منابع مشابه
Detecting Censor Detection
Our goal is to empirically discover how censors react to the introduction of new proxy servers that can be used to circumvent their information controls. We examine a specific case, that of obfuscated Tor bridges, and conduct experiments designed to discover how long it takes censors to block them (if they do block at all). Through a year’s worth of active measurements from China, Iran, Kazakhs...
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We propose an alternative inflationary universe scenario in the context of Randall-Sundrum braneworld cosmology. In this new scenario the existence of extra-dimension(s) plays an essential role. First, the brane universe is initially in the inflationary phase driven by the effective cosmological constant induced by small mismatch between the vacuum energy in the 5-dimensional bulk and the brane...
متن کاملThe Cosmic Censor Forbids Naked Topology
For any asymptotically at spacetime with a suitable causal structure obeying (a weak form of) Penrose's cosmic censorship conjecture and satisfying conditions guaranteeing focusing of complete null geodesics, we prove that active topological censorship holds. We do not assume global hyperbolicity, and therefore make no use of Cauchy surfaces and their topology. Instead, we replace this with two...
متن کاملSupersymmetry as a cosmic censor.
In supersymmetric theories the mass of any state is bounded below by the values of some of its charges. The corresponding bounds in the case of Schwarzschild (M & 0 ) and Reissner-Nordstrom (M & ~q~) black holes are known to coincide with the requirement that naked singularities be absent. Here we investigate [U(1)j charged dilaton black holes in this context. The extreme solutions are shown to...
متن کاملThe Kähler Cone as Cosmic Censor
M-theory effects prevent five-dimensional domain-wall and black-hole solutions from developing curvature singularities. While so far this analysis was performed for particular models, we now present a model-independent proof that these solutions do not have naked singularities as long as the Kähler moduli take values inside the extended Kähler cone. As a by-product we obtain information on the ...
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ژورنال
عنوان ژورنال: Index on Censorship
سال: 1981
ISSN: 0306-4220,1746-6067
DOI: 10.1080/03064228108533316