Search results for "570"
showing 10 items of 1074 documents
Adaptive Control Design for Underactuated Cranes With Guaranteed Transient Performance: Theoretical Design and Experimental Verification
2022
For antiswing control of underactuated cranes, how to guarantee the converging speed of cranes through control design is essential but still remains unsolved. In this paper, the adaptive antiswing control for underactuated gantry cranes with guaranteed transient performance under unmodeled dynamics and external disturbances is investigated. To sovle this problem, a set of filters are proposed to make the backstepping technique applicable for the control of crane systems. Then through variable transformation the position error and swing angel could be guaranteed converging to the origin with a given exponential speed. Hardware experiments are conducted to show that the proposed scheme achiev…
Developing a Tool Point Control Scheme for a Hydraulic Crane Using Interactive Real-time Dynamic Simulation
2010
This paper describes the implementation of an interactive real-time dynamic simulation model of a hydraulic crane. The user input to the model is given continuously via joystick and output is presented continuously in a 3D animation. Using this simulation model, a tool point control scheme is developed for the specific crane, considering the saturation phenomena of the system and practical implementation. This paper describes the implementation of an interactive real-time dynamic simulation model of a hydraulic crane. The user input to the model is given continuously via joystick and output is presented continuously in a 3D animation. Using this simulation model, a tool point control scheme…
Health-Related Behaviors Among School-Aged Children and Adolescents During the Spanish Covid-19 Confinement
2020
In response to the coronavirus disease 2019 (Covid-19) world pandemic, affected countries such as Spain enacted measures comprising compulsory confinement as well as restrictions regarding free movement. Such measures likely influence children's and adolescents' lifestyles. Our study aimed to investigate the impact that the Covid-19 confinement has on health-related behaviors (HRBs) among Spanish children and adolescents. An online survey was administered to 516 parents to collect data about 860 children and adolescents (49.2% girls) aged between 3 and 16 years in relation to physical activity, screen exposure, sleep time, and fruit and vegetable consumption during the Covid-19 confinement.…
International Study of Asthma and Allergies in Childhood (ISAAC) fase II: metodología y resultados de participación en España
2001
Antecedentes: La fase I del ISAAC ha proporcionado información muy valiosa sobre la prevalencia mundial de asma y alergia en la infancia. Objetivos: Describir la puesta en marcha de la fase II del estudio y la participación de niños normales en cada una de las pruebas que se realizan, en las cuatro ciudades participantes en España, y establecer en Cartagena, qué influencia puede tener el tipo de colegio o la localización (área contaminada o no). Métodos: En su fase II, el ISAAC incluye cuestionario de síntomas y de factores de riesgo y tratamiento, examen de piel, prick-test cutáneo, prueba de provocación bronquial, determinación de inmunoglobulina E (IgE) total y específica, y medición de …
Half a century of Anales de Pediatría. Evolution of its main bibliometric indicators in the Web of Science and Scopus international databases
2019
Purpose: To analyze the coverage and main bibliometric indicators of Anales de Pediatría in Scopus and Science Citation Index Expanded of the Web of Science (SCIE) databases. Material and method: The evolution of the journal production was identified according to the document types, collaboration indexes between authors and institutions, and citations, and impact indicators (number of citations, impact factor, 5-years impact factor and without self-citations, Scimago Journal Rank, quartile, h-index and most cited works). Results: A total of 10,128 papers were included in Scopus (a mean of around 225 per year) and 1861 in SCIE (a mean of around 207 per year). The index of collaboration was 4…
Half a century of ANALES DE PEDIATRÍA. Evolution of its main bibliometric indicators in the Web of Science and Scopus international databases
2019
© 2019 Asociación Espanola de Pediatría.
Partial Methylation at Am100 in 18S rRNA of Baker's Yeast Reveals Ribosome Heterogeneity on the Level of Eukaryotic rRNA Modification
2014
Ribosome heterogeneity is of increasing biological significance and several examples have been described for multicellular and single cells organisms. In here we show for the first time a variation in ribose methylation within the 18S rRNA of Saccharomyces cerevisiae. Using RNA-cleaving DNAzymes, we could specifically demonstrate that a significant amount of S. cerevisiae ribosomes are not methylated at 2'-O-ribose of A100 residue in the 18S rRNA. Furthermore, using LC-UV-MS/MS of a respective 18S rRNA fragment, we could not only corroborate the partial methylation at A100, but could also quantify the methylated versus non-methylated A100 residue. Here, we exhibit that only 68% of A100 in t…
Coautoría y redes de colaboración científica de la pediatría española (2006-2010)
2013
Resumen: Introducción: La colaboración científica es un aspecto de gran relevancia pues se sitúa en la base del desarrollo científico de cualquier disciplina. El objetivo de este trabajo es identificar los indicadores de colaboración científica y las redes de coautoría de los investigadores e instituciones españolas que publican en revistas pediátricas nacionales y extranjeras y en revistas multidisciplinares o de otras disciplinas o áreas del conocimiento durante el quinquenio 2006-2010. Método: Los trabajos objeto de estudio se han obtenido de las bases de datos Science Citation Index Expanded, Scopus, Índice Médico Español e Índice Bibliográfico Español en Ciencias de la Salud, aplicando…
Investigación pediátrica española financiada: contribución de Anales de Pediatría a su difusión
2017
Resumen: Objetivo: Identificar la investigación pediátrica española financiada publicada en revistas generales pediátricas incluidas en la WoS (2010-2014) y la de Anales de Pediatría (AP). Explorar la relación de la financiación con el prestigio de las revistas y describir sus condiciones para cumplir los mandatos de acceso abierto. Material y método: La financiación de los artículos publicados en revistas pediátricas generales se identificó utilizando el campo Agencia Financiadora de la WoS y revisando el documento original para AP. Para AP se identificaron las entidades financiadoras de los AF y se valoró la diferencia en la citación de los AF y los no financiados mediante test no paramét…
Impacto científico y contextualización bibliométrica de la Pediatría respecto a otras áreas temáticas
2020
[EN]: [Introduction] The purpose of this paper is twofold. On the one hand, to identify and characterise the indicators of production, citation, impact and collaboration of the Pediatrics area of the Journal Citation Reports, and on the other, to place the journal Anales de Pediatría in the context of the Spanish journals of another twenty areas and medical specialties. [Material and Method] The sources of information used to obtain the indicators were Science Citation Index- Expanded, Journal Citation Reports and Scimago Journal & Country Rank. A regression analysis was performed to check the correlation between the citation and other variables. [Results] Pediatrics ranked 8th in scientifi…