How should american students understand their civic culture? : the continuing battle over the 2002 Massachusetts history and social science curriculum framework.

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Teaching adult literacy : principles and practice.

Ofrece orientación sobre cómo trabajar con estudiantes adultos para desarrollar en ellos las habilidades en la alfabetización y en la práctica; además, supera la visión negativa de considerar a los alumnos adultos como 'problemas sociales' y con déficits de atención, pues se considera que sus aptitudes y recursos en muchos ámbitos de la vida son aprovechables en el proceso de aprendizaje. Incluye muchas teorías e investigaciones sobre la alfabetización de adultos, así como nuevas perspectivas teóricas y aplicaciones a la práctica cotidiana. Algunas de sus características son: aplicación de la teoría lingüística a la enseñanza de la alfabetización; ejemplos de escritura de estudiantes con comentario y análisis, sugerencias prácticas de enseñanza, planificación y evaluación; orientaciones para apoyar a los alumnos con dislexia y dificultades de aprendizaje global.

Adult literacy, numeracy and language : policy, practice and research.

Es un recurso para los profesionales, investigadores y estudiantes de los cursos de adultos y educación continua, para estudiantes de postgrado e investigadores en el campo de la educación post-obligatoria. Estudia la práctica social de la alfabetización, la aritmética y el lenguaje y las implicaciones de la enseñanza y el aprendizaje de las competencias básicas de los adultos. Los principales expertos internacionales propugnan un cambio en el enfoque de su definición por otra más abierta que sostiene que la alfabetización, la aritmética y el lenguaje son más que un conjunto de habilidades o técnicas, pues están determinadas por el contexto social y cultural en el que están teniendo lugar, el sentido que tienen para los usuarios, y los fines que persiguen.

Comparison of self-reported attachment in young adults from Spain and the United States

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History and uses of music education for children who are hearing impaired

This paper discusses hearing impaired children and their ability to learn and enjoy music.

Deforming glassy polystyrene: Influence of pressure, thermal history, and deformation mode on yielding and hardening

The toughness of a polymer glass is determined by the interplay of yielding, strain softening, and strain hardening. Molecular-dynamics simulations of a typical polymer glass, atactic polystyrene, under the influence of active deformation have been carried out to enlighten these processes. It is observed that the dominant interaction for the yield peak is of interchain nature and for the strain hardening of intrachain nature. A connection is made with the microscopic cage-to-cage motion. It is found that the deformation does not lead to complete erasure of the thermal history but that differences persist at large length scales. Also we find that the strain-hardening modulus increases with increasing external pressure. This new observation cannot be explained by current theories such as the one based on the entanglement picture and the inclusion of this effect will lead to an improvement in constitutive modeling.

Joint effects of density and a growth inhibitor on the life history and population growth rate of the midge Chironomus riparius

Results of previous laboratory studies suggest that high population density often buffers the effects of chemical stressors that predominately increase mortality. Mortality stressors act to release more resources for the survivors and, therefore, produce less-than-additive effects. By contrast, growth stressors are expected to have opposite results or more-than-additive effects. We investigated the effects of a growth inhibitor (lufenuron) on larval growth and survival of Chironomus riparius and examined its joint effects with density on population growth rate (PGR). Exposure to 60 mu g/kg sediment or greater inhibited larval growth, and exposure to 88 mu g/kg or greater often resulted in mortality before reaching emergence. The effects of lufenuron, however, differed with population density. At 88 mu g/kg, mortalities and, to a lesser extent, reduced fecundity resulted in a reduction in PGR at low density. Conversely, when populations were initiated at high density, PGR was similar to that of controls, because the few survivors reached maturity sooner and started producing offspring earlier. The effect of density as a growth stressor therefore was stronger than the effect of lufenuron, which had effects similar to those of a mortality stressor and produced less-than-additive effects. Longterm studies under field conditions, however, are needed before less-than-additive effects are considered to be the norm.

DNA variation in a 13-Mb region including the F9 gene: inferring the genealogical history and causal role of a hemophilia B mutation (IVS 5+13 A -> G)

About 5.5% of all UK hemophilia B patients have the base substitution IVS 5+13 A-->G as the only change in their factor (F)IX gene (F9). This generates a novel donor splice site which fits the consensus better than the normal intron 5 donor splice. Use of the novel splice site should result in a missense mutation followed by the abnormal addition of four amino acids to the patients' FIX. In order to explain the prevalence of this mutation, its genealogical history is examined. Analysis of restriction fragment length polymorphism in the 21 reference UK individuals (from different families) with the above mutation showed identical haplotypes in 19 while two differed from the rest and from each other. In order to investigate the history of the mutation and to verify that it had occurred independently more than once, the sequence variation in 1.5-kb segments scattered over a 13-Mb region including F9 was examined in 18 patients and 15 controls. This variation was then analyzed with a recently developed Bayesian approach that reconstructs the genealogy of the gene investigated while providing evidence of independent mutations that contribute disconnected branches to the genealogical tree. The method also provides minimum estimates of the age of the mutation inherited by the members of coherent trees. This revealed that 17 or 18 mutant genes descend from a founder who probably lived 450 years ago, while one patient carries an independent mutation. The independent recurrence of the IVS5+13 A-->G mutation strongly supports the conclusion that it is the cause of these patients' mild hemophilia.