1,721,698 research outputs found
Une nouvelle plante protocarnivore : Paepalanthus bromelioides Silv. (Eriocaulaceae) du Brésil
No full textPaepalanthus bromelioides Silvestri (Eriocaulaceae) from the Cerro do Cipo, Brasil, is a new protocarnivorous plant mimicking Bromeliaceae, and sharing with three of them (Catopsis berteroniana, Brocchinia reducta and B. hechtioides) carnivorous tendencies : U.V. reflexion by leaves, central tank, lubricating and wettable liquid, absorbing trichomes, acid pH of water within the tank, etc.. However, prey digestion is apparently carried out by bacteria only, as in the above mentionned Bromeliaceae. A complex arthropod assemblage lives between the leaves, within tank water, and in the inflorescences.Figueira José Eugénio Cortes, Vasconcellos-Neto Joao, Jolivet Pierre. Une nouvelle plante protocarnivore : Paepalanthus bromelioides Silv. (Eriocaulaceae) du Brésil. In: Revue d'Écologie (La Terre et La Vie), tome 49, n°1, 1994. pp. 3-9
Figure 1 in Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae)
No full textFigure 1. Climatic diagram of Serra do Japi, São Paulo, Brazil, registering the temperature and precipitation of the period between 2011 and 2013. Areas containing vertical lines in white areas indicate humid periods; vertical lines in dark areas, super-wet periods; and dotted areas, dry periods.Published as part of Messas, Yuri Fanchini, Souza, Herbert Silva, Gonzaga, Marcelo O. & Vasconcellos-Neto, Joao, 2017, Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae), pp. 2661-2679 in Journal of Natural History 51 (45-46) on page 2666, DOI: 10.1080/00222933.2017.1388859, http://zenodo.org/record/518388
Population dynamics of the bark-dwelling spider <i>Eustala perfida</i> Mello-Leitão, 1947 (Araneidae)
No full textMessas, Yuri Fanchini, Souza, Herbert Silva, Gonzaga, Marcelo O., Vasconcellos-Neto, Joao (2017): Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae). Journal of Natural History 51 (45-46): 2661-2679, DOI: 10.1080/00222933.2017.1388859, URL: http://dx.doi.org/10.1080/00222933.2017.138885
Figure 4 in Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae)
No full textFigure 4. (a) Adult male (green) and adult female (brown) of Eustala perfida on the same orb web parallel to a tree bark. Close-ups of the (b) adult male and (c) adult female. Green adult females of E. perfida and the spider's egg sac (d) in natural conditions and (e) in laboratory. Scale bars: 5 mm. Photography: Yuri Fanchini Messas.Published as part of Messas, Yuri Fanchini, Souza, Herbert Silva, Gonzaga, Marcelo O. & Vasconcellos-Neto, Joao, 2017, Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae), pp. 2661-2679 in Journal of Natural History 51 (45-46) on page 2668, DOI: 10.1080/00222933.2017.1388859, http://zenodo.org/record/518388
Figure 7 in Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae)
No full textFigure 7. Circular frequency histograms of adult females and adult males of Eustala perfida. The black vector line inside the circle indicates the mean angle or direction of the data. The transverse line on the external sector of the circle indicates the confidence interval of 95%.Published as part of Messas, Yuri Fanchini, Souza, Herbert Silva, Gonzaga, Marcelo O. & Vasconcellos-Neto, Joao, 2017, Population dynamics of the bark-dwelling spider Eustala perfida Mello-Leitão, 1947 (Araneidae), pp. 2661-2679 in Journal of Natural History 51 (45-46) on page 2671, DOI: 10.1080/00222933.2017.1388859, http://zenodo.org/record/518388
Sampling effects and measurement overlap can bias the inference of neuronal avalanches
Full text linkTo date, it is still impossible to sample the entire mammalian brain with
single-neuron precision. This forces one to either use spikes (focusing on few
neurons) or to use coarse-sampled activity (averaging over many neurons, e.g.
LFP). Naturally, the sampling technique impacts inference about collective
properties. Here, we emulate both sampling techniques on a simple spiking model
to quantify how they alter observed correlations and signatures of criticality.
We describe a general effect: when the inter-electrode distance is small,
electrodes sample overlapping regions in space, which increases the correlation
between the signals. For coarse-sampled activity, this can produce power-law
distributions even for non-critical systems. In contrast, spike recordings do
not suffer this particular bias and underlying dynamics can be identified. This
may resolve why coarse measures and spikes have produced contradicting results
in the past.Comment: 14 pages, 7 figures, Supp. Info. w/ 7 page
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
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