1,720,985 research outputs found
PHYSICAL, MORPHOLOGICAL, AND MECHANICAL CHARACTERIZATION OF RECYCLED HYBRID NON-WOVEN MATS AS A CONTINUOUS FIBROUS REINFORCEMENT FOR NOVEL ECO-SUSTAINABLE PMMA THERMOPLASTIC COMPOSITES FABRICATION
No full textNowadays, global objectives have given special attention to sustainability and circular economy
in every sector, such as the composite industry. Therefore, the popularity of thermoplastic
composites reinforced with recycled non-woven fabrics has been intensified for lightweight
material fabrication. Particular attention has been given to hybrid tissues obtained from recycled
Glass and Carbon fibers. In this paper, primarily the properties of dry TNT made from recycled
Glass (GFs) and Carbon fibers (CFs) were evaluated. Afterward, these mats were impregnated
with two different types of Elium resin (Arkema Co.) and were utilized to fabricate thermoplastic
composite via vacuum infusion system in order to distinguish better impregnation. Finally, the
polymeric composites were characterized from physical, morphological, and mechanical points
of view.
ELIUM® C 040 and ELIUM® 158 O were purchased from Arkema Co. with peroxide
polymerization using two various components, BENZOCLEAN and PERKADOX. CarbonTask
Co. supplied GF/CF non-woven fabrics. In the first phase, dry hybrid GF/CF non-woven mats
were analyzed to indicate their areal density, morphology, and tensile behavior. Density
measurements were performed with METTLER TOLEDO Balance for 4cm2 samples. Tensile
analysis of dry hybrid non-woven mats was done by Zwick-Roell Z10 machine longitudinally and
transversally. In the second experimental phase, dry hybrid GF and CF non-woven
reinforcements were impregnated with two diverse types of Elium resin to produce
thermoplastic composites via vacuum infusion method. At last, the composites were cut and
examined to indicate their morphology, tensile characteristics, and flexural properties.
As dry non-woven mats were analyzed mechanically, it was revealed that due to the CF content
enhancement, the mechanical performance of the non-woven fabrics was improved. GFs and
CFs were distributed randomly through the non-woven fabrics. In the last phase of the
experimental work, the fabrics will be impregnated with two kinds of PMMA resins with various
viscosity to investigate higher reinforcement content with superior mechanical properties.
Tensile properties, flexural behavior, and morphological observations will be demonstrated.
In this work, hybrid recycled non-woven mats based on GF and CF were impregnated with two
different kinds of Elium thermoplastic resins (Arkema Co.) to investigate the composite
fabrication process and the corresponding properties. The focus of the project in the next step
is to refine the vacuum infusion method for composite production, an autoclave system to
maximize vacuum pressure will be utilized. Another option is to fabricate composites through
Resin Transfer Moulding (RTM
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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