1,720,997 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
TILLING BY SEQUENCING TO IDENTIFY INDUCED MUTATIONS IN SUNFLOWER (HELIANTHUS ANNUUS L.) GENES
Get PDFVariations on the Author
Get PDF“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
Get PDFWe 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
Development and application of protocols to certify the authenticity and traceability of Apulian typical products in olive sector
No full textMethods to trace food through the different stages of production, processing and distribution, play a key role in assuring food safety and in protecting product authenticity. Biotechnologies provide innovative tools useful for these purposes. Among the Italian regions, Apulia has the highest number of typicality brands in the olive sector, with five PDO (Protected Designation of Origin) extra virgin olive oils and one PDO table olive. In this article, authors review the studies on molecular and metabolic tracking of PDO products in the Apulian olive sector, with particular focus on the "Terra di Bari", "Collina di Brindisi" and "Terra d'Otranto" PDO olive oils and the "Bella di Cerignola" PDO table olive
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Novel foods in the European framework: benefits and risks
Get PDFGiven the rapidly increasing global demand for food, it is mandatory to consider new sources of
nutrients, safe and sustainably produced protein foods to complement the current traditional and
limited sources of protein in the human diet. In recent years, a wide range of nontraditional protein
foods have been explored, prompting the European Union to legislate on how novel foods can be
introduced and traded on the European market to ensure their safety. This review will illustrate the
range of novel foods authorized in the EU and their potential impact on human health, highlighting
the gaps, the potential risks, and the future research opportunities and perspectives
A DNA methylation survey of NCED gene in Vitis vinifera, under stress conditions.
No full textThe phytohormone abscisic acid (ABA) regulates many key processes in
plants, such as seed germination, seedling growth, and abiotic stress tolerance. In
particular, drought stress signals are transmitted through at least two pathways: one
is abscissic acid (ABA)-dependent, and the other is ABA-independent. In the ABAdependent
pathway, drought stress increases the cellular ABA levels, which induce
the expression of drought stress-responsive genes, such as 9-cis-epoxycarotenoid
dioxygenase (NCED). The stress memory can be stored in the short-term, depending
on the half-life of stress-induced proteins, RNAs, and metabolites, or for the longterm,
by reprogramming phenology and morphology. DNA methylation and histone
modification are stable and heritable epigenetic processes involved in long-term
stress memory. Recent discoveries reveal that, in addition to genetic regulation,
epigenetic regulation plays a key role in ABA-mediated plant processes. Our interest
is on studying the methylation status of NCED genes as candidate genes under
normal and drought-stressed conditions in the framework of “epigenetic memory”
in Vitis vinifera. We have identified symmetric and asymmetric CpG islands in the
full sequences of genes which carry on DNA methylation by bisulfite analysis. These
results will be considered along with the expression patterns of stress-induced genes
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