1,721,066 research outputs found
Long Path DOAS system for tropospheric radicals measurements
No full textHigh-resolution long path Differential Optical Absorption Spectrometer (DOAS) for tropospheric OH and NO2 measurements is under development at the University of L’Aquila. The instrument uses a yag laser that emits at 532nm for NO2 measurements and a ti:sapphire laser, pumped by the yag-laser, that emits at 308nm for OH measurements. The atmospheric absorption light path is of 5km of total length using a retroreflector array 2.5 km from the laboratory. The spectrometer is an 2m focal length Echelle grating with CCD as detector and a linear dispersion of 0.3pm/pixel at 308nm and 0.57pm/pixel at 532nm. First laboratory tests of OH and NO2 will be shown
Cetemps Hydrological Model (CHyM), a distributed grid-based model assimilating different rainfall data sources
No full text
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
La divisione tra Francesco e Guido Visconti (1473). Dalla fonte d’archivio al rilievo dell’architettura del castello di Somma Lombardo
No full textAmbiti di studio e competenze diversi, come l’analisi storica, la filologia documentale e quella che potrebbe essere definita una sorta di ‘filologia materiale’ ottenuta applicando elementi di lettura stratigrafica all’osservazione dei caratteri architettonico-costruttivi dell'edificio, hanno alimentato questo studio sul castello di Somma Lombardo. L’accostamento delle diverse attrezzature critiche è utile e sono molti i casi studio che hanno mostrato la fertilità di un tale approccio, invitando a percorrerlo anche a Somma. Riattivatosi il lavoro sulle fonti d’archivio, si ritiene quanto mai necessario procedere parallelamente all’analisi della consistenza fisica e materiale dell’architettura del castello la quale non solo da tempo appare ancorata ad alcuni esiti storiografici ma per la quale, con urgenza, si pongono quesiti di manutenzione e di restauro cui occorre accostarsi consapevoli del valore testimoniale dell'architettura stessa.
In ragione della particolarità e della vastità del caso si è data priorità ad alcuni temi e due questioni, in particolare, hanno sollecitato un approfondimento degli aspetti documentali, con ricerca dei riscontri materico-costruttivi sul corpo della fabbrica:
- l’opportunità di evidenziare, attraverso l’analisi dei caratteri costruttivi dell’articolata dimora di pieno Novecento, una sequenza cronologica di interventi edilizi da riordinare a ritroso, legandosi ai diversi rami familiari, fino a raggiungere la fase nota più antica;
- l’interesse per le vicende costruttive legate alla suddivisione della struttura castellana in due parti, all'epoca di Francesco e Guido Visconti (1473) figli di Battista.
In merito a quest'ultimo aspetto si è osservato che alcune superfici esterne e i sottotetti del castello, in particolare, in cui sopravvivono ampie porzioni di intonaci graffiti e rapporti stratigrafici evidenti perché non occultati da sovrapposte intonacature, mostrano tracce verosimilmente riconducibili alle fasi che precedono tale divisione, cioè il 1473, consentendo quindi un opportuno confronto tra fonti dirette e indirette e dimostrando la straordinaria rilevanza di parti meno note e 'valorizzate' del castell
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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