SUMMARY Gastrointestinal helminths of Norway rat (Rattus norvegicus) from the Belgrade area were studied as a part of a wider ecological research of rats in Serbia (data on the distribution, population ecology, economic and epizoothiological-epidemiological importance, and density control). Rats were captured from May 2005 to July 2009 at both urban and… (More)
We investigate the properties of (directed) zero-divisor graphs of matrix rings. Then we use these results to discuss the relation between the diameter of the zero-divisor graph of a commutative ring R and that of the matrix ring M n R.
This paper discribes an implementation of the VPN (Virtual Private Network) over the Internet for a large-scale customer as a service provider managed service. Furnishing a global corporation with turnkey solution for it's inter and intrabusiness communication needs delivered security, quality and cost efficiencies. The accompanied highly reliable… (More)
We discuss the determination of the radius of the total graph of a commutative ring R in the case when this graph is connected. Typical extensions such as polynomial rings, formal power series, idealization of the R-module M and relations between the total graph of the ring R and its extensions are also dealt with.
This paper explores an Internet-based VPN solution, built upon IPSec, which combines tunneling with PKI authentication and encryption. To protect the valuable company resources, an efficient intrusion/misuse detection and response system was incorporated into deployed security solution. This approach enabled a large-scale customer provide their global… (More)
We review some methods of associating graphs to rings. The main emphasis is on zero-divisor graphs and comaximal ones. Some new results in both directions are presented.
Vladimir V. Vukadinović Internet is a transport infrastructure intended for applications with various service requirements. However, Internet remains to be a best-effort network without widely deployed mechanisms for service differentiation and quality of service (QoS) provisioning. Research efforts to provide service differentiation in the Internet have… (More)