339 research outputs found

    The New World of News Media

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    The New World of News Media

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    Bandiera Rossa: communists in occupied Rome, 1943-44

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    This study is a social history of communists in wartime Rome. It examines a decisive change in Italian communist politics, as the Partito Comunista Italiano (PCI) rose from a hounded fraternity of prisoners and exiles to a party of government. Joining with other Resistance forces in the Comitato di Liberazione Nazionale (CLN), this ‘new party’ recast itself as a mass, patriotic force, committed to building a new democracy. This study explains how such a party came into being. It argues that a PCI machine could establish itself only by subduing other strands of communist thought and organistion that had emerged independently of exiled Party leaders. This was particularly true in Rome, where dissident communists created the largest single Resistance formation, the Movimento Comunista d’Italia (MCd’I). This movement was the product of the underground that survived across the Mussolini period, expressing a ‘subversive’ politics that took on a popular following through the disintegration of the Fascist regime. Standing outside the CLN alliance and the postwar democratic governments, it reflected the maximalism and eclecticism of a communist milieu that had persisted on the margins of Fascist society. In the Occupation period this dissident movement galvanised a social revolt in the borgate slums, which would also trouble the new authorities even after the Allies’ arrival. Studying the political writing of these dissidents, their autodidact Marxism and the social conditions in which it emerged, this study reconstructs a far-reaching battle to redefine communist politics. Highlighting the erasure of the dissidents’ history in mainstream narration of the Resistance, it argues that the repressed radicalism of this period represented a lasting danger to the postwar PCI and the new Republic

    Meet the Press - Senator Edmund S. Muskie Interviewed on NBC Television

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    Senator Edmund S. Muskie interviewed on NBC\u27s Meet the Press. Discuss topics including the 1972 election and the Vietnam war

    Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

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    The reliability of electric transmission systems is examined using a scale-free model of network structure and failure propagation. The topologies of the North American eastern and western electric networks are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power system reliability analysis methods, and they suggest that scale-free network models are useful for estimating aggregate electric network reliability.Comment: 10 pages, 2 figures, 3 tables, accepted by Physica A in March 200

    Support for viral persistence in bats from age-specific serology and models of maternal immunity.

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    Spatiotemporally-localised prediction of virus emergence from wildlife requires focused studies on the ecology and immunology of reservoir hosts in their native habitat. Reliable predictions from mathematical models remain difficult in most systems due to a dearth of appropriate empirical data. Our goal was to study the circulation and immune dynamics of zoonotic viruses in bat populations and investigate the effects of maternally-derived and acquired immunity on viral persistence. Using rare age-specific serological data from wild-caught Eidolon helvum fruit bats as a case study, we estimated viral transmission parameters for a stochastic infection model. We estimated mean durations of around 6 months for maternally-derived immunity to Lagos bat virus and African henipavirus, whereas acquired immunity was long-lasting (Lagos bat virus: mean 12 years, henipavirus: mean 4 years). In the presence of a seasonal birth pulse, the effect of maternally-derived immunity on virus persistence within modelled bat populations was highly dependent on transmission characteristics. To explain previous reports of viral persistence within small natural and captive E. helvum populations, we hypothesise that some bats must experience prolonged infectious periods or within-host latency. By further elucidating plausible mechanisms of virus persistence in bat populations, we contribute to guidance of future field studies

    Behavioral Responses of a Parasitoid Fly to Rapidly Evolving Host Signals

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    Animals eavesdrop on signals and cues generated by prey, predators, hosts, parasites, competing species, and conspecifics, and the conspicuousness of sexual signals makes them particularly susceptible. Yet, when sexual signals evolve, most attention is paid to impacts on intended receivers (potential mates) rather than fitness consequences for eavesdroppers. Using the rapidly evolving interaction between the Pacific field cricket, Teleogryllus oceanicus, and the parasitoid fly, Ormia ochracea, we asked how parasitoids initially respond to novel changes in host signals. We recently discovered a novel sexual signal, purring song, in Hawaiian populations of T. oceanicus that appears to have evolved because it protects the cricket from the parasitoid while still allowing males to attract female crickets for mating. In Hawaii, there are no known alternative hosts for the parasitoid, so we would expect flies to be under selection to detect and attend to the new purring song. We used complementary field and laboratory phonotaxis experiments to test fly responses to purring songs that varied in many dimensions, as well as to ancestral song. We found that flies strongly prefer ancestral song over purring songs in both the field and the lab, but we caught more flies to purring songs in the field than reported in previous work, indicating that flies may be exerting some selective pressure on the novel song. When played at realistic amplitudes, we found no preferences–flies responded equally to all purrs that varied in frequency, broadbandedness, and temporal measures. However, our lab experiment did reveal the first evidence of preference for purring song amplitude, as flies were more attracted to purrs played at amplitudes greater than naturally occurring purring songs. As purring becomes more common throughout Hawaii, flies that can use purring song to locate hosts should be favored by selection and increase in frequency
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