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Anthropometric characteristics of Brazilian jiu-jitsu athletes and their relationship with anaerobic performance
Full text link[EN] Anaerobic metabolism is crucial to Brazilian jiu-jitsu athletes (BJJ), principally during the decisive moments of the match, to perform sweeps, throws, and ground techniques. However, little is known about the association between anthropometric variables with anaerobic performance. Objectives: To describe the peak power (PP) and mean power (MP) obtained in the Wingate test by BJJ athletes, to investigate the correlations between PP and MP and anthropometric variables, and to identify the anthropometric predictors of anaerobic performance. Methods: Twenty male BJJ athletes (aged: 22.9 ± 2.3 yrs, height: 1.75 ± 0.05 m, and body mass: 75.7 ± 10.3 kg) performed a 30 s Wingate test. Anthropometric variables, body mass (BM), fat free mass (FFM), muscle mass (MM), fat mass (FM), and percentage fat mass (%FM) were measured through electric bioimpedance. Results: Absolute mean values for PP and MP were 926 ± 154 and 665 ± 110 W, respectively, whereas relative values to BM were 12.2 ± 1.3 and 8.8 ± 0.9 W.kg-1, respectively. The mean FI value was 30.0 ± 4.7%. A significant and positive correlation was observed between PP and MP with all anthropometric variables (MM, FFM, %FM, FM). FFM was the best predictor of both PP (R2 = 0.69, p = .001) and MP (R2 = 0.67, p = 0.001) in the Wingate test. Conclusions: The results of this study demonstrated that FFM was the main anthropometric variable associated with anaerobic performance in BJJ athletes. Improving FFM may be a key strategy for enhancing anaerobic performance in this population
Vehicle-to-Vehicle Secure Communication Protocol Based on Digital Vehicle Identification Number
Full text link[EN] Establishing secure vehicular communication is essential for the development of autonomous driving capabilities and to make new functionalities possible, such as smart traffic management, or systems aimed at avoiding or mitigating traffic accidents. In this scenario, where the deployment of a Public Key Infrastructure (PKI) may be difficult, the use of identity-based cryptography is proposed as a good alternative, because this approach simplifies encryption by enabling dynamic key generation and secure communication, without requiring prior key exchanges, making it highly scalable and efficient. In this way, this paper proposes a communication protocol applicable to V2V (vehicle-to-vehicle) and V2X (vehicle-to-all) communications, replacing schemes based on PKI with identity-based cryptographic schemes using the VIN (Vehicle Identification Number) as an unequivocal vehicle identifier. This paper also describes a prototype implementation in a conventional vehicle and the performance metrics of the system. Through a defined proof of concept, we obtained various quantitative results, demonstrating the importance of the processors used for the encryption and decryption operations required. The proposed system provides secure and flexible vehicle identification, with multiple practical applications. It can enables digital authentication, support toll payments without extra hardware, and facilitate V2X communication via the VIN for improved traffic management and safety. Additionally, it can streamline processes in repair workshops and optimize fuel payment and tracking at service stations.SIAdriana Súarez Corona was partially funded by the research project PID2021-123461NBC22 funded by the Spanish Ministry of Science, Innovation and Universities. Part of the development of this protocol was funded by INCIBE (The Spanish National Cybersecurity Institute) under Challenge 2 of the Pre-Commercial Public Procurement process CPP001/23, corresponding to “R&D&I” services in the field of cybersecurity (actions 1, 2, 3, 4, 5, and 7) within the framework of the Recovery and Resilience Mechanism, Component 15, Investment 7 (MRR C15.I7)
Opinions of university education students on degrowth training: A quantitative study
Full text link[EN] The ecological crisis and climate change threaten life on the planet. Degrowth is seen as the most effective
way to avoid possible eco-technological collapse and to learn to live more simply, so that others can simply
live. The training of teachers in degrowth, both initial and permanent, becomes a priority for the Higher
Education of future generations. The purpose of this research was to analyse the opinion of 348 students
of Education degrees (Bachelor and Master) regarding the ecological crisis and degrowth, and their
opinion on the need for training on these issues in Higher Education. The quantitative research
methodology was carried out using a Likert-type questionnaire with 10 closed questions, allowing for a
descriptive-interpretative and factorial analysis of the data obtained. The results show that the participants
perceive the seriousness of the ecological crisis and, although they do not have an in-depth knowledge of
the concept of degrowth, they consider that education in and for degrowth should be introduced into the
educational system in order to change the paradigm of infinite development of a finite and consumerist
planet as a form of social fulfilment and happiness. It is concluded that systematic, permanent and indepth
university teacher training on degrowth is necessary as an effective and necessary alternative to face
the current global crisis and that the questionnaire has been an appropriate instrument to find out the
