Search results for "LET"
showing 10 items of 23489 documents
La seda: el hilo conductor de un itinerario cultural. Proyecto de implantación de la Ruta de la Seda en la provincia de Valencia.
2015
Las rutas culturales se están convirtiendo en poderosos recursos para activar y difundir un conjunto de bienes patrimoniales de muy diverso tipo, geográficamente distribuidos, de acuerdo a un argumento temático fundamentado de manera adecuada. El presente trabajo desarrolla el proyecto para implantar y poner en marcha una ruta cultural en torno a la seda en la provincia de Valencia. Su capital y su área de influencia (muchos municipios y comarcas cercanas) se configuraron, durante siglos, como el centro serícola por excelencia en la península ibérica, lo que dejó su impronta en la cultura material e inmaterial del territorio. En la actualidad estamos asistiendo a una corriente de recuperaci…
Time domain symmetry parameters analysis for series arc fault detection
2022
This paper presents a feasibility study of exploiting the symmetry of some parameters for series arc fault detection in electrical circuits. The considered parameters are defined in the time domain and they are based on the current signal derivative and the evaluation of cross-correlation between subsequent observation windows. The analysis is carried out for AC systems, starting from an experimental characterization, which has been carried out in accordance with the Standard UL 1699 requirements for "unwanted tripping tests"and "operation inhibition tests"of arc fault circuit interrupters (AFCIs). The results obtained in different load conditions show that the proposed parameters can be us…
Performance Improvement of Grid-Integrated Doubly Fed Induction Generator under Asymmetrical and Symmetrical Faults
2023
The doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) suffers from voltage and frequency fluctuations due to the stochastic nature of wind speed as well as nonlinear loads. Moreover, the high penetration of wind energy into the power grid is a challenge for its smooth operation. Hence, symmetrical faults are most intense, inflicting the stator winding to low voltage, disturbing the low-voltage ride-through (LVRT) functionality of a DFIG. The vector control strategy with proportional–integral (PI) controllers was used to control rotor-side converter (RSC) and grid-side converter (GSC) parameters. During a symmetrical fault, however, a series grid-side converter…
Autonomie locali e politiche pubbliche per l’economia digitale
2019
La rivoluzione digitale ha causato in questi anni un significativo disalli- neamento tra chi subisce le conseguenze delle nuove forme economiche e la distribuzione delle responsabilità regolative tra i diversi attori. Il risultato è che le città sono le più colpite dai cambiamenti in atto, ma non sempre hanno strumenti adeguati a fronteggiare le novità e interpretarle secondo i propri bisogni e necessità. A partire da queste premesse, il presente lavoro analizza l’impatto delle tecnologie digitali sul tessuto socio-economico delle città e ragiona sulle contrapposte esigenze di politiche ritagliate sulle spe- cificità locali e, al contempo, di regole omogenee per il mercato. Su questa inelim…
CCDC 1400855: Experimental Crystal Structure Determination
2015
Related Article: Maciej Bujak, Walter Frank|2014|Z.Kristallogr.-New Cryst.Struct.|229|147|doi:10.1515/ncrs-2014-0083
Il rischio da sovraccarico biomeccanico dell'arto superiore: analisi di prevalenza delle WMDS nelle aziende agricole del settore vitivinicolo e nel s…
2012
COVID-19 in Severe Asthma Network in Italy (SANI) patients: Clinical features, impact of comorbidities and treatments
2020
To the Editor Since the end of February 2020 Italy, first non- Asian Country, has reported an ever increasing number of COronaVIrus Disease 19 (COVID-19) patients, which has reached over 200,000 confirmed Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV-2) infected subjects and resulted in more than 34000 deaths (data updated to June 19th, 20201).Patients with asthma are potentially more severely affected by by SARS-CoV-2 infection 2 and it is well established that respiratory viral infections are associated with severe adverse outcomes in patients with asthma, including increased risk of asthma exacerbation episodes 3. Nonetheless, according to the epidemiological studies publishe…
Over - And Understatements In Bishop Czaja’s Pastoral Letter To His Diocesans
2020
The Catholic Church is the largest religious faction in Poland, the country being organisationally divided into church dioceses governed by bishops. The letter by the bishop of Opole, Andrzej Czaja may be read in more than one way. One of them is the bona fide (i.e., good faith) one, the reading which assumes his sincerity, presumably the one that had been intended by the author for his diocesans to use. The other is less cooperative and sees some cases of over- and understatements in the text. This can be linguistically studied using the pragmatic theories of H.P. Grice and G.N. Leech. The present paper addresses both these readings as they fit into a global picture. Every lay person is to…
The importance of association between sexsteroids deficiency, reduction of bone mineral density and falling risk in men with implications in medical …
2021
Introduction. Endocrino-metabolic rehabilitation represent one of the most complex sector in clinical medicine, regarding functional rehabilitation. Sex hormones deficiency plays an important role in the etiology of osteoporosis in men. At the same time, with age, the trophic role of androgens on muscle decreases and determines an increased frequency of falls. The objective of our study is to determine the association between sexsteroids deficiency, reduction of bone mineral density (BMD) and falling risk in men. Methods. Our retrospective cross-sectional study included 146 men aged between 65–85 years with low BMD (study group) and 121 men with normal BMD (control group). The measurement o…