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Ahmed青光眼阀治疗难治性青光眼:印度患眼的经验

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世界核心医学期刊文摘（眼科学分册） 2005年第8期1卷 47-48页

作者： Das J.C. chaudhuri z. Sharma P. BhomajS. 王海燕 Anand Lok Soc. Mayur Vihar Phase-1 New Delhi 110091 India

Purpose: To evaluate the efficacy of the Ahmed Glaucoma Valve implant in refra ctory glaucomas in Indian eyes. Materials and methods: A retrospective review wa s conducted on the charts of 122 eyes of 122 patients with refractory glaucoma t reated with Ahmed Glaucoma Valve implant placement at Guru Nanak Eye Centre, New Delhi between January 1996 and December 1999. The main outcome measure was success at the last follow-up. Suc cess was defined as an intraocular pressure (IOP) of 22 mmHg or less and 5 mmHg or more and at least a 30%reduction in IOP without visually devastating complic ations or additional glaucoma surgery. Results: The mean postoperative IOP (17.2 9 ±.3.79 mmHg) was significantly (P < 0.001) lower than the mean preoperative I OP (31.47 ±7.86 mmHg) at last follow up (mean 12.51 ±.8.37 months; range 3-24 months). The cumulative probability of success by Kaplan Meier analysis was 85. 95%at 12 months and 82.83%at 24 months. The mean number of postoperative antig laucoma medications (0.75 ±.0.80) was also significantly lower (P< 0.001) than the mean preoperative number of antiglaucoma medications (2.83±0.72). The most common complication was corneal-tube contact, which occurred in five (4.10%) e yes. Retinal detachment occurred postoperatively in one eye with the clinical di agnosis of neovascular glaucoma secondary to Eale’s disease. Two patients had t ube extrusion requiring repositioning and reinforcement with scleral patch graft . Conclusions: Ahmed Glaucoma Valve implantation is an effective and relatively safe therapy for the treatment of refractory glaucoma in Indians.

关键词：难治性青光眼 Ahmed 青光眼手术植管视功能眼内压抗青光眼药物视网膜脱离末次随访眼科中心

Effect of anisotropy on thermoelastic contact problem

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Applied Mathematics and Mechanics(English Edition) 2008年第4期29卷 501-510页

作者： Sakti Pada Barik M.Kanoria P.K.chaudhuri Departmemt of Mathematics Gobardanga Hindu CollegeKhantura24-Parganas(N)West BengalIndia Department of Applied Mathematics University of Calcutta92A.P.C.RoadKolkata-700009India

This paper is concerned with the stationary plane contact of an insulated rigid punch and a half-space which is elastically anisotropic but thermally conducting. The frictional heat generation inside the contact region due to the sliding of the punch over the half-space surface and the heat radiation outside the contact region are taken into account. With the help of Fourier integral transform, the problem is reduced to a system of two singular integral equations. The equations are solved numerically by using Gauss-Jacobi and trapez.idal-rule quadratures. The effects of anisotropy and thermal effects are shown graphically.

关键词： transversely isotropic medium Fourier transform frictional heating punch heat radiation singular integral equation Fredholm integral equation

TORSIONAL OSCILLATION OF RIGID DISK IN INFINITE TRANSVERSELY ISOTROPIC ELASTIC CYLINDER

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Applied Mathematics and Mechanics(English Edition) 2006年第7期27卷 911-917页

作者： Sakti Pada Barik Mridula Kanoria P.K.chaudhuri Department of Applied Mathematics University of Calcutta 92 A.P.C. Road Kolkata-700 009 India

In the present analysis torsional oscillation of a rigid disk in an infinite transversely isotropic elastic cylinder is considered. The effects of anisotropy in the stress intensity factor are shown graphically.

关键词： torsional oscillation transversely isotropic material dual integral equation Fredholm integral equation contour integration

Impact of surface phase coexistence on the development of step-free areas on Si（111）

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Frontiers of Materials Science 2015年第2期9卷 141-146页

作者： Andreas FISSEL Ayan Roy chaudhuri Jan KRUGENER Philipp GRIBISCH H. Jorg OSTEN Institute of Electronic Materials and Devices Leibniz University Hannover Schneiderberg 32 30167 Hannover Germany

The step-flow growth condition of Si on Si（111） near the （7×7）-＂1×1＂ surface phase transition temperature Tc are analyz.d within the framework of Burton- Cabrera-Frank theory. In particular, coexistence of both surface phases well below Tc and their specific influence on the step-flow growth behavior are considered. We presume that under dynamical condition of growth, the surface initially covered by only the （7×7） phase separates into domains surrounded by ＂1×1＂ areas. On such a surface, the overall supersaturation should be reduced drastically compared to a surface with only （7×7）, resulting in much larger critical terrace width for nucleation.

关键词： molecular beam epitaxy step-flow growth mode surface superstructure silicon

Guided Modes of Hollow Optical Fiber Based Components: Analytical Solutions

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光学学报 2003年第S1期23卷 159-160页

作者： P. Roy chaudhuri C. Lu W. Xiaoyan Institute for Infocomm Research Unit 230 Innovation Centre Block 2 18 Nanyang Drive Singapore 637723Institute for Infocomm Research Unit 230 Innovation Centre Block 2 18 Nanyang Drive Singapore 637723 School of Electrical and Electronics Engineering Nanyang Technological University Singapore 639798.School of Electrical and Electronics Engineering Nanyang Technological University Singapore 639798.

Guided modes in a hollow optical fiber are investigated using both scalar approximation and exact vectorial analysis. Effective indices of modes are seen to exhibit "nearly degenerate" groups. Besides providing an insight of modal characteristics, the analysis would prove to be useful to define design parameters for realiz.ng components based on these fibers, and to explore new possibilities.

关键词： mode in on for of Guided Modes of Hollow Optical Fiber Based Components Analytical Solutions