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741.
742.
    
It is well known that a fractional-order system with a continuous right hand side does not have finite-time stable equilibria, but the discontinuous case has remained elusive in literature. Thus, based on novel mathematical tools, recently published in literature, it is demonstrated that attaining finite-time stable equilibria is not possible for a fractional-order system, not even in the case of an impulsive or discontinuous feedback. In consequence, it is demonstrated that, for a fractional-order system, a Lyapunov stable equilibrium cannot be at the same time finite-time stable.  相似文献   
743.
    
This paper introduces a neural network-based model designed for classifying emotional states by leveraging multimodal physiological signals. The model utilizes data from the AMIGOS and SEED-V databases. The AMIGOS database integrates inputs from electroencephalogram (EEG), electrocardiogram (ECG), and galvanic skin response (GSR) to analyze emotional responses, while the SEED-V database continuously updates EEG signals. We implemented a sequential neural network architecture featuring two hidden layers, which underwent substantial hyperparameter tuning to achieve optimal performance. Our model’s effectiveness was tested through binary classification tasks focusing on arousal and valence, as well as a more complex four-class classification that delineates emotional quadrants for the emotional tags: happy, sad, neutral, and disgust. In these varied scenarios, the model consistently demonstrated accuracy levels ranging from 79% to 86% in the AMIGOS database and up to 97% in SEED-V. A notable aspect of our approach is the model’s ability to accurately recognize emotions without the need for extensive signal preprocessing, a common challenge in multimodal emotion analysis. This feature enhances the practical applicability of our model in real-world scenarios where rapid and efficient emotion recognition is essential.  相似文献   
744.
745.
RESUMEN

El artículo propone un programa para la enseñanza del lenguaje a niños deficientes mentales destinado al educador que trabaje en esta área. Algunos criterios básicos de actuación al elaborar el programa son la utilización progresiva del juego, la utilización del contraste y la fórmula binaria para aprender los sonidos, el uso de la asociación y la referencia constante al contexto cotidiano del niño. El programa se divide en seis niveles. El primer nivel es una iniciación al aprendizaje del lenguaje. El segundo va dirigido a niños capaces de reconocer y nombrar algunos objetos y con un nivel mínimo de comprensión. Los niños del tercer nivel utilizan más vocabulario y reconocen e identifican imágenes de los objetos. En el cuarto nivel se trabaja con niños que utilizan la frase simple y tienen integrada la comprensión de la imagen pura. El quinto nivel se dirige a niños con cierta capacidad de comunicación, aunque con agramatismo. Por último los niños del sexto nivel comienzan a trabajar en la lectoescritura.  相似文献   
746.
Resumen

Las autoras tratan de probar la eficacia de los «juegos de simulación» en la enseñanza de la Geografía en la EGB. Para ello realizan la adaptación de un juego aplicándolo a los niveles escolares de 5.° y 7.°, y comparan los resultados de los grupos experimentales con otros de control. Las conclusiones a que llegan se basan en cuatro tipos de pruebas: de memoria, de razonamiento, de aplicación y de valoración del juego. Los resultados obtenidos muestran que estas actividades dan mejores resultados en 7.° que en 5.° y favorecen principalmente a los sujetos menos dotados que ven aumentados sensiblemente sus rendimientos.  相似文献   
747.
748.
    
Rapidly becoming the largest ethnic group of American students, compared to White students with disabilities, Latino students with disabilities receive less services and their parents are more likely to struggle to receive services. Yet, it is unclear how Latino families advocate for their children with disabilities including how cultural values facilitate their advocacy efforts. In this study, four focus groups were conducted with 46 Latino parents of children with autism spectrum disorder. Parents reported advocating by being assertive but not aggressive, being involved in school activities, communicating with the school and documenting the communication, and relying on knowledge and faith. Parents also reported facilitators (i.e., knowledge and resources, increased parent-school communication, and greater peer support) and barriers (i.e., poor school experiences, school related-stress, and stigma and discrimination) to advocacy. Implications for research, policy, and practice are discussed.  相似文献   
749.
The present study explored the effects of three different activity conditions on three attentional functions: alerting, orienting, and executive control. A group of highly experienced cyclists performed the Attention Network Test-Interactions (Callejas, Lupiá?ez, & Tudela, 2004) at rest, during moderate aerobic exercise, and during intense aerobic exercise. Results indicated that aerobic exercise accelerated reaction time and reduced the alerting effect compared with the rest condition. However, aerobic exercise did not modulate the functioning of either the orienting or the executive control attentional networks. No differences in reaction time or attentional functioning were observed between the two aerobic exercise workloads. The present results suggest that moderate aerobic exercise modulates the functioning of phasic alertness by increasing the general state of tonic vigilance.  相似文献   
750.
Purpose: The talent identification and selection process in young male soccer players is mainly focused on anthropometrics and physical performance, but social factors are also considered in this process. The purpose of this study was to test the existence of the relative age effect and its possible influence on anthropometrics and physical performance and to analyze coaches’ efficacy expectations. Method: Data for 564 young male soccer players (Mage = 13.7 ± 1.5 years; Mweight = 53.7 ± 11.6 kg; Mheight = 160.2 ± 11.6 cm) included their birth quartile, maturity status, anthropometrics, a physical test battery, and coaches’ efficacy expectations. Results: Early-born players were overrepresented (< .05). Early-born players were not statistically taller, heavier, or better at physical performance (> .05) when maturation and chronological age were controlled as confounding factors. However, coaches expected more from early-born players (< .05), and the inferential analysis showed likely to very likely worthwhile differences between the coaches’ expectations for players born in the first quartile of the year and those born in the fourth quartile of the year. Conclusions: Anthropometrical and physical performance variables were not affected by birth quartile, and coaches’ efficacy expectations were related to the relative age effect.  相似文献   
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