著者

中村 健一

出版者

社団法人 繊維学会

雑誌

繊維学会誌 (ISSN:00379875)

巻号頁・発行日

vol.61, no.6, pp.P_152-P_156, 2005 (Released:2006-02-17)

著者

中村 健一 近江 明 鈴木 誠一 小沼 正哉 栗原 忠雄 田寺 守 柴田 茂男

出版者

社団法人 日本産業衛生学会

雑誌

産業医学 (ISSN:00471879)

巻号頁・発行日

vol.26, no.4, pp.303-314, 1984 (Released:2009-03-26)

参考文献数

21

被引用文献数

1 1 1

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Mortality among employees of selected enterprises in which excellent health care programmes are carried on, was observed to evaluate employees' health levels and to establish objectives for future health care programmes. Also, these data were compared with those for all Japanese and for Japanese employees belonging to the corresponding occupational groups.Seventy-three enterprises which continuously participated in the mortality survey implemented by the Japan Research Organization of Industrial Health Care for the period between 1976 and 1980, were subjected to this study. The observed employees amounted to 3, 502, 580 person-years. Sex and age distributions of the employees were available for 47 enterprises and the observed employees totalled 2, 598, 672 person-years.The main results are as follows:1) Mortality rate (per 100, 000) is stable between 140 and 150 throughout the observed period and the average value is 145.0. The average mortality rate for males, aged 40 to 54, is 272.6.2) Malignant neoplasms were the main cause of death and account for 37-38%. In second place and below are heart diseases, cerebrovascular diseases, accidents, suicide and liver cirrhosis. Malignant neoplasms, especially of the stomach, lung and pancreas, show a trend to increase, and cerebrovascular diseases and liver cirrhosis show a trend to decrease. Among heart diseases, isch-emic heart disease accounts for about 40% and shows no marked fluctuation. Among cerebrovascular diseases, the relative frequency of subarachnoid hemorrhage is increasing.3) Comparing the mortality rates for males aged 40 to 54 by industry, “Iron, steel & nonferrous metal manufacturing” and “Electricity and gas supply” show significantly higher values, and “Finance & insurance” and “Communications” show significantly lower values than the total.4) The distribution of main causes of death for males, aged 40 to 54, was compared by major occupational groups using Proportional Mortality Ratio (PMR). A significantly high frequency of malignant neoplasms (especially of the stomach) is observed for “Professional & technical workers, managers and officials” and that of suicide for “ Craftmen, production process workers and labourers” and that of cerebrovascular diseases (especially cerebral hemorrhage) for “Protective service workers.”5) Standardized Mortality Ratio (SMR) for males, aged 20 to 54, from all causes of death, calculated on the basis of all Japanese males in 1978 is 0.57. SMR for this population from malignant neoplasms is 0.89. SMR for the same population from all causes of death, calculated on the basis of Japanese male employees in occupational groups corresponding to the studied population in 1975, is 0.75, and that from malignant neoplasms exceeds 1.00.Consistent with previous reports, mortality rates in this occupational population are significantly lower than those for the total population and the so-called “healthy workers effect” is demonstrated. Moreover, very low mortality rates from tuberculosis and cerebrovascular diseases suggest the effectiveness of disease control programmes which are implemented continuously and throughly in these enterprises. Efficient control programmes against malignant neoplasms remain to be established even in these well-cared populations.

著者

日野 幹雄 グェン ソンフン 中村 健一 東江 隆夫

出版者

公益社団法人 土木学会

雑誌

海岸工学講演会論文集 (ISSN:02857308)

巻号頁・発行日

no.27, pp.414-418, 1980

被引用文献数

1

著者

日野 幹雄 グェン・ソン・フン 中村 健一

出版者

泌尿器科紀要刊行会

雑誌

流れの可視化 (ISSN:02873605)

巻号頁・発行日

vol.1, no.2, pp.203-206, 1981

被引用文献数

3

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Lithting with stroboscopes are used for the hydrogen bubble technique to determine the instantaneous velocity field of the two-layered flow. The stroboscopes light simultanously, at constant frequency, 2 or 3 times while the camera shutter is opened. Such, 2 or 3 images of the same moving time lines of hydrogen bubbles are taken on each photograph. During the measurement of the velocities the interfacial waves of the flow are visualized with fluorescin dye. This method is recognized to be useful to detemine the relation between the spatial distribution of the velocities and their turbulent fluctuations and the interfacial waves of the two-layered flow.

