1,721,056 research outputs found
Efficienza energetica degli edifici scolastici pugliesi: un’indagine basata sulla rilevazione dei consumi reali
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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
District Geometry Simulation: A Study for the Optimization of Solar Façades in Urban Canopy Layers
Full text linkThis paper shows the results of a research aimed at assessing the amount of energy that can be produced by solar envelopes (facades and roofs) in urban contexts.A preliminary set of simulations was carried out, through dynamic yearly analyses on a sample building, to identify the main parameters influencing the availability of solar radiation and to optimize the building's shape. The general target is to maximise solar radiation available on the external building envelope, in order to exploit it through building integrated solar systems.Furthermore, the effect of reflected solar radiation has been analysed by simulating different finishing materials (green façades, glazed façades, concrete façades and aluminium façades) on the neighbouring buildings
Urban solar district: a case study of geometric optimization of solar façades for a residential building in Milan
No full textThis paper shows the results of a research on parametric geometric transformation of the building volume and transformations of façade surfaces to optimize solar access of buildings in an existing urban district. Photovoltaic systems are generally installed on roof tops of buildings located in low density areas due to the availability of horizontal surfaces, but the developments of cities with tall buildings and the lack of available horizontal surfaces have encouraged photovoltaic integration on façades.
The new policies of regulations to contain the horizontal city’s development and to increase the use of renewable resources suggest a conscious and responsible design process.
Within this scenario the main aim of this study is to find the way to improve solar energy capture in the urban existing context. The study wants to localize the best areas on the façade surfaces to install the solar systems and optimize the solar energy production in order to cover a part of energy demands. The optimization process starts from a simple three-dimensional volumetric modelling, with fixed parameters (height, floor area and volume of the building). Then façade surfaces are manipulated in an iterative parametric design process to evaluate the solar radiation of different geometric transformations using a generative digital modelling software (Rhynoceros + Grasshopper) and solar dynamic simulation tool (Radiance/Daysim).
The proposed method is restricted to the relationship between solar access and solar applications, but the further development of the research aims investigate the mutual effects among neighbouring buildings in term of solar reflections and increase of superficial temperatures.
The global process has been validated through a case study, analysing a typical development in Milan, involving the demolition of an existing building and the reconstruction of the same volume, with a solar optimized shape
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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