1,720,987 research outputs found
L’{Intelligenza} {Artificiale} ed il problema dell’agency dal punto di vista bibliografico
Full text linkSkull base metastasis of a breast carcinoma
No full textSkull base metastases from primary malignant tumors are relatively uncommon lesions. They
usually originate from the breast, lung, prostate, skin, liver and cervix. We report a case of a 76 years
old female complaining of dizziness, mild left hearing loss, tinnitus and recurring left facial paresis.
A computed tomography scan of the temporal bones documented a much extended osteolytic lesion
of the left temporal bone. A left mastoidectomy evidenced a soft-tissue etheroplastic mass involving
diffusely the middle ear. Several bioptic specimens were obtained and the definite histopathological
response was breast lobular carcinoma metastasiss
Studi mediterranei e politiche di internazionalizzazione tra Spagna e Sardegna. Le scienze del libro e del documento all’Università di Cagliari
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
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
Superior canal dehiscence and ‘near-dehiscence’ syndrome: clinical and instrumental aspects.
No full textEven though superior canal dehiscence syndrome (SCDS) has already been
widely studied from a clinical, etiopathogenetic and therapeutic point of view,
some diagnostic aspects have yet to be clarified. It is well-known that highresolution
CT (HRCT) scan tends to overestimate the prevalence of the bony
defect requiring the detection of lowered thresholds of air-conducted (AC) VEMPs
to confirm the diagnostic suspect. The most recent definition of the so-called
near-dehiscence syndrome (NDS), in which an extremely thinned bony roof of
the superior canal results in the onset of a symptomatological scenario overlapping
SCDS, has allowed to explain most cases of incongruence between imaging
analyses and electrophysiological data. Moreover, no univocal explanation to
the wide symptomatological and semeiological variability of SCDS has been
offered yet. The aim of this paper is to face the diagnostic dilemma offered by
the complexity of this two-fold syndrome (SCDS vs NDS) reviewing the clinical
and instrumental data and submitting to statistical analyses a subsample of
100 patients (193 ears) selected from a group of 242 patients (114 M, 128 F,
mean age 56.8 y, range 8-88 y) showing a dehiscence or a an extreme thinning
of the superior canal at least from one side at HRCT scans. Firstly, we
verified the effectiveness and the diagnostic accuracy of imaging in confirming
electrophysiological data, considering the threshold lowering of AC cervical
VEMPs as the gold standard in diagnosing an increased inner-ear admittance
due to SCD and we offered physiopathogenetic explanation for those cases of
incongruence between results. Secondly, we sought among instrumental set (AC
and BC cervical and ocular VEMPs, video head impulse test) the test allowing
the best diagnostic criteria for ‘near dehiscence’ and the parameter correlating
most significantly with the size of dehiscence in case of SCDS. While mostly
all data collected can reliably differentiate SCDS from NDS, from this study
emerges that ocular VEMPs represent an effective method to detect the ‘neardehiscent’
condition among the normal cases
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