1,721,018 research outputs found
Il benessere illuminotecnica nelle agenzie di banca: analisi dei risultati di una campagna sperimentale in agenzie del territorio umbro
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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
Prestazioni acustiche intrinseche di barriere di tipo innovativo: metodi di valutazione in laboratorio e in campo libero simulato
No full textNell’ambito di un Accordo di Programma tra CIRIAF e Ministero dell’Ambiente, inerente la sperimentazione di sistemi innovativi integrati di abbattimento del rumore e sfruttamento delle fonti rinnovabili di energia, si sono misurate le proprietà acustiche intrinseche di campioni di barriere antirumore ed elementi antidiffrazione; le misure sono state eseguite sia nelle camere riverberanti del Laboratorio di Acustica dell’Università di Perugia che in campo libero simulato, in un sito appositamente predisposto. Si sono valutate, ai sensi degli standard EN 1793, le seguenti grandezze: S, R, RI, SI e DI.
Il lavoro riporta i risultati ottenuti e alcune osservazioni sulle metodologie di misura in situ. In particolare, le misure in situ di Reflection Index RI presentano una maggiore difficoltà di caratterizzazione per i campioni aventi geometria complessa e superfici composite. In tali casi, solo un maggior numero di posizioni di misura sembra adeguato al fine di ottenere risultati rappresentativi. La ripetibilità dei metodi in situ appare soddisfacente per SI, inferiore per RI. I valori di Sound Insulation Index SI appaiono congruenti con quelli forniti da modelli teorici di fonoisolamento; si osserva una discreta correlazione tra grandezze omologhe misurate in laboratorio e in situ. Sono infine riportati i risultati di misure preliminari per la caratterizzazione di un elemento antidiffrazione
Clinical features of mtDNA-related syndromes in adulthood
No full textMitochondrial diseases are the most common inheritable metabolic diseases, due to defects in oxidative phosphorylation. They are caused by mutations of nuclear or mitochondrial DNA in genes involved in mitochondrial function. The peculiarity of “mitochondrial DNA genetics rules” in part explains the marked phenotypic variability, the complexity of genotype-phenotype correlations and the challenge of genetic counseling. The new massive genetic sequencing technologies have changed the diagnostic approach, enhancing mitochondrial DNA-related syndromes diagnosis and often avoiding the need of a tissue biopsy.
Here we present the most common phenotypes associated with a mitochondrial DNA mutation with the recent advances in diagnosis and in therapeutic perspectives
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