1,720,968 research outputs found
Biodiesel properties of Neochloris oleoabundans grown in sludge waste
Full text linkWithin the bioremediation framework, this study was aimed at finding out the optimal amount of sludge waste consumption and microalgal growth conditions of Neochloris oleoabundans in order to reach a significant fat production and chemical transformation of microalgal lipids into biodiesel. The effects of the lipid extraction methods – using ionic liquids and chloroform – on the total amount of fat, the individual fatty acid concentrations, and the biodiesel properties were assessed and compared to the EN 14214 and ASTM D6751−02 biodiesel standards. The microalgae strains grown in the optimized sludge waste medium with a dilution of 0.65 g/L wet sludge, and extracted by ionic liquid:chloroform mixed solvent, resulted being the most significant strains to obtain the highest quality of biodiesel with a density of 0.887 g cm−3, kinematic viscosity of 4.7 mm2 s−1, higher heating value of 40.21 MJ kg−1, iodine value of 107.3 g I2 100 g−1 fat, and cetane number of 50
Leonide A longitudinal trilingual corpus of young learners of Italian, German and English
Full text linkThis article presents the longitudinal trilingual corpus of young learners of Italian, German and English called LEONIDE. The corpus consists of L1, L2 and L3 learner texts. L1 texts were written in two languages of schooling (i.e. Italian and German), L2 texts in two languages learned as second languages (i.e. German and Italian), and L3 texts in an additional foreign language (i.e. English). All texts were collected from a group of lower secondary school pupils from the multilingual Italian province of South Tyrol whose development in all three languages was observed over a period of three years. Each text comes with rich metadata as well as manual and automatic annotations
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
In viaggio verso ITACA: la coerenza testuale come meta della scrittura scolastica. Proposta di una griglia di valutazione
Full text linkCoherence and cohesion are often seen as fundamental elements of learners’ textual competences, and their correct realisation is just as often required by teachers. While text linguistics has long been confronted with the constructs of coherence and cohesion and has developed convincing theoretical models, it is much rarer to see these theories transformed into easy-to-use evaluation grids. In this paper, we present the process of constructing a grid tailored to the evaluation of coherence and cohesion, as defined by the Basel Model of textuality. The production of the scale is carried out within the broader framework of the project ITACA – Coherence in Academic ITAlian, a research project devoted to the analysis of high school students' argumentative texts written in L1 Italian.
Nelle ricerche sulla didattica della scrittura scolastica, la coerenza e la coesione sono spesso indicate come elementi fondanti della competenza testuale degli apprendenti e la loro corretta realizzazione è altrettanto spesso richiesta dagli insegnanti. Se da un lato la linguistica testuale si è lungamente confrontata con i costrutti di coerenza e coesione e ha elaborato modelli teorici convincenti, dall’altro assai più rare sono le declinazioni di questi paradigmi in scale e griglie operative. In questo contributo verrà presentato il processo di costruzione di una scala di valutazione espressamente dedicata alle proprietà di coerenza e coesione, così come definite nel modello di Basilea. La costruzione della scala è portata avanti nella cornice di un più ampio progetto di ricerca, ITACA - Coerenza nell’ITAliano Accademico, volto all’analisi di testi argomentativi in italiano L1 nella scuola secondaria di II grado
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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