We're jamming
نویسندگان
چکیده
منابع مشابه
New jamming scenario: from marginal jamming to deep jamming.
We study the properties of jammed packings of frictionless spheres over a wide range of volume fractions. There exists a crossover volume fraction which separates deeply jammed solids from marginally jammed solids. In deeply jammed solids, all the scalings presented in marginally jammed solids are replaced with remarkably different ones with potential independent exponents. Correspondingly, the...
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We investigate the existence of random close and random loose packing limits in twodimensional packings of monodisperse hard disks. A statistical mechanics approach— based on several approximations to predict the probability distribution of volumes— suggests the existence of the limiting densities of the jammed packings according to their coordination number and compactivity. This result has im...
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Can an intelligent jammer learn and adapt to unknown environments in an electronic warfare-type scenario? In this paper, we answer this question in the positive, by developing a cognitive jammer that adaptively and optimally disrupts the communication between a victim transmitter-receiver pair. We formalize the problem using a novel multi-armed bandit framework where the jammer can choose vario...
متن کاملJamming Transition
Jamming phenomena arise in many systems. Granular materials, glasses and colloidal systems are just a few examples of it. This paper summerizes current effort of unifying these phenomena into a single jamming phase transition. Two examples, granular materials and colloidal suspensions, are discussed in detail to illusrate the idea. The strengths and weaknesses of this picture are addressed at t...
متن کاملJamming and anti-jamming techniques in wireless networks: a survey
Because of the proliferation of wireless technologies, jamming in wireless networks has become a major research problem due to the ease in blocking communication in wireless networks. Jamming attacks are a subset of denial of service (DoS) attacks in which malicious nodes block legitimate communication by causing intentional interference in networks. To better understand this problem, we need t...
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ژورنال
عنوان ژورنال: Nature Physics
سال: 2011
ISSN: 1745-2473,1745-2481
DOI: 10.1038/nphys2193