نتایج جستجو برای: 90°n
تعداد نتایج: 33 فیلتر نتایج به سال:
A recent variational mechanics analysis of microcracking damage in cross-ply laminates of the form [(S)/90n]s, where (S) is any orthotropic sublaminate much stiffer than [90n], has been extended to account for the presence of delaminations emanating from the tips of microcracks in the [902n]T sublaminate. The new two-dimensional stress analysis is used to calculate the total strain energy, effe...
This study explores the effect of size scaling and stacking sequence on quasi-static tensile behavior [90/0]ns sublaminate-level [90n/0n]s ply-level scaled glass/epoxy laminates. Test results showed that unnotched strengths both specimens were comparable for a given factor, even though suffered extensive delamination between 90n 0n ply blocks. In contrast, open hole (OHT) strength was reduced w...
OBJECTIVE The aim of the study reported here was to evaluate the performance of a self-adhesive flowable composite and two self-etching adhesive systems, when subjected to cyclic loading, in preventing the nanoleakage of Class V restorations. METHODS Wedge-shape Class V cavities were prepared (4×2×2 mm [length × width × depth]) on the buccal surfaces of 90 sound human premolars. Cavities were...
Abstract Wear of seal materials is a widespread problem in the aerospace, petrochemical, and electric power fields, leading not only to low efficiency mechanical equipment, but also increased energy consumption reduced safety performance. Therefore, this paper establishes SCA-wear model based on tensile constraint algorithm calculate analyze friction wear performance materials. The coefficients...
HIV-1 envelope glycoprotein (Env) is the sole target for broadly neutralizing antibodies (bnAbs) and the focus for design of an antibody-based HIV vaccine. The Env trimer is covered by ∼90N-linked glycans, which shield the underlying protein from immune surveillance. bNAbs to HIV develop during infection, with many showing dependence on glycans for binding to Env. The ability to routinely asses...
In a previous paper, París et al [1], the authors proposed physically based explanation (without employing fitting parameters) of scale effect in composites, which gave new insight on in-situ strength concept. The was identification mechanisms damage involved “failure” layer, application Linear Elastic Fracture Mechanics to these mechanisms, predictions obtained from models reproducing and some...
The high-density gastroretentive dosage forms was made a theophylline tablets 250 mg by wet granulation method in three formulas with combine the polymer concentration. used sodium alginate and PVP K30, where 1st formula ratio of alginate: K30 (18.75%: 5%), 2nd 2, 5%) 3th (12.5%: 2.5%). third were evaluated weight uniformity test, size hardness drug content vitro release as well determination k...
زمینه و هدف: بیماریهای قلبی عروقی اولین عامل مرگ ومیر در ایران شناخته شده که می تواند بار بهداشتی، اجتماعی و اقتصادی عظیمی را بر جامعه تحمیل کند. خودمراقبتی، یکی از جنبه های مهم درمان دربیماران مبتلا به نارسایی قلبی است. لازم است که آموزش خودمراقبتی غیر دارویی، قسمتی از برنامه درمانی روزانه این بیماران در بیمارستانها و مراکز بهداشتی درمانی باشد. لذا مطالعه حاضر با هدف تعیین تاثیر مداخله آموزش...
Let G be a graph with no three independent vertices. How many edges of G can be packed with edge-disjoint copies of Kk? More specifically, let fk(n,m) be the largest integer t such that for any graph with n vertices, m edges, and independence number 2, at least t edges can be packed with edge-disjoint copies ofKk. Turán’s Theorem together with Wilson’s Theorem assert that fk(n,m) = (1−o(1)) 2 4...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید