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1 0 0 0 ゴムの極限伸張比と橋かけ点間分子量の関係

著者: 鈴木進戸崎近雄川島正昭小谷悌三木村滋章水島克己
出版者: 一般社団法人日本ゴム協会
雑誌: 日本ゴム協会誌 (ISSN:0029022X)
巻号頁・発行日: vol.42, no.4, pp.254-259, 1969
被引用文献数: 3

橋かけまたは加硫したゴムの伸びを温度を変えて測定するとある温度 (Tmax と呼ぶ) で極大値を示す. この極大値を極限伸張比αc(=1+γbmax) と考えると, 同一ゴム, 同一加硫系では, 網目間鎖数濃度νeの逆数の平方根に, 橋かけ点分子量Mcの平方根に比例することがわかった. αcのM1/2cに対するこう配はゴムの種類, 加硫系によって変化した. 一方, Tmax は網目間鎖数濃度νeとともにほぼ直線的に減少し, そのこう配もゴムの種類, 加硫系によって変化した. またこれら試料のガラス化点, Tgはνeとともに直線的に上昇した. Tmax 付近でゴム分子が十分に伸びきっていると考えて, 逆ランジュバン関数からセグメントの数nを推定し, 一方, Mcをモノマー単位の分子量mで割った値, Mc/mを求めた. また, αc=√nとして, セグメント数nを推定した. これらの値を比較して, Tmax 付近でゴム分子がかなり伸びきってから切断すること, 極限伸びはセグメント数の平方根から推定されること, αc(Mc/m)1/2の値を分子の剛さの尺度としてよいであろうことを結論した.

2019-06-29 18:38:35
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1 0 0 0 OA 医学研究における数的研究と症例研究の相補的関係

著者: 生地新
出版者: 日本民族衛生学会
雑誌: 民族衛生 (ISSN:03689395)
巻号頁・発行日: vol.81, no.6, pp.180-185, 2015-11-30 (Released:2016-01-04)
参考文献数: 2

It seems that research designs with large sample size employing statistical analysis are regarded as valuable in modern research of medicine or public health. Significance of case study may be forgotten in recent years. In quantitative researches based on a large number of cases, individuality and bumpiness of each cases are leveled flatly, and we cannot acquire precise information about personal histories behind each cases, course of diseases or process of treatment from such researches. Case studies can provide meaningful information to those engaged in clinical practice or public health activities in communities. There is complementary relationship between quantitative researches with large sample size and case studies, and both types of study are essential. However, professional skills which each professional acquire through his experience are not sufficiently described in case studies as well as in qualitative researches. The author thinks that we could acquire professional skills only through working with and learning from experts under apprenticeship system. In medical disciplines, we come to be able to make scientific and effective interventions, when three types of learning; knowing information from qualitative researches, learning from case studies and acquisition of skills through practical experience under apprenticeship system, meet together.

2019-06-29 17:51:43
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1 0 0 0 OA 京都図案家銘鑑

著者: 豊田豊編
出版者: 近代美術工芸社
巻号頁・発行日: 1922

2019-06-29 17:49:39
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1 0 0 0 OA 知る権利と国家機密: 特定秘密保護法を題材に

著者: 韓永學
出版者: 日本マス・コミュニケーション学会
雑誌: マス・コミュニケーション研究 (ISSN:13411306)
巻号頁・発行日: vol.85, pp.123-141, 2014-07-31 (Released:2017-10-06)
参考文献数: 27

The objective of this article is to explore the status of the right to know in the special secrecy law. I found that the law gives much attention to safeguarding "special secrets" but has no regard for the people's right to know. Firstly, the law virtually admits its classification of what is a special secret is too wide-ranging, but restricts the declassification and disclosure of such secrets. Also the law has a chilling effect on whistle-blowing. Secondly, there is little guarantee of the Japanese Diet, the court and third party organizations checking on the enforcement of the special secrecy law. Thirdly, the provision in consideration of press freedom in the law does not have a substantial effect. In view of these serious defects, the law should be abolished or radically amended.

2019-06-29 17:49:06
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1 0 0 0 IR ヘッドホンアンプの作成と周波数測定

著者: 日高幸祐吉田凌渡邉颯人吉田悠真吉田森安倍幸治西口正之渡邉貫治高根昭一
出版者: 秋田県立大学
雑誌: 秋田県立大学学生自主研究研究成果
巻号頁・発行日: vol.29, 2018-08

2019-06-29 17:45:51
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https://ci.nii.ac.jp/naid/120006484000

1 0 0 0 OA 大気圧空気中の絶縁破壊前駆現象と湿度の影響

著者: 新田東平川根清山田直也
出版者: 一般社団法人電気学会
雑誌: 電氣學會雜誌 (ISSN:00202878)
巻号頁・発行日: vol.86, no.931, pp.629-638, 1966-04-01 (Released:2008-04-17)
参考文献数: 15

2019-06-29 17:32:00
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1 0 0 0 OA ミトコンドリアDNA変異を用いた種判別:沖縄県首里城出土マカク古骨と現生種の比較

著者: 毛利俊雄吾妻健石上盛敏川本芳
出版者: Primate Society of Japan
雑誌: 霊長類研究 (ISSN:09124047)
巻号頁・発行日: vol.16, no.2, pp.87-94, 2000 (Released:2009-09-07)
参考文献数: 10
被引用文献数: 7 8

We report a species identification by mitochondrial DNA of a partial macaque skeleton excavated from Shuri Castle, Okinawa, the estimated age of which is around the 16th or 17th century AD. Species identification by gross morphology was not possible because of the following reasons; sufficient parts are not preserved, no natural distribution of non-human primates including macaque is recorded in the Ryukyu islands, and the genus Macaca is highly speciose. DNA amplification of D-loop variable region (ca 200bp) was first unsuccessful with the use of previously devised sets of primers which encompass the whole region, and is accomplished by using newly devised sets of primers, each of which is designed for anterior or posterior portion of the targeted region. Sequenced DNA of the Shuri macaque completely agrees with a sequence of Yaku macaques (Macaca fuscata yakui). For the comparison with or species identification of Shuri macaque, we sequenced the same region of DNA (variable region of D-loop) from four species of macaques (Macaca fuscata, M. cyclopis, M. mulatta and M. fascicularis). Ample variations of substitutions and insertion/deletion mutations are discovered both intra- and inter-specifically. A neighbor-joining tree based on nucleotide substitutions is depicted with bootstrap values (Fig. 4). In this study, a monkey skeletal remain excavated from Okinawa is safely identified as a Yaku macaque by the use of mitochondrial DNA. This suggests a promising future of genetic analyses for archaeological information retrieval. It is also emphasized that, for the proper assessment of the genetic information from archaeological remains, fuller genetic studies of the living animals are critically important.