1,721,184 research outputs found
Planktic foraminiferal oxygen isotope and Mg/Ca- and alkenone-derived sea surface temperature records of sediment core GeoB22229-1 and GeoB22230-1 from R/V SONNE expedition SO256 in the Coral Sea offshore NE Australia
No full textThis dataset contains records of planktic foraminifera (Globigerinoides ruber) stable oxygen isotopes, and Mg/Ca-derived and alkenone-derived sea surface temperature estimates of gravity cores GeoB22229-1 (15.46°S, 145.91°E, water depth 1443 m) and GeoB22230-1 (15.44°S, 145.87°E, water depth 968 m), which were retrieved during the R/V SONNE expedition SO-256 in the Coral Sea, offshore NE Australia. The combined records of the two cores cover the last glacial-interglacial cycle. Age control points (AMS 14C ages and tie points based on the alignment of the stable oxygen isotope record to the benthic stack of Lisiecki and Stern (2016; doi:10.1002/2016PA003002)) are provided as well
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
Planktic foraminiferal oxygen isotopes, Mg/Ca and Mg/Ca-derived SST estimates of sediment cores GeoB22229-1
No full textPlanktic foraminiferal oxygen isotopes, Mg/Ca and Mg/Ca-derived SST estimates of sediment core SO256_29-1 (GeoB22229-1). Oxygen isotope analyses were carried out by the isotope laboratory of MARUM, University of Bremen, on a Finnigan MAT 251 mass spectrometer, which is connected with automatic lines for carbonate preparation. Isotope data were calibrated against the international Vienna Pee Dee Belemnite (VPDB) standard by using an in‐house carbonate standard, which has been calibrated to the National Bureau of Standards 19 standard. The long‐term analytical standard deviation is below ±0.07‰. Sample preparation for Mg/Ca followed the procedure of Barker et al. (2003, doi:10.1029/2003GC000559). Mg/Ca measurements were performed at MARUM, University of Bremen, on an Agilent Technologies 700 Series Inductively Coupled Plasma Optical Emission Spectrophotometer (ICP-OES), which is connected to a Cetax ASX 520 autosampler. To convert Mg/Ca to temperature, we applied the species-specific Mg/Ca-temperature calibration of Anand et al. (2003; doi:10.1029/2002PA000846) with an assumed exponential constant of 0.09
Isotopes and alkenone-derived sea-surface temperature records of sediment core GIK18252-3
No full textPlanktonic foraminiferal oxygen isotopes (δ¹⁸O), UK'37 and UK'37-derived SST of sediment core GIK18252-3 from the South China Sea (SCS). Planktonic foraminiferal δ18O values (versus Pee Dee belemnite standard) were determined on 20 - 25 specimens of G. ruber (white) sensu stricto (size fraction 250-400µm) at the Leibniz Laboratory at the University of Kiel. Sample preparation and UK'37 measurements were done at the Leibniz Laboratory at the University of Kiel. UKʹ37 was converted to temperature using the temperature calibration of Pelejero and Grimalt (1997; https://doi.org/10.1016/S0016-7037(97)00280-9). The record covers the past ~15.9 kyr
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
AMS-14C ages of sediment core GIK18252-3
No full textAMS-14C ages of planktonic foraminifera tests (T. sacculifer) of sediment core GIK18252-3. The radiocarbon age determinations were carried out at the Tandetron AMS facility at the Leibniz Laboratory at the University of Kiel, following standard procedures (Nadeau et al., 1997; Schleicher et al., 1998)
Planktic foraminiferal oxygen isotopes, Mg/Ca and Mg/Ca-derived SST estimates of sediment cores GeoB22229-1
No full textPlanktic foraminiferal oxygen isotopes, Mg/Ca and Mg/Ca-derived SST estimates of sediment core SO256_29-1 (GeoB22229-1). Oxygen isotope analyses were carried out by the isotope laboratory of MARUM, University of Bremen, on a Finnigan MAT 251 mass spectrometer, which is connected with automatic lines for carbonate preparation. Isotope data were calibrated against the international Vienna Pee Dee Belemnite (VPDB) standard by using an in‐house carbonate standard, which has been calibrated to the National Bureau of Standards 19 standard. The long‐term analytical standard deviation is below ±0.07‰. Sample preparation for Mg/Ca followed the procedure of Barker et al. (2003, doi:10.1029/2003GC000559). Mg/Ca measurements were performed at MARUM, University of Bremen, on an Agilent Technologies 700 Series Inductively Coupled Plasma Optical Emission Spectrophotometer (ICP-OES), which is connected to a Cetax ASX 520 autosampler. To convert Mg/Ca to temperature, we applied the species-specific Mg/Ca-temperature calibration of Anand et al. (2003; doi:10.1029/2002PA000846) with an assumed exponential constant of 0.09
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