Search results for " coi"

Zero Ripple Current with Coupled Inductors in Continuous Conduction Mode under PWM Signals

2020

This article presents a generalized analysis to explain current ripple of an $m$ windings coupled inductor with a given coupling factor $k_{ij}$ for each pair of windings and then studies more in detail its use in the continuous conduction mode and with pulsewidth modulated signals. To determine the current ripple, a generalized expression of the equivalent inductance of each winding is calculated, including the influence of voltage unbalance. In the ideal case, the equivalent inductance shows that the current ripple can only become $m$ times smaller than that with uncoupled inductors. But in the unbalanced case, some divergences of the equivalent inductance appear that are responsible for …

Politics of belonging in Brussels’ European Quarter

2019

The European Union (EU) has been criticised for a lack of imageries and sites of memory that nation-states have traditionally utilised in their identity-building. The EU, along with other actors, has responded to this iconographic deficit with memory and heritage initiatives and branding campaigns. This article explores how this deficit is dealt with in the European Quarter in Brussels by enlivening it through cultural regeneration and creating narratives that link Europe’s and the EU’s past with the present. The article utilises hermeneutic phenomenological approach combining observation and interpretation of diverse place-making practices, such as monuments, memorials, public artworks, hi…

The Roman circus and southwestern city quarter of Carthage: first results of a new international research project

2018

AbstractThe paper presents first results of a joint German–Tunisian research project in Carthage, Tunisia. Archaeological fieldwork has been undertaken (preceded by a geophysical survey) in the southwestern quarter of the ancient city to study the architecture, chronology and urban context of the circus. The area has, unlike the rest of Carthage, not been targeted by excavations of the late nineteenth/early twentieth centuries and, also unlike the rest of Carthage, is mostly not overbuilt, although under pressure from neighbouring communities. The area is the last one allowing a large-scale diachronic urban study in which the circus and its impact on the quarter is in the centre. From our f…

Identity, nation‐state and football in Spain. the evolution of nationalist feelings in Spanish Football

2007

This essay shows the importance of the identity component in the development of Spanish football from its birth at the beginning of the twentieth century, when football was organized at a regional level, until the present time when football reflects the democratic and post‐national Spain created after the arrival of democracy in the last quarter of the twentieth century. The essay expounds the existence of four periods in the development of the nationalistic feelings with which Spanish football has been embodied: the pre‐national or regional period, the period of Spanish nationalization, the period of strengthening of peripheral nationalisms and the post‐national period. In order to explain…

Raman spectroscopy characterization of 10-cash productions from the late Chinese emperors to the Republic

2017

[EN] The use of Raman spectroscopy for discriminating monetary emissions, a recurrent problem in much archaeological studies, is described. The method involves the record of Raman signatures of tenorite and crystalline and defective cuprite in the patina based on the idea that subtle, mint-characteristic variations in the composition and metallography of the base metal during the manufacturing process are reflected in the variation in depth of the composition and crystallinity of the corrosion patina. The technique was applied to a series of 10-cash copper coins produced around the transition between the Kuang Hsu and Hsuan Tung last Chinese emperors and the first Republic whose averaged co…

Archaeometric analysis of Roman bronze coins from the Magna Mater temple using solid-state voltammetry and electrochemical impedance spectroscopy

2017

Voltammetry of microparticles (VMP) and electrochemical impedance spectroscopy (EIS) techniques, complemented by SEM-EDX and Raman spectroscopy, were applied to a set of 15 Roman bronze coins and one Tessera from the temple of Magna Mater (Rome, Italy). The archaeological site, dated back between the second half and the end of the 4th century A.D., presented a complicated stratigraphic context. Characteristic voltammetric patterns for cuprite and tenorite for sub-microsamples of the corrosion layers of the coins deposited onto graphite electrodes in contact with 0.10 M HClO4 aqueous solution yielded a grouping of the coins into three main groups. This grouping was confirmed and refined usin…

Screening of Iberian Coinage in the 2(th)-1(th) BCE Period Using the Voltammetry of Immobilized Particles

2019

[EN] The voltammetry of immobilized particles (VIMP) was applied for grouping a series of 86 Iberian coins nominally minted in the cities of Iltirta, Castulo and Obulco in the 2(th)-1(th) BCE period for which there are no chronological data. Using characteristic signatures for the reduction of cuprite, tenorite and lead corrosion products in the patina of the coins, voltammetric grouping of coins was proposed. Voltammetric data were found to be consistent with textural and compositional properties of the surface and subsurface of selected coins using FIB-FESEM-EDX. The obtained data confirmed a clear separation between the productions of Iltirta on one side, and those of Castulo and Obulco …

“DNA Barcoding come strumento a supporto della tassonomia zoologica per pesci ossei e crostacei del Canale di Sicilia e dell’identificazione univoca …

La metodica molecolare del DNA Barcoding consente l'identificazione a livello di specie su scala globale utilizzando un approccio basato sul DNA standardizzato e autenticato. Le biblioteche di riferimento che contengono i Barcode validati (COI) costituiscono robusti set di dati per la verifica delle sequenze di query, fornendo notevole utilità per identificare i pesci marini, crostacei e altri organismi. In questo studio è stata analizzata la possibilità di utilizzare il DNA Barcode per assegnare ai campioni analizzati le specie di provenienza, pesci e crostacei, raccolti nel mar Mediterraneo centrale ed è stata sequenziata per la prima volta la regione COI nelle specie di crostacei Alphaeu…

A New Software Tool for Design, Optimization, and Complete Analysis of Rotating Electrical Machines Windings

2015

In this paper, a new software tool developed by the authors for ac winding design, optimization, and complete analysis is presented. In particular, this software can be used as a valid aid in design and analysis for a wide variety of motor and generator windings with generic number of phases (including the case of those machines in which some slots are left empty), pole pairs, slot number, and so on. The calculation of winding factors and the evaluation of their harmonic distribution is also accomplished. The software is implemented in the MATLAB programming environment. By means of some examples, covering the most relevant winding types, the capabilities of this software will be shown. In …

The Insolvency of Cryptocurrency Exchanges: Lessons from the BitGrail Case — Reification of Coins, Pari Passu Ranking, and Nominalism

2019

This paper deals with a recent trend in insolvency of cryptocurrency platforms; comments on the BitGrail case (Court of Florence 17/2019, 21 January 2019) and argues that this decision balances the need to grant legal protection to the injured users and the need to prevent them from having the status of owners, jumping the queue and getting a head start over the other creditors of the platform.