This survey is accomplished by the purpose of effective social and cultural factors on educational progress of high-school students in Shoush city.Out of 3200 persons about 280 persons were selected as sample volume according to Cochran formula. Sampling method was simple random.The most appropriate theory for this research is Parsons systematical theory .In this survey ,the relation of 8 varia...

6 Prediction of future child’s sex is a question of keen public interest. Probability of having a child of 7 either sex is close to 50%, although multiple factors may slightly change this value. Some 8 demographic studies suggested that sex determination can be influenced by previous pregnancies, 9 although this hypothesis was not commonly accepted. This paper explores correlations between 10 s...

BACKGROUND Cardiovascular devices can have different safety and effectiveness profiles in men and women. The type and quality of sex-specific data reviewed by the Food and Drug Administration (FDA) before approval of these devices are unknown. METHODS AND RESULTS We performed a systematic review of the demographics, comments on gender bias, and analysis of results by sex for 78 high-risk card...

A wealth of research has examined psychological responses to trauma among male military service members, but few studies have examined sex differences in response to trauma, such as coping strategies. This study assessed coping strategies used by male and female U.S. service members completing an intensely stressful mock-captivity exercise, compared strategies by sex, and assessed the relations...

The adult sex ratio (ASR) is a key parameter of the demography of human and other animal populations, yet the causes of variation in ASR, how individuals respond to this variation, and how their response feeds back into population dynamics remain poorly understood. A prevalent hypothesis is that ASR is regulated by intrasexual competition, which would cause more mortality or emigration in the s...

The magnitude and variability of sex differences in vocational interests were examined in the present meta-analysis for Holland's (1959, 1997) categories (Realistic, Investigative, Artistic, Social, Enterprising, and Conventional), Prediger's (1982) Things-People and Data-Ideas dimensions, and the STEM (science, technology, engineering, and mathematics) interest areas. Technical manuals for 47 ...

Sex differences in shock thresholds in relation to the day-night cycle were examined in rats and gerbils using a modification of the flinch-jump technique. In rats, males had higher thresholds than females in both day and night tests, but the magnitude of the difference was greater during the night tests. This effect arose because females tested at night had lower thresholds than females tested...

The percent of households headed by married couples has recently fallen below 50%, while the percent of unmarried couples (both heterosexual and homosexual) continues to rise. Nationally-representative estimates of unmarried couples which first appeared in the 1990 and 2000 decennial Censuses are now available on an annual basis through the American Community Survey. In this paper we use state-...