1,163 research outputs found

    Globalización, funcionalidad económica y estructura urbana en Guadalajara, 1990-2000

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    Este trabajo tiene como propósito analizar las transformaciones que experimentaron la funcionalidad económica y la estructura urbana de la zona conurbada de Guadalajara (ZCG) en la última década del siglo XX, en el marco del proceso de globalización. Partimos del supuesto de que la integración de la economía de esta metrópoli a dicho fenómeno contribuye a que asuma las funciones de plataforma de exportación de la industria globalizada y de centro de distribución regional de mercancías producidas en otros países1. Buscamos hacer una aportación distinta a la “nueva geografía urbana” (Sassen 1999), en la que la ciudad global se ha convertido en el epicentro y escenario protagónico de la globalización. En este trabajo el objeto de estudio no es la ciudad global, sino una de ellas que ocupan una posición periférica y tienen una cobertura subnacional y local, como ocurre con la ZCG. Aquí evaluaremos el alcance económico y territorial de dicho fenómeno en una ciudad de la periferia económica.Peer Reviewe

    Modelos mecánicos de los materiales granulares sueltos empleados en firmes de carreteras

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    [Resumen:] En los firmes de carreteras los materiales granulares sueltos desempeñan un importante papel estructural. Esto es así porque por un lado, durante la etapa de construcción del firme soportan el tráfico de obra y proporcionan un cimiento sobre el cual las capas superiores puedan situarse y compactarse y, por otro lado, en un firme terminado actúan como amortiguadores de las cargas del tráfico. En este artículo se expone una breve descripción de algunos modelos de predicción del comportamiento resiliente de los materiales granulares bajo las cargas del tráfic

    La deformabilidad de la explanada y el análisis de firmes: 2ª parte, comprobación estructural de las secciones de la 6.1 y 6.2 I.C.

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    Este curso tuvo lugar en A Coruña, del 6 al 8 de noviembre de 2000

    Diseño de firmes mediante el empleo de modelos de predicción del comportamiento de los materiales granulares

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    Este VI congreso tivo lugar en León do 24 ao 27 de maio de 2004

    La deformabilidad de la explanada y el análisis de firmes: 1ª parte, métodos de dimensionamiento de firmes

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    Este curso tuvo lugar en A Coruña, del 6 al 8 de noviembre de 200

    Permanent deformation models for a granular material used in road pavements

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    [Abstract:] This paper analyses the permanent deformation performance of an unbound granular material that has been subjected to repeated triaxial loads. The study focuses on the evolution of the cumulative strain and includes a classification of the specimens according to the shakedown concept. This was done by fitting models that express the cumulative strain to cyclic loads and stress level. The predictions of the models were not absolutely perfect. The results with the granular material were not satisfactory enough to warrant their use in a low traffic road pavement section in Galicia (Spain)

    Teaching and Learning of Mathematics through CLIL, CBI, or EMI—A Systematic Literature Review

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    This study provides a systematic literature review of research in the field of teaching and learning mathematics through Content and Language Integrated Learning (CLIL), Content-Based Instruction (CBI), and English Medium Instruction (EMI). The review aims to examine the most relevant literature with a focus on mathematics and CLIL, CBI, or EMI in Scopus and Web of Science per the Preferred Reporting Items for Systematic Reviews (PRISMA) guidelines. Based on 151 sources, 52 papers were selected according to predefined selection criteria. The papers were analysed and coded according to the following categories: (1) geographical productivity, (2) diachronic productivity growth, (3) main objectives, (4) methodology, and research design, (5) variables and measurement instruments, (6) context and sample details, and (7) main findings. The results reveal that most of the research analysed has been carried out in the Asian continent, followed by Europe. The analysis of diachronic productivity shows that the study of the application of CLIL, CBI, and EMI programs in the teaching-learning process of mathematics has notably increased in recent years, especially in the last triennium (2020–2022). Regarding the objectives of the selected corpus, the majority aimed at teaching practices and learning processes, and outcomes in mathematics and language proficiency in CLIL, CBI, and/or EMI classrooms. The corpus analysed fits within one or more of the following categories: empirical, qualitative, descriptive, correlational, and cross-sectional. The samples utilized in different studies differ significantly, both in terms of quantity –ranging from one person to 700– and in the educational level being studied, which would be primary, secondary, or tertiary education. The main variables studied in the corpus focus on mathematical competence, language proficiency, teaching practices, teacher training, science competence, and teachers’ perceptions. The most widely used instruments have been objective tests, such as questionnaires, together with standardized tests to measure some aspects related to mathematical competence and language proficiency. They are followed by an analysis of documents (academic records, teaching materials, official documents...), participant or non-participant observation, interviews, and video and audio recordings. In summary, in the scientific literature analysed, a positive or neutral view predominates on the effects of the CLIL, CBI, and EMI approaches on the learning of mathematics and the L2. This can be due to methodological issues fundamentally related to the methodology, research design, sample, and measurement instruments. Thus, we must highlight that some of the results from the selected papers must be interpreted with caution. Taking this factor into consideration, further comparative studies on a wider scale are required to examine thoroughly the effects of CLIL, CBI, and EMI on the teaching and learning of mathematics in an L2. Besides, it is important to study in greater depth the different levels of language acquisition since the research analysed shows that these have not been sufficiently addressed in the mathematical field of knowledge
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