1,721,604 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
The Linguists: Film Viewing and Discussion with Director Seth Kramer and Linguist David Harrison
Full text linkThe Linguists is a hilarious and poignant chronicle of two scientists — David Harrison and Gregory Anderson — racing to document languages on the verge of extinction. Of the world’s 7,000 languages, 40 percent are on their way to extinction, with the last fluent speaker of a language dying once every two weeks. In Siberia, India, and Bolivia, the linguists confront head-on the very forces silencing languages: racism, humiliation, and violent economic unrest.
David and Greg\u27s journey takes them deep into the heart of the cultures, knowledge and communities at risk when a language dies.https://thekeep.eiu.edu/humanitiescenter_meaningfulwork1011/1004/thumbnail.jp
Chiral pyridyl phosphinite catalysts and the development of structure selectivity relationships in the asymmetric hydrogenation of trisubstituted alkenes
Full text linkThe current trend in developing asymmetric catalysts is towards creating specialized molecules with tailored functions for increased selectivity in classes of substrates rather than general catalysts capable of broad application. In addition, the capacity to generate groups of catalysts with incremental changes to overall structure allows for a more detailed analysis of contributions to the structure selectivity relationships for a variety of substrates. This information can then be used to identify ideal catalysts or improve selectivity and activity of for a particular system.
Asymmetric hydrogenation of substituted alkenes with chiral iridium N,P complexes that were developed from the achiral Crabtree Complex have proven to be extraordinary selective and active catalysts. Screening a series of trisubstituted alkenes on 1st and 2nd generation catalysts indicated a strong enantioselectivity dependence on the phosphorus and pyridine substituents. In particular, the substituents in the ortho position of the pyridine ring were found to have significant control over the catalyst.
The synthesis of the 3rd generation of chiral pyridyl phosphinite catalysts takes advantage of a flexible late phase incorporation of the functional groups which govern the selectivity of the asymmetric hydrogenation to span a range of steric and electronic properties. The screening of these catalysts in the asymmetric hydrogenation of several classes of trisubstituted alkenes provided clear insight to the factors controlling enantioselectivity which were proven to vary greatly with the nature of the substrate and catalyst. Several catalysts with exceptional selectivity were identified for multiple examples of trisubstituted alkenes which had proven difficult with previous system
Variations on the Author
Full text link“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
Full text linkWe 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
Leading IS: A people business. Interview with David Harrison and Martyn Harrow
No full textInformation Services (IS) in higher education provide facilities that are crucial in supporting successful delivery of institutional strategies - not to mention day-to-day operations - in learning, teaching, research and business processes. Increasingly that strategic and operational importance is recognised with multimillion pound investments. It should be no surprise, then, that universities need to take the leadership, governance, management and development of their Information Services seriously. Few, however, have done so to the point of including, as Cardiff University has, the director of IS (Martyn Harrow, above right) as a strategic partner on the senior team with the clear objective that Information Services will make a defining, enabling contribution to the university’s success. Assistant director David Harrison is also chair of UCISA; developing IS people and IT professionalisation are high on his national agenda. Here Martyn and David talk to Dr Lesly Huxley about the step-change in approach that is helping IS make a difference.Information Services (IS) in higher education provide facilities that are crucial in supporting successful delivery of institutional strategies - not to mention day-to-day operations - in learning, teaching, research and business processes. Increasingly that strategic and operational importance is recognised with multimillion pound investments. It should be no surprise, then, that universities need to take the leadership, governance, management and development of their Information Services seriously. Few, however, have done so to the point of including, as Cardiff University has, the director of IS (Martyn Harrow, above right) as a strategic partner on the senior team with the clear objective that Information Services will make a defining, enabling contribution to the university’s success. Assistant director David Harrison is also chair of UCISA; developing IS people and IT professionalisation are high on his national agenda. Here Martyn and David talk to Dr Lesly Huxley about the step-change in approach that is helping IS make a difference
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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