1,721,210 research outputs found
Introduction:Aeolian sediments and environments (IAS Meeting, Schladming, Austria, 2012)
Full text linkThis special issue includes papers originally presented as part of the Scientific Session ‘‘Aeolian Sediments and Environments’’ during the 29th IAS Meeting of Sedimentology, September 10–13th, 2012 in Schladming, Austria. This scientific session was attended by an international community of geologists with interest in aeolian processes, environments and their complex depositional systems. Contributions dealing with multidisciplinary approaches to gaining an improved understanding of the controls operating on aeolian systems from both modern and ancient settings were received.Fil: Rodríguez Lopez, Juan Pedro. Universidad Complutense de Madrid; EspañaFil: Clemmensen, Lars B.. Universidad de Copenhagen; DinamarcaFil: Mountney, Nigel. University of Leeds; Reino UnidoFil: Veiga, Gonzalo Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentin
Field Trip Guidebook. IAS Copenhagen 1999. 19th Regional Meeting of Sedimentology, August 24-26
No full textIntegrated analysis of beach ridge and lagoon systems as indicator of sea-level changes
Full text linkBeach ridges and lagoons are common features of the modern coastal landscape in much of Denmark and represent
an important part of the Holocene raised marine deposits. We here present our results from investigations into the
possibilities of retrieving continuous relative sea-level (RSL) information from these sedimentary archives, as
facilitated by the analysis of surface morphology, coring, subsurface imaging, absolute chronology, and modern
analogues. The island of Samsø (55°51’N, 10°36’E) was chosen as a case study example. While each of the used
archives merely covers a part of the mid to late Holocene developments, their joint analysis allows identifying
and separating periods of rapid RSL rise, stability and fall over most of the island’s marine stage. We present
possible correlations of the data from the lagoons with data from a wide beach-ridge system and suggest causal
relations of the RSL reconstruction with the spatial arrangements of marine and glacial landforms on Samsø. The
integrated use of a geographical perspective combined with geological precision and methodology has proven to
be of great value for understanding temporal, spatial, and process relations in the investigated coastal environment.
The study stresses the value of analyzing genetically independent though complementary sedimentary archives to
retrieve more complete and potentially more robust results. The presented approach may be useful in microtidal,
sediment-surplus environments with a transgressive-regressive Holocene RSL history
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
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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