منابع مشابه
To catch a falling robber
We consider a Cops-and-Robber game played on the subsets of an n-set. The robber starts at the full set; the cops start at the empty set. In each round, each cop moves up one level by gaining an element, and the robber moves down one level by discarding an element. The question is how many cops are needed to ensure catching the robber when the robber reaches the middle level. Alan Hill posed th...
متن کاملExosomes: A Rising Star in Falling Hearts
Although exosomes were previously recognized as a mechanism for discharging useless cellular components, growing evidence has elucidated their roles in conveying information between cells. They contribute to cell-cell communication by carrying nucleic acids, proteins and lipids that can, in turn, regulate behavior of the target cells. Recent research suggested that exosomes extensively particip...
متن کاملProteolysis: Adaptor, Adaptor, Catch Me a Catch
The ClpXP protease of bacteria can degrade a wide variety of proteins while maintaining remarkable substrate selectivity. New work in Escherichia coli implicates adaptor proteins in enhancing substrate selectivity and regulating the flow of substrates to cellular proteases.
متن کاملModeling a falling slinky
Related Articles Video-based spatial portraits of a nonlinear vibrating string Am. J. Phys. 80, 862 (2012) Pogo stick spring Phys. Teach. 49, L2 (2011) Exact non-Hookean scaling of cylindrically bent elastic sheets and the large-amplitude pendulum Am. J. Phys. 79, 657 (2011) The Cramster Conclusion Phys. Teach. 49, 291 (2011) Strain in layered zinc blende and wurtzite semiconductor structures g...
متن کاملTo Catch a Predator
This paper is about moral panics over contemporary technology, which I call " technopanics. " I use two examples, the cyberporn panic of 1996 and the contemporary panic over online predators and MySpace, to demonstrate the links between media coverage and content legislation. In both cases, Internet content legislation is directly linked to media-fueled moral panics that concern uses of technol...
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: 2003
ISSN: 0028-0836,1476-4687
DOI: 10.1038/423123a