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Fred H Previc


Click on the titles below to find US government-authored or -collected reports written by Fred H Previc

Total Results: 6 Results per page:
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The Effects of a Novel Head-Mounted Symbology on Spatial Disorientation and Flight Performance in U.S. Air Force Pilots 24 Oct 2012 15 pages
Authors:  Fred H Previc; Nathan A Dillon; Rick H Evans; Ryan Maresh; William R Ercoline; Joseph Fischer; SCHOOL OF AEROSPACE MEDICINE WRIGHT PATTERSON AFB OH
The full text of this report is available for sale.Spatial disorientation (SD) has accounted for about 25% of all Class A mishaps in the U.S. Air Force over the past several decades, with over 40% of fatal mishaps attributed to SD. One way to counter SD is by improving attitude awareness (pitch and roll) and overall spatial orientation through improved primary flight displays. One such display, the X-Motion Device(Trademark) (XMD), is a see-through device resembling standard eyewear but with ...


The Effects of Sleep Deprivation on Flight Performance, Instrument Scanning, and Physiological Arousal in Pilots Jan 2009 22 pages
Authors:  Fred H Previc; Nadia Lopez; William R Ercoline; Christina M Daluz; Andrew J Workman; Richard H Evans; Nathan A Dillon; NORTHROP GRUMMAN SAN ANTONIO TX
The full text of this report is available for sale.The effects of 34 hr of continuous wakefulness on flight performance, instrument scanning, subjective fatigue, and EEG activity were measured. Ten fixed-wing military pilots flew a series of 10 simulator profiles, and root mean squared error was calculated for various flight parameters. Ocular scan patterns were obtained by magnetic head tracking and infrared eye tracking. Flying errors peaked after about 24 to 28 hr of continuous wakefulness in line with ...


Simulator-Induced Spatial Disorientation: Effects of Age, Sleep Deprivation, and Type of Conflict May 2007 9 pages
Authors:  Fred H Previc; William R Ercoline; Richard H Evans; Nathan Dillon; Nadia Lopez; Christina M Daluz; Andrew Workman; HUMAN EFFECTIVENESS DIRECTORATE WRIGHT-PATTERSON AFB OH 711 HUMAN PERFORMANCE WING
The full text of this report is available for sale.Spatial disorientation mishaps are greater at night and with greater time on task, and sleep deprivation is known to decrease cognitive and overall flight performance. However, the ability to perceive and to be influenced by physiologically appropriate simulated SD conflicts has not previously been studied in an automated simulator flight profile. Methods: A set of 10 flight profiles were flown by 10 U.S. Air Force (USAF) pilots over a period ...


Gateway. Volume 14, Number 4, 2004 01-Jan-2004 17 pages
Authors:  James W Ness; Victoria Tepe; Darren R Ritzer; Karl E Friedl; Linda Elliott; Elizabeth S Redden; Vickers; Ross R Jr; Fred H Previc; HUMAN SYSTEMS INFORMATION ANALYSIS CENTER WRIGHT-PATTERSON AFB OH HSIAC PROGRAM OFFICE
The full text of this report is available for sale.The Human Systems IAC is a United States Department of Defense Information Analysis Center administered by the Defense Technical Information Center, Fort Belvoir, Virginia, technically managed by the Air Force Research Laboratory Human Effectiveness Directorate, Wright-Patterson Air Force Base, Ohio, and operated by Booz Allen Hamilton, McLean, Virginia. Human Systems IAC Gateway is published and distributed free of charge by the Human Systems Information Analysis Center. Some articles include: Science ...


A Test of Thumb and Index Finger Control in Overcoming a Visual Analogue of the Giant Hand Illusion. Apr 1991 7 pages
Authors:  Lisa F Weinstein; Fred H Previc; Carl G Simpson; Terence J Lyons; Kent K Gillingham; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
The full text of this report is available for sale.Anecdotal evidence suggests that a thumb and index finger grip might facilitate recovery from the manifestation of spatial disorientation known as the giant hand phenomenon. Sixteen pilots volunteered as subjects in an experiment that compared the effectiveness of the thumb and index finger versus the whole hand technique to overcome a visually induced analogue of the giant hand phenomenon. Thumb and index finger control produced greater stability overall, but did ...


Functional Specialization in the Lower and Upper Visual Fields in Humans: Its Ecological Origins and Neurophysiological Implications Jan 1990 58 pages
Authors:  Fred H Previc; SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TX
The full text of this report is available for sale.Functional specialization in the lower and upper visual fields in humans is analyzed in relation to the origins of the primate visual system. Processing differences between the vertical hemifields are related to the distinction between near (peripersonal) and far (extrapersonal) space, which are biased toward the lower and upper visual fields, respectively. Nonlinear/global processing is required in the lower visual field in order to perceive the optically degraded and diplopic ...


Total Results: 6 Results per page: