نتایج جستجو برای: trend had decreasing behavior
تعداد نتایج: 1737341 فیلتر نتایج به سال:
We investigated the wall-motion and nucleation activation volumes of Co/Pt multilayer films prepared by dc magnetron sputtering under various Ar sputtering pressures. Delicate analysis of time-resolved domain evolution patterns reveals that the nucleation activation volume is generally smaller than the wall-motion activation volume in all the samples, which is consistent with the nucleation-dom...
Abstract The fossil record of the cave lion, Panthera spelaea , suggests a gradual decrease in body size, process peaking just before extinction species at end Late Pleistocene. Such an evolutionary trend appears rather unusual for large felid and requires further investigation. This study reviews lions Ukraine, whose fossils are known from 46 localities dated 800 kyr to 18–17 ago, with special...
The aim of this study was to examine the effects of age, time period, and birth cohorts with dengue fever/dengue hemorrhagic fever (DF/DHF) in Bangkok, Thailand over the period 1981-2000. The age group at greatest risk for DF/DHF was 5-9 years old. The period effect shows a remittent pattern, with significant increases in 1986-1990 and 1996-2000. The birth cohort group showed a significant decr...
We employ self-consistent mean-field theory to study the phase behavior and the microstructural sizes of AB diblock copolymers in the presence of a neutral solvent S1 and a slightly B-selective solvent S2. In particular, the effects of copolymer volume fraction phiC, the solvent ratio, and the immiscibility parameter between two solvents chiS1S2, are examined. We find that increasing chiS1S2 no...
Background: Toxic alcohol poisonings are responsible for high mortality and morbidity in Russia. This study was aimed to evaluate the trends of harmful ethanol (EtOH) drinking as well as methanol (MeOH), isopropanol (IPA) and ethylene glycol (EG) poisonings in the Middle Urals region of Russia. Methods: In this retrospective study, the medical records of patients poisoned with MeOH, IPA and EG ...
The warming trend of the past decade may be related to increasing amounts of downward solar radiation reaching the Earth’s surface. Recent decreases in tropospheric aerosols may also have contributed via both direct and indirect aerosol effects. The green line (above) reveals a long-term decreasing tendency in the tropospheric aerosol optical thickness (AOT) and the red line shows the overall b...
The aim of this study is to investigate the trend of spatial and temporal changes in the future extreme temperature of Iran. The data used include daily data of minimum temperature and maximum temperature of CCSM4 model during the basic period of 1986-2005 and the future period of 2006-2050 under scenarios of 4.5 and 8.5 in Iran. The results of studying the trend of warm and cold extreme during...
the aim of this study was to determine the trend of changes in cataract surgical rate (csr) in the provinces of iran during 2006 to 2010 and identify high risk areas.this report is part of the national iranian csr study. the percentage change in csr in 2010 compared to 2006 was conducted in each province, retrospectively. one hundred and ten centers were chosen from all provinces, to determine ...
The statistical signatures of the ‘credit crunch’ financial crisis that unfolded between 2008 and 2009 are investigated by combining tools from statistical physics and network theory. We devise measures for the collective behavior of stock prices based on the construction of topologically constrained graphs from cross-correlation matrices. We test the stability, statistical significance and eco...
Clusters play important role for understanding and transferring microscopic to macroscopic properties.Geometric and electron properties of Small nickel clusters up to the tetramer has been investigated by Density Functional Theory (DFT). Raising the number of nickel clusters atoms were indicated decreasing the average equilibrium (Ni-Ni) distance of atoms and also the binding energy of per atom...
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