1,720,989 research outputs found
Effects of Radiation Reflective Coatings Applied to Massive Walls
No full textPLEA is an autonomous, non-profit, network of individuals sharing expertise in the arts, sciences, planning and design of the built environment. Founded in 1981, PLEA organises international conferences and workshops; expert group meetings and consultancies; scientific and technical publications; architectural competitions and exhibitions.
Since 1982 PLEA has organised international conferences and events across the globe.
PLEA annual conferences are highly ranked conference attracting academia and practicing architects in equal numbers.
Past conferences have taken place in United States, Europe, South America, Asia, Africa and Australia
Energy retrofit and conservation of a historic building using multi-objective optimization and an analytic hierarchy process
No full textWhen deciding on the best historic building retrofit, energy savings and thermal comfort can be quantitatively evaluated using an energy model, whereas conservation compatibility is intrinsically qualitative and reflects the perspective of the local heritage authority. We present a methodology that permits finding and comparing optimal retrofits for historic buildings in a multi-perspective and quantitative way. We use an analytic hierarchy process to quantify conservation compatibility by distilling a conservation score from the opinions of 10 experts in the field. This score, along with energy needs for heating and cooling and thermal comfort, are the three targets of a multi-objective optimization aimed at identifying optimal retrofits for a medieval building in the north of Italy, destined to become a museum. Retrofit measures considered were different kinds of external and internal envelope insulation, improvement of airtightness, replacement of windows, and ventilative cooling. The result is a portfolio of optimal retrofits that cover the whole range of conservation compatibility. We show that in the analyzed case heritage preservation is compatible with a four-fold reduction in energy needs at a high thermal comfort level. Even higher energy savings are only achievable at the cost of heritage degradation. (C) 2016 Elsevier B.V. All rights reserved
The “Cost Optimality” approach for the internal insulation of historic buildings
Full text linkThe Directive 2010/31 UE (EBPD) introduces the “Nearly Zero Energy Buildings” linked
to cost optimality, where energy benefits are related to economic benefits. The “Cost Optimality”
methodology is applicable both to new and existing buildings, as introduced in
the Regulation 244/2012. This methodology has been largely applied to existing building,
but the literature on historic buildings lacks. However, given the potential of energy retrofit
of this kind of buildings, it would be appropriate to develop a specific methodology
for the economic valorization of the heritage, considering also the conservation and the
historic value of the patrimony. In fact, on the one hand this methodology could be useful
for the “energy valorization” of a historic building in relation to the minimum requirements
of European and national legislations and budgets. However, on the other hand, we
noted the absence of shared information at national level and examples of the “historic
reference buildings”. For this reason, case studies on historic buildings become an important
starting point to create common typological and repeatable models for applying
this methodology. This research aims at evaluating the economic benefits of energy retrofit
of a traditional historic masonry, using the “Cost Optimality” methodology. This
method is structured into the following parts: (i) definition of the type of masonry; (ii)
selection of the insulation systems; (iii) assessment of the energy benefits related to the
insertion of various insulation materials; (iv) evaluation of the Life Cycle Costing; (v)
evaluation of the optimal insulation performance and cost-effectiveness; and (vi) comparison
of energy consumption and Life Cycle Cost to define the most appropriate interventions
for the historic wall
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
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