U.S. invention has become increasingly concentrated around major tech centers since the 1970s, with implications for how much cities across country share in concomitant local benefits. Is becoming a winner-takes-all race? We explore rising spatial concentration of patents and identify an underlying stability their distribution. Software have exploded to account about half today, these are highl...

Four remote population samples (Yanomamo and Xingu Indians of Brazil and rural populations in Kenya and Papua New Guinea) had the lowest average blood pressures among all 52 populations studied in INTERSALT, an international cooperative investigation of electrolytes and blood pressure. Average systolic blood pressure was 103 versus 120 mm Hg in the remaining INTERSALT centers; diastolic blood p...

Background & objectives: Health care centers are among the most important and essential centers that proper and timely access to them is one of the basic goals of social justice. The health of the individual and the community depends on the centers that provide primary health care. Rapid, timely, and inexpensive access to these centers is very important and necessary, in any community, especial...

OBJECTIVES To reveal the equity of health workforce distribution in urban community health service (CHS), and to provide evidence for further development of community health service in China. METHODS A community-based, cross-sectional study was conducted in China from September to December 2011. In the study, 190 CHS centers were selected from 10 provinces of China via stratified multistage c...

Enterobius vermicularis has the widest geographic distribution among parasitic worms. This infestation is more common children in population centers (nursery school, preschool).

Population centers and their information units or libraries were established as early as the 1920s, but population evolved as a field of study in its own right mainly during the 1950s and 60s. This paper attempts not so much to describe all that has taken place in the population information field to date, as to describe the activities of the Association for Population/Family Planning Libraries...

Heroic worldwide conservation efforts have made great strides in saving China’s endangered national treasure, the giant panda. Now, in China, there are over 65 giant panda reserves that have been established and three large breeding centers. But despite these efforts, just 1,596 pandas remain in the wild. Breeding programs in conservation centers and zoos hope to save the panda by improving gen...

Denial of human rights, gender disparities, and living in a war zone can be associated with severe depression and poor social functioning, especially for female drug abusers. This study of Afghan women in drug abuse treatment (DAT) centers assesses (a) the extent to which these women have experienced human rights violations and mental health problems prior to entering the DAT centers, and (b) w...