Search results for "armo"
showing 10 items of 1364 documents
The Case Law of the ECtHR in 2020 in the Light of the Principle of Systemic Harmonisation
2021
This article provides for an overview of some relevant developments in the case-law of the ECtHR in 2020. Priority will be given to Grand Chamber judgments and decisions and those of the Chambers deemed to be relevant from a substantial and procedural viewpoint. Given that in 2020 the Steering Committee for Human Rights published its report on ‘The Place of the European Convention of Human Rights in the International and European Legal Order’, the case-law will be selected and examined from the viewpoint of the principle of systemic harmonisation. The aim is highlighting positive and negative examples of application of general international law by the ECtHR, of cross-fertilisation between t…
Monte Carlo simulation of high‐order harmonics generation in bulk semiconductors and submicron structures
2004
To qualify the feasibility of standard semiconductor materials and Schottky‐barrier diodes (SBDs) for THz high‐order harmonic generation and extraction, the harmonic intensity, intrinsic noise and signal‐to‐noise ratio are calculated by the Monte Carlo method when a periodic high‐frequency large‐amplitude external signal is applied to a semiconductor device. Due to very high signal‐to‐noise ratio heavily doped GaAs SBDs are found to exhibit conditions for frequency mixing and harmonic extraction that are definitively superior to those of bulk materials. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
El ecofeminismo
2017
El Ecofeminismo, más allá de una tendencia, es un modo de ver la vida y los procesos que de ella subyacen, es por tanto una filosofía de trabajo. Este modo de entender la existencia, basado en la reivindicación de modelos no patriarcales y holísticos, está surcado por diferentes tendencias, desde experiencias diversas, pero nacen de un tronco común y complementan un modo de estar del mundo: la conciencia de ser naturaleza. Estos principios de trabajo, por la riqueza de los mismos, podrían muy bien ayudar a hilvanar el discurso transversal de un programa formativo basado en el humanismo muy en sintonía con la Educación Popular.
Caging techniques for field exposures of fish to chemical contaminants
2005
The article reviews current state-of-the-art to conduct fish caging as an assessment and monitoring technique in aquatic toxicology. A multitude of scientific, practical and management factors influence and may restrict how field research is carried out. For many purposes the advantages of transplant fish caging outweigh the alternative methodologies of impact studies of xenobiotics. However, besides mortality, virtually no study has evaluated the physiological consequences of caging fish. It is not known how caging itself affects the responses of fishes to chemical pollution. The used caging densities are commonly too high. However, with the aid of variables describing physiological stress…
Intrinsic competition between two European egg parasitoids of the brown marmorated stink bug
2020
Following the accidental introduction and spread of the invasive polyphagous agricultural pest Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), the two European egg parasitoids Anastatus bifasciatus (Geoffroy) (Hymenoptera: Eupelmidae) and Ooencyrtus telenomicida (Vassiliev) (Hymenoptera: Encyrtidae) have been investigated for inundative biological control. Since the competititve outcome between the two generalist parasitoids is difficult to predict, intrinsic competition was investigated with a time-course development study. Both species readily oviposited in H. halys eggs containing eggs and early instar larvae of the competitor, but oviposition decreased when eggs contained late insta…
The Logical Sequence of Regional Economic Integration
2021
Globally, regional economic communities are classified in what is customarily called the linear model of integration. The question arises as to where African RECs stand on a stylized linear path of economic integration and to what extent this model can provide guidance for further integration steps. The factual nonlinearity of the ‘model’ is discussed and the ensuing challenges for economic integration are identified in terms of monetary unions, non-tariff measures/barriers (with a new typology) and harmonization of standards. In a final step, the ‘model’ itself is amended and critically discussed in the light of the question of whether a scheme largely inspired by the European experience c…
Molecular origin and hydration dependence of protein anharmonicity: an elastic neutron scattering study.
2010
Two main onsets of anharmonicity are present in protein dynamics. Neutron scattering on protein hydrated powders revealed a first onset at about 150 K and a second one at about 230 K (the so called dynamical transition). In order to assess the molecular origin of protein anharmonicity, we study different homomeric polypeptides by incoherent elastic neutron scattering, thus disentangling the contribution of different molecular groups in proteins. We show that methyl group rotations are the main contributors to the low temperature onset. Concerning the dynamical transition, we show that it also occurs in absence of side chains; however, the presence and mobility of side chains substantially i…
Experimental Validation of a Novel Method for Harmonic Mitigation for a Three-Phase Five-Level Cascaded H-Bridges Inverter
2019
In modern high-power electrical drives, the efficiency of the system is a crucial constraint. Moreover, the efficiency of power converters plays a fundamental role in modern applications requiring also a limited weight, such as the electric vehicles and novel more electric aircraft. The reduction of losses pushes for systems with a dc bus and a high number of dc/ac converters, widespread in the vehicle, not burdened by a too expensive data processing system. The purpose of this article is to concur to reduce losses by proposing an innovative selective harmonic mitigation method based on the identification of the working areas where the reference harmonics present lower amplitudes. In partic…
Bearing fault diagnosis for inverter-fed motors via resonant filters
2014
Current-based technique is an economic solution to detect bearing faults in drive-trains. Localized faults produce characteristic vibration frequencies. When an electric motor is supplied by a frequency-converter, the current response includes not only the fundamental and fault related frequencies but also higher harmonics from the inverter. This paper introduces a resonant filter to pick up frequency components caused by the localized faults. The bearing fault frequencies are calculated by bearing geometry and motor speeds. The filter frequencies are selected as a function of motor speeds. The filter is independent of the load condition, so it can work at different motor operating points t…
A Contribution to Tests Standardization for Inverter-Fed Asynchronous Machines
1986
Losses of inverter-fed asynchronous motors and their experimental evaluation are considered. The formal expressions of iron and copper losses are first recalled, and it is shown as they are influenced by the harmonic content of inverter output voltages. Theoretical and experimental values of these losses are then given together with the presentation of the experimental tests used for their determination. A suitable set of tests is then suggested for the determination of the conventional efficiency of inverter-fed asynchronous motors. The content cannot be considered exhaustive on the matter. It represents only a first contributive approach to the standardization of inverter-fed asynchronous…