منابع مشابه
Rovers for Mars Polar Exploration
TABLE 1 Requirement for Mobility Range of Mobility Traverse from landing site to target of interest Size of landing error ellipse (~50 km) with current entry technology Examine a specific science target 1–10 m (assuming the target is small) Traverse from study target to study target 10–100 m (depends on spacing of targets) Examine several different geologic processes 100’s of m to few km (depen...
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Anecdotal comparisons frequently are made between expeditions of the past and space missions of the future. Spacecraft are far more complex than sailing ships, but from a psychological perspective, the differences are few between confinement in a small wooden ship locked in the polar ice cap and confinement in a small high-technology ship hurtling through interplanetary space. This paper discus...
متن کاملThe state and future of Mars polar science and exploration.
As the planet's principal cold traps, the martian polar regions have accumulated extensive mantles of ice and dust that cover individual areas of approximately 10(6) km2 and total as much as 3-4 km thick. From the scarcity of superposed craters on their surface, these layered deposits are thought to be comparatively young--preserving a record of the seasonal and climatic cycling of atmospheric ...
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Decision making in an uncertain environment poses a conflict between the opposing demands of gathering and exploiting information. In a classic illustration of this " exploration-exploitation " dilemma 1 , a gambler must balance the desire to select what appears the richest option on the basis of accumulated experience, against the desire to choose a less familiar but potentially more advantage...
متن کاملThe Stefan Problem: Polar Exploration and the Mathematics of Moving Boundaries∗
A geophysicist and a mathematician are having coffee. The mathematician queries, “what are you working on these days?” and the geophysicist responds, “I am studying the growth of ice.” The mathematician says, “I see, the Stefan Problem!”, to which his colleague says, “Oh, so you know about Stefan and Weyprecht?”...“Certainly, Stefan must be a mathematician, but Weyprecht–who is Weyprecht?” We a...
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ژورنال
عنوان ژورنال: Nature Cell Biology
سال: 2002
ISSN: 1465-7392,1476-4679
DOI: 10.1038/ncb1102-e256