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Employing electricity-consumption monitoring systems and integrative time-series analysis models： A case study in Bogor, Indonesia

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Frontiers in Energy 2018年第3期12卷 426-439页

作者： Seiya MAKI Shuichi ASHINA Minoru FUJII tsuyoshi fujita Norio YABE Kenji UCHIDA Gito GINTING Rizaldi BOER Remi CHANDRAN National Institute for Environmental Studies Tsukuba city Ibaraki 305-8506 Japan Fujitsu Company Chiba city 261-8588 Chiba Japan Bogor Agricultural University (IPB) JI Pajajaran No. 1 Bogor West Java16143 Indonesia

The Paris Agreement calls for maintaining a global temperature less than 2℃ above the pre-industrial level and pursuing efforts to limit the temperature increase even further to 1.5℃. To realize this objective and promote a low-carbon society, and because energy production and use is the largest source of global greenhouse-gas （GHG） emissions, it is important to efficiently manage energy demand and supply systems. This, in turn, requires theoretical and practical research and innovation in smart energy monitoring technologies, the identification of appropriate methods for detailed time-series analysis, and the application of these technologies at urban and national scales. Further, because developing countries contribute increasing shares of domestic energy consumption, it is important to consider the application of such innovations in these areas. Motivated by the mandates set out in global agreements on climate change and low-carbon societies, this paper focuses on the development of a smart energy monitoring system （SEMS） and its deployment in house- holds and public and commercial sectors in Bogor, Indonesia. An electricity demand prediction model is developed for each device using the Auto-Regression eXogenous model. The real-time SEMS data and time- series clustering to explore similarities in electricity consumption patterns between monitored units, such as residential, public, and commercial buildings, in Bogor is, then, used. These clusters are evaluated using peak demand and Ramadan term characteristics. The resulting energy- prediction models can be used for low-carbon planning.

关键词： electricity monitoring electricity demandprediction multiple-variable time-series modeling time-series cluster analysis Indonesia

Carbon footprint assessment for the waste management sector： A comparative analysis of China and Japan

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Frontiers in Energy 2018年第3期12卷 400-410页

作者： Lu SUN Zhaoling LI Minoru FUJII Yasuaki HIJIOKA tsuyoshi fujita Department of Environment Systems Graduate School of FrontierSciences The University of Tokyo 5-1-5 Kashiwanoha Kashiwa-shiChiba 277-8563 Japan Center for Social and Environmental Systems Research NationalInstitute for Environmental Studies (NIES) 16-20nogawa TsukubaIbaraki 305-8506 Japan Graduate School of Life and Environmental Sciences University ofTsukuba Tsukuba lbaraki 305-8506 Japan

Waste management is becoming a crucial issue in modem society owing to rapid urbanization and the increasing generation of municipal solid waste （MSW）. This paper evaluates the carbon footprint of the waste management sector to identify direct and indirect carbon emissions, waste recycling carbon emission using a hybrid life cycle assessment and input-output analysis. China and Japan was selected as case study areas to highlight the effects of different industries on waste management. The results show that the life cycle carbon footprints for waste treatment are 59.01 million tons in China and 7.01 million tons in Japan. The gap between these footprints is caused by the different waste management systems and treatment processes used in the two countries. For indirect carbon footprints, China＇s material carbon footprint and deprecia- tion carbon footprint are much higher than those of Japan, whereas the purchased electricity and heat carbon footprint in China is half that of Japan. China and Japan have similar direct energy consumption carbon footprints. However, CO2 emissions from MSW treatment processes in China （46.46 million tons） is significantly higher than that in Japan （2.72 million tons）. The corresponding effects of waste recycling on CO2 emission reductions are consider- able, up to 181.37 million tons for China and 96.76 million tons for Japan. Besides, measures were further proposed for optimizing waste management systems in the two countries. In addition, it is argued that the advanced experience that developed countries have in waste management issues can provide scientific support for waste treatment in developing countries such as China.

