著者
冨江 瑛彦 久慈 千栄子 赤塚 亮 佐々木 啓一 嶋田 慶太 水谷 正義 厨川 常元
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 (ISSN:21879761)
巻号頁・発行日
vol.83, no.856, pp.17-00169-17-00169, 2017 (Released:2017-12-25)
参考文献数
3
被引用文献数
1

Powder jet machining is one of blasting processes conducted under room temperature and atmospheric pressure. This process brings both deposition and removal process, and in this study, it refers to powder jet deposition (PJD) and abrasive jet machining (AJM). As an application of PJD, the authors have proposed an innovative dental treatment method with the hydroxyapatite (HA) fine particle. By this method, thick HA coating can be fabricated directly in the human oral cavity. In this study, the effect of the particle impact angle was investigated as a parameter that affects the machining phenomenon. The experiments showed that the machining phenomenon transited depending on the blasting angle. In the vertical blasting condition, PJD process was just observed. On the other hand, in the more acute blasting angle such as 45 deg. or 60 deg. both coating and removal process appeared at the same time and in the most acute angle of 30 deg. only removal process was detected. The TEM observations showed that the impact surface of the HA substrate deformed and the deformation depth increased as the blasting angle get more acute. The smoothed particle hydrodynamics (SPH) method was utilized for the analysis for the fracture behavior of the HA substrate. The result indicated that the decrease of the impact angle induced the increase of the strain and the temperature of the interface between the particle and the substrate. Thus it is concluded that the shear stress, which refers to the impact angle, induces the destruction of the substrate by the deformation and the brittle fracture due to the thermal stress.
著者
佐々木 顕
出版者
一般社団法人 日本生態学会
雑誌
日本生態学会誌 (ISSN:00215007)
巻号頁・発行日
vol.56, no.1, pp.73-77, 2006-04-25 (Released:2016-09-06)
参考文献数
15
被引用文献数
2

本特集をまとめるにあたり、軍拡競走の理論と検証の統合を目指す研究のモデルケースになると考えられる3つの例を論じることにする。第一の例は、本特集でとりあげたSasaki-Godfrayモデルのきっかけになったショウジョウバエ抵抗性と寄生蜂ビルレンスの軍拡競走に関する飼育実験、第二は本特集および第52回生態学会のシンポジウムを組織する理由となった東樹と曽田によるヤブツバキとツバキシギゾウムシの防御・攻撃形質の軍拡競走の野外研究と津田によるマメゾウムシの穿孔深度と寄生蜂の産卵管長の共進化に関する理論的研究、そして最後にバクテリアの抵抗性とその溶菌性フアージ病原性軍拡競走に関するBucklingの共培養進化実験についてである。
著者
星 秀夫 佐々木 稔
出版者
The Iron and Steel Institute of Japan
雑誌
鉄と鋼 (ISSN:00211575)
巻号頁・発行日
vol.91, no.1, pp.103-107, 2005-01-01 (Released:2009-06-19)
参考文献数
4
被引用文献数
2 4

供試材である日本刀の三振りを切断し多くの項目について調査した結果,炭素以外の諸元素が極めて少ない高純度の炭素鋼であることが鍛接性を良くし耐食性を高め,また刀身全表面に圧縮残留応力をもたせることが日本刀の靱性をさらに強化すること等が確認できたことである.
著者
荒井 啓行 鈴木 朋子 佐々木 英忠 花輪 壽彦 鳥居塚 和生 山田 陽城
出版者
一般社団法人 日本老年医学会
雑誌
日本老年医学会雑誌 (ISSN:03009173)
巻号頁・発行日
vol.37, no.3, pp.212-215, 2000-03-25 (Released:2009-11-24)
参考文献数
10
被引用文献数
5 10

