منابع مشابه
The Ultimate Hack: Re-inventing Intelligence to Re-engineer Earth
It is for me a huge honor to be invited to deliver the counterbalancing view within this distinguished gathering of counter-terrorism experts. 1 Let me begin by emphasizing what I consider to be the " three strikes " or in international terms, the " side-out " of government counter-terrorism thinking today. STRIKE ONE: Terrorism is a symptom, not a root cause or threat. Going after Al Qaeda has...
متن کاملProgress toward an ultimate proof of the prion hypothesis.
E indications that the infectious agent responsible for scrapie did not contain nucleic acid (1) led to several insightful hypotheses to explain this conundrum (2). Eventually considerable data came to support one of these ideas, dubbed the prion hypothesis, also shown to be applicable to related fatal transmissible spongiform encephalopathies including Creutzfeldt–Jakob and mad cow disease (3)...
متن کاملThe snowball Earth hypothesis: testing the limits of global change
, 65, 85–87.Prasad, N. and Roscoe, S.M., 1996. Evi-dence for anoxic to oxic atmosphericchange during 2.45–2.22 Ga from lowerand upper sub-Huronian paleosols.Catena, 27, 105–121.Prave, A.R., 1999a. Two diamictites, twocap carbonates, two dC excursions,two rifts: the Neoproterozoic KingstonPeak Formation, Death Valley, Califor-nia. Geology, 27, 339–342....
متن کاملTesting the Collisional Erosion Hypothesis for the Hadean Earth
Introduction: Impact cratering is a fundamental geologic process involved in the original accretion and subsequent evolution of planetary bodies throughout the Solar System. Impacts have the ability to add or remove material from their target body and, therefore, affect their target’s geochemical make-up. Geochemical studies have shown that Earth, relative to chondritic and/or solar abundances,...
متن کاملYawning, fatigue, and cortisol: expanding the Thompson Cortisol Hypothesis.
Yawning and its involvement in neurological disorders has become the new scientific conundrum. Cortisol levels are known to rise during stress and fatigue; yawning may occur when we are under stress or tired. However, the link between yawning, fatigue, and cortisol has not been fully understood. Expansion of the Thompson Cortisol Hypothesis proposes that the stress hormone, cortisol, is respons...
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ژورنال
عنوان ژورنال: Journal of Biogeography
سال: 2004
ISSN: 0305-0270
DOI: 10.1111/j.1365-2699.2003.01049.x