Online renting of software products is emerging as a new way of dissemination for several major software firms. Compared to outright selling, the online renting scheme delivers a software product as a service instead of a physical good. Hence, users are not easily able to illegally duplicate or distribute it. In this paper, we investigate the impact of the online renting mechanism on software p...

Several neural algorithms for Independent Component Analysis (ICA) have been introduced lately, but their computational properties have not yet been systematically studied. In this paper, we compare the accuracy , convergence speed, computational load, and other properties of ve prominent neural or semi-neural ICA algorithms. The comparison reveals some interesting diierences between the algori...

A graph G is well-covered provided each maximal independent set of vertices has the same cardinality. The term sk of the independence sequence (s0, s1, . . . , sα) equals the number of independent k-sets of vertices of G. We investigate constraints on the linear orderings of the terms of the independence sequence of well-covered graphs. In particular, we provide a counterexample to the recent u...

It has been well known that edge filters in the visual system can be generated by the InfoMax principle. In this paper, the “InfoMin” principle is proposed, which asserts that the information through some neighboring signals on a two-dimensional mapping must be minimized. It is shown that the standard Comon’s ICA can be derived from the combination of the InfoMax principle for the whole signals...

In this paper we apply three different independent component analysis (ICA) methods, including spatial ICA (sICA), temporal ICA (tICA), and spatiotemporal ICA (stICA), to gene expression time series data and compare their performance in clustering genes and in finding biologically meaningful modes. Up to now, only spatial ICA was applied to gene expression data analysis. However, in the case of...

This paper reports experimental results on the index of cognitive activity (ICA), a recent micro-level measure in pupillometry, which relates processing load to the frequency of rapid small dilations of the pupil. We collected pupil size during a tracking task which was cast in a simulated driving context, as well as for a dual task of simultaneous tracking and language processing. The present ...

Healthy Voice Production and Voice Care are subjects of growing concern nowadays. Knowing that many Voice Diseases result in asymmetric vibration, a method to estimate the percentage of asymmetry has been developed on the Glottal Source obtained by the inverse filtering of Voice. The asymmetric biomechanics is treated as a result of unknown sources which are separated using classical Independen...

Independent subspace analysis (ISA) that deals with multidimensional independent sources, is a generalization of independent component analysis (ICA). However, all known ISA algorithms may become ineffective when the sources possess temporal structure. The innovation process instead of the original mixtures has been proposed to solve ICA problems with temporal dependencies. Here we show that th...