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Exploring Smaller Settlements of the Great Zimbabwe Tradition, Buhera Region, Zimbabwe

Most work on the Great Zimbabwe tradition has focused on Great Zimbabwe itself and its major successor settlements. Smaller, contemporary stonewalled sites, some hundreds of kilometres from Great Zimbabwe, have been only mapped in most cases. Our goal has been to begin to explore both the homesteads within stone-enclosures at smaller Great Zimbabwe-tradition sites, and to seek out homesteads lying

Grafchart and Batch Recipe Structures

The paper presents how Grafchart can be used to implement batch recipe structures. Grafchart, a toolbox based on Grafcet/SFC, object-oriented programming constructs and ideas from high-level Petri nets, is presented in the paper. Grafchart exists in two versions, one basic version and one high-level version. By using the different features of Grafchart in various ways, recipes can be given differe