Algunas dificultades en torno a la conservación de la energía

The subject of energy is a very important part of a physics course, as it provides a clear link between the different sections of physics. In this paper we analyze the teaching and learning of energy at secondary level and we show that traditional methods to teach energy: a) do not consider students misconceptions, b) introduce energy conservation in mechanics and thermodynamics but do not clarify if it is a theorem or a principle, and c) do not present the conservation of energy as a general principle of the whole physics. Finally, a new approach to energy teaching is showed

El papel de las ciencias en la enseñanza secundaria: Un análisis sobre los cuatro años de experimentación

Muchas veces las investigaciones en didáctica de las ciencias se centran, como es lógico por exigencias de especialización y rigor, en problemas limitados; con ello, parece olvidarse que algunos de dichos problemas se originan en características propias de un determinado sistema educativo. Por ello, parece conveniente realizar un análisis de algunas de las nuevas características de la enseñanza de las ciencias en el nuevo sistema educativo una vez concluido el proceso de experimentación de los cuatro cursos de la enseñanza secundaria obligatoria (ESO) y del primer curso de bachillerato en diversas comunidades autónomas así como en el territorio del Ministerio de Educación y Ciencia (MEC)

Dificultades de aprendizaje y cambio conceptual, procedimental y axiológico (II): nuevas perspectivas

En este trabajo veremos como las ciencias cognitivas, las neurociencias, los estudios CTS, la educación científica no formal, etc., ofrecen nuevas posibilidades de avance en el campo del aprendizaje de conceptos, procedimientos y actitudes, y también veremos otras perspectivas que amplían el dominio usual de la didáctica de las ciencias. Por último, se muestra cómo los modelos de enseñanza deben tener en cuenta estas dimensiones del aprendizaje de las ciencias, para contribuir a la solución de los nuevos problemas que se plantean sobre la educación científica.Palabras clave: ciencias cognitivas; neurociencias; estudios CTSA; enseñanza, aprendizaje.Learning difficulties and conceptual, methodological and axiological change (II): news perspectivesIn this work we will see how the cognitive sciences, the neurosciences, the STS studies, the informal scientific education, etc., offer new possibilities of advance in the field of the concepts, procedures and attitudes learning and we will also see other perspectives that enlarge the usual domain of sciences education. Finally, it is shown how teaching models should have into account these dimensions of sciences learning, to contribute to the solution of the new problems about science education.Key words: cognitive sciences; neurosciences; STS studies; teaching & learning

Dificultades de aprendizaje y cambio conceptual, procedimental y axiológico (I): resumen del camino avanzado

El trabajo se inicia mostrando la relación que se estableció entre la filosofía de la ciencia, la psicología del aprendizaje y la didáctica de las ciencias, que lleva a la consolidación de ésta, en particular, con los estudios de las concepciones alternativas. Pero las dificultades de los estudiantes no pueden reducirse a las concepciones alternativas. Por eso es conveniente ampliar el concepto de dificultades de aprendizaje e incluir dificultades debidas al razonamiento de ‘sentido común’, a las actitudes negativas de los estudiantes, etc. En consecuencia, un cambio exclusivamente conceptual no tiene en cuenta estas nuevas dificultades y son necesarios otros cambios. Pero sobre ellos existe bastante confusión terminológica que intentamos aclarar.Palabras clave: dificultades de aprendizaje; cambio conceptual; procedimental y axiológico.Learning difficulties and conceptual, methodological and axiological change (I)The work begins showing the relation that was settled down among the philosophy of the science, the psychology of the learning and the didactics of the sciences, that takes to the consolidation of the this one, in particular, with the studies of the alternative conceptions. But the students’ difficulties can’t be reduced to the alternative conceptions. For that reason the concept of learning difficulties should be extended and difficulties owed to the reasoning of common sense should be included in that concept, as well as the negative attitudes of students. Consequently, an exclusively conceptual change doesn’t take into account these new difficulties and so, other types of changes are necessaries. But there is some terminological misunderstanding about the changes that we try to clarify in this article.Key words: learning difficulties; conceptual; methodological and axiological change

Una actividad ctsa que favorece que el alumnado hable de ciencia : ¿hay fraude en las ciencias?

