نتایج جستجو برای: gamma index
تعداد نتایج: 515104 فیلتر نتایج به سال:
شهرهایی که در دامنه های کوهستانی شکل گرفته اند به شدت تحت تاثیر محیط فعال پیرامون خود قرار گرفته و به وسیله مخاطرات ژیومورفولوژیکی موجود در آن مورد تهدید قرار می گیرند. شهر جوانرود به دلیل قرارگیری در پاپکوهای زاگرس چین خورده و نیز به دلیل گذر روخانه فصلی و دایمی سوریر در شرق و لیله در جنوب شهر دارای مخاطرات محیطی مختلف از جمله حرکات دامنه ای و سیل و طغیان رودخانه می باشد. در تحقق حاضر به منظور...
In current theoretical models of the blazar subclass of active galaxies, the broadband emission consists of two components: a low-frequency synchrotron component with a peak in the IR to X-ray band, and a high-frequency inverse Compton component with a peak in the gamma-ray band. In such models, the gamma-ray spectral index should be correlated with the location of the low-energy peak, with fla...
gamma-Glutamyltransferase is widely used as a marker of alcohol intake although its performance is poor. This might be related to other conditions influencing gamma-glutamyltransferase activity. The authors studied determinants of gamma-glutamyltransferase activity in a random sample (n = 6,010) drawn from the general population aged 25-64 years in Finland in 1992. In regression analysis, coffe...
OBJECTIVES High frequency oscillations have been suggested as a correlate of cognitive processes and have recently also been implicated in aberrant forms of information processing. The present study investigated whether magnetoencephalographic (MEG) gamma band activity (20-71 Hz) can serve as an index of cognitive processes in the absence of external stimulation and to what extent gamma activit...
to evaluate the effect of gamma rays on the seeds and amounts of nitrogen on growth and yield of chamomile (chamomilla recutita synonym matricaria chamomilla), a factorial experiment was conducted based on randomized complete block design with three replications at the research farm of agriculture college of shahid-beheshti.-urmia in 2010. treatments were gamma rays from cobalt-60 on chamomile ...
We performed 858 two-dimensional (2D) patient-specific intensity modulated radiotherapy verifications over a period of 18 months. Multifield, composite treatment plans were measured in phantom using calibrated Kodak EDR2 film and compared with the calculated dose extracted from two treatment planning systems. This research summarizes our findings using the normalized agreement test (NAT) index ...
The intrinsic distribution of spectral indices in GeV energies of gamma-ray–loud blazars is a critical input in determining the spectral shape of the unresolved blazar contribution to the diffuse extragalactic gamma-ray background, as well as an important test of blazar emission theories. We present a maximum-likelihood method of determining the intrinsic spectral index distribution (ISID) of a...
INTRODUCTION Sustained and elaborative emotional information processing in depression and decreased affective elaboration in schizophrenia are considered hallmarks of these disorders but have not been directly measured. Gamma-band (35-45 Hz) EEG has been associated with semantic functions such as feature binding and may index these elaborative processing. This study examined whether there were ...
We present a determination of the distributions of gamma-ray photon flux – the so-called LogN–LogS relation – and photon spectral index for blazars, based on the third extragalactic source catalogue of the Fermi Gamma-ray Space Telescope’s Large Area Telescope, and considering the photon energy range from 100 MeV to 100 GeV. The data set consists of the 774 blazars in the so-called Clean sample...
Agreement between planned and delivered dose distributions for patient-specific quality assurance in routine clinical practice is predominantly assessed utilizing the gamma index method. Several reports, however, fundamentally question current IMRT QA practice due to poor sensitivity and specificity of the standard gamma index implementation. An alternative is to employ dose volume histogram (D...
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