1,721,008 research outputs found
Ottimizzazione del Rendimento di Letti Percolatori Attraverso un Processo Biologico a Doppio Stadio
No full textViene riportata un’analisi del modello di funzionamento del sistema di depurazione LPB (Letto Percolatore e Bioflocculazione) basata su elaborazioni teoriche e convalida delle stesse sulla base di dati sperimentali. Il processo viene proposto sia come intervento migliorativo di impianti esistenti, sia come soluzione progettuale innovativa nella depurazione di reflui provenienti da piccole comunità, in quanto garantisce buoni rendimenti depurativi a fronte di un ridotto impegno economico e di una relativa semplicità gestionale
Ottimizzazione del Rendimento di Letti Percolatori Attraverso un Processo Biologico a Doppio Stadio
No full textViene riportata un’analisi del modello di funzionamento del sistema di depurazione LPB (Letto Percolatore e Bioflocculazione) basata su elaborazioni teoriche e convalida delle stesse sulla base di dati sperimentali. Il processo viene proposto sia come intervento migliorativo di impianti esistenti, sia come soluzione progettuale innovativa nella depurazione di reflui provenienti da piccole comunità, in quanto garantisce buoni rendimenti depurativi a fronte di un ridotto impegno economico e di una relativa semplicità gestionale
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
Infinite-Dilution Activity Coefficients of Polar and Non-polar Solvents in Solutions of Hyperbranched Polymers
No full textInfinite-dilution activity coefficients are measured for several polar and nonpolar solvents in hyperbranched polymers using inverse gas chromatography in the temperature range 40−160 °C. Two kinds of polymers are studied: comb polymers and dendritic polymers. The combs are poly(styrene-co-maleic anhydride) with alkyl side chains of different lengths (C12, C22). The solvents are: acetone, toluene, tetrahydrofuran (THF), and chloroform. Solvent solubility in the combs depends on the ratio between the polar backbone and the nonpolar side chain of the polymer. The dendrimers are amine-terminated poly(propylenimine) of generation 2 to 5. The solvents are: methanol, ethanol, ethyl acetate, toluene, and THF. Solvent activity coefficients change with respect to the dendrimer generation number, reaching a minimum at generation 4. Because the dendrimers are basic, the solvent quality is higher for slightly acidic solvents, such as methanol and ethanol. Flory's interaction parameters are calculated for the solvent/dendrimer systems
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