1,720,994 research outputs found

    A sustainable archiving software solution for The Language Archive

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    [Archive X] has been developing a language archiving solution for more than 15 years now. The software is not only aimed at archiving and access but also integrates with a range of exploitation tools. This in house built solution was created from the ground up, since at the time no mature open source repository solutions were available. The situation today is rather different, with several widely used repository system solutions available, including open source solutions that are maintained by communities of developers. Since [Archive X] is now in a situation where it needs to reduce the number of staff required for the maintenance of its archiving software, it was decided to develop a new system based on one of the widely used open source repository solutions such as Fedora Commons (1) or DSpace (2). In this paper we will describe the process of selecting the most suitable open source repository solution as the basis for [Archive X]. This includes the specification of the functional and technical requirements and their prioritization, as well as the evaluation of a number of repository solutions. This evaluation also includes an assessment of the long-term perspective of those solutions. None of the existing repository solutions can provide the complete minimal functionality that [Archive X] requires from its archiving software. This means that additional components or modules need to be developed or adapted from the current software, regardless of the chosen repository solution. Still, we expect that using an existing extensible repository system as a basis will be less costly in the long run. Several language archives, in particular those that serve as centers (3) within the CLARIN consortium, have already implemented different repository systems based on either DSpace or Fedora Commons. Their experiences and recommendations are also taken into account for the evaluation of the various options. The final decision on which repository system will form the basis of the new archiving software will be taken by the end of September 2014. The development of the new archiving software will then start soon after that and a production-ready version will need to be finished by October 2016 at the latest. (1) http://fedorarepository.org/ (2) http://www.dspace.org/ (3) https://centerregistry-clarin.esc.rzg.mpg.de

    Achieving the MDGs – A Note

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    The material and symbolic importance of these targets make it vital to assess the analytical coherence of the Millennium Development Goals (MDGs) “project”. In this spirit, this paper highlights complexities and difficulties of the MDG approach. Specifically, it outlines a framework for analysing the MDGs and subsequently discusses measuring progress; achieving and valuing multi-dimensional outcomes; sustainability; devising policies during structural transformation; and implementing policies in a decentralised policy system. These discussions draw attention to limitations of current methods of analysing the MDGs. Indeed, the history of today’s rich countries shows that development is a drawn out, uneven and contradictory process full of reversals and discontinuity. The MDGs, with their ambitious, linear, broad, and essentially ahistorical set of socio-economic goals belie this complexity; contemporary developed countries measured yesterday with today’s MDG yardstick might well have been branded “failures”.Millennium Development Goals(MDGs), development policy, Tinbergen’s rule, structural transformation

    Higher order initial conditions with massive neutrinos

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    The discovery that neutrinos have mass has important consequences for cosmology. The main effect of massive neutrinos is to suppress the growth of cosmic structure on small scales. Such growth can be accurately modelled using cosmological N-body simulations, but doing so requires accurate initial conditions (ICs). There is a trade-off, especially with first-order ICs, between truncation errors for late starts and discreteness and relativistic errors for early starts. Errors can be minimized by starting simulations at late times using higher order ICs. In this paper, we show that neutrino effects can be absorbed into scale-independent coefficients in higher order Lagrangian perturbation theory (LPT). This clears the way for the use of higher order ICs for massive neutrino simulations. We demonstrate that going to higher order substantially improves the accuracy of simulations. To match the sensitivity of surveys like DESI and Euclid, errors in the matter power spectrum should be well below 1 per cent⁠. However, we find that first-order Zel’dovich ICs lead to much larger errors, even when starting as early as z = 127, exceeding 1 per cent at z = 0 for k > 0.5 Mpc^−1 for the power spectrum and k > 0.1 Mpc^−1 for the equilateral bispectrum in our simulations. Ratios of power spectra with different neutrino masses are more robust than absolute statistics, but still depend on the choice of ICs. For all statistics considered, we obtain 1 per cent agreement between 2LPT and 3LPT at z = 0.The discovery that neutrinos have mass has important consequences for cosmology. The main effect of massive neutrinos is to suppress the growth of cosmic structure on small scales. Such growth can be accurately modelled using cosmological NN-body simulations, but doing so requires accurate initial conditions (ICs). There is a trade-off, especially with first-order ICs, between truncation errors for late starts and discreteness and relativistic errors for early starts. Errors can be minimized by starting simulations at late times using higher-order ICs. In this paper, we show that neutrino effects can be absorbed into scale-independent coefficients in higher-order Lagrangian perturbation theory (LPT). This clears the way for the use of higher-order ICs for massive neutrino simulations. We demonstrate that going to higher order substantially improves the accuracy of simulations. To match the sensitivity of surveys like DESI and Euclid, errors in the matter power spectrum should be well below 1%. However, we find that first-order Zel'dovich ICs lead to much larger errors, even when starting as early as z=127z=127, exceeding 1% at z=0z=0 for k>0.5 Mpc1k>0.5\text{ Mpc}^{-1} for the power spectrum and k>0.1 Mpc1k>0.1\text{ Mpc}^{-1} for the equilateral bispectrum in our simulations. Ratios of power spectra with different neutrino masses are more robust than absolute statistics, but still depend on the choice of ICs. For all statistics considered, we obtain 1% agreement between 2LPT and 3LPT at z=0z=0

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

    Appropriate Similarity Measures for Author Cocitation Analysis

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    We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis

    Dispelling the Myths Behind First-author Citation Counts

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    We conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more sophisticated methods
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