نتایج جستجو برای: star track
تعداد نتایج: 139036 فیلتر نتایج به سال:
During the study for the dimensioning as well as the selection of the individual materials constituting a railway track, the ballast and the substructure present residual deformations, directly related to the deterioration of the geometry of the track. The slighter the residual deformations and the slower their alteration over time is, the better the quality of the track. The actions acting ...
High mass X-Ray binaries (HMXBs) are two body systems that consist of a nuclear burning star accreting matter onto a compact object (CO) such as a neutron star (NS) or black hole (BH). Stellar material from the donor heats up as it falls into the deep potential well of the accretor, emitting blackbody radiation with a characteristic X-Ray spectrum. There are two separate processes through which...
درگیاه اطلسی، خودناسازگاری توسط گلیکوپروتئینهای خامهای کنترل میشود. این گلیکوپروتئینها دارای فعالیت ریبونوکلئازی میباشند. در این مطالعه، پس از گرده افشانی مادگی رقم زراعی خودناسازگار bravo purple star و رقم زراعی خودسازگار bravo cool water mix اطلسی با گرده های خودی و غیرخودی، فعالیت ریبونوکلئازهای خامه به روش اسپکتروفتومتری و ایزوآنزیمهای ریبونوکلئازهای خامه به روش page مورد بررسی قرار گرفت...
There are several factors causing fastening systems to deteriorate faster than the designed life. The high repetitive loads from a moving train being one of the main factors, track irregularities, design and installation defects of track components, non-uniform rail support stiffness, unevenness in the rail seat deterioration are some of the factors causing fastenings systems to deteriorate fas...
The relative distribution of molecular gas and star formation in galaxies gives insight into the physical processes timescales cycle between stars. In this work, we track spatial configuration CO H$\alpha$ emission at high resolution each our galaxy targets, use these measurements to quantify distributions regions different evolutionary stages formation: from without traced by star-forming gas,...
Nowadays natural compounds are increasingly used in various fields since they cause fewer adverse side effects than their chemical counterparts. In addition, preparation and production of natural compounds are comparatively simple. The present study aimed to evaluate the anti-cancer effects of brittle star methanol extract on MCF-7 cells. Anti-cancer effects of brittle star methanol extract wer...
abstract: ballasted railway track are of the most common types of railway in our country. the aim of this paper is study of three-dimensional suitable model for railway ballasted track and dynamic analysis of that using numerical runge-kutta 4th order method. after the dynamic analysis is performed the responses related to railway components are determined. to analyze the effect of passing rail...
in recent years, researchers have become interested in examining the effect of pettlep imagery on motor performance and how pettlep imagery can improve the performance. the aim of this study was to compare the effect of pettlep imagery and balance practice on dynamic balance in the elderly. participants were 42 male elderly in arak city. they were divided into 4 groups based on the scores of dy...
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