The electroencephalogram (EEG) is a physiologic measure of cerebral function that has been used by some to assess coma and prognosticate survival and global outcome after traumatic brain injury (TBI). Surface recordings of the brain's electrical activity reveal distinct patterns that indicate injury severity, depth of unconsciousness, and patient survival. The data produced with traditional qualitative studies, however, does not allow resolution and quantification of the wave frequency spectrum present in the brain. As a result, conventional EEG typically has only been used for gross and qualitative analyses and is not practical for use in long-term patient monitoring or as a sophisticated prognostic tool. One area of investigation that is working to address the limitations of conventional EEG has been the development and implementation of Fourier Transform (FT) EEG which resolves and quantifies frequency bands present in the brain. When FT analysis is applied to EEG, it provides concurrent and continuous monitoring, resolution, and quantification of all frequencies emitted. This review discusses the history and significance of conventional EEG and provides a review of how FT-EEG, commonly referred to as Quantitative EEG (QEEG), is being used in the clinical setting. The specific applications and significance of QEEG methods regarding treatment of patients with TBI are discussed in detail. The advantages, disadvantages, and future directions of QEEG in TBI are also discussed.

Tbris paper examines the concept of placing a rover on the Moon as one of the first elements in the Prresident'p Space Exploration Initiative (SEI). The co:ncept, called Rover First, initially serves as a teleoperated explorer and test bed for hardware development. During subsequent manned visits the vehicle is used to provide astronauts with a shirtslepve environment and the radiation protectrion necessary for extended surface exploration. Iletween the piloted missions, the rover is controlled from Earth and continues to serve in a dual (teleoperated and piloted) mode throughout permanent base development. A method to implement an early, low-cost program based on proven systems is presented.

Major aspects of engineering planetary transportation vehicles are discussed. Emphasis is placed on the the mechanics of mobility and mobility system design, including considerations for designing the wheels, drive, steering, and suspension systems. Because mobility performance of any vehicle is extremely sensitive to environmental (e.g. soil properties) and design (e.g. vehicle weight) parameters, the mechanics of mobility are addressed by parametric application as well as empirical (derived relationships and equations) form. Finally, and more philosophical in nature, discussions of the key considerations for designing and analyzing each of the components of mobility (locomotion, steering, suspension, and stability) are also included. These discussions include some general guidelines to assist in determining the values of key design parameters.

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