1,720,954 research outputs found
Physiological data collection to detect emotional state during XR experiences: a pilot study in military education
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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
New measures to evaluate the efficacy of custom-made endoprosthesis implantation: the case of total ankle arthroplasty.
No full textreservedLa protesi totale di caviglia (TAR) rappresenta un’alternativa conservativa dell’articolarità rispetto all’artrodesi nel trattamento dell’artrosi avanzata di caviglia. Gli impianti attualmente disponibili mostrano risultati clinici incoraggianti, ma la loro longevità rimane inferiore rispetto ad altre artroprotesi, principalmente a causa della limitata adattabilità anatomica dei modelli standard “off-the-shelf” (OTS). Una copertura ossea insufficiente e una scarsa congruenza delle superfici di resezione possono determinare una distribuzione irregolare dei carichi, micromovimenti e un allentamento precoce dei componenti. I recenti progressi nell’imaging medico, nella modellazione computazionale e nella stampa 3D hanno reso possibile lo sviluppo di protesi personalizzate, in grado di superare tali limitazioni. La presente tesi è stata svolta nell’ambito dello studio clinico 3POD (3D Printing in Orthopaedics for Personalized Devices) presso l’Istituto Ortopedico Rizzoli, che confronta protesi di caviglia standard OTS con impianti completamente personalizzati. Il lavoro si concentra esclusivamente sul flusso di pianificazione personalizzata, sviluppato a partire da una configurazione OTS di riferimento, identificata nel sistema BOX TAR. Da questa base, è stato elaborato un piano custom attraverso la ricostruzione tridimensionale dell’anatomia del paziente, consentendo un adattamento mirato in termini di dimensionamento, posizionamento e orientamento dell’impianto. È stato quindi definito un framework metodologico per la valutazione quantitativa dei sistemi di protesi personalizzate di caviglia, confrontando pianificazione OTS, pianificazione custom e configurazione postoperatoria. Sono stati misurati diversi parametri geometrici e spaziali, tra cui le superfici di copertura articolare, le distanze lineari tra punti anatomici e gli angoli rappresentativi dell’orientamento e dell’allineamento complessivo dei componenti. Tali parametri sono stati scelti per valutare sia l’accuratezza anatomica della pianificazione personalizzata, sia le eventuali deviazioni introdotte durante la fase chirurgica. L’analisi statistica è stata condotta mediante test dei ranghi con segno di Wilcoxon, adatto a campioni appaiati non parametrici con bassa numerosità. I risultati preliminari indicano che la pianificazione personalizzata consente una migliore copertura ossea, grazie a una conformità superiore dell’impianto all’anatomia del paziente. Ne consegue una riduzione delle distanze tra i componenti protesici e le cortecce ossee, suggerendo una copertura più completa delle superfici osteotomiche rispetto alla pianificazione OTS. Le misurazioni postoperatorie hanno permesso di verificare la corrispondenza tra la configurazione chirurgicamente ottenuta e quella pianificata, rappresentando un indicatore dell’accuratezza e dell’efficacia dell’esecuzione chirurgica. Complessivamente, questo lavoro introduce un metodo riproducibile per la valutazione quantitativa delle protesi di caviglia personalizzate, contribuendo all’ottimizzazione della progettazione, dell’esecuzione chirurgica e della validazione clinica delle soluzioni ortopediche personalizzate.
Parole chiave: Protesi totale di caviglia personalizzata, Stampa 3D, Biomeccanica della caviglia, Additive Manufacturing, Congruenza osso–impianto, Progetto 3POD.Total ankle replacement (TAR) is a motion-preserving alternative to arthrodesis for end-stage ankle osteoarthritis. Current implants show encouraging clinical outcomes, but their longevity remains limited compared to other joint arthroplasties, mainly due to the restricted anatomical adaptability of standard off-the-shelf (OTS) designs. Insufficient bone coverage and poor congruence at the resection planes can produce uneven load distribution, micromotion, and early loosening. Recent developments in medical imaging, computational modeling, and additive manufacturing have enabled patient-specific prostheses, offering potential solutions to these limitations. This thesis was carried out within the 3POD (3D Printing in Orthopaedics for Personalized Devices) clinical trial at the Rizzoli Orthopaedic Institute, which compares standard OTS ankle prostheses with fully customized implants. The work focuses exclusively on the customized planning workflow, starting from a conventional OTS configuration. As a reference, the BOX TAR system was considered the standard OTS planning approach. From this baseline, a customized plan was developed through three-dimensional reconstruction of the patient’s anatomy, enabling tailored implant sizing, positioning, and orientation. A methodological framework was defined to quantitatively assess patient-specific TAR systems, comparing OTS planning, custom planning, and postoperative conditions. Several geometric and spatial parameters were measured, including articular coverage surfaces, linear distances between anatomical landmarks, and angular values describing component orientation and overall alignment. These parameters were selected to evaluate both the anatomical accuracy of custom positioning and potential deviations introduced during surgery. Statistical analysis was performed using the Wilcoxon signed-rank test, suitable for non-parametric paired datasets with small sample variability. Preliminary results indicate that customized planning provides improved bone coverage, as the implant better conforms to the patient’s anatomy. Consequently, distances between prosthetic components and cortical borders are reduced, suggesting a more complete coverage of the osteotomy surfaces compared to the OTS approach. Postoperative measurements were taken to verify correspondence between the achieved configuration and planning design intent, representing an indicator of surgical accuracy and effectiveness. Overall, this work introduces a reproducible framework for the quantitative evaluation of patient-specific ankle prostheses, supporting optimization of implant design, surgical execution, and clinical validation of personalized orthopaedic solutions.
Keywords: Custom TAR, 3D Printing, Ankle Biomechanics, Additive Manufacturing, Bone–implant Congruence, 3POD Project
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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