1,720,963 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
Caratteristiche chimico-fisiche e nutrizionali di cultivar di ciliegio nel vignolese
No full textLe ciliegie (Prunus Avium L.) sono frutti apprezzati dai consumatori per la precocità e le eccellenti qualità nutrizionali ed organolettiche. In questo lavoro sono state studiate le sostanze fenoliche e l’attività antiossidante di campioni provenienti da coltivazioni biologiche e convenzionali, raccolti nel corso di cinque successive stagioni produttive. I risultati sono concordi con la letteratura esistente e l’alta variabilità dimostra il peso dell’andamento stagionale sulle qualità dei frutti. I risultati confermano l’ottima qualità funzionale delle ciliegie, in particolare della cultivar Moretta, che si propone come un ottimo prodotto per il mantenimento del buono stato di salute dei consumatori
Caratterizzazione nutrizionale e funzionale di cultivar di ciliegia
No full textLavoro pubblicato nel volume stampato in occasione del VII Festa Nazionale dell'Associazione Nazionale citta delle Ciliegi
Caratterizzazione funzionale di cultivar di ciliegia.
No full textLe ciliegie (Prunus Avium L.) sono frutti apprezzati dai consumatori per la loro precocità e le eccellenti qualità nutrizionali ed organolettiche. In Emilia Romagna ed anche a livello nazionale ed internazionale è da tempo apprezzato il marchio “Ciliegia di Vignola”, che è attribuito alle ciliegie coltivate nel comune di Vignola e nelle zone limitrofe. Tra le cultivar presenti in zona di particolare importanza sono le tradizionali, Anella, Nero I, Nero II, Moretta, Della Marca. La nostra regione è all’avanguardia nella coltivazione biologica: conta più di 4000 operatori ed oltre l’8% della superficie coltivata. La caratterizzazione chimico fisica e la ricerca di particolari componenti delle ciliegie sono state oggetto di studio anche nel recente passato. Per queste ragioni abbiamo ritenuto interessante studiare alcuni parametri nutrizionali e funzionali di ciliegie provenienti da coltivazioni biologiche e convenzionali della zona di produzione tipica
Variations 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
Valore funzionale di ciliegie da varie cultivar
No full textSweet cherries (Prunus Avium L.) are highly appreciated fruits for their excellent nutritional and functional values, and the “Ciliegia di Vignola” trademark is well known in region Emilia Romagna as well as in Italy. Between the various cultivars grown in the area, traditional ones such as Anellone, Nero I, Nero II and Moretta are the most important. The chemo-physical characterization of sweet cherries and the research of component of particular interest has been carried out by others authors in the recent past. For these reason we have decided to study some functional properties of sweet cherries coming from the Vignola area. Samples belonging to nine different cultivars, grown in an experimental camp, were harvested during years 2006-2010 at commercial ripening. For each cultivar samples grown with both organic (O) and conventional (C) farming were harvested. Total phenolic substance, total anthocyanins, Fe2+ chelating activity, antioxidant and reducing power were determined in each sample. The extracts were obtained using acidified methanol from 20g of exactly weighted of edible matter. Total phenolic determination has been carried out using the Folin-Ciocalteu method and expressed as mg of gallic acid per 100g of edible matter. Total anthocyanins determination has been carried out using the colorimetric pH differential method, measuring the absorbance at 510 nm at pH 1 and 4.5. The difference between measured absorbance is proportional to the anthocyanins content, expressed as mg of cyanidine per 100g of edible matter. Antioxidant power has been evaluated measuring the inhibition of a constant quantity of a stable radical (DPPH, 2,2-diphenyl-1-picrylhydrazyl), expressed as trolox μeq per g. Reducing power and Fe2+ chelating activity are two useful properties for the evaluation of antioxidant properties: the former has been measured using Oyaizu method, while the latter has been evaluated using Dinis method. For these determination, measured absorbance of a standardized volume of sample has been used as an activity index. Results obtained with these analysis are generally in agreement with those reported in literature. In some cases standard deviation is considerably high: this is due to the difference in the climatic condition during the ripening process in the considered years. There are no significant differences between samples grown with conventional and organic farming, thus confirming that the organic approach can produce fruits with the same functional properties than the conventional one. The most interesting cultivar, because of its high phenolic contents and superior antioxidant activity, is certainly Moretta. The cultivar Nero II also shows interesting functional properties, while cultivar Sweetheart is characterized by the lowest measured values. Reported results confirm the good functional properties of sweet cherries in general and of Moretta cultivar in particular. It is therefore possible to say that the consumption of those fruits in a balanced diet can have a positive effect on the health of the consumer
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
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