A principal observation in the study of language acquisition is that people exposed to a language as children are more likely to achieve fluency in that language than those first exposed to it as adults, giving rise to the popular notion of a critical period for language learning (Lenneberg, 1967; Long, 1990). This is perhaps surprising since children have been found to be inferior to adults in...

The melting of glacial ice that formed in the middle of the twentieth century may be a source of a cocktail of persistent, bio accumulative toxic substances that can threaten human health and the environment, according to a study by Christian Bogdal, a postdoctoral research fellow at the Swiss Federal Institute of Technology, Zürich, and colleagues in the 1 November 2009 issue of Environmental ...

BACKGROUND Rotavirus gastroenteritis (RVGE) is the most common cause of severe childhood diarrhea worldwide. Objectives were to estimate the burden of RVGE among children less than five years old in the Middle East (Bahrain, Iran, Iraq, Israel, Jordan, Kuwait, Oman, Qatar, Saudi Arabia, Syria, UAE, Yemen), North Africa (Algeria, Egypt, Libya, Morocco, Tunisia) and Turkey. METHODS A comprehens...

Estimating species density and abundance is challenging but important for establishing conservation management strategies. Significant progress has been made toward estimating Golden Eagle (Aquila chrysaetos) in the conterminous United States of America (USA) much less known about eagle Alaska. Here, we paired migration count GPS-tracking data collected near Gunsight Mountain, Alaska, a Bayesia...

The early administration of tranexamic acid (TXA) to bleeding trauma patients reduces all-cause mortality without increasing the risk of vascular occlusive events. Indeed, the risk of arterial thrombosis appears to be reduced with TXA. In this commentary we hypothesize that TXA has an antithrombotic effect and explore potential mechanisms. These include inhibition of the inflammatory effects of...

Contrary to popular opinion, we find evidence that the views of residents of both higher and lower income neighborhoods are represented by their legislators. Analyzing the voting behavior of California state legislators on 77 proposals on which both the legislature and the public cast ballots, we find first that the opinions of higher and lower income voters within a district are highly correla...

OBJECTIVES The goal of this study is to explore the relationship between pedestrian injuries and socioeconomic characteristics. METHODS Pedestrian collisions were identified in the data of the California Statewide Integrated Traffic Records System (SWITRS), which is assembled from police crash reports by the California Highway Patrol Information Services Unit. Four thousand crashes were ident...