1,721,006 research outputs found
Manganese Nodule and Surface Sediment Compositions: DOMES Sites A, B, And C
No full textManganese nodules and associated sediment from the equatorial North Pacific have been examined to ascertain relations between nodule abundance, texture, and composition, and sediment composition, lithology and acoustic stratigraphy. Nodules are most abundant in areas where the uppermost acoustically transparent layer of sediment is less than approximately 15 m thick. Abundance drops off sharply in areas where this acoustic unit is thicker than 20 m.
Nodules have average Zn/Mn and Co/Mn ratios which are approximately the same as these ratios for the component of sediment soluble in hydroxylamine hydrochloride-acetic acid. The relations between Cu and Mn and Ni and Mn in the sediment are also approximately the same as in nodules, but only for those nodules which have a smooth surface texture. Granular nodules have relatively more Ni and Cu. Antimony in nodules, similar to Ni, Cu, and Zn, is strongly correlated with Mn, whereas Co, Hf, Th, and U are strongly correlated with Fe.
The insoluble component of sediment has a uniform composition which is similar to the composition of terrigenous shale. This similarity holds for the major oxides as well as for Co, Cr, Zn, Hf, Sb, Th, U, Sc, Cs, Rb, and Ta
(Tables 1, page 287) REE chemical composition of manganese nodules from the Pacific and Indian oceans
No full text(Tables 1, page 287) REE chemical composition of manganese nodules from the Pacific and Indian ocean
Annotated record of the detailed examination of Mn deposits from the R/V Thomas G. Thompson Cruise 28 in the Pacific Ocean
No full textAnnotated record of the detailed examination of Mn deposits from the R/V Thomas G. Thompson Cruise 28 in the Pacific Ocea
Description of sediment cores from R/V Oceanographer cruises RP-23-OC77 and RP-1-OC78 in the DOMES, Site A area
No full text(Table 8) Elemental composition of manganese nodules recovered in box cores at DOMES Site A determined by Atomic Absorption Spectroscopy (AAS)
No full textAnnotated record of the detailed examination of Mn deposits from R/V Oceanographer cruises RP-23-OC77 and RP-1-OC78 in the DOMES, Site A area
No full textAnnotated record of the detailed examination of Mn deposits from R/V Oceanographer cruise RP-1-OC70 in the Equatorial Pacific Rise
No full textAnnotated record of the detailed examination of Mn deposits from R/V Oceanographer cruise RP-1-OC70 in the Equatorial Pacific Ris
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
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