Alvaro Valcarce

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This paper introduces analytical expressions for the modeling of path-loss and shadow fading in residential indoorto-outdoor scenarios. The formulas have been calibrated using channel power measurements at the radio frequencies of common cellular systems and are thus suitable for channel modeling in femtocell networks. The expressions presented here can be(More)
The red-giant branch (RGB) in globular clusters is extended to larger brightness if the degenerate helium core loses too much energy in "dark channels." Based on a large set of archival observations, we provide high-precision photometry for the Galactic globular cluster M5 (NGC 5904), allowing for a detailed comparison between the observed tip of the RGB(More)
This paper introduces a rapidly deployable wireless network based on Low Altitude Platforms and portable land units to support disaster-relief activities, and to extend capacity during temporary mass events. The system integrates an amalgam of radio technologies such as LTE, WLAN and TETRA to provide heterogeneous communications in the deployment location.(More)
This paper describes two IP-level architectures for connecting 3G femtocells via Iuh to a femtocell gateway over a BGAN satellite link. These architectures allow femtocells to be deployed in isolated regions where satellite links serve as the only means of communication (e.g. oceanic outposts, deserts, rural regions, disaster areas, etc). Additionally, this(More)
  • C. Moni Bidin, F. Mauro, +6 authors R. G. Kurtev
  • 2011
Context. The census of Galactic globular clusters (GCs) is still incomplete, and about ten new objects are supposed to await discovery, hidden behind the crowded and reddened regions of the Galactic bulge and disk. Aims. We investigated the nature of three new GC candidates, discovered in the frames collected by the Vista Variables in the Via Lactea (VVV)(More)
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