As a major cereal crop, rice (Oryza sativa L.) is crucial to food security for at least half the world population. New varieties with high yield potential, good quality and high resistance to biotic and abiotic stresses are needed in order to meet the demand for more food arising from the rapid human population growth and concurrent decrease in arable land. Improvement of rice quality has now b...

Introduction: Head circumference (HC) measurement is one of the important parameter for diagnosis of neurological, developmental disorders and dysmorphic syndromes. Recognition of different disorders requires an understanding of normal variation for HC size, in particular, in infancy period with most rapid growth of the brain. Because of international and interracial standard chart differences ...

the relationship between population structure and violent conflict is complex and heavily dependent on the behavior of other variables like governance, economic prospects, and urbanization. while addressing rapid population growth might be a necessary condition for peace, it is by no means sufficient. concomitant steps must also be taken to foster inclusivity, guarantee broader rights for all, ...

background and aims: nowadays, the age structure of iran is transitioning from youth to elderly. although, the elderly population are still accounted for a small portion of the population; however, the population growth rate of this age group is growing compared to the growth of the total population. therefore, understanding of the changes of this population is necessary. this study aimed to id...

Many third world countries face rapid population aging over the coming decades. The demographic trend poses two significant policy challenges – sustaining strong economic growth and establishing effective economic support systems for the elderly. This paper shows that the demographic transition presents two opportunities for more rapid economic growth. The first dividend arises because of the r...

The world population will reach 7 billion in late 2011, a demographic milestone that is causing renewed attention to the challenges caused by population growth. This article looks at the last 50 years of demographic change, one of the most extraordinary periods in demographic history. During this period, world population grew at rates that have never been seen before and will almost surely neve...