1,720,978 research outputs found
Numerical investigation of the influence of heat emitters on the local thermal comfort in a room
No full textIn this paper a numerical analysis of the effect of heat emitter characteristics on the local indoor
thermal comfort condition in a room is presented. A dynamic model, able to evaluate the 3D
distribution of the mean radiant temperature in the whole volume of a thermal zone is developed.
The model allows a fast evaluation, in terms of computational time, of the view factors associated
to the inner points of a room thanks to the use of the MATLAB Contour Double Integral Formula
(CDIF) routine. The new tool has been used in order to obtain, by means of a series of dynamic yearly
simulations, a comparison among different heat emitters (i.e. in-slab radiant floor, in-slab radiant
ceiling, lightweight radiant ceiling, radiator, radiant vertical wall and all-air systems) in terms of 3D
distribution of the local operative temperature in a room. The knowledge of the 3D distribution of
the operative temperature enables the local analysis of the indoor thermal comfort conditions
established in the room during the year. The local Predicted Mean Vote (PMV) distribution within
the room is calculated for each considered configuration. The results allow to quantify how the
reduction of the maximum surface temperature of the emitters, which can be experienced when
the envelope thermal insulation is increased, can create more uniform indoor thermal conditions
by reducing the differences existing among the heat emitters
The benchmark of a new SIMULINK library for the thermal dynamic simulation of buildings.
No full textNowadays, for NZEB buildings the complexity of the interactions between thermal plants and buildings is increasing. The reduction of the primary energy consumptions in NZEB is generally pursued by maximizing the use of renewable energy which gives a discontinuous contribution during the season; it becomes important to study in detail the dynamic interactions between the building and the adopted HVAC systems, by taking into account unsteady state behaviour of walls, roofs, windows and so on. This kind of analysis can be obtained by using conventional dynamic simulation software (i.e. TRNSYS, ESP-r, Energy Plus, DesignBuilder). It has been demonstrated that a detailed analysis of controlled HVAC systems can be also obtained by using SIMULINK and in the past open block libraries made in SIMULINK have been proposed for HVAC system analysis, like in the case of the CARNOT blockset. However, a weak point of CARNOT is still considered the building modelling due to its limited flexibility and completeness. For this reason, a new specific library named ALMABuild based on SIMULINK blocks for the dynamic modelling of a building is presented in this paper with the aim to integrate and improve the blocks already available in CARNOT.
In ALMABuild the modelling of a building with SIMULINK is driven by means of a series of Graphical User Interfaces (GUI). In this paper a benchmark of ALMABuild is shown by using TRNSYS as reference. The comparison evidenced a good agreement between the two methods. However, differences are present each time that the procedure indicated by the European Standard EN ISO 13790:2008 (and integrally followed by ALMABuild) is not in agreement with the procedure followed by TRNSYS (based on American standards)
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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