1,721,066 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
ENVIRONMENTAL IMPACTS OF COMMUNITARY CROPS OF SWEET QUINOA (CHENOPODIUM QUINOA WILLD. VAR. TUKAHUAN) AT ANDEAN REGION IN ECUADOR
Full text linkQuinoa (Chenopodium Quinoa) is a trendsetter crop as it is a great source of vitamins, proteins and minerals and it is a gluten-free pseudocereal. Agriculture is a sector that contributes to climate change through greenhouse gas emissions. In Ecuador, agriculture contributed to 18.03% of emissions. The purpose of this research was to determine the Life Cycle Analysis (LCA) of communitarian systems that produce Sweet Quinoa in Ecuador. It was carried out by an inventory of the LCA. The data collected were through interviews and surveys, chemical analysis of soil samples, plant structure and manure applied. A bag of 25 kg of Quinoa has been selected as a functional unit. Impact indicators were defined as Quinoa yield per single environmental impact index, including GWP, aquatic eutrophication potential and aquatic ecotoxicology. The results indicate that a Quinoa yield obtained by a suitable application of manure is lower or equal to Wheat. The mitigation of aquatic eutrophication caused by the excessive use of N-fertilizer is an important factor in improving the eco-efficiency of the Quinoa productive chain. The importance of the LCA of an agro-product lies in knowing and reducing different environmental impacts and encouraging sustainable production
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
Stripping of dissolved oxygen from extra virgin olive oil: Effects on oxidation and biophenols
No full textVertical centrifugation is used in virgin olive oil production to remove residual suspended solids and water from the oil, after horizontal centrifugation. Although this process has clear benefits in terms of productivity, it degrades the olive oil. In particular, vertical centrifugation allows oxygen to dissolve into the olive oil. This decreases the antioxidant content and increases oxidation-related parameters in the oils. These negative effects can be partially prevented with the quick removal of oxygen, for example, by the nitrogen stripping technique. This study tests the effect of nitrogen stripping on two mono-cultivar olive oils (Arbequina and Coratina). The effects are evaluated immediately post-production and after 6 months of storage. Nitrogen stripping improved the peroxide value, K232 parameter, and tocopherol and biophenol content. Furthermore, it was found to prevent depletion of secoiridoids and reduce oxidation, measured as a ratio of the oxidized and non-oxidized forms of secoiridoids. Practical applications: The tested technology could be introduced in line with vertical centrifugation, in order to keep the productivity benefits provided by the centrifugation, but limit the negative effects in term of quality. Thus, the removal of dissolved oxygen with the nitrogen stripping technique could improve olive oil quality
The bread making process of ancient wheat: A semi-structured interview to bakers
No full textThe importance of bread made from ancient wheat flours is currently increasing. In literature, several works examine the cultivation phase of ancient wheats, as well as their positive effects on human health. On a technological level, their bread-making process is hindered by the poor workability of these flours, but there are only few scientific studies aimed to enhance their technological performance. However, bakers developed several strategies to improve ancient wheat flour processability. We chose the semi-structured interview as instrument to investigate these strategies, evaluating them according to the existent literature. The study revealed that ancient wheats are usually stone milled, and processed as brown flours. Bread doughs are often prepared with flour blends, resulting from the cultivation of grain mixtures or obtained as flour mix. The choice of slow mixers, an accurate monitoring of the final leavening phase and the use of sourdough, as well as the selection of flour blends have been proposed as solutions to partially improve the technological performance of ancient wheat flours. Finally, ancient wheat varieties are usually processed following several “good working practices” (i.e. use of non-refined flours, sourdough, organic cultivations) which probably play a role in enhancing their beneficial effects on human health
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
Metodo e apparato per diraspatura e frazionamento qualitativo degli acini da uva raccolta a mano.
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