1,720,954 research outputs found
異方性二分子膜ハイドロゲルの構造・変形・疲労挙動に及ぼす膨潤の効果
No full textRecently, soft and tough hydrogels have gained significant attention for their potential wide applications in wearable devices, stretchable electronics, and soft robotics. These long-term applications of soft materials demand a comprehensive understanding of their fatigue resistance mechanisms and structural evolution under cyclic loading conditions. The term "fatigue resistance" encompasses both fatigue damage and fatigue fracture. Fatigue damage refers to irreversible changes in the mechanical properties of unnotched samples under cyclic loading, while fatigue fracture involves crack propagation in notched samples under cyclic loading. In this study, we investigated fatigue resistance behaviors along with the structure properties and deformation of an anisotropic bilayer hydrogel composite featuring periodically stacked, polymerized non-ionic surfactant (PDGI, polydodecyl glyceryl itaconate) bilayers embedded within an elastic polyacrylamide (PAAm) hydrogel matrix. The bilayer’s structure combines high toughness and self-resilience under monotonic loading, attributed to efficient energy dissipation by the PDGI bilayers, which function as reversible sacrificial bonds. Along with these excellent functionalities, this composite PDGI/PAAm hydrogel exhibits tunable structural color upon one-dimensional swelling and as prepared PDGI/PAAm gel exhibits better mechanical properties compared to swollen one reported by Lama et. at. Therefore, the effects of 1-dimentional swelling on the structural evolution, mechanical deformation and fatigue behaviors of this gel are also systematically studied for the first time. In this study, the composite hydrogel composition was kept constant, and fatigue testing was conducted over a fixed stretch ratio range to evaluate the long-term mechanical response of the lamellar bilayers. Prior to fatigue test, the structural properties and deformation behavior of the gel under loading and swelling effects on these performances were thoroughly investigated. We also compare the fatigue and fracture parameters of PDGI/PAAAm gels with those of other tough gels to illustrate the level of fatigue fracture resistance that can be achieved through 8 varying mechanisms. This study might underscore the importance of the bilayer architecture in enhancing the durability of anisotropic hydrogel composites. These findings contribute to advancing the design of fatigue-resistant soft materials for diverse applications, including wearable devices, skin-like actuators, and soft robotics in dynamic environments
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
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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