The Session Initiation Protocol (SIP) is a signaling framework that allows two or more parties to establish, alter, and terminate various types of media sessions. The mechanism employed by the standard SIP is not e ective in handling overload situations that occur when the incoming ow of requests overcomes the processing resources of the server. In this paper we present a local overload control...

The Internet is a battleground of control by national governments, among other actors. That contested control takes the form not only of Internet filtering but also of activities that directly impact cyber security, including surveillance and malware hosting. To better understand that battleground, it is important to understand how each nation structures the Internet within its borders. One hel...

The brightness of light produced at a point (s) in a light source is inversely proportional to ψ(s)f(β), where ψ(s) is the local coupling angle, f(β) is a function of the transverse beta-functions and n depends on photon diffraction effects and ranges from 1 to 2. As well, brightness is proportional to the circulating current, which, for a given lifetime, is proportional to the average vertical...

background: severe abdominal pain is not common after laparoscopic surgeries, but acute or chronic pain after operation is considerable in some patients. post-operative pain control after laparoscopic surgeries, is conventionally achieved using analgesics such as non-steroidal anti-inflammatory drugs (nsaids) and narcotics, but their administration has a lot of side effects. this study compares...

A method is presented for the systematic design of stabilising decentralised controllers for large-scale interconnected dynamical systems. The design method is based on (i) decentralised implementation of global controllers obtained by using existing global controller design methods, (ii) model reduction of dynamical systems, and (iii) modelling of the interactions among the subsystems comprisi...

The goal of this paper is to extend to two-dimensional optimal control systems with scalar input the classical notion of Gaussian curvature of two-dimensional Riemannian surface using the Cartan’s moving frame method. This notion was already introduced by A. A. Agrachev and R. V. Gamkrelidze for more general control systems using a purely variational approach. Then we will see that the “control...