Constraint acquisition systems assist the non-expert user in modelling her problem as a constraint network. QUACQ is sequential algorithm that generates queries (partial) examples to be classified positive or negative. The drawbacks are may need answer great number of such examples, within significant waiting time between two learn all constraints. In this paper, we propose PACQ, portfolio-base...

Long Term Evolution (LTE) uses single carrier frequency division multiple access (SCFDMA) technique as the multiple access scheme in the uplink, due to its low peak to average power ratio (PAPR) compared to orthogonal frequency division multiple access (OFDMA). This advantage is achieved when the Resource Blocks (RBs) allocated to a user are contiguous in frequency domain. Considering this cons...

In this work we propose an orthogonal pulse waveform for wireless ultra wideband (UWB) transmission. The design is based on an ideal low-pass prototype filter having a windowed sinc impulse response. The frequency response of the prototype filter is transferred to the high frequency region using a specific sign modulator. The UWB pulse waveform comprises of the weighted summation of the left si...

Experiments on a chain of coupled pendula driven periodically at one end demonstrate the existence of a regime which produces an output frequency at an odd fraction of the driving frequency. The stationary state is then obtained with numerical simulations and modeled with an analytical solution of the continuous sine-Gordon equation that resembles a kinklike motion back and forth in the restric...

We study the impact of quenched disorder on dynamics locally constrained quantum spin chains, that describe 1D arrays Rydberg atoms in both frozen (Ising-type) and dressed ($XY$-type) regime. Performing large-scale numerical experiments, we observe no trace many-body localization even at large disorder. Analyzing role terms systems show they act two, distinct competing ways: as an on-site term ...