منابع مشابه
Biological factors affecting family size.
Latterly much attention has been attracted, and rightly so, to the number, variety, and potency of the socio-economic factors which strongly incline married couples deliberately to restrain their fertility and thereby to limit the size of-their families. A tendency to overlook a number of purely biological factors which work in the same direction is to be discerned. These latter are for the mos...
متن کاملFamily factors affecting child development.
In a large, geographically defined population of children a number of family factors in addition to social class, determined by the father's occupation, were recorded by health visitors and school nurses with routine responsibility for these children. The quality of the children in normal schools was assessed in terms of nonverbal IQ and height at the ages of 5 and 10 years, and of behavior as ...
متن کاملBiological and behavioral factors affecting driving safety.
The European Commission estimates that car crash-related costs in Europe are around 160 billion euros, approximately 2% of the Gross Domestic Product [1]. In several countries, car crashes are the first cause of death among subjects aged 15-30, with a direct heavy impact on the years of life lost; in young subjects car crashes also represent one of the major causes of disability [2]. Several dr...
متن کاملFactors affecting bubble size in ionic liquids.
This study reports on understanding the formation of bubbles in ionic liquids (ILs), with a view to utilising ILs more efficiently in gas capture processes. In particular, the impact of the IL structure on the bubble sizes obtained has been determined in order to obtain design principles for the ionic liquids utilised. 11 ILs were used in this study with a range of physico-chemical properties i...
متن کاملFactors Affecting Litter Size in Pigs
Litter size in pigs has been defined in a number of ways, depending on the goals of the specific experiment. Number of total piglets, including mummies and stillborns, number of fully formed piglets, excluding mummies but including stillborns, and the number of piglets born alive have all been used as endpoints of litter size research. The end measures are chosen with the idea that the causes o...
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ژورنال
عنوان ژورنال: Journal of Epidemiology & Community Health
سال: 1949
ISSN: 0143-005X
DOI: 10.1136/jech.3.1.1