1,720,963 research outputs found
Building acoustics throughout Europe. Volume 2: Housing and construction types country by country
No full textThis book covering key aspects of building acoustic construction for dwellings found in 31 countries is the second volume of “Towards a common framework in European building acoustics”. It represents some of the main discussions and gathering of data undertaken by Working Group 3 (WG3) of COST Action TU0901 and also participating country members from WG1 and WG2
Futuro marco normativo en Europa en acústica de la edificación
No full textLa Unión Europea nace para propiciar la integración y gobernanza en común de los estados y los pueblos de Europa. Además de crear un marco legislativo que asegure la libre circulación de ciudadanos, bienes, y servicios, se ha creado una política común en muchos otros aspectos tales como el mercado, la agricultura, la pesca... El ruido ambiental ha sido también abordado por la normativa europea y es deseable que en algún momento se aborde el problema del ruido en las viviendas.
Es precisamente el problema del ruido en las viviendas lo que ha motivado que tanto desde la red COST TU0901 (http://www.costtu0901.eu/) como desde el Comité ISO TC43/SC2 (acústica en la edificación) se esté investigando acerca de procedimientos alternativos de medida y evaluación del aislamiento acústico in situ así como de estimación de la correspondiente incertidumbre (modificaciones a las actuales normas UNE EN ISO 140-4, 5 y 7; UNE EN ISO 717 y EN 20140-2 respectivamente). Se está trabajando así mismo sobre la posible creación de un sistema de clasificación acústica de viviendas que pudiera ser adoptada por todos los estados miembro. Todos los cambios normativos recientemente aprobados o en vías de desarrollo tendrán consecuencias sin duda positivas para el usuario de las viviendas, pero requerirán de un esfuerzo adicional por parte de todos los agentes implicados en el sector de la construcción, desde la fase de proyecto hasta la de ejecución
Evolución del marco normativo internacional en acústica de la edificación
No full textPor fin en pleno siglo XXI la sociedad es consciente de la necesidad de incluir los conceptos de sostenibilidad y eficiencia energética en el sector de la edificación. Gracias a que existe un amplio consenso internacional, la mayor parte de los países desarrollados han establecido fechas límite a partir de las cuales todos los edificios nuevos deberán tener un consumo de energía casi nulo y para ello están desarrollando políticas y medidas financieras orientadas a cumplir los objetivos previstos. Así mismo, existe una gran preocupación a nivel internacional sobre el problema de la contaminación acústica desde el punto de vista medioambiental y también se han desarrollado políticas y medidas financieras destinadas conocer, valorar y mitigar el problema del ruido ambiental.
En Europa las Directivas 2010/31/UE relativa a la eficiencia energética de los edificios y 2002/49/CE sobre evaluación y gestión del ruido ambiental desarrollan la política comunitaria en ambos aspectos.
Sin embargo, el ruido en nuestras viviendas parece ser un tema “olvidado”. Si se observa el panorama internacional, existen muchos países en los que actualmente no existe legislación al respecto, y la que existe difiere sensiblemente de unos países a otros. Es precisamente el problema del ruido en las viviendas lo que ha motivado que tanto desde la red COST TU0901 (http://www.costtu0901.eu/) como desde el Comité ISO TC43/SC2 (acústica en la edificación) se esté investigando acerca de procedimientos alternativos de medida y evaluación del aislamiento acústico así como sobre la posible creación de un sistema de clasificación acústica de viviendas que pudiera ser adoptada a nivel internacional.
Se trata pues de motivar el debate sobre la conveniencia de desarrollar políticas comunes en materia de Acústica de Edificios que pudieran ser integradas con las directrices relativas a la eficiencia energética de edificios y que a la postre redundaran en un beneficio a la sociedad y al ciudadano tanto en lo que a consumo energético respecta como en lo relativo a salud, confort y bienestar en el hogar
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
How building technology in Italy and Spain can be improved after the experience of COST Action TU0901 and the discussion on going on the new descriptors
No full textCOST Action TU0901 ended at the beginning of 2014 with the involvement of many European Countries. The materials collected during the project and the content of the e-book [1] open up very interesting discussions on the potential effects on each single country.
Partitions typically used in southern European countries are quite different from those built in northern countries because of their greater surface mass. This can have an important influence on their acoustic performance when evaluated also at lower frequencies, where light partitions usually show a drop in insulation.
The aim of the paper is also to discuss the effect of the introduction of new descriptors described by ISO CD 16717-1 on building acoustics. Considering that during the last meeting of the ISO TC 43/SC2 held in Berlin, the agreement to stop the development of ISO 16717, parts 1 and 2, was taken, might give the impression that the topic is no longer relevant. However, as also stated by ISO TC 43/SC2, there is a need for more research in the area of low frequency sound insulation and therefore any experience with new descriptors which take into account the evaluation of acoustic performance of partitions from 50 Hz is relevant. Therefore, the paper focuses on the application of classical and new descriptors measured on a number of partitions in real buildings in Italy and Spain and on the possible changes in the technology to improve the results. Moreover, the article points out possible consequences of the application of a new classification scheme for dwellings proposed by COST Action TU0901 and by Technical Committee 43 - SC 2 of ISO to typical building technologies in Italy and Spain
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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