Abstract The adaptation of mutation rate parameter values is important to allow the search process to optimize its performance during run time. In addition it frees the user of the need to make non-trivial decisions beforehand. Contrary to real vector coded genotypes, for discrete genotypes most users still prefer to use a fixed mutation rate. Here we propose two simple adaptive mutation rate c...

Adaptive filtering has traditionally been developed based on the minimum mean square error (MMSE) principle and has found ever-increasing applications in communications. The paper develops adaptive filtering based on an alternative minimum bit error rate (MBER) criterion for communication applications. It is shown that the MBER filtering exploits the non-Gaussian distribution of filter output e...

TFRC (TCP Friendly Rate Control) is a rate-based congestion control protocol for non-TCP flows. TFRC controls the sending rate by using the TCP throughput equation considering the triple duplicate ACKs and the timeouts. However, this equation provides the conservative throughput bound of TCP. This conservativeness causes lower throughput and slower response time for TFRC than those for TCP. In ...

The role of positive darwinian selection in evolution at the molecular level has been keenly debated for many years, with little resolution. However, a recent increase in DNA sequence data and the development of new methods of analysis have finally made this question tractable. Here, I review the current state-of-play of the field. Initial estimates in Drosophila suggest that approximately 50% ...

It is known that, in the autoregressive model the spectral sensitivity curves are almost flat for the log-area ratios and in this paper it is shown that this property can be useful in adaptive IIR filtering. A new IIR lattice-form algorithm for adaptive filtering is proposed in which the update equation is applied to these parameters instead of the reflection coefficients. This transformation g...

Rate adaptive multimedia streams offer significant system and client benefits over non-adaptive streams. These benefits come at the price of increased complexity in providing adequate network support and difficulty in understanding how rate adaptation protocols affect client perceived QoS. In this paper we define quality of service in terms of the mean rate seen by the client. We identify an in...

The Intelligent Transportation Systeim (ITS) utilizes Vehicle-to-Vehicle (V2V) and Vehicle-to-Roadside (V2R) communication, enabled by Vehicular Ad Networks (VANETs), to implement many traffic safety application. Vehicles and Road Side Units (RSUs), in VANETs, periodically broadcast messages, known as beacons, contain many vehicle’s driving parameters such as current position, direction, speed,...

We investigate dynamic adaptation policies for rate adaptive multimedia streams in a network where each route traverses at most one bottleneck link. Dynamic adaptation allows clients to dynamically adapt the stream subscription level, i.e., time-average stream rate, in response to changes in available link capacity, and allows the system to maintain a lower blocking probability than is possible...

In video coding standards, such as MPEG-4 and H.263, one important question is how to determine motion vectors for motion compensation in the INTER mode. Usually the sum of absolute differences (SAD) or the sum of squared differences (SSD) is employed as a matching criterion. Although these criteria are related to the distortion, they do not consider the bit rate appropriately. If we want to co...

Server replication and multicasting are wellestablished techniques for increasing capacity of a networked service and improving client performance. In this paper, we consider the combination of these two techniques. Specifically, we investigate the problem of selecting amongst rate-adaptive multicast servers, which adjust their sending rate based on network conditions and/or feedback from clien...