1,720,964 research outputs found
New, noteworthy, and rare species of the genus Boletus in Israel
No full textThis paper presents information about Boletus poikilochromus, B. pulchrotinctus, and B. pulverulentus in Israel. These species are reported for the first time in Israel, and also B. pulchrotinctus and B. poikilochromus are reported for the first time in Asia. Furthermore, these three species are reported for the first time in association with Quercus calliprinos. Macro- and microscopical characteristics, distribution, ecology, and illustrations related to morphology and anatomy of the species are provided
Phylogenetic Analysis within Genera Morchella (Ascomycota, Pezizales) and Macrolepiota (Basidiomycota, Agaricales) Inferred from rDNA ITS and EF-1a Sequences
No full textThe relationships among species within Morchella and Macrolepiota were studied using nrDNA ITS and EF-1α sequences from 50 samples belonging to genera Gyromitra, Distiotis, Morchella, and Verpa; and 58 samples belonging to genera Macrolepiota, Leucoagaricus, and Chlorophyllum species from diff erent Fungi-ch-7.indd-15-02-2011.indd 159 31-10-2011 14:11:26 160 Systematics and Evolution of Fungi geographical areas. Maximum parsimony, maximum likelihood, and the Bayesian approach were conducted in order to build the phylogeny of these genera. Both genera appeared to be monophyletic; however, several ingroups appeared to be polyphyletic. The relationship of species within the genus Morchella was investigated using both molecular (nrDNA ITS and EF-1α) and morphological characteristics in order to re-evaluate the taxonomic position of several controversial species for which the taxonomic status is still unclear. Results showed that the genus Morchella is a complex of several species, which was separated into two main distinct groups: yellow (M. crassipes, M. esculenta s. str. and M. spongiola) and black morels [(M. elata s. str., M. costata, M. gigas, and M. vulgaris (= M. conica)]. Results supported evidence that Morchella elata and M. angusticeps are identical taxa, which was proposed in earlier publications. Morphological data together with molecular data did not support the proposals that M. esculenta and M. crassipes are the same species. After phylogenetic studies, the list of Morchella species of Israel was re-evaluated, and are currently represented by Morchella elata, M. esculenta, M. rufobrunnea, and M. vulgaris (=M. conica). Th e relationship of Macrolepiota species to one another within the genus was investigated using both molecular (nrDNA ITS and EF-1 alpha sequences) and morphological characteristics. Th e results supported evidence to transfer M. rachodes into the genus Chlorophyllum, which was proposed by earlier publications. M. fuliginosa and M. rhodosperma appear to be identical. Morphological data together with molecular data did not support the proposals to treat M. mastoidea and its closely related species as one taxon. Th e list of Macrolepiota species of Israel was re-evaluated, which is currently represented by M. affi nis, M. excoriata, M. excoriata var. rubescens, M. fuligineosquarrosa, M. konradii, M. mastoidea, M. procera, M. procera var. mediterranea, M. prominens, M. psammophila, M. rickenii, and M. subsquarrosa. Macrolepiota oliveri and M. rachodes were transferred to the genus Chlorophyllum. It was shown that for Morchella, EF-1α is informative, whereas for Macrolepiota – this is hardly so. With the topology presented for Macrolepiota based on EF-1α, it is logical to conclude that this marker is not that suitable for the resolution of species complexes that are closely related in this particular taxon, genus Macrolepiota. However, assuming that the complexes should be treated as the same species is probably premature
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
- …
