1,720,956 research outputs found
Mechanical thinner of apricot fruitlet
No full textThe aim of this study is to test this new thinner machine on apricots fruitlets, identifying the suitable working speed that best combine the most thinning effect in absence of visible damage of the branches and the remaining fruits.
The machine is composed by a rotor equipped with radial rods on a central axe mounted in a rear tree point linkage of a tractor. Trials were carried out in March-May 2016 in an apricot orchard sited in Cesena (FC). The experimental was designed to compared mechanical thinning at different working speed (1.11 and 0.83 m/s) and hand thinning on green fruits (2 ≤ Ø ≤ 2.5 cm). The thinning effect was evaluated counting fruits remained from 40 branches randomized choice in upper and down part of four plants replicates. After the mechanical thinning, it was performed a manual thinning of finishing, aimed to eliminate the fruits too close together on the branch and, in general, ensure a uniform fruit set on the tree. Time required for thinning was measured in the trees mechanical thinned and compared with those one thinned only Handily (control).
The two different working speeds gave two different thinning intensity: at 0.83 m/s fallen fruits were the 44 % of the total while at 1.11 m/s the 47 %. The thinning effects depends on branches length and at 1.11 m/s in branches of length over 35 cm was recorded the highest fruit reduction (50.3 %) and the lowest (44.4 %) in branches of length of less than 15 cm. Different were the results obtains in the thesis at 0.83 m/s in fact the percentage of fruit reduction was included between the 47.5 % of branch with a length greater than 35 cm and the 41.3 % of branches with a length of less 15 cm.
Mechanical thinning can produce a net economic impact on apricot cultivation and in some cases, can replace the manual thinning and reduce considerable the labor costs
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
Caratteri qualitativi dei frutti di 13 varietà di fragola in funzione del genotipo e del materiale di propagazione
Full text linkQualita di nuove accessioni di fragola (fragaria x ananassa) in funzione del tipo di materiale di propagazione: Aspetti analitici e sensoriali
No full textLa ricerca è stata svolta presso il Consiglio per la Ricerca e la Sperimentazione in Agricoltura - Unità di Ricerca per la Frutticoltura di Forlì (CRA-FRF) ed ha riguardato lo studio delle caratteristiche qualitative e di alcuni composti bioattivi dei frutti di 10 diverse accessioni varietali di fragola (6 varietà: Alba, Nora, Garda, Jonica, Brilla, Pircinque; 4 selezioni in avanzata fase di studio ottenute nell’ambito dei programmi di breeding pubblico-privati condotti e coordinati dal CRA-FRF: CE 51, CE 56, VR 177.2, VR 4) coltivate per un biennio nello stesso ambiente (cesenate). Sono state considerate due differenti tipologie di piante: frigoconservata (tipologia tradizionale) e fresca “cima radicata” (tipologia innovativa che si sta sempre più affermando presso i produttori).
L’obiettivo principale di questa tesi è finalizzato alla caratterizzazione qualitativa e nutrizionale dei frutti raccolti dalle due tipologie di pianta. L’interesse di monitorare l’effetto di questa innovativa tecnica di coltivazione deriva dalla sua sempre maggiore affermazione in quanto consente una significativa riduzione dei costi di produzione. Lo studio delle 10 accessioni di fragola (tra cui quelle che attualmente stanno dominando lo standard varietale del Nord Italia) può permettere di aggiungere informazioni importanti sulla loro caratterizzazione qualitativa, in particolare sulle caratteristiche sensoriali mediante un approccio quantitativo descrittivo. Infine, la ripetizione dello studio per due annate differenti può consentire di valutare l’influenza del fattore “anno” sui caratteri studiati
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
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