scispace - formally typeset
Search or ask a question
Institution

Wright-Patterson Air Force Base

OtherWright-Patterson AFB, Ohio, United States
About: Wright-Patterson Air Force Base is a other organization based out in Wright-Patterson AFB, Ohio, United States. It is known for research contribution in the topics: Laser & Mach number. The organization has 5817 authors who have published 9157 publications receiving 292559 citations. The organization is also known as: Wright-Patterson AFB & FFO.


Papers
More filters
Patent
30 Jun 1993
TL;DR: In this paper, a cannulated pin set is used to guide and insert fixation screws across a sacroiliac joint using the tip of a targeting screw inserted from the rear into a human sacrum as a target for guiding fixation screws.
Abstract: A novel guide or jig for safe and accurate placement of fixation screws across a sacroiliac joint uses the tip of a sacro-pedicle targeting screw inserted from the rear into a human sacrum as a target for guiding fixation screws. The head of the targeting screw attaches to one end of a straight first arm of a jig member. The other end of the straight arm of the jig member is attached at an angle to a semicircular second arm of the jig member. The semicircular second arm has an open slot to which is attached a bushing assembly which can be moved along and fixed in place anywhere along the slot. A cannulated pin set fits through the bushing assembly. The dimensions of the targeting screw and the jig member, including the angle between the two arms of the jig member and the radius of curvature of the semicircular second arm, are such that the cannulated pin set, when inserted through the bushing assembly, lies along a line drawn as a radius from the tip of the targeting screw. The cannulated pin set is used to guide and insert fixation screws across the sacroiliac joint. The jig insures that at any position of the bushing assembly along the semicircular second arm a fixation screw will be properly guided into position across the joint.

144 citations

Journal ArticleDOI
TL;DR: It is shown that complex PT-symmetric photonic lattices can lead to a new class of self-imaging Talbot effects, and that the input field pattern has to respect specific periodicities dictated by the symmetries of the system.
Abstract: We show that complex $\mathcal{P}\mathcal{T}$-symmetric photonic lattices can lead to a new class of self-imaging Talbot effects. For this to occur, we find that the input field pattern has to respect specific periodicities dictated by the symmetries of the system. While at the spontaneous $\mathcal{P}\mathcal{T}$-symmetry breaking point the image revivals occur at Talbot lengths governed by the characteristics of the passive lattice, at the exact phase it depends on the gain and loss parameter, thus allowing one to control the imaging process.

144 citations

Journal ArticleDOI
TL;DR: A statistical algorithm has been developed to compensate for the fixed-pattern noise associated with spatial nonuniformity and temporal drift in the response of focal-plane array infrared imaging systems, and the restored images compare favorably with those restored by use of a multiple-point calibration technique.
Abstract: A statistical algorithm has been developed to compensate for the fixed-pattern noise associated with spatial nonuniformity and temporal drift in the response of focal-plane array infrared imaging systems. The algorithm uses initial scene data to generate initial estimates of the gain, the offset, and the variance of the additive electronic noise of each detector element. The algorithm then updates these parameters by use of subsequent frames and uses the updated parameters to restore the true image by use of a least-mean-square error finite-impulse-response filter. The algorithm is applied to infrared data, and the restored images compare favorably with those restored by use of a multiple-point calibration technique.

143 citations

Journal ArticleDOI
TL;DR: The use of corrosion inhibitors within organically modified sol-gel coatings is discussed in this article, where the improved performance characteristics were derived from the solgel ability to form a uniform, low defect, barrier coating.
Abstract: Sol–gel coatings were investigated as potential replacements for chromate-based surface treatments on aircraft aluminum alloys. Unlike chromate based treatments current sol–gel coatings do not have the ability to leach corrosion inhibitors upon coating damage and minimize corrosion of the unprotected area. As an alternative, environmentally compliant non-chromate inhibitors of Ce(NO3)3, NaVO3 and Na2MoO4 were incorporated into a Zr-epoxy sol–gel. Results are reported on the coatings chemical analysis and their corrosion protection performance based on electrochemical studies. Aluminum alloy 2024-T3 test coupons coated with protective sol–gel films were found to provide considerable corrosion protection. The improved performance characteristics were derived from the sol–gel ability to form a uniform, low defect, barrier coating. Coatings doped with Ce(NO3)3 had barrier properties at least as good as the standard sol–gel coatings. Coatings with Na2MoO4 and NaVO3 did not provide adequate corrosion protection. The use of corrosion inhibitors within organically modified sol–gel coatings is discussed.

143 citations

Journal ArticleDOI
TL;DR: In this article, a multilayer YSZirconia nanocomposite composite surface was constructed by inserting a TiN surface barrier layer with pinholes on the composite surface to control vertical silver diffusion.

142 citations


Authors

Showing all 5825 results

NameH-indexPapersCitations
John A. Rogers1771341127390
Liming Dai14178182937
Mark C. Hersam10765946813
Gareth H. McKinley9746734624
Robert E. Cohen9141232494
Michael F. Rubner8730129369
Howard E. Katz8747527991
Melvin E. Andersen8351726856
Eric A. Stach8156542589
Harry L. Anderson8039622221
Christopher K. Ober8063129517
Vladimir V. Tsukruk7948128151
David C. Look7852628666
Richard A. Vaia7632425387
Kirk S. Schanze7351219118
Network Information
Related Institutions (5)
Technion – Israel Institute of Technology
79.3K papers, 2.6M citations

87% related

Georgia Institute of Technology
119K papers, 4.6M citations

87% related

Virginia Tech
95.2K papers, 2.9M citations

86% related

University of Cincinnati
72.5K papers, 2.6M citations

85% related

University of Tennessee
87K papers, 2.8M citations

85% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20234
202211
2021279
2020298
2019290
2018272