1,720,970 research outputs found
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
Group algebras of metacyclic type
Get PDFLet Λ = Z[G] denote the integral group ring of a finite group G. In the first part of this thesis we consider the stable syzygies Ω_r(Z) over Λ. These are defined to be the stable classes of the intermediate modules in a free Λ-resolution of the trivial module Z. If we let p be an odd prime, then the groups of concern to us will be G_1 = D_2p which has free period 4, and G_2 = C_p ⋊ C_3 which has free period 6. Along the way it will also be necessary to consider the syzygies of the cyclic group C_n which has free period 2, the smallest possible nontrivial periodic resolution. The key point of note in each of these cases is that the augmentation ideal splits, thereby allowing us to show the existence of a diagonalised resolution. Moreover, there exist two strands corresponding to the action of the generators of C_p, and of either C_2 or C_3. For each strand we show there exists a group structure within the stable class generated by part of the first syzygy Ω_1(Z), and in which part of the zeroth syzygy Ω_0(Z) is the identity. In the second part of this thesis we make the jump to infinite groups. By setting G = C_p⋊C_q where p, q are prime such that q|p−1, we discuss the stably free modules over Z[G×F_n], where F_n denotes the free group of rank n. As we shall see, the stably free modules over this group ring are necessarily trivial; that is, they are free
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
Stably free modules over virtually free groups
Get PDFWe study stably free modules over various group rings Z[G], using the method of
Milnor patching. In particular, we construct innite sets of stably free modules
of rank one over various rings. Let Fn denote the free group on n generators. The
two classes of group rings under consideration are:
(i) Z[GxFn], where G is nite nilpotent and of non square-free order,
and n > 2;
(ii) Z[Q(12m) x C1], where Q(12m) is the binary polyhedral group
of order 12m.
The modules in question are constructed as pullbacks arising from bre square
decompositions of the group rings.
We also study the D(2)-problem of low-dimensional topology. We give
an affirmative answer to the D(2)-problem for the dihedral group of order 4n,
assuming the group ring Z[D4n] satisfies torsion free cancellation. By results of
Swan, Endo, and Miyata, this happens for a number of small primes n. Johnson
has shown that the groups D4n+2 satisfy the D(2)-property, but his result relies on
the fact that D4n+2 has periodic cohomology, a property not shared by D4n. This
forces us to introduce the torsion free cancellation hypothesis, and to explicitly
realize the group of k-invariants (Z/4n)
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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