关键词： waste management waste recycling carbon footprint hybrid LCA

Proliferation of district heating using local energy resources through strategic building-stock management： A case study in Fukushima, Japan

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Frontiers in Energy 2018年第3期12卷 411-425页

作者： Yi DOU Keijiro OKUOKA Minoru FUJII Hiroki TANIKAWA tsuyoshi fujita Takuya TOGAWA Liang DONG Center for Social and Environmental Systems Research NationalInstitute for Environmental Studies (NIES) 16-20nogawa TsukubaIbaraki 305-8506 Japan Graduate School of Environmental Studies Nagoya University Furo-cho Chikusa-ku Nagoya 464-8601 Japan Graduate School of Environmental Studies Nagoya University Furocho Chikusa-ku Nagoya 464-8601 Japan Center for Social and Environmental Systems Research NationalInstitute for Environmental Studies (NIES) 16-20nogawa TsukubaIbaraki 305-8506 Japan Fukushima Branch National Institute for Environmental Studies (NIES)10-2 Fukasaku Miharu-machi Tamura-gun Fukushima 963-7707Japan Center for Social and Environmental Systems Research NationalInstitute for Environmental Studies (NIES) 16-2 Onogawa TsukubaIbaraki 305-8506 Japan CML Leiden University Leiden the Nether-lands

District heating systems using cogeneration technology and renewable resources are considered as an effective approach to resources conservation and reduction of greenhouse gas （GHG） emissions. However, wide- spread aging and depopulation problems, as well as the popularization of energy-saving technologies in buildings, are estimated to greatly decrease energy consumption, leading to inefficiency in district heating and barriers to technology proliferation. From a long-term perspective, land use changes, especially the progression of compact city plans, have the potential to offset the decrement in energy consumption that maintains the efficiency of district heating systems. An integrated model is developed in this paper based on building cohort analysis to evaluate the economic feasibility and environmental impact of introdu- cing district heating systems to a long-term compact city plan. As applied to a case in the Soma Region of Fukushima, Japan, potential migration from the suburbs to the central station districts is simulated, where district heating based on gas-fired cogeneration is expected to be introduced. The results indicate that guided migration to produce concentrated centers of population can substan- tially increase the heat demand density, which supports a wider application of district heating systems and better low-carbon performance. These results are further dis- cussed in relation to technology innovation and related policies. It is concluded that policies related to urban land use planning and energy management should be integrated and quantitatively evaluated over the long-term with the aim of supporting urban low-carbon sustainable develop- ment.

关键词： building stock compact city district beating energy use Fukushima

Expert networks as science-policy interlocutors in the implementation of a monitoring reporting and verification （MRV） system

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Frontiers in Energy 2018年第3期12卷 376-388页

作者： Remi CHANDRAN tsuyoshi fujita Minoru FUJII Shuichi ASHINA Kei GOMI Rizaldi BOER Muhammad ARDIANSYAH Seiya MAKI Center for Social and Environmental System Research National Institutefor Environmental Studies Tsukuba Japan Centre for Climate Risk and Opportunity Management in Southeast Asiaand Pacific (CCROM-SEAP) Bogor Agricultural University (IPB)Bogor Indonesia

The Paris Agreement, which entered into effect in 2016, emphasizes a definite timeline for communicating and maintaining successive nationally determined con- tributions （NDCs） that it plans to achieve in addressing climate change. This calls for the development of a measurement, reporting and verification （MRV） system and a Capacity-building Initiative for Transparency （CBIT）. Though such actions are universally accepted by the Parties to the Paris Agreement, earlier studies have shown that there remain technological, social, political and financial constrains which will affect the development and deployment of such a system. In this paper, using a case study on MRV implementation in Bogor City in Indonesia, how the above-mentioned challenges can be overcome is outlined through a technological and policy innovation process where scientists and technologists （collectively referred as expert networks） can join hands with local governments and national policy makers in designing, development and implementation of an MRV system that meets the local, national and global requirements. Through the case study it is further observed that expert networks can act as interactive knowledge generators and policy interlocutors in bridging technology with policy. To be specific, first, a brief history of the international context of MRV and CBIT is outlined. Next, the theoretical under- pinning of the study is contextualized within the existing theories related to public policy and international relations. Finally, the case study is outlined and investigated where the engagement of an expert-network and policy makers in the design, development and implementation of an MRV tool is showcased.

