1,720,959 research outputs found
Glass Microspheres Covering Film: Agronomic Evaluations on the Production of Cut Flowers
No full textA trial was carried out to evaluate, in the north-centre of Italy, the behaviour
of a new plastic covering film able to scatter light (‘diffract light’), prepared with the
inclusion of empty glass microspheres (“Solex”). The new film was compared to a
covering ‘diffused light’ film (“Agrilux”). Both films had a co-extruded three layers
structure, with the same content of Vinyl acetate. They were tested in two different
conditions (cold tunnel and air conditioned greenhouse), working on two species of
cut flowers, Limonium (Limonium sinuatum Mill.) and three cultivars of carnation
(Dianthus caryophyllus L.). Moreover, the development of some physical and
mechanical characteristics of plastic films were checked. Since the first results, the
innovative film showed a better behaviour than the control one. It presented ‘light’
and ‘thermal’ conditions (lower temperature during the day and slightly higher
temperature in the night, compared to the control film) that allowed a better growth
and yield respect to the control. In fact, Limonium grown under the glass
microspheres film showed higher yield and better commercial quality (stem length).
The analysis of cumulative production in carnation showed different results among
cultivar. For cv ‘Luisa’ and ‘Dandy’, the positive effects of glass microspheres film
were more evident during autumn and winter, while in cv ‘Michelle’, those effects
were higher during warm seasons (October, April, May and June). This could be
explained with the fact that the glass microspheres film provides environmental
conditions that avoid some of the stresses plants undergo during some stages of their cycl
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
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
Influenza di film plastici a diversa trasmittanza UV sulla qualità di frutti di pomodoro
No full textLa radiazione UV influenza molteplici aspetti del metabolismo vegetale,
inducendo, tra l’altro, la produzione di composti importanti sia per la
protezione della pianta che per il benessere e la salute umana. L’impiego
di film di copertura con buona trasmittanza alla radiazione UV potrebbe
garantire la produzione di ortofrutta arricchita in tali composti. L’influenza
di diversi film di copertura sul contenuto di composti fenolici, flavonoidi
e carotenoidi è stata valutata in frutti di pomodoro di due cv commerciali
(Solanum lycopersicum L, cv Optima e cv Caramba). I frutti maturati in
presenza della radiazione UV hanno mostrato un arricchimento in fenoli
e flavonoidi, con conseguente aumento dell’attività antiossidante, e un
trend opposto per i carotenoidi. La sperimentazione ha inoltre evidenziato
una sostanziale invarianza tra i frutti maturati nei tunnel installati l’anno
precedente, a suggerire una riduzione della capacità di schermatura UV nel
corso delle due stagioni.UV radiation influences many aspects of plant metabolism, inducing, for
example, the production of protective compounds important for plants as well
as welfare and human health. The use of cover film with good transmittance
to UV radiation could allow the production of fruit and vegetables enriched
in these compounds. The influence of different cover films on the content of
phenolic compounds, flavonoids and carotenoids was tested in tomato fruits
of two commercial cv (Solanum lycopersicum L, cv and cv Optima Caramba).
Fruits ripened in the presence of UV radiation showed an enrichment in
phenols and flavonoids, with consequent increase of the antioxidant activity,
and an opposite trend for the carotenoids. The research also showed virtually
no change between fruits ripened in the tunnels installed the year before
the trial, suggesting a reduction in the ability of shielding UV during the two
seasons
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