Recently many prominent web sites face a new type of denial of service attack known as Distributed Denial of Service attack (DDoS). Organizations deploying security measures such as firewalls, and intrusion detection systems could face the traditional DoS attack. Yet there is no complete solution neither for protection from DDoS attack, nor for preserving network hosts from participating in suc...

The article presents a comparison of fairness properties of different congestion control schemes. It is hard to investigate the various protocol mechanisms implemented in transport protocols; therefore a simulator called SimCast is developed for the analysis of fairness characteristics of transport protocols as well as a network traffic generator and measurement tool called SimTest. This articl...

We present a dynamic distributed load balancing algorithm for parallel, adaptive nite element simulations using preconditioned conjugate gradient solvers based on domain-decomposition. The load balancer is designed to maintain good partition aspect ratios. It can calculate a balancing ow using di erent versions of di usion and a variant of breadth rst search. Elements to be migrated are chosen ...

The fluctuations in the vertical displacement angle of a stick balanced at the fingertip exhibit on-off intermitency. However, even a skilled balancer cannot indefinitely maintain a stick balanced at their fingertip. The survival function for stick balancing, P (tesc > t), is shown to have the form of a Weibul function, exp(−λt)β , where λ is a constant and β > 1. The measured survival function...

The balancing numbers are natural numbers n satisfying the Diophantine equation 1 + 2 + 3 + · · · + (n − 1) = (n + 1) + (n + 2) + · · · + (n + r); r is the balancer corresponding to the balancing number n.The n balancing number is denoted by Bn and the sequence {Bn} ∞ n=1 satisfies the recurrence relation Bn+1 = 6Bn−Bn−1. The balancing numbers posses some curious properties, some like Fibonacci...