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El embalse de las Tres Gargantas ha comenzado a desempeñar un papel integral en la generación de energía, el control de inundaciones, el transporte marítimo y otros aspectos desde el 1° de junio de 2003. Utilizando datos de escorrentía y transporte de sedimentos de series temporales largas, la evolución de la relación del lago Dongting y las tres desembocaduras del río Jingjiang después de la operación de las Tres Gargantas, el proyecto se analizó utilizando redes neuronales de propagación posterior, prueba de tendencia de Mann-Kendall y curvas acumulativas dobles. Los resultados muestran lo siguiente: 1) a escala interanual e interdecadal, la disminución de la escorrentía del lago Dongting se debe principalmente a la fuerte disminución de la escorrentía de las tres desembocaduras; hasta cierto punto, la sedimentación del lago Dongting se alivió debido a la reducción del transporte de sedimentos procedentes de las tres desembocaduras; 2) al analizar la consistencia de la escorrentía y el transporte de sedimentos dentro y fuera del lago Dongting, se encontró que la influencia de la ingeniería hidráulica en el río Yangtze en la escorrentía, y el sedimento que entra y sale del lago Dongting es asincrónico; la tasa de descomposición del sedimento en el lago es mucho mayor que la tasa de descomposición del sedimento fuera del lago; 3) a partir del cambio de tendencia de los días secos de las tres desembocaduras, éstas tienden a estar sedimentadas, y los ríos Ouchi y Hudu disminuyen gradualmente; 4) desde la línea de proceso de sedimentación del lago Dongting, la sedimentación acumulada del lago Dongting desde 2003 hasta 2018 fue de -2 829 × 104 t, y el lago Dongting cambió de estado de sedimentación a estado de erosión; 5) se utilizó un modelo de red neuronal de propagación trasera para simular la escorrentía y el transporte de sedimentos del lago Dongting, y los resultados muestran que la precisión de la simulación satisfizo las necesidades de predicción de la escorrentía y el transporte de sedimentos del lago Dongting.

Abstract The biomechanical characteristics of runs in firefighters with different rescue tasks are unclear. This study aimed to explore the biomechanical characteristics of firefighters running in different rescue tasks and provide theoretical and practical references for firefighter training and occupational injury prevention. Eighteen professional healthy male firefighters were randomly selected as participants and tested running on different rescue tasks: wearing firefighting protective clothing (FPC), FPC+carrying a gas can (20 kg, FPC+ C), and FPC+carrying a mannequin (60 kg, FPC+M). Eight Qualisys infrared cameras and an AMTI 3D force measurement platform were used for the participant's acquisition of lower limb kinematic/kinetic data. The results showed that gait velocity and stride length of the FPC+GC and FPC+ M rescue tasks were significantly decreased compared to the FPC rescue task, while the support time was significantly increased. Compared to the FPC rescue task, the FPC+GC rescue task showed significant decreases in vertical ground reaction force (vGRF), minimum ankle dorsiflexion angle, and the maximum ankle plantarflexion power. In contrast, the FPC+M rescue task demonstrated significant increases in ankle range of motion, maximum hip extension angle, minimum knee flexion angle, maximum ankle dorsiflexion angle, maximum hip extension moment, maximum knee flexion moment, maximum hip flexion power, and hip and knee stiffness while exhibiting significant decreases in minimum ankle dorsiflexion angle. Compared to the FPC+ GC rescue task, the FPC+M rescue task exhibited significant increases in the maximum hip extension angle, minimum knee flexion angle, maximum ankle dorsiflexion angle, maximum hip flexion moment, maximum hip extension moment, maximum knee flexion moment, maximum ankle plantarflexion moment, maximum hip flexion power, maximum ankle dorsiflexion power, hip stiffness, and vGRF. Conversely, it showed significant decreases in the maximum knee flexion power. In conclusion, compared to the FPC rescue task, the FPC+GC and FPC+M rescue tasks altered the firefighter's gait performance, as evidenced by decreased gait velocity and stride length and increased support time. FPC+M rescue task would increase firefighter's risk of hip and knee injuries. Therefore, we suggest firefighters increase their strength training of the trunk, hip, and knee joint muscles as part of their daily training programs under large weight load status (60 kg and above) to reduce injury risk during rescue tasks.

Copyright of Tecnología y Ciencias del Agua is the property of Instituto Mexicano de Tecnologia del Agua (IMTA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study was conducted to explore the potential benefits of interview activities in improving the speaking skills of EFL students. As EFL students often require additional support to improve their speaking skills, the authors adopted a quasi-experimental approach involving pre-and post-tests to analyze the effectiveness of this intervention. Participants were divided into two groups - an experimental and a control group - with the former undergoing a pre-test, treatment session, and post-test. At the same time, the latter only received pre- and post-tests. The study evaluated various speaking skills, including fluency, grammar, vocabulary, pronunciation, and comprehension. The results indicated that the intervention positively impacted the experimental group's speaking skills, with their improvement significantly higher than that of the control group. The interview technique effectively enhanced EFL students' speaking skills, enabling them to participate more actively in learning activities and boosting their confidence when communicating in English. The research findings provide encouraging possibilities for individuals who aim to improve their oral communication abilities, paving the way for them to achieve greater academic and professional success. With these insights, learners can confidently sharpen their speaking skills and effectively communicate their ideas, opinions, and perspectives, which can positively impact their personal growth and career advancement. [ABSTRACT FROM AUTHOR]

Using biased, hostile, and malicious language towards an individual or group of individuals due to their perceived innate characteristics is known as hate speech. It can cause harm to individuals, communities, and societies. In order to gain a better understanding of the prevalence and characteristics of hate speech within academic environments, we conducted a detailed survey of 79 carefully selected students. The survey was designed to determine the most frequently occurring types of hate speech, identify where these incidents commonly occur, and show whether or not students have personally experienced such instances. This study provides a comprehensive understanding of hate speech in educational settings. The findings revealed that a vast majority of the respondents had been exposed to hate speech, albeit unknowingly. However, a small percentage of the participants had not encountered any form of hate speech. These results highlight students' need for better education and awareness regarding the various forms of hate speech and where they can manifest. It is important for students always to be aware and knowledgeable about how to handle hateful speech and promote a culture of acceptance and kindness. This way, everyone can feel secure and comfortable in their surroundings and have the opportunity to flourish. [ABSTRACT FROM AUTHOR]

Copyright of Revista Brasileira de Medicina do Esporte is the property of Redprint Editora Ltda. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)