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Modeling of Gas Governor System with Venturi
Kunio Okada,Tomoaki Takeuti,Chongo Youn,Toshiharu Kagawa 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The AFV is often used as gas governor to control pressure in gas pipeline. The AFV has a pilot line to control the downstream pressure. The pilot line consists of pilot valve and restrictor. An orifice or venturi is used for the restrictor. However, the modeling of pilot line with venturi is not studied yet. In this paper, we investigate the characteristics of the pilot line with venturi, and propose the modeling of pilot line. The characteristics of venturi and pilot valve are examined by using the pneumatic system. The effectiveness of the proposed modeling was confirmed by experiment.
Tomoaki Higuchi,Takashi Nakanishi,Kunio Takada,Mitsuyo Matsumoto,Makoto Okada,Hideyuki Horikoshi,Kimihiro Suzuki 대한의학회 2010 Journal of Korean medical science Vol.25 No.9
This report presents the case of a patient demonstrating multicentric Castleman’s disease (MCD) with a lung lesion that was successfully treated with an anti-interleukin-6 receptor antibody, tocilizumab in combination with corticosteroid and tacrolimus. A 43-yr-old female with abnormal shadows on a chest X-ray was referred to the hospital for further examination. She was diagnosed as having MCD based on the characteristic pathology of inguinal lymph node, lung lesions, laboratory data, and undifferentiated arthritis. Corticosteroid and rituximab therapy did not fully ameliorate the symptoms; thus, the therapeutic regimen was changed to include tocilizumab, oral corticosteroid and tacrolimus. This regimen resulted in clinical remission and the dose of tocilizumab and corticosteroid could be tapered. Tocilizumab in combination with corticosteroid and tacrolimus may therefore be a beneficial treatment regimen for lung lesions associated with MCD.
Mechanochemical Synthesis of Zinc Ferrite, ZnFe2O4
Sawada Yutaka,Iizumi Kiyokata,Kuramochi Tomokazu,Wang Mei-Han,Sun Li-Xian,Okada Shigeru,Kudou Kunio,Shishido Toetsu,Matsushita Jun-Ichi 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Mechanochemical synthesis of zinc ferrite, ZnFe2O4, was attempted from a powder mixture of iron (III) oxide, alpha-Fe2O3 and zinc (II) oxide, ZnO. Nanocrystalline zinc ferrite, ZnFe2O4 powders were successfully synthesized only bymilling for 30 hours. Evidence of the ZnFe2O4 formation was absent for the powders milled for 10 and 20 hours; the milling lowered the crystallinity of the starting materials. Heating after milling enhanced the formation of ZnFe2O4, crystal growth of ZnFe2O4 and the unreacted starting materials. The unreacted starting materials decreased their amounts by heating at higher temperatures.
Yano Yuichiro,Kanegae Hiroshi,Node Koichi,Mizuno Atsushi,Nishiyama Akira,Rakugi Hiromi,Itoh Hiroshi,Kitaoka Kaori,Kashihara Naoki,Ikeno Fumiaki,Tsuji Ichiro,Okada Kunio 한국역학회 2022 Epidemiology and Health Vol.44 No.-
OBJECTIVES: Using a dataset from a survey on national health and productivity management, we identified health and productivity factors associated with organizational profitability. METHODS: The Ministry of Economy, Trade and Industry conducted an annual survey on Health and Productivity Management between 2014 and 2021. We assessed the associations of organizational health and productivity management using survey questions collected in 2017 and 2018, and the rate of change in profits from 2017 and 2018 to 2020. We identified factors associated with organizational profitability using eXtreme Gradient Boosting, and calculated SHapley Additive exPlanation (SHAP) values for each factor. RESULTS: Among 1,593 companies (n= 4,359,834 employees), the mean age for employees at baseline was 40.3 years and the proportion of women was 25.8%. The confusion matrix for evaluating model performance had accuracy of 0.997, precision of 0.993, recall of 0.997; and area under the precision-recall curve of 0.999. The most important factors related to an increase in corporate profits were the percentage of current smokers (SHAP value 0.121), per-employee cost for health services (0.084) and medical services (0.050); the percentage of full-time employees working in sales departments (0.074), distribution or customer service departments (0.054); the percentage of employees who sleep well (0.055); and the percentage of employees who have a habit of regular exercise within a company (0.043). CONCLUSIONS: The lifestyle health risk factors of employees and organizations’ management systems were associated with organizational profitability. Lifestyle medicine professionals may demonstrate a significant return on investment by creating a healthier and more productive workforce.