1,721,098 research outputs found
FIGURE 1 in Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil
No full textFIGURE 1. Guadalupe Environmental Protection Area, Pernambuco state, Northeast Brazil.Published as part of Barbosa, David Ítallo, Melo, Tiago Espósito O., Breyner, Fábio André & Cavalcanti, Laise De Holanda, 2021, Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil, pp. 231-236 in Phytotaxa 494 (2) on page 232, DOI: 10.11646/phytotaxa.494.2.6, http://zenodo.org/record/542341
FIGURE 2. Diderma aglomerospora D.I. Barbosa & L.H. Cavalcanti. Sporangium shapes A,B,C in Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil
No full textFIGURE 2. Diderma aglomerospora D.I. Barbosa & L.H. Cavalcanti. Sporangium shapes A,B,C(Bar=1mm), Capillitium D(Bar=5μm), E(Bar=10μm), Spores F(Bar=3μm), G(Bar=4μm), H(Bar=10μm), I(Bar=5μm).Published as part of Barbosa, David Ítallo, Melo, Tiago Espósito O., Breyner, Fábio André & Cavalcanti, Laise De Holanda, 2021, Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil, pp. 231-236 in Phytotaxa 494 (2) on page 234, DOI: 10.11646/phytotaxa.494.2.6, http://zenodo.org/record/542341
Projeto estrutural de um vant híbrido através do método de elementos finitos
Full text linkMonografiaOs Veículos Aéreos Não Tripulados (VANT’s) podem ser aplicados a diversas atividades, e isto tem despertado a atenção da indústria nos mais diversos ramos. Apesar do alto potencial dessa tecnologia, o desenvolvimento de projetos desse porte ainda são minorias, quando comparados à veículos aéreos de grande porte, e devido a carência de pesquisas relacionadas a esta área, novos estudos ainda são necessários para otimização dos projetos, principalmente relacionados a eficiência e segurança dos voos. Nesse sentido, a utilização do método de análise de elementos finitos pode proporcionar uma maior eficiência no desenvolvimento do projeto, permitindo análise de tensões, temperaturas, escoamento de fluidos, entre outras. Este trabalho apresenta o desenvolvimento do projeto estrutural de um veículo aéreo não tripulado, com característica de voo híbrida, que possui a capacidade para decolagem e aterrissagem vertical de um quadricóptero comum e um voo horizontal de longa duração como um avião. A metodologia aplicada consiste na elaboração do projeto conceitual seguido da fase de projeto detalhado, onde foi realizada a modelagem e simulação. Para os principais componentes estruturais do protótipo foi selecionado o material compósito de carbono, visando uma elevada resistência e baixo peso. Em todos componentes foram realizadas análises utilizando o método de elementos finitos, através do software Siemens NX. Os resultados da simulação são fornecidos juntamente com os dados de suas condições de contorno. Com as análises, foi possível observar a resistência dos componentes diante de esforços e, com isso, verificar em que parâmetros atuar para implementar melhorias na estrutura do equipamento.Trabalho não financiado por agência de fomento, ou autofinanciad
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
FIGURE 3 in Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil
No full textFIGURE 3. Phylogenetic tree based on the EF1a gene sequences with 10 taxons. Maximum likelihood bootstrap values are represented above the branches on the left side of the "/", and can range from 0-100. Values of the probability of the Bayesian inference are represented above the branches in the right part of the "/", which can vary between 0–1. The species Physarum polycephalum and Physarum pusillum were used as outgroup. The scale bar represents two substitutions. The codes within the parentheses refer to the access number of the NCBI.Published as part of Barbosa, David Ítallo, Melo, Tiago Espósito O., Breyner, Fábio André & Cavalcanti, Laise De Holanda, 2021, Diderma aglomerospora (Didymiaceae, Physarales, Myxomycetes), a new species from Brazil, pp. 231-236 in Phytotaxa 494 (2) on page 235, DOI: 10.11646/phytotaxa.494.2.6, http://zenodo.org/record/542341
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
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