منابع مشابه
The last tortoise
The UN used World Environment Day earlier this month to launch a report highlighting the problems facing the conservation and management of biodiversity in the face of the many assaults humans are making on the natural environment. The report — Dead Planet, Living Planet; Biodiversity and Ecosystem Restoration for Sustainable Development — highlights not only the preservation of natural ecosyst...
متن کاملjohn steinbeck: friend of the american common man
in his last years of life americans had almost forgotton steinbeck, and those who had not, occasionally criticized him for supporting and praising the u. s. military intervention in the vietnam war. althought ateinbeck incorporates different themes into his works, each one bears many signs of his concern and sympathy for america and the american common people in particular. steinbecks to a god ...
15 صفحه اولThe Tortoise and the Hut
he men of old were born like the wild beasts. In woods, caves, and groves, they lived on food gathered in the fi elds, " wrote Marcus Vitruvius Pollio more than 2,000 years ago in his well-known account of classical traditions in architecture. One day, a dense group of trees, agitated by winds and storms, caught fi re. Humans nearby ran from the fl ames but then, attracted to the warmth, began ...
متن کاملThe Hare and the Tortoise
J.P. MAY It is a pleasure to be here to help celebrate Mike Boardman’s 60th birthday. I have just finished writing a history of stable algebraic topology from the end of World War II through 1966 [18]. The starting point was natural enough. The paper of Eilenberg and Mac Lane [6] that introduced the categorical language we now all speak appeared in 1945, and so did the paper of Eilenberg and St...
متن کاملTortoise and the Hare Robot
We investigated the effects of changing the teleoperation feel of operating a robot by modifying its speed and acceleration profiles, and found that reducing a robot’s maximum speed by half can reduce collisions by 32%, while only increasing navigation task time by 10%. Teleoperated robots are increasingly popular for enabling people to remotely attend meetings, explore dangerous areas, or view...
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ژورنال
عنوان ژورنال: Science
سال: 1894
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.ns-23.575.83-a