The present study aims to provide insight into the value of different teacher roles in designing and implementing technology-rich learning activities for early literacy. Three cases, each with a different teacher role (executoronly, re-designer, co-designer) were examined. In the executor-only role, teachers implemented ready-made activities. In the re-designer role teachers collaboratively re-...

Microarray technologies enable genome-scale expression measurements. Already proved to be of value for the functional analysis of individual genes and biological processes, the application of expression profiling to disease gene discovery is now growing in importance and practicality.

Organocatalytic direct C3 alkenylation of indoles has been developed. Simple and readily available morpholine trifluoroacetic acid salt is employed as an efficient catalyst in this oxidative dehydrogenative reaction. Simplicity and practicality constitute the most attractive advantages of this reaction.

In January 1991, the European Space Agency commissioned a study into the practicality of using process-based scheduling techniques in an on-board application environment, with Ada as the implementation language. This short paper summarises the results of that study.