1,720,975 research outputs found
Reconstruction of Holocene glacier history from distal sources: glaciofluvial stream-bank mires and a glaciolacustrine sediment core near Sota Saeter, Breheimen, southern Norway
No full textComments on Jansson, K.N. and Glasser, N.F. (2008) “Modification of peripheral mountain ranges by former ice sheets: The Brecon Beacons, southern UK,” Geomorphology 97, 178–189
No full textCurrent research issues related to post-wildfire runoff and erosion processes
No full textPost-wildfire effects were first reported in the USA in the 1930s and only later was research into the topic carried out elsewhere in the world. These effects are usually temporary, heterogeneous in time and space, sensitive to thresholds, and involve a variety of processes, which have typically been monitored using a variety of techniques. This variability in cause and effect have affected the success of post-fire research, but the large quantity of data from field monitoring that has now been collected from across the world would suggest that it ought now to be possible to assemble all the findings and improve our understanding of post-wildfire runoff and erosion responses. To achieve this goal, it is necessary to identify and place in order of priority the current issues facing post-wildfire runoff and erosion research. The most important issues are the need to: (1) identify both similarities and differences between post-wildfire responses around the world so that common patterns and generalities able to explain cause and effect relationships can be identified; (2) identify and quantify relationships between fire effects and the soil hydraulic properties that best able to represent the unusual conditions operating post-fire; (3) determine on burned terrain the effect of temporally and spatially variable rainstorms, often the main cause of enhanced post-wildfire runoff and erosion; (4) find functional relationships between precipitation, basin form, runoff connectivity, contributing area, surface roughness, depression storage, and sediment properties required in order to predict the timing, scale and duration of, for example, floods and debris flows from unmonitored burned basins; and (5) develop standard measurement methods so that comparable runoff and erosion data can be collected in the future. Resolving these issues can be expected to help in improving conceptual and computer models of post-wildfire runoff and erosion
The Schmidt hammer as a relative-age dating tool and its potential for calibrated-age dating in Holocene glaciated environments
No full textCosmogenic 10Be and 26Al ages of Holocene moraines in southern Norway II: evidence for individualistic responses of high-altitude glaciers to millennial-scale climatic fluctuations
No full textGoing 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
Variations on the Author
Get PDF“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
Get PDFWe 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
- …
