147 research outputs found
Integrating environmental sustainability indicators in BIM-based product datasheets
No full textThis paper presents the findings of a research study conducted with the aim of assessing the effectiveness and completeness of the environmental sustainability indicators at national and international level. The need is to clarify the various constantly evolving regulations for sustainability in the construction sector and to have a unique list of indicators mixing the several existing approaches. Starting from the main regulations on sustainability of construction works, the research outlines the required environmental indicators. Since the construction sector is considered one of the most impacting from an environmental point of view, a great attention is given to the creation of a user friendly tool to collect and store different sustainability indicators to support design choices and to increase the awareness of construction and manufacturing companies and end users. Nowadays manufacturers use EPD (Environmental product declaration), which is regulated by the European Standard EN 15804: 2014 and at the same time by the International ISO 21930: 2017, as an environmental certification and communication tool by which they can declare the environmental performance of their products through the use of specific indicators. After analysing the actual European and International regulations about the sustainability of construction works, the draft of the European standard has been examined in order to compare the used indicators and create an integrated and complete version of product data template in order to collect all of these parameters. Furthermore, the Ministerial Decree of April 10, 2013 has introduced the so called CAM (Italian acronyms for Minimum Environmental Criteria) - made mandatory by Legislative Decree 20/2016 Procurement Code, amended by Legislative Decree 56/2017 - in order to give the general criteria and technical indications required by tin Italy to help the public administration to identify and choose among several works and products those with a lower environmental impact. The paper shows an integrated BIM-based template to be adopted for product datasheets that can be exploited by manufactures, designers, facility managers and consumers in order to ease the information exchange about environmental impacts
Some remarks on the coincidence set for the Signorini problem
No full textWe study some properties of the coincidence set for the boundary Signorini problem, improving some results from previous works by the second author and collaborators. Among other new results, we show here that the convexity assumption on the domain made previously in the literature on the location of the coincidence set can be avoided under suitable alternative conditions on the data
On the homogenization of a Signorini-type problem in a domain with inclusions
No full textIn this paper we investigate the effect of a Signorini-type interface condition on the asymptotic behaviour, as tends to zero, of problems posed in -periodic domains with inclusions. The Signorini-type condition is expressed in terms of two complementary equalities involving the jump of the solution on the interface and its conormal derivative via a parameter . Our problem models the heat exchange in a medium hosting an -periodic array of thermal conductors in presence of impurities distributed on some regions of the interface. Different limit problems are obtained according to different values of
Are on-chip heralded single photon sources possible by intermodal four wave mixing in silicon waveguides?
No full textOn-chip heralded single photon sources are of key importance in the development of chip-scale devices exploiting the quantum properties of light. Single photon states can be produced as single photons heralded from correlated photon pairs generated through spontaneous four wave mixing. On-chip heralded single photon sources based on spontaneous four wave mixing have been already demonstrated. However, the heralded and herald photons are usually generated with wavelengths very close to the pump one, limiting the pump rejection efficiency and the application to the mid infrared. Moreover, the common sources of heralded photons based on spontaneous four wave mixing require spectral post filtering to achieve high purity, limiting the brightness and the integration of these sources. A solution to these problems can be provided by intermodal four wave mixing. In this work, we demonstrate the generation of photon pairs through intermodal four wave mixing in silicon waveguides, measuring the coincidences between the idler at 1.281 μm and the signal at 1.952 μm. We then discuss the application of intermodal four wave mixing to on-chip heralded single photon sources
Sul S. Pantaleo 8 della Biblioteca Nazionale Centrale di Roma: una miscellanea dantesca di metà Trecento
No full textThe article discusses the MS S. Pantaleo 8, a remarkable collection of Dante’s works now
kept at the Biblioteca Nazionale Centrale in Rome. By investigating how the manuscript
was prepared, and on the basis of the eight different writings of the scribes who copied
the texts, as well as of the work of the three illuminators involved in the decoration of the
book, the author suggests that the manuscript might have been copied around the mid-14th
century either in eastern Tuscany or in Umbria
Tra flessibilità e regole: un primo bilancio della legislatura
No full textIl saggio discute l'evoluzione dell'economia italiana e in particolare della finanza pubblica nel corso della legislatura 2013-2017 (effetti delle principali interventi in termini di imposte e spese). Si dà particolare enfasi ai vincoli fiscali definiti a livello europeo e la "fiscal stance" viene valutata anche in termini comparati con gli altri paesi dell'eurozona
Global Examination of Mental State: An open tool for the brief evaluation of cognition
No full textBackground The aim of this paper is to present a freely accessible new instrument for the evaluation of cognition: the Global Examination of Mental State (GEMS). Methods It is made up of 11 items tapping into a range of skills, such as Orientation in time and space, Memory, Working memory, Visuo-spatial, Visuo-constructional and Planning abilities, Perceptual and visual Attention, Language (Naming, Comprehension, and Verbal fluency), and Pragmatics. Results The psychometric strengths of this screening are: (1) extensive and updated normative data on the adult Italian population (from 18 to 100 years old); (2) absence of ceiling effect in healthy individuals, which allows to better detect interindividual variability; (3) comparison of the global scores with normative data taking into account Cognitive Reserve rather than only education, thus increasing diagnostic accuracy; (4) thresholds for significant change over time and the possibility to use parallel versions (GEMS-A/GEMS-B) for test-retest; (5) solid psychometric properties and data on discriminant validity; and (6) free access to all materials (record forms, instructions, and cut-off scores) on the web under a Creative Common License. Conclusions With all these characteristics, GEMS could be a very useful paper-and-pencil instrument for cognitive screening
Ciguatera poisoning in early pregnancy and severe visual impairment in the child: A case report
No full textMR brain investigation in thirty-five children with Leber's congenital amaurosis
No full textThere are few literature reports of MR study in children with Leber's
congenital amaurosis, a severe early onset autosomal recessive retinal
dystrophy. We describe the clinical and neuroradiological findings in 35
patients. Of these, 22 had a normal brain MR scan, four showed mild
dilatation of the cortical sulci, two had mild optic-chiasmatic
thinning, three showed aspecific white matter changes not involving the
primary visual pathway and four had ``molar tooth'' mesencephalic
malformation. Our series confirms literature findings of normal signal
and morphology of the primary optic pathway. Posterior cranial fossa
abnormalities, defined as rhombencephaloschisis, was associated with a
clinical picture different from that of the other patients. This
abnormality is encountered in different malformations associating
cerebellar, ocular and renal abnormalities. MR brain study in children
with Leber's congenital amaurosis is recommended not only to assess the
visual pathways, but also to analyse the posterior cranial fossa and
cerebellum
Towards MIR heralded photons via intermodal four wave mixing in silicon waveguides
No full textWe generate correlated photons with 600 nm spectral distance via intermodal four wave mixing in silicon. We want to demonstrate on-silicon-chip heralded single photons, beyond 2 μm, without post spectral filtering
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