1,746,171 research outputs found
Re-evaluation of the age model for North Atlantic Ocean Site 982 – arguments for a return to the original chronology
No full textRecently, the veracity of the published chronology for the Pliocene section of North Atlantic Ocean Drilling Program Site 982 was called into question. Here, we examine the robustness of the original age model as well as the proposed age model revision. The proposed revision is predicated on an apparent mis-identification of the depth to the Gauss-Matuyama (G/M) polarity chronozone reversal boundary (2.581 Ma) based on preliminary shipboard paleomagnetic data and offers a new chronology which includes a hiatus between ~3.2 and 3 Ma. However, an even more accurate shore-based, u-channel-derived polarity chronozone stratigraphy for the past ~2.7 Ma supports the shipboard composite stratigraphy and demonstrates that the original estimate of the depth of the G/M reversal in the Site 982 record is correct. Thus, the main justification forwarded to support the revised chronology no longer exists. We demonstrate that the proposed revision results in a pronounced anomaly in sedimentation rates proximal to the proposed hiatus, erroneous assignment of marine-isotope stages in the Site 982 Pliocene benthic stable oxygen isotope stratigraphy, and a markedly worse correlation of proxy records between this site and other regional paleoclimate data. We conclude that the original chronology for Site 982 is a far more accurate age-model than that which arises from the published revision. We strongly recommend the use of the original chronology for all future work at Site 982
Articolo 2391
No full textIl contributo fornisce un commento al nuovo articolo 2391 del codice civile
Commento all'art. 2391 bis del codice civile
No full textL'Autore commenta l'art. 2391 bis del codice civile in materia di operazioni con parti correlate
Commento all'art. 2391-bis del codice civile
No full textL'Autore commenta l'art. 2391-bis c.c. in materia di operazioni con parti correlate relativamente alla società per azioni
Commento all'art. 2391 del codice civile
No full textL'Autore commenta l'art. 2391 del codice civile in materia di conflitto di interessi degli amministratori di società per azion
Commento all'art. 2391 del codice civile
No full textGli Autori commentano l'art. 2391 c.c. in materia di interessi degli amministratori di società per azioni
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
Binaridad en IC 2391
Get PDFSe han medido alrededor de 10 espectrogramas por estrella de 31 miembros del cúmulo abierto IC 2391 con el objeto de detectar las binarias espectroscópicas de corto período. Los resultados preliminares indican dos objetos SB2, cuatro SB1 y probablemente un par de objetos con períodos largos. Se discute la incidencia de binarias en este cúmulo con respecto a la correlación entre el porcentaje de las mismas y v sen(i).Asociación Argentina de Astronomí
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