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Site 1220
No full textSite 1220 (10°10.600´N, 142°45.503´W; 5218 meters below sea level (mbsl); Fig. F1) forms a southerly component of the 56-Ma transect drilled during Leg 199. It is situated about midway between the Clipperton and Clarion Fracture Zones in typical abyssal hill topography. On the basis of regional magnetic anomalies, we anticipated basement age at Site 1220 to be equivalent to Chron C25n (~56 Ma; Cande et al., 1989), slightly older than at Site 1219. At the outset of drilling at Site 1220, our estimate for total sediment depth was ~225 meters below seafloor (mbsf) (Fig. F2).
Based upon a fixed hotspot model (Gripp and Gordon, 1990, for 0- to 5-Ma Pacific hotspot rotation pole; Engebretson et al., 1985, for older poles), Site 1220 should have been located ~3° south of the equator at 56 Ma and in an equatorial position at 40 Ma. Thus, Site 1220 should have been situated underneath the South Equatorial Current in the early Eocene. A nearby piston core (EW9709-13PC) taken during the site survey cruise recovered >16 m of red clay, with the base of the core dated as middle-early Miocene on the basis of radiolarian biostratigraphy (Lyle, 2000).
Site 1220 will be used to study equatorial ocean circulation from the late Paleocene through the late Eocene during the early Cenozoic thermal maximum. Sediment records from this site will help to define the calcite compensation depth (CCD) and lysocline during the Paleocene-Eocene and Eocene-Oligocene transitions. In this and other respects, Site 1220 will act as an interesting analog to Site 1218. Both sites are thought to have been located on the equator at ~40 Ma, but the older crustal age anticipated at Site 1220 dictates a greater paleowater depth than for contemporaneous sediments accumulating at Site 1218
Damiette, 1220
No full textDamiette, 1220. La cinquième croisade et l’Apocalypse arabe de Pierre dans leur contexte nilotiqueLa découverte de textes prophétiques par la cinquième croisade à Damiette en 1220 est en général étudiée en relation avec la quête du Prêtre Jean, avec lequel les croisés rêvèrent, à partir de 1221, d’une alliance. Cet article revient à la source de ces textes, l’Apocalypse arabe de Pierre, pour expliquer ces prophéties dans leur contexte premier, africain et nilotique. Les textes apocalyptiques doivent alors être compris comme une tentative, sans doute de la part de certains membres de la communauté copte, d’inclure les Francs dans les rapports de force entre Ayyoubides, Nubiens et Éthiopiens, en pleine recomposition en ce début du xiiie siècle.Damietta, 1220. The Fifth Crusade and the Arabic Apocalypse of Peter Within their Nilotic ContextThe discovery of prophetic texts by the Fifth Crusade in Damietta in 1220 is mostly studied in relation to the quest for Prester John, with whom the crusaders sought an alliance from 1221. This paper goes back to the text’s first source, the Arabic Apocalypse of Peter, in order to explain the prophecies in their original African and Nilotic context. The apocalyptic texts must therefore be understood as an attempt, probably made by some members of the Coptic community, to introduce the Franks in the balance between Ayyubids, Nubians, and Ethiopians, deeply modified at the beginning of the thirteenth century
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
Introduction du dossier spécial « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »
No full textInternational audienceIntroduction of the Dossier « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »Introduction du Dossier « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »
Introduction du dossier spécial « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »
No full textInternational audienceIntroduction of the Dossier « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »Introduction du Dossier « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »
Introduction du dossier spécial « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »
No full textInternational audienceIntroduction of the Dossier « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »Introduction du Dossier « Le fonctionnement matériel des couvents mendiants en Europe centrale (vers 1220-vers 1550) : bilan historiographique »
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