1,720,993 research outputs found
Characterization of rock mass by geostatistical analysis at the Masua Mine ( Sardinia, Italy).
No full textThe purpose of the present paper is to show the application of geostatistical analysis to rock mass characterization, with the Masua Mine (Sardinia, Italy) being the case study. Following a brief description of geostatistical methods and use of 'Variograms' and 'Kriging', the criteria applied for quantification of rock mass properties are discussed. The analysis of rock mass data by geostatistical procedures allows one to infer the variability of rock quality such as defined by the RMR index. Additionally, the deformability and strength parameters are obtained for numerical modelling of mine structures. It is stated that the use of geostatistical methods such as 'Kriging' is more likely to reflect the expected rock mass mechanical behaviour.-from Author
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
Translational slope instabilities in weak rock
No full textThis paper examines the problem of translational slope instabilities occurring in complex geological formations of weak rock as are typical of the Langhe region in Italy. Unstable rock volumes slide along slightly dipping planar surfaces that are formed where adjacent layers of marI and sand are in contact. Four sites were identified and examined. Special attention was devoted to the development of a laboratory method able to simulate the behaviour of the thin layer of marI which is deemed to play an active role in these phenomena in conjunction with the sand layers providing a preferential path for groundwater circulation: Direct shear tests were carried out and the results obtained show that the fundamental role played in instability phenomena by
the destructuring effect of water on marI cannot be taken into account through the customary laboratory techniques
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Finite element analysis of a deep-seated slope deformation
No full textA study is presented of the slow time dependent movement of the deep-seated deformation of Rosone. This rock slope, which mainly consists of gneiss, is located on the Italian side of Western Alps and has been a ̈ected by recurrent instability phenomena. Due to these, and also to the presence of various villages and man-made structures (such as a hydroelectric power plant), a signi®cant amount of geological and geomechanical data has been collected
in this area. They have led to the assumption that the slow movement develops along a deep-seated sliding surface, involving a volume of rock between 22 and 35 million cubic
meters. To check these hypotheses, and to get some insight into the causes of the phenomenon,
a series of non-linear, time-dependent analyses has been carried out through the ®nite
element method. The slow movement of the rock mass, and the gradual loss of its mechanical
properties with increasing deformation, has been accounted for in the calculations by means
of a visco-plastic constitutive law, allowing for strain softening e ̈ects. The results of analyses
lead to some conclusions on the causes of the observed movements, among which the possible in ̄uence of the groundwater pore pressure is likely to play an important role
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