Metodología de la Historia en las enseñanzas medias.

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Situación de la escuela primaria en Madrid durante la Segunda República. La acción socialista en el ayuntamiento (1931 - 1933).

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This corner of Canaan: curriculum studies of place and the reconstruction of the South

If place is crucial to understanding the self and society, then it is central to curriculum studies that relate the individual and the social. This theoretical autobiographical research seeks to encourage progressive conversation and social political movement in the South by attending to the anomalous forms of Southernness that emerge in the interrogation of feeling Southern. Toward that end, in this dissertation I explore and foreground a marginalized Southern curriculum of nostalgia, homeplace, grace, and queerness. I investigate aspects of Southern place and feeling Southern that are submerged in conventional white patriarchal notions of Southern identity. My narrative allows some of these anomalous forms of Southernness to surface and, out of these forms, create a Southern curriculum of place. This work is necessary for displacing the dominant, race-, class-, and gender-constricting conception of Southernness that perpetuates itself. The politics of place inform individual and collective Southern identities. As examining Southern place and conventional traits of Southern identity reveal a greater complexity to feeling Southern, attending to anomalous forms of Southernness creates conversation about the progressive transformation of Southern place. The forms of Southernness for which I have created curricular forum are as follows: 1) unsettling prohibitive nostalgia so as to disrupt rather than solidify identity/place norms; 2) homeplace as a site for the interrogation of the construction of identity rather than the consoling, pacifying mirror of identity 3) queer Southernness, exemplified in the conjunction rather than the opposition of fundamentalism and queer desire; 4) grace that shatters rather than absolves traditional raced, classed, and gendered notions of Southern identity. This study elaborates a curriculum of Southern place; the study is a journey of self—a self situated squarely in Southern place and the raced, classed, gendered, religious sensibilities of the place. In relation to place and self, this research uncovers sites of subjective and social transformation within the American South. Transformation is not a destination, but is itself a passage, forward motion that requires a continuing disruption of traditional Southern codes that leave the South with nostalgia, guilt, and pain

Dynamic earth pressures against a retaining wall caused by Rayleigh waves

An approximate procedure for studying harmonic soil-structure interaction problems is presented. The presence of Rayleigh waves is considered and the resulting governing equations of the dynamic soil-structure system are solved in the time domain. With this method the transient and steady states of a vibratory motion and also the nonlinear behaviour of the soil can be studied. As an example, the dynamic earth pressure against a rigid retaining wall is investigated. The loads are assumed to be harmonic Rayleigh waves with both static and dynamic surface surcharges. The dependence of the results on the excitation frequency is shown

Seismic earth thrust against massive building walls

The problem of earth thrust for a massive building in a seismic environment is analysed. Intertial and kinematic soil-structure interactions are considered by modelling the soil and the structure together. The problem is solved in the frequency domain by using the computer code FLUSH. Results show that the horizontal component of the seismic earth thrust is much greater than that obtained when applying the Mononobe-Okabe theory. This study establishes a set of conclusicns and recommendations for both design and practical purposes, and proposes future lines of investigation

Los efectos de borde en problemas geotécnicos estáticos analizados por el M.E.F

En el presente artículo se plantea el problema de las condiciones de borde que deben ser consideradas, para los límites laterales de un modelo de elementos finitos, en el caso de que se pretenda analizar un problema geotécnico en condiciones estáticas. Partiendo de las soluciones existentes para el caso de problemas dinámicos de interacción suelo-estructura, los autores demuestran que puede deducirse un nuevo borde aplicable a las condiciones estáticas. Dicho borde se materializa en una matriz de rigidez que interrelaciona entre sí todos los nudos del lado que se considera. La bondad de la solución propuesta, así como la correspondiente a otras condiciones de borde, es estudiada en un problema concreto que dispone de una solución, estableciéndose unas conclusiones particulares respecto al comportamiento de las diferentes condiciones de borde analizadas

Analytical modelling of metallic circular plates subjected to impulsive loads

14 pages, 15 figures.This paper presents an analytical approach to the dynamic response of metallic circular plates subjected to impulsive loads. It is based on the plate energy balance equation and assumes that the plate material behaves viscoplastically. The proposed method permits a consideration of the influence of the different terms of the kinetic energy and the plastic work of the plate. A yield criterion is proposed, which involves the coupled effect of the radial and circumferential internal force resultants. By applying the normality rule, the distribution of the bending moments and membrane forces inside the plate are computed. For model validation, its analytical predictions are compared with experimental results.The authors are indebted to the Comunidad Autónoma de Madrid for the financial support of this work (project 07N/0004/1998).Publicad

Metodología de la Historia en las enseñanzas medias.

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An engineering model on penetration of eroding rods into ceramic/polymer composite

6 pages, 3 figures.-- Issue title: "EURODYMAT 2003 - 7th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading" (Porto, Portugal, Sep 8-10, 2003).A new material composed of a polymer matrix loaded with ceramic partiales, at low cost and of higher ballistic efficiency than that of the metallic materials used for armouring applications, is proposed as an alternative to the ceramic tiles traditionally adopted for mixed panels. An engineering model was developed to simulate normal impacts of projectiles against this particulate composite backed by a metallic plate. The equation governing the erosion of projectile and ceramic is that proposed by Tate and Alekseevskii, modifie to consider a moving target. For the volume of particulate composite between the projectile and the metallic plate, an equation was derived to include a momentum balance. For the metallic plate, an energy balance equation was used. When the projectile has eliminated the ceramic/polymer composite and meets the plate, the model of Awerbuch & Bodner is adopted, again modifie to consider a moving target. ln this way, the impact process is described by a set of non-linear differential equations, to be integrated in time. The model was validated with experimental results and with full numerical simulations and showed agreement with both of them.The authors are indebted to the Comunidad Autónoma de Madrid (Project 07N/0004/1998) for the financial support of this work.Publicad