1,721,116 research outputs found
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
Così impari! Conflitto e trasformazione
No full textCosa concorre in occasione di un eventuale conflitto? A partire da due esperienze specifiche avvenute durante il corso, verranno esaminate le dinamiche personali, interpersonali e di gruppo, con un focus specifico sul più ampio contesto classe così come riportato dai racconti degli studenti coinvolti. Attraverso un commento reso in forma dialogica, si ripercorreranno gli aspetti che sono emersi come centrali: dai concetti di ‘potere’ e ‘volere’ all’importanza di creare un ‘ambiente’ protetto di gruppo e un setting che faciliti l’incontro. Infine, riflettendo sulle situazioni conflittuali come valore aggiunto in termini di apprendimento, si è notato che è possibile raggiungere una consapevolezza emotiva sia per se stessi che nel rapporto con gli altri attraverso l’acquisizione di specifiche competenze socio-emotive evitando così l’insorgere di ulteriori situazioni di scontr
Temporal variation of air pollution in a geothermal area of central Italy: assessment by the biodiversity of epiphytic lichens
No full textThe results of a biomonitoring survey carried out in the geothermal area of Travale-Radicondoli (central Italy) are reported. The aim of the study was to evaluate the temporal variation of air pollution from 1992 to the present, based on the actual biodiversity of the epiphytic lichens compared with that of a previous study in the same area. Although instrumental measurements were not available, it was assumed that variations in the lichen biodiversity mostly reflected changes in the air pollution status. Furthermore, adopting a "before-after" strategy, the impact of a sansa oil extraction plant built in 1993 was also evaluated. The results showed that after 8 years, the geothermal area of Travale-Radicondoli is undergoing a gradual process of improvement, as clearly indicated by the colonization of some lichen species in areas previously affected by the "lichen desert". The surroundings of the geothermal power plants did not show evident changes from the previous study, as the biodiversity values remained low. The sansa oil extraction plant had a noticeable environmental impact that caused the air quality to worsen
Primary parapharyngeal tumours: a review of 21 cases
No full textAbstract
Background
The diagnostic and therapeutic procedures per-
formed in a series of patients with primary parapharyngeal space
(PPS) tumours treated at the ENT Departments of San Giovanni
Bosco Hospital, Turin, and of t
he Pugliese-Ciaccio Hospital,
Catanzaro, Italy, in the period 2001
–
2010 are evaluated.
Materials and methods
The retrospective review included 20
patients, 11 male and 9 female, average age of 41 years
operated on for 21 primary PPS tumours. The most common
tumours found were neurogenic neoplasms, while those of
salivary origin were the next most common.
Results
There were 14 paragangliomas (7 originating from ca-
rotid glomus, 5 from vagal and 2 from tympanicum), 1 sympa-
thetic chain schwannoma and 6 pleomorphic adenomas. All the
tumours were benign in nature and gave rise to few signs or
symptoms. Patients underwent preoperative computed tomogra-
phy (CT) scan or magnetic resonance imaging (MRI) or both.
Most contrast-enhanced masses were submitted to some type of
angiography. Most of the surgeries were planned through imag-
ing alone, as preoperative fine needle aspiration (FNA) biopsy
was performed only in six cases. Four different approaches were
adopted for tumour removal: transcervical, transcervical/
transparotid, cervical-tran
sparotid-transmandibular and
infratemporal fossa approach. There was no operative mortality,
though neurologic morbidity was significant. Follow-up, extend-
ed to a maximum of 11 years, did not reveal any recurrences. In
conclusion, neurogenic tumours may be the most common of
PPS masses. Surgery is the mainstay treatment and external
approaches offer the potential for satisfactory tumour resection.
Of such external approaches, transcervical and cervical/
transparotid are the most often used in benign forms.
Conclusion
The number of perioperative complications en-
countered in this series confirms the difficulty of performing
surgery in this complex area, even in benign cases. The
chances of avoiding vascular damage and saving the trunks
or most of the nerve fibres involved depend not only on the
skill and experience of the surgeon but also on the anatomy of
the lesion, the type of connection between the tumour and the
nerve from which it originates and the distribution of neural
fibres in or around the tumour mass
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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