Volume 22, No. 2 (2012)

Articles

SECURE BEE ALGORITHMS FOR ROUTING IN MOBILE AD HOC NETWORKS (MANETS): A SURVEY

The Mobile Ad hoc Networks (MANETs) due to infrastructureless, mobility and limited physical security of nodes are vulnerable to a number of security threats. Hence designing a secure routing protocol has become a popular research topic. Bio/Nature-inspired routing algorithms (Swarm Intelligence) such as BeeAdHoc have been presented for developing routing algorithms for MANETs. In this paper, first, we inspect the security vulnerabilities of BeeAdHoc and then study the presented algorithms for improving the BeeAdHoc, which some of them utilized asymmetric cryptography based on digital signatures and others are based on Artificial Immune Systems (AIS). Afterward, BeeAdHoc with its secure frameworks and classical routing protocols AODV and DSR are compared. Our results show that the iBeeAIS is a suitable candidate for secure routing in MANETs.

DENSE SUBCLASSES IN ABSTRACT SOBOLEV SPACES ON METRIC MEASURE SPACES

Given a metric measure space (X; d; μ) and a Banach function space B over X that has absolutely continuous norm, we prove two results regarding the density in the Newtonian space N^ 1,B (X) of the subclasses consisting of bounded functions, respectively of bounded functions supported in closed balls. We do not assume that μ is a doubling measure. If B is rearrangement invariant, (X; d) is proper and the measure μ is non-atomic, it turns out that the class of bounded compactly supported functions from N^ 1,B (X) is dense in N^ 1,B (X).

A GENERALIZATION OF LOCALLY MINKOWSKI GLⁿ SPACE

We continue the investigation of the generalized Lagrange spaces [4] with the case when Fⁿ is a locally Minkowski space. Moreover, we generalize the GL-metric γιφ(ψ) and give the canonical metric connections.

A GENERAL FIXED POINT THEOREM FOR OCCASIONALLY WEAKLY COMPATIBLE HYBRID PAIRS IN QUASI - METRIC SPACES AND APPLICA-TIONS

In this paper a general fixed point theorem for two pairs of occasionally weakly compatible hybrid pairs in quasi - metric spaces is proved. As an application we reduce the study of fixed points for occasionally weakly compatible pairs in G - metric spaces to the study of occasionally weakly compatible pairs in quasi - metric spaces.

CERTAIN GENERALIZATION OF SUPERCONTINUITY/δ-CONTINUITY

Two generalizations of supercontinuous functions (Indian J. Pure Appl. Maths. 13(1982), 229-236) and δ -continuous functions (J. Korean Math. Soc. 16(1980), 161-166) are introduced. Several properties of these generalizations and their relationships with other variants of continuity in the literature are investigated. These new variants of supercontinuity / δ -continuity also generalize certain forms of (almost) strong θ-continuity (J. Korean Math. Soc. 18(1981), 21-28; Indian J. Pure Appl. Maths. 15(1) (1984), 1-8).