1,720,961 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
Coastal lagoon systems as indicator of Holocene sea-level development in a periglacial soft-sediment setting: Samsø, Denmark.
No full textConfined shallow-water environments are encountered many places along the coast of the inner Danish waters.
Despite their common occurrence, these environments have rarely been studied as sedimentary archives. In this
study we set out to trace back changes in relative sea-level and associated geomorphological responses in sediment
cores retrieved from coastal lagoon systems on the island of Samsø, central Denmark.
In the mid-Atlantic period, the post-glacial sea-level rise reached what is today the southern Kattegat Sea. Waves,
currents and tides began to erode the unconsolidated moraine material and melt-out deposits. This initiated
sedimentation in adjacent coastal lagoons and further supported the formation of coastal barriers. Until present
day, the ongoing isostatic uplift caused a continuous drop of relative sea-level resulting in shoreline accretion and
successive lagoonal infilling.
Stratigraphy, grain-size distribution, fossil and organic matter content of cores retrieved from the lagoons were
analyzed and compared. Age control was established using radiocarbon and optically stimulated luminescence
dating.
Our data produced a surprisingly consistent pattern for the sedimentary successions found in the lagoons. The
period of initial transgression can be identified as the onset of deposition of fine-grained, organic-rich sediments.
However, radiocarbon dates evidence a punctuation of these deposits further upcore. Grain-size analysis suggests
that the reworking and abrasion of the lagoon sediments resulted from the gradual lowering of the wave-base.
The core sequence is topped-off by marine sands and wind-blown deposits. Based on these findings, we suggest
a conceptual model that allows inferring age and elevation of transgressive and regressive stages from the lagoon
cores.
The common occurrence of similar environments distributed along gradients of isostatic uplift/subsidence
(approximately +0,5 to -0,5 mm/yr) in the south-western Baltic, makes coastal lagoon systems a valuable archive
for the reconstruction of Holocene sea-level and coastal evolution
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
Coastal lagoon sediments as a recorder of Holocene landscape evolution and sea-level development: Samsø, southern Kattegat Sea, Denmark.
No full textConfined shallow-water environments are encountered many
places along the coast of the inner Danish waters. Despite their
common occurrence, these environments have rarely been
studied as sedimentary archives. In this study we set out to trace
back changes in relative sea-level and associated geomorphological
responses in sediment cores retrieved from coastal lagoon
systems on the island of Samsø.
In the mid-Atlantic period, the post-glacial sea-level rise
reached central Denmark. Waves, currents and tides began to
erode the unconsolidated moraine and melt-out deposits. This
initiated the formation of coastal barriers and marine lagoonal
sedimentation. Until present day, the ongoing isostatic uplift
caused a gradual drop of relative sea-level resulting in shoreline
accretion and lagoonal infilling.
Stratigraphy, grain-size distribution, fossil and organic matter
content of cores retrieved from the lagoons were analyzed and
compared. Age control was established using radiocarbon and
optically stimulated luminescence dating.
Our data produced a surprisingly consistent pattern for the
sedimentary successions found in the lagoons. The period of
initial transgression can be identified as the onset of deposition
of fine-grained, organic-rich sediments. However, radiocarbon
dates evidence a punctuation of these deposits further upcore.
Grain-size analysis suggests that the reworking and abrasion of
the lagoon sediments resulted from the gradual lowering of the
wave-base. The core sequence is topped off-by marine sands
and wind-blown deposits. Based on these findings, we suggest
a conceptual model that allows inferring age and elevation of
transgressive and regressive stages from the lagoon cores.
The common occurrence of similar environments distributed
along gradients of isostatic uplift/subsidence (approximately
+0.7 to -0.5 mm/yr) in the south-western Baltic, makes coastal
lagoon systems a valuable archive for the reconstruction of Holocene sea-level and coastal evolution
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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