Search results for "Etre"

The Measurement of Reactive Energy in Polluted Distribution Power Systems: An Analysis of the Performance of Commercial Static Meters

2008

This paper presents a comparative analysis of the performances of both a traditional induction meter and various types of commercial static meters for reactive energy in the presence of harmonic distortion. This is a topical issue, since there are several types of static meters on the market, based on different principles of construction. In accordance with current standards, these meters are designed to operate in sinusoidal conditions and their performance is not tested in the presence of harmonic distortion. However, with the increase of pollution levels in power systems, the meters may be used even in the presence of distorted voltages and/or currents; in such cases, their accuracy may …

Les estratègies de traducció d’Andreu Febrer en la seva versió de la Commedia de Dante

2020

This paper studies the technique applied by Andreu Febrer in the verse translation of Dante’s Commedia , in which he preserved both the metre and the meaning. The adopted point of view diverges from the usual appraising approach to this translation, describing instead the varied techniques used by the translator. The examples analised show a skilled and creative poet able to preserve the formal constriction without sacrificing the semantic accuracy with respect to Dante’s text.

El programa minimista en la teoria de principis i paràmetres

2021

This paper intends to offer a general overview of the ideas that have been proposed in generative grammar in the last decade. The theoretical framework that supports them is summarized (the Principles and Parameters theory) and we explain some conceptual changes that the theory has undergone from its first formulation (known as the Government and Binding model) to the recent proposals (known as the Minimalist model). The changes introduced under the minimalist perspective obbey to the necessity of eliminating some theoretical artifacts by submitting to scrutiny some assumptions. The Minimalist view suggests that the only possible grammatical operations are the unavoidable ones that are trig…

Unes lletres de batalla en temps del Tirant: Joan Francesc de Pròixita contra Don Pero Maça de Liçana

2003

Publication and study of the “lletres de batalla” (written challenges to combat) exchanged by the Valencian nobles Don Pero Maça de Liçana and Joan Francesc de Pròixita. The affair ended in a combat, with the King of Navarre as judge, which took place at Pau (Bearn) on 5 February 1487. The dispute had a considerable impact on contemporaries and was picked up by historians and later writers.

Anàlisi de la interpretació dels termes literals per alumnes de secundària

2012

Tal com diu Freudenthal (2001), el llenguatge algebraic és un llenguatge formal amb una estructura clara que permet expressar les relacions amb precisió i simplicitat. Al contrari que el llenguatge vernacle que pot resultar ambigu ja que, en nombroses ocasions, es fa ús de termes que poden tindre una multiplicitat de significats, fet que provoca una inevitable incertesa. Així i tot, els estudiants que s’inicien en l’àlgebra troben dificultats quan a l’enteniment d’aquesta rama de la matemàtica, potser degut a problemes de comprensió i/o interpretació de la seua estructura i llenguatge o al canvi de concepció que ha de produir-se al passar de l’estudi de l’aritmètica al de l’àlgebra, entre a…

Thermal conductivity measurement of insulating innovative building materials by hot plate and heat flow meter devices: A Round Robin Test

2019

Abstract The characterization of thermal insulation properties of construction materials represents a fundamental step on the building insulation assessment. In recent years innovative materials have been introduced in the market to fulfill the continuously growing requirements of energy saving and sustainability, and their performance is not so reliable and mature as it happens for traditional insulators. The work presents a Round Robin Test realised among six European laboratories hosting hot plates devices to measure the thermal conductivity of four different materials: aerogel, vacuum insulation panels, polystyrene and birch wood fibre insulation boards. After the definition of the comm…

Combustion properties of spruce black liquor droplets : Sulfur-free pulping and influence of hot-water pretreatment

2016

Hot-water pretreatment of lignocellulosics prior to sulfur-free alkaline pulping is an interesting approach for recovering value-added carbohydrate- and lignin-derived materials. This paper investigated the chemical composition variations and combustion properties of the black liquors (BLs) from three different cooking processes: two sulfur-free soda-anthraquinone (soda-AQ) and oxygen-alkali (O2-NaOH) cooks and kraft cook, before and after hot-water pretreatment of the spruce sawdust. Relatively less aliphatic acids but more lignin were present in the BLs after hot-water pretreatment as cooking time prolonged. In general, the burning time decreased as follows: soda-AQ BL > O2-NaOH BL ≅ kraf…

Corrigendum: Psychological Effects of a 1-Month Meditation Retreat on Experienced Meditators: The Role of Non-attachment

2020

Propagation Length of Antiferromagnetic Magnons Governed by Domain Configurations.

2019

Spintronics seeks to functionalize antiferromagnetic materials to develop memory and logic devices operating at terahertz speed and robust against external magnetic field perturbations. To be useful, such functionality needs to be developed in thin film devices. The key functionality of long-distance spin-transport has, however, so far only been reported in bulk single crystal antiferromagnets, while in thin films, transport has so far been limited to a few nanometers. In this work, we electrically achieve a long-distance propagation of spin-information in thin films of the insulating antiferromagnet hematite. Through transport and magnetic imaging, we demonstrate a strong correlation betwe…

Yield behavior of magnetorheological suspensions

2003

The rheology of suspensions containing magnetic particles of micrometer size is strongly modified by the application of a magnetic field. We first describe a model experiment where the suspension is made of spheres of millimeter size and we show that the experimental dependence of the yield stress is well predicted by a non-affine model where the chains of particles break in the middle. Then we compare these predictions with some experimental results obtained on suspensions of carbonyl iron; it is shown that this model does not apply in this case. We propose a mechanism where after some friction on the walls the aggregates begin to rotate and break at a strain smaller than unity, due to the…