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The current study used a single trial bead discrimination task for the young chick to ascertain if inhibitors of P2 purinergic receptors would impair memory retention. Suramin and PPADS provided similar retention profiles. Loss of memory retention was evident by 60 min post-training. Both drugs caused persistent memory loss which was still evident 24h… (More)
In 1989, NASA's Langley Research Center (LaRC) initiated the High-Speed Airframe Integration Research (HiSAIR) Program to develop and demonstrate an integrated environment for high-speed aircraft design using advanced multidisciplinary analysis and optimization procedures. The major goals of this program were to evolve the interactions among disciplines and… (More)
No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of The American Public Transportation Association. Abstract: This standard provides minimum requirements for inspecting and maintaining rail transit system tracks.