Search results for "Sources"
showing 10 items of 2554 documents
Detection of disturbing loads in distorted and/or unbalanced power systems: a technique based on a comparison among nonactive powers
2007
This paper presents an innovative technique for the detection of disturbing loads in distorted power systems. It is a single-point strategy, based on a comparison among different "nonactive" power quantities already proposed in literature, that are measured at the same metering section. In the paper, the results obtained with the application of the proposed technique are compared with those of other techniques for the monitoring of the harmonic pollution, both single-point and multi-point. Moreover, the effectiveness of the strategy is discussed, considering also the errors of the measurement transducers.
Comparison of Nonactive Powers for the Detection of Dominant Harmonic Sources in Power Systems
2008
This paper deals with an innovative technique for the detection of disturbing loads in distorted power systems. The technique is a single-point strategy based on a comparison among different ldquononactiverdquo power quantities already proposed in the literature, which are measured at the same metering section. In this paper, the effectiveness of the strategy is discussed, which also considered the errors of the measurement transducers; the analysis is supported by simulation tests, which were carried out on both a simple single-phase system and an IEEE standard three-phase test power system. The latter was used by other authors as a benchmark system for the analysis of multipoint measureme…
An enhanced approach based on IEEE 1459 for the detection of disturbing loads in distorted and unbalanced three-phase power systems
2009
This paper presents an enhanced approach for the detection of disturbing loads in distorted and/or unbalanced three-phase power systems in both cases of three and four-wires. It is based on the IEEE Std. 1459-2000 effective apparent power resolution and it requires only the separation of the fundamental components of voltage and current from the remaining harmonic content. In the paper, the formulation of the novel approach is given and some simulation results are presented.
Origin and distribution of suspended organic matter as inferred from carbon isotope composition in a Mediterranean semi-enclosed marine system
1999
The origin and distribution of suspended organic matter, the trophic features and the stable carbon isotopic composition of particulate organic carbon (POC) were studied monthly in a Western Mediterranean semi-enclosed basin. Sampling stations were selected as a function of wind-exposure and the degree of vegetation cover and then compared with an adjacent unvegetated site. The predominant vegetation was seagrass (Posidonia oceanica and Cymodocea nodosa) and Caulerpa prolifera. Water samples were analyzed for total suspended matter (inorganic and organic fractions), photosynthetic pigments (chlorophyll-a and phaeopigments), dissolved organic carbon, particulate organic carbon and their isot…
Predicting accelerometer-based physical activity in physical education and total physical activity: The Self-determination Theory approach
2019
The present study tested the motivational model of physical education (PE) including needs for competence, autonomy, social relatedness, intrinsic and extrinsic motivation, in-class moderate to vigorous physical activity (MVPA), and total MVPA. Participants were 490 (264 girls, 226 boys) Finnish elementary school students. The data were collected using accelerometers and questionnaires for a seven-day period during the fall semester 2017. The key findings were that 1) social relatedness associated with total MVPA via in-class MVPA in girls, whereas competence was linked to in-class MVPA through extrinsic motivation in boys, 2) competence was positively linked to extrinsic motivation in a si…
A one-year follow-up of basic psychological need satisfactions in physical education and associated in-class and total physical activity
2020
This study examined basic psychological need satisfactions for competence, autonomy, and social relatedness in physical education (PE) and their contributions to accelerometer-based in-class and total moderate to vigorous physical activity (MVPA) across a one-year follow-up (T1). Participants were 523 students (girls 280, boys 243; mean age = 11.26 ± 0.31) and the data were collected using self-reports and waist-worn accelerometers. The key findings were: (a) competence and social relatedness need satisfaction at baseline (T0) predicted total MVPA at T1 via total MVPA at T0; (b) in-class MVPA at T0 predicted total MVPA at T1 via total MVPA at T0; (c) in-class MVPA was directly associated w…
Sustainable Manufacturing as Mutual Competence Building
2015
In this chapter, Sustainable Manufacturing as MCB, Halvor Holtskog, Richard Ennals, and Hans Chr Garmann Johnsen argue how sustainable manufacturing can be seen as combining the traditional manufacturing management perspective with organisational development and participatory perspectives. The definition of Sustainable Business Systems is different from other uses of sustainability. The chapter tries to link arguments for business and for education. Arguably Working Life Research has an integrative role. One might ask: how can universities be seen as sustainable work systems, and how can they develop an account of empowerment?
Propuesta de un método de evaluación del patrimonio cultural y su aplicación en Cortes de Pallás (Valencia)
2020
Las áreas rurales han experimentado significativas transformaciones socioeconómicas en las últimas décadas, en las cuales ha sido común la competencia de los ámbitos urbanos. Actualmente constituyen espacios multifuncionales caracterizados por el desempeño de nuevas actividades, donde el patrimonio se configura como un recurso esencial en las estrategias de desarrollo territorial (local). No obstante, el diseño de proyectos de valorización requiere la identificación del valor de cada bien. El propósito del estudio es la propuesta de un método de evaluación del patrimonio cultural, conformado por tres sistemas específicos que permiten cuantificar el interés patrimonial de los bienes inmueble…
French firms’ strategies for protecting their intellectual property
2012
In attempting to protect their innovations, firms can choose from a range of mechanisms, which may be either non-statutory (trade secrets, design complexity, and lead-time advantage over competitors) or statutory (patent, design registration, trademark, copyright). Yet, little is known about how firms do actually make their choices from among these different appropriability mechanisms. The aim of this paper is to determine how French firms’ use of intellectual property protection mechanisms relates to the type of innovation, the characteristics of the market sector in which they operate, the firms’ characteristics, and their human resources strategies. Our empirical model draws on four Fren…
Trandix: Herramienta Proactiva para la Búsqueda Terminológica del Traductor y su Evaluación
2014
This article is the English version of “Trandix: herramienta proactiva para la búsqueda terminológica del traductor y su evaluación” by Isabel Durán Muñoz & Alejandro Fernández Sola. It was not published on the print version of MonTI for reasons of space. The online version of MonTI does not suffer from these limitations, and this is our way of promoting plurilingualism. This paper analyses current trends in the terminological field and translators’ needs regarding terminological resources. In this context, it presents the Trandix tool, a novel software application that intends to enhance efficiency in terminological searches conducted by translators. In addition to its main features, this …