1,721,041 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
An overview on anti-tubulin agents for the treatment of lymphoma patients
Full text linkAnti-tubulin agents constitute a large class of compounds with broad activity both in solid tumors and hematologic malignancies, due to the interference with microtubule dynamics. Since microtubules play crucial roles in the regulation of the mitotic spindles, the interference with their function usually leads to a block in cell division with arrest at the metaphase/anaphase junction of mitosis, followed to apoptosis. This explains the reason why tubulin-binding agents (TBAs) proved to be extremely active in patients with cancer. Several anti-tubulin agents are indicated in the treatment of patients with lymphomas both alone and in combination chemotherapy regimens. The article reviews the literature on classic and more recent anti-tubulin agents, providing an insight into their mechanisms of action and their use in the treatment of lymphoma
Osservazioni su alcuni parametri di composizione e igienico-sanitari del latte d’asina
No full textSono riportati i risultati di un’indagine sulla qualità del latte d’asina prelevato presso quattro aziende siciliane da 27 animali nel corso della lattazione.
La ricerca approfondisce alcuni aspetti relativi alla composizione ed all’assetto igienico-sanitario del prodotto, anche in funzione di quanto esplicitato nel Regolamento (CE) 853/2004 che include
“altre specie” lattifere e sottolinea la futura emanazione di una normativa più specifica sulla qualità del latte e dei derivati. Gli AA auspicano che la presente indagine, unitamente ad altri
studi sull’argomento, fornisca un contributo al fondamento scientifico sul quale dovrebbe essere basata la formulazione di specifici criteri normativi applicabili al latte d’asina; ciò soprattutto in
funzione dell’utilizzo del prodotto per fini terapeutici in soggetti in età infantile.
Sulla base dei risultati ottenuti il latte di asina si è confermato a basso contenuto in grasso e proteine e con un buon contenuto in lattosio.
Piuttosto elevato è stato riscontrato il contenuto medio in urea. I valori in cellule somatiche e carica batterica totale, nonché l’assenza di batteri potenzialmente patogeni, hanno dimostrato la
buona qualità igienico-sanitaria del prodotto esaminato.
In conclusione, si incoraggiano interventi migliorativi applicabili al particolare settore produttivo, atti a garantire un’ottimale utilizzazione del latte.The results of a study on the quality of donkey’s milk from four farms in Sicily, from 27 animals during lactation, are showed. The article gives a better knowledge on some aspects of composition, sanitary and safety parameters of donkey’s milk, also in view of some specifications of EC regulation 853/2004. This latter includes “other species” as milk animal species and underlines the formulation of specific rules related to the quality of raw milk and of dairy products.
The authors wish that the survey, as others of the same topic, will contribute to the scientific basis that would inspire the formulation of specific criteria for donkey’s milk, in view of the hoped-for
future therapeutic use for infants.
On the basis of the showed results, low fat and protein contents, but high lactose percentage, were confirmed for donkey’s milk. An high urea content was found. Means for somatic cell count
and standard plate count and the absence of pathogens showed a good sanitary and safety condition of donkey’s milk samples.
Concerted efforts are needed to improve the field of donkey’s farms management and to guarantee a better exploitation of donkey’s milk
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
- …
