The Tor anonymisation network allows services, such as web servers, to be operated under a pseudonym. In previous work Murdoch described a novel attack to reveal such hidden services by correlating clock skew changes with times of increased load, and hence temperature. Clock skew measurement suffers from two main sources of noise: network jitter and timestamp quantisation error. Depending on th...

Although widely studied for many years, colour image quantisation remains a challenging problem. We propose to use an evolving self-organising map model for the on-line image quantisation tasks. Encouraging results are obtained in experiments and we look forward to implementing the algorithm in real world applications with further improvement.

Custom JPEG quantisation matrices are proposed to be used in the context of compressing iris polar images within iris recognition. These matrices are obtained by employing a Genetic algorithm for the corresponding optimisation. Superior matching results in iris recognition in terms of average Hamming distance and improved ROC are found as compared to the use of the default JPEG quantisation table.

There is reason to believe that at small scales and low temperatures, quantum mechanical effects will play a role in dissipative systems which arise in solid state physics. References to and a brief discussion of various approaches to the quantisation of the damped harmonic oscillator, can be found in [1]. Although there exist successful and physically intuitive ways to deal with the quantisati...

This paper presents a novel method for the low bit-rate compression of a feature vector stream with particular application to distributed speech recognition. The scheme operates by grouping feature vectors into non-overlapping blocks and applying a transformation to give a more compact matrix representation. Both Karhunen-Loeve and discrete cosine transforms are considered. Following transforma...