1,720,990 research outputs found
Approccio prestazionale per la valutazione della vulnerabilità sismica di gallerie sotterranee
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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
I-BIM based approach for geotechnical and numerical modelling of a conventional tunnel excavation
No full textVery recently the Building Information Modeling (BIM) design approach has landed in the infrastructure field, giving life to the I-BIM, the BIM for the infrastructures, including geotechnical underground works likes tunnels. In this framework, the present paper shows an application in the field of geotechnical engineering of the BIM based design approach to the case of an underground line. It is a tunnel excavated by means of traditional method, currently under construction. The project defines, in a central BIM model, a detailed tunnel structure model integrated with geological-geotechnical information for the definition of the subsoil 3D model. Once the BIM model of the tunnel stretch under study was completely defined, it was imported into a finite element (FE) model to perform deformation analyses. Thus, BIM-to-FEM-to-BIM interoperability was exploited in order to verify the maturity level of the BIM approach in the field of application for geotechnical infrastructures. Finally, the BIM fourth dimension (4D) was also implemented in the central model for the time management of the tunnel excavation process, synchronized with the numerical model. The BIM based procedure proposed in the present work can be considered as a case study in the technical literature of I-BIM for tunnels, putting in evidence limitations and advantages: i) a high level of BIM maturity was not yet achieved in the infrastructures field; ii) the BIM-to-FEM interoperability seems to be not fully effective and many operations still require the manual intervention; iii) the FEM-to-BIM interoperability brings back all geotechnical choices and hypothesis to the central BIM model, linking the models into a continuously interoperable circuit; iv) an important part of the design of civil infrastructures consists of addressing geotechnical aspects, hence the inclusion of ground conditions and geotechnical data into the BIM model can improve the quality and the usefulness of the model, not only during the design phase but also, and in particular, during the construction and the lifecycle management of the infrastructure, as a support to decision making process especially in urban context
Energy potential of residual biomass from agro-industry in a Mediterranean region of southern Italy (Campania)
No full textAccording to the Italian national Energy strategy elaborated in 2017, the biomass sector has one of the most important strategic roles in energy renewables policy. Thus, estimating the potential of this resource is crucial for its energy valorization. Therefore, in this paper, a method to assess the energy potential from residual biomass is presented. The availability of residual biomass and its energy potential are estimated by using statistical and literature data. To account for the variability of the factors taken into account a comprehensive literature review is carried out focusing on the case studies related to Mediterranean areas. Based on the collected data, uncertainty analysis and sensitivity analysis are performed to provide reliable results. As a case study, the energy potential of residual biomass from agro-industry in the Campania region (southern Italy) is considered. The proposed method allows estimating a total of about 14.5 PJ per year of recoverable primary energy potential in the Campania region, which may cover around 14% of its thermal demand. The analysis carried out is intended to be a useful tool for policymakers of Mediterranean regions, to integrate energy recovery from agro-industrial biomass in the regulatory and investment strategies of the energy sector
Effects of the asynchronism of ground motion on the longitudinal behaviour of a circular tunnel
No full textA sustainable mobility strategy based on electric vehicles and photovoltaic panels for shopping centers
No full textThe transition from conventional centralized energy production to a distributed one may represent one of the solutions to reduce greenhouses emissions. The present work aims at proposing a novel approach for energy and environmental issues, related to the high density of vehicular traffic for shopping centers by introducing photovoltaic panels and electric vehicles into the energy system. In order to achieve such goal a specific case study was developed for the main shopping centers located in the Campania Region, South of Italy. Two well-known simulation platforms, EnergyPLAN and TRNSYS, were purposely integrated. TRNSYS is used to develop a dynamic model of a shopping and the outputs were used as EnergyPLAN inputs to evaluate the role that this sustainable layout can play within the different sectors. Environmental, energy and economic analyses are performed for three different scenarios including the baseline one at 2019, 2030 and 2050. The proposed system can cover about 45.7 % of the shopping centre electric demand. At a regional scale, in the 2050 scenario the yearly reduction of CO2 and energy consumption are 42.0 kt and 160.0 GW h, respectively. The economic results show a SPB (Simple Pay Back) of 2 years and a PI (Profit Index) of 5.4
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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