495 research outputs found
Discussion on instantaneous p-q strategies for control of active filters
No full textActive filters (AFs) compensate harmonic currents demanded by non linear or time variants loads, with the aim to draw sinusoidal currents from the source. Different control strategies for AF have been proposed: among them, p-q theory is the most popular. However, the p-q strategy presents some drawbacks. As already reported in the literature, unexpected harmonic frequencies are generated in the source current as a consequence of such a control strategy. The aim of this paper is to provide, by means of the space vector approach to the p-q theory, analytical expressions that allow to determine the order and the amplitude of the harmonic components in the source current as function of load current or voltage harmonic distortion. By means of these expressions the limits and drawbacks of p-q strategies are quantified and a tool able to quantitatively predict the results of such a control is provided. Simulation results presented in the literature are interpreted according to the proposed expressions; moreover, further simulations are carried out in order to analyze some relevant cases not considered in previous works
A new formulation of resonance condition for nonlinear, time-variant and hysteretic circuits
No full textFashion Culture: Power In Fashion with Stefano Tonchi and Grazia d'Annunzio
No full textStefano Tonchi, global chief creative officer for L’Officiel Group, and Grazia d’Annunzio, former deputy director of Vogue Italia, discuss the power of military uniforms and their influence on high fashion. Tonchi is co-author of the book "Uniform: Order and Disorder.
Accounting measurement uncertainty in fuzzy inference
No full textFuzzy inference systems are presently employed in the presence of uncertain models, or when deterministic models are too complex to be implemented Input data to fuzzy inference systems are generally represented by crisp variables also when they represent experimental measurement results, thus disregarding measurement uncertainty. Since recent works have shown that measurement results can be effectively represented, together with their associated uncertainty, by fuzzy variables, this paper proposes a modified fuzzy inference system characterized by considering fuzzy variables as input data.</p
A fuzzy method for the identification of the sources producing harmonic pollution in the elctric network
No full textThe problem of identifying the sources injecting periodic disturbances in the electric systems is a critical point in the assessment of the electric Power Quality. The available methods, based on a deterministic approach, do not always provide correct results under the different possible operating conditions. This paper proposes an innovative method, based on a Fuzzy inference and shows significant simulation results.</p
Wor(l)d-making Libraries: Fantastic Libraries as Creators of Alternative Realities
No full textFantasy fiction often appropriates the topos of the library to reflect upon the generative power of literature and on our ability to tap into it. Since the publication of Jorge Luis Borges’ influential short story, The Library of Babel (1941), the image of the library as a universe in itself, as a repository of virtually boundless (if unfathomable and labyrinthine) knowledge has become a recurring feature in fantasy literature. This essay seeks to investigate how British author Genevieve Cogman and American author Scott Hawkins refer to this tradition in their respective novels The Invisible Library (2014) and The Library at Mount Char (2015), through an analysis of some specific elements. In both texts, the structure of the library is represented as an interdimensional core, a macrocosm from which other dimensions may develop (including our own): each alternative reality hinges upon the library, which is in itself boundless, albeit rigorously arranged. While Cogman chooses to highlight the library’s function as a portal to other worlds, thus staging a traditional quest consistent with the informing paradigms of fantasy fiction, Hawkins stresses its metaphysical quality, reflecting upon the idea of God and its viability in our contemporary culture. Furthermore, these conceptions are equally associated with an understanding of language which enhances the tropes of words as “speaking” things into existence. Whether enchanting or emanating from the library’s ordering force, the verbal tools devised by Cogman and Hawkins revolve around the idea that language is power, and that through language reality can be reshaped
Grazia Deledda’s autobiographical masks
Full text linkAll’interno della produzione di Grazia Deledda, Cosima è il personaggio più autobiografico, come si può notare dagli esempi riportati. È anche possibile scorgere assonanze tra l’autrice ed altre tre figure femminili protagoniste delle sue opere: Regina, protagonista di Nostalgie, Nina di Il Paese del Vento e Maria Concezione di La chiesa della solitudine.Among Grazia Deledda’s characters, Cosima is the most autobiographical one, as we can notice from the examples. Concordance can be noticed between the author and the female characters of her works: Regina is the main character of Nostalgie, Nina in Il Paese del Vento and Maria Concezione in La chiesa della solitudine
LE MASCHERE AUTOBIOGRAFICHE DI GRAZIA DELEDDA
Full text linkWithin the production of Grazia Deledda, Cosima is the most autobiographical character, as can be seen from the examples shown. It is also possible to see similarities between the author and three other female figures protagonists of her works: Regina, protagonist of Nostalgie, Nina of The Country of the Wind and Maria Concezione of The church of solitude.All’interno della produzione di Grazia Deledda, Cosima è il personaggio più autobiografico, come si può notare dagli esempi riportati. È anche possibile scorgere assonanze tra l’autrice ed altre tre figure femminili protagoniste delle sue opere: Regina, protagonista di Nostalgie, Nina di Il Paese del Vento e Maria Concezione di La chiesa della solitudine.
