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タイトル: 真空内微小液滴への重イオン照射システムの開発: 重イオン誘起反応の質量分析学的研究著者: 間嶋, 拓也抄録: A new experimental system that enables mass spectrometric studies of secondary ions emitted from microdroplet surfaces has been developed to investigate the complex reaction processes included by MeV-energy heavy ions on liquid surfaces. In particular, coincidence measurements with forward-scattered ions provide and negative secondary ions. In addition, the penetration length of projectile ions in droplet targets was evaluated from the amount of energy loss of the forward-scattered ions. The results propose the existence of unknown “submicron effects”, such as a variation in the mass distribution and kinetic energy of secondary ions in the submicron scale. This review article presents a detail of the experimental system and examples of the results demonstrated with ethanol droplets.

タイトル: 子宮体癌IA期に対するロボット支援下手術の手術成績に関する後方視的検討著者: 千草, 義継; 兪, 沙英; 堀川, 直城; 岡本, 葉留子; 砂田, 真澄; 浮田, 真沙世; 山ノ井, 康二; 山口, 建; 堀江, 昭史; 万代, 昌紀抄録: Objective: This study aimed to analyze the surgical outcomes of robotic-assisted surgery for early-stage endometrial cancer compared with those of laparoscopic surgery and laparotomy. Methods: The clinical data and perioperative outcomes of stage IA endometrial cancer patients who underwent total hysterectomy, bilateral salpingo-oophrectomy, and pelvic lymphadenectomy by robotic-assisted surgery, laparoscopic surgery or laparotomy from January 2011 through December 2020 were reviewed and analyzed retrospectively. Results: A total of 122 patients were eligible (robotic-assisted surgery, n=24; laparoscopic surgery, n=72; laparotomy, n=26). The median operation time for robotic-assisted surgery was lon ...

2020年11月の月間アクセスランキングを掲載しました。

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2020年12月の特集「WARPで振り返る2020年」を掲載しました。

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2020年11月の特集「宇宙開発」を掲載しました。

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タイトル: Mechanical Amorphization of Synthetic Fault Gouges During Rotary-Shear Friction Experiments at Subseismic to Seismic Slip Velocities著者: Kaneki, S.; Oohashi, K.; Hirono, T.; Noda, H.抄録: Although the effects of mechanical amorphization by fault motion on fault rocks have been investigated both in nature and experiments, the relationship between slip processes and the amount of amorphous materials produced remains unclear. We performed rotary-shear friction experiments on synthetic quartz and kaolinite gouges at room temperature, normal stresses of 1 or 3 MPa, slip velocities of 0.001 or 1 m s⁻¹, and displacements of 1–101 m. X-ray diffraction and microscopic observation data revealed that mechanical amorphization in both materials was accompanied by grain-size reduction, particle rounding, and the formation of ultrafine particles. The amount of amorphous materials produced was strongly dependent on mineralogy and total frictional work regardless of slip velocit ...

2020年10月の特集「こんな所にWARPへのリンク」を掲載しました。