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1,115 results on '"Bushby, A. J."'

208. Fatigue Assessment: Subjective Peer-to-Peer Fatigue Scoring (Reprint)

Author

ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL WARFIGHTER HEALTH DIV, Gaydos, Steven J, Curry, Ian P, Bushby, Alaistair J, ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL WARFIGHTER HEALTH DIV, Gaydos, Steven J, Curry, Ian P, and Bushby, Alaistair J

Abstract

Fatigue is a complex entity with contributing factors that may include insufficient sleep, circadian dysrhythmia, high workload, extended duty periods, clinical sleep pathology, psychosocial aspects, environmental factors, and many others. It can contribute to significant performance deficits and crucial safety lapses. Despite maximal implementation of accepted techniques and best practices for mitigation strategies, the deployed military rotary-wing (RW) environment must still contend with substantial fatigue-related issues among aircrew. We introduce a novel subjective peer-to-peer fatigue rating system recently demonstrated in a deployed military RW environment. Each pilot provides an anonymous weekly fatigue rating for every other pilot in the unit exclusive of self. Median and variance of the peer ratings for each pilot are recorded by the safety officer and tracked over time. The program allows for a multidimensional external perspective on a pilot's fatigue state, relative function, and degree of coping. Scoring is predicated upon the recognition of a significant deviation from a peer's baseline that may include social and interpersonal interactions or the observation of deficits in duty performance. The research basis for scientific validity and reliability regarding current peer fatigue scoring systems is exiguous. This novel approach may be of merit, particularly among military aircrew in a deployed-type setting with sustained high workload, operational stress, and limited time for supernumerary tasks. An anonymous subjective peer-to-peer fatigue scoring system is worthy of further scientific investigation, particularly warranting studies of reliability and validity., The original document contains color images. Pub. in Aviation, Space, and Environmental Medicine, volume 84, number 10, pages 1105-1108, October 2013

Published
2013

211. Ten Years of Spatial Disorientation in U.S. Army Rotary-Wing Operations (Reprint)

Author

ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL, Gaydos, Steven J, Harrigan, Michael J, Bushby, Alaistair J, ARMY AEROMEDICAL RESEARCH LAB FORT RUCKER AL, Gaydos, Steven J, Harrigan, Michael J, and Bushby, Alaistair J

Abstract

Spatial disorientation (SD) has plagued aviation since its inception, contributing to numerous lost lives, destroyed or damaged aircraft, and a reduction in operational mission effectiveness. Military rotary-wing (RW) operations are not immune. The U.S. Army has retired many legacy aircraft represented in older studies, developed new training regimens for aircrew, continued to expand its night vision capabilities, and has prosecuted combat operations for some 10 yr utilizing new tactics, techniques, and procedures. For these reasons, it is important and relevant to re-engage the subject of SD among accidents within the Army's RW community. The U.S. Army's Combat Readiness/Safety Center database at Fort Rucker, AL, was queried for the previous 10 yr RW mishaps from fiscal year (FY) 2002 through FY 2011 (FY11 current through 01 July). Accidents identified as having SD as a contributing factor were selected. From FY 2002 to FY 2011, there were 100 Class A through C rotary-wing flight mishaps involving SD. This represents 11% of all Class A through C rotary-wing flight accidents for this period. Of the 100 SD-related accidents, 22% involved fatalities, and 39% involved fatalities and/or injuries. The total number of RW SD-related accidents with fatalities represents 31% of the total helicopter accidents with fatalities for the 10-yr period. This review of accident data confirms that SD remains a substantial issue for the Army aviation community and reinforces the importance and relevance of SD awareness, research, education, and training in RW operations., The original document contains color images.

Published
2012

215. Nanoscale-Targeted Patch-Clamp Recordings of Functional Presynaptic Ion Channels

Author

Novak, Pavel, primary, Gorelik, Julia, additional, Vivekananda, Umesh, additional, Shevchuk, Andrew I., additional, Ermolyuk, Yaroslav S., additional, Bailey, Russell J., additional, Bushby, Andrew J., additional, Moss, Guy W.J., additional, Rusakov, Dmitri A., additional, Klenerman, David, additional, Kullmann, Dimitri M., additional, Volynski, Kirill E., additional, and Korchev, Yuri E., additional

Published
2013
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220. The Hall-Petch effect as a manifestation of the general size effect.

Author

Li, Y., Bushby, A. J., and Dunstan, D. J.

Subjects
HALL effect, SQUARE root, MICROMECHANICS, BAYESIAN analysis, INVERSE relationships (Mathematics)
Abstract

The experimental evidence for the Hall-Petch dependence of strength on the inverse square-root of grain size is reviewed critically. Both the classic data and more recent results are considered. While the data are traditionally fitted to the inverse squareroot dependence, they also fit well to many other functions, both power law and non-power law. There have been difficulties, recognized for half-a-century, in the inverse square-root expression. It is now explained as an artefact of faulty data analysis. A Bayesian meta-analysis shows that the data strongly support the simple inverse or lnd/d expressions. Since these expressions derive from underlying theory, they are also more readily explicable. It is concluded that the Hall-Petch effect is not to be explained by the variety of theories found in the literature, but is a manifestation of, or to be underlain by the general size effect observed throughout micromechanics, owing to the inverse relationship between the stress required and the space available for dislocation sources to operate. [ABSTRACT FROM AUTHOR]

Published
2016
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222. First observation of an n-doped quasi-one-dimensional electronically-conducting discotic liquid crystal

Author

Boden, Neville, Borner, Ruth C., Bushby, Richard J., and Clements, Jonathan

Subjects
Liquid crystals -- Research, Semiconductor doping -- Analysis, Chemistry
Abstract

Conventional doping methods enable the preparation of both n-doped and p-doped quasi-one-dimensional semiconducting discotic liquid crystals. This method facilitates the preparation of potassium doped 2,3,7,8, 12,13-hexakis(hexylthio)tricycloquinazoline (HHTQ). A comparative study of conductivities and spin concentrations of K-doped HHTQ with those of AlCl3-doped 2,3,6,7,10,11-hexakis(hexyloxy)triphenylene reveals the independent nature of single charged carriers. A hopping mechanism explains the characteristics of both samples.

Published
1994

238. Micromechanical testing with microstrain resolution

Author

Dunstan, D. J., primary, Gallé, J. U., additional, Ehrler, B., additional, Schmitt, N. J., additional, Zhu, T. T., additional, Hou, X. D., additional, P’ng, K. M. Y., additional, Gannaway, G., additional, and Bushby, A. J., additional

Published
2011
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243. Concentrating Membrane Proteins Using Asymmetric Traps and AC Electric Fields

Author

Cheetham, Matthew R., primary, Bramble, Jonathan P., additional, McMillan, Duncan G. G., additional, Krzeminski, Lukasz, additional, Han, Xiaojun, additional, Johnson, Benjamin R. G., additional, Bushby, Richard J., additional, Olmsted, Peter D., additional, Jeuken, Lars J. C., additional, Marritt, Sophie J., additional, Butt, Julea N., additional, and Evans, Stephen D., additional

Published
2011
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