Choline acetyltransferase 活性増強作用と神経栄養因子様作用を有する漢方処方の加味温胆湯 (KUT) を用いて, Alzheimer 病 (AD) への治療介入を試みた. 認知機能は, Folstein らの Mini-Mental State Examination (MMSE) スコアで評価し, その年変化を指標とした. Baseline MMSEは, KUT群 (20例) で18.6±6.8, コントロール群 (32例) で20.8±5.6であった. KUTは北里研究所東洋医学研究所薬局処方集第3版に基づき, 煎出し, 平均約1年間服用した. 悪心, 嘔吐, 下痢などのコリン作動性神経刺激症状は認められなかった. コントロール群では, MMSE年変化は4.1ポイントの悪化であったのに対して, KUT群では1.4ポイントの悪化であった (p=0.04). KUTの効果は漢方医学的ないわゆる証やApoE遺伝子型に依存しなかった. KUT投与前後で脳脊髄液tau値やAβ1-42値に有意な変動は見られなかった. KUTは, 少なくとも初期から中期にかけてのADにおいて進行抑制効果を有するものと考えられた.
著者
小南 陽子 相方 浩 平松 憲 田中 未央 苗代 典昭 中原 隆志 本田 洋士 長沖 祐子 村上 英介 宮木 大輔 三木 大樹 河岡 友和 高木 慎太郎 平賀 伸彦 柘植 雅貴 芹川 正浩 今村 道雄 兵庫 秀幸 川上 由育 高橋 祥一 佐々木 民人 茶山 一彰
出版者
一般財団法人 日本消化器病学会
雑誌
日本消化器病学会雑誌 (ISSN:04466586)
巻号頁・発行日
vol.110, no.3, pp.456-464, 2013 (Released:2013-03-05)
参考文献数
24
被引用文献数
1

症例は61歳男性.毎年,検診にて40mm大の肝嚢胞を指摘されていたが,2011年の腹部超音波検査にて肝嚢胞の増大を指摘.造影CT検査などの各種検査を行ったが確定診断に至らず,嚢胞周囲の軽微な胆管拡張の精査目的にてERCPを施行.その際の胆汁細胞診にて多量の肝吸虫卵を認め,肝吸虫症と診断.プラジカンテルの内服により肝嚢胞の縮小と血中肝吸虫抗体価の陰性化が得られ,肝吸虫の駆虫が確認された.
著者
佐々木 豊史 宮崎 浩一
出版者
電気通信大学
雑誌
電気通信大学紀要 (ISSN:09150935)
巻号頁・発行日
vol.17, no.1, pp.21-32, 2005-01-31

In this article, we examine whether bad news on a company impacts on the correlations betweenthe equity return of the company and those of other companies based on the Japanese equity datain 1997, when some of major financial institutions bankrupted. We define "contagion" or "exclusion" as a significant increase or decrease, respectively, in the correlation after the announcement of thebad news. Our major findings are (1) whether the effect of the bad news is "contagion" or "exclusion" basically depends upon the nature of the bad news, (2) heteroskedasticity in thecorrelation has some influence on the identification of the bad news effect and it is important toadjust the heteroskedasticity in the correlation to correctly identify the effect.
著者
柴田 和博 佐々木 一男 島崎 佳郎
出版者
日本作物學會
雑誌
日本作物学会紀事 (ISSN:00111848)
巻号頁・発行日
vol.39, no.4, pp.401-408, 1970-12
被引用文献数
1

Growing the rice plants under each condition of some possible combinations of the daytime air-temperatures (A_D: 26,20 and 14℃), the daytime water-temperatures (W_D: 26,20 and 14℃),the nocturnal air-temperatures (A_N: 20,14 and 8℃), the nocturnal water-temperatures (W_N:20,14 and 8℃) and the number of days of treatment (P: 3,6 and 9 days) at each stage of growth, the autliors examined their main effects and interactions on the percentage of sterile grains. The daytime was settled for eight hours from 9.00 a.m. to 5.00 p.m. and the night-time was settled for sixteen hours from 5.00 p.m. to 9.00 a.m. of the following day. The depth of water was kept in four cm. above the soil surface in pots. The experimental design was 3^5 factorial in 81 units (1/3 replicate) with one block and defining contrasts 1=A_DW_DA_NW_N^2P. The results were summarized as follows; 1. At the differentiating stage of first bract primordia (T_3), all the main effects and their two-factor interactions were not significant (table 4). 2. At the middle differentiating stage of primary branch primordia (T_4), only the main effect of A_D was significant at 5% level. However, that was not considered to be important because the differences of the percentage of sterile grains among them were smaller than 3%(tables 3 and 4). 3. At the stage of reduction division of pollen mother cells (T_5), the main effects of A_D, A_N and P and all of their two-factor interactions were significant at 0.1 or 1% levels. Moreover, the effects of W_D, W_D × A_N and W_D × W_N were also significant at 5% level. The contour lines of each pefcentage of sterile grains based on A_D and A_N were straight and parallel with the line of mean air temperature for three day treatment (fig. la). On the other hand, the contour lines for six and nine day treatments were curve together (fig. 1b-c). 4. At the head emergernce stage (T_6), the effects of A_D, A_N, P, and A_N × P and A_N × P were significant at 0.1% level. However, for three day treatment, A_D and A_N didn't affect the percentage of sterile grains. For six and nine day treatment, A_D and A_N were effective and their contour lines of each percentage of sterile grains were curve (fig. 2b-c). 5. The optimum ranges between A_D and A_N to minimize the percentage of sterile grains for each mean air-temperature were found in all the cases in which the contour lines were curve. The lower the mean air-temperature became, the bigger the optimum range between A_D and A_N became in most cases. Moreover, the optimum combinations of A_D and A_N to minimize the percentage of sterile grains were found to be about 24-20℃ in all cases (fig. 1〜2).
著者
佐々木 達司
出版者
一般社団法人 日本エネルギー学会
雑誌
燃料協会誌 (ISSN:03693775)
巻号頁・発行日
vol.52, no.4, pp.268-281, 1973-04-20 (Released:2010-06-28)

