1,721,006 research outputs found
UNI standards for acoustics in buildings
No full textSome Italian standards relating to building acoustics are summed up, namely those dealing with expression of physical and suggestive values of sound and noise, normal measurement frequencies, relations between sound pressure levels of narrow noise bands, measurement of acoustic insulation in buildings, measurement of noise insulating capacity of structural component, measurement of acoustic insulation by air, measurement of acoustic insulation of linings, evaluation of acoustic performance of buildings and building components, measurement of insulation to impact noise
Caratterizzazione numerica di tubi capillari percorsi da fluidi HFC
No full textLo scopo di questo lavoro è quello di definire una procedura numerica che permetta di prevedere il valore di portata di refrigerante che attraversa un capillare di geometria e lunghezza nota e che risulti impiegabile all’interno di codici di calcolo per la simulazione del comportamento in regime dinamico di macchine frigorifere e/o pompe di calore. A tale scopo è stato messo a punto un modello matematico per la simulazione del funzionamento dei tubi capillari al fine di prevedere il comportamento del capillare in tutte quelle situazioni operative in cui le condizioni di funzionamento della macchina si differenziano notevolmente dalle condizioni “di regime”, come accade durante le fasi di accensione e spegnimento della macchina o durante l’inversione del ciclo nelle pompe di calore reversibili
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
CERTIFICAZIONE ENERGETICA ED ACUSTICA: QUADRO NORMATIVO E STATO DI APPLICAZIONE
No full textIl termine “certificazione”, può assumere diverse connotazioni a seconda dello specifico settore di interesse, energetico o acustico, ma nella sua accezione più ampia prevede una serie di procedure tecniche e amministrative definite da apposite normative tecniche, atte a garantire specifiche prestazioni dell’edificio o di suoi componenti, e che si conclude con un documento (il certificato) che ne attesta il risultato finale. Sebbene l’attuale normativa nazionale preveda in realtà solo l’obbligo della certificazione energetica degli edifici, anche nel settore dell’acustica edilizia troviamo delle procedure che prevedono di garantire le prestazioni finali coinvolgendo non solo la fase di progettazione, ma anche quella di realizzazione con controllo finale del risultato sulla base sia di documentazione relativa al progetto sia delle proprietà dei materiali utilizzati, anche tramite la verifica della corretta posa in opera dei materiali ed eventuali collaudi final
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
Management of Joint Research Activities within ERA-ARD: Guidelines for ARD programme planning, monitoring, evaluation and impact assessment
No full textThe present document has been elaborated in the context of the ERA-ARD project “The Agricultural Research for Development (ARD) dimension of the European Research Area (ERA) “. It is based on work done within Task 3.2 to identify a set of common or compatible methodologies for ARD planning, monitoring and evaluation and impact assessment. This set should serve as a guide for the management of joint ARD activities that are presently developed within the framework of the ERA-ARD project
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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