6 research outputs found

    Primacy of Paper: The Importance of the Medium in Records Management

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    ABSTRACT This poster presents findings from a group ethnographic study of records managers at four different sites. At the site that is the focus of this analysis, research participants' tasks primarily consisted of examining individual case files to determine if the files should be kept or destroyed under the relevant rules set by records managers. Close observation of work practices showed that application of records management rules varied depending on the medium of the records. This study begins the work of bridging a gap between archival and records management policies for interactions with records across varying media, and empirical research on how people interact with objects on varying media

    21st Century Information Workers: What Core Competencies Should MSIS Students Learn?

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    The day-to-day work of information workers charged with information creation, organization, presentation, preservation, analysis, and retrieval is changing dramatically because of rapid advances in technology, the ubiquitous availability of information, and the increasing diversity and globalization of users, patrons, and co-workers. Further, the jobs themselves are changing, such that information workers are not likely to focus on one traditional information task, but must integrate other knowledge and skills, such as data analysis (with large data) and social media. The array of jobs and tasks leads us to ask: what are the core competencies for all information studies students? The authors conducted a survey of more than 2,000 information professionals focusing on six information work roles (archivy, data analysis, librarianship, records/digital assets management, social media, and user experience) to find out about their day-to-day work and their recommendations for formal curriculum. In this special session, we will organize a lively discussion debating professionals’ conflicting recommendations for formal iSchool curriculum.ye

    Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo

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    Advanced LIGO and Advanced Virgo are monitoring the sky and collecting gravitational-wave strain data with sufficient sensitivity to detect signals routinely. In this paper we describe the data recorded by these instruments during their first and second observing runs. The main data products are gravitational-wave strain time series sampled at 16384 Hz. The datasets that include this strain measurement can be freely accessed through the Gravitational Wave Open Science Center at http://gw-openscience.org, together with data-quality information essential for the analysis of LIGO and Virgo data, documentation, tutorials, and supporting software

    Search for intermediate-mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo

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    International audienceIntermediate-mass black holes (IMBHs) span the approximate mass range 100−105 M⊙, between black holes (BHs) that formed by stellar collapse and the supermassive BHs at the centers of galaxies. Mergers of IMBH binaries are the most energetic gravitational-wave sources accessible by the terrestrial detector network. Searches of the first two observing runs of Advanced LIGO and Advanced Virgo did not yield any significant IMBH binary signals. In the third observing run (O3), the increased network sensitivity enabled the detection of GW190521, a signal consistent with a binary merger of mass ∌150 M⊙ providing direct evidence of IMBH formation. Here, we report on a dedicated search of O3 data for further IMBH binary mergers, combining both modeled (matched filter) and model-independent search methods. We find some marginal candidates, but none are sufficiently significant to indicate detection of further IMBH mergers. We quantify the sensitivity of the individual search methods and of the combined search using a suite of IMBH binary signals obtained via numerical relativity, including the effects of spins misaligned with the binary orbital axis, and present the resulting upper limits on astrophysical merger rates. Our most stringent limit is for equal mass and aligned spin BH binary of total mass 200 M⊙ and effective aligned spin 0.8 at 0.056 Gpc−3 yr−1 (90% confidence), a factor of 3.5 more constraining than previous LIGO-Virgo limits. We also update the estimated rate of mergers similar to GW190521 to 0.08 Gpc−3 yr−1.Key words: gravitational waves / stars: black holes / black hole physicsCorresponding author: W. Del Pozzo, e-mail: [email protected]† Deceased, August 2020
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