منابع مشابه
Plastic Wave Propagation Model for Perforation of Metallic Plates by Blunt Projectiles
In this paper, a six-stage interactive model is presented for the perforation of metallic plates using blunt deformable projectiles when plastic wave propagation in both target and projectile is considered. In this analytical model, it is assumed that the projectile and target materials are rigid – plastic linear work hardened. The penetration of the projectile into the target is divided into s...
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he future of laser refractive surgery is exciting with the potential for ever-improved postoper-ative visual performance. In the past, the operative goal has been 20/20 uncorrected visual acuity with zero residual refractive error. Criteria for a successful procedure are no longer 20/40 or better with ±1.00 diopter (D) of residual refractive error, because neither surgeons nor patients are sati...
متن کاملThe cornea is not a piece of plastic.
To the Editor: In her recent editorial (Roberts C. The cornea is not a piece of plastic. J Refract Surg 2000;16:407-413), Dr. Roberts points out that biomechanical flattening enhances a myopic excimer laser ablation and works against a hyperopic ablation. Would the circular severing of corneal lamellae in hyperopic ablation not lead to a contraction of the central part of these lamellae with a ...
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OBJECTIVES For years, limiting operative wound sepsis and its resultant morbidity in patients with small bowel perforations has been a major headache for surgeons. The present study was intended to extend the benefits of minimally invasive surgery to traumatic and typhoid small bowel perforations, in terms of assessing its feasibility and limiting wound sepsis. METHODS Twenty-five patients (2...
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A 39-year-old woman was admitted to our shock trauma centre for the management of abdominal and thoracic trauma caused by penetrating gunshot wounds. Thoracic and abdominal computed tomography showed multiple fractures of the spleen and hemoperitoneum, a small lesion of the upper left kidney, a fracture of the eleventh left rib and a diaphragmatic injury. Forty minutes after admission to the ho...
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ژورنال
عنوان ژورنال: Proceedings of the Royal Society of Medicine
سال: 1926
ISSN: 0035-9157
DOI: 10.1177/003591572601901834