1,721,142 research outputs found
10Be surface exposure dating of the last deglaciation in the Aare Valley, Switzerland
Full text linkThe combined Rhone and Aare Glaciers presumably reached their last glacial maximum (LGM) extent on the Swiss Plateau prior to 24 ka. Two well-preserved, less extensive moraine stades, the Gurten and Bern Stade, document the last deglaciation of the Aare Valley, yet age constraints are very scarce. In order to establish a more robust chronology for the glacial/deglacial history of the Aare Valley, we applied 10Be surface exposure dating on eleven boulders from the Gurten and Bern Stade. Several exposure ages are of Holocene age and likely document post-depositional processes, including boulder toppling and quarrying. The remaining exposure ages, however yield oldest ages of 20.7 ± 2.2 ka for the Gurten Stade and 19.0 ± 2.0 ka for the Bern Stade. Our results are in good agreement with published chronologies from other sites in the Alps.Fil: Wüthrich, Lorenz. University of Bern; SuizaFil: Garcia Morabito, Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio. Universidad Nacional de Río Negro. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; Argentina. University of Bern; SuizaFil: Zech, Jana. University of Bern; SuizaFil: Trauerstein, Mareike. University of Bern; SuizaFil: Veit, Heinz. University of Bern; SuizaFil: Gnägi, Christian. University of Bern; SuizaFil: Merchel, Silke. Helmholtz-zentrum, Dresden-rossendorf, Deutschland; AlemaniaFil: Scharf, Andreas. Helmholtz-Zentrum; AlemaniaFil: Rugel, Georg. Helmholtz-Zentrum; AlemaniaFil: Christl, Marcus. Eidgenössische Technische Hochschule Zürich; SuizaFil: Zech, Roland. University of Bern; Suiz
Erfahrungen bei der Messung von Kohlenstoff in Siliciumcarbid - was geht, was geht nicht?
No full text
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
- …
