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On the fate of the Antarctic Slope Front and the origin of the Weddell Front
No full textData from the Deep Ocean Ventilation Through Antarctic Intermediate Layers (DOVETAIL) and Antarctic Large-Scale Box Analysis and the Role of the Scotia Sea (ALBATROSS) projects are combined in the region of the Antarctic Peninsula and the South Scotia Ridge to determine the paths and transports associated with the Antarctic Coastal Current, the Antarctic Slope Front, and the Weddell Front. The Antarctic Coastal
Current flows over the Antarctic continental shelf and is not tied to a particular isobath. It transports ~1 Sv westward to the Bransfield Strait. Its subsequent course is uncertain, but we speculate that it may continue southwest along the western side of the Antarctic Peninsula, close to the coast. The Antarctic Slope Front, present almost all the way around
Antarctica tied to the continental slope, has not previously been mapped after it reaches the tip of the Antarctic Peninsula. We show that the frontal jet splits into two branches in the northwest Powell Basin where the isobaths diverge. The shoreward portion of the water associated with the front (lying above isobaths shallower than 1500 m) is able to cross the South Scotia Ridge and head northwestward and retains many of the properties of the Antarctic Slope Front. It is associated with a transport of ~7 Sv. The portion of the front constrained to lie above isobaths deeper than 1500 m becomes the Weddell Front. This takes a path around the northern Powell Basin and south of the South Orkney Islands. Of the ~13 Sv that circulates around the southern flank of the South Orkney Plateau, ~8 Sv of Weddell Sea Deep Water and Warm Deep Water leaves the front to continue west. The remaining shallow and intermediate water retroflects and returns south associated with the Weddell Front through the Orkney Passage. Approximately 5–7 Sv is transported eastward associated with the Weddell Front, tied closely to the southern flanks of the Bruce and
Discovery Banks above the 2000–2500 m isobaths, and forming the southern boundary of the Weddell Scotia Confluence
Miocene deep-water agglutinated foraminifera from the Lomonosov Ridge and the opening of the Fram Strait
No full textDeep-water agglutinated Foraminifera (DWAF) were recovered from Miocene to Pliocene sediments in 103 samples
from IODP Hole M0002A on the Lomonosov Ridge. The First Occurrence of DWAF in Hole M0002A is observed just above the color change corresponding to the boundary between Lithological Subunits 1/4 and 1/5 in Core section –44X-1. The foraminiferal record of Hole M0002A consists entirely of agglutinated benthic species, largely sparse assemblages containing Cyclammina pusilla and Alveolophragmium polarensis. The faunal succession in Hole M0002A is subdivided into three assemblages based on the stratigraphic
ranges of characteristic taxa: (1) a relatively diverse assemblage at the base of Lithological Subunit 1/4 (Cores 44X-1 to –38X), with abundant agglutinated foraminifera including Reticulophragmium pusillum and Ammolagena clavata, indicating connections with the
North Atlantic. This assemblage displays the best preservation, which is here attributed to higher concentrations of dissolved silica in pore waters (2) A less diverse assemblage characterized by Alveolophragmium polarensis with Adercotryma agterbergi, in the lower
part of Lithological Subunit 1/3 (Cores –38X to –35X); (3) a sparse residual assemblage within Lithological Subunit 1/3 with Rhabdammina spp., A. polarensis and R. pusillum indicating poor preservation of organically-cemented DWAF in Cores –34X to –10X.
A comparison of the DWAF assemblages from the Lomonosov Ridge with previously studied Miocene assemblages from ODP
Hole 909C in the Fram Strait, Norwegian-Greenland Sea (Kaminski et al. 2005), suggests that the inflow of Atlantic intermediate water into the Arctic Ocean began prior to 17.5 Ma
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
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
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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