1,722,219 research outputs found
Verso una traduzione italiana del Traité de Documentation.
No full textDopo aver presentato il testamento filosofico di Paul Otlet, Le Traité de Documentation. Le livre sur le livre. Théorie et pratique, vengono indagate le motivazioni per le quali possa essere necessaria una traduzione italiana integrale dell'opera, le scelte traduttive da compiere e viene evidenziato il valore del Trattato da un punto di vista linguistico e concettuale
A Diffusive Model for Alpha Particle Energy Transport in a Laser Plasma
No full textThe ignition of a laser fusion target is essentially due to the energy that the α-particles yielded by the D-T reactions in a small innerhot-spot transfer to the outer cold and dense plasma. It is shown that, if the plasma temperature is ≤ 30 keV, the problem of α-particle energy transport reduces, in good approximation, to the solution of a single diffusive equation for the kinetic-energy density of the α-particles. This method is favourably compared with other models and is included in a 1D Lagrangian code
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
The role of human autoantibodies against gamma-interferon.
No full textNatural antibodies to γ-interferon (IFN-γ) were detected in the serum of viral infected patients and also in the serum of healthy subjects at a lower titre. The increased titres of antibodies to IFN-γ in sera from viral infected patients, and their decrease with clinical resolution, indicates that these antibodies are related to the viral infection and probably reflect IFN-γ production as a result of antigenic stimulation in vivo. These antibodies were affinity-purified and studied for their capability to interfere with the multiple activities of IFN-γ in vitro. Data obtained show that human anti-IFN-γ antibodies interfere with the immunomodulating activity but not with the antiviral and antiproliferative activity of lymphokine. Autoantibodies to IFN-7 may have a role in the immunoregulatory process serving to limit the intensity and or duration of the immune response. Being able to interfere with the immunomodulating activities of IFN-γ, these antibodies might open up new therapeutic possibilities for those diseases which carry evidence of activated cell-mediated immunity
Selected papers of ICTCS 2016 (The Italian Conference on Theoretical Computer Science (ICTCS)
No full textInertial Confinement Fusion: Ignition of Isobarically Compressed D-T Targets
No full textIgnition of initially isobaric D-T plasmas, triggered by a hot spot, surrounded by denser, cold fuel, is studied both analytically and numerically. It the conditions for self-heating of the not spot are met, then a burn wave propagates, at first through deflagration driven by α-particles, and eventually through detonation. After an initial transient phase and the self-heating stage, burn in propagated mainly by α-particle transport, while the burning region is cooled at comparable rates by heat conduction and hydrodynamic expansion. The whole process is described by means of three dimensionless quantities (related to α-particle production, thermal conductivity and α-particle transport, respectively), and, as suggested by ID numerical results, an ignition criterion is given in terms of two of them. Examples of applications show, its usefulness in target design. A condition for burn propagation is also derived
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
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