In string gas cosmology, extra dimensions are stabilised by a gas of strings. In the matter-dominated era, competition between matter pushing the extra dimensions to expand and the string gas pulling them back can lead to oscillations of the extra dimensions and acceleration in the visible dimensions. We fit this model to supernova data, taking into account the Big Bang Nucleosynthesis constrai...

We present a bidder aid tool that allows bidders to more effectively participate in combinatorial FCC spectrum auctions by enabling concise expression of preferences. In addition to logical relationships between items, bidders may express spectrum-specific preferences such as those related to minimum population coverage, bandwidth, and budget. The tool can be used to simultaneously generate and...

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Introduction: Nature presents abundant examples of closed curves that may be considered as some sort of deformed ellipses. Gielis (2003) invented a superformula to parameterize such shapes.

Article history: Received 23 July 2013 Received in revised form 13 April 2014 Accepted 5 May 2014 Available online 15 May 2014 Communicated by A. Skowron

one of the most remarkable basis of the gravity data inversion is the recognition of sharp boundaries between an ore body and its host rocks during the interpretation step. therefore, in this work, it is attempted to develop an inversion approach to determine a 3d density distribution that produces a given gravity anomaly. the subsurface model consists of a 3d rectangular prisms of known sizes ...