1,354,254 research outputs found
On the performance of a WDM ring network with multitoken interarrival time (MTIT) MAC protocol
No full text"In vitro" action of intact gamma-globulin on granulopoiesis: modulation of GM-CSA production
No full textPerformance of Label Stacking Capable MPLS Reconfigurable Networks
No full textThe label stacking mechanism of MPLS is studied in this paper. LSP encapsulation is shown to be able to reduce the MPLS control plane workload, while maintaining the data network blocking probability at acceptable levels
Screening of humoral suppression of in vitro granulopoiesis by means of serum inhibitor assay for CFU-GM
No full textApresentação da edição especial "Práticas e Objetos Semióticos"
No full textIn this issue of Papéis, we deliver to readers a set of texts by researchers from various semiotic strands of our time, who chose as the objective to analyze procedures for the construction of meanings in texts and speeches in the most diverse languages, considering both the intrinsic relationships to them as those linked to their conditions of production, thus also opening up to the approach of practices that constitute them as semiotic objects circulating in society.
Organizers:Geraldo Vicente Martins (UFMS)Eluiza Bortolotto Ghizzi (UFMS)Nesta edição da Papéis, entregamos aos leitores um conjunto de textos de pesquisadores de várias vertentes semióticas de nosso tempo, os quais elegeram como objetivo analisar procedimentos de construção dos sentidos em textos e discursos nas mais diversas linguagens, considerando-se tanto as relações intrínsecas a eles como as vinculadas a suas condições de produção, abrindo-se, assim, também para a abordagem das práticas que os constituem como objetos semióticos a circularem na sociedade.
Organizadores:Geraldo Vicente Martins (UFMS)Eluiza Bortolotto Ghizzi (UFMS
Organic acid extraction from rhizosphere soil: effect of field-moist, dried and frozen samples
No full textThis study investigates the effect of soil
treatment and storage on organic acid extraction.
For this study one clayey-loamy (Typic Udochrept) and
one sandy-loamy (Aquic Ustifluvent) soil were selected
and used to grow Lupinus albus L. plants in a climate
chamber. After 4 weeks the rhizosphere soil was
sampled and divided into five portions: (a) field moist,
no storage; (b) air-dried; (c) oven-dried, (d) field-moist
at +4°C for 8 weeks; (e) field-moist at −20°C for
8 weeks. Organic acid extraction (1:4 w/v) was carried
out for each soil portion both in water and in 10 mM
NaH2PO4. Organic acid concentration was subsequently
determined by reversed-phase high performance
liquid chromatography (HPLC). Oxalic,
fumaric, malonic and α-ketoglutaric acid were identified
in the rhizosphere of both soils but the extractable
concentration was significantly higher in the sandyloamy
soil. For both soils NaH2PO4 extracted significantly
higher organic acid concentrations than water.
Oven drying increased the extractability of organic
acids in both soils. Field moist samples (i.e. where no
storage occurred) of the sandy-loamy soil showed a
similar behaviour than −20° stored samples whereas
the one of the sandy-loamy soil were more close to the
air-dried samples. These results indicate that organic
acid extraction strongly depends on soil storage as
well as on the soil type. Sample storage seems thus to
be a crucial issue for the determination of organic
acids in rhizosphere soil and needs to be considered
prior analysis
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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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