1,721,155 research outputs found
Multiple actions of Bay K 8644 on high-threshold Ca channels in adult rat sensory neurons
No full textomega-Conotoxin (omega-CgTx, 6.4 microM) failed to fully block the high-threshold Ba currents (HVA; L,N) of adult rat sensory neurons, and showed only a minor inhibitory action on the low-voltage activated current (LVA,T). In most of the CgTx-treated neurons the residual high-threshold Ba current was strongly agonized by the 1,4-dihydropyridine Bay K 8644. 1 microM Bay K 8644 enhanced 3- to 4-fold the size of this current at low membrane potentials and prolonged its deactivation kinetics by one order of magnitude. As in cardiac cells, in some neurons Bay K 8644 sped up about 3-fold the inactivation time course of the omega-CgTx-resistant Ba current, suggesting multiple actions of the dihydropyridine on neuronal high-threshold Ca channels
Design e salute
No full textIl testo presenta una metodologia per intervenire con tecniche di design a tutto campo negli ambienti ospedalieri e in genere della sanità, allo scopo di modificare l'impatto emozionale degli ambienti stessi, ed aumentarne l'efficacia. Un'ampia ed esausrtiva classificazione delle tipologie d'intervento è fornita, così come pure un'adeguata esemplificazione
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
Action of Ca2+ agonists/antagonists in mammalian peripheral neurons
No full textThe action of several ligands on the low- (LVA,T) and high-threshold (HVA,L and N) Ca channels of adult rat sensory neurons and human neuroblastoma IMR32 cells has been investigated. In both cell types, 40 microM Cd2+ and 6.4 microM /omega-Conotoxin (omega-CgTx) selectively blocked the HVA channels, sparing the majority of LVA channels that were antagonized by amiloride and Ni2+. In 50% of the cells, however, /omega-CgTx spared also a 15% of HVA channels that proved to be sensitive to BAY K 8644. The agonistic action of BAY K 8644 on [omega-CgTx-resistant HVA channels caused a large Ba current increase, prolonged current deactivation and acceleration of HVA channels inactivation that was particularly evident in adult rat DRG
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
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