Abstract
Within the production of Grazia Deledda, Cosima is the most autobiographical character, as can be seen from the examples shown. It is also possible to see similarities between the author and three other female figures protagonists of her works: Regina, protagonist of Nostalgie, Nina of The Country of the Wind and Maria Concezione of The church of solitude
Dataset: Using taxonomic treatments to assess an author's taxonomic range: the impactful career of Jocelia Grazia
No full textHere we present the dataset of the descriptive analysis of the bibliographic production of the world renowned heteropterist Dr. Jocélia Grazia. We analyzed a total of 220 published documents, including scientific papers, scientific notes, and book chapters. Additionally, we applied the Plazi workflow to extract taxonomic treatments, images, tables, and references from 75 different documents in accordance with the FAIR (Findability, Accessibility, Interoperability, and Reuse). The extracted treatments are available on TreatmentBank.
grazia-festschrift-basic_metadata.csv: this file contains basic metadata information about all 219 publications published up to 2020 (not inclusive), such as: File, Authors, Journal, Year, Volume, Issue, Pagination, doi.
grazia-festschrift-coauthors_data.csv: this file contains information on the co-authors, separated in different columns, with the country of their affiliation as well. Includes: filename, title, Author 1, Author 1 Country... Author 7, Author 7 Country.
grazia-festschrift-manual_counts.csv: contains manual counts on all of the 219 publications considered in this dataset: filename, title, number of treats, number of new species, number of genera, number of new family.
grazia-festschrift-preanalyses.csv: contains parameters assessed during the pre-analyses of the 219 publications considered in this dataset, including: File, Title, PDF Status, PDF Origin, OCR Quality, Was open-access?, Extracted, Has treatments, Includes Taxonomy?, Description of?, Species name as header?, Has keys, Has tables, Has materialCitation?, Has treatmentCitation?
grazia-festschrift-tb_stats-collecting_country.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Number of Materails Citation, Collecting Country.
grazia-festschrift-tb_stats-collecting_year.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Number of Materials Citations, Collecting Year. This wasn’t used in the dashboards included in the paper.
grazia-festschrift-tb_stats-collector_name.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Number of Materials Citations, Collector Name.
grazia-festschrift-tb_stats-overall.csv: results from the API call described in the paper, on 2020209, including general stats on the liberated data for the project: Number of Articles, Document Author, Number of Treatments, Number of Treatment Citations, Number of Materials Citations, Number of Figures, Number of Tables, Number of Bibliographic References.
grazia-festschrift-tb_stats-taxon_authority_names.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Taxon Authority Name.
grazia-festschrift-tb_stats-taxonomic_ranks.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Document UUID, Rank of Taxon.
grazia-festschrift-tb_stats-taxonomic_status.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Document UUID, Taxonomic Status.
grazia-festschrift-tb_stats-treatCit_cited_authors.csv: results from the API call described in the paper, on 2020209: Number of Treatments, Number of Treatment Citations, Cited Authors.
grazia-festschrift-to_Zenodo.csv: this was the file used to batch upload publications to Zenodo, including the resulting DOI, minted in case of absence of this PID. Includes: filename, motivation, upload_type, publication_type, publication_date, title, original_doi, journal_title, journal_volume, journal_issue, journal_pages, part_of_title, partof_pages, thesis_supervisor_01, thesis_01_affiliation, thesis_university_01, language, creator_1_name, creator_1_affiliation… creator_8_name, creator_8_affiliation, description, access_right, license, Keyword_1… Keyword_16, contributor_1_name, contributor_1_type, community_1, doi
Three-phase distributed model of high-voltage windings to study internal steep-fronted surge propagation in a straightforward transformer
No full textA three-phase distributed constants model for high-voltage windings of a transformer is presented. The mutual couplings between phase coils are considered introducing some approximations. Applying the Clarke transformation to the proposed model, the voltage and current surge waves are provided by a simple numerical method. In this way, the model can be used to design the insulation between the turns of a single coil and between the windings and the iron core. A comparison of the numeric results obtained by applying the proposed method with the results obtained by other authors confirms the validity of the model. Moreover, further results are obtained: the proposed approach allows also finding the voltage and current waveforms for asymmetric faults.</p
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