1,720,988 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
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
Genoa ‘the Superba’ old city - Unesco World site - geomorphological heritage
No full textThe coastal city of Genoa is an increasingly popular tourist destination due to its landscape and cultural aspects. Between 1099 and 1815, Genoa was a maritime republic with naval power and it is today the largest harbour in Italy and the second in the Mediterranean. There are, however, some less known aspects of Genoa cultural heritage connected to urban geomorphology and geo-diversity; in addition to the existing landscape and artistic values, these could constitute another element of interest for tourists and residents. Due to historical and recent urban sprawl, the former morphology of Genoa (the ‘Superba’) which contributed to the city military and economic success, is today largely invisible. The stratification of urban sprawl phases characterises many ancient cities in the Mediterranean: despite centuries of human intervention, however, the original features of the territory can still be recognized in present-day landscapes. This study shows the results of long-standing geomorphological surveys carried out in Genoa which allowed a detailed reconstruction of the geomorphological setting of the historical centre, a Unesco World Heritage site since 2006 In addition, this investigation allowed us to identify some sites of geological-environmental and geomorphological interest which are worth of being conserved and promoted for tourism. In particular, we identified three thematic urban trails on the hydro-geomorphological evolution of Genoa historical centre and the environmental-geological settings which conditioned the development of the city: the ‘vertical Genoa trail’, on the funicular Zecca-Righi and along the old ‘creuze’, in order to underline the slopes’ verticality; the ‘Waterways trail’, along the final stretch of the old aqueduct and many historical fountains; the ‘Genoa zero trail’, which develops from east to west across the old centre, looking for traces of the city’s old morphology under the current urban cover. These three trails show how history, urbanisation and geomorphological features of the area are strictly connected. Their promotion for tourism purposes aims to facilitate the understanding and divulgation of what we know about Genoa’s geomorphology, alongside with other important features of interests such as the coastal landscape and the cultural and historical heritage
MAN-MADE LANDFORMS SURVEY AND MAPPING IN AN URBAN HISTORICAL CENTER ON COASTAL MEDITERRANEAN ENVIRONMENT
No full textThis paper documents the evolution of the urban geomorphological setting of the historical heart of the city of Genoa (Liguria, Italy). Since the Middle Ages, the city and its harbour have progressively grown, reaching their greatest extent in the 1950s. Today it has an area of 8.5 km2 and it includes seven small catchments with surfaces ranging from 0.5 to 2.4 km2. Their urbanized surface ranges from just less than 30% up to more than 80%. Human interventions have almost completely reshaped and modified the original morphology. The identification of artificial landforms built over the former natural landforms was carried out through multi-temporal cartographical and photographical comparison, and the analysis of geo-thematic cartography and documentation by the Basin Master Plan (Piano di Bacino) and Genoa City Hall Plan. In addition stratigraphy data from the regional database were analysed and several geomorphological surveys were carried out in the area. Artificial landforms were mapped by applying an experimental geomorphological classification currently being developed by the Working Groups of the Italian Association of Physical Geography and Geomorphology (AIGEO). The main geomorphic modifications are: slope fillings retained by walls (mainly due to roads and buildings); excavation areas (often connected to historical quarries); sea embankments (for harbour growth) and artificial modifications of the drainage network (culverts, stream diversions and canals). All of these reduced the flow sections. These morphological changes have significantly increased the geo-hydrological risk in Genoa, which is currently one of the most emblematic Italian case studies for recurrent flood events, especially in the light of the modified rainfall regime due to recent climate change
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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