1,720,959 research outputs found
Analisi Numerica di Problemi di Convezione Naturale Turbolenta in Cavità Rettangolari: Confronto fra Volumi di Controllo ed Elementi Finiti
No full textLA TERMOTECNIC
Progettazione di pompe centrifughe
No full textA calculation program is presented for CAD based checking of the impellers of a standardized series of hydraulic pumps with k = wQ0.5(gH)-0.75 = 0.375 - 0.600 (Q is the volumetric flow in m3/s), w is the angular velocity in rad/s, and H is the head in the impeller), mainly on the basis of the classical method of Donath. The fluid dynamic and structural design aspects of the impeller are reported
Analisi numerica mediante elementi finiti del flusso viscoso attorno ad un cilindro circolare
No full textProgettazione fluidodinamica e costruttiva di una serie di pompe centrifughe mediante l'uso del calcolatore
No full textAnalisi numerica mediante elementi finiti dei fenomeni instazionari nella scia a valle di un corpo cilindrico
No full textExperimentation and optimization of the design of spiral volutes for radial-flow pumps with CAD techniques
No full textPressure distribution in centrifugal pump volutes: numerical and experimental calculations
No full textxamines some classical theories for the calculation of pressure trends in centrifugal pump volutes, applied to a machine of known geometry. Pressure trends obtained by theoretical calculations are compared with the experimental results found on a test pump in different operating conditions. On the basis of the pressure values measured in the volute, calculations are made on the radial forces discharged on the shaft and, in turn, on the pump bearings. Theoretical and experimental results are then compared. (A
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
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