• The assumption that the target concept C∗ belongs to C (or that the target function f ∗ belongs to F ) means that we are trying to fit a hypothesis to data, which are a priori known to have been generated by some member of the model class defined by C (or by F ). However, in general we may not want to (or be able to) assume much about the data generation process, and instead would like to fin...

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