students’ opinions.SIThis research has been funded by the European Project Erasmus+, Jean Monnet Module, titled “Building up an Inclusive and Democratic Europe through a Dialogical Co-Creation of Intercultural Solutions to the Rise of Neo-Fascism and Xenophobia.” Call for Proposals 2020 - EAC-A02-2019-JMO. Application No 620320-EPP-1-2020-1-ES-EPPJMO-MODULE. Duration: 3 years (2020-2023)
Docentes en formación: percepciones y emociones hacia el alumnado con necesidades educativas
No full textConference Proceedings CIVINEDU 2023. 7th International Virtual Conference on Educational Research and Innovation. September 20-21 2023. Madrid.[ES] La formación del profesorado en valores emocionales y actitudinales relacionados con la atención
del Alumnado Con Necesidades Específicas de Apoyo Educativo (ACNEAE) es importante para la
inclusión educativa. El objetivo de este estudio es analizar las emociones que sienten los docentes en
formación y las percepciones que tienen ante la atención educativa del ACNEAE en sus aulas. Han
participado 60 estudiantes de diferentes titulaciones de Educación (Máster en Formación del Profesorado
de Educación Secundaria y Bachillerato, Grado en Magisterio de Educación Primaria y Grado en
Magisterio de Educación Infantil) de la Universidad a Distancia de Madrid. Para la recogida de información
se ha elaborado un cuestionario ad hoc. Aunque los docentes prefieren evitar tener ACNEAE
en sus aulas, lo consideran una oportunidad para desarrollarse como docentes, lo que se asocia con
emociones positivas. Esta discordancia subraya la necesidad de la formación transversal en los planes
de estudio universitarios.[EN] Teacher training in emotional and attitudinal values related to the care of Pupils with Specific Educational
Support Needs (SENSE) is important for educational inclusion. The aim of this study is to analyse
the emotions that trainee teachers feel and the perceptions they have of the educational care of SENSE
in their classrooms. Sixty students from different degrees in Education (Master's Degree in Teacher
Training for Secondary Education and Baccalaureate, Degree in Primary Education Teaching and Degree
in Early Childhood Education Teaching) from the Distance University of Madrid took part in the
study. An ad hoc questionnaire was drawn up for the collection of information. Although teachers prefer
to avoid having SENAC in their classrooms, they see it as an opportunity to develop as teachers, which
is associated with positive emotions. This discordance underlines the need for transversal training in
university curricula
General training plan
No full text[EN] This twinning project is part of the extension of the reforms and approaches regarding
the dominant teaching practices in Algerian universities according to the diagnosis
established by the educational agents responsible for the fields, branches and specialities
of the three-tier degree system
Tecnología y prevención de riesgos laborales en la negociación colectiva estatal
Full text link[ES] El artículo examina la compleja relación entre tecnología y seguridad y salud laboral en la negociación colectiva, destacando diversos aspectos cruciales para la protección de los trabajadores, como son: primero, la introducción de medios digitales en el ámbito laboral, que requerirá la adopción de medidas preventivas relacionadas con la información y formación adecuada y suficiente y la consulta a los representantes legales antes de la implementación y sobre el uso adecuado de los dispositivos; segundo, el derecho a la desconexión digital y las políticas necesarias para asegurar un tiempo de descanso de calidad que permita a la persona trabajadora recuperarse del trabajo, así como conciliar, además de las acciones encaminadas a capacitar, prohibir y sancionar actitudes que pretendan la conexión permanente; tercero, la tutela de tan preciados bienes en el teletrabajo, donde los pocos convenios que la recogen incorporan cláusulas destinadas a detallar, entre otras cuestiones, las obligaciones y responsabilidades, la provisión de equipos y gastos asociados, la ergonomía del espacio de trabajo, la formación obligatoria y, como punto más controvertido, la privacidad en el domicilio; y, finalmente, el ciberacoso, donde los protocolos establecen medidas disciplinarias y pretenden la promoción de un entorno laboral seguro y saludable, adaptado a los desafíos del trabajo remoto en el contexto digital actual.[EN] The paper examines the complex relationship between technology and occupational health and safety in collective bargaining, highlighting several crucial aspects for the protection of workers. First, the introduction of digital media in the workplace, which will require the adoption of preventive measures related to adequate and sufficient information and training and consultation with legal representatives prior to implementation and on the proper use of the devices. Secondly, the right to digital disconnection and the necessary policies to ensure quality rest time to allow the worker to recover from work and to reconcile, as well as actions aimed at training, prohibiting and sanctioning attitudes that aim at permanent connection; third, the protection of such precious assets in teleworking and the protection of workers' health and safety at work. Thirdly, protection of such precious assets in teleworking, where the few agreements that do include clauses detailing, among others, obligations and responsibilities, the provision of equipment and associated costs, workspace ergonomics, mandatory training and, most controversially, privacy at home. Finally, cyberbullying, where the protocols establish disciplinary measures and aim to promote a safe and healthy working environment, adapted to the challenges of remote working in today's digital context.S
