Angel Sánchez

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We report on the discovery of Very High Energy (VHE) γ-ray emission from the BL Lacertae object 1ES 1011+496. The observation was triggered by an optical outburst in March 2007 and the source was observed with the MAGIC telescope from March to May 2007. Observing for 18.7 hr, we find an excess of 6.2σ with an integrated flux above 200GeV of (1.58±0.32) · 10(More)
As a first step in the search of an analytical study of mechanical denaturation of DNA in terms of the sequence, we study stable, stationary solutions in the discrete, finite, and homogeneous Peyrard-Bishop DNA model. We find and classify all the stationary solutions of the model, as well as analytic approximations of them, both in the continuum and in the(More)
– On the morning of September 18, 1989, a category-four hurricane struck eastern Puerto Rico with a sustained wind speed in excess of 46 m/sec. The 24-h rainfall accumulation from the hurricane ranged from 100 to 339 mm. Average rainfall intensities ranging from 34 to 39 mm/h were calculated for 4 and 6 h periods, respectively, at a rain gage equipped with(More)
This paper presents the educational software tool HMMSim (Discrete Hidden Markov Model Simulator) for the definition, training and simulation of Discrete Hidden Markov Models (HMM). This software allows to create a HMM for a given pattern recognition problem, to train the HMM adjusting its parameters according to the training process, and to simulate the(More)
Cooperation lies at the foundations of human societies, yet why people cooperate remains a conundrum. The issue, known as network reciprocity, of whether population structure can foster cooperative behavior in social dilemmas has been addressed by many, but theoretical studies have yielded contradictory results so far—as the problem is very sensitive to how(More)
OBJECTIVE To assess the incidence of serotonin reuptake inhibitor (SRI) antidepressant-induced sexual dysfunction (SD) and to compare the sexual side effects of SRI. DESIGN Naturalistic, prospective, observational study. SETTING Two urban health centers. PATIENTS 235 outpatients (164 women, 71 males) who began treatment with some of the following SRI:(More)