1,720,994 research outputs found
Driver Assistance System for Trams: Smart Tram in Smart Cities
No full textMobility in smart cities is also becoming smart, promoting on the one hand transport modes based on zero emission electrical technologies and on the other providing vehicles with technological solutions that support the drivers in driving operations. In the cities, more and more cars today are equipped with autonomous driving systems, based on Sensor Fusion Perception platforms, which aim to improve road safety and reduce accidents, to halve accident deaths in the shortest possible time. On the other hand, the sustainability objectives also shift to increasingly intense use of public transport with zero emissions, such as that offered by trams. Trams, unlike the other rail transport systems, use the same road infrastructure as cars, motorbikes, bikes, and pedestrians and will soon find themselves interacting with vehicles with increasingly higher autonomous driving levels. It is clear, therefore, that even for trams, the time is ripe to accommodate driving support systems. In this document, an overview is provided of the potential for the diffusion of advanced driver assistance systems by the automotive sector, in order to then evaluate their porting to trams, with the ultimate goal of increasing their level of safety and automation
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
CFTR expression during cellular senescence
No full textBackground: Cystic fibrosis trans-membrane conductance regulator (CFTR) is a cAMP-modulated chloride/bicarbonate channel with different functions in various organs and tissues. CFTR expression get decreasing from embryogenesis to adult/elder age and recent evidences show that some CFTR-regulating microRNAs, i.e, miR-494, is up-regulated during cellular senescence. Cellular senescence is a permanent cell cycle arrest that can be induced in young cells by different stimuli such as the physiological shortening of telomeres, the activation of oncogenes as well as oxidative stress.
Aims: To assess whether and how CFTR might be involved in cellular senescence.
Methods: To induce premature senescence, IMR90 young cells (PDL34) were treated with 100 M diethylmaleate (DEM) for ten days. The over-expression and the silencing of CFTR in pre-senescent IMR90 cells and young IMR90 cells, respectively, were performed by lentiviral cell infection and cell counting. The CFTR and the microRNAs expression were assessed by Western Blot and RT-PCR analysis either in: i) IMR90 cells at different population doubling levels (PDL); ii) IMR90 cells at different days after DEM treatment.
Results: We found that: a) the CFTR expression significantly decreased in IMR90 cells during replicative senescence and after DEM treatment in an inverse relationship with miR-494 expression; c) the over-expression of CFTR in IMR90 pre-senescent cells significantly accelerate cellular senescence, while, the silencing of CFTR significantly slowed the appearance of the senescent phenotype.
Conclusions: Our preliminary data show that CFTR is physiologically down-regulated during cellular senescence and this may (at least partially) depend on the up-regulation of miR-494. The over-expression and the silencing of CFTR in IMR90 cells have important effects on their cell cycle. Furthermore, we are now validating such results on primary epithelial nasal cells from different subjects
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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