نتایج جستجو برای: background selection
تعداد نتایج: 1130158 فیلتر نتایج به سال:
Case Study of 137Cs: Optimizing Counting Conditions with Different Background Region Width Selection
Throughout the years, an optimizing counting conditions and optimum background region width determination has been carried out by several methods in gamma-ray spectroscopy. The effect of various widths focus on digital integration photopeak analysis. As application tool this nuclear physics, radioactive sources mostly used lower or higher resolution detectors; such as NaI(Tl) HPGe detectors. Th...
This paper studies a portfolio selection problem in such situation where the future asset return rates cannot be well obtained by historical data but have to given experts' evaluations. In order reflect impact of realistic conditions on investment decisions, background risk and some constraints are also considered. First, nonlinear uncertain mean-risk model for is proposed. For further discussi...
Background suppression in the COSINUS experiment: Active muon veto and radiopure materials selection
For over twenty-five years the DAMA/LIBRA experiment has reported an annual modulation signal that is consistent with a dark matter explanation. This is, currently, in tension null results observed by other searches utilize different target detectors. The COSINUS will perform model-independent cross-check of result using same material, NaI crystals, operated as scintillating calorimeters. By me...
در دنیا مناطقی وجود دارند که ساکنین آنها در معرض پرتوهای طبیعی زمینه بالا هستند. این مناطق به high background radiation areas hbras ، معروف می باشند. از جمله این مناطق می توان به گوارا پاری در برزیل ، کرالا در هند ، نواحی از آمریکا و یانگ جیانگ در چین اشاره کرد. در ایران نیز مناطق با پرتودهی زمینه بالا مشاهده شده است . رامسر یکی از این مناطق است .
Genetic variation for quantitative traits is often greater than that expected to be maintained by mutation in the face of purifying natural selection. One possible explanation for this observed variation is the action of heterogeneous natural selection in the wild. Here we report that selection on quantitative trait loci (QTL) for fitness traits in the model plant species Arabidopsis thaliana d...
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