1,721,029 research outputs found
Seismic Response of a Strategic Building in Catania (Italy) by 2-D FEM Analysis
No full textAbstractIn the last 900 years, the east coast of Sicily has been struck by several disastrous earthquakes. The earthquakes occurred in 1169, 1542, 1693, 1818, 1908 and more recently in 1990, with estimated magnitudes, ranging from less than 5.0 to greater than 7.0, testify the high level of hazard in this area. Many towns were destroyed during the above-mentioned earthquakes. The high level of seismicity that affects the area, together with the considerable high density of inhabitants living in its urban area, contribute to classify it as one of the area having the highest seismic risk in Italy. It is also not negligible the high potential damage to which its historic-architectural patrimony could undergo even at moderate magnitudes. Many researches show that the site seismic response is strongly influenced by stratigraphic and topographic features. Site response can reduce or amplify the earthquake induced ground motion. In this study seismic response of strategic building located in Catania has been done, and main results are presented
Anaplastic lymphoma kinase: activating mechanisms and signaling pathways
No full textThe discovery of Anaplastic Lymphoma Kinase (ALK) by Stephan Morris and colleagues twenty years ago has led to an unprecedented opportunity and provided the basis for a novel and clinically powerful stratification of human cancers. The molecular and biological characterization of ALK and the recognition of alternative mechanisms of activation of the tyrosine kinase receptors have then set the basis for the development and the subsequent application of selective small molecules. These achievements have fostered a new era in oncology, and the result of this new avenue has drastically changed the expectation of many cancer patients. Here we review the mechanisms of ALK activation and the modalities that drive ALK pathogenesis
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
Evaluation of root tensile strength of some mediterranean plant species for slope stabilization
Full text linkDa sempre l’uomo ha usato le piante per proteggere i pendii da fenomeni di instabilità superficiale e dai processi di erosione causati dall’acqua e dal vento. Negli ultimi decenni l’uso delle specie arbustive si è diffuso nell’ambito dell’ingegneria civile e ambientale e l’approccio naturalistico per la stabilizzazione superficiale di pendii ha acquisito un ruolo sempre più importante. Per questo motivo la metodologia di intervento di tipo naturalistico per la stabilizzazione dei versanti è sempre più studiata e sperimentata, sulla base dei concetti esposti dall’Ingegneria Naturalistica. Per comprendere meglio i meccanismi di interazione fra terreno e radici e valutare l’effetto delle radici delle piante sulla resistenza al taglio del terreno, occorrono approfondimenti di natura teorica e sperimentale sull’analisi dei meccanismi di interazione terrenoradici e sulle caratteristiche meccaniche delle radici. Il presente lavoro ha l’obiettivo di fornire un contributo in termini di proprietà meccaniche di radici di piante di specie autoctone. In particolare, è stata studiata la resistenza a trazione di due specie della macchia mediterranea, mediante una serie di prove sperimentali in laboratorio svolte presso il Dipartimento di Ingegneria Civile e Architettura dell’Università di Catania. I risultati indicano che la resistenza a trazione delle radici è influenzata da molti fattori, fra i quali i più importanti sono il tipo di specie e il diametro della radice. Il contenuto d’acqua ed i luoghi nei quali le piante sono cresciute hanno certamente un ruolo significativo, che però non è stato affrontato in questo studio.Men always have used plants to protect slopes from water and wind erosion. During last decades, this use has spread in civil and environmental engineering. Naturalistic approach for slope stabilization and erosion control has been studied and experimented, on the basis of concepts of soil bio-engineering. To better understand soil-root interaction mechanism and to evaluate plant root effects on soil shear strength and slope stability, theoretical and experimental studies about plant biotechnical and mechanical characteristics are needed. This work provides indications on mechanical strength parameters of the roots of two native Mediterranean species that have been studied by means of a series of experimental laboratory tests carried out at the Department of Civil Engineering and Architecture of University of Catania
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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