1,721,079 research outputs found
Towards the exhaustive verification of real-time aspects in controller implementation
No full textIn industrial applications, the number of final products endowed with real-time automatic control systems that manage safety-critical situations has dramatically increased. Thus, it is of growing importance that the control system design flow encompasses also its translation into software code and its embedding into a hardware and software network. In this paper, a tool-supported approach to the formal analysis of real-time aspects in controller implementation is proposed. The analysis can ensure that some desired properties of the control loop are preserved in its implementation on a distributed architecture. Moreover, the tool provides as output information which can be used to approach straightforwardly some design problems, such as hardware sizing in the final implementation
Torque/volume increase in Permanent Magnet Synchronous Motors by fill factor enhancement
No full textThis article focuses on the maximization of the obtainable Torque-per-volume ratio, mainly through the improvement of the obtainable winding filling factor. While there are many possible approaches to the problem, from the industry point of view, the ideal candidate would be the one offering good performance, easy manufacturability and low cost
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
Differential involvement of protein kinase C alpha and epsilon in the regulated secretion of soluble amyloid precursor protein
No full textWe investigated the differential role of protein kinase C
(PKC) isoforms in the regulated proteolytic release of
soluble amyloid precursor protein (sAPPa) in SH-SY5Y
neuroblastoma cells. We used cells stably transfected with
cDNAs encoding either PKCa or PKCe in the antisense
orientation, producing a reduction of the expression of
PKCa and PKCe, respectively. Reduced expression of
PKCa and/or PKCe did not modify the response of the
kinase to phorbol ester stimulation, demonstrating translocation
of the respective isoforms from the cytosolic fraction
to specific intracellular compartments with an interesting
differential localization of PKCa to the plasma membrane and PKCe to Golgi-like structures. Reduced expression of
PKCa significantly impaired the secretion of sAPPa induced
by treatment with phorbol esters. Treatment of PKCadeficient
cells with carbachol induced a significant release of
sAPPa. These results suggest that the involvement of PKCa
in carbachol-induced sAPPa release is negligible. The
response to carbachol is instead completely blocked in
PKCe-deficient cells suggesting the importance of PKCe in
coupling cholinergic receptors with APP metabolism
An Induction Motor Flux and Speed Observer: Performances Evaluation at Several Power Levels
No full text"eosFit-Pinc: A simple GUI for host-inclusion elastic thermobarometry" - Reply to Zhong et al
Full text linkWe provide a further algebraic proof that the lines of entrapment conditions for inclusions calculated with the formula of Guiraud and Powell (2006) are not thermodynamic isomekes and therefore do not represent exactly lines of possible entrapment conditions
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