著者

礪波 健一 田村 友寛 高橋 英和 荒木 孝二

出版者

特定非営利活動法人日本歯科保存学会

雑誌

日本歯科保存学雑誌 (ISSN:03872343)

巻号頁・発行日

vol.55, no.5, pp.320-327, 2012-10-31

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目的:近年,審美歯科へのニーズの高まりから,歯の漂白が歯科臨床で行われる機会が増えている.一方,漂白作用の本質を担う活性酸素の作用は非特異的であるため,象牙質の機械的特性にも影響を与えることがわかっている.本研究では,漂白処理後の歯の象牙質の引張強さについてワイブル分析を行い,処理面や処理回数といった条件の違いが象牙質の破壊原因の違いに及ぼす影響について検討した.材料と方法:牛切歯の歯冠唇面を薄切し,象牙質に漂白処理面を形成した.同面に漂白処理として,ハロゲンランプ照射下で30%過酸化水素水を15分作用させた.漂白処理回数は1回もしくは3回とした.漂白処理した牛切歯の歯冠唇側表面からの深さ2.5〜3.5mmの象牙質よりダンベル型の象牙質引張試験片を作成し,象牙質引張試験を行った.各条件ともn=10とし,引張強さの平均をその条件の引張強さとした.上記象牙質処理の2条件に加え,既報(J Med Dent Sci 2008; 55: 175-180)で得られたエナメル質処理2条件および,コントロールの引張強さを用いて,統計処理とワイブル分析を行った.ワイブル分析では,各条件のワイブルプロットについて,回帰直線の傾きとして得られるワイブル係数を求め比較した.成績:象牙質引張強さは,漂白処理回数が増えるほど低下する傾向を示したが,エナメル質処理,象牙質処理で象牙質引張強さに違いは認められなかった.一方,ワイブル分析ではエナメル質処理,象牙質処理でワイブルプロットに違いを認めた.すなわち,象牙質処理群では処理回数の増加に従い,ワイブルプロットが全体的に低強度側に移動したのに対し,エナメル質処理群では,漂白処理により強度の順位が高い試片の強度が下がる傾向を示した.象牙質処理では活性酸素の影響がほかの欠陥を凌駕して単一の破壊原因となる一方,エナメル質処理では活性酸素の影響が既存の欠陥と競合する形で破壊原因の一つに加わったことが,ワイブルプロットの違いとなったことが考えられる.ワイブル係数はエナメル処理群において処理回数とともに増加したことから,信頼性の点からはエナメル質処理のほうが象牙質強度に与える漂白処理のリスクが少ないことが考えられた.結論:以上の結果より,漂白歯の象牙質引張強さは漂白処理回数や,処理面に影響を受けるため,臨床において象牙質強度に配慮した漂白処置が必要であることが示唆された.

著者

Takanori Ikeda Takeshi Yamashita Masaharu Akao Hirotsugu Atarashi Yukihiro Koretsune Ken Okumura Wataru Shimizu Hiroyuki Tsutsui Kazunori Toyoda Atsushi Hirayama Masahiro Yasaka Takenori Yamaguchi Satoshi Teramukai Tetsuya Kimura Jumpei Kaburagi Atsushi Takita Hiroshi Inoue

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.86, no.2, pp.202-210, 2022-01-25 (Released:2022-01-25)

参考文献数

41

被引用文献数

3

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Background:Data on outcomes for patients with atrial fibrillation (AF) and active cancer are scarce. The effect of active cancer on thrombosis and bleeding risks in elderly (≥75 years) patients with non-valvular AF (NVAF) enrolled in the All Nippon AF In the Elderly (ANAFIE) Registry were prospectively analyzed.Methods and Results:In this subanalysis of the ANAFIE Registry, a prospective, multicenter, observational study conducted in Japan, we compared the incidence rates of clinical outcomes between active cancer and non-cancer groups. Relationships between primary outcomes and anticoagulation status were evaluated. Of the 32,725 patients enrolled in the Registry, 3,569 had active cancer at baseline; 92.0% of active cancer patients received anticoagulants (23.7%, warfarin; 68.2%, direct oral anticoagulants [DOACs]). Two-year probabilities of stroke/systemic embolic events (SEE) were similar in the cancer (3.33%) and non-cancer (3.16%) groups. Patients with cancer had greater incidences of major bleeding (2.86% vs. 2.04%), all-cause death (10.95% vs. 6.77%), and net clinical outcomes (14.63% vs. 10.00%) than those without cancer. In patients without cancer, DOACs were associated with a decreased risk of stroke/SEE, major bleeding, all-cause death, and net clinical outcome compared with warfarin. No between-treatment differences were observed in patients with active cancer.Conclusions:Active cancer had no effect on stroke/SEE incidence in elderly NVAF patients, but those with cancer had higher incidences of major bleeding events and all-cause death than those without cancer.

