1,723,213 research outputs found
Fig 2. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D in Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam
No full textFig 2. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu. A. Habit; B. Culm sheath. [Photos by V. T. Nguyen]Published as part of Nguyen, Van Tho, Le, Viet Lam, Vu, Van Dung & Xia, Nian-He, 2012, Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam, pp. 255-259 in Candollea 67 (2) on page 258, DOI: 10.15553/c2012v672a6, http://zenodo.org/record/571021
Nanodielectrics for machine insulation
No full textThanks to the development of nanotechnology, epoxy nanocomposites have been expected to be potential candidates to replace the base resin, due to their superior properties. However, the effects of nano-fillers have been controversial, in both positive and negative ways. There are two main factors, comprising of stoichiometry and the nature of interfacial areas of nano-sized fillers, which are expected to contribute to the final properties of epoxy nanocomposites. The chosen stoichiometry is important in determining the nature of the polymer network that forms. A stoichiometric formulation with the optimal chemical balance between reactants will introduce good performance. However, incorporation of nano-fillers with large interfacial areas into epoxy matrices may modify the cure behaviour of the system, through introducing additional chemical reactions between moieties on the nano-filler surfaces and reactants, thereby altering the rate and sequence of the possible chemical reactions that occur during curing. These effects change the chemical balance of the original base resin system. As a result, the nature of the cross-linked network that forms may be altered.An investigation into the effects of stoichiometry and the nature of the interfacial surface of treated nanosilica particles of various sizes on properties of epoxy-based systems has been conducted, using the differential scanning calorimetry, space charge and ac breakdown measurements, and the dielectric spectroscopy. The introduction of nanosilica has induced changes in curing mechanisms and led to different impacts on systems of different resin stoichiometry. In addition, the investigation has revealed a key role of the characteristic interaction between the nanoparticle surface and the resin matrix in determining material properties, rather than the filler size. Weak interactions have produced negative impacts on material properties. The addition of nano-silica particles into conventional microcomposites has suggested the possible synergetic effects due to the presence of both nano and micro fillers.Furthermore, the long-term performance of the unfilled epoxy and its nanocomposites has been explored. Open branch trees with the faster propagation rate have been observed in nanocomposites, compared to the unfilled epoxy. The material degradation during partial discharge activities has also been evinced using the confocal Raman microprobe spectroscopy
Book Review: Nguyen, V. T. (2016). The Sympathizer: A Novel. New York, NY: Grove Atlantic. 384 pp. ISBN: 978-1543618020
Full text linkBook Review by Linh Dang: Nguyen, V. T. (2016). The Sympathizer: A Novel. New York, NY: Grove Atlantic
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
Fig 1. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D in Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam
No full textFig 1. – Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu. A. Culm and dormant bud; B. Culm sheath (abaxial view); C. Culm sheath (adaxial view); D. Leaf; E. Leaf ligule; F. Flowering branch; G. Pseudospikelet; H. Prophyll; I. Glume; J. Lemma; K. Palea; L. Pistil; M. Anther. [A-C: V. T. Nguyen NVT224, FSIV; D-M: V. T. Nguyen NVT260, FSIV] [Drawn by V. T. Nguyen]Published as part of Nguyen, Van Tho, Le, Viet Lam, Vu, Van Dung & Xia, Nian-He, 2012, Dendrocalamus velutinus N.-H. Xia, V. T. Nguyen & V. D. Vu (Poaceae), a new species from Vietnam, pp. 255-259 in Candollea 67 (2) on page 257, DOI: 10.15553/c2012v672a6, http://zenodo.org/record/571021
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
Nguyen v. INS: Is Sex Really More Important Now?
No full textNguyen v. INS, 208 F.3d 528 (5th Cir. 2000), cert. granted, 69 U.S.L.W. 3223 (U.S. Sept. 26, 2000) (No. 99-2071). The interplay between citizenship statutes and the promotion of sex equality has always held an uneasy truce under Equal Protection Clause jurisprudence. Prior to 1934, congressional citizenship statutes were strongly biased in favor of the father-only foreign-born children of citizen fathers could be considered U.S. citizens. Starting in 1940 and continuing in the post-war 1952 overhaul of the citizenship statute, Congress allowed the pendulum to swing in the other direction-against citizen fathers-partly in an attempt to limit citizenship claims from those "persons who would be a potential liability rather than an asset.", Out-of-wedlock foreign-born children with citizen mothers were granted automatic citizenship, while out-of wedlock foreign-born children with citizen fathers had to fulfill a number of requirements to gain citizenship
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