1,720,988 research outputs found
La grotto di Abate Eustasio (Pu 1789) nel contest dell’area carsica di Largo Porta Grande a Castellana-Grotte (Murge, Puglia).
Full text linkLa recente scoperta di una nuova cavità nella zona di Largo Porta Grande a Castellana-Grotte (Murge Basse, Puglia) consente di rivisitare i caratteri carsici di quella che è la zona topografi camente più depressa del territorio castellanese, anche alla luce della storia dei rapporti tra uomo ed eventi naturali in ambiente carsico. Largo Porta Grande ha una lunga storia di eventi alluvionali, che resero necessaria, a seguito di diverse catastrofi naturali, anche con vittime, la realizzazione di opere di ingegneria idraulica, fi nalizzate alla mitigazione del rischio idraulico. Nel 2011 la scoperta della grotta di Abate Eustasio ha ulteriormente dimostrato la ricchezza carsica del sottosuolo in questa zona, per di più evidenziata dai recenti dati di esplorazione della Voragine del Canalone. L’insieme di tale materiale documentario evidenzia, da un lato, la possibilità di ulteriori esplorazioni e, dall’altro, la necessità di tenere in debito conto la fragilità del territorio carsico in qualunque azione di pianifi cazione territoriale che si progetti e/o intenda realizzare nell’area. Questi aspetti risultano però alquanto in contrasto con l’ipotesi, a nostro avviso non realizzabile, né tantomeno utile alla comunità, della proposta di turisticizzazione della grotta di Abate Eustasio
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
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
Following flood dynamics by SAR/optical data fusion
Full text linkSynthetic aperture radar (SAR) acquisitions are particularly useful to produce flood maps thanks to their all-weather and day-night capabilities. However, repetition intervals of radar instruments are in the order of several days for routine operations, reaching daily or higher frequencies only in tasked conditions. Therefore, to follow flood dynamics, images acquired by different sensors at different times may be beneficial. In the present work, multi-temporal SAR intensity, InSAR coherence and optical data are considered to describe a flood event occurred in the Basilicata region (southern Italy) on December 2013. In this case study, optical data have a twofold role: they allow to follow the flood dynamics (because SAR and optical data have been acquired in different dates during the inundation event), and they add information concerning the land cover of the analyzed area. The data fusion approach is based on Bayesian Networks (BNs). It is shown that the synergetic use of different information layers can help detect more precisely the areas affected by the flood, reducing false alarms and missed identifications which may affect algorithms based on data from a single source. The produced flood maps are compared to reference maps, independently obtained; the comparison indicates that the proposed methodology is able to reliably follow the temporal evolution of the phenomenon, assigning high probability to areas most likely to be flooded, reaching accuracies of up to 89%
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
Report on relations between vegetation types derived from land cover maps and habitats. BIO SOS Biodiversity Multisource Monitoring System: from Space TO Species (BIO SOS) Deliverable D6.1, pp70 http://www.biosos.wur.nl/UK/Deliverables/
No full textD6.1 finds the relation between vegetation types derived from Land
Cover maps and habitat types related to the Habitat Directive and
other classification systems widely used in Europe for habitat
mapping. Three Land Cover class sets are compared and related to
the habitats of interest to select the class set providing an
unequivocal class description closest to habitat description and
consequently the most useful for the successive provision of Habitat
maps from Land Cover maps
On the use of temporal series of L- and X-band SAR data for soil moisture retrieval. Capitanata plain case study
No full textThis paper investigates the use of time series of ALOS/PALSAR-1 and COSMO-SkyMed data for the soil moisture retrieval (m(v)) by means of the SMOSAR algorithm. The application context is the exploitation of m(v) maps at a moderate spatial and temporal resolution for improving flood/drought monitoring at regional scale. The SAR data were acquired over the Capitanata plain in Southern Italy, over which ground campaigns were carried out in 2007, 2010 and 2011. The analysis shows that the m(v) retrieval accuracy is 5%-7% m(3)/m(3) at L- and X band, although the latter is restricted to a use over nearly bare soil only
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
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