1,721,012 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
The porcine poly(rC)-binding protein 2 (PCBP2) gene maps to chromosome 5
No full textA recombinant clone was isolated at random from a skeletal muscle cDNA library. The sequence of the resulting 598 bp insert (EMBL accession number X94253) was compared in EMBL and GenBank databases using BLASTN2. The comparisons showed the highest matches with mouse and human PCBP2 cDNAs (mouse X75947, mouse X97982, human X78136 and mouse L19661; BLASTN probability were 1·9e-182, 1·1e-176, 1·6e-174 and 4·7 e-172, respectively). Excluding two gaps that could be due to alternative splicing, the deduced porcine protein sequence revealed the complete identity with corresponding human ( X78136) and mouse ( L19661) sequences. The mouse sequences X75947and X97982showed only one amino acid difference (Arg instead of Gly) with the deduced amino acid sequence of the porcine cDNA clone isolated. The cDNA was used as probe for in situ hybridization and for RFLP analysis in three generation reference populations. Both approaches assigned this gene to porcine chromosome 5
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
Assignment of the troponin C2 fast gene (TNNC2) to porcine chromosome bands 17q2.1· q2.2 by in situ hybridization
No full textAssignment of troponin C2, fast (TNNC2) gene to porcine chromosome bands 17q21-q22 by in situ hybridizatio
Linkage assignments of the porcine ATP1A2, ATP1B1 and V-ATPase (CGI-11) genes to chromosome 4
No full textNa+, K+-ATPase (EC 3.6.1.37) is a membrane-bound enzyme responsible for the ATP-dependent counter transport of sodium and potassium ions across the plasma cell membrane. The molecule is composed of two subunits: a catalytic alpha subunit and a regulatory beta subunit. A gene for subunit alpha, ATP1A2, and a gene for subunit beta, ATP1B1, have been physically assigned to porcine chromosome 4. The vacuolar H+-ATPase (ATP6; V-AT Pase; EC 3.6.1.34) is a multisubunit enzyme that translocates protons into intracellular organelles or across the plasma membrane of specialized cells against an electrochemical gradient. The gene for porcine 54- and 56-kDa V-ATPase subunit isoforms (V-ATPase or CGI-11, according to the temporary human nomenclature) was assigned to chromosome 4q1.4-q1.6. As these three genes are located on porcine chromosome 4, where QTLs for growth and carcass traits have been found, we integrated these loci into a more detailed linkage map by means of SSCP or PCR-RFLP analyses
The porcine proteasome subunit A4 (PSMA4) gene: Isolation of a partial cDNA, linkage and physical mapping
No full textA partial cDNA clone encoding the porcine proteasome subunit A4 (PSMA4 or proteasome subunit C9) has been isolated from a porcine muscle cDNA library and sequenced. A biallelic TaqI RFLP was identified in Large White, Landrace and Duroc breeds. Moreover, the 3'-untranslated region of the gene showed a triallelic SSCP. By linkage analysis the PSMA4 locus was assigned to pig chromosome 7 and by radioactive in situ hybridization this locus was mapped to the region 7q13-q14
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