polydimethylsiloxane (pdms) has been synthesized by ring-opening polymerization of octamethylcyclotetrasiloxane (d4) in microemulsion with acidic catalyst. the structure and properties of microemulsion were characterized by transmission electron microscopy (tem), fourier transform infrared spectroscopy (ft-ir), photo correlation spectroscopy (pcs). the effect of the variation in ph value, amoun...

We propose a rate-distortion optimized video frame dropping strategy that can be applied on active network nodes in case of heavy traffic load. Our approach relies on side information that is sent along with the video bit-streams. The side information consists of a rate vector containing the frame size (in bytes) of every picture as well as a distortion matrix describing the reconstruction dist...

Internet worms and DDoS attacks are considered the two most menacing attacks on today’s Internet. The traditional wisdom is that they are different beasts, and they should be dealt with independently. In this paper, however, we show that a unified rate limiting algorithm is possible, which effectively works on both Internet worms and DDoS attacks. The unified approach leads to higher worm traff...

| The objective of this paper is to determine the minimum system dropping rate induced by variable frame TDMA schemes supporting time-constrained applications with common maximum cell delay tolerance. Expressions are derived for the induced (optimal) system dropping rate and the maximum number of users that can be admitted in the network without violating the maximum dropping rate constrain is ...

Network applications and users have very diverse service expectations and requirements, demanding for provisioning different levels of quality of service on the Internet. As the speed of network links has been rising at a pace that exceeds that of the growth in the buffer size, packet loss rate differentiation has been an active research topic. However, none of the existing packet dropping sche...

Network applications and users have very diverse service expectations and requirements, demanding for provisioning of different levels of quality of service on the Internet. As the speed of network links has been rising at a pace that exceeds that of the growth in the buffer size, packet loss rate differentiation has been an active research topic. However, none of the existing packet dropping s...

This paper describes four scheduling algorithms and two packet-dropping algorithms for transmitting soft-real-time variable-bit-rate traffic in a packet-switched network. Simulation results show that the first-come-first-serve algorithm, which is equivalent to the earliest-deadline-first algorithm when all packets have equal relative deadlines, outperforms the timed-token algorithm as well as t...