关键词： MRV CBIT UNFCCC Indonesia Japan ICT based monitoring climate policy

Cutting Characteristics of Duplex Stainless Cast Steel X2CrNiMoN25-7-3

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Journal of Mechanics Engineering and Automation 2017年第6期7卷 300-306页

作者： Masahiro Hagino Akihiro Takemura tsuyoshi fujita Hiroshi Usuki Akihiko Ikuta The Department of Integrated Science and Technology National Institute of Technology Tsuyama College Tsuyama 708-8509 Japan The Department of Mechanical Engineering National Institute of Technology Yonago College Yonago 683-8502 Japan The Department of Interdisciplinary Faeulty of Science and Engineering Shimane University Matsue 690-8504 Japan The Department of Mechanical Engineering Kindai University Higashihiroshima 739-2116 Japan

X2CrNiMoN25-7-3 duplex stainless steel is suitable for chloride-containing environments such as seawater because it has excellent pitting corrosion resistance. Duplex stainless cast steel is often used to accommodate the complexity of part geometry at joints. However, machining after casting is indispensable. This study evaluated the cutting characteristics of stainless cast steel. Adhesion of the cutting edge was weak at high cutting speeds, but tool wear was large. Diffusion and reactions between the work-pieces and the tool edge were investigated. Slight inter-diffusion and a reaction phase were observed, but the bond-ability was low.

关键词： Duplex stainless steel sintered carbide tool cermet tool mach-inability stainless cast steel adhesion

Factors associated with residual gastroesophageal reflux disease symptoms in patients receiving proton pump inhibitor maintenance therapy

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World Journal of Gastroenterology 2017年第11期23卷 2060-2067页

作者： Fumiaki Kawara tsuyoshi fujita Yoshinori Morita Atsushi Uda Atsuhiro Masuda Masaya Saito Makoto Ooi Tsukasa Ishida Yasuyuki Kondo Shiei Yoshida Tatsuya Okuno Yoshihiko Yano Masaru Yoshida Hiromu Kutsumi Takanobu Hayakumo Kazuhiko Yamashita Takeshi Hirano Midori Hirai Takeshi Azuma Division of Gastroenterology Department of Internal MedicineKobe University Graduate School of Medicine Department of Pharmacy Kobe University Hospital

AIM To elucidate the factors associated with residual gastroesophageal reflux disease(GERD) symptoms in patients receiving proton pump inhibitor(PPI) maintenance therapy in clinical *** The study included 39 GERD patients receiving maintenance PPI therapy. Residual symptoms were assessed using the Frequency Scale for Symptoms of GERD(FSSG) questionnaire and the Gastrointestinal Symptom Rating Scale(GSRS). The relationships between the FSSG score and patient background factors, including the CYP2C19 genotype, were *** The FSSG scores ranged from 1 to 28 points(median score: 7.5 points), and 19 patients(48.7%) had a score of 8 points or more. The patients' GSRS scores were significantly correlated with their FSSG scores(correlation coefficient = 0.47, P < 0.005). In erosive esophagitis patients, the FSSG scores of the CYP2C19 rapid metabolizers(RMs) were significantly higher than the scores of the poor metabolizers and intermediate metabolizers(total scores: 16.7 ± 8.6 vs 7.8 ± 5.4, P < 0.05; acid reflux-related symptom scores: 12 ± 1.9 vs 2.5 ± 0.8, P < 0.005). In contrast, the FSSG scores of the CYP2C19 RMs in the non-erosive reflux disease patients were significantly lower than those of the other patients(total scores: 5.5 ± 1.0 vs 11.8 ± 6.3, P < 0.05; dysmotility symptom-related scores: 1.0 ± 0.4 vs 6.0 ± 0.8, P < 0.01). CONCLUSION Approximately half of the GERD patients receiving maintenance PPI therapy had residual symptoms associated with a lower quality of life, and the CYP2C19 genotype appeared to be associated with these residual symptoms.

关键词： Gastroesophageal reflux disease CYP2C19 FSSG Residual symptoms Proton pump inhibitor

Benefits of international trauma rotation in South Africa:comparison with a trauma center in Tokyo

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Emergency and Critical Care Medicine 2022年第4期2卷 179-180页

作者： tsuyoshi Nagao Shinji Nakahara Takashi fujita Tetsuya Sakamoto Elmin Steyn Department of Emergency Medicine Teikyo University School of MedicineTokyoJapan Graduate School of Health Innovation Kanagawa University of Human ServicesKawasakiJapan Department of surgery Stellenbosch University and Tygerberg HospitalCape TownSouth Africa.

