1,721,283 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
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
La sucesión sedimentaria siliciclástica del Cretácico superior del borde sur de la “Sierra de Guadarrama” (Madrid, España central): análisis de facies y reconstrucción paleoambiental
No full textThis study concerns the facies analysis and the reconstruction of depositional
environments of the basal, terrigenous portion of the Upper Cretaceous’s sedimentary succession,
located in the southern margin of the «Sierra the Guadarrama» Mountains (North of Madrid,
central Spain), which is a portion of the Spanish Central Mountain Chain called «Sistema Central».
The terrigenous deposits are constituted by three formations: the Arenas the Utrillas Fm
(Cenomanian), the Arenas y arcillas de Castro de Fuentidueña Fm (Turonian), and the Arenas y
arcillas de Segovia Fm (Early Coniacian). Six lithofacies associations where detected in the
Arenas de Utrillas Fm (Cenomanian), and interpreted as low sinuosity bed-load coarse sand river’s
deposits. The Arenas y arcillas de Castro de Fuentidueña Fm (Turonian) is constituted by 13
lithofacies associations. Their features support coastal depositional setting, as tidal or low energy
coastal environments. This formation represented a transgressive-regressive sedimentary cycle
and the autochthonous glaucony-rich deposits correspond to maximum flooding. In the Arenas y
arcillas de Segovia Fm (Earliest Coniacian), 8 lithofacies associations where recognized. Two
asociations, identified in the Soto del Real area, have been interpreted as fluvial deposits (located
in a very distant place from the other outcrops), while the other 6 lithofacies associations matched
to tidal depositional environment and represented the beginning of another sedimentary cycle,
also including the immediately superposed carbonate formation (Dolomías tableadas de Caballar
Fm). The acquired dates prompt to a paleoenviromental reconstruction in the study area: 1) a
fluvial depositional environments, flowing from NW to SE developed during the Cenomanian;
2) a marine transgressive-regressive cycle, which flooded the all studied area, took place during
Early-Middle Turonian; 3) and finally the beginning of a new transgressive cycle, characterized
the Early Conician record. Moreover, a morphologic step in the basement has been identifyed,
which could have strongly controlled the sedimentation
Analisi di facies dei depositi terrigeni del Cretaceo superiore del versante sud della "Sierra de Guadarrama" (Madrid, Spagna centrale): dati preliminari
No full textThis study concerns
the facies analysis and the reconstruction of depositional environments
of the basal, terrigenous portion of the Upper
Cretaceous sedimentary succession, located in the southern
margin of the «Sierra the Guadarrama» Mountains (North of
Madrid, central Spain), which is a portion of the Spanish central
Chain called «Sistema Central». The terrigenous deposits
studied, about 90 m tick, are constitued by three formations: the
«Arenas the Utrillas», the «Arenas y arcillas de Castro de Fuentidueña» and the «Arenas y arcillas de Segovia» wich age
is enclosed between Cenomanian and Early-Middle Coniacian.
The «Arenas de Utrillas» (Cenomanian), mainly constituted by
sandstones and conglomerates, are related to a braided bedload
coarse sand river. Paleocurrent analysis evidences at least,
within the “Arenas de Utrillas” formation, the presence of
three fluvial systems flowing about side by side.
The «Arenas y arcillas de Castro de Fuentidueña» (Early
Turonian-Early Coniacian) record a transgressive-regressive
sedimentary cycle first characterized by clay and sandstone
deposited in a coastal environment dominated by tidal processes.
A phase of maximum flooding is evidenced by the development
of autochtonous glaucony-rich deposits while the transition
to tidal deposits represents the final regressive phase.
The «Arenas y arcillas de Segovia» (Early-Middle Coniacian),
which lie disconformably above The «Arenas y arcillas de
Castro de Fuentidueña», represented the beginning of another
sedimentary cycle with a development of another marine
transgression. The sedimentary features observed match with
coastal tide-dominated depositional environment except for a
small area, that was not flooded by marine waters, and where
are preserved the laterally equivalent deposits in fluvial facies
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
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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