Dogs from the past: Exploring morphology in mandibles from Iberian archaeological sites using 3D geometric morphometrics
Full text link[EN] We describe the shape variability of nine dog hemimandibles recovered from two Holocene archaeological sites on the Iberian Peninsula. In this study we mainly focus on the Chalcolithic age dog remains recovered from Barrio del Castillo (Torrejón de Ardoz, Madrid), but also, make comparisons to dog specimens from El Portalón (Sierra de Atapuerca, Burgos) Bronze Age. We used geometric morphometrics (3D) to describe mandibular morphology and compared these specimens with a modern sample of Iberian wolves, dogs, and red foxes. As complete mandibles are rarely found in the archaeological record, we also analysed the variability of the shape on fragments of mandibles. Here, we examine if there is morphological variability or a continuity in size between Chalcolithic and Bronze Age dogs. A scenario of very similar dogs, with a continuity in the size, is expected in the inner regions of the peninsula in contrasts with the coastal sites (influenced by a higher commercial activity). Our results suggest a continuity in the size and morphology of M1. These dogs still conserved diagnostic wolf traits in relation to the carnassial zone. Additionally, we observe that the region behind the M1 in Chalcolithic and Bronze Age dogs is slightly different when we analysed the fragmentary mandibleSIThis work was supported by the project “Geología, geocronología y paleobiología de los yacimientos de la Sierra de Atapuerca VIII” (PID2021-122355NB-C31- FEDER/Ministerio de Ciencia e Innovación, Agencia Estatal); and by the UCM research group Ecosistemas Cuaternarios (931098). R.B-O is supported by a Fundación Atapuerca research fellowship financed by Cajaviva Fundación Caja Rural Burgo
Seguridad y salud en la era digital
No full text[ES] El texto expone el marco contextual de la digitalización del trabajo en la Industria 4.0, subrayando su impacto disruptivo sobre la organización productiva, las formas de empleo y el sistema de prevención de riesgos laborales. Se identifica una transición tecnológica impulsada por el incremento de la potencia computacional, el almacenamiento masivo de datos, la IA, la robótica colaborativa y la hiperconectividad propia de la economía de plataformas, elementos que, aunque anclados parcialmente en la revolución industrial previa, adquieren una intensidad y ubicuidad renovadas en el paradigma actual. La digitalización posibilita una adecuación casi instantánea entre oferta y demanda de trabajo y mejora la competitividad y la productividad empresarial mediante procesos más flexibles, eficientes y personalizados. Sin embargo, emergen riesgos significativos, principalmente de naturaleza psicosocial: conectividad permanente, sobrecarga, tecnoestrés y patologías asociadas (tecnoansiedad, tecnofobia, tecnoadicción), además de nuevos riesgos mecánicos y musculoesqueléticos derivados de la interacción humano-robot en espacios compartidos. Se constata la ausencia de una regulación preventiva específica y sistematizada para estos riesgos en la normativa española de prevención, que solo los aborda de forma indirecta mediante cláusulas generales sobre “equipos”, “condiciones de trabajo” o “evolución de la técnica”. Frente a ello, se proponen mejoras normativas centradas en reforzar la accesibilidad, la formación en competencias digitales, la adaptación de la jornada a las necesidades humanas (no a la lógica algorítmica o robótica) y el desarrollo de instrumentos organizativos complementarios, sin confiar exclusivamente en la negociación colectiva como vehículo idóneo para una protección efectiva. El texto también sitúa las estrategias institucionales europeas y españolas (Estrategia de Política Industrial Renovada, Planes nacionales de digitalización, programas de apoyo a pymes, y agendas de competencias digitales) como intentos de sostener la competitividad tecnológica, aunque se advierte que la 4.0 no es solo un cambio técnico, sino un fenómeno global que exige integrar ética, valores y centralidad de la persona trabajadora en la innovación y optimización de procesos
Figuraciones de la melancolía desde la monstruosidad insólita en la narrativa hispánica actual
No full text[ES] Como el título del presente texto indica, el corpus objeto de estudio del mismo se adscribe a las estéticas propias de la narrativa de lo insólito, por lo que, en primer lugar, conviene aclarar que empleo ese término de “insólito” no en su
acepción de algo raro o desacostumbrado, sino con un uso más libre con el que se hace referencia a las categorías literarias no realistas: el mito, lo maravilloso, lo fantástico, el terror y el gótico sobrenatural, lo inusual, la ciencia ficción
prospectiva, entre otras. Estas modalidades plantean una visión subversiva y una lectura crítica del mundo actual. Y uno de los motivos que más fuerza ha cobrado en ellas es el del monstruo
Reseña de: Alpesh Maisuria (Ed.), Encyclopaedia of Marxism and Education. Brill, 2022
No full text[ES] Alpesh Maisuria, profesor en la Universidad del Oeste de Inglaterra en Bristol, ha editado una obra llamada a convertirse en un auténtico punto de inflexión en la tradición académica del pensamiento marxista en educación.S