1,721,005 research outputs found
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
Effect of postharvest treatments on physiological disorders of ‘Galant’: a new scab resistant apple cultivar
No full textThe present work focuses on the promising scab resistant apple cultivar ‘Galant’ (Lumaga A 913) which shows great interest as a suitable cultivar for organic production but little is known about its postharvest storage. Experiments performed by the Fondazione Edmund Mach (FEM) from 2015 to 2017 show a complex of different physiological disorders affecting this apple: superficial scald, flesh browning, browning of the skin and underlying flesh (soft scald and soggy breakdown). Here, we present the results of different postharvest treatments applied in order to avoid fruit injury, including initial low oxygen stress conditions (ILOS) and 1-methylcyclopropene (1-MCP) application. Superficial scald symptoms commonly appeared on less mature fruits but the production of α-farnesene and its volatile oxidation products which are involved in the process are inhibited by using ILOS technology which kept the disorder under 4% disease incidence in comparison with controlled atmosphere (CA) with 35% after 180 d storage and 15 d shelf life. On the other hand, both ILOS and CA storage do not affect the incidence of internal browning and the incidence rates were always >60% after 14 d shelf-life. Based on the flesh browning disorders, the storability of ‘Galant’ was always limited to <180 d. The incidence of superficial scald and flesh browning were similar in both 1-MCP treated and untreated apple
La maturazione delle mele: i processi che la caratterizzano e le metodiche di monitoraggio
No full textEffect of postharvest treatments on physiological disorders of `Galant ́: a new scab resistant apple cultivar
No full textTraditional varieties are still in demand, but growers are weeding them out in favor of varieties which they say taste better, have crunchier texture and sell for a higher price. The success of new varieties will depend on it distinctiveness, consistence of quality and the efforts of those growing, packing and marketing it. New varieties offer enhanced quality often coupled with unique attributes but there are still many aspects that need to be investigated. Generally, apple are stored many months at low temperature under controlled atmosphere (CA) in order to reduce the metabolic rate. The storability of several new introduced varieties is, however, limited by physiological disorders occurring naturally during storage which seem to cause the main postharvest fruit losses. Here we focused on the promising apple scab resistant cultivar Galant (Lumaga A 913) developed in Switzerland as a cross between Resi and Delbar Jubilèe. Galant shows great interest as an alternative cultivar for organic production as well as good tree growth habitat, productivity and excellent taste. However, little is known about its storage features. Preliminary experiments by Neuwald et al. (2014) showed Galant softens quickly with the development of internal browning in the period between January and May. Therefore, it has a limited postharvest storage life. In our trials performed from 2015 to 2019, a complex of different physiological disorders were observed: superficial scald, flesh browning and browning of the skin and underlying flesh (soft scald & soggy breakdown). Here, we present the results of different postharvest treatments applied in order to avoid fruit injury, including ultra low oxygen atmosphere conditions (ULO), 1-methylcyclopropene (1-MCP) application and management of storage temperature. Superficial scald increases on early stages of maturity but the reduction of the respiratory metabolism by using ULO allows to keep it under a certain level (4%) in comparison with CA (35%) after 200 days storage. On the other hand, both ULO and CA storage do not affect the incidence of internal browning and the incidence rates is always higher than 80 %. Based on flesh browning disorders, the storability of Galant is always limited to 120 days. Regarding 1-MCP treatment, it inhibits ethylene production but may induce stress-like conditions and also increase polyphenol oxidase activity, which is the main enzyme responsible for browning reactions. Nevertheless, the superficial scald and flesh browning incidence were similar in both 1-MCP treated and untreated apples. Furthermore, the relationship of soft scald incidence caused by chilling injury and special post-harvest treatment - such as delayed cooling and/or storage temperatures - was examined in a short term storage
Mele Red Delicious: la qualità dipende dalla conservazione
No full textDalla prova svolta su mele raccolte a Mezzolombardo nel 2018 si evidenzia che la combinazione dell’impiego di gas 1-Metilciclopropene (1-MCP) sulle mele raccolte e la DCA (Dynamic Controlled Atmosphere) in cella di conservazione consente di attendere qualche giorno in più nella raccolta, con importanti benefici in termini di qualità, senza compromettere la conservabilità del prodotto, e inoltre consente un allungamento della vita del prodotto, riducendo in modo evidente la presenza di riscaldo a fine conservazion
Ciliegie, la qualità passa da una raccolta tempestiva
No full textColore, peso, zuccheri, acidità e soprattutto durezza danno precise indicazioni agli agricoltori sulle tempistich
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