Hopfield model of associative memory is studied in this work. In particular, two main problems that it possesses: the apparition of spurious patterns in the learning phase, implying the well-known effect of storing the opposite pattern, and the problem of its reduced capacity, meaning that it is not possible to store a great amount of patterns without increasing the error probability in the ret...

Intrusion detection systems aim at detecting attacks against computer systems and networks or against information systems in general as it is di cult to provide provably secure information systems and maintain them in such a secure state for their entire lifetime and for every utilization Sometimes legacy or operational con straints do not even allow a fully secure information system to be real...

Intrusion-detection systems aim at detecting attacks against computer systems and networks or, in general, against information systems. Indeed, it is difficult to provide provably secure information systems and to maintain them in such a secure state during their lifetime and utilization. Sometimes legacy or operational constraints do not even allow the definition of a fully secure information ...

In a paper of 1933, D.H. Lehmer continued Pierce’s study of integral sequences associated to polynomials, generalizing the Mersenne sequence. He developed divisibility criteria, and suggested that prime apparition in these sequences – or in closely related sequences – would be denser if the polynomials were close to cyclotomic, using a natural measure of closeness. We review briefly some of the...

It is well known that autonomic failure is severer in patients with dementia with Lewy bodies (DLB) compared with patients with Parkinson's disease (PD). According to the Braak's hypothesis, Lewy bodies first appear in the olfactory bulb or peripheral autonomic nervous system. Lewy bodies in the peripheral autonomic nervous system ascend to dorsal motor nuclei of vagus nerve, while those in the...

The treatment of the liver hydatid cyst is by far from being well codified and continues to be the subject of countless medical contradictions. The numerous surgical therapeutic methods proposed are approved or disapproved by various surgeons, so that it is very difficult to appreciate the value of a surgical procedure which appears very efficient in certain statistics but which generates compl...

Mobile to mobile video conferencing is one of the services that the newest mobile network operators can offer to users. With the apparition of the distributed video coding paradigm which moves the majority of complexity from the encoder to the decoder, this offering can be achieved by introducing a transcoder. This device has to convert from the distributed video coding paradigm to traditional ...

The numerical simulation of two-phase flow in a porous medium may lead, when using coupled finite volume schemes on structured grids, to the apparition of the so-called Grid Orientation Effect (GOE). We propose in this paper a procedure to eliminate this phenomenon, based on the use of new fluxes with a new stencil in the discrete version of the convection equation, without changing the discret...

Intrusion-detection systems aim at detecting attacks against computer systems and networks or, in general, against information systems. Indeed, it is difficult to provide provably secure information systems and to maintain them in such a secure state during their lifetime and utilization. Sometimes, legacy or operational constraints do not even allow the definition of a fully secure information...

The Cahn-Hilliard equation is very important in materials science. It is a conservation law which describes important qualitative behaviors of two-phase systems, namely, the phase separation process in a binary alloy. This phenomenon can be observed, for instance, when the alloy is cooled down sufficiently. One then observes a partial nucleation (i.e., the apparition of nucleides in the materia...