Mianmi-Yokohama Thermal Power Station (Tokyo Electric Power Co, LTD.) is the first power station in the warld, which burns L. N. G. only.This article discribes the installations and actual results during about two years after construction of the power plant.
著者
太田 陽子 小田切 聡子 佐々木 寿 向山 栄
出版者
公益社団法人 日本地震学会
雑誌
地震 第2輯 (ISSN:00371114)
巻号頁・発行日
vol.58, no.4, pp.385-399, 2006-03-31 (Released:2010-03-11)
参考文献数
19

A flight of late Holocene marine terrace fringes the central area of Puget Sound, and records uplift over an extensive area above the Seattle fault zone. The E-W trending blind thrust fault zone is a source of major seismic hazards in the Seattle metropolitan area. Gravity and seismic reflection surveys indicate a south- dipping fault plane, but its exact location and timing of past activities were unknown. LiDAR topographic mapping of the Puget lowland revealed several fault scarps on the glacial landscape hidden under the dense forest. We observed the fault, offset on the Holocene marine terrace surface and measured the former shoreline height at 97 locations using LiDAR DEM to map terrace deformation patterns and their relation to the faults. Studied areas include 1) Alki Point, 2) the southern part of Bainbridge Island, and 3) the southeastern Kitsap Peninsula near Port Orchard and southwestern Bainbridge Island. The height of the former shorelines marked by the Holocene terrace changes from ca. 10.7 to 7.3m a. s. l in the west to 12.2 to 10.1m in the east of the Toe Jam Hill fault, and 10.6 to 7.8m in the west to 9.7 to 7.9m in the east of the Waterman Point fault. These changes indicate differential uplift of the terrace surfaces across the faults. There are two newly identified faults in this study. One is the Point Glover fault that is marked by a scarp in the LiDAR map and associated 2m offset of the terrace surface. The other is the South Beach Point fault inferred by the northward tilt of the terrace surface. Because these faults strike E-W, parallel to the main Seattle Fault on its south side, and have south-facing scarps and north-dipping fault planes, they are probably back-thrsuts to the main Seattle Fault. The width of the backthrust zone is at least 4km. The age of the terraces approximately coincides with the most recent faulting event on the surface fault (at least for Toe Jam Hill Fault, ca. 1000yr BP), thus the differential uplift probably occurred simultaneously with fault movement. Although the surface backthrust scarps are less than a few kilometers long and vertical offset is 2-3m, the total amount of uplift reaches about 12m. Subtracting the effect of the vertical displacement and the amount of northward tilting, the uplift of several meters still remains on the Seattle fault zone of over about 4km wide. This broad zone of uplift is not due to the slip on the subsidiary backthrusts, but probably due to the blind thrust of the main Seattle fault. We infer that at least some of the coastal deformation is caused by broad surface upwarping above the Seattle fault and that the upwarping occurred at ca. 1000yrs BP, associated with ruptures on at least three of the backthrusts. The uplift and faulting may represent the largest earthquake in the Puget Sound area during the late Holocene.