1,721,069 research outputs found
The palaeoecological record of delta dynamics: testing the faunal response of benthic foraminifers and ostracods
No full textThe mid-late Holocene subsurface succession of the Po River plain records complex delta outbuilding under a predominantly autogenic control during the sea-level high stand phase. Chronologically constrained phases of the Po Delta evolution represent a solid base to test the response of microfossils to short time-scale delta dynamics. Benthic foraminifers and ostracods from the 21m-thick shallow-marine succession of core EM13 were quantitatively analysed and statistically compared to modern North Adriatic meiofaunal assemblages, in order to assess the main palaeoecological factors that controlled the composition of assemblages, and compare the palaeoenvironmental resolution provided by these two benthic groups.
Benthic foraminifers from the lowermost shallow-marine succession indicate the transition from inner shelf to coastal conditions, marked by the gradual increase in Ammonia tepida and Ammonia parkinsoniana. Ostracods from the same stratigraphic interval are comparable to those nowadays recorded in shallow-marine settings affected by relatively low river flows. Chronologically in accordance with the development of cuspate deltas during the Roman Age, benthic foraminifers record the approach to coastal environments, subject to low fluvial inputs as evidenced by ostracods. The overlying deposits with high frequencies (ca. 50%) of A. tepida and A. parkinsoniana suggest the transition to a proximal prodelta, as confirmed by the similarity with modern assemblages at shallow depths, few km far from the river mouths. Upwards, the overwhelming dominance of the same taxa is indicative of extreme vicinity to river mouths. Within the same stratigraphic portion, ostracods indicate conditions similar to those nowadays present along the mid-Adriatic Italian coast, where the dominant action of longshore current distributes river-supplied material enriched in organic matter. Following one of the main avulsion events in the Po Delta history (XII century), the transition from wave- to fluvially dominated deltaic systems is marked by a great change in ostracod assemblages. Therefore, distinct palaeoecological information are provided by each fossil group: benthic foraminifers give indications about the distance from river mouths, whereas the dominant depositional regime is suggested by ostracods. Benthic foraminifers and ostracods are excellent palaeoenvironmental indicators in river-influenced shelves, but refined sub-environmental characterization can be achieved with their combined application only
sj-docx-1-hol-10.1177_09596836221131696 – Supplemental material for A 5000-year record of relative sea-level change in New Jersey, USA
No full textSupplemental material, sj-docx-1-hol-10.1177_09596836221131696 for A 5000-year record of relative sea-level change in New Jersey, USA by Jennifer S Walker, Tanghua Li, Timothy A Shaw, Niamh Cahill, Donald C Barber, Matthew J Brain, Robert E Kopp, Adam D Switzer and Benjamin P Horton in The Holocene</p
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
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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