1,721,258 research outputs found
Università di Bologna. Reconnaissabilité des parties urbaines dans la ville moyenne / Recognizability of the urban parts in the medium-sized city
No full textThe book collects the results of the international architectural design workshop coordinated by the Department of Architecture as part of the Erasmus+ Strategic Partnership for higher education Archéa program
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
L'inizio del culto di papa Clemente I presso gli Slavi ortodossi
No full textNell'articolo vengono riportate le più antiche testimonianze slave del culto di papa Clemente I e viene fatta analisi del "Sermone panegirico di s. Clemente papa" scritto da Clemente di Ocrida (IX-X sec.
Numerical investigation of the fire resistance of protected cross-laminated timber floor panels
No full textSeveral experimental investigations have been performed on timber elements to determine their fire resistance. However, the numerical modelling is nowadays an effective and inexpensive alternative method to investigate the behaviour of timber structures in fire conditions. Once validated on experimental data, finite element models can be used to understand more in detail the experimental behaviour, and then employed to carry out parametric studies where geometrical, mechanical and thermal properties are varied.
After an extensive discussion on the state-of-the-art in numerical modelling of timber members and connections in fire conditions, the paper presents a two-dimensional model implemented in ABAQUS software package to simulate fire tests of cross-laminated timber (XLAM) floor panels protected with different cladding systems. The temperature distribution within the XLAM cross-section and the fire resistance of panels loaded out-of-plane were predicted through thermal and thermo-mechanical analyses, respectively. Since the stiffness and strength degradation of wood with temperature is still subject of research, a parametric study with different degradation laws was carried out. Numerical predictions were compared with experimental results showing acceptable accuracy, particularly when the degradation laws of the EN 1995-1-2 were used. The comparisons also show the need to model correctly the failure of the protective cladding for an accurate prediction of the thermal behaviour
Instrumentos para siega de plantas en el calcolítico de Chibanes
No full textMicro-wear analysis has been applied to one of the characteristic flint tools types (foicinhas) of the III millennium cal BC in Portuguese Estremadura. Foicinhas have a specific technological and typological character and their function has been discussed long time ago without any positive results. The present use-wear study makes clear that they are sickles. This provides information about the agricultural practices of the Portuguese Chalcolithic and gives new insights as to the biography of the foicinhas. This paper highlights the contribution of micro-wear analysis for an integrated socioeconomic approach to chipped stone tools.El análisis funcional ha reconocido rastros de uso en artefactos de sílex (foicinhas) que caracterizan la identidad socio-cultural del III milenio cal BC en la Estremadura portuguesa. Esos artefactos tienen rasgos tecnológicos y tipológicos específicos y su funcionalidad ha sido discutida durante mucho tiempo sin resultados positivos. El presente estudio funcional permitió su clasificación como elementos de hoz, proporcionando información sobre las prácticas agrícolas durante el Calcolítico en Portugal y nuevos enfoques sobre la biografía de las foicinhas.
Este trabajo supone un ejemplo más de la aportación del análisis funcional al conocimiento de los aspectos socio-económicos en las sociedades del pasado
The model of the circular economy as a strategy for the sustainability of the tanning industry
No full textThe transformation of putrescible animal integuments into a stable and versatile material such as leather, is perhaps the first, thousand-year old example of giving value of a waste in valuable commodity, in compliance with the principles of what we now call the Circular Economy (CE).
The increasing production requirements, and the demand for products that are increasingly more responsive to the needs of an evolving society, have led to a progressive increase in the complexity of the leather technology. This has induced, inevitably, to a dramatic increase in the environmental impact and, therefore, to the loss of the early sustainable nature of the tanning industry. In order to highlight the negative environmental externalities, it is necessary to analyze all the stages of the tanning sector, starting from the origin of the raw material, to the design, production, consumption, to the end-of-life destination.
Indeed, the linear economic model 'take-make-dispose' less and less adapts itself to the reality in which we operating. The current challenge on the sustainability of the tanning productive sector therefore requires a set of actions, including the use of efficient certification systems that induce chemical suppliers, tanneries and waste treatment companies to achieve a production flow increasingly transparent. Already today there are several leader companies that have embarked on a path aimed at the construction of a new market system that puts sustainability at the core as added value, with the ambitious objective of achieve the “Zero Discharge of Hazardous Chemicals”. The CE model can provide a winning strategy if appropriately implemented also to a technologically complex production chain which is currently the tanning sector and provide the operative tools to aim in a new and consistent way to reduce the consumption of raw materials, water and energy, according to the “four R” model: Reduction, Reuse, Recycling and Recovery
"Finite element modelling of cross-laminated timber floors exposed to fire"
No full textThe paper presents a finite element model implemented in Abaqus software package to
investigate the thermal and structural performance of protected and unprotected cross-laminated timber (Xlam) floor panels loaded out-of-plane and exposed to standard fire. The temperature-dependent relationships for wood properties proposed by the European code for fire design of timber structures were adopted in the modelling. The ‘concrete damaged plasticity’ model readily available in Abaqus was used to describe the non-linear mechanical behaviour of timber. The falling-off of the protective layer was simulated numerically as observed in the experiments. The numerical results in terms of temperature and stress distributions along the depth of a Xlam panel
highlight the effect of the protective layer on heat transfer and consequently on stresses. By comparison with experimental results, an accurate prediction of the fire resistance of Xlam floor
panels was attained
- …
