1,721,119 research outputs found
Addition to Micropeltidaceae: Micropeltis goniothalamicola sp. nov. and new record of Scolecopeltidium menglaense from Chiang Rai, Thailand
No full textMarasinghe, Diana S., Hongsanan, Sinang, Boonmee, Saranyaphat, Xie, Ning (2021): Addition to Micropeltidaceae: Micropeltis goniothalamicola sp. nov. and new record of Scolecopeltidium menglaense from Chiang Rai, Thailand. Phytotaxa 487 (1): 56-64, DOI: 10.11646/phytotaxa.487.1.4, URL: http://dx.doi.org/10.11646/phytotaxa.487.1.
FIGURE 3 in Addition to Micropeltidaceae: Micropeltis goniothalamicola sp. nov. and new record of Scolecopeltidium menglaense from Chiang Rai, Thailand
No full textFIGURE 3. Scolecopeltidium menglaense (MFLU 19–1009). a–c Ascomata on living leaf surface. d Squash mount of ascoma. e The upper wall. f Paraphyses. g–k Immature to mature asci. l–m Ascospores. Scale bars: c = 100 µm, d = 50 µm e = 25 µm, f–k = 10 µm, l–m = 5 µm.Published as part of Marasinghe, Diana S., Hongsanan, Sinang, Boonmee, Saranyaphat & Xie, Ning, 2021, Addition to Micropeltidaceae: Micropeltis goniothalamicola sp. nov. and new record of Scolecopeltidium menglaense from Chiang Rai, Thailand, pp. 56-64 in Phytotaxa 487 (1) on page 61, DOI: 10.11646/phytotaxa.487.1.4, http://zenodo.org/record/542276
A graph theory based methodology for optimal PMUs placement and multiarea power system state estimation
No full textThis paper proposes a novel methodology based on the graph theoretical observability analysis for optimal placement of phasor measurement units (PMUs) in a power system. The proposed method identifies the optimal PMUs number, their strategic location and the minimum set of critical measurements aimed at ensuring the complete system observability. Besides, we demonstrated that the identified monitoring asset allows us to decompose the overall power system into a minimum number of decoupled non-overlapping observable islands. Thanks to this feature each island can assess its state by processing only local variables without the need for a central fusion center acquiring and processing all the PMUs measurements. Consequently the state of the entire power system can be estimated according to a distributed and decentralized computing paradigm. Numerical results obtained on several large case studies, including both IEEE test networks and national power systems, confirm the effectiveness of the proposed methodolog
Dynamic computing paradigm for comprehensive power flow analysis
No full textreformulate the power flow equations into a set of ordinary differential equations, whose equilibrium points represent the power flow problem solutions. Starting from the Lyapunov theory, the authors demonstrate that this system of dynamic equations is characterised by an exponential asymptotic convergence to equilibrium points. This feature allows us to overcome the inherent limitations of the traditional iterative minimisation algorithms that can fail to converge because of the highly non-linearities of the first-order condition. Extensive simulation studies aimed at demonstrating the effectiveness of the proposed methodology are presented and discusse
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
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