In the past two decades there has been a resurgence of interest in the role of the family in the care and education of young children. The current attention on families stems largely from several interrelated global trends. Family structures throughout the world continue to change in response to industrialisation, urbanisation, population growth, increasing longevity, and migration. While these...

Increased development results in the loss of forest, farm, range, and other open space lands that contribute to the quality of life of U.S. residents. I describe an economic rationale for growing public support for preserving local open space, based the growing scarcity of open space lands. I test the rationale empirically by correlating the prevalence of open space referenda in U.S. counties t...

trichoderma spp. are known as efficient plant growth promoting agents. hence, enrichment of soil by appropriate population of trichoderma is useful and important for effective plant growth promote. present study aimed to investigate the plant growth promoting effects of five strains of the genus trichoderma species include: trichoderma harzianum tr6, t. harzianum t22, t. asperellum t34, t. atro...

a basic subject in economy is change in growth of population and it’s link to ‎other variables. if growth in population is consistent with other economic ‎circumstances, it would lead to economic growth, otherwise it would be ‎problematic. by using okun's law and population structures, this paper is ‎analysis the case for iran for 1974-2010. predictions are related to 2025 ‎horizon. the re...

Mathematical models of population growth have been constructed to provide an abstract of some significant aspect of true ecological situation. In this paper, we put some models where the parameters of the biological growth model systematically change over time. Verhust (1838) first proposed three-parameter model for the growth of single-species populations [1,5,9] that shows a logistic sigmoid ...

The southeast coast of mainland Florida is within a biogeographic transition zone of high marine biodiversity (Briggs, 1974; Gilmore, 1995). This region is also undergoing some of the most rapid human population growth of any area of the United States (Culliton et al., 1990). Due to the economic and recreational value of beaches, substantial marine dredging projects (up to 1.5 × 105 m 3 of fill...

in this study myer index was calculated for six groups of a sample of urban and rural population of iran, classified by population size. the data used were information collected on 146116 urban and 158124 rural populations, for estimation of death, birth and growth rates in iran. the results indicate: the range of the index varies between 23.14-68.06 for women and 28.41-69.62 for men (urban or ...

the life history of an acarid mite, tyrophagus putrescentiae (schrank), on fusarium graminearum clade was investigated at 25 â± 1â°c, 60 â± 5% rh and a photoperiod of 16: 8 (l: d) h. incubation period for egg hatch, larval and nymphal periods and adult longevity were 2.22 â± 0.06, 3.46 â± 0.12, 4.84 â± 0.16 and 10.05 â± 0.9 days, respectively. the average life span of males and females were 22....