1,721,005 research outputs found
Water column raw data (Kongsberg EM 122 entire dataset) of RV MARIA S. MERIAN during cruise MSM39
No full textRaw water-column data were collected using the ship's own Kongsberg EM122 multibeam echosounder during the RV MARIA S. MERIAN cruise MSM39 (Linking past and present in the North Atlantic). The cruise took place between 2014-06-07 and 2014-06-25 (St. John's, Canada – St. John's, Canada). The main goals of the cruise were to study the modern deep water spreading from the Labrador Sea to the Laurentian Fan and to obtain sediment cores to investigate the history of subtropical/subpolar gyre interactions and deep-water formation. Bathymetry and water-column data were collected throughout the whole cruise along with the sub-bottom profiling (Parasound) data in order to find suitable coring locations and to get an overview of deposition regimes and mechanisms. Two sound velocity profiles (SVPs) were collected using the ship's own AML oceanographic sound velocity probe: one in working area A south west of Grand Banks, one in working area B south east of Grand Banks. However, the measured SVPs used for the downslope and upslope transects were not accurately representing sound velocity in shallow waters leading to strong artificial beam deformation in water depths shallower than 500 m. The data are archived at the Federal Maritime and Hydrographic Agency of Germany (Bundesamt für Seeschifffahrt und Hydrographie, BSH) and provided to PANGAEA database for data curation and publication
Multibeam bathymetry raw data (Kongsberg EM 122 entire dataset) of RV MARIA S. MERIAN during cruise MSM39
No full textRaw bathymetry data were collected using the ship's own Kongsberg EM122 multibeam echosounder during the RV MARIA S. MERIAN cruise MSM39 (Linking past and present in the North Atlantic). The cruise took place between 2014-06-07 and 2014-06-25 (St. John's, Canada – St. John's, Canada). The main goals of the cruise were to study the modern deep water spreading from the Labrador Sea to the Laurentian Fan and to obtain sediment cores to investigate the history of subtropical/subpolar gyre interactions and deep-water formation. Bathymetry was collected throughout the whole cruise along with the sub-bottom profiling (Parasound) data in order to find suitable coring locations and to get an overview of deposition regimes and mechanisms. Two sound velocity profiles (SVPs) were collected using the ship's own AML oceanographic sound velocity probe: one in working area A south west of Grand Banks, one in working area B south east of Grand Banks. However, the measured SVPs used for the downslope and upslope transects were not accurately representing sound velocity in shallow waters leading to strong artificial beam deformation in water depths shallower than 500 m. The data are archived at the Federal Maritime and Hydrographic Agency of Germany (Bundesamt für Seeschifffahrt und Hydrographie, BSH) and provided to PANGAEA database for data curation and publication. Data are unprocessed and therefore contain incorrect depth measurements (artifacts). Data can be processed e.g. with the open source software package MB-System (Caress, D. W., and D. N. Chayes, MB-System: Mapping the Seafloor, http://www.mbari.org/products/research-software/mb-system/, 2022)
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
Multichannel reflection seismic data from the Lower Bengal Fan, Profile GeoB97-020-027
No full textUtilizing a novel dataset of integrated high‐resolution multichannel seismic data with IODP Expedition 354 drilling results, a Middle to Late Pleistocene stratigraphy for the lower Bengal Fan is developed. The study reveals a high lateral and temporal variability of deposition expressed by lateral shifts (often exceeding 100 km) between successive channel‐levee systems (CLSs), which occurred on average every ~15 kyrs independent from sea‐level changes. The CLSs are embedded in sheeted sediments deposited out of unchannelized turbidity currents, which represent almost two thirds of the lower Bengal Fan sediments. On 100‐kyrs time‐scales, CLSs and sheeted/unchannelized sediments build up subfans, which alternately occupied the western and the eastern Bengal Fan, while the remaining area was draped by ~10‐20 m thick layers of background/hemipelagic sediments. Three subfans have been reconstructed: Subfan B (1.24‐0.68 Ma) formed concurrently with the Middle Pleistocene Hemipelagic Layer (MPHL), Subfan C (0.68‐0.25 Ma) covered the entire study area, and Subfan D (0.25 Ma – recent) deposited concomitant with the Late Pleistocene Hemipelagic Layer (LPHL). The continuous succession of subfans indicates an uninterrupted fan activity independent from sea‐level cycles at least since the Middle Pleistocene. This remarkable independent behavior in terms of sediment supply has not been observed at the Amazon Fan but is in agreement with observations from the Congo Fan.
Finally, the analysis of a complete cross‐section through the lower Bengal Fan reveals that almost half of the sediment represents sands, indicating that the lower Bengal Fan may not generally be classified as 'mud‐rich' (≤30% sand)
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
Der Bengalfächer auf verschiedenen räumlichen und zeitlichen Skalen : Die Integration seismoakustischer Daten mit IODP Expedition 354 Daten zur Untersuchung interner und externer Einflüsse auf Ablagerungsprozesse
No full textSubmarine fans are regarded as excellent archives for long- and short-term climate variations and the continental uplift/erosion history. The Bengal Fan has attracted particular scientific attention as is it the primary sink of Himalayan material and, thus, recorder of one of the key areas in the global climate system. A comprehensive understanding of the fana s complex depositional dynamics is an essential prerequisite to ultimately connect changes in the sedimentary sink with changes in the source. The here presented thesis examines the depositional dynamics of the Bengal Fan. A unique, integrated dataset of echosounder and multichannel seismic data, results from IODP Expedition 354 drilling, and a novel, system-specific age-depth model enables an overarching study of the architecture, stratigraphy, and depositional processes of the Bengal Fan and channel-levee systems at various scales. The outcome of this thesis provides new insights into the architectural and stratigraphic evolution of the lower Bengal Fan and marks a significant advancement towards an extensive understanding of the sedimentary archive in is full complexity
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