The Fast query engine is a requirement as a supporting tool for the semantic web technology application such as Electronic Commerce environ. As the large data is represented using the effective data representation called RDF. The focus of this paper is to optimize the specific type of the query called Cyclic query and star query on main-memory RDF data model using ARQ query engine of Jena. For the considered problem, we ruminate a Jaya algorithm for rearrangement of the order of triple pattern and also compare the results with an already proposed approach in the literature. The evaluation result shows that Jaya performs better in terms of execution time in comparison to Ant Colony Optimization.

The biggest challenge in modern web is to tackle tremendous growth of data, scattered and continuously updating in nature. Processing of such unscattered data by human or machine remains a tedious task. Semantic Web; as a solution has already been invented. But, still there are some other challenges, like as optimization of the query. We introduce a new approach for real–time SPARQL query optimization with different forms and different triple patterns. The strategy introduces rearrangement of order of triple pattern using Differential Evolution(DE). The experimental study focus on main-memory model of RDF data and ARQ query engine of Jena. We compare the result of proposed approach with the Ant Colony Optimization(ACO) different versions and some other approaches. Results shows that proposed approach provides better execution time as compare to the other approaches.

Advancement in wireless technologies allows mobile devices to access Internet from anywhere at any time.

Each network is identified by unique IP address. Mobile IP allows a mobile node to change its network without changing IP address. Internet Engineering Task Force (IETF) has suggested several mobility management protocols such MIPv6, HMIPv6, PMIPv6 etc. for perpetual mobility. MIPv6 is a Host-Based Mobility Management (HBMM) protocol and provides global mobility solution to the mobile node. MIPv6 suffers from basic mobility related problems such as handover latency, packet loss etc. Recently the IETF has suggested Network-Based Mobility Management (NBMM) protocol. The Proxy Mobile IPv6 (PMIPv6) is first NBMM protocol. PMIPv6 significantly decreases the signaling overhead, but still has some issues related to the security, handover latency and packet loss. This paper proposes Secure and an Optimized Authentication Scheme in PMIPv6 (SOAS-PMIPv6) to reduce signaling overhead. The proposed scheme provides higher security than the basic PMIPv6 protocol and moreover reduces the signaling cost with respect to contemporary protocols. This paper performs comprehensive analysis on handover latency, packet delivery cost, packet loss etc. and the performance of protocols is mathematically investigated. Numerical result shows that the proposed scheme has improved performance than the MIPv6 in terms of handover latency and provides optimized security than PMIPv6 based protocols.