1,721,302 research outputs found
Bethe-lattice approach for electronegativity calculation in amorphous alloys and its correlation with the chemical shift: alpha-SiOx and alpha-SiNx cases
No full textWe have developed a new method for evaluating the electronegativities of solid alloys. They are described by a Bethe-lattice and for each single atom of the alloy Sanderson's electronegativity value has been adopted. The calculation proceeds in the spirit of the original model proposed by Lucovsky. However the present method makes use of an infinite lattice and in contrast with Lucovsky's one, perfectly satisfies the electronegativity equalization principle. We tested the model by evaluating the chemical shift of the Si 2p core level binding energies in silicon oxide and silicon nitride as a function of alloy composition obtaining a very good agreement with the experimental data. A comparison with the Lucovsky model shows that the present one is superior in predicting the chemical shifts and, therefore, can be regarded as a refinement of that model
Cyclable Cities: Building Feasible Scenario through Urban Space Morphology Assessment
No full textCycling is a climate-friendly, cost-effective, and greenhouse gas-efficient transport mode that produces relevant positive aspects to: urban innovation (new technology and services, that is, e-mobility and public bike-sharing systems), environment (reducing emissions, traffic congestion easing, increasing energy efficiency), public health (road safety, psycho-physical wellbeing, noise reduction), urban economy (infrastructure cost saving, low service and vehicle expenditures, energy saving, creation of sustainable green jobs), and inclusive society (improving inclusion of the local population, quality of life, wellbeing). Considering the 2014 Paris Declaration of the Transport, Health and Environment Pan-European Programme (THE PEP) for "the development of a pan-European Master Plan for cycling promotion,"it is necessary to implement support tools for urban planners and designers, who, simultaneously, provide a cognitive framework able to direct urban policymaking toward active mobility models/options and sustainable urban development processes. After highlighting the good practices of European cities related to the promotion of soft active mobility and modal split that contrast the use of private cars, this study presents a "morpho-syntactic"approach-based methodology apt at analyzing the city of Potenza (county seat of the Basilicata region, southern Italy) with the intention of producing a design scenario to develop urban cycling as an alternative urban development strategy. Geomorphological analysis-based techniques have been integrated with graph theory-based space-morphological analyses using the Space Syntax Analysis and the Place Syntax Analysis. The results obtained are useful to support a decision-making process for the development of an urban cycling infrastructure scheme that integrates Potenza's active transport infrastructures (mechanized pedestrian mobility) according to a multimodal approach. With the current national cycling supportive policy framework, local authorities are in a position to adopt strategies and actions aimed at promoting cycle-tourism and urban cycling, thus improving sustainable mobility policies as a component of urban planning
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
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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