1,720,959 research outputs found
Influence of different post-washing solutions on the mechanical and surface properties of 3D-printed material for definitive restorations: an in vitro study
No full textObjective: To assess the influence of three different wash solutions on the flexural strength (FS), elastic modulus (E), surface microhardness (VHN), surface roughness, water sorption (Wsp), and solubility (Wsl) of a 3D-printed glass-reinforced composite resin (3D-CR). Methods: VarseoSmile Crown Plus was printed at a 50 μm layer thickness and a 90° build angle. Three test groups were formed based on the ultrasonic bath wash solution: InovaPrint Wash (Group 1), 96 % ethanol (Group 2), and 90 % denatured ethyl alcohol (Group 3). Thirty bar-shaped specimens (25 × 2 × 2 mm3), ten per group, were produced to measure FS and E using a three-point bending test, while five disk-shaped specimens (Ø 15 × 3 mm2) per group were employed to evaluate VHN. Both tests were conducted under dry conditions. Additionally, another set of five specimens (Ø 15 × 3 mm2) per group was used to assess surface roughness before and after simulated toothbrushing, while five disk-shaped specimens (Ø 15 × 1 mm2) were utilized to determine Wsp and Wsl over 28 days. Kruskal-Wallis and Bonferroni post hoc tests were applied for statistical group comparisons. Results: The Kruskal-Wallis test showed a significant difference between the groups in terms of FS (p = .008), E (p = .004) and in VHN (p = .001). Variations among groups were notable in Wsp and Wsl at 21 and 28 days (p = .001). Regarding the surface roughness, the specimens exhibited values surpassing the clinical acceptability threshold (0.2 μm) before and after brushing. Conclusion: These findings underscore the importance of selecting appropriate washing protocols to optimize the long-term performance of 3D-printed composite resins. Clinical implication: Optimizing the washing protocol can mitigate the degradation of mechanical and surface properties in 3D-printed composite resins. This is a critical consideration for ensuring the long-term success of definitive restorations
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
Effect of interim fixed prosthodontics materials and flowable composite resins on polymerization of polyvinyl siloxane impressions
No full textIndiana University-Purdue University Indianapolis (IUPUI
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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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