The spreading of an epidemic is determined by the connectivity patterns which underlie the population. While it has been noted that a virus spreads more easily on a network in which global distances are small, it remains a great challenge to find approaches that unravel the precise role of local interconnectedness. Such topological properties enter very naturally in the framework of our two-tim...

Troubleshooting large operational networks is extremely difficult due to the extensive usage of multipath routing. We present NetSonar, a system that localizes performance problems in such networks. It uses planned tomography, whose input comes from a novel test technique that maximizes component coverage while minimizing probing overhead. Earlier techniques are either white box (assuming compl...

in this paper, a five–dimensional mathematical model is proposed for the transmission dynamics of hiv/aids within a population of varying size. in writing the model, we have divided the population under consideration into five sub classes of susceptible, infective, pre-aids, aids related complex and that of aids patients. the model has two non- negative equilibria namely, a disease free and the...

Opportunistic ad hoc networks are characterized by intermittent and infrastructure-less connectivity among mobile nodes. Because of the lack up-to-date network topology information frequent link failures, geographic routing utilizes location adopts store–carry–forward data delivery model to relay messages in a delay-tolerant manner. This paper proposes message-forwarding policy based on movemen...

In Opportunistic Networks (OppNets), mobile devices transmit messages by exploiting the direct contacts, without the need of an end-to-end infrastructure. Disconnections of nodes and high churn rates are normal features of opportunistic networks. Hence, routing is one of the main challenges in this environment. In this paper, we provide a survey of the main routing approaches in OppNets and cla...

the ability to discover services in mobile ad hoc network (manet) is a major prerequisite. cluster basedcross layer intelligent service discovery for manet (cbisd) is cluster based architecture, caching ofsemantic details of services and intelligent forwarding using network layer mechanisms. the cluster basedarchitecture using semantic knowledge provides scalability and accuracy. also, the mini...

In this paper, we analyze dynamic switching networks where the networks switch arbitrarily among a set of topologies. For this class of dynamic networks, we derive an epidemic threshold considering the SIS epidemic model. First, an epidemic probabilistic model based on assumption of independence between states of nodes is developed. We identify conditions for the epidemic dying out by linearizi...

In the context of global epidemic that has lasted for many months, international trade been declining, and China’s economy entered a new normal. The freight forwarding industry is becoming more competitive. Many small medium-sized companies are facing difficulties in survival. Risk bankruptcy. This article takes customer service management Guangdong GW forwarder as an example, analyzes dilemma ...

Geocasting is a special variant of multicasting, where data packet or message is transmitted to a predefined geographical location i.e., known as geocast region. The applications of geocasting in VANET are to disseminate information like, collision warning, advertising, alerts message, etc. In this paper, we have proposed a model for highway scenario where the highway is divided into number of ...