1,721,001 research outputs found
Buildings Thermal Insulation Performance Analysis
No full textThe paper reports an overview on the physical basis of the building thermal energy balance finalized to highlight the principal energy flows which can be influenced by the envelope insulation characteristics. With the goal of minimizing the energy need, the building thermal load is clearly defined and its minimization is identified as the driving issue to be pursued in order to reduce the required yearly energy demand. An extensive although simplified analysis on the thermal load components is carried out to identify how they react to an envelope insulation change. The results show in some components different and opposite trends with increasing insulation between heating and cooling seasons, which show that is impossible to assume a generalized response for every building in every context and climatic conditions even on national basis. The general conclusion is that a real building energy optimization requires a yearly energy performance parametric study for this specific building in order to tailor, in the specific context and climate, the full set of governing parameters other than insulation
Capillary rising damp in Venetian context : state of the art and numerical simulation
Full text linkThe fragility of Venice and its buildings are linked to the floods, observed since
ancient times and emphasized in recent years: the periodic sea level rise, accompanied by rising
damp, are the main causes of the alteration. In particular, the rising damp causes a series of
complex diseases in the historic buildings, such as physical decay, chemical or biological, with
loss of aesthetic and economic value. In addition, greater heat dispersion and reduced thermal
comfort can also occur in interior spaces, with consequent risks for human health. This is a sign
of “Sick Building Syndrome”. It is very important to develop models for assessing the
vulnerability of assets and to manage sustainable plans related to maintenance processes and
activities, satisfying the requirements of effectiveness and compatibility.Basing on numerical
models performed with the WUFI 2D software, the paper analyses the different behavior of rising
damp in relation to materials or masonry structures. In particular, the construction techniques
and typical materials used in Venetian buildings were investigated, such as clay brick walls, lime
plaster, Marmorino and Cocciopesto, adopted mainly to limit the capillary rise also caused by
the phenomenon of “acqua alta”
La legge quadro sull'inquinamento acustico: i recenti decreti attuativi e le loro implicazioni in ambito impiantistico
No full text
Thermal properties of wood : measurements by transient plane source method in dry and wet conditions
No full textIncreasing use of wooden material in new constructions and retrofit activities push to a deeper comprehension of properties and specifically thermal properties of different wood species. On one side wooden products on the market are accompanied by few and generic information on the other side analysis of literature confirms a lack of experimental data on thermal conductivity of wood species grown in Italy. In this paper some species of softwood like spruce and larch, and hardwood, like elm, oak and ash are analysed and their thermal conductivities as a function of the equilibrium water content are evaluated by the use of a transient plane source. Results are in line with literature values and, in general, conductivity augments with water content increasing. The relationship between water content and conductivity exploited a linear behaviour for all species
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
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