3,295 research outputs found

    Environmental Effects on Local Active Galactic Nuclei

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    Using an extensive sample of nearby galaxies (the Nearby Galaxies Catalog, by Tully), we investigate the environment of the galaxies hosting low-luminosity AGNs (Seyferts and LINERs). We define the local galaxy density, adopting a new correction for the incompleteness of the galaxy sample at large distances. We consider both a complete sample of bright and nearby AGNs, identified from the nuclear spectra obtained in available wide optical spectroscopic surveys, and a complete sample of nearby Seyferts. Basically, we compare the local galaxy density distributions of the AGNs with those of non-AGN samples, chosen in order to match the magnitude and morphological type distributions of the AGN samples. We find, only for the early-type spirals more luminous than M\sim M^*, that both LINERs and Seyferts tend to reside in denser environments on all the scales tested, from tenths of Mpc to a few Mpc; moreover Seyferts show an enhanced small-scale density segregation with respect to LINERs. This gives support to the idea that AGNs can be stimulated by interactions. On larger scales, tens of Mpc, we find that the AGNs hosted in luminous early-type spirals show a tendency to stay near the center of the Local Supercluster. Finally we discuss the interpretations of our findings and their consequences for some possible scenarios of AGN formation and evolution and for the problem of how AGNs trace the large-scale structures.Comment: 16 pages+3 figures, uuencoded postscript file, preprint SISSA 76/94/A , ApJ November 20, 199

    Good news or bad news, which do you want first? The importance of the sequence and organization of Information for financial decision-making: a neuro-electrical imaging study

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    Investment decisions are largely based on the information investors received from the target firm. Thaler introduced the hedonic editing framework, in which suggests that integration/segregation of information influence individual's perceived value. Meanwhile, when evaluating the evidence and information in a sequence, order effect and biases have been found to have an impact in various areas. In this research, the influence of the Organization of Information (Integration vs. Segregation) and the Sequence of Information (Negative-Positive order vs. Positive-Negative order) on individual's investment decision-making both at the behavioral level (decision) and neurometrix level (measured by an individual's emotion and Approach Withdraw tendency) was assessed for the three groups of information: a piece of Big Positive Information and a piece of Small Negative Information, a piece of Big Negative Information and a piece of Small Positive Information, and a piece of Small Negative information. The behavioral results, which are an individual's final investment decision, were consistent for all three scenarios. In general, individuals will invest more/retire less when receiving two pieces of information in a Negative-Positive order. However, the neurometric results (Emotional Index, Approach Withdraw Index and results from LORETA) show differences among information groups. An effect of the Sequence of Information and the Organization of Information was found for the different scenarios. The results suggest that in the scenarios that involve large-scale information, the organization of information (Integration vs. Segregation) influences the emotion and Approach Withdraw tendency. The results of this investigation should provide insight for effective communication of information, especially when large-scale information is involved

    Has Delaware Become the New Eastern District of Texas? The Unforeseen Consequences of the AIA

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    To stem the rising tide of patent suits brought by non-practicing entities (NPEs), Congress enacted the anti-joinder provisions of the Leahy-Smith America Invents Act (AIA) while, at nearly the same time, the Federal Circuit issued a series of decisions making it easier for defendants to transfer multi-defendant cases filed by NPEs away from the Eastern District of Texas. The unexpected result of these initiatives, however, has been that NPEs have selected the District of Delaware as their new “forum of choice,” making it the most popular forum for patent litigation in the country and displacing the Eastern District of Texas

    Adaptive Street Lighting Predictive Control

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    Abstract In this paper an implementation of a smart predictive monitoring and adaptive control system for the public lighting have been carried out. The vehicular traffic flow acquired using a smart camera has been analyzed and several predictive methods have been studied. Then, a control strategy based on the given traffic forecasts and on the dynamical street class downgrade allowed by the law, has been implemented. Experimental results provided by a real life testbed showed that the proposed strategy has high potential energy savings without affecting safety

    Introduction to String Theory

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    These are the lecture notes of the introductory String Theory course held by one of the authors for the master program of Theoretical Physics at Turin University. The world-sheet approach to String Theory is pedagogically introduced in the framework of the bosonic string and of the superstring.Comment: 300+ pages, several figures. Comments are welcome. V2: typos and minor correction

    Has Delaware Become the New Eastern District of Texas? The Unforeseen Consequences of the AIA

    Get PDF
    To stem the rising tide of patent suits brought by non-practicing entities (NPEs), Congress enacted the anti-joinder provisions of the Leahy-Smith America Invents Act (AIA) while, at nearly the same time, the Federal Circuit issued a series of decisions making it easier for defendants to transfer multi-defendant cases filed by NPEs away from the Eastern District of Texas. The unexpected result of these initiatives, however, has been that NPEs have selected the District of Delaware as their new “forum of choice,” making it the most popular forum for patent litigation in the country and displacing the Eastern District of Texas
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