منابع مشابه
A Global Experiment UnderWay
HABITAT LOSS AND FRAGMENTATION ARE THE principal drivers of biodiversity loss, notably in the tropics (7). One of the most immediate results of fragmentation is the loss of top predators. As early as 12 years ago, evidence was provided for top-down effects of predator removal in tropical forest mammalian communities (2). Now, in their report "Ecological meltdown in predator-free forest fragment...
متن کاملMobile telephone study underway.
Epidemiologists at the University of Leeds in the United Kingdom will study victims of brain tumors over the next 3 years to determine if the use of mobile phones has contributed to the victims cancers. At the same time, the researchers will study the use of mobile phones by an equal number of people without cancer. Epidemiologist Tricia McKinney, PhD, who will lead the study said, “The causes ...
متن کاملPlanning for US Precision Medicine Initiative underway.
While continuing to defend his besieged health-care reform law against lawsuits and repeal threats, US President Barack Obama is championing a new health initiative. This one also has a bold goal: to radically change the medical treatment patients receive in the USA. “I want the country that eliminated polio and mapped the human genome to lead a new era of medicine—one that delivers the right t...
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ژورنال
عنوان ژورنال: Historia Mathematica
سال: 1997
ISSN: 0315-0860
DOI: 10.1006/hmat.1997.2177