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Going 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
Hydrogeological protection of non karstic fractured aquifers
No full textThe paper deals about the
mapping of contribution and well-head protection areas for springs discharging out from non karstic
fractured aquifers. In the specifi c case we refer to mainly sedimentary hard rock aquifers occurring
in Northern Apennines (Italy): they are represented by turbidites and arenites, and by ophiolites at a
lower extent, characterized by high heterogeneity and anisotropy in the hydraulic conductivity distribution.
Groundwater fl ow numerical modeling, by the adoption of Equivalent Porous Medium (EPM)
approach, is presented as the most suited and robust tool in order to locate, according to a physically
based approach, contribution and protection areas of springs; the main mandatory prerequisites
are the availability of a reliable geological model derived from a detailed geological survey of the
area and the occurrence of multi-year time series of continuous monitoring of spring discharge. The
presented case study is about a main public water supply spring and, at the same time, a Groundwater
Dependent Ecosystems (GDE) of paramount importance in the area. The application is preceded
by a review of different methodologies employed to map non karstic spring contribution and
protection areas, updated with recent references. The recharge area derived by numerical modeling
has an extension of about 2.40 km2, this area produces an average spring fl ow rate of 12.43 l/s.
Spring protection areas were defi ned by the envelop of the 60 days and 365 days travel times. Their
extensions are, respectively, 1.6% and 11.4% of the recharge area. Finally, the infi ltration coeffi cient,
above the contribution area, resulted equal to 17%. At the end of the article a hybrid methodology to
map contribution and protection areas of springs in a mountainous non karstic setting is proposed
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
Il Bacino Terziario Epimesoalpino e le sue implicazioni sui rapporti tra Alpi e Appennino
No full textThe Priabonian and Rupelian successions that crop out in the Tertiary Piedmont Basin (TPB, NW Italy) and in the epi-Ligurian Basin (Northern Apennines) are part of a large episutural basin formed along the inter nai margin of the Western Alps after the Ligurian or Mesoalpine collisional event. This basin, referred to herein as the Tertiary epi-Mesoalpine Basin (TEMB), is the counterpart of the classic "trilogie priabonienne" ofL. Moret (Cal caires Nummulitiques, Marnes Bleues, and Gres d'Annot) in the external margin of the Western Alps (Chaines sub alpines). The TPB is the marginai portion of the TEMB recording a very complex synsedimentary tectonic evolu tion which involved the reactivation of Mesoalpine thrusting along the Sestri-Voltaggio, the Villalvernia-Varzi-Ot tone and the Monferrato fronts. The TPB succession can be subdivided into five informai stratigraphic units (from base to top: Pizzo d'Oca, Rio Trebbio, Molare-Borbera, Valla-Persi and Monastero units) bounded below and above by regionally extensive upper Eocene (M. Piano Mari) and upper Oligocene (Rocchetta Formation and Rigoroso Mari) mudstone units. These mudstone units are thought to record periods of crustal inflection associateci with the Mesoalpine and the eariy Apenninic phases of thrusting respectively. The sedimentary and tectonic evolution of the TPB includes the following six main stages. (l) Bartonian and Priabonian transgression associateci with thrust-re lated subsidence and followed by the deposition of Priabonian turbidites (Pizzo d'Oca Unit); this stage is only re corded on top of internai Alpine units (Ligurides). The transgression is thought to be related to a regional or glo bal sea level rise that affected both the Alpine and the Pyrenean-Provençal domains. The turbidites of the Pizzo d'Oca Unit were probably fed by the Corsica and Sardinia massifs, suggesting that the Alpine system was stililarge ly submerged at the end of the Mesoalpine Phase of thrusting. (2) Thrusting of the Valtri Group onta internai Al pine units (Ligurides) and their eariy TEMB cover (Marne di M. Piano, Pizzo d'Oca and Rio Trebbio units). Dur ing this phase, the Sestri-Voltaggio line was apparently reactivated as a transpressive zone. From the end of this phase (Ligurian Phase II) onward, the Valtri Group acted as a relative "high" during sedimentation. (3) Extensional tec tonics related to the opening of the Balearic Basin concomitantly with (4) the depositian of thick successions of fiood dominated, alluvial and shallow-marine conglomerates and sandstones grading upward into bioturbated and fossi liferous mudstones. Contrary to previous interpretations, these transgressive strata (Molare-Borbera Unit) are char acterized by a depositional setting and palaeocurrent directions delineating a transgression from the south (Balear ic Basin) and Alpine source areas located in the north. These Alpine units undergoing subaerial erosion are related to thrusting of stage (2). (5) Tectonic inversion of the previous extensional setting resulting into the cannibalization of the transgressive deposits of stage (4) and their resedimentation into small, fault-bounded troughs through south eriy-derived gravity flows. This stage, recorded by the Valla-Persi Unit, leads to basin inversion and the ensuing for mation of rapidly subsiding basins in the north. (6) Thick accumulations of turbidites (Monastero Unit) followed by regional drowning and basin starvation (Rocchetta Formation and Rigoroso Mari). This final stage is thought to record the inflection of the Adria plate and the beginning of the Apenninic wedge. The external portion of the TEMB is the M. Piano-Ranzano Basin of the Northern Apennines, entirely lying on internai Alpine units (Ligurides). Part of an intermediate domain between the M. Piano-Ranzano Basin and the TPB is stili preserved in the eastern sec tor of the latter, indicating an area of substantial uplift ("Antola High") associateci with the reactivation of the Vil lalvernia-Varzi-Ottone front during the Ligurian Phase II. The originai relations between this intermediate sector and the M. Piano-Ranzano Basin were completely obliterated by subsequent thrusting and subaerial erosion along the Villalvernia-Varzi-Ottone front. Although deposited in a permanently deep-marine environment and therefore of more difficult interpretation, the turbidite deposits of the Ranzano Sandstone can be cleariy subdivided into un conformity-bounded units which are correlateci herein with the main evolutionary stages of the TPB. Spectacular chaotic units (Specchio Unit) record renewed thrusting associateci with the tectonic inversion of the TPB (stage 5; Ligurian Phase III). Detailed correlatian patterns of selected outcrop areas show facies and thickness changes of turbidite strata produced by virtually continuous structural deformation. The Priabonian and Rupelian strata of the TEMB pose a series of problems involving the boundary between the Alps and the Apennines. Since they predate the late Oligocene and Neogene foredeeps of the Apennines, these sediments are an epi-Mesoalpine succession and have no temporal and spatial relations with the epi-Ligurian Basin of the Northern Apennines, a younger basin de veloped on top of Ligurian thrust sheets already involved in an Apenninic wedge. The TEMB is actually a transi tional and stili pooriy understood feature between the Mesoalpine Phase of deformation and the beginning of the Apenninic wedge with its associateci foredeeps. Much of the story and significance of the TEMB is thus probablyhidden in the sub-Ligurian Canetolo Basin, i.e. an equally poorly understood palaeogeographic and tectonic domain, originally separating the Ligurian Basins from the Tuscan Realm
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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