著者

山後 喬

出版者

東海学園大学

雑誌

東海学園大学研究紀要. 社会科学研究編 (ISSN:21859019)

巻号頁・発行日

no.19, pp.55-70, 2014-03

著者

山本 忠次

出版者

公益社団法人 日本鋳造工学会

雑誌

鋳物 (ISSN:00214396)

巻号頁・発行日

vol.26, no.2, pp.84-94, 1954

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&nbsp;&nbsp;By investigating the sand adhering phenomena on the foundry products and the laboratory specimens, the chief causes were analysed and therefrom the factors of its prevention were determined. </br>&nbsp;&nbsp;&ldquo;Burn-on&rdquo;, the phenomenon which is generally called for &ldquo;Hard adherence of sand or core&rdquo;, in Japanese foundries can be cl ssif ed into two types; one is the adhesion of fused and sintered sand on the casting surface, and the other is caused by the penetration of metal into the mould surface. The adhesion phenomena mostly found in foundries belong to the latter type, which was chiefly investigated in this work. </br>&nbsp;&nbsp;Macroscopic and microscopic examinations show that the slag formation between cast metal and the mould surface is an effective factor of preventing penetration, provided that the casting temperature, the solidifying time, the static pressure of metal, etc., are not extremely severe. </br>&nbsp;&nbsp;The oxidation of the interface between the metal surface and the mould is violent, and the penetrated metals are much decarbonized. Some examples of selective oxidation of Mn and Fe are listed-up by analysing the slag layer. </br>&nbsp;&nbsp;For the static pressure of molten metal, the result of the laboratory test and calculation show that the metal penetration is very remarkable when the blacking, slag formation and the back pressure do not exist. </br>&nbsp;&nbsp;From the thermochemical point of veiw concerning the process of penetration, it is concluded that the fundamental natures of moulding sand, that is, the high purity, good refractoriness and the round shape are the most important factors of preventing penetration. </br>&nbsp;&nbsp;In addition, required factors of preventing penetration in the foundry practice are summarized.

著者

タァンクァン ファン 山本 純一

雑誌

第82回全国大会講演論文集

巻号頁・発行日

vol.2020, no.1, pp.197-198, 2020-02-20

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人口減少問題により生産性向上が望まれている。生産性向上には組織全体の効率化が必要である。経営学研究から組織効率にはノウフー(Know who)が重要であるとわかっている。ノウフーは「誰が何を知っているかを知っている」ということである。従来のノウフーシステムは知りたい人と知っている人の関係性まで考慮されていない。結果として、聞きずらいために知識が上手く共有されないということが考えられる。本研究では、二者間の親密度を考慮した知識のノウフーシステムについて検討した。具体的には、社内のチームチャットのやり取りデータからネットワーク構造を構築し、経路探索することで社員が「自分と親密な人」経由で誰が知っているかのノウフーをフィードバックする仕組みについて論じる。

著者

古川 修

出版者

一般財団法人 住総研

雑誌

住宅建築研究所報 (ISSN:02865947)

巻号頁・発行日

vol.10, pp.25-48, 1984 (Released:2018-05-01)

著者

松井 健太 山本 和弘

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 B編 (ISSN:03875016)

