43,141 research outputs found
Approximate amenability of Segal algebras II
We prove that every proper Segal algebra of a SIN group is not approximately
amenable
Strengthening e-banking security using keystroke dynamics
This paper investigates keystroke dynamics and its possible use as a tool to prevent or detect fraud in the banking industry. Given that banks are constantly on the lookout for improved methods to address the menace of fraud, the paper sets out to review keystroke dynamics, its advantages, disadvantages and potential for improving the security of e-banking systems. This paper evaluates keystroke dynamics suitability of use for enhancing security in the banking sector. Results from the literature review found that keystroke dynamics can offer impressive accuracy rates for user identification. Low costs of deployment and minimal change to users modus operandi make this technology an attractive investment for banks. The paper goes on to argue that although this behavioural biometric may not be suitable as a primary method of authentication, it can be used as a secondary or tertiary method to complement existing authentication systems
Exact cosmological solutions for MOG
We find some new exact cosmological solutions for the covariant
scalar-tensor-vector gravity theory, the so-called MOdified Gravity (MOG). The
exact solution of the vacuum field equations has been derived. Also, for non
vacuum cases we have found some exact solutions with the aid of the Noether
symmetry approach. More specifically, the symmetry vector and also the Noether
conserved quantity associated to the point-like Lagrangian of the theory have
been found. Also we find the exact form of the generic vector field potential
of this theory by considering the behavior of the relevant point-like
Lagrangian under the infinitesimal generator of the Noether symmetry. Finally,
we discuss the cosmological implications of the solutions.Comment: 8 pages, to appear in European Physical Journal
Amenability notions of hypergroups and some applications to locally compact groups
Different notions of amenability on hypergroups and their relations are
studied. Developing Leptin's theorem for discrete hypergroups, we characterize
the existence of a bounded approximate identity for hypergroup Fourier
algebras. We study the Leptin condition for discrete hypergroups derived from
the representation theory of some classes of compact groups. Studying
amenability of the hypergroup algebras for discrete commutative hypergroups, we
obtain some results on amenability properties of some central Banach algebras
on compact and discrete groups.Comment: Significant revisions to the paper. Abstract revised, some typos
corrected, some references added. The exposition has been improved while the
paper has been shortened significantly. An error in the proof of the Leptin
theorem is corrected by restricting the case to discrete hypergroup
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