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Operations Research, Systems Engineering and Industrial Engineering Commons

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Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering

High Performance, Point-To-Point, Transmission Line Signaling, André Dehon, Thomas F. Knight Jr. Jan 1998

High Performance, Point-To-Point, Transmission Line Signaling, André Dehon, Thomas F. Knight Jr.

Departmental Papers (ESE)

Inter-chip signaling latency and bandwidth can be key factors limiting the performance of large VLSI systems. We present a high performance, transmission line signaling scheme for point-to-point communications between VLSI components. In particular, we detail circuitry which allows a pad driver to sense the voltage level on the attached pad during signaling and adjust the drive impedance to match the external transmission line impedance. This allows clean, reflection-free signaling despite the wide range of variations common in IC device processing and interconnect fabrication. Further, we show how similar techniques can be used to adjust the arrival time of signals to ...


Increasing Potential Of Road Pricing For Improved Efficiency Of Urban Transportation, Vukan R. Vuchic, Antonio Musso Jan 1998

Increasing Potential Of Road Pricing For Improved Efficiency Of Urban Transportation, Vukan R. Vuchic, Antonio Musso

Departmental Papers (ESE)

There are a number of factors which contribute to the continuous pressure for driving in different cities. However most serious, but often overlooked is the problem that the structure of costs of driving stimulates excessive car use. This paper presents the structure of driving costs and classifies then into user, social and environmental costs. The incidence of all these costs is discussed. The importance of using road pricing for a more effective control of the demand for car travel is shown. The paper reviews objectives of road pricing and actions for their implementation and concludes that the need for road ...


Safe Cooperative Robotic Patterns Via Dynamics On Graphs, Robert W. Ghrist, Daniel E. Koditschek Jan 1998

Safe Cooperative Robotic Patterns Via Dynamics On Graphs, Robert W. Ghrist, Daniel E. Koditschek

Departmental Papers (ESE)

This paper explores the possibility of using vector fields to design and implement reactive schedules for safe cooperative robot patterns on graphs. The word "safe" means that obstacles - designated illegal portions of the configuration space - are avoided. The word "cooperative" connotes situations wherein physically distributed agents are collectively responsible for executing the schedule. The word "pattern" refers to tasks that cannot be encoded simply in terms of a point goal in the configuration space. The word "reactive" will be interpreted as requiring that the desired pattern be asymptotically stable: conditions close but slightly removed from those desired remain close and ...