نتایج جستجو برای: reaching its maximum at
تعداد نتایج: 5148094 فیلتر نتایج به سال:
In this paper, the influence of heat treatment on PH17-7 stainless steel spring was evaluated. Precipitation hardening phenomenon of PH 17-7 steel was evaluated in three stages. First, the spring constant changes with time and temperature was evaluated. Second, the spring constant changes with respect to its original length at constant temperature and time with blocking (spring length aft...
Successfully performing a given behavior requires flexibility in both perception and behavior. In particular, doing so requires perceiving whether that behavior is possible across the variety of contexts in which it might be performed. Three experiments investigated how (changes in) context (ie point of observation and intended reaching task) influenced perception of maximum reaching height. Th...
روش های مولکولی ابزارهای مهم وقوی در ارزیابی روابط خویشاوندی، تنوع ژنتیکی و شناسایی گونه های گیاهی می باشد. مهمترین توالی های مولکولی برای مطالعات فیلوژنتیکی در سطوح جنس و گونه ناحیه its ژن های dna s26 –s 8/5 –s 18 ریبوزومی هسته می باشد. از نکته نظر تاکسونومیکی یک مشکل بزرگ این جنس خویشاوندی نزدیک بین گونه هاست و بیشتر آنها به وسیله ی فرم های حدواسط که احتمالا منشا هیبرید دارند ابهام دار هستند....
the present thesis is a study of postmodern historical novel with respect to the voice of women. according to postmodern historiography,the established institution of history is one of the other manifestations of patriarchys power which has silenced women. the study analyzes angela carters nights at the circus as a postmodern historical novel which makes its female characters transgress the pat...
We present new near-infrared speckle interferometric observations of the young stellar object Elias 1. The emission is resolved into a narrow east-west elongated blue halo (FWHM about 0. ′′2x1. ′′0) and an unresolved core (FWHM < 0. ′′2). Previously, Kataza and Maihara (1991) had inferred an east-west elongated optically thin disk within which the NIR light is directly scattered. Adding new pie...
A prototype thermionic electron gun for a high-brightness X-ray generator has been developed. Its extraction voltage and design current are 60 kV and 100 mA (DC), respectively. The X-ray generator aims towards a maximum brilliance of 60 kW mm(-2). The beam sizes at the rotating anticathode must therefore be within 1.0 mm x 0.1 mm and a small beam emittance is required. The fabricated electron g...
A precise test of the theory of stellar evolution can be performed by measuring the difference in average energy between the neutrino line produced by Be electron capture in the solar interior and the corresponding neutrino line produced in a terrestrial laboratory. The high temperatures in the center of the sun broaden the line asymmetrically, FWHM = 1.6 keV, and cause an average energy shift ...
We designed, fabricated, and characterized a dielectric metamaterial lens created by varying the density of subwavelength low refractive index nanoholes in a high refractive index substrate, resulting in a locally variable effective refraction index. It is shown that a constructed graded index lens can overcome diffraction effects even when the aperture/wavelength (D/λ) ratio is smaller than 40...
A growing number of X-ray sources based on the free-electron laser (XFEL) principle are presently under construction or have recently started operation. The intense, ultrashort pulses of these sources will enable new insights in many different fields of science. A key problem is to provide x-ray optical elements capable of collecting the largest possible fraction of the radiation and to focus i...
A precise test of the theory of stellar evolution can be performed by measuring the diierence in average energy between the neutrino line produced by 7 Be electron capture in the solar interior and the corresponding neutrino line produced in a terrestrial laboratory. The high temperatures in the center of the sun broaden the line asymmetrically, FWHM = 1.6 keV, and cause an average energy shift...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید