1,721,375 research outputs found
Effect of the Incorporation of Antiviral Fillers into 3D-Printing Resin
No full textThe recent pandemic has demonstrated an urgent need for not only improved PPE, but also the availability of 3D printable materials that can be used and printed on demand in a healthcare environment. The objective of this research was to determine the effect of 5 antiviral fillers (5 and 10 w/w%) on the photopolymerization kinetics, depth of cure and flexural strength on a surgical guide3Dprintingresinusedindentistry. Fivedifferentantiviralfillers[BioSafeGlass(quaternary ammonium modified glass) and 4 different zeolites doped with different ion releasing capabilities (Ag only, Cu only, Ag/Cu and Ag/Zn)] were studied. The photopolymerization kinetics on thin films of these mixtures was measured using FTIR-ATR. The depth of cure was measured using the ISO4049 method. Flexural strength was assessed using specimens with a 2mm x 2mm x 20mm geometry in 3-point bend. Inclusion of up to 10 wt% of the fillers did not significantly affect the rate of polymerization of the thin films. While different fillers reduced the depth of cure to varying degrees, all of the composites cured to a depth that well exceeded the resolution of SLA 3D printed parts. Inclusion of 5 and 10 wt% BioSafe glass resulted in a significant decrease in the flexural strength of the composite relative to the neat resin. The zeolite filled composites either had comparable (5 and 10 wt% Cu; 5 wt% Ag, 5 and 10 wt% Ag/Cu) flexural strength to the neat resin or statistically increased (10 wt% Ag and 5 and 10 w% Ag/Zn) the flexural strength. 3D-printable resins mixed with antiviral fillers have the potential to be prepared as colloids for use as 3D printed parts for use in dentistry.ProQuest Traditional Publishing Optio
Isogeometric analysis of ice accretion on wind turbine blades
Full text linkFor wind turbines operating in cold weather conditions, ice accretion is an established issue that remains an obstacle in effective turbine operation. While the aerodynamic performance of wind turbine blades with ice accretion has received considerable research attention, few studies have investigated the structural impact of blade ice accretion. This work proposes an adaptable projection-based method to superimpose complex ice configurations onto a baseline structure. The proposed approach provides an efficient methodology to include ice accretion in the high fidelity isogeometric shell analysis of a realistic wind turbine blade. Linear vibration and nonlinear deflection analyses of the blade are performed for various ice configurations to demonstrate the impact of different ice accretion distributions on structural performance. These analyses indicate decreases in the blade natural frequencies and deflection under icing conditions. Such ice-induced changes clearly reveal the need for structural design consideration for turbines operating under icing conditions.This is a pre-print of the article Johnson, Emily L., and Ming-Chen Hsu. "Isogeometric analysis of ice accretion on wind turbine blades." (2020). Posted with permission.
Published as Johnson, Emily L., and Ming-Chen Hsu. "Isogeometric analysis of ice accretion on wind turbine blades." Computational Mechanics 66, no. 2 (2020): 311-322. https://doi.org/10.1007/s00466-020-01852-y
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
Anxiety sensitivity is associated with attentional bias for pain-related information in healthy children and adolescents
No full textAppropriate 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
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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