منابع مشابه
Revolutionary Science
On rare occasions in the history of science, remarkable discoveries transform human society and forever alter mankind's view of the world. Examples of such discoveries include the heliocentric theory, Newtonian physics, the germ theory of disease, quantum theory, plate tectonics and the discovery that DNA carries genetic information. The science philosopher Thomas Kuhn famously described scienc...
متن کاملRevolutionary Algorithms
The optimization of dynamic problems is both widespread and difficult. When conducting dynamic optimization, a balance between reinitialization and computational expense has to be found. There are multiple approaches to this. In parallel genetic algorithms, multiple sub-populations concurrently try to optimize a potentially dynamic problem. But as the number of sub-population increases, their e...
متن کاملTwo Birthdays a Hundred Years Ago
As President, it is my great privilege and honour to propose the toast of the Association of Physicians of Great Britain and Ireland. The Association has only once previously met in Belfast; in 1927, twenty-two years ago to this very day (3rd June, 1949). The dinner on that occasion, presided over by the late Professor James A. Lindsay, a great clinical teacher, philosopher and classic, was ren...
متن کاملAge-identities and the celebration of birthdays
In a paper in the January issue of this volume of Ageing & Society, Eric Midwinter argued that ‘much can be learned from re-drawing the demographic map with social rather than chronological contours ’. This opinion reflects a widespread view among social gerontologists that chronological age is an ‘empty ’ variable, even though it is central to the construction of social identities, both in bur...
متن کاملThe Association between Birthdays and Medical Emergencies
BACKGROUND Not many studies have examined the risk of emergency medical attendance during stressful life events or special days such as birthdays. This study looked at whether patients had a higher than normal chance of attending the emergency departments around their birthdays compared to the rest of the year. METHODS Patient attendance data were collected from our accident and emergency dep...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1995
ISSN: 0028-0836,1476-4687
DOI: 10.1038/373468a0