternoon is due to PV modules’ radiative cooling. In addition, the importance of heat dissipation of PV modules and the development of high-efficiency PV modules with better temperature coefficients was suggested in order to expand driving range of VIPV-EV. The effects of air-conditioner usage and partial shading in addition to the effects of temperature rise of VIPV modules were suggested as the other power losses of VIPV-EV.

关键词： Vehicle Integrated Photovoltaics (VIPV) VIPV-Powered Electric Vehicles Driving Distance PV Modules Solar Irradiation Temperature Rise Radiative Cooling

The impact of associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)on liver tumors with unusual indications

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Hepatobiliary Surgery and Nutrition 2022年第3期11卷 477-480页

作者： kensuke Yamamura Toru Beppu Tatsunori Miyata Shinichi Akahoshi Takatoshi Ishiko Department of Surgery Yamaga City Medical CenterYamagaJapan Department of Gastroenterological Surgery Graduate School of Life SciencesKumamoto UniversityKumamotoJapan

An associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)has been developed as a novel surgical technique for patients with insufficient future liver remnant volume even after portal vein embolization(PVE)±hepatic arterial or venous embolization or conventional two-stage hepatectomy(TSH)(1-5).ALPPS was thought to be a breakthrough but high-risk procedure;however,it recently became a safer technique after the developing phase(1-3).Conversion surgery is strongly recommended for patients with initially unresectable liver tumors that are deemed resectable by systemic chemotherapy or hepatic arterial chemotherapy/embolization(6,7).The primarily targeted diseases are colorectal liver metastases(CRLM)and hepatocellular carcinoma(HCC).ALPPS is indicated for patients undergoing not only primary surgery but also conversion surgery.

关键词： ALPPS chemotherapy hepatectomy

Development of natural treatment system consisting of black soil and Kentucky bluegrass for the post-treatment of anaerobically digested strong wastewater

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Journal of Environmental Sciences 2016年第3期28卷 44-50页

作者： Xiaochen Chen kensuke Fukushi Department of Urban Engineering The University of Tokyo Integrated Research System for Sustainability Science The University of Tokyo

To develop a sound post-treatment process for anaerobically-digested strong wastewater,a novel natural treatment system comprising two units is put *** first unit,a trickling filter,provides for further reduction of biochemical oxygen demand and adjustable *** subsequent soil–plant unit aims at removing and recovering the nutrients nitrogen（N）,phosphorus（P）and potassium（K）.As a lab-scale feasibility study,a soil column test was conducted,in which black soil and valuable Kentucky bluegrass were integrated to treat artificial nutrient-enriched *** a long-term operation,the nitrification function was well established in the top layers,despite the need for an improved denitrification process prior to discharge.P and K were retained by the soil through distinct *** they either partially or totally remained in plant-available forms in the soil,indirect nutrient reuse could be *** for Kentucky bluegrass,it displayed better growth status when receiving wastewater,with direct recovery of 8%,6% and 14% of input N,P and K,***,the indispensable role of Kentucky bluegrass for better treatment performance was proved,as it enhanced the cell-specific nitrification potential of the soil nitrifying microorganisms inhabiting the *** further upgrade,the proposed system is expected to become a new solution for strong wastewater pollution.

关键词： Natural treatment system Black soil Kentucky bluegrass Strong wastewater Soil column test

Synergistic Integration of Detailed Meteorological and Community Information for Evacuation from Weather-Related Disasters: Proposal of a ‘‘Disaster Response Switch’’

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International Journal of Disaster Risk Science 2020年第6期11卷 762-775页

作者： kensuke Takenouchi Katsuya Yamori Disaster Prevention Research Institute Kyoto UniversityUji Kyoto 606-0011Japan

Meteorological information used for disaster prevention has developed rapidly in terms of both type and *** latest forecasting models can predict weather with very high resolutions that can characterize disaster risk at the local ***,this development can lead to an overdependency on the information and a wait-and-see attitude by the *** the same time,residents share and use various types of information for disaster response,such as local conditions,in addition to official disaster *** research in Japan verified the practicality and efficiency of synergistically integrating these types of information by examining actual evacuation *** current numerical forecasting models sufficiently identify locality from the viewpoint of various administrative scales such as prefectures,municipalities,and school districts,but the improvements to these models have failed to improve residents’judgment in successful evacuation *** therefore analyzed the relationship between meteorological information and residents’disaster response and confirmed that they were strongly correlated and were contributing factors in preventing *** revealed differences between a community’s disaster prevention culture and the disaster information *** led us to propose a new concept in community disaster prevention that we call the‘‘disaster response switch,’’which can serve as a data-driven risk management tool for communities when used in combination with advanced meteorological disaster information.