En esta comunicación se presenta una secuencia de actividades CTSA sobre el fraude en las ciencias, experimentadas con alumnos de 4º curso de secundaria obligatoria y 1º de bachillerato. Se investigan los resultados de la misma con una metodología cualitativa mediante grabación en audio, para analizar si se ha mejorado la comprensión de la ciencia, de su funcionamiento y sus valores, así como el interés por la misma

Errores conceptuales en los modelos atómicos cuánticos

SUMMARY We analyze how the basic concepts about atomic models are introduced into the Spanish educational system. We considered the textbooks most currently used in the educational levels from 8th EGB to the 1st University level. We finally discuss the possible sources of misconceptions

Implicaciones de la evolución histórica de algunos conceptos en la enseñanza de la relatividad

La relatividad es una parte importante de la física moderna. En este artículo se analiza el debate en torno a la utilización de la historia de la ciencia para orientar la didáctica de la relatividad en la enseñanza secundaria. Se repasa la evolución histórica de algunos conceptos clave de la relatividad especial y se muestra su implicación en la enseñanza-aprendizaje.Palabras clave: enseñanza-aprendizaje; relatividad; historia de la ciencia.Implications of the historical evolution of some concepts in the teaching of relativityThe relativity is an important part the modern physics. In this article we analyze the discussion around the use of the history of science to guide the didactics of the relativity in the secondary education. It is reviewed the historical evolution of some key concepts of the special relativity and it is shown its implication in the teaching and learning.Key words: teaching and learning, relativity, history of science

Algunas consideraciones sobre la masa (o masa no hay más que una)

This article presents sorne reasoned arguments against relativistic mass as a basic concept in Theory of Special Relativity. Relativistic mass limitations are examined and invariant mass is defended as the only one. Finally, a didactic proposal, consistent with the use of invariable mass, is presented in order to introducing rnass and energy concepts at Bachillerato

A Network Algorithm for 3D/2D IPTV Distribution using WiMAX and WLAN Technologies

The final publication is available at link.springer.comThe appearance of new broadband wireless technologies jointly with the ability to offer enough quality of service to provide IPTV over them, have made possible the mobility and ubiquity of any type of device to access the IPTV network. The minimum bandwidth required in the access network to provide appropriate quality 3D/2D IPTV services jointly with the need to guarantee the Quality of Experience (QoE) to the end user, makes the need of algorithms that should be able to combine different wireless standards and technologies. In this paper, we propose a network algorithm that manages the IPTV access network and decides which type of wireless technology the customers should connect with when using multiband devices, depending on the requirements of the IPTV client device, the available networks, and some network parameters (such as the number of loss packets and packet delay), to provide the maximum QoE to the customer. The measurements taken in a real environment from several wireless networks allow us to know the performance of the proposed system when it selects each one of them. The measurements taken from a test bench demonstrate the success of our system.This work has been partially supported by the Polytechnic University of Valencia, though the PAID-15-10 multidisciplinary projects, by the Instituto de Telecomunicacoes, Next Generation Networks and Applications Group (NetGNA), Portugal, and by National Funding from the FCT - Fundacao para a Ciencia e a Tecnologia through the PEst-OE/EEI/LA0008/2011 Project.Lloret, J.; Cánovas Solbes, A.; Rodrigues, JJPC.; Lin, K. (2013). A Network Algorithm for 3D/2D IPTV Distribution using WiMAX and WLAN Technologies. Multimedia Tools and Applications. 67(1):7-30. https://doi.org/10.1007/s11042-011-0929-4S730671Abukharis S, MacKenzie R, Farrell TO (2009) Improving QoS of Video Transmitted Over 802.11 WLANs Using Frame Aggregation. 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Teaching energy conservation as a unifying principle in physics

In this work we present the design and assessment of a teaching sequence aimed at introducing the principle of energy conservation at post-compulsory secondary school level (16-18 year olds). The proposal is based on the result of research into teaching-learning difficulties and on the analysis of the physics framework. Evidence is shown that this teaching sequence, together with the methodology used in the classroom, may result in students having a better grasp of the principle of energy conservation. Keywords Physics education · Energy conceptions · Teaching activitie