1,721,004 research outputs found
Usefulness of modular neck adapter in partial hip revision
Get PDFBackground and Objective: Modular neck adapters allow different length and offset changes to reach a stable total hip arthroplasty (THA) and permit a quick partial hip revision procedure without removing the existing components. The literature is poor on this matter and about the long-term related outcomes. This narrative review summarizes the most recent literature about these devices as an option of surgical treatment in partial total hip arthroplasty revision (THAr) focusing on indications, clinical and radiological outcomes, and related complications.Methods: The narrative review of the current available literature was conducted in December 2022 through electronic database. The terms used were: "Head neck taper" OR "Merete BioBall" AND "revision Total Hip Arthroplasty (MeSH Terms)". The timeframe was limited between 01/01/2000 and 01/12/2022. The studies regarding the clinical use of the Merete BioBall & REG; system in hip revision surgery were included, while all the papers concerning modular stem prosthesis were excluded.Key Content and Findings: The surgical procedure is safe, quick and allows the surgeon to correct a well-fixed stem version, length and offset, besides retensioning soft tissues. Clinical and radiological outcomes are good with low complications rates.Conclusions: The modular neck adapter system seems to be a good surgical procedure for recurrent dislocation of THA, especially in case of a second THAr surgery. However, the main indication of adapter use remains the isolated acetabular cup revision. The related complications are rare: the worst is the re-dislocation due to an insufficient stem version and length correction. Re-dislocation rates reported in literature vary from 5.2% to 15%. Corrosion or fretting of the modular system are not reported in literature
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Terrecotte in contesto funerario. L’età ellenistica
No full textIn età ellenistica (soprattutto dal tardo III secolo a.C.) le
terrecotte figurate sono utilizzate eminentemente nella
sfera funeraria, ma la loro presenza, anche nelle necropoli
che hanno restituito i corpora più significativi, si limita al
5- massimo 10% delle tombe, con l’evidente tendenza a
privilegiare, tra queste, alcune sepolture connotate da un
consistente numero di oggetti coroplastici, rispetto a quelle
più correnti con una-due terrecotte di corredo. In assenza,
per lo più, di dati antropologici, la tipologia, il rituale e
il formato delle tombe e l’esame degli indicatori di età e di
genere rivelano una connessione significativa delle figurine
con la fascia di età subadulta o infantile e una preminente
caratterizzazione “femminile”; questa tuttavia non riflette
di per sé l’effettivo genere del defunto, ma può essere dovuta
ad una concezione del bambino o fanciullo in connessione
alla sfera femminile, indipendentemente dal sesso
biologico. L’analisi dettagliata dei quattro casi al momento
più significativi – le necropoli di Lipari, Cefalù,
Centuripe, Lilibeo – evidenzia le modalità di uso specifiche
di ciascun centro e la ratio nella selezione dei temi figurativi,
integrati nel sistema funerario complessivo, che evocano
le qualità attribuite al defunto, le fasi/ruoli del ciclo
biotico e le relative transizioni. Diverse componenti
“intrecciate” dell’imagerie e del rito che le terrecotte paiono
sottendere rinviano all’idea della transizione e del “passaggio”:
l’immaginario e la prassi votiva “ribaltata” nel contesto
funerario offre ai defunti aoroi una possibilità di partecipare
virtualmente, attraverso un “doppio” simbolico,
alle pratiche religiose e al momento clou in cui essi, finalmente,
assumono un’identità.In the Hellenistic period, and particularly from late 3rd
century BC, terracotta figurines are used eminently in
funerary contexts. Terracottas appear in a tiny minority of
tombs (5- max 10%), and have a tendency to cluster in few contexts, containing many coroplastic objects, while the
others have just one-two figurines. Tomb type and size,
funerary ritual and several age or gender indicators (in the
absence of anthropological data) reveal a significant association
between figurines and childhood/subadult age, and
between figurines and feminine gender: it, however, does
not necessarily reflect the biological sex, but the idea that
children still belong in women’s sphere (regardless of their
sex). Four case studies – the necropolises of Lipari, Cefalù,
Centuripe, Lilybaeum – are examined in greater detail.
While showing specific modalities of use of figurines, all
these reveal a meaningful ratio in the selection of figural
themes, that evocate some qualities attributed to the dead,
phases/roles of the biotical cycle, and age transitions, and
are integrated into the funerary rites and symbolic universe.
As a matter of fact, several “entangled” traits of
iconography and ritual allusions of the figurines refer to
coming of age and rites of passage: imagery and votive
praxis were translated into funerary context in order to
allow the aoroi dead to take part virtually (through an
“avatar”) in rituals, and to be “present” in their heyday,
when finally they could achieve an identity
Busti fittili e Ninfe: sulla valenza e la polisemia delle rappresentazioni abbreviate in forma di busto nella coroplastica votiva siceliota
No full textDispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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