关键词： Community disaster prevention Disaster response High-resolution forecasting model Japan Meteorological information Risk communication

A novel comprehensive ALPPS preoperative risk assessment (CAPRA) score is beneficial in creating a treatment strategy for advanced liver malignancy

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Hepatobiliary Surgery and Nutrition 2023年第2期12卷 287-290页

作者： kensuke Yamamura Toru Beppu Tatsunori Miyata Hirohisa Okabe Katsunori Imai Takatoshi Ishiko Department of Surgery Yamaga City Medical CenterYamagaJapan Department of Gastroenterological Surgery Graduate School of Life SciencesKumamoto UniversityKumamotoJapan

Curability and safety are essential for patients with advanced liver malignancy undergoing extended liver *** the future liver remnant(FLR)volume is insufficient,portal embolization with or without hepatic arterial or venous embolization or a conventional two-stage hepatectomy(TSH)can be performed(1,2).Associating liver partition and portal vein ligation for staged hepatectomy(ALPPS)was introduced in 2007.

关键词： Associating liver partition and portal vein ligation for staged hepatectomy(ALPPS) comprehensive ALPPS preoperative risk assessment(CAPRA)score mortality

Fluid sample injectors for x-ray free electron laser at SACLA

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High Power Laser Science and Engineering 2017年第2期5卷 1-7页

作者： kensuke Tono Japan Synchrotron Radiation Research Institute 1-1-1 Kouto Sayo flyogo 679-5198 Japan RIKEN SPring-8 Center 1-1-1 Kouto Sayo Hyogo 679-5148 Japan

This paper provides a review on sample injectors which are provided at SPring-8 Angstrom Compact free electron LAser(SACLA) for conducting serial measurement in a ‘diffract-before-destroy' scheme using an x-ray free electron laser(XFEL). Versatile experimental platforms at SACLA are able to accept various types of injectors, among which liquidjet, droplet and viscous carrier injectors are frequently utilized. These injectors produce different forms of fluid targets such as a liquid filament with a diameter in the order of micrometer, micro-droplet synchronized to XFEL pulses, and slowly flowing column of highly viscous fluid with a rate below 1 μL min-1. Characteristics and applications of the injectors are described.

关键词： SACLA 样品注射者连续剧 femtosecond 晶体学 X 光免费电子激光

Comparative assessment of primary and secondary infection risks in a norovirus outbreak using a household model simulation

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Journal of Environmental Sciences 2016年第12期28卷 13-20页

作者： Fuminari Miura Toru Watanabe Kozo Watanabe Kazuhiko Takemoto kensuke Fukushi Department of Urban Engineering Graduate School of Engineering the University of Tokyo Department of Food Life and Environmental Sciences Faculty of Agriculture Yamagata University Department of Civil and Environmental Engineering Ehime University Institute for the Advanced Study of Sustainability the United Nations University Todai Institutes for Advanced Study(TODIAS) Integrated Research System for Sustainability Science(IR3S) The University of Tokyo

Diarrheal diseases can be transmitted via both primary infection due to exposures to contaminated materials from the environment and secondary infection due to person- to-person contacts. Usually, the importance of secondary infection is empirically assessed by fitting mathematical models to the epidemic curves. However, these empirical models may not be applicable to other epidemic cases because they are developed only for the target epidemics and they don＇t consider the detail routes of infection. In our previous study, we developed a theoretical model taking into account the various routes of infection that commonly occur in households （e.g., shaking hands, food handling, and changing diapers）. This model was made flexible and applicable to any epidemics by means of adjusting model parameters. In this study, we proposed a new index ＂Vulnerability indicator to secondary infection （VISI）＂, which expressed a ratio of secondary infection to primary infection risks and calculated this index in a simulated norouirus （NOV） epidemic that involved I0,000 households. The results demonstrated that households composed of more than three members including infant（s） had much higher levels of VlSl （5-45） than two-member-households with VlSI （0.1-4）. These results concluded that the infants were likely to be a hub of secondary infections in highly dense families and therefore careful handling of diapers was deemed indispensible in such families to effectively control the secondary infections.

关键词： Norovirus Quantitative microbial riskassessment Secondary infection