Dr. Markenscoff's research is in the areas of modeling of computer systems, computer architecture, distributed processing and microcomputer systems. Research projects have included the use of graph theoretical methods to determine the optimum partioning of tasks for fast execution on multiple processor systems; the performance evaluation of bus architectures for multiple processor systems using both analytical (queuing techniques) and simulation experiments; the design of real-time software for a hierarchical process control system consisting of microcomputers dedicated to control tasks and a general purpose host; the design of a multiple processor architecture for a printer and a communication controller for interfacing it to the IEEE-488 bus.