We have built an Ad hoc Protocol Evaluation testbed (APE) in order to perform large-scale, reproducible experiments. APE aims at assessing several different routing protocols in a real world environment instead of by simulation. We present the APE testbed architecture and report on initial experiments with up to 37 physical nodes that show the reproducibility and scalability of our approach. Several scenario scripts have been written that include strict choreographic instructions to the testers who walk around with ORiNOCO equipped laptops. We introduce a metric called Virtual Mobility that we use to compare different testruns. This metric is based on the measured signal quality instead of the geometric distance between nodes, hence it reflects how a routing protocol actually perceives the network's dynamics.

A case of thrombocytopenic purpura, megacaryocytopenia and signs of auto-immune processes (positive direct Coomb's test) is presented. I t was later complicated by an intracranial haemorrhage. .4t autopsy a thymoma (microscopically a lymphoepithelioma with spindle cell predominance) was found. The possible causal relationship between the two disorders is discussed.