Extracorporeal shock wave lithotripsy of urolithiasis

A total of 159 patients underwent 194 treatments with extracorporeal shock-wave lithotripsy for upper urinary tract calculi between August 4 and November 30, 1986. A single treatment was performed in 76% of the patients with renal stones and 90% of the patients with ureteral stones. Treatment was successful in 153 patients (93%). Seventy percent of the patients with renal stones and 95% of those with ureteral stones were stone-free over the one-month follow-up, while about 15% had small and asymptomatic fragments believed to be passable spontaneously. Only one patient required surgical removal of the calculi due to severe ureteral edema. Adjunctive urological management is required in about 9% of the patients preoperatively or postoperatively. The period of hospitalization averaged about 11 days after treatment and patients usually returned to work within a few days after their discharge. Extracorporeal shock-wave lithotripsy is the preferred form of management for symptomatic ureteral and renal calculi

Clinical statistics on the patients operated at the Department of Urology, Kinki University Hospital during three years from 1987 to 1989

A statistic survey was made on the patients undergoing operations between January, 1987 and December, 1989

スギ間伐材を用いた配向性パーティクルボードに関する研究(第 3 報) : ボードの材質に及ぼす接着剤の添加量の影響(林学部門)

スギ間伐材からストランド・パーティクルを作製し, 接着剤としてユリア樹脂(UF), メラミン・ユリア共縮合樹脂(UMF), フェノール樹脂(PF)およびイソシアネート樹脂(IC)の4種類, 含脂率を3,5,10,15%の4水準に設定して配向性およびランダムに配向させた12mm厚の単層ボードを製造した。配向性ボードの平均配向角は約10度であった。いずれのボードともに, また配向性およびランダムボードともに, 曲げ性能およびはく離強度は含脂率が増加するとともにほぼ直線的に増加した。また常態曲げ性能は, 接着剤が異なってもそれほど大きな差異はない。また, 配向性ボードの平行方向の曲げ強度は, ランダムボードのそれの約2倍, 配向性ボードの異方度は約5∿6である。いずれの接着剤の場合も, また配向性およびランダムボードともに, 厚さ膨張率は含脂率の増加とともに減少する傾向を示し, ICボードの寸法安定性が良好であった。配向性ボードの平行方向の吸湿板面寸法変化率は0.02∿0.09%の範囲にあり, 供試接着剤の種類や含脂率にはあまり影響されない。また, ランダムボードのそれは0.05∿0.11%, 配向性ボードの直交方向のそれは0.52∿1.02%であり, 含脂率の増加とともにやや寸法変化率が減少する傾向がみられた。Strand particles were oriented using a mechanical orienter, and single-layer oriented particleboards (OSB) were produced. The effect of resin content on bending properties and dimensional stability of the boards were investigated. Resins used were urea, melamine-urea, phenol and isocyanate. The bending strength in the oriented direction of the boards was about twice that of the random boards. The value of the parallel to perpendicular (∥/⊥) ratio for the bending properties reached approximately 5 to 6. The bending properties and internal bond strength were affected greatly by resin content. The thickness swelling of the boards was decreased with increasing resin content. The value of linear expansion (LE) in the oriented direction was about half of the value in the random boards. The value of LE decreased slightly with increasing resin content

明视条件下人眼对低频间断光的亮度感觉

本实验是以异色亮度匹配方法,探索视觉系统对在明视觉水平上的低频、不同时间调制的单色光和白光的亮度感觉特性。结果发现,闪光刺激在临界频率以上作用于视觉系统所产生的亮度感觉是遵循塔耳玻特-普拉托定律。而对在临界频率以下亮暗比为4/1的间断单色光刺激所需的周期平均亮度低于恒定单色光所需的亮度幅度,这表明塔耳玻特(Talbort)定律不适用于低频、高亮暗比的间断单色光。仅适用于间断单色光刺激的亮暗比低于1,波长为650纳米的间断单色光。</p

复合光视亮度效率的研究

采用视亮度匹配法获得了21名中国人眼的平均明视觉等价亮度、视亮度与亮度之比B/L值,并理出每个人的数据。视场角为10°,参考白光的网膜照度分别取为100、10、1、0.1和0.01Td

中国人眼对物体色的视觉特性研究

本文对人眼对物体各种颜色视觉的反映进行了研究，并得出了具体数据

采用异色视亮度匹配法测量明视觉光效率函数

本文介绍采用异色视亮度匹配法,用A光源照明,在2°和10°视场条件下测量明视觉光效率函数V(λ)的实验装置、方法及结果。观察者中有汉族、朝鲜族和哈萨克族,测量结果无明显差异。在2°视场条件下对16名观察者测得的V(λ)值与国外9个实验室对37名观察者的平均值相符