In this paper, a formal model for antivirus update agent system is presented based on mobile agent technology and predicate/transition Petri nets. The mobile agent system contains two mobile agents called DCA and UNA. It sends out agents to update antivirus on client computers in a network. Each agent takes on a specified responsibility. First, DCA roams through the network and check the last d...

Flavor transitions of Neutrinos with a nonstandard interaction are studied. A scalar field is conformally coupled to matter and neutrinos. This alters the neutrino effective mass its wavefunction leading damping factor, causing deficits in probability densities affecting oscillation phase. As density determines field's behavior, we also have an indirect effect on flavor conversion. We explain o...

background nowadays, removal of heavy metals from the environment is an important problem due to their toxicity. objectives in this study, a modified method was used to synthesize chitosan-coated magnetite nanoparticles (ccmn) to be used as a low cost and nontoxic adsorbent. ccmn was then employed to remove hg2+ from water solutions. materials and methods to remove the highest percentage of mer...

In this paper we consider the problem of estimation of the frequencies and damping factors of exponential signals in the presence of noise. We propose a non-iterative method based on using forward–backward linear prediction and the notion of extended order modeling. In addition to providing estimators of the unknown parameters in the model, the proposed method can be used to specify initial val...

In this paper we consider the structural damped trend model which is standard in arsenal of forecasting analysis. We both multiple sources error (MSOE) as well single source errors (SSOE). Relative to existing research, propose Bayesian analysis for estimation and based on Markov Chain Monte Carlo techniques and, especially, Gibbs sampler with data augmentation. empirical applications (from M3 ...

Model updating concerns the modification of an existing but inaccurate model with measured data. For models characterized by quadratic pencils, the measured data usually involve incomplete knowledge of natural frequencies, mode shapes, or other spectral information. In conducting the updating, it is often desirable to match only the part of observed data without tampering with the other part of...

Using the damped pendulum model we introduce the averaging method to study the periodic solutions of dynamical systems with small non–autonomous perturbation. We provide sufficient conditions for the existence of periodic solutions with small amplitude of the non–linear perturbed damped pendulum. The averaging method provides a useful means to study dynamical systems, accessible to Master and P...