1,721,096 research outputs found
Geomorphology, 106(1-2) (Special Issue "Recent developments in Surface and Subsurface Karst Geomorphology” May 2009)
No full textDe Waele J., Audra Ph., Plan L., guest-editors of the Special Issue "Recent developments in Surface and Subsurface Karst Geomorphology”, (164 pages, 14 papers
Folia in der Odelsteinhöhle, Steiermark – Erstnachweis im deutschsprachigen Raum
No full textFolia are speleothems resembling small inverted
rimstone dams on overhanging cave
walls. The present model assumes a genesis
below the water table by degassing of CO2
that leads to rising bubbles. Worldwide,
they are only known from some two dozens
caves, almost all of those caves are hypogenic
in origin. A new occurrence of typically
formed but small folia from Odelstein
cave in the Johnsbach valley (southern
Gesäuse Mountains) is described. The morphology
and the sediments of this cave are
characteristic for epigenic caves. Therefore
the source of the CO2 remains speculative
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
Recent developments in surface and subsurface karst geomorphology: an introduction
No full textWhere dissolution processes of bedrock dominate peculiar morphologies develop and overrule all landforms controlled by other surface processes. Pure karst landscapes are present in many parts of the world, but most of the time landscapes are shaped by a multitude of processes. The comprehension of the dissolution processes, that act both at the surface and underground, has developed rapidly in the last half century, although major achievements had already been reached at the end of the XIXth century. This special issue give an overview of some of the most recent developments in surface and subsurface karst geomorphology and reviews where further studies should be fostered
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
Geomorphology and natural hazards in karst areas: A review
No full textSince human beings started to colonise the world, slowly migrating
(in multiple directions) from the African Rift and ultimately
reaching the southernmost territories of the Americas, they have
interacted with the natural environment, using its resources and suffering
from its hazardous processes. Survival of mankind was possible
thanks to its ability to adapt to an ever-changing environment and its
capability to learn and communicate the new findings. From the earliest
times, geomorphic features and processes were an essential part
of social surviva
- …
