Network virus propagation is influenced by various factors, and some of them are neglected in most of the existed models. So, mathematical model of network virus propagation is simplified. In fact, many factors are very important during the virus propagation. In this paper, we investigate epidemiological models to reason about email virus propagation. The paper extended the classical virus prop...

Analytical models exist for evaluating gossip-based information propagation. Up to now these models were developed only for fully connected networks. We provide analytical models for information propagation of a push-pull gossiping protocol in a wireless mesh network. The underlying topology is abstracted away by assuming that the wireless nodes are uniformly deployed. We compare our models wit...

the effects of different climatic, soil, geometric, and management factors on soil organic carbon (soc) degradation and sequestration potential was evaluated in the semi-arid zone of mereg watershed, west of iran. two nonparametric methods, viz. classification and regression tree (cart) and feed forward back propagation artificial neural network (ann) were compared with parametric multivariate ...

modelling of crack propagation by finite element method under mixed mode conditions is of prime importance in fracture mechanics. this paper describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. crack growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress criterion,...

In this paper, we examine discrete time propagation graphs as a potential framework for thin scattering layer models. The particular class of interest are propagation graphs formed from Cayley graphs of Zd, as their underlying geometry and shift-invariance make them appealing as potential models of the desired physical process. We show that their shift-invariant nature makes it possible to use ...

This paper describes a study of how 2.45GHz electromagnetic waves propagate indoors. 2.45GHz is a typical Bluetooth frequency. Propagation models with both one and several transmitters have been made using an advanced computer program. Furthermore, a model of the propagation of 433MHz radio waves has been made and used as a standard point of comparison. To make sure that such models are reliabl...

Capacity dimensioning is performed before launching a cellular network, which includes coverage estimation and forecast of throughput. Cellular companies in developing countries like Pakistan are only providing 2G services, while 3G services are still in process of being launched. Although a lot of research has been done on 3G services in developed countries but there is very little knowledge r...

In this paper, the influence of the features of the propagation channel in the performance of energy-efficient routing algorithms for wireless sensor networks is studied. Although there are a lot of works regarding energy-efficient routing protocols, almost no reference to realistic propagation channel models and influence is made in the literature. Considering that the propagation channel may ...

Wireless technology continues to experience rapid growth and development. With the ever increasing demand for wireless services and applications, more advanced tools are necessary to ensure the performance of these wireless systems. One of the most important tools for system development and radio planning are the radio propagation channel models. These models allow system designers and radio pl...

Radio tracking, communications and guidance at sea rely on interpreting of radar signals. This has motivated extensive studies of the physical factors governing the pattern of signal propagation over the ocean. Although over the last several decades the models of electromagnetic propagation have been substantially advanced (Kukushkin (2004); Levy (2000)), measurements and modeling results still...