http://hdl.handle.net/11133/109 1987-03 Tue, 14 Apr 2026 15:22:25 GMT 2026-04-14T15:22:25Z http://hdl.handle.net/11133/766 タイトル: 製紙工場排出粉じんによる屋根瓦の腐蝕とその機構に関する基礎科学的研究(第1報) 著者: 佐野, 惈; 太田, 洋; 坪井, 勇 抄録: It had happened several decades gao in Kasugai city (Aichi prefecture) that roof-tiles (particularly, of smoking finish type) of the houses in the vicinity of a paper-mill corroded perceptibly; this episode made itself a nuisance to become the target of criticism. Thus, various studies had been started in 1964 and carried on till recently. The outline of the present report is as follows : It was found by chemical analysis that the corroded tiles contain Na_2SO_4 in an amount much larger compared to those of NaCl, Na_2CO_3 and others, suggesting such a corrosion mechanism that dust (say, of Na_2SO_4) emitted by the mill might fall upon tiles, penetrate into them if dissolved in rain-water and, in times, could crystallize there, displaying a destructive action against tiles. Another study had also been in progress : three huts of tiled roof were built within 1.5km at the farthest around the mill and allowed to stand idle for 12 years. The results so obtained is that the tiles near the mill got rich in Na_2SO_4,whereas those 1.5km distant suffered no change. Based on these findings, we have derived the equations (9) and (10) relating the Na^+ and SO_4^<2-> contents of a tile to the amount of dust falling onto it throughout the period of standing. Mon, 30 Mar 1987 15:00:00 GMT http://hdl.handle.net/11133/766 1987-03-30T15:00:00Z http://hdl.handle.net/11133/767 タイトル: 2光束レーザ干渉法による超精密段差膜厚測定 著者: 内田, 悦行; 赤尾, 保男 抄録: Two new methods for thin film thickness measurement are described. The first method makes use of a polarization interferometer and the second method utilizes a double twin path interferometer. These methods are highly precise and can be used for research and development required for the evaluation of various lithographic processes. The polarization interferometer was found to possess excellent linearity and very high sensitivity 0.1nm. This was achieved by using a Rochon prism as a beam splitter-recombiner. Aluminium films with thickness ranging from 70nm to 300nm were measured under normal laboratory conditions, with a precision better than ±30nm. In the double twin path interferometer, a grating beam splitter-recombiner was used to maintain the reference surface level constant. Actual thickness measurements of aluminium films with thickness ranging from 70nm to 300nm shown a maximun error of about ±20nm. Remedies for an improvement of the precision are discussed. Mon, 30 Mar 1987 15:00:00 GMT http://hdl.handle.net/11133/767 1987-03-30T15:00:00Z http://hdl.handle.net/11133/768 タイトル: 総合地震危険度評価法に関する研究 (その2) : 総合危険度評価に基づく地震災害の低減 著者: 谷口, 仁士; 飯田, 汲事 抄録: This study is each composed of the part 1 and 2. In the part 1 of this study was previously published in 1986. The authors were described the mechanism of damage occurrence and estimation method of earthquake damage in the study of part 1. The prenent paper, part 2,described the preventive measures based on the damage estimation result in Nagoya city for the case study. Three types of earthquake damage are estimated in Nagoya city. One of them is the totally destroyed wooden houses caused by the strong ground motion, liquefaction and man-made ground area. Second one is the fire damage such as outbreak and its spreading fire damage. Last one is the human damage such as loss of life. The comprehensive seismic risk in Nagoya is assessed on the basis of addition to the various damages mentiond above. Mon, 30 Mar 1987 15:00:00 GMT http://hdl.handle.net/11133/768 1987-03-30T15:00:00Z http://hdl.handle.net/11133/763 タイトル: クリープによる鉄筋コンクリート柱の安定性解析 著者: 張, 恒平; 青木, 徹彦; 猪股, 俊司 抄録: In this paper the second-order effect is evaluated by taking into account th influence of creep correnponding to the working loads. The moment-curvature relations at time t are calculated from the equilibrium equations for axial load and moment, and the assumption of linear strain distribution (plane-section assumption). In this case, the stress-strain diagram for concrete is modified by multiplying the short-term strains by a factor (1+φ), in order to take account the effect of creep. A program for determining N-M-1/R relationships is developed, and a rational approach is proposed to investigate the creep stability failure of reinforced concrete columns. Mon, 30 Mar 1987 15:00:00 GMT http://hdl.handle.net/11133/763 1987-03-30T15:00:00Z