1,721,097 research outputs found
Thermal comfort in open plan offices in northern Italy: an adaptive approach
No full textThe analysis of the thermal comfort in nine open plan offices was carried out in the present work. An
objective evaluation, by means of environmental parameters experimentally-acquired in the selected
work-places, was performed. In addition, a subjective evaluation was achieved by the distribution of
a dedicated multiple response questionnaire, already developed in previous studies. The questionnaire is
comprehensive of information for the application of the traditional static model and also the adaptive
model, proposed by UNI EN ISO7730:2006 and ASHRAE 55.
Predicted Mean Vote (PMV) values derived from questionnaire data were compared with those of the
Operative Temperature. A significant correlation was found. Furthermore, the Neutral Temperature,
corresponding to thermal comfort, was calculated and correlated to the Operative Temperature and to
the External Temperature by means of linear regression method. In addition, a comparison between data
obtained by the 588 questionnaires and data from experimental campaigns, for each work place in both
morning and afternoon, is here presented. As a conclusion, parameters useful for the application of
adaptive models have been elaborated according to the statistical approach suggested by recent
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
La sala delle compere di palazzo s. Giorgio di Genova: analisi sperimentali e progetto di bonifica acustica
No full textHVAC systems testing and check: a simplified model to predict thermal comfort conditions in moderate environments
No full textAn interesting tool for testing and check phases of HVAC systems was developed, in order to evaluate
thermal comfort parameters only measuring temperature and relative humidity in moderate environments,
for a wide range of clothing thermal insulation. A simplified approach to thermal comfort was
developed in the seventies by Rohles, who found a correlation between PMV, air temperature and relative
humidity, for sedentary activity and clothing thermal insulation equal to 0.6 clo. An improvement of
Rohles model is proposed, aiming to extend results in a wider range of clothing thermal insulation
(0.25–1.65 clo). Data from experimental campaigns in moderate environments were used to implement
a function PMV = PMV(T, RH) and diagrams PMV vs. temperature, for different values of relative humidity,
were traced (nine equations and diagrams for male, female, and both sexes, and for three ranges of
Icl). Standard deviation between measured and calculated data was evaluated and a mean error on
PMV of ±0.22 was found; a T-Student test was also performed and results were significant. Mean Radiant
Temperature data were used to calculate Operative Temperature and to correlate to PMV and to Neutral
Temperature, corresponding to thermal comfort, by means of linear regression method
Determinazione sperimentale di porosità e resistenza al flusso di materiali acustici granulari
No full textVariations 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
Recupero di una cavità naturale: indagine preliminare su aspetti microclimatici e illuminotecnici, proposta di soluzioni ecocompatibili
No full textLo studio del comfort termoigrometrico e illuminotecnico in ambienti moderati di tipo convenzionale è da tempo oggetto di studio e numerosi sono i lavori presenti in Letteratura. Oggetto del presente lavoro è la fase preliminare di studio per rendere abitabile una cavità naturale situata nel comune di Sacrofano, in provincia di Roma. Il progetto nasce da un’idea del proprietario della grotta che ha coinvolto diverse figure tra cui l’Università di Perugia, l’amministrazione locale ed alcune aziende che operano nel settore di impianti eco-compatibili ed energie rinnovabili.
E’ stata condotta una campagna di rilievi con lo scopo di valutare le attuali condizioni dell’ambiente, indagando i principali parametri microclimatici, di qualità dell’aria ed illuminotecnici. In fase di post-processing, si sono calcolati gli indici PMV e PPD e confrontati i valori con gli standard previsti sia dalla UNI EN ISO 7730 che dalla ISO-DIS 7730. Per il comfort visivo, i valori di Illuminamento e Luminanza misurati sono stati messi in relazione con quelli prescritti dalla norma UNI EN12464.
E’ stata condotta parallelamente una ricerca finalizzata ad individuare i prodotti offerti dal mercato per climatizzare ed illuminare la grotta in maniera eco-compatibile: particolare interesse è stato rivolto all’impiego dell’energia solare e delle biomasse. Sono stati ipotizzati, inoltre, alcuni interventi strutturali ed architettonici per adeguare la cavità agli standard abitativi minimi e creare i presupposti per l’alloggiamento di impianti tecnologici ad impatto ambientale ridotto
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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