1,721,040 research outputs found
Il comprensorio archeologico di Santa Croce in Gerusalemme a Roma. Nuovi interventi di riqualificazione e recenti scoperte (2013-2014)
Full text linkNel maggio 2014, durante le operazioni di scavo di una trincea per il ripristino di un collettore fognario, lungo via Germano Sommeiller, è stata rinvenuta parte di una struttura muraria antica con orientamento NE-SO. Il tratto di muratura esposto, che presenta una larghezza massima di m 1,12 ed è stato messo in luce per una lunghezza di m 1,63, è costituito da un nucleo di conglomerato cementizio che non presenta, nella facciavista sudorientale, alcuna cortina, mentre a N/O è stato tagliato per la costruzione di una fogna moderna. La superficie S/E del muro è coperta da uno strato d’intonaco grossolano di preparazione, con inclusi di dimensioni medie, che ha uno spessore massimo di cm 2. L’intonaco presenta una lacuna di forma semicircolare nella parte inferiore del muro. In prossimità della sezione di scavo, si conservavano esigui lacerti dell’arriccio (cm 1-1,5), recante tracce di colore nero, steso uniformemente.The subject is about the latest discoveries in the archaeological area of Santa Croce in Gerusalemme emerged during works for the protection and enhancement of the cultural Heritage. On the occasion of the apse restoration of the civil basilica there were new data on the floor and marble decoration of the aula palatina, while another environment belonging to the right tower of the carceres of the Circus Varianus emerged near the entrance of the archaelogical district. Finally a wall relevant to ThermaeHelenianae was found in via G. Sommeiller, that conforms to position with the plan by Palladi
An effective free-meshing and linear Step-Wise procedure to predict crack initiation and propagation
No full textAn automated procedure is proposed to calculate fracture initiation and propagation in two-dimensional structures. The application uses and enriches the Hybrid Semi-Analytical Method to calculate mixed-mode stress intensity factors in linear elastic fracture mechanics framework. The strategy does not necessitate prior knowledge of the starting crack tip location within the structure, resulting in suitable for analyzing structures without initial defects. When neither a priori invitation nor pre-existing notch is provided, the fracture initiation is assumed to occur when the structure reaches its elastic limit, and a non-linear analysis is conducted under the prescribed load to identify the first occurrence of permanent strain and to locate where the crack opening occurs. As the crack propagates, solely linear elastic analyses are performed to calculate the stress intensity factors. Relying upon these parameters, the procedure implements an evolutionary algorithm based on a step-by-step evaluation of the crack increment and direction. A global–local energy-based criterion is employed to drive fracture propagation. Neither local refinement nor mapped meshes around the crack tip are required, resulting in a streamlined and efficient free-meshing strategy. The calculation has been implemented in a standard finite element environment, and several numerical examples have been investigated, both from a qualitative and quantitative point of view. Qualitative crack paths have been shown for a square hollow plate under pure tensile and shear loads, and a modified Single Edge Notched specimen in bending, as a function of the mutual void positions, distance from the plate edges, and different notch lengths. Finally, an effective comparison in terms of forces-displacement curves has been presented between the proposed procedure, and a lab test for a modified Compact Tension specimen under tensile loading, demonstrating the overall accuracy and reliability of the presented strategy. It is felt that the proposed procedure could pave the way for designing hollowed structures and investigating the corresponding evolutionary laws that relate structural geometries to the insurgence and spread of fractures, and envisaging crack initiation and propagation within inhomogeneous media
The impact of related parties’ transactions on sustainability performances: the Italian context
No full textPurpose: We analysed the influence of related parties’ transactions (RPTs) on environmental, social, and governance (ESG) performance. Methodology: The empirical analysis was conducted on a sample of Italian nonfinancial groups with parent companies listed on the Milan Stock Exchange during 2020-2021. Findings: The findings reveal that groups engaging more intensively in RPTs present lower ESG performance, meaning that RPTs signal weaker attention towards sustainability issues. The results are consistent with the conflict-of-interest view related to RPTs, revealing that the presence of RPTs brings in the expropriation of resources at the expense of sustainability issues. Managerial implications: The findings show a connection between financing decisions and sustainability activities, highlighting that companies involved whit RPTs could overcome their financial constraints by using these related transactions and tend to spend less attention on sustainability issues. However, the strategy to consider sustainability as a brand reputation tool, which can be dismissed once the return from the operational activity becomes positive, can be myopic considering that the ESG approach is oriented towards companies’ long-term prosperity. Research limits and Originality: We explored the relationship between RPTs and ESG performance, - a topic that has received little attention from academic research - in a setting characterized by companies with pyramid ownership structures, the presence of a dominant shareholder, and Type II agency problems. Therefore, the results cannot be generalized
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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