1,720,991 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
Daylighting performance parameters of glazings for buildings obtained by spectral measuraments at variable angle of incidence
No full textThe natural lighting intensity penetrating into interiors depends on a number of parameters, the light transmittance of the glazing being one of them. This parameter can be obtained by variable angle spectrophotometry. In the case of sunlight the results obtained on a series of commerciai glass sheets were combined with astronomical data for a given latitude and orientation of the
façade and matrices were obtained which supply light transmittance as a function of time of the day and month of the year.
Concerning skylight two particular cases were considered: the uniform luminance sky and the CIE overcast sky. More complex sky models variable in time and the presence of external or internal obstructions do not allow the behaviour of the glazing to be characterized by a single parameter.
The daylighting in interiors can be evaluated thanks to suitable computer programs starting from the light transmittance of the glazing as a function of the angle of incidence if the intensity and the spectral distribution of the solar radiation are known. A computer code can be used for determining on an hourly base thwe natural illuminance distribution in a room with an aperture on the wall closed by the double glazings considered in this paper
Computation of solar gains admitted by a fenestration
No full textThe intensity of the solar radiation penetrating into interiors depends on a number of parameters, the solar factor of the glazings being one of them. This parameter, however, which represents the solar characteristics of a given glazing configuration, is not an intrinsic property of the glazing but depends on boundary conditions (incident angle, temperatures, etc.). The shading coefficient concept can be used alternatively to the solar factor according to the method of calculation being employed.
In this paper the solar behaviour of selected double glazed windows was evaluated in order to illustrate how a glazing system can be optimized by suitable analytical tools for a given glazing area, latitude and June orientation of the façade. Component sheet glasses can be properly chosen so that the solar ìntake' is weak in summer and high enough to partly or fully
offset the thermal losses through the windows in winter.
Three kinds of analytical approaches were used for this computation
Spectrophotometric characterisation of homogeneous and inhomogeneous thin films for architectural glazing applications
No full textThin solid films deposited on glazings for buildings reduce the intensity and modify the spectral curve of solar radiation in order to obtain better comfort in the indoor environmento The daylight and energy behaviour of a fenestration with a coated glass sheet can be characterised even in nonmeasurable conditions provided that the coating structure (number of layers and thicknesses) and the material optical parameters (refractive index and absorption coefficient) are known. Suitable computer programs then allow
natural illuminance and solar irradiance in the room to be
predicted. The required optical parameters of the film can be determined by spectrophotometric measurements and data processing. This characterisation is not straightforward when the film deposited on the glass substrate shows a refractive index variation through its thickness. In this paper an approach for inhomogeneous thin films is presented together with some examples of the application of the coated glasses in architectural glazings
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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