1,720,982 research outputs found
Surfaces close to the Severi lines
No full textLet X be a surface of general type with maximal Albanese dimension: if (Formula presented.), one has (Formula presented.). We give a complete classification of surfaces for which equality holds for (Formula presented.) : these are surfaces whose canonical model is a double cover of a product elliptic surface branched over an ample divisor with at most negligible singularities which intersects the elliptic fibre twice. We also prove, in the same hypothesis, that a surface X with (Formula presented.) satisfies (Formula presented.) and we give a characterization of surfaces for which the equality holds. These are surfaces whose canonical model is a double cover of an isotrivial smooth elliptic surface branched over an ample divisor with at most negligible singularities whose intersection with the elliptic fibre is 4
Use of flavorings to improve the palatability of aquafeeds used in aquaculture: a multidisciplinary approach to better understand teleost physiological responses
No full textIl settore mangimistico dell'acquacoltura si trova ad affrontare problematiche di sostenibilità ed efficienza a causa della dipendenza da fonti proteiche tradizionali e della limitata appetibilità di ingredienti alternativi. Quest'ultimo aspetto comporta una ridotta assunzione di mangime da parte dei pesci, una crescita non ottimale, perdite finanziarie e impatto ambientale. Inoltre, i feed attractants convenzionali, presentano problemi di sostenibilità e variabilità nell'efficacia. Pertanto, gli aromi sintetici, largamente impiegati nell'industria alimentare, offrono un'alternativa promettente grazie alla loro riproducibilità, sicurezza ed ecosostenibilità. La presente tesi di dottorato esplora il potenziale degli aromi sintetici liquidi come feed attractants per le specie di acquacoltura. Utilizzando un approccio multidisciplinare, sono stati condotti esperimenti su zebrafish (Danio rerio), spigola (Dicentrarchus labrax) e orata (Sparus aurata), valutando gli effetti degli aromi sulle risposte fisiologiche generali dei pesci. In particolare, sono stati testati diversi aromi sintetici (formaggio, caramello e cocco) e il loro solvente (glicole propilenico) nelle diverse fasi del ciclo vitale, con le prove iniziali su zebrafish che hanno fornito informazioni utili per le successive indagini relative a specie di interesse commerciale. I risultati ottenuti hanno evidenziato il potenziale degli aromi attrattivi formaggio e caramello come efficaci feed attractants sia in zebrafish che in spigola. Inoltre, il processo di incorporazione all'interno del mangime è stato ottimizzato attraverso un processo di microincapsulamento degli aromi, che ne ha migliorato la stabilità e il rilascio in acqua. La prova finale, condotta in condizioni simili a quelle di un allevamento intensivo, ha dimostrato la versatilità di questo approccio in contesti di acquacoltura commerciale. Questa ricerca fornisce un quadro innovativo per l'integrazione degli aromi sintetici nei mangimi per acquacoltura, affrontando i problemi di appetibilità, promuovendo al contempo la sostenibilità e la redditività economica dell'acquacoltura.The aquafeed industry faces sustainability and efficiency challenges due to its reliance on traditional protein sources and the limited palatability of alternative ingredients. This latter aspect leads to reduced fish feed intake, suboptimal growth, financial losses, and environmental degradation. In addition, natural feed attractants present both sustainability issues and variability in effectiveness. In light of this, synthetic flavors, widely used in the food industry, offer a promising alternative due to their reproducibility, safety, and cost-effectiveness. The present PhD thesis explores the potential of liquid synthetic flavors as feed attractants for aquaculture species. Using a multidisciplinary approach, experiments were conducted on zebrafish (Danio rerio), European seabass (Dicentrarchus labrax), and Gilthead sea bream (Sparus aurata), assessing the flavors' effects on fish overall physiological responses. Different synthetic flavors (cheese, caramel, and coconut) and their solvent (propylene glycol) were tested across life stages, with initial trials on zebrafish providing insights for subsequent investigations on commercially relevant species. The results obtained highlighted the potential of cheese and caramel flavors as effective feed attractants in both zebrafish and seabass. In addition, the incorporation process within the feed was implemented through a flavor’s microencapsulation process, which improved their stability and release in water. The final trial, conducted under farm-like conditions on Gilthead sea bream, demonstrated the practicality of this approach in commercial aquaculture settings. This research provides a novel framework for integrating synthetic flavors into aquafeeds, addressing palatability issues while promoting sustainability and economic viability in aquaculture
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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