巻号頁・発行日

vol.76, no.765, pp.896-902, 2010

参考文献数

21

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Since particulate matters (PM) emissions including soot from diesel cars do harm to our health, a diesel particulate filter (DPF) has been used in the after-treatment of exhaust gas. It is reported that DPF filling with PM causes higher back-pressure and more fuel consumption, and continuously regenerating PM trap system is needed. Then, we have focused on the diesel exhaust gas perfect burning system (DEGPBS) developed by COTEC, Ltd., where soot is trapped and burned by the heater. However, the phenomena in the system are not well understood, because it is difficult to conduct the measurement inside the filter. In this study, we simulated soot combustion and deposition by the lattice Boltzmann method to observe the combustion field in the filter. The inner structure of the filter was obtained by a 3D X-ray CT technique. Results show that the heat and mass transport in DEGPBS are well visualized. It is found that temperature of the filter and oxygen concentration are important factors to burn soot in exhaust gas.

著者

Puriene Alina Aleksejuniene Jolanta Petrauskiene Jadvyga BALCIUNIENE Irena JANULYTE Vilija

出版者

独立行政法人 労働者健康安全機構 労働安全衛生総合研究所

雑誌

Industrial health (ISSN:00198366)

巻号頁・発行日

vol.46, no.4, pp.369-374, 2008

被引用文献数

51

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This article describes the second phase of a large study of Lithuanian dentists' health, and focuses on self-reported physical health complaints, general health state and associations between the two. In 2006, a postal questionnaire survey of all (N=2,449) licensed dentists registered with the Lithuanian Dental Association was conducted, obtaining a response rate of 68.2%. Fatigue (94.7%) and back pain (91.0%) were the most prevalent physical complaints reported, and they were also the most likely to become chronic among all physical disorders. Hypertension, joint diseases and allergy were the most prevalent diagnosed and treated diseases during the previous 12 months. Only half of the surveyed Lithuanian dentists (50.4%) rated their health as satisfactory. Logistic regression revealed that fatigue (Odds Ratio: 0.52; 95%CI: 0.29-0.94), headache (OR: 0.62; 95%CI: 0.42-0.90), hand problems (OR: 0.62; 95%CI: 0.44-0.87), chest pain (OR: 0.51; 95%CI: 0.40-0.64) and musculoskeletal complaints (OR: 0.41; 95%CI: 0.28-0.60) had a significant negative impact on dentists' self-reported general health. Overall, this study suggests that Lithuanian dentists do experience a certain amount of occupationally-related health problems. It is therefore important to increase health knowledge on occupational hazards and also to emphasize the importance of early diagnosis and treatment for these disorders in Lithuania, as elsewhere.<br>

著者

徳見 道夫

出版者

九州大学言語文化部

雑誌

言語文化論究 (ISSN:13410032)

巻号頁・発行日

pp.31-41, 1999-10-31

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There are two movie versions of Shakespeare's Henry V in this century: one is Laurence 0livier's (1944) and the other is Kenneth Branagh's (l989). In this paper I will examine these two versions along with stage performances in England in 1997: specifically, productions by the Royal Shakespeare Company (at Stratford-upon-Avon and the Barbican), and by the Globe Company of Actors at the Globe Theatre. When comparing the movie versions with stage perfomances it is immediately noticeable that a movie director has more freedom than a stage director because the former has fewel limitations and can use camera techniques such as close-ups and slow-motion which are unavailable in the theatre. Each movie focuses on a particular message: Laurence Olivier aims to show the past glory of England and to encourage English people to fight Germany while Kenneth Branagh concentrates on the misery of war within the context of the Cold War and Vietnam. 0iivger and Branagh have completely different views of the play, each affected by their respective historical situations. I argue, however, that Branagh's movie better reflects Shakespeare's intentions than Olivier's because the latter overstates Shakespeare's emphasis on the importance of National prestige. Stage performances have also offered widely different interpretations of the play. In 1997, I saw two versions that gave very different senses of Henry V. The Royal Shakespeare Company, for example, almost omitted the scene in which the Archbishop of Canterbury explains to the King that he has the right of succession to the French crown. This scene, however, is of great importance because the Salic law is closely connected to the theme of the play. That law is antithetical to the action of the play in which Henry unites masculinity with femininity by marrying Katherine, who represents feminine characteristics (this is demonstrated by her learning English from Alice after Henry's threatening speech before the governor of Harfleur). Of cource, movie and stage directors have a licence to adapt and appropriate as they interpret the play, but this can sometimes lead to a distortion of Shakespeare's original intentions.

