The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)U SUPPLEMENTARY NOTES ABSTRACTThe objective of the present study was to compare systemic arterial pressure (SAP), rheoencephalogram (REG), and carotid flow (CF) measured by Doppler ultrasound. Twenty-eight anesthetized Yorkshire pigs were measured to evaluate Cerebral Blood Flow (CBF) Autoregulation (AR) during several CBF manipulations: hemorrhage, positive end-expiratory pressure (PEEP), and transitory SAP decrease and increase. Data were sampled with 200 Hz and processed off-line. 1) Hemorrhage elicited a decrease in SAP and transitory increases in REG and CF amplitude; 2) PEEP resulted in a decrease in SAP and increases in REG and CF amplitude; 3) PEEP after hemorrhage caused decreases in SAP, REG and CF amplitudes. When CBF AR was present, it was detected by both REG and carotid flow. Following hemorrhage, CBF AR was lost; CF and REG passively followed SAP. The clinical importance of these findings is that REG can be measured more conveniently and continuously in humans than can Doppler ultrasound. Therefore, measurement of CBF autoregulation by REG has potential for use as a life sign monitoring modality. SUBJECT TERMSL.A2 are better conductors than brain tissue. Consequently any change in fluid content within the cranial cavity will cause a change in conductivity/impedance. In healthy subjects,
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These improvements i n v o l v e mainlanes, frontage roads and i n t e r s e c t i o n s , and p r ov i s i o n s f o r an elevated transitway located i n t h e median o f t h e freeway. The o b j e c t i v e o f t h e m o t o r i s t information p r o j e c t i s t o provide accurate and t i m e l y information f o r Greenway Plaza employees on freeway construction, accidents, and disabled vehicles. The information on the computer d i s p l a y terminals w i l l be obtained from several commercial t r a f f i c advisory services, M o t o r i s t Assistance Program, TSDHPT courtesy p a t r o l radio, t r a n s i t a u t h o r i t y , law enforcement, and other emergency vehicles. Additional roadway c o n d i t i o n r e p o r t s and i n c i d e n t management information t h a t r e l a t e t o t r a f f i c operations w i l l be provided t o these terminals by t h e TSDHPT I n t e r i m T r a f f i c Control Center. Description TvDe and Format o f Messaqes D i sD1 aved The system i s designed t o provide roadway and t r a f f i c c o n d i t i o n i n t e x t form w i t h various c o l o r s and computer graphics techniques t o p r i o r i t i z e and categorize t h e information. Because t h e d i s p l a y terminals w i l l be used f o r t r i p planning f o r those persons already i n t h e Southwest Freeway C o r r i d o r (i.e. a t t h e Greenway Plaza terminal l o c a t i o n s ) , t h e information should be p r i o r i t i z e d f o r t h i s audience. A suggested p r i o r i t y l i s t i n g o f messages i s shown bel ow: P r i o r i t y No. 1: o I n c i d e n t s i n v o l v i n g lane blockages on t h e Southwest F r e e w a y ( a c c i d e n t s , c o n s t r u c t i o n , s t a l l s , maintenance). o I n c i d e n t s on access r o u t e s t o Southwest Freeway (frontage roads, ramps, cross s t r e e t s ) . o Major problems on adjacent a r t e r i a l s and cross s t r e e t s . 424 CH2789=6/89100000424$1.00 @ 1989 IEEE P r i o r i t y No. 2: o I n c i d e n t s i n v o l v i n g lane blockages on t h e 1-610 West Loop. P r i o r i t y No. 3: o The most severe i n c i d e n t i n v o l v i n g another urban freeway. P r i o r i t y No. 4 : o I n c i d e n t s on other freeways. P r i o r i t y No. 5: o Roadway c o n d i t i o n s (congestion) on Southwest Freeway. Place Southwest Freeway message w i t h i n a box. o Show only Southwest Freeway messages on t h e d i spl ays . o Some o t h e r mode o r combination o f the f o u r . The type o f information t o be displayed has n o t been decided a t t h i s time. However, t h e f o l l o w i n g recommendations are submitted: A l l accidents on t h e Southwest Freeway t h a t b l o c k one o r more lanes. A l l disabled vehicles on the Southwest Freeway t h a t block one o r more lanes. Any c o n s t r u c t i o n o r maintenance a c t i v i t y t h a t blocks one o r more lanes and/or a f f e c t s t h e operational e f f i c i e n c y and s a f e t y o f t h e freeway . A l l accidents on t h e 1-610 West Loop t h a t b l o c k one o r more lane...
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