Giuliano Castelli

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Multi-battery power supplies are b ecoming popular in electronic appliances of the latest generations, due to economical and manufacturing constraints. Unfortunately, a partitioned b attery subsystem is not able to deliver the same amount of charge as a monolithic battery with the same total capacity. In this paper, we deene the concept of battery(More)
—For portable applications, long battery lifetime is the ultimate design goal. Therefore, the availability of battery and voltage converter models providing accurate estimates of battery lifetime is key for system-level low-power design frameworks. In this paper, we introduce a discrete-time model for the complete power supply subsystem that closely(More)
We describe the activity done in the contest of the Grid.it project to access Astronomical Catalogues and Archives through grid environment. Different approaches are tested: job oriented, web service oriented. The crucial aspect of this work is the development and deployment of an IVOA compliant Data Source Engine model in the grid middleware.
In this paper, we introduce a discrete-time model for the complete power supply subsystem that closely approximates the behavior of its circuit-level (i.e., HSpice), continuous-time counterpart. The model is abstract and eecient enough to enable event-driven simulation of digital systems described at a very high level of abstraction and that include, among(More)
Battery life-time extension is a primary design objective for portable systems. Traditionally, battery life-time has been prolonged mainly by reducing average power consumption of system components. A careful analysis of discharge characteristics and the adoption of accurate high-level battery models in system-level design open new opportunities for(More)
We analyze the stochastic function C(n)(i) identical with y(i)-y(n)(i), where y(i) is a long-range correlated time series of length N(max) and y(n)(i) identical with (1/n) Sigma(n-1)(k=0)y(i-k) is the moving average with window n. We argue that C(n)(i) generates a stationary sequence of self-affine clusters C with length l, lifetime tau, and area s. The(More)
We present measurements of the semileptonic decays B--->D0tau-nutau, B--->D*0tau-nutau, B0-->D+tau-nutau, and B0-->D*+tau-nutau, which are potentially sensitive to non-standard model amplitudes. The data sample comprises 232x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector. From a combined fit to B- and B0 channels, we obtain the branching(More)
We present a study of B decays into semileptonic final states containing charged and neutral D1(2420) and D_{2};{*}(2460). The analysis is based on a data sample of 208 fb;{-1} collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. With a simultaneous fit to four different decay chains, the(More)