Multilayer Music Representation and Processing: Key Advances and Emerging Trends

This work represents the introduction to the proceedings of the 1st International Workshop on Multilayer Music Representation and Processing (MMRP19) authored by the Program Co-Chairs. The idea is to explain the rationale behind such a scientific initiative, describe the methodological approach used in paper selection, and provide a short overview of the workshop's accepted works, trying to highlight the thread that runs through different contributions and approaches

Interactions in Mobile Sound and Music Computing

none4siopenGeronazzo M.; Avanzini F.; Fontana F.; Serafin S.Geronazzo, M.; Avanzini, F.; Fontana, F.; Serafin, S

Optimal cruise performance of a conventional helicopter

This article presents an analytical framework for investigating the cruise performance of conventional helicopter configurations. Starting from the analysis of power required in straight-and-level flight, endurance and range performance of turbine- and battery-powered rotorcraft are considered, for which it is assumed that fuel consumption and constant-power battery discharge models are, respectively, made available. The original contributions of the article are represented by (a) a closed-form formulation for expected endurance and range for both classes of vehicles, where electrical helicopters have not been dealt with in previous studies and (b) the analytical derivation of an accurate estimate for best endurance and best range airspeeds as a function of relevant system parameters. The approach is validated by analyzing two reference helicopters, showing good physical insight and better accuracy with respect to other techniques available in the literature, for the identification of an energy-efficient cruise flight strategy

Single axis pointing for underactuated spacecraft with a residual angular momentum

The problem of aiming a generic body-fixed axis along an inertially fixed direction is dealt with for an underactuated spacecraft in the presence of a non-zero residual angular momentum, when only two reaction wheels can exchange angular momentum with the spacecraft platform. An analytical condition for the feasibility of the desired pointing is derived first, together with a closed-form solution for the corresponding attitude with zero platform angular rate. A nonlinear controller is then developed in the framework of singular perturbation theory, enforcing a two-timescale response to the system. Convergence to the desired attitude, when the pointing direction falls within admissible limits, is then proved for rest-to-rest maneuvers and randomly generated initial tumbling conditions for a configuration representative of a small-size satellite