We propose a delayed SIRS computer virus propagation model. Applying monotone iterative techniques and Lyapunov functional techniques, we establish sufficient conditions for the global asymptotic stability of both virusfree and virus equilibria of the model.

Yellow Leaf Syndrome of sugarcane is caused by Sugarcane Yellow Leaf Virus (SCYLV) and/or Sugarcane Yellows Phytoplasma (SCYP). Using tissue blot immunoassay to determine the presence of SCYLV, leaf samples of sugarcane variety N32 taken from a propagation plot at Mount Edgecombe all tested positive. In this study, two methods of tissue culture were used in an attempt to eradicate SCYLV from N3...

By considering the varying latency period of computer virus, we propose a novel model for computer virus propagation in network. Under this model, we give the threshold value determining whether or not the virus finally dies out, and study the local stability of the virusfree and virus equilibrium. It is found that the model may undergo a Hopf bifurcation. Next, we use different methods to prov...

advantages such as a larger cargo load ( 14 kb, allowing the inclusion of more genes or larger regulatory elements), different insertion preferences, and the exclusive use of TTAA target sequence.2-4 For some applications, the PB transposition offers an additional advantage: the integrated transposon can be precisely excised by re-expression of PB transposase transiently as shown by several gro...

Recent studies have reported direct reprogramming of human fibroblasts to mature neurons by the introduction of defined neural genes. This technology has potential use in the areas of neurological disease modeling and drug development. However, use of induced neurons for large-scale drug screening and cell-based replacement strategies is limited due to their inability to expand once reprogramme...