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No full textOn the use of the HMCPL shielding system in renewing the underground HV power lines in big cities
No full textUsing underground cables in big cities, one of the most important acceptability issues is the magnetic field mitigation. This paper focuses on the joint bays, which are a critical part of the buried power lines regarding the magnetic field generation. For technical reasons, within a joint bay cables have to be arranged in flat configuration with an increment of the cable distances which cause a higher magnetic field generation compared to the trefoil arrangement. For a standard buried power line the magnetic field above a joint bay can be 10 times higher than the one of the trefoil. Joint bays are usually mitigated by means of passive shields. The literature covers comparisons of flat metallic shields, passive loops and passive loops with improved magnetic coupling (called HMCPL). In the renewal of the HV grid of Torino, from 2010 to 2014 sixteen new 220 kV lines were laid. The total length is about 50 km. The cables were provided from three different manufacturers. A total of 70 joint bays were installed. 20 of 70 joint bays required, for their position, a mitigation action. In 14 of them, HMCPL system has been used; in the others 6, the classical passive loops system has been installed. In this paper the results of measurement data concerning a sample of the joint bays are presented. The measurement results serve to compare the magnetic field with joint bays without a mitigation system and also to compare the HMCPL with the classical passive loops. Regarding the innovative HMCPL shielding system, in Torino it has been made the more extensive application; furthermore, the results are very satisfactory: the average value measured at the reference point is reduced of about ten times. We also experienced that the site assembly of the system is fast and flexible
Tools for optimal operation and planning or urban distribution systems
Full text linkThis paper reports on the results of the implementation of a set of software tools for the comprehensive analysis and optimisation of distribution systems, developed jointly by Azienda Energetica Metropolitana (AEM) Torino S.p.A. and Dipartimento di Ingegneria Elettrica Industriale - Politecnico di Torino. The software tools cover several aspects of distribution system analysis, fault current calculation, reliability assessment, total operating cost evaluation, optimal reconfiguration, optimal planning and service restoration
ELF field characterisation of electrical energy generation, transmission, and distribution systems
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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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