1,721,143 research outputs found
La terapia immunodepressiva del granuloma gangraenescens secondo le piu' recenti acquisizioni sulla patogenesi della malattia
No full textThe Authors discuss their experiences with three cases of granular gangraenescens of the Stewart type, using immunosuppressive treatment by administering eparine and protamine sulphate. The action mechanism of the treatment is described. Even although the results obtained were only from three cases, they are encouraging; especially if the treatment is given in the early stages of the disease
Specific local immunity of superior air tracts, particulary concerning Waldeyer's ring
No full textThe immuno-istochemical method allowed to demonstrate, in adenoids and tonsils affected physiological phlogosisthe presence of a considerable number of plasmocytic IgA-positive elements and a lesser number of IgG and IgM-positive elements. In the cours of an inflammatory relapsing the IgG fraction increases remarkably, whereas the IgA and the IgG ones remain unchanged. Moreover, a greater number of strongly marked clear centers are observable. The basilar defence at the level of the upper respiratory tract, in particular of the adenoid tissues, is mainly ensured by IgA, while in emergency conditions, such as an acute phlogosis, the antimicrobial defencre is assumed by IgG
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
Liouville theorem for -harmonic maps under non-negative -Ricci curvature for non-positive
Full text linkLet be a -vector field on an -dimensional complete Riemannian
manifold . We prove a Liouville theorem for -harmonic maps
satisfying various growth conditions from complete Riemannian manifolds with
non-negative -Ricci curvature for
into Cartan-Hadam\-ard
manifolds, which extends Cheng's Liouville theorem proved S.~Y.~Cheng for
sublinear growth harmonic maps from complete Riemannian manifolds with
non-negative Ricci curvature into Cartan-Hadamard manifolds. We also prove a
Liouville theorem for -harmonic maps from complete Riemannian manifolds with
non-negative -Ricci curvature for
into regular geodesic balls
of Riemannian manifolds with positive upper sectional curvature bound, which
extends the results of Hildebrandt-Jost-Wideman and Choi. Our probabilistic
proof of Liouville theorem for several growth -harmonic maps into Hadamard
manifolds enhances an incomplete argument by Stafford. Our results extend the
results due to Chen-Jost-Qiu\cite{ChenJostQiu} and Qiu\cite{Qiu} in the case of
on the Liouville theorem for bounded -harmonic maps from
complete Riemannian manifolds with non-negative -Ricci curvature
into regular geodesic balls of Riemannian manifolds with positive sectional
curvature upper bound. Finally, we establish a connection between the Liouville
property of -harmonic maps and the recurrence property of
-diffusion processes on manifolds. Our results are new even in the
case for
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
Vander : Fisiologia
No full textQuesto testo rappresenta la prima edizione italiana di un’opera, giunta alla XII edizione in lingua inglese, che si caratterizza per la felice coesistenza di due caratteristiche raramente presenti entrambe in un unico trattato: la sintesi e la completezza. Un’esposizione ricca, ben organizzata, in cui i concetti complessi sono presentati con semplicità e chiarezza.
Estremamente aggiornato, il testo presenta la fisiologia in un’ottica integrata ed è corredato da numerosi cenni di fisiopatologia e da riferimenti all’anatomia che precedono la descrizione degli aspetti funzionali. Inoltre ogni capitolo è concluso da un caso clinico relativo agli argomenti trattati per permettere al lettore di sviluppare conoscenze di fisologia applicata, con un approccio problem based learning che vada oltre la normale acquisizione delle nozioni presentate nel testo. Sempre a questo scopo, l’ultimo capitolo è costituito da una raccolta di quattro casi clinici più complessi che integrano tra loro gli argomenti discussi nel testo.
Molto significativo è anche l'insieme di risorse dedicate alla verifica autonoma dell’apprendimento: al termine di ogni sezione sono presenti domande di ripasso sugli argomenti appena affrontati, mentre al termine di ogni capitolo si trovano numerosi test di autovalutazione e domande di ragionamento e calcolo. Inoltre, tutti i capitoli sono arricchiti da domande di fisiologia, più strutturate, la cui risposta richiede un’efficace comprensione degli argomenti trattati e una buona capacità di integrazione degli stessi. Le risposte di tutte le domande e di tutti i test sono presentate alla fine dei capitoli o in appendice.
L’apparato iconografico è particolarmente ricco e assolutamente aggiornato, e facilita notevolmente l’apprendimento di una materia non sempre intuitiva.
Infine, in fondo al volume è presente un glossario che raccoglie i termini tecnici più significativi, dei quali viene fornita definizione per permettere allo studente di richiamarne immediatamente il significato
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