著者

松本 伊左尾 今井 誠一

出版者

新潟県食品研究所

巻号頁・発行日

no.25, pp.1-3, 1990 (Released:2011-03-05)

著者

遠山 宏明 足立 暁生

出版者

一般社団法人情報処理学会

雑誌

情報処理学会論文誌 (ISSN:18827764)

巻号頁・発行日

vol.37, no.11, pp.1886-1896, 1996-11-15

参考文献数

8

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混合グラフのもとでのチャイニーズ・ポストマン問題(CPP)はNP完全であることが示されている. すべての辺の長さが等しい混合グラフ 平面混合グラフ 最大次数を3に制限した混合グラフのもとでさえNP完全である. 一方 グラフを全有向 または全無向に制限したCPPは多項式時間アルゴリズムを持つ. 本論文では 各辺の通行回数をたかだか2回に制限したCPP (2-CPP)がNP完全であり ちょうど1回に制限したCPP(1-CPP)はPに属することを示した. また CPP に関連する2つの興味ある関数の計算量も示した: (i)2-CPPにおいて 配達路の数を計算する関数は#P完全である (ii)CPPにおいて コスト k 以下で配達するためには 同一辺を少なくとも何回通行しなければならないかを計算する関数は多項式時間階層のクラスΔ^P_2に属する.The Chinese Postman Problem (CPP) on the mixed graphs is shown to be NP-complete. It remains NP-complete even if restricted to those whose edges all have equal length, or to the one on the mixed planner graphs, or to the one on the mixed graphs with nodes of degree three. CPP can be solved in polynomial time if the graph is either directed or undirected. In this paper, we show that even if the number of traverses for each edge is restricted to at most twice, CPP on the mixed graphs (called 2-CPP) is NP-complete, and if the number of traverses for each edge is restricted to exactly once, CPP on the mixed graphs (called 1-CPP)is in P. We also show complexity of two related functions: (i) in 2-CPP the function that calculates the number of delivery paths is #P-complete, oh the other band, (ii) in CPP the function that calculates the minimum of the maximum traverse numbers for each delivery path of cost k or less belongs to the class AZ in the polynomial time hierarchy.

著者

本明 寛 織田 正美 木村 裕

出版者

公益社団法人 日本心理学会

雑誌

心理学研究 (ISSN:00215236)

巻号頁・発行日

vol.43, no.3, pp.113-124, 1972-08-10 (Released:2010-07-16)

参考文献数

13

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The purpose of this study was to investigate the effect of personality traits of car salesman on the sales performancesJust prior to engaging in practical business, 106 car salesmen underwent the Salesman Test which consisted of 10 personality scales (Adaptability, Creative attitude, Motivation, Alignment, Circumspectness, Sense of responsibility, Self-confidence, Version, Magnanimity and Comprehensibility).Results obtained from the analyses of relationships between the total number of cars sold over a fourteen-month peirod and the scores of the Salesman Test were as follows:1. The upper third of all subjects in respect of their sales performances had scored significantly higher than the lower third of them in Creative attitude, Motivation, Circumspectness and Self-confidence.2. Personality traits which had positive and significant correlation to the sales performances were Adaptability, Creative attitude, Motivation and Self-confidence.3. Personality traits which had positive and significant partial correlation to the sales performances were Creative attitude, Motivation, Alignment, Circumspectness and Sense of responsibility.4. Through Multiple Regression Analysis, partial regression coefficients of sales performances to the personality traits were computed. The partial regression coefficients to Creative attitude, Motivation, Alignment, Circumspectness and Sense of responsibility were positive and significant.From the above-mentioned results, it could be concluded that personality traits which had effect on the sales performances and, therefore, were useful to predict their performances were Creative attitude, Motivation and, Circumspectness. Furthermore, since the significant multiple regression coefficient was larger than any one of the correlation coefficients, the multiple prediction could be more valid than the prediction by some of the personality traits described above.

