1,720,977 research outputs found
Recommendation of RILEM TC 243-SGM: functional requirements for surface repair mortars for historic buildings
Full text linkSurface repair mortars are used for the compensation, or repair, of lost portions of surface materials in historic masonry buildings. It is recommended that their design and application should be performed in a wider context of conservation values related decision making, to prioritise preservation of original fabric, authenticity of approach and maintenance of integrity, and not just on technical principles alone. However, a technical context for their design does exist, that requires understanding of the properties of the substrate that they will be applied onto, and adherence to minimum aesthetic (colour and texture) requirements. The principles of physical, mechanical and chemical compatibility of repair apply and the attributes of the repair mortar should be carefully matched to the substrate alongside a sacrificial behaviour (not more durable than the material being replaced). Guidance is given on the design, application and the functional requirements that must be met when using surface repair mortars
Towards a more effective and reliable salt crystallization test for porous building materials: state of the art
Full text linkThe durability of building materials with respect to salt crystallization is commonly determined by accelerated weathering tests, carried out in the laboratory. An effective laboratory weathering test should assess the durability and, in the case of conservation of historic buildings, the compatibility of repair materials with those existing. Besides, the test should provide reliable results within a reasonable period of time, accelerating the deterioration process without however altering its mechanism. Despite several national and international standards, recommendations and guidelines, a commonly accepted testing protocol does not yet exist. Researchers often develop and apply their own procedure, a fact that complicates comparison between different studies. The RILEM Technical Committee 271 ASC has been set up with the scope of developing improved test procedures for the assessment of the behaviour of materials under the influence of salt crystallization, which should overcome the limitations of existing standards and recommendations. This paper constitutes one of the first results of the work of the Technical Committee. It critically reviews the literature on salt crystallization tests, identifies advantages and limitations of the several test protocols and provides new ideas for the development of improved salt crystallization procedures. © 2018, The Author(s)
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
Restauratie en revalorisatie van de ’s Hertogenmolens te Aarschot, 2006-2010
No full textDe watermolen werd gebouwd in 1505-1507 door Guillaume de Croy, heer van Aarschot. Naast molen, was het gebouw ook één van de belangrijkste versterkte punten van de verdediging van de stad: met de sluizen kon het Kempens deel (noordelijk deel) van het (niet omwalde) stadsdeel onder water worden gezet. Deze banmolens (molens waar de naburige boeren hun graan verplicht moesten laten malen), eigendom van de hertog van Aarschot, werden in1795 onteigend en tot nationaal eigendom van de Franse staat gemaakt. In 1795 werden de Oostenrijkse Nederlanden immers officieel ingelijfd bij Frankrijk. In 1812 verkoopt de overheid de molens aan de familie Ectors. In 1910 werd de molen in openbare verkoop aangekocht door de Belgische Staat. Nog in de jaren 1960 werd de molen gebruikt als pletmolen voor glas. Het poeder werd o.a. gebruikt bij de fabricage van schuurpapier. Eenmaal verlaten, trad het verval vlug in. Na een brand in 1970, werd een zijvleugel gesloopt. In 1986 volgde de bescherming als monument. In het kader van een Belgische staatshervorming werd de molen overgedragen aan het Vlaams Gewest. In 2004 ging nogmaals een eigendomsoverdracht door naar de stad Aarschot. Al sinds de jaren 1980 werden restauratieplannen opgemaakt. De uitvoering ervan werd dringend, aangezien één van de westgevels instortte in 1986. Pas na de overdracht aan het Vlaams Gewest en na de opname van de 's Hertogenmolens in een stadsvernieuwingsproject kwam het dossier in een stroomversnelling. De onderbouw, waar het water van de Demer doorstroomt, werd gerestaureerd door de dienst Waterwegen en Zeekanaal nv. De bovenbouw werd via een privaat-publieke samenwerking (pps) gerevaloriseerd als hotel. In het weekend van 12 en 13 juni 2010 werden de gerenoveerde 's Hertogenmolens officieel geopend. In 2011 werden de 's Hertogenmolens bekroond met de Provinciale Architectuurprijs Vlaams-Brabant en met de Europa Nostra Award.status: Publishe
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
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