1,721,167 research outputs found
L’uso del carbone e della cenere nell’edilizia antica
No full textRiassunto
L’intervento prende in considerazione le modalit e le funzionalit dell’utilizzo del carbone nell’edilizia antica. Le fonti antiche fanno frequente riferimento a questo aspetto specifico e le ricerche archeologiche hanno spesso rimesso in evidenza un impiego del legno combusto nelle preparazioni pavimentali o nei livelli basali delle strutture. Non sempre, tuttavia, tale prassi stata considerata con piena cognizione di causa e con consapevolezza delle potenzialit del materiale carbonioso per deumidificare i suoli. La revisione di documentazione di scavi del passato e recenti rivela con sempre maggiore evidenza l’ottima conoscenza empirica dei costruttori antichi in relazione alle propriet dello specifico materiale.
Abstract
The paper examines the operative and functional aspects of the use of charcoal in ancient construction practices. Ancient sources often mention this specific practice, and archaeological research has frequently documented the use of combusted wood in floor preparation layers or in the basal levels of structures. However, this practice has not always been considered with full knowledge and awareness of the potential of carbons and ash to dehumidify soils. The review of documentation from past and recent excavations clearly reveals the excellent empirical knowledge of ancient builders in relation to the properties of this material
A code to evaluate investment projects in energy system with a SAM and a Energy-SAM
Full text linkQuesto rapporto descrive un software, realizzato nel contesto di un accordo tra ENEA ed Openeconomics, che mira ad effettuare valutazioni di impatto macroeconomico di politiche energetiche. Lo strumento di valutazione economica è la Matrice di Contabilità Sociale messa a punto da Openeconomics. L'output dello strumento globale è quindi l'impatto macroeconomico di uno scenario energetico definito a piacimento, con il dettaglio corrispondente ai settori di attività economica considerati (65, nel caso studio). I risultati sono inoltre disaggregabili per gruppi di tecnologie considerati, e corrispondenti misure di politica energetica effettuate dal pubblico decisore. Il software realizzato è adattabile,
mediante modifica dei parametri a una Energy-SAM, ottenuta disaggregando il settore
energetico della SAM in più settori.This report describes a software, created in the context of an agreement between ENEA and Openeconomics, which aims to carry out macroeconomic impact assessments of energy policies. The economic evaluation tool is the Social Accounting Matrix developed by Openeconomics. The output of the global instrument is therefore the macroeconomic impact of an energy scenario defined at will, with the detail corresponding to the sectors of economic activity considered (65, in the case study). The results are also disaggregated by groups of technologies considered, and corresponding energy policy measures carried out by the public decision-maker. The software created is adaptable, by modifying the parameters to an Energy-SAM, obtained by disaggregating the SAM energy sector into several sectors
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
Pervasive developmental disorders and GABAergic system in patients with inverted duplicated chromosome 15
No full textPervasive developmental disorders are characterized by severe, pervasive impairment in several areas of development, with distorted communication skills and stereotypical behavior. Pervasive developmental disorders have a heterogeneous etiology related to brain damage, familial affective psychopathology, chromosomal abnormalities, or dysfunction of neuromodulators. Recently, it has been suggested that the GABRB3 gene, located within chromosome 15q11-13, is a candidate for pervasive developmental disorder. In inverted duplicated chromosome 15 syndrome, in which there is a small marker chromosome derived from inversion and duplication of the chromosome 15q11-q13 region, all patients present with pervasive developmental disorder. To further investigate a possible involvement of the gamma -aminobutyric acid (GABA)ergic system in the inverted duplicated chromosome 15 syndrome, we evaluated plasma levels of GABA and diazepam binding inhibitor in 6 patients with inverted duplicated chromosome 15 and in 8 subjects not affected by neurologic disease. Our findings do not seem to support this hypothesis as no significant differences were found in the GABA and diazepam binding inhibitor plasma levels between patients with inverted duplicated chromosome 15 and controls, but we must consider the possibility that a genetic abnormality of the GABA(A) receptor could be present in patients with inverted duplicated chromosome 15 and still not be reflected in an alteration in either GABA or diazepam binding inhibitor levels in plasma
Short term memory for single surface features and bindings in ageing: a replication study.
No full textIn the present study we replicated a previous experiment investigating visuo-spatial short term memory binding in young and older healthy individuals, in the attempt to verify the pattern of impairment that can be observed in normal elderly for short term memory for single items vs short term memory for bindings. Assessing a larger sample size (25 young and 25 older subjects), using a more appropriate measure of accuracy for a change detection task (A′), and adding the evaluation of speed of performance, we confirmed that old normals show a decline in short term memory for bindings of shape and colour that is of comparable extent, and not major, to the decline in memory for single shapes and single colours. The absence of a specific deficit of short term memory for conjunctions of surface features seems to distinguish cognitive ageing from Alzheimer’s Disease
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