63 research outputs found

    GRB 050223: A dark GRB in a dusty starburst galaxy

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    Aims: We aim at detecting and determining the properties of the host galaxy of the dark GRB 050223. Methods: We use VLT optical/NIR images coupled to Swift X-ray positioning, and optical spectra of the host galaxy to measure its properties. Results: We find a single galaxy within the Swift error box of GRB 050223. It is located at z = 0.584 and its luminosity is L ~ 0.4 L*. Emission lines in the galaxy spectrum imply an intrinsic SFR > 7 Msun/yr, and a large extinction A_V > 2 mag within it. We also detect absorption lines, which reveal an underlying stellar population with an age between 40 Myr and 1.5 Gyr. Conclusions: The identification of a host galaxy with atypical properties using only the X-ray transient suggests that a bias may be present in the former sample of host galaxies. Dust obscuration together with intrinsic faintness are the most probable causes for the darkness of this burst.Comment: 4 pages, 2 figures, accepted for publication in Astronomy & Astrophysic

    HIV subtype is not associated with dementia among individuals with moderate and advanced immunosuppression in Kampala, Uganda

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    HIV-associated neurocognitive disorders (HAND) are a common neurological manifestation of HIV infection. A previous study suggested that HIV dementia may be more common among patients with subtype D virus than among those with subtype A virus among HIV+ individuals with advanced immunosuppression. We conducted a study to evaluate the frequency of HIV dementia, and the association of HIV dementia with HIV subtype and compartmentalization among HIV+ individuals with moderate and advanced immunosuppression (CD4 lymphocyte count >150 cells/ÎĽL and < 250 cells/ÎĽL)

    Low incidence of SARS-CoV-2, risk factors of mortality and the course of illness in the French national cohort of dialysis patients

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    Doing Research on Populism

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    Matthijs Rooduijn argues that the focus on populism has become a self-perpetuating process, with whole research groups, conferences and journals dedicated to the topic. To help the public get a better understanding of populism, Rooduijn and other colleagues collaborated with The Guardian to produce an investigative series of articles on populism, a project that also led to the creation of The PopuList, which, thanks to country experts, categorises European political parties as populist, far right, far left and/or Eurosceptic. Rooduijn then describes the latest developments in the field, the current trends, and the fruitful contaminations between populism research and other fields

    Populism and nationalism revisited: A comparative study of the Spanish and Portuguese New Left

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    Current definitions of populism are insufficiently determinate. They fail to distinguish between populism and nationalism. We propose to remedy this problem by advancing a new definition of populism as the logic of democratic resentment. We apply this new definition to a comparison between Spain’s Podemos and Portugal’s Left Bloc (BE), which we classify as social carriers of populism. We make two contributions to the literature. First, our findings dispute existing characterisations of the Portuguese case, which fail to distinguish between populist and nationalist claim-making. Second, our analysis undermines depictions of Podemos as the consummate populist party in Iberia: in 2015, the little studied BE was a stronger populist carrier than Podemos. The analytical framework underpinning this conclusion offers a more refined approach to populism than the alternatives and sets a higher standard for empirical replication.Research Project “POPULUS – Rethinking Populism” (PDTC/SOC-SOC/28524/2017). Funded by: Foundation for Science and Technology, Portuguese Ministry for Science, Technology and Higher Education

    Observations of physical effects from tsunamis of December 30, 2002 at Stromboli volcano

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    On December 30, 2002, following an intense period of activity of Stromboli volcano (south Tyrrhenian Sea, Italy), complex mass failures occurred on the northwest slope of the mountain which also involved the underwater portion of the volcanic edifice for a total volume of about 2–3×107 m3. Two main landslides occurred within a time separation of 7 min, and both set tsunami waves in motion that hit the coasts of Stromboli causing injuries to three people and severe damage to buildings and structures. The tsunamis also caused damage on the island of Panarea, some 20 km to the SSE from the source. They were observed all over the Aeolian archipelago, at the island of Ustica to the west, along the northern Sicily coasts to the south as well as along the Tyrrhenian coasts of Calabria to the east and in Campania to the north. This paper presents field observations that were made in the days and weeks immediately following the events. The results of the quantitative investigations undertaken in the most affected places, namely along the coasts of Stromboli and on the island of Panarea, are reported in order to highlight the dynamics of the attacking waves and their impact on the physical environment, on the coastal structures and on the coastal residential zone. In Stromboli, the tsunami waves were most violent along the northern and northeastern coastal belt between Punta Frontone and the village of Scari, with maximum runup heights of about 11 m measured on the beach of Spiaggia Longa. Measured runups were observed to decay rapidly with distance from the source, typical of tsunami waves generated by limited-area sources such as landslides.Published450-461JCR Journalreserve
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