نتایج جستجو برای: asymmetric 1

تعداد نتایج: 2804417  

Journal: :civil engineering infrastructures journal 0
seyed bahram beheshti-aval assisstant professor, civil engineering faculty, k.n.toosi university of technology, tehran, iran. sara keshani m.sc. earthquake engineering, civil engineering faculty, k.n.toosi university of technology, tehran, iran.

torsion of many symmetric structures, which were designed based on the seismic codes, is due to their asymmetricity induced during inelastic behavior. although the structure was designed symmetrically assuming elastic based criteria, different factors such as material inconsistency in structure, construction details discrepancy and construction errors may result in asymmetric behavior in inelas...

A. R Golkarian M Jabbarzadeh, Sh Dastjerdi

This study is the first report of numerical solution of nonlinear bending analysis for annular and circular plates based on 3D elasticity theory with asymmetric boundary conditions using semi-analytical polynomial method (SAPM). Orthotropic annular and circular plates are subjected to transverse loading and 3D bending analysis in the presence of symmetric and asymmetric boundary conditions is s...

Journal: :iranian journal of radiation research 0
m.n. anjum a. qadir m. afzal

background: the dosimetric performance of eclipse 6.5 three dimensional treatment planning system (3dtps) is evaluated by comparing the calculated and measured dose in two dimensions following the guide lines of american association for physicists in medicine task group 53. materials and methods: the calculations were performed by the 3dtps for symmetric as well as asymmetric fields for standar...

2009
Salah A. Aly

It is recently conjectured that phase-shift errors occur with high probability than qubitflip errors, hence phase-shift errors are more disturbing to quantum information than qubit-flip errors. This leads to construct asymmetric quantum error-correcting codes (AQEC) to protect quantum information over asymmetric channels, PrZ ≥ PrX. In this paper we present two generic methods to derive asymmet...

Journal: :Current Biology 2014
Sylvain Loubéry Carole Seum Ana Moraleda Alicia Daeden Maximilian Fürthauer Marcos Gonzalez-Gaitan

Cell fate decision during asymmetric division is mediated by the biased partition of cell fate determinants during mitosis [1-6]. In the case of the asymmetric division of the fly sensory organ precursor cells, directed Notch signaling from pIIb to the pIIa daughter endows pIIa with its distinct fate [1-6]. We have previously shown that Notch/Delta molecules internalized in the mother cell traf...

2017
Runjun Devi Sajal Kumar Das

While the exploitation of the Sharpless asymmetric dihydroxylation as the source of chirality in the synthesis of acyclic molecules and saturated heterocycles has been tremendous, its synthetic utility toward chiral benzo-annulated heterocycles is relatively limited. Thus, in the search for wider applications of Sharpless asymmetric dihydroxylation-derived diols for the synthesis of benzo-annul...

Journal: :Development 2008
Yoshiyasu Ishimaru Tomoko Komatsu Megumi Kasahara Yuko Katoh-Fukui Hidesato Ogawa Yoshiro Toyama Mamiko Maekawa Kiyotaka Toshimori Roshantha A S Chandraratna Ken-ichirou Morohashi Hidefumi Yoshioka

In most animals, the gonads develop symmetrically, but most birds develop only a left ovary. A possible role for estrogen in this asymmetric ovarian development has been proposed in the chick, but the mechanism underlying this process is largely unknown. Here, we identify the molecular mechanism responsible for this ovarian asymmetry. Asymmetric PITX2 expression in the left presumptive gonad le...

2004
Herbert C. Brown

Chiral organoboranes, readily available via asymmetric hydroboration or the Matteson asymmetric homologation reaction, have been successfully utilized for a general asymmetric synthesis of pure enantiomers. The recent continued successes achieved in our three-pronged approach to asymmetric synthesis (1) asymmetric hydroboration, (2) asymmetric reduction, and (3) asymmetric allyland crotylborati...

Journal: Money and Economy 2016

The main goal of the present study is testing asymmetric risk pricing and comparing it with pricing of traditional risk measures in Tehran Stock Market. Accordingly, a sample consisting of 101 companies listed in Tehran Stock Market during 2002-2013 went under investigation. In order to test asymmetric risk pricing, regression model of panel data was applied. The results revealed a positive and...

2007
JUNCHENG WEI

In this paper, we rigorously prove the existence and stability of asymmetric spotty patterns for the Gray-Scott model in a bounded two dimensional domain. We show that given any two positive integers k 1 ; k 2 , there are asymmetric solutions with k 1 large spots (type A) and k 2 small spots (type B). We also give conditions for their location and calculate their heights. Most of these asymmetr...

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