نتایج جستجو برای: year data period 1956
تعداد نتایج: 3161027 فیلتر نتایج به سال:
OBJECTIVES Changes in gender ratio generally reflect differences in mortality rates in men and women. Female mortality rates, on the other hand, can be used as an index of the trends in women's health. This study looks at the trend in the population gender ratio from 1956 to 2006, with a focus on analysing mortality rates and hence the overall health of Iranian women over the last 50 years. S...
This paper explains the implications of a mathematical theory (by the same authors) of holes in fractals and their relation to dimension for measurements. The novelty of our approach is to consider the fractal measure on a set rather than just the support of that measure. This should take into account in a more precise way the distribution of data points in measured sets, such as the distributi...
THIOPENTONE was introduced to clinical anaesthesia by Lundy in 1934 and the first reports of its use appeared in the following year (Lundy, 1935; Lundy and Tovell, 1935). Since then, thiopentone has almost entirely superseded other intravenous agents and has become the standard agent for inducing anaesthesia. It is not, however, without certain dangers. The main disadvantages are the occasional...
climate change is defined as long term and irreversible changes in the climatic behaviorof a region. many studies have been conducted in different regions of the world on climatechange. the results of these studies show considerable changes in climatic factors especiallyin precipitation and temperature. in this research, the trend of changes in annual and seasonalrainfall and temperature in 24 ...
Rebalancing water allocation between human consumptive uses and the environment in water catchments is a global challenge. This paper proposes a socio-hydrological water balance framework by partitioning catchment total evapotranspiration (ET) into ET for society and ET for natural ecological systems, and establishing the linkage between the changes of water balance and its social drivers and r...
Based on long-term rainfall measurements (1956-2012), water level records (1956-2006), and aquatic plants field survey data (1960-2014), the relationship between precipitation and aquatic vegetation succession in east Taihu Lake, China, is studied. Neither abrupt changes nor any trends were found in the annual rainfall series in Taihu Lake during the studied period (1956-2012). However, for sea...
Objectives: Ageing and its consequences at the onset of the third millennium is becoming one of the major population-related issues in all countries. Methods & Materials: At present, Iran is undergoing a population transformation from a young age structure to an old age one. Although at the time being the elderly population (60 years and over) is rather small proportion of total population, ...
This paper extends the previous literature on the intergenerational transmission of human capital by exploiting variation in compulsory schooling reforms across nine European countries over the period 1920-1956. My empirical strategy follows an IV approach, instrumenting parental education with years of compulsory schooling. I nd some evidence of a causal relationship between parents' and child...
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