ELECTRONIC STRUCTURE OF GE IN SIO2

It is argued that one-electron theory is insufficient to account for the origin of the observed spectra of Ge in SiO2 ( alpha -quartz) crystals. A simple model is employed to show that impurity states responsible for ESR spectra of SiO2:Ge are stabilised by many-electron polarisation effects associated with the Ge atom itself and its immediate oxygen neighbour

External Debt and Macroeconomic Performance in South Korea

During 1980-1986, South Korea went from being the world's fourth largest debtor country, in the midst of an economic crisis, to a model of successful adjustment, with high growth rates and a current account surplus. This paper summarizes the findings of an in depth analysis of Korea's performance, focusing on the experience with external debt. We argue that the explanations for Korea's recovery are closely linked to the explanations for Korea's very rapid growth during the 1960s and 1970s. The centerpieces have been a comprehensive export focused investment plan with external borrowing wed to supplement domestic savings in financing the investment and an active, interventionist government policy.

Societal Change and Values in Arab Communities in Israel: Intergenerational and Rural–Urban Comparisons

This study tested and extended Greenfield’s theory of social change and human development to adolescent development in Arab communities in Israel undergoing rapid social change. The theory views sociodemographic changes—such as contact with an ethnically diverse urban setting and spread of technology—as driving changes in cultural values. In one research design, we compared three generations, high school girls, their mothers, and their grandmothers, in their responses to value-assessment scenarios. In a second research design, we compared girls going to high school in an ethnically diverse city with girls going to school in a village. As predicted by the theory, a t test and ANOVA revealed that both urban life and membership in the youngest generation were significantly related to more individualistic and gender-egalitarian values. Regression analysis and a bootstrapping mediation analysis showed that the mechanism of change in both cases was possession of mobile technologies

Preliminary analysis of fuel tank impact

Following the accident involving the Air France Concorde in 2000 the effects of fluid structure interactions resulting from the impact of a fluid filled tank has become a cause for concern. The work reported here relates to the design of a series of experiments loosely based upon the Concorde incident which aimed to assess whether the probable failure mode in the Concorde accident could occur in land based vessels. Preliminary numerical analyses were undertaken for two of the nine cases that were investigated experimentally in which an empty tank was impacted by a projectile with a velocity of 14m/s and 21.9m/s Initial numerical results for the acceleration at two points on the tank surface and the deformation at the impact zone showed good agreement with test data. Future work is discussed including further numerical modelling incorporating fluid structure interactions for the analysis of the cases when the tank is partially full or completely full