著者

村上 祐子

出版者

一般社団法人 人工知能学会

雑誌

人工知能 (ISSN:21882266)

巻号頁・発行日

vol.34, no.2, pp.176-181, 2019-03-01 (Released:2020-09-29)

著者

山口 秀文 上野 浩一

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.75, no.654, pp.1807-1814, 2010-08-30 (Released:2010-10-08)

参考文献数

8

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This study clarifies the transformation process of the building arrangement and gardens on the detached housing area. The study area is the planned housing area in Kami-Kotoen, Nishinomiya. In this area has developed since about 50 years, has not been decided the district plan and the building agreement, has maintained its living environment. The main information obtained is as follows: (1) This area has the four phases of the transformation process. (2)The extended and rebuild time relate with the change of family member. (3)The site arrangement has the site use divided nine parts, based on the original house.

著者

Hitonobu Tomoike Hiroyuki Yokoyama Yoko Sumita Sotaro Hanai Akiko Kada Tomonori Okamura Junichi Yoshikawa Yoshinori Doi Masatsugu Hori Chuwa Tei on behalf of the Scientific Committee of the JCS

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.79, no.5, pp.1058-1067, 2015-04-24 (Released:2015-04-24)

参考文献数

33

被引用文献数

18 19

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Background:The geographic distribution of cardiovascular (CV) health-care services has not been assessed systematically.Methods and Results:Data of the Japanese Circulation Society (JCS) annual survey were provided to the JCS working group with the permission of the JCS Scientific Committee. The status of CV practice in 2010 was then assessed in 47 prefectures retrospectively, along with national census and gross domestic product (GDP) data. The surveyed indices included resources (hospitals, beds and cardiologists), burden (number of inpatients), and outcome (CV mortality and autopsy) in each prefecture, which correlated well with respective populations or GDP. Inequality of geographic distribution was evident for pediatrics among the 47 prefectures, according to Lorenz curve, Gini coefficient or the maximum/minimum ratio for each index. According to the Gini coefficients, only the number of inpatients (medical or acute myocardial infarction) and beds for the total number of general hospitals or the hospitals surveyed in the present JCS study were lower than expected with regard to GDP.Conclusions:Geographic disparity of CV resources or burden was larger in pediatrics than in CV medicine or surgery. Improvement of equality in CV practice with regard to appropriateness and quality are the coming challenges for the JCS. (Circ J 2015; 79: 1058–1067)

著者

飛高 隆夫

雑誌

大妻女子大学紀要. 文系

巻号頁・発行日

vol.28, pp.65-78, 1996-03

著者

池田 文昭 大友 寿美 中井 徹 森下 佳彦 牧 克之 俵 修一 武藤 誠太郎 松本 文夫 桑原 章吾

雑誌

日本化学療法学会雜誌 = Japanese journal of chemotherapy (ISSN:13407007)

巻号頁・発行日

vol.50, pp.8-19, 2002-12-10

参考文献数

34

被引用文献数

33

著者

松村 秀一

出版者

一般財団法人 住総研

雑誌

住宅総合研究財団研究年報 (ISSN:09161864)

巻号頁・発行日

vol.26, pp.31-42, 2000 (Released:2018-05-01)

著者

橋本 明 Akira HASHIMOTO

雑誌

愛知県立大学教育福祉学部論集 = Bulletin of The Faculty of Education and Welfare Aichi Prefectural University (ISSN:18848931)

巻号頁・発行日

no.64, pp.101-109, 2016-01-29

著者

高山 芳幸 横山 敦郎 齋藤 紘子

出版者

北海道大学

雑誌

基盤研究(C)

巻号頁・発行日

2012-04-01

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まず骨質を表すパラメータ(皮質骨厚,海綿骨のヤング率)を種々変化させた有限要素解析を行い,骨の最大ひずみを評価値として応答局面を作成した.次に,インプラントのサイズを最適化手法を用いて検討したところ,海綿骨のヤング率が0.5GPa以下の場合,インプラントのサイズを大きくしても生理的なひずみの限界値を超え,インプラント先端部周囲の海綿骨に最大歪みがみられた.しかし,CTデータから構築したモデルによる解析では,最適化計算の結果と比較して,歪みの値はやや低く,最大相当歪みの現れる位置が異った.これは,CTから作成したモデルでは,骨の物性が部位によって大きく異なっていたことが原因と考えられた.