Experimental and Analytical Study of Seismic Soil-Pile-Structure Interaction in Layered Soil Half-Space

The dynamic interaction of pile foundations, embedded in a horizontally stratified soil profile, with superstructures under low to moderate earthquake excitation can be handled in different ways. In this article, the soil-pile-superstructure dynamic interaction problem has been investigated using the coupled finite element-boundary element method. Comparison with shaking table experiments of a small scale model pile shows a good correlation with the proposed method in terms of the kinematic response of pile foundations and the structural response. A parametric study of the proposed model has yielded important results essentially concerning the amplification factors of the pile foundation and the superstructure.     

The Politics of Emotion in Participatory Processes of Empowerment and Change

In this article I reflect on the role of critical analysis and emotions in participatory approaches to empowerment and change. I argue that, in participatory research and practice, certain cognitive and analytical knowledges are prioritized as principal catalysts of empowerment and transformation at the cost of recognizing, and making full use of, the empowering potential of emotional and embodied knowledges. This argument is developed based on 2 years of fieldwork in a local youth participation project in Mejicanos, a poor and violent neighborhood in El Salvador, aiming at empowering young people by involving them in participatory action research (PAR). ¹ As part of my research, I looked critically at the young people's PAR process, asking whether and how they felt empowered by it and whether and how social change came about. Originally, the research did not focus on emotions, yet, in an inductive fashion, emotions and embodied knowledges evolved from fieldwork as crucial elements in understanding participation, empowerment and social transformation.     

Continental Patterns in Stone Tools: A Technological and Biplot-Based Comparison of Early Late Pleistocene Assemblages from Northern and Southern Africa

The technology of the end products i.e. blades and points in Late Pleistocene stone artefact assemblages from Klasies River, South Africa, and the Nile Valley, Egypt, are compared. The comparison includes univariate and multivariate analysis of metrical attributes enhanced by graphical biplot displays. The end products in these assemblages are either dominantly points or blades and this is related to the core reduction strategy adopted. The MSA 11 from Klasies River and the Nubian Complex industry from the Nile Valley are point industries made in the Levallois tradition, while the MSA 1 from Klasies River and the Taramsan from the Nile Valley may be non-Levallois or adapted Levallois blade industries. Dating of the assemblages shows the changes between dominant core reduction strategies are sequential and time restricted in both South and North Africa. It is concluded that variability of the same kind occurs in Middle Stone Age and Middle Palaeolithic assemblages south and north of the Sahara in the early Late Pleistocene.Dans cet article, les technologies des produits recherchés, des lames et des pointes, pour certains ensembles lithiques de Klasies River, Afrique du Sud et la Vallée du Nil, Egypte, sont comparées. Cette comparaison implique des analyses univariées et multivariées de variables métriques biplot. Les produits recherchés sont bien des pointes que des lames, selon les stratégies dexploitation adoptées. Le MSA II de Klasies River et le Complexe nubien de la Vallée du Nil sont des industries à pointes issues de la tradition Levallois. Par contre, le MSA I de Klasies River et le Taramsien de la Vallée du Nil évoquent une technologie de production non-Levallois ou Levallois modifiée. Les éléments de datation disponibles indiquent que les changements dans la prépondérance des stratégies dexploitation senchaînent dans une séquence chronologique bien identifiable, aussibien dans lAfrique du Sud que lAfrique du Nord. On arrive à la conclusion quune variabilité du même caractère est attestée dans les ensembles du Middle Stone Age et du Paléolithique moyen au sud et au nord du Sahara, pendant le Pléistocène supérieur ancien.     

"Jehovah Will Provide": Lillian Gobitas and Freedom of Religion

In 1935, twelve-year-old Lillian Gobitas and her siblings heard the words of Joseph Rutherford, the head of the Jehovah's Witness group the Watchtower Society, on the radio in their kitchen. He implored Witnesses to refuse to salute the American flag since it amounted to the worship of a false idol, which violated the law of God as set forth in the Bible. ¹ Rutherford made reference to the courage of Witnesses in Germany who refused to salute Hitler in the face of the unbelievable oppressions of the Nazi regime and similarly called for American Witnesses to refuse to salute the flag. It was a message that struck a chord with Lillian Gobitas.