文献一覧: 岩井敏 (著者)

1 0 0 0 OA 連載講座「放射線防護に用いる線量概念について」

著者: 岩井敏
出版者: Japan Health Physics Society
雑誌: 保健物理 (ISSN:03676110)
巻号頁・発行日: vol.43, no.3, pp.211-225, 2008 (Released:2010-08-05)
参考文献数: 40

In the field of radiation protection, quality factor Q (L) and radiation weighting factor wR are important coefficients for estimating both radiation protection and operational quantities to the mixed types of radiation exposure. However, some inconsistencies might be found between Q (L) and wR for estimating effective dose, for example. Some inconsistencies are attributed to incomplete definition of terms Q (L) and wR. This report presents the root and evolution of quality factor Q (L) and radiation weighting factor wR for the years 1931-2007, to clarify the current issues of inconsistencies to be solved.

2021-06-11 16:57:00
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1 0 0 0 OA 幾何学的力学系理論の応用と展開

著者: 岩井敏洋
出版者: 京都大学
雑誌: 基盤研究(C)
巻号頁・発行日: 2010

微分幾何学的手法で、(1) 猫の宙返りモデルのポートハミルトン形式での定式化と制御、及び計算機内での宙返りの実現、 (2) 対称性群の両側変換のもとでの線形変形体の古典及び量子力学の簡約化、(3)回転群の離散部分群のもとで不変な、2次元球面上で定義されたパラメータ付きエルミート行列に付随する固有空間バンドルのチャーン数のパラメータ依存性、 (4) 行列の特異値分解に対応するリーマン幾何学的最適化問題の解法、(5) その他の課題をそれぞれ研究した。

2018-02-08 00:22:05
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https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22540225/

1 0 0 0 OA 子宮収縮波と自覚症状および早産指数との関係について

著者: 阪井胖冨沢明子小林八郎浜西正三岩井敏子
出版者: 近畿産科婦人科学会
雑誌: 産婦人科の進歩 (ISSN:03708446)
巻号頁・発行日: vol.42, no.5, pp.593-602, 1990 (Released:2011-07-05)
参考文献数: 12

1. i) In threatened premature labor, viewed from a uterine contraction wave and a subjective complaint obtained by means of a cardiotocogram, B waves and L waves were observed in many cases when the patient complained of a lower abdominal pain and/or lumbago.With these pains, or with a complaint of abdominal distension, the threatened premature labor is possible, and an objective evaluation of uterine contractions by means of the cardiotocogram is necessary.The uterine contraction was recorded with a cardiotocogram.The recorded waves were evaluated by Nakae's classification (1978), and given points for each wave : 1 point for A wave, (31-60 sec), 1.5 point for B wave (61-180 sec).ii) From this study, as a prime therapeutic factor, the wave of uterine contractions with less than two contractions (A and/or B waves) in 30 minites, i.e. below 3 points of contraction is provided.2. Correlativity between these points and lower abdominal pain and lumbago is heightened and subjective complaints are increased as the point of uterine contraction becomes larger.3. In the case of 4 points of contraction or more, subjective complaints with lower abdominal distension, lower abdominal pain and lumbago were considerably increased.4. In the case of uterine contractions with more than 7 points having such pains as lower abdominal pain and lumbago, the patient was prematurely delivered at a relatively earlier time.5. The uterine contraction, one of the four factors in Tocolytic Index (T.I.) (Baumgarten, 1974) which is frequently used in foreseeing pre-term delivery mentions just irregular or regular. To assure more concrete determination, we studied the uterine contraction points in order to apply them to T.I.

2017-06-28 02:58:58
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1 0 0 0 OA 連載講座「放射線防護に用いる線量概念について」第2回線量係数Q(L)および放射線荷重係数w_Rの概念の成立と変遷

著者: 岩井敏
出版者: 日本保健物理学会
雑誌: 保健物理 : hoken buturi (ISSN:03676110)
巻号頁・発行日: vol.43, no.3, pp.211-225, 2008-09

In the field of radiation protection, quality factor Q(L) and radiation weighting factor w_R are important coefficients for estimating both radiation protection and operational quantities to the mixed types of radiation exposure. However, some inconsistencies might be found between Q(L) and w_R for estimating effective dose, for example. Some inconsistencies are attributed to incomplete definition of terms Q(L) and w_R. This report presents the root and evolution of quality factor Q(L) and radiation weighting factor w_R for the years 1931-2007, to clarify the current issues of inconsistencies to be solved.