نتایج جستجو برای: circular

تعداد نتایج: 67689  

A. Zarasvandi G. Mirzababaei J. Shahabpour S. M. Hayatolgheyb

Structural analysis of remotely sensed data provides a method of assessing the structural significance of regional metallogenesis in the Dehaj area as the northwestern part of the Kerman porphyry Cu belt. This belt is consisted of dominant Eocene volcanics and the Dehaj type subvolcanic intrusives. In the study area, geologically, Cu-mineralization is hosted by the Kuh-e-Panj type subvolcanic i...

1998
J. L. Han G. J. Qiao

We present a systematic study of the circular polarization in pulsar integrated profiles, based on published polarization data. For core components, we find no significant correlation between the sense-change of circular polarization and the sense of linear position angle variation. Circular polarization is not restricted to core components and, in some cases, reversals of circular polarization...

Journal: :journal of solid mechanics 0
a behravan rad engineering department ,zamyad company,15km karaj old road, p.o 1386183741, tehran, iran

present paper is devoted to stress and deformation analyses of heated variable thickness functionally graded (fg) circular plate with clamped supported, embedded on a gradient elastic foundation and subjected to non-uniform transverse load. the plate is coupled by an elastic medium which is simulated as a winkler- pasternak foundation with gradient coefficients in the radial and circumferential...

Journal: :آب و خاک 0
کاظم اسماعیلی بنیامین نقوی فاطمه کورش وحید جعفر یزدی

abstract weirs are the most common structures for discharge measurement in engineering research. streamline curvature, non hydrostatic pressure distribution on weir and nappe adherence to the weir lead to differences between calculated and measured discharges. thus discharge coefficient, which is the ratio of real and theoretic discharges, is usually less than unity. in circular weirs the press...

Journal: :the iranian journal of pharmaceutical research 0
neda eslami 1- department of pharmaceutics, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran. 2- department of biology, school of sciences, alzahra university of basic sciences, tehran, iran. rouha kasra kermanshahi department of biology, school of sciences, alzahra university of basic sciences, tehran, iran. mohammad erfan department of pharmaceutics, school of pharmacy, shahid beheshti university of medical sciences, tehran, iran.

crystalline arrays of proteinaceous subunits forming surface layers (s-layers) are now recognized as one of the most common outermost cell envelope components of prokaryotic organisms. the surface layer protein of lactobacillus acidophilus atcc4356 is composed of a single species of protein of apparent molecular weight of 43-46 kda. considering the lactobacillus acidophilus atcc4356 having the ...

Journal: :علوم و تکنولوژی پلیمر 0
محمود مهرداد شکریه حسین توزنده جانی مجید جمال امیدی

composites materials are widely used because of their high specific stiffness and strength. although the methods and techniques of designing these materials are well developed, however, the research on the behavior of these materials under impact and dynamic loadings are still under progress. in this article the crushing and energy absorption of composite tubes under axial dynamic loadings are ...

2009
Ramu Pillalamarri Jyoti Ranjan Panda Rakhesh Singh Kshetrimayum

In this paper, we have investigated printed monopole antennas, which is basically printed microstrip antenna with etched ground plane for UWB applications. In particular, we have simulated two types of UWB printed monopole antennas: circular and modified circular disk monopole antennas. Simple rectangular microstrip lines are used for feeding the printed monopole antennas. This UWB monopole ant...

2007
Laura Elena Chávez Ladislav Stacho Luis Goddyn

This thesis considers circular flow-type and circular chromatic-type parameters (φ and χ, respectively) for matroids. In particular we focus on orientable matroids and 6 √ 1-matroids. These parameters are obtained via two approaches: algebraic and orientation-based. The general questions we discuss are: bounds for flow number; characterizations of Eulerian and bipartite matroids; and possible c...

2001
A. Bombardi

In the UxLa1−xS system there is an abrupt loss of the long-range ferromagnetic ordering found in pure US at a critical concentration xc ∼ 0.57, which is far above the percolation limit. As the magnetic ground state in such a system can be strongly affected by small variations of the 5f localization, we have investigated a set of samples with different x by polarized neutron diffraction and X-ra...

2010
M. Fonin

We present systematic investigations of the electronic and magnetic properties of the graphenel Ni( Ill) system by means of x-ray absorption spectroscopy (XAS) and magnetic circular dichroi sm (XMCD) at the Ni L2,3 and C K absorption edges. The XAS CIs -> 1/'* , u* spectra show dramatic changes as the angle, il', between the electrical vector of light and normal of the sample is varied reflecti...

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