(Un)reliability in sanitation monitoring: Analysis of East African urban data

This article looks at the difficulties measuring sanitation improvements in eastern Africa, arguing that data supplied by international bodies such as the WHO and UNICEF may not always be realistic and should be used with caution.

Design, Optimization, and Evaluation of a Path Query System

The model of the Universe of Discourse usually needs to be mapped onto the information technology environment chosen by the engineers. This mapping costs significant efforts, time and energy to construct, to use, and to maintain. All these efforts, time and energy can be saved, if the engineers choose an object data management system based on an...