1,720,967 research outputs found
Ground fault analysis in a microgrid scenario
No full textMicrogrids are based on the same grounding schemes generally adopted in the low voltage radial distribution grids. Unlike traditional distribution grids, in islanded microgrids the neutral grounding becomes a complex problem due to different operating configurations. All the electrical devices connected to the microgrid must be modeled to guarantee the access to the neutral point and their models have to be easy to include in the whole microgrid model. The Voltage Behind Reactance model is here introduced to meet these requirements in the synchronous machine modeling, and the complete model of a benchmark islanded microgrid is developed. The line-to-ground fault transient under different neutral grounding configuration are analyzed
Damping of low frequency oscillations using a PV+BESS installation: practical design case
No full textLa 'lectura' di Boccaccio: il Teseida fra autografo e ricezione
No full textIl saggio si occupa della tradizione del 'Teseida' di Giovanni Boccaccio, prima opera epica della letteratura italiana. Dopo un esame dei codici antiquiores si offre per la prima volta un'agnizione significativa ossia che la mano del codice di Aix-en- Provence, già riconosciuta al poeta trecentesco Adriano de' Rossi, è la stessa di quella che copia il manoscritto di Philadelphia, University of Pennsylvania Library, ms. 254 . Quindi si verifica lo stemma codicum proposto per l'opera di Boccaccio, esaminando una serie errori e di lezioni significative.The essay deals with the tradition of 'Teseida' by Giovanni Boccaccio, the first epic work of Italian literature. After an examination of codices antiquiores codes is offered a significant result namely that the hand of the Aix-en- Provence code, already recognized in the fourteenth-century poet Adriano de 'Rossi, is the same one that copies the manuscript Philadelphia , University of Pennsylvania Library, ms. 254. Then there is the proposed stemma codicum for the work of Boccaccio, examining a series errors and significant lessons.L'essai traite de la tradition du «Teseida» par Giovanni Boccaccio, la première œuvre épique de la littérature italienne. Après un examen des codices antiquiores est offert pour la première fois un'expertise à savoir que la main du code Provence Aix-en-, déjà reconnu dans le poète du XIVe siècle, Adriano de Rossi, est le même que celui du manuscrit de Philadelphie, Université de Pennsylvanie Library, ms. 254. Ensuite, il est proposé une reflexion sur le stemma codicum du texte de Boccace, en examinant les erreurs et les leçons caractéristiques
Boccaccio in versi. Atti del Convegno (Parma, 13-14 marzo 2014)
No full textIl saggio si occupa della tradizione testuale delle Rime di Boccaccio e di molte consonanze tematiche della rimeri
Efficiency comparison of DC and AC coupling solutions for large-scale PV+BESS power plants
Full text linkIn large-scale photovoltaic (PV) power plants, the integration of a battery energy storage system (BESS) permits a more flexible operation, allowing the plant to support grid stability. In hybrid PV+BESS plants, the storage system can be integrated by using different power conversion system (PCS) layouts and different charge–discharge strategies. In the AC-coupling layout, the BESS is connected to the ac-side of the system through an additional inverter. In the DC-coupling layout, the BESS is connected to the dc-side, with or without a dedicated dc–dc converter, and no additional inverter is needed. Referring to a 288 MWp PV plant with a 275 MWh BESS, this paper compares the PCS efficiency between AC-and DC-coupling solutions. The power injected into the grid is obtained considering providing primary power-frequency regulation services. A charging and dis-charging strategy of the BESS is proposed to ensure cyclic battery energy shifting. The power flows in the different components of the system that are obtained under realistic operating conditions, and total energy losses and annual average efficiency are calculated accordingly. Finally, results show a higher efficiency of DC-coupling compared to the AC-coupling layout
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
Note sulla ricezione delle «Rime» di Boccaccio fra Sette e Ottocento
No full textIl contributo ricostruisce la fortuna critica delle "Rime" di Giovanni Boccaccio fra Sette e Ottocento, dall'Arcadia a F. De Sanctis
Osservazioni sull’ottava di Boccaccio
No full textIl saggio analizza il trattamento sintattico dell'ottava di Boccaccio, in relazione all'ottava dei cantari del Trecento
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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