1,721,268 research outputs found
Estimation of mobility direction of a people flux by using a live 3G radio access network and smartphones in non-connected mode
No full textA new methodology to statistically analyze the flux mobility of people in a city is described. Cellular phones are exploited to collect statistical information about the radio base station (RBS) cells of the Telecom Italia 3G radio access network (UTRAN), which they use to camp on. Finally, big data (BD) elaboration allows statistical analysis of all active phones, showing the main mobility directions of people within a city. Such topological information is useful in the concept of smart city, where the ability to locate peak or daily flux of people can be utilized by public institutions or private entities, to be aware of polluted areas and thus reduce congestion of urban areas and viability zones. It is worth to remark that it's not necessary to monitor the whole network and all users with continuity. The monitoring is needed to extract data just for the minimum time required to have a statistical significance. The focus is not on the single user's behavior, but rather on the massive flux of people
Sequestering agents of intermediate reactive aldehydes as inhibitors of advanced lipoxidation end-products (ALEs)
No full text
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
Proteomic analysis of Populus×euramericana (clone I-214) roots to identify key factors involved in zinc stress response
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
The expression of the tomato prosystemin in tobacco induces alterations irrespective of its functional domain
Full text linkSystemin is a tomato peptide hormone that
promotes plant defense against plant-chewing pests. This
octadecapeptide is released from the C-terminal region of
prosystemin, a 200 amino acid-long cytosolic precursor.
Homologues of the tomato prosystemin are present in other
Solanaceae but not in tobacco. This species does not respond
to the exogenous application of the tomato systemin. Previously,
it was shown that the expression of the full-length
tomato prosystemin cDNA in tobacco affects the proteomic
repertoire and increases plant tolerance against phytopathogenic
fungi. In this work, to evaluate the relevance of
the systemin sequence, we generated transgenic tobacco
plants that express a mutated prosystemin lacking the systemin
region. By using proteomics and gene expression
analyses, we show that the constitutive expression of the
truncated prosystemin altered the proteomic profile of
tobacco leaves and increased plant resistance against B.
cinerea. The overlap of the modifications caused by the
expression of the full-length and the truncated prosystemin
indicated that these alterations occur also in the absence of
the systemin sequence. Although the cellular mechanisms of
prosystemin cleavage are elusive, our work demonstrates
that the expression of a heterologous cytosolic peptidehormone
precursor, irrespective of the presence of its peptide
domain, associated with unpredicted changes at the
proteomic and transcriptional level
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