1,720,972 research outputs found
CRANIOPLASTICHE CUSTOM MADE
Full text link“Cranioplastica” identifica sia la protesi, sia l’atto chirurgico per allocarla. Chi studia l’argomento non può quindi esimersi dalla contaminazione e continua osmosi fra i risultati della ricerca di base (materiali, prototipazioni custom made, osteomimesi) e la ricaduta clinica (soluzioni tecniche e chirurgiche innovative). La visione d’insieme dell’argomento, con un inquadramento sui materiali, sulla tecnologia “su misura”, sulle tipologie di protesi e sulle varie applicazione possibili è essenziale per meglio focalizzare di “cosa si sta parlando” (Capitolo 1: La cranioplastica). Ma qualsiasi approfondimento presuppone un attento studio epidemiologico (Capito 2: Panoramica delle criticità). L’analisi della casistica mondiale di quasi 3.000 protesi “su misura” in idrossiapatite porosa (HA) ha permesso di confermare non solo che gli eventi critici sono le fratture (1,66%) e le infezioni (1,77%), ma di comprendere come questi possono essere influenzati dall’area cranica coinvolta e dallo stato clinico del Paziente. Sebbene la protesi in HA presenti una fragilità primaria, questo suo principale limite può essere amplificato da una errata progettazione del manufatto e da una non ottimale collocazione durante l’atto chirurgico. Infatti, le prove di carico su un modello sperimentale (Capitolo 3: Il peso dell’errore “umano” sulla fragilità della protesi) hanno evidenziato che i punti di criticità della protesi, se progettata in modo non ottimale, sono sottoposti ad un carico maggiore che può andare dal 50% all’80% in più rispetto alla cranioplastica realizzata e posizionata correttamente. Anche da questo, la ricaduta clinica con una disamina critica e propositiva (Protocollo Simpson) di come affrontare e cercare di risolvere le problematiche inerenti le cranioplastiche, basandosi soprattutto sull’esperienza personale (Capitolo 4: L’affinamento della tecnica chirurgica per prevenire le complicanze. Capitolo 5: La validazione della tecnica di demolizione-ricostruzione cranica in un unico tempo e l’innovazione del craniofilling. Capitolo 6: La complicanza più temibile per il mantenimento della protesi).Il raggiungimento di una stabilità secondaria della protesi può essere accelerato favorendo l’osteomimesi grazie all’utilizzo dei fattori di crescita (Capitolo 7: La rigenerazione ossea e dermica nelle cranioplastiche in idrossiapatite porosa). Affrontare la galassia “cranioplastica” è, comunque, sempre un work in progress (Capitolo 8: Le prospettive future). Già adesso sappiamo, ad esempio, che l’HA può essere lavorata, nello stesso pezzo, in due modalità: superficialmente in modo compatto (come la corticale ossea) ed in profondità in modalità porosa, come è realizzata per ora, al fine di mantenere la caratteristica essenziale per l’osteomimesi. Quest’ultima probabilmente potrà trovare nuovo impulso non solo nell’utilizzo di fattori di crescita, ma grazie alla magnetizzazione della protesi stessa
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
Stereotactic Radiosurgery Maningiomas
No full textSchmidek and sweet operative neurosurgical techniques: indications, methods, and results
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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