A recent note induced me to resume the classic problem (Po) and its natural generalization: (P0) To construct a square, the sides of which go through four given points. (P) To construct a quadrilateral Q(XYZT) similar to a given quadrilateral q with its sides XY, YZ, • • • , respectively passing through four given points K, L, M, N. The solution of (P0) is classic: we immediately get a locus fo...

In Blind Source Separation (BSS) processing, taking advantage of scaling factor indetermination and based on the floatingpoint representation, we propose a scaling technique applied to the separation matrix, to avoid the saturation or the weakness in the recovered source signals. This technique performs an Automatic Gain Control (AGC) in an on-line BSS environment. We demonstrate the effectiven...

The paper addresses the problem of deening a neural system which combines pieces of independent information available in both the data and parameters spaces. The problem is approached in the framework of the probabilistic interpretation of neural modelling: in order to take into account the indetermination associated to the training process, a distribution in the weight space is associated to e...

Moments of photon energy spectrum in B → Xsγ decays, of hadronic mass spectrum and of lepton energy spectrum in B → Xclν decays are sensitive to the masses of the heavy quarks as well as to the non-perturbative parameters of the heavy quark expansion. Several measurements have been performed both at the Υ(4S) resonance and at Z center of mass energies. They provide constraints on the non-pertur...

The aim of this paper is to understand the reasons underlying Derrida’s interest in phenomenon prayer. article traces different directions taken by topic over forty-year long reflection philosopher. I start off highlighting dichotomic structure around which Derrida lays out his entire analysis prayer, describing it, general terms, as an opposition between determination and indetermination: on o...

This paper proposes a new blind channel estimation method for orthogonal frequency division multiplexing (OFDM) systems. The algorithm makes use of the redundancy introduced by the cyclic prefix to identify the channel based on a subspace approach. Thus, the proposed method does not require any modification of the transmitter and applies to most existing OFDM systems. Semi-blind procedures taki...

This work presents a campaign of fault injection to validate the dependability of a fault tolerant microcomputer system. The system is duplex with cold stand-by sparing, parity detection and a watchdog timer. The faults have been injected on a chip-level VHDL model, using an injection tool designed with this purpose. We have carried out a set of injection experiments (with 3000 injections each)...