1,721,355 research outputs found
Understanding the Hydrolysis Mechanism of Ethyl Acetate Catalyzed by an Aqueous Molybdocene: A Computational Chemistry Investigation
No full textMinistry of Science and Innovation (Spain) [CTQ2010-18231]; University of Oviedo (Spain) [UNOV-08-BECDOC
On the Mechanism of the [Cp2Mo(OH)(OH2)](+)-Catalyzed Nitrile Hydration to Amides: A Theoretical Study
No full textWe are grateful to the Ministry of Science and Innovation (Spain) for financial support (Project CTQ2010-18231). E.T. also thanks the University of Oviedo (Spain) for a grant (ref.UNOV-08-BECDOC
The Constraint Satisfaction Problem: Complexity and Approximability (Dagstuhl Seminar 18231)
Get PDFConstraint satisfaction has always played a central role in computational
complexity theory; appropriate versions of CSPs are classical complete
problems for most standard complexity classes. CSPs constitute a very rich and
yet sufficiently manageable class of problems to give a good perspective on
general computational phenomena. For instance, they help to understand which
mathematical properties make a computational problem tractable (in a wide
sense, e.g., polynomial-time solvable, non-trivially approximable,
fixed-parameter tractable, or definable in a weak logic). In the last decade,
research activity in this area has significantly intensified and hugely
impressive progress was made.
The Dagstuhl Seminar 18231 "The Constraint Satisfaction Problem: Complexity and
Approximability" was aimed at bringing together researchers using all the
different techniques in the study of the CSP so that they can share their
insights obtained during the past three years. This report documents the
material presented during the course of the seminar
Influence of the N-N Coligand: C-C Coupling Instead of Formation of Imidazol-2-yl Complexes at {Mo(eta(3)-allyl)(CO)(2)} Fragments. Theoretical and Experimental Studies
No full textFinancial support from the Ministerio de Economi ay Competitividad (Projects CTQ2010-18231, CTQ2012-37370-C02-01, and CTQ2012-37370-C02-02) is gratefully acknowl-edged. J.D. thanks the Fundacion Computacion y Tecnologias Avanzadas de Extremadura (COMPUTAEX) for computing resources
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Unmasking the action of phosphinous acid ligands in nitrile hydration reactions catalyzed by arene-ruthenium(II) complexes
No full textThis work was financially supported by the Ministerio de Economía y Competitividad (MINECO) of Spain (projects CTQ2010-18231, CTQ2013-40591-P, and CTQ2014-51912-REDC) and the Gobierno del Principado de Asturias (project GRUPIN14-006). E.T.-M. thanks MECD and the European Social Fund (ESF) for the award of a FPU fellowship
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