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shahjavan--yasamin
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Finitely generated subnormal subgroups of GLn(D) are central
, Article Journal of Algebra ; Volume 225, Issue 2 , 2000 , Pages 517-521 ; 00218693 (ISSN) ; Mahmudi, M. G ; Yasamin, S ; Sharif University of Technology
Academic Press Inc
2000
Abstract
Let D be an infinite division algebra of finite dimension over its center. Assume that N is a subnormal subgroup of GLn(D) with n≥1. It is shown that if N is finitely generated, then N is central. © 2000 Academic Press
Numerical and Experimental Investigation of the Effect of Cement Mantle Thickness between the Stem and the Femoral Cone in Revision Total Knee Arthroplasty
, M.Sc. Thesis Sharif University of Technology ; Farahmand, Farzam (Supervisor) ; Naserkhaki, Sadegh (Co-Supervisor)
Abstract
Revision total knee arthroplasty (rTKA) is recognized as one of the most challenging orthopedic surgeries due to extensive bone loss and compromised stability of the primary implant. The use of porous metaphyseal cones as substitutes for lost bone segments has emerged as an effective strategy to enhance implant stability. However, the optimal design of these cones—particularly the maximum allowable thickness of the cement mantle between the cone and the implant stem—has a direct impact on the biomechanical performance and long-term stability of the implant. Excessive cement thickness can lead to high shrinkage during polymerization, reduced implant-cement interface integrity, and increased...