著者

宮下 千枝子 澁澤 直恵 西澤 敦彦 中村 健一 奈良 雅代

出版者

東京都農林水産振興財団東京都農林総合研究センター

雑誌

東京都農林総合研究センター研究報告 (ISSN:18811744)

巻号頁・発行日

no.9, pp.23-30, 2014-03

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近年のスギ花粉症患者急増への対策として,東京都は2006年から花粉症発生源対策事業を実施し,スギ林を伐採した後に花粉症対策品種を植栽することにより花粉飛散量の低減化を図っている。花粉症対策品種には,着花量の少ない少花粉スギや,花粉を生産しない雄性不稔(無花粉)スギなどがある。少花粉スギは多摩地域の環境に適した品種がすでに開発され,花粉症発生源対策事業により普及が進んでいる。一方,雄性不稔スギはまだ研究段階にあったが,将来的に花粉飛散量を減少させる効果の高い品種の一つとして有用と考えられた。そこで,東京都農林総合研究センターでは,多摩地域に適する雄性不稔スギの開発を目的として,2007年に交配育種を開始した。

著者

中村 健一 高田 勗 鈴木 永子 杉浦 由美子 小林 てるみ

出版者

The Japanese Society for Hygiene

雑誌

日本衛生学雑誌 (ISSN:00215082)

巻号頁・発行日

vol.35, no.6, pp.851-857, 1981-02-28 (Released:2009-02-17)

参考文献数

19

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An experiment using rats was carried out to evaluate the effects of calcium deficiency on the interaction of cadmium (Cd) and zinc (Zn) in vivo.Eighty-four female rats were divided into two groups. One group was fed a calcium-sufficient diet (normal Ca group), and a second group was fed a calcium-deficient diet (low Ca group). These two groups were divided into 4 subgroups. The diet of subgroup I was supplemented with 50μg/g of Cd, that of subgroup II with 50μg/g of Zn, and that of subgroup III with 50μg/g of Cd and Zn, Subgroup IV served as the control group.After 5 months on this regimen, the rats were killed and metal levels in the liver, the right kidney, the blood and the femur were analyzed. The left kidneys were examined histopathologically.The results were as follows:1) Growth retardation was observed in the low Ca group especially in subgroups I and III.2) Whereas renal Cd concentrations in subgroup I were higher than those in subgroup III for the normal Ca group, the reverse was found in the low Ca group. Similar findings were also observed in the cases of renal Zn and Cu.3) Zn in the liver increased with the administration of Cd in the low Ca group. Zn levels in the blood of the low Ca group were higher than those in the normal Ca group.4) Ca in the femur decreased with the administration of Cd in the normal Ca group. For the low Ca group, Ca concentrations in each subgroup were lower than those of each corresponding subgroup of the normal Ca group. Ca/P ratios of the low Ca group and of the metal administered subgroups in the normal Ca group were lower than those of subgroup IV in the normal Ca group.5) No significant histopathologic changes in the kidney were found in the normal Ca group but slight changes were observed in some animals of the low Ca group regardless of which metal was administered.From these results, the interaction of Cd and Zn on renal accumulations of Cd has been shown to be disturbed by a Ca deficient condition.

著者

山本 野人 中村 健一

出版者

電気通信大学

雑誌

基盤研究(C)

巻号頁・発行日

2005

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本研究では、力学系の研究のための精度保証ツールを開発するため、☆既存の精度保証の技法を再点検してさまざまなテクニックを取り込むこと☆手法の統合や計算効率向上のための新しい理論・技術をつくり出すことを目指し、以下のような研究開発を行った。常微分方程式初期値問題の精度保証法としては、Taylor展開とその打ち切り誤差の評価に基づく方法(Lohner法・TM法など)が主流となっている。これらは時間分割点の上での関数値の包み込みに主眼をおき、時間ステップの進行に伴う特殊な累積誤差(Wrapping Effect)の軽減のために様々な技法が展開されている。これに対し、偏微分方程式の精度保証法である中尾理論を用いても常微分方程式の精度保証を行うことができる。そこで、1)初期値問題に対しstepwiseに中尾理論を適用した場合のWrapping Effectの軽減法2)初期値問題に対し考えている時間範囲の全体に中尾理論を適用した場合に現れる大きなシステムの取扱い3)初期値問題の解の最終時刻における値を包み込むため、境界値問題に対する中尾理論を利用した方法について研究を行い、これらについて3つの海外での国際研究集会をはじめとする複数の国際学会、およびいくつかの国内の研究集会で発表した。研究業績リストには主なもののみを記す。

著者

中村 健一

出版者

小樽商科大学

雑誌

商学討究 (ISSN:04748638)

巻号頁・発行日

vol.43, no.3/4, pp.369-385, 1993-03-15