International rotations have been an option for young surgeons who face difficulties in obtaining sufficient trauma training in their own coun*** of the authors attended training in trauma surgery in South Africa for 6 months,where there are many trauma caseloads,and could experience the number of emergency operations equivalent to approximately 5 years in *** rotation allows trainees to expose clinical practices intensively and to learn principles and theories of care under experienced academic *** the other hand,they could contribute to the host hospital as part of the workforce and by assisting young surgical *** development of a more systematic and formalized framework for staff exchange between developed and developing countries will provide mutual benefits to both sides.

关键词： Low-and middle-income countries On-the-job training Trauma surgery

Electrochemical recycling of Pd and Ag from simulated high-level liquid waste

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Transactions of Nonferrous Metals Society of China 2022年第3期32卷 1031-1040页

作者： You-bin WANG Rui ZOU Yue-zhou WEI tsuyoshi ARAI Toyohisa fujita School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials Guangxi UniversityNanning 530004China Department of Material Science and Engineering Shibaura Institute of TechnologyTokyo 3-9-14Japan

For the recycling of Pd and Ag from high-level liquid waste(HLLW), the electrochemical behaviors of Pd and Ag in the simulated HNO_(3) solutions were investigated by cyclic voltammetry and potentiostatic *** electron microscopy(SEM) and X-ray diffraction(XRD) were used to-observe the deposits morphology and to evaluate their composition. The results indicate that the formation of NO_(2)^(-)electrodeposited. When Pd and Ag are electrodeposited together, more metals are gained in the same time, and the deposited Ag does not dissolve in this situation. The metals are electrodeposited completely at the potentials from -0.4 to -0.6 V(vs MSE) and the deposits contai-n Ag and PdHx. The electrodeposition of Pd can boost h-ydrogen evolution,and then the reaction between H;and NO_(2)^(-)is sped up, thereby lowering the concentration of NO_(2)^(-)and inhibiting the dissolution of Ag.

关键词： electrodeposition metals recovery nitrite generation promoting effect morphology characteristics

Different natural courses of chronic hepatitis B with genotypes B and C after the fourth decade of life

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World Journal of Gastroenterology 2007年第34期13卷 4560-4565页

作者： Tatsuji Maeshiro Shingo Arakaki Takako Watanabe Hajime Aoyama Joji Shiroma tsuyoshi Yamashiro Tetsuo Hirata Akira Hokama Fukunori Kinjo Tomofumi Nakayoshi Tomokuni Nakayoshi Masashi Mizokami Jiro fujita Hiroshi Sakugawa Control and Prevention of Infectious Disease (First Department of Internal Medicine) Department of Medicine and Therapeutics Faculty of Medicine University of the Ryukyus Okinawa Japan Department of Blood transfusion medicine Ryukyu University Hospital Okinawa Japan Department of Endoscopy Ryukyu University Hospital Okinawa Japan Department of Internal Medicine Tomishiro Central Hospital Okinawa Japan Department of Internal Medicine Heart Life Hospital Okinawa Japan Clinical Molecular Informative Medicine Nagoya City University Graduate School of Medical Science Nagoya Japan

MIM： To investigate the different impact of genotypes E and C on the development of liver cirrhosis （LC） among different age groups of patients with chronic hepatitis （CH-B）.METHODS： We examined the outcome of 121 patients with CH-B, divided by age and genotype. Univariate analyses were used to compare different groups. The Cox proportional hazard model was employed to evaluate factors affecting the development of LC.RESULTS： In patients 〈 30 years old, there were no significant predictors for development of LC. However, in patients ≥ 30 years old, genotype C was the only significant predictor. In the genotype C group, 8 of 12 patients who progressed to LC were 30-49 years old at initial diagnosis of chronic hepatitis （7 patients were positive for HBeAg）. In the genotype B group, 4 of 8 patients who developed LC were ≥50 years old at initial diagnosis and were HBeAg-negative.CONCLUSION： The rate of development of LC was comparable in patients infected with genotypes B and C when CH-B occurred at 〈 30 years old. However, CH-B patients infected with genotype C showed poor prognosis if they were 30-49 years old and were positive for HBeAg. Age-specific natural course of CH-B should be considered when patients with CH-B are treated with antiviral drugs.

关键词： Hepatitis B, chronic Hepatitis B virus Hepatitis B e antigen Genotypes Molecular epidemiology