منابع مشابه
Spare the (Elastic) Rod
Physicists love emergence. From a welter of complex details about a system's constituents, simple and universal rules sometimes emerge that adequately describe the collective behavior of the components. Even if these rules are not completely universal, they often have only a few relevant parameters, a vast simplification compared to the many that describe the constituents individually. But as V...
متن کاملSpare the rod, spoil the degeneration.
A host of retinal degenerations, including many types of retinitis pigmentosa, follow a pattern of rod loss followed by cone loss. The rod loss may take many years, causing problems with night vision and peripheral visual field constriction. Only after significant rod loss occurs does cone loss ensue, with its devastating loss of central vision. The pathophysiology for some of these degeneratio...
متن کاملSpare the Mbl, spoil the rod?
Fibronectin for branching ranched organs are shaped when epithelia make their own paths, according to a study by Takayoshi Sakai, Melinda Larsen, and Kenneth Yamada (National Institutes of Health, Bethesda, MD). The pathmaker in this process is fibronectin (FN), which tells cells to let go of their neighbors and instead grab hold of the underlying matrix. Organs such as the lung and kidney gain...
متن کاملSpare the Rod? the Dynamic Effects of Failing
This paper considers the effect of failing to make accountability standards on school performance in the long run and with repeated failure. We extend the typical static regression discontinuity approach to our dynamic context to separate an effect of failure from disparities in unobserved, time-varying school productivity that lead to different histories of failure. Using data on North Carolin...
متن کاملMotor Learning: Spare the Rod to Benefit the Child?
A new study has found that individuals who were rewarded while they learned a motor task performed it much better one month later than those who were punished or received nothing. Long-term memories depend on events experienced during learning.
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ژورنال
عنوان ژورنال: The Physics Teacher
سال: 2019
ISSN: 0031-921X
DOI: 10.1119/1.5084933