منابع مشابه
Why Earth Optimism?
focus on conservation in this issue of Science appears on the eve of Earth Day, which is being celebrated by scientists in meetings and public events worldwide. Conservation professionals, who have long condemned attacks on the environment, will gather for Earth Optimism events to highlight conservation achievements. Separately, but simultaneously, marches for science will highlight science’s a...
متن کاملWhy is Posterior Sampling Better than Optimism for Reinforcement Learning?
Computational results demonstrate that posterior sampling for reinforcement learning (PSRL) dramatically outperforms existing algorithms driven by optimism, such as UCRL2. We provide insight into the extent of this performance boost and the phenomenon that drives it. We leverage this insight to establish an ̃ O(H p SAT ) Bayesian regret bound for PSRL in finite-horizon episodic Markov decision ...
متن کاملWhy Bigger Isn't Better in Earth Observation.
1476 The Disputed Birth of Buckyballs 1479 France Set to Reopen AIDS Pact? 1480 New Journal Will Publish Without Paper 1481 Why Bigger Isn't Better in Earth Observation 1482 Allocating the Pain in Energy Science 1483 Healy Uses Wit to Woo NIHers Another Sex Survey Bites the Dust 1484 Briefings: Shuttle Souvenirs a Ocean-Slick Yardstick a AIDS Parley Site Set A California v. Genetic Discriminati...
متن کاملOptimism.
Optimism is an individual difference variable that reflects the extent to which people hold generalized favorable expectancies for their future. Higher levels of optimism have been related prospectively to better subjective well-being in times of adversity or difficulty (i.e., controlling for previous well-being). Consistent with such findings, optimism has been linked to higher levels of engag...
متن کاملWhy do food and drink smell like earth?
Fungi have long been associated with earthy odours. One of the main contributors to this odour is geosmin, a sesquiterpenoid metabolite produced by soil living fungi. Some food commodities are liable to contamination by geosmin producing fungi. Under favourable environmental conditions the production of geosmin occurs. One of the producers of geosmin in fruits is Penicillium expansum which also...
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ژورنال
عنوان ژورنال: Science
سال: 2017
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.aan4082