1,721,176 research outputs found
La gomma arabica in Sudan. Il declino di un tradizionale prodotto agricolo
No full textIl Sudan è stato e resta il maggior paese del mondo produttore ed esportatore di gomma arabica della migliore qualità. Si stima che circa 5 milioni di persone in Sudan partecipino a vario titolo alla attività di incisione degli alberi e di raccolta della gomma.
Sono state compiute varie indagini negli anni 2000 e 2001. Queste hanno riguardato la potenzialità produttiva da parte degli agricoltori e sulle loro aspettative di remunerazione, dall'altro sulle politiche attuate dalla Gum Arabic Processing Company, holding della compagnia di bandiera.
La conclusione fa intravedere che le Regolamentazioni in atto per collocarsi adeguatamente sul mercato internazionale, stanno creando interessanti presupposti per avviare una nuova stagione che si prospetta capace di accendere nuovi entusiami per i milioni di piccoli produttori di gomma arabica che vedono nella produzione di tale bene, una rilevante integrazione economica per molti mesi dell'anno
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
Beyond precision and recall: Understanding uses (and Misuses) of similarity hashes in binary analysis
No full textFuzzy hashing algorithms provide a convenient way of summarizing in a compact form the content of files, and of looking for similarities between them. Because of this, they are widely used in the security and forensics communities to look for similarities between binary program files; one version of them, ssdeep, is the de facto standard to share information about known malware. Fuzzy hashes are quite pervasive, but no study so far answers conclusively the question of which (if any) fuzzy hashing algorithms are suited to detect similarities between programs, where we consider as similar those programs that have code or libraries in common. We measure how four popular algorithms perform in different scenarios: when they are used to correlate statically-compiled files with the libraries they use, when compiled with different flags or different compilers, and when applied to programs that share a large part of their source code. Perhaps more importantly, we provide interpretations that explain the reasons why results vary, sometimes widely, among apparently very similar use cases. We find that the low-level details of the compilation process, together with the technicalities of the hashing algorithms, can explain surprising results such as similarities dropping to zero with the change of a single assembly instruction. More in general, we see that ssdeep, the de facto standard for this type of analysis, performs definitely worse than alternative algorithms; we also find that the best choice of algorithm to use varies depending on the particularities of the use case scenario
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
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