1,721,146 research outputs found
The tyrosine kinase Abl is a component of macrophage podosomes and is required for podosome formation and function.
No full textMyeloid leukocytes form actin-based plasma membrane protrusions, called podosomes, that are implicated in myeloid cell recruitment into tissues and cell migration within the interstitium. In this study we show that tyrosine kinases of the Abl family are present in podosomes formed by murine and human macrophages. Silencing of Abl expression in bone-marrow-derived macrophages and monocyte-derived macrophages by siRNA or Abl enzymatic inhibition with imatinib resulted in the disassembly of macrophage podosomes and the reduction of their capacity to degrade an extracellular matrix and migrate through matrigel matrices and endothelial cell monolayers. Additionally, macrophages deficient in Src-family kinases, which cross-talk with Abl in regulating macrophage migration, also demonstrated podosome disassembly. These findings suggest that podosome disassembly induced by Abl targeting may inhibit podosome-dependent functions such as leukocyte recruitment into inflammatory sites and osteoclast-dependent bone resorption
Clobazam plasma concentrations: pharmacokinetic study in healthy volunteers and data in epileptic patients
No full textQuantitative determination of clobazam in the plasma of epileptic patients by gas-liquid chromatography with electron-capture detection
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Severe dysautonomic onset of Guillain-Barré syndrome with good recovery. A clinical and autonomic follow-up study
No full textA 39 year old man with acute panautonomic and mild somatic neuropathy had severe postural hypotension 1 week after onset. Porphyric neuropathy was excluded. The final diagnosis was Guillain-Barré syndrome (GBS). After 2 months he began to recover progressively and after 9 months he presented asymptomatic postural hypotension. We consider the hypothesis of a spectrum of clinico-pathological entities at one end of which lies GBS with autonomic signs and at the other acute pure dysautonomia. The site of the autonomic lesion, might have been in post-ganglionic sympathetic fibers and vagus nerve. © 1990 Masson Italia periodici s.r.l
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
Computational Investigation of the Thermal Performance of Liquid-cooled Heat Sinks for Power Electronics
No full textDispelling 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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