Lexical access in Speech Production : the bilingual case. 'Acceso léxico en producción del lenguaje : el caso bilingüe'.

Resumen tomado de la revista

The influence of human capital of the workforce in the adoption of high-performance work systems : the case of Portugal and Spain. 'La influencia del capital humano de la mano de obra en la adopción de sistemas de trabajo de alto rendimiento: el caso de Portugal y España'.

Resumen tomado de la publicación

Global perspectives in the geography curriculum : reviewing the moral case for geography.

Se hace una critica al cambio de orientación dado a la enseñanza de la geografía desde 1990 en las escuelas del Reino Unido y de Estados Unidos por parte de los responsables de las políticas educativas. Así, al primar la perspectiva ética de estamateria sobre la investigación de conceptos, ideas y habilidades espaciales en los estudiantes, se socava el valor educativo de la geografía y la libertad de los jóvenes para dar forma al mundo en que viven.

Theory and Practice of Citizenship Education : the Case of Policy, Science and Education in the Netherlands. 'Teoría y práctica de la educación en la ciudadanía : política, ciencia y educación en los Países Bajos'.

Monográfico con el título: 'Educación, valores y democracia'. Resumen basado en el de la publicación

Equity in the higher fees era : a case study of English universities

Resumen basado en el de la publicai??n

Unimodality of wave amplitude in the northern Hemisphere

A novel statistic for local wave amplitude of the 500-hPa geopotential height field is introduced. The statistic uses a Hilbert transform to define a longitudinal wave envelope and dynamical latitude weighting to define the latitudes of interest. Here it is used to detect the existence, or otherwise, of multimodality in its distribution function. The empirical distribution function for the 1960-2000 period is close to a Weibull distribution with shape parameters between 2 and 3. There is substantial interdecadal variability but no apparent local multimodality or bimodality. The zonally averaged wave amplitude, akin to the more usual wave amplitude index, is close to being normally distributed. This is consistent with the central limit theorem, which applies to the construction of the wave amplitude index. For the period 1960-70 it is found that there is apparent bimodality in this index. However, the different amplitudes are realized at different longitudes, so there is no bimodality at any single longitude. As a corollary, it is found that many commonly used statistics to detect multimodality in atmospheric fields potentially satisfy the assumptions underlying the central limit theorem and therefore can only show approximately normal distributions. The author concludes that these techniques may therefore be suboptimal to detect any multimodality.

Bt cotton, pesticides, labour and health - A case study of smallholder farmers in the Makhathini Flats, Republic of South Africa

This paper describes some of the results of a detailed farm-level survey of 32 small-scale cotton farmers in the Makhathini Flats region of South Africa. The aim was to assess and measure some of the impacts (especially in terms of savings in pesticide and labour as well as benefits to human health) attributable to the use of insect-tolerant Bt cotton. The study reveals a direct cost benefit for Bt growers of SAR416 ($51) per hectare per season due to a reduction in the number of insecticide applications. Cost savings emerged in the form of lower requirements for pesticide, but also important were reduced requirements for water and labour. The reduction in the number of sprays was particularly beneficial to women who do some spraying and children who collect water and assist in spraying. The increasing adoption rate of Bt cotton appears to have a health benefit measured in terms of reported rates of accidental insecticide poisoning. These appear to be declining as the uptake of Bt cotton increases. However, the understanding of refugia and their management by local farmers are deficient and need improving. Finally, Bt cotton growers emerge as more resilient in absorbing price fluctuations.