2,261 research outputs found
Improved Measurement of Inclusive Radiative B-meson decays
We report a fully inclusive measurement of the flavor changing neutral
current decay in the energy range 1.7 \GeV\le
E^\mathrm{c.m.s}_\gamma\le 2.8 \GeV, covering 97% of the total spectrum, where
c.m.s is the center of mass system. Using 605\ifb of data, we obtain in the
rest frame of the -meson , where the
errors are statistical, systematic and from the boost correction needed to
transform from the rest frame of the (c.m.s) to that of the
-meson, respectively. We also measure the first and second moments of the
photon energy spectrum as functions of various energy thresholds, which extend
down to 1.7 \GeV. The results are preliminary.Comment: 10 pages, 11 figure
Automatic Information Extraction from Investment Product Documents
In this paper we report on the activities carried out within a collaboration between Consob and Sapienza University. The developed project focus on Information Extraction from documents describing financial investment products. We discuss how we automate this task, via both rule-based and machine learningbased methods, and describe the performances of our approach
Second Order Nonlinear Optical Properties of 4-Styrylpyridines Axially Coordinated to A4 ZnII Porphyrins: A Comparative Experimental and Theoretical Investigation
In this research, two 4-styrylpyridines carrying an acceptor \u2013NO2 (L1) or a donor \u2013NMe2 group (L2) were axially coordinated to A4 ZnII porphyrins displaying in 5,10,15,20 meso position aryl moieties with remarkable electron withdrawing properties (pentafluorophenyl (TFP)), and with moderate to strong electron donor properties (phenyl (TPP) < 3,5-di-tert-butylphenyl (TBP) < bis(4-tert-butylphenyl)aniline) (TNP)). The second order nonlinear optical (NLO) properties of the resulting complexes were measured in CHCl3 solution by the Electric-Field-Induced Second Harmonic generation technique, and the quadratic hyperpolarizabilities \u3b2\u3bb were compared to the Density Functional Theory (DFT)-calculated scalar quantities \u3b2||. Our combined experimental and theoretical approach shows that different interactions are involved in the NLO response of L1- and L2-substituted A4 ZnII porphyrins, suggesting a role of backdonation-type mechanisms in the determination of the negative sign of Electric-Field-Induced Second Harmonic generation (EFISH) \u3b2\u3bb, and a not negligible third order contribution for L1-carrying complexes
Improving domiciliary robotic services by integrating the ASTRO Robot in an AmI Infrastructure
This work describes the ECHORD Experiment ASTROMOBILE, a project aimed to design, develop and test a system for favourable independent living, improved quality of life and efficiency of care for senior citizens in domestic environments. The system, composed of a mobile robotic platform (called ASTRO) and an Ambient Intelligent Infrastructure that actively cooperated between them and with the end-user, was designed and implemented with a user-centred design approach, involving different stakeholders. The system was designed to deliver services to users, like drug delivery, stand support, reminding, info-entertainment. The design took advantages of the integration of robotic platforms with smart environments, to provide to users higher quality and localization based services. Senior end-users were involved in the experimentation of the system in the DomoCasa Living Lab and feedbacks were gathered for the technology assessment. Particularly, this paper demonstrates the general feasibility of the ASTROMOBILE system and thanks to users feedbacks its acceptability and usability
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