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Full-Text Articles in Engineering

Supervisory Control And Data Acquisition (Scada) Systems, George H. Baker, Allan Berg Nov 2002

Supervisory Control And Data Acquisition (Scada) Systems, George H. Baker, Allan Berg

George H Baker

Our critical national infrastructure systems have become almost universally dependent upon computer-based control systems technically referred to as supervisory control and data acquisition (SCADA) systems. SCADA systems evolved from the telemetry and event-alarm systems developed in the early days of utilities. With the widespread use of SCADA systems, computers have become the "basis element" for much of our critical infrastructure. Thus, the disruption of controlling computer terminals and networks due to natural disasters, electric power failure, accidents or malicious activity can have catastrophic consequences.


Delivering On The 256 Qam Promise, Ron D. Katznelson Oct 2002

Delivering On The 256 Qam Promise, Ron D. Katznelson

Ron D. Katznelson

The accumulation of degradation factors in the downstream channels is reviewed with focus on headend/hub transmission-related noise aggregation due to a plurality of downstream Quadrature Amplitude Modulation (QAM) transmitters and upconverters. Substantial increase in the number of QAM transmitters based on frequency agile upconverters is expected. Unlike fixed channel upconverters, these do not have narrow band filters at their output, consequently imparting appreciable levels of broadband noise on the network when several such units are combined. Based on these factors and other noise contributions, it is shown that additional impairments due to fluctuations associated with composite distortion terms on the …


Decentralized Adaptive Coordination And Control Of Uninhabited Autonomous Vehicles Via Surrogate Optimization, Raúl Ordóñez Sep 2002

Decentralized Adaptive Coordination And Control Of Uninhabited Autonomous Vehicles Via Surrogate Optimization, Raúl Ordóñez

Raúl Ordóñez

No abstract provided.


Development Of An Autonomous Vehicles Research Laboratory, Raúl Ordóñez Dec 2001

Development Of An Autonomous Vehicles Research Laboratory, Raúl Ordóñez

Raúl Ordóñez

PI, funded by the University of Dayton Research Council, $3,800.


Deconvolution Of Compartmental Water Diffusion Coefficients In Yeast-Cell Suspensions Using Combined T1 And Diffusion Measurements, Matthew D. Silva, Karl G. Helmer, Jing-Huei Lee, Sam S. Han, Charles S. Springer, Christopher H. Sotak Dec 2001

Deconvolution Of Compartmental Water Diffusion Coefficients In Yeast-Cell Suspensions Using Combined T1 And Diffusion Measurements, Matthew D. Silva, Karl G. Helmer, Jing-Huei Lee, Sam S. Han, Charles S. Springer, Christopher H. Sotak

Sam Han

Deconvolution of Compartmental Water Diffusion Coefficients in Yeast-Cell Suspensions Using Combined T1 and Diffusion Measurements