1,721,000 research outputs found
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
An Integrated Regional Data Management Center (IRDMC) in Emilia Romagna
No full textA survey on the sensor networks deployed on the
territory of Emilia Romagna has highlighted the
presence of thousands of sensors with different
purposes, different owners, not interoperable and
not shared.
The Integrated Regional Data Management Center
(IRDMG) aims the integration of all the sensors
spread all over the territory of the Emilia-Romagna
Region through two basic elements: a unified
communication infrastructure, integrating regional
fiber optic (Lepida) and mobile (ERretre) networks,
and a unique center for data collection
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
Messinian evaporite facies associations in the western Mediterranean
No full textThe detailed facies analysis of the Messinian evaporites in the western Mediterranean reveals the presence of many different depositional settings and associated deposits. Here we illustrate the characteristics of the most important facies associations in the framework of the age model of Roveri et al. (2008).Primary Lower Gypsum (PLG), 1st stage (5.96–5.6 Ma)The Primary Lower Gypsum consists of up to 16 gypsum/euxinic shales or carbonate lithological cycles. The basal cycles (1st-5th) are thicker massive selenite grading into banded selenite. The upper ones (6th-15th) consist of thinner beds showing a basal massive and banded selenite portion, followed by clusters of selenite crystals that grew laterally, grouped in branches projecting outward from a nucleation zone: the “branching selenite”.The PLG shows an impressive similarity in term of number of cycles, facies and stacking pattern, across the entire western Mediterranean (Lugli et al., 2006), allowing bed-by-bed correlations.The PLG cycles were probably deposited in less than 200 m-deep peripheral sub-basins and pass laterally in shallower settings into laminated limestone/organic-rich shales cycles (Gennari et al., this volume). In deeper poorly oxygenated settings the PLG equivalent deposits are dolomitic limestones interbedded with euxinic shales (Roveri et al., 2008; Manzi et al., 2007; this volume).Resedimented Lower Gypsum (RLG), 2nd stage (5.6–5.55 Ma; TG12-TG14)The clastic gypsum facies shows three main facies associations ranging from coarser- to fine-grained (Manzi et al., 2005; 2007; Roveri et al., 2006; 2008): i) chaotic deposits, “proximal” poorly evolved gypsum-shale flow deposit, including primary evaporite slabs, boulders and mountain-size blocks, debris flow and hyper-concentrated flow deposits. ii) lobe deposits from high to lows density gravity flows, made up of gypsarenites, silt and shales forming tabular or lenticular bodies. iii) drape deposits as the ultimate flow evolution products, consist of laminated gypsum interbedded with shales. The accumulation of such a wide spectrum of gravity-driven deposits was probably related to the formation of large submarine collapse and glide structures triggered by tectonically-induced gravitational instability.Calcare di base (CdB), 2nd stage (5.6–5.55 Ma; TG12-TG14)The “Calcare di Base” of the Caltanissetta basin is considered a calcareous evaporitic and microbial deposit belonging to the Lower Evaporites laterally equivalent of the primary selenite, that for some authors, in turn, is lateral equivalent of halite (Rouchy and Caruso, 2006). Its brecciated texture was related to in situ collapse produced by halite/gypsum dissolution (Decima et al., 1988). Our studies reveal that CdB is never associated with the primary selenite, but exclusively with clastic and laminated gypsum (RLG), suggesting deposition from mixed gravity flows. Individual carbonate beds commonly show low lateral persistency, are characterised by pinch-out terminations and show widespread bed gradation, erosional bases, load structures and clay chips, suggesting a clastic origin and moderate distance transport through high- to low-density gravity flows (Manzi et al., this volume).Halite, 2nd stage (5.6–5.55 Ma; TG12-TG14)Our new data suggest common sedimentary facies for the various Sicilian halite bodies (Lugli et al., 1999; Roveri et al., 2006; 2008). The halite deposits can be divided into two units: 1) a lower with halite, minor kainite and carnallite cumulite layers deposited in a relatively deep (below wave base) stratified water body with a strong shallowing upward trend, and 2) an upper halite one precipitated from a non-stratified, relatively shallow water body. The transition between these two units is marked by several mud/halite cycles that experienced meteoric dissolution and giant thermal contraction polygons by annual temperature fluctuations in subaerial conditions (Lugli et al., 1999). These features reveal the progressive rapid infill of relatively deep basins due to high halite sedimentation rates, culminating with complete desiccation. Then, a new halite phase developed in shallow water settings. The deposition of at upper part of the halite unit in the depocenters may be correlated to a gypsum cumulite horizon which underwent dehydration at the margins (Roveri et al., 2008; Manzi et al., 2009).Upper Evaporites, 3rd stage (5.55–5.33 Ma)The Upper Evaporites show a well-developed cyclic pattern of 9-10 lithological cycles (Manzi et al., 2009) starting with thin, laminated gypsum cumulates and gypsarenites developed on top of an alternation of fluvio-deltaic sandstone and shelfal shales. The top of seven of these cycles consists of primary selenitic gypsum, locally forming large domal structures. The Primary gypsum beds do not show branching selenite which is common in the LE. Banded selenite have been recognised only in the lowermost cycle. Calcareous stromatolites have never been found associated with these primary deposits. On the other hand, laminated gypsum, which always is present in the lower part of UE cycles, is not present in the LE.The UE overall thickness is commonly less than the LE. The UE unit is characterized by a thinner basal bed of banded selenite, overlain by a cluster of 5 thicker gypsum beds. A 7th bed, just below the “Arenazzolo” unit, is usually separated from this cluster by an argillaceous interval, locally more than 50 m thick and containing up two sandstone horizons; a Lago-mare faunal assemblage is commonly present in this interval.ReferencesCIESM, 2008. Workshop Monographs, 33, Monaco.Decima A., Mckenzie J.A., Schreiber B.C., 1988. Journal of Sedimentary Petrology, 58, 256-272.Lugli S. et al., 2006. Acta Naturalia De “L’Ateneo Parmense”, 42-2, A31 - RCMNS IC Parma 2006. Lugli S. et al., 1999. Journal of Sedimentary Research, v. 69, p. 764-771.Manzi V. et al., 2005. Sedimentology, v. 52, p. 875-902.Manzi V. et al., 2009. Sedimentology, doi: 10.1111/j.1365-3091.2009.01063.xManzi V. et al. 2007. Palaeogeography, Palaeoclimatology, Palaeoecology, 251, 470-499.Rouchy J.-M. & Caruso A., 2006. Sedimentary Geology, 188-189, 35-67.Roveri M. et al., 2006. Acta Naturalia De “L’Ateneo Parmense”, 42-1, 125-199.Roveri M. et al., 2008. Terra Nova, 20, 483-488
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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