scispace - formally typeset
Search or ask a question
Institution

Naval Surface Warfare Center

FacilityWashington D.C., District of Columbia, United States
About: Naval Surface Warfare Center is a facility organization based out in Washington D.C., District of Columbia, United States. It is known for research contribution in the topics: Sonar & Radar. The organization has 2855 authors who have published 3697 publications receiving 83518 citations. The organization is also known as: NSWC.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the authors compared different control methods developed for the alternate control task of tracking an axial dynamic target, based on fuzzy logic, sliding mode, and direct linearization.

27 citations

Journal ArticleDOI
01 Jan 2007
TL;DR: In this paper, the authors focused on the computation of the critical velocity and investigation of the transient resonance in the assembly of a notional electromagnetic hypervelocity (EH) launcher.
Abstract: A projectile accelerating along launcher rails may cross a range of critical velocities and induce resonance. As a result, the rails and other components exhibit increased displacements and stress that may cause launcher failure. This work is focused on the computation of the critical velocity and investigation of the transient resonance in the assembly of a notional electromagnetic hypervelocity launcher. Several analytical and finite-element models were employed. Different models yielded a good correlation and aided in better understanding of the launcher dynamics. Analysis shows that various components of a launcher can have different critical velocities. The results of this work will further be used to develop a novel design approach based on the idea of controlling the intervals between the critical velocities to minimize the enhanced occurrence of induced resonance regimes in launcher assemblies

27 citations

Journal ArticleDOI
TL;DR: Two methods are tested for improving multispectral neural network classification: (a) new criterion functions and (b) incorporating contextual information, which yields significant improvements in classification accuracy over the standard least mean squares energy function.

27 citations

Journal ArticleDOI
TL;DR: A solid-state four element array gyromagnetic nonlinear transmission line high power microwave system is presented as well as a detailed description of its subsystems and general output capabilities.
Abstract: In this paper, a solid-state four element array gyromagnetic nonlinear transmission line high power microwave system is presented as well as a detailed description of its subsystems and general output capabilities. This frequency agile S-band source is easily adjusted from 2-4 GHz by way of a DC driven biasing magnetic field and is capable of generating electric fields of 7.8 kV/m at 10 m correlating to 4.2 MW of RF power with pulse repetition frequencies up to 1 kHz. Beam steering of the array at angles of ±16.7° is also demonstrated, and the associated general radiation pattern is detailed.

27 citations

Journal ArticleDOI
TL;DR: The data were acquired to provide data applicable to problems dealing with the determination of the radiation risk to humans engaged in long-term missions in space; however, the data are also of interest for issues related to the determinationof the radiation environment in high-altitude flight, with shielding at high- energy heavy-ion accelerators and with doses delivered outside tumor sites treated with high-energy hadronic beams.
Abstract: Neutron fluences have been measured from 155 MeV/nucleon 4He and 12C ions stopping in an Al target at laboratory angles between 10 and 160 deg. The resultant spectra were integrated over angle and energy above 10 MeV to produce total neutron yields. Comparison of the two systems shows that approximately two times as many neutrons are produced from 155 MeV/nucleon 4He stopping in Al and 155 MeV/nucleon 12C stopping in Al. Using an energy-dependent geometric cross-section formula to calculate the expected number of primary nuclear interactions shows that the 12C + Al system has, within uncertainties, the same number of neutrons per interaction (0.99 +/- 0.03) as does the 4He + Al system (1.02 +/- 0.04), despite the fact that 12C has three times as many neutrons as does 4He. Energy and angular distributions for both systems are also reported. No major differences can be seen between the two systems in those distributions, except for the overall magnitude. Where possible, the 4He + Al spectra are compared with previously measured spectra from 160 and 177.5 MeV/nucleon 4He interactions in a variety of stopping targets. The reported spectra are consistent with previously measured spectra. The data were acquired to provide data applicable to problems dealing with the determination of the radiation risk to humans engaged in long-term missions in space; however, the data are also of interest for issues related to the determination of the radiation environment in high-altitude flight, with shielding at high-energy heavy-ion accelerators and with doses delivered outside tumor sites treated with high-energy hadronic beams.

27 citations


Authors

Showing all 2860 results

NameH-indexPapersCitations
James A. Yorke10144544101
Edward Ott10166944649
Sokrates T. Pantelides9480637427
J. M. D. Coey8174836364
Celso Grebogi7648822450
David N. Seidman7459523715
Mingzhou Ding6925617098
C. L. Cocke513128185
Hairong Qi503279909
Kevin J. Hemker4923110236
William L. Ditto431937991
Carey E. Priebe434048499
Clifford George412355110
Judith L. Flippen-Anderson402056110
Mortimer J. Kamlet3910812071
Network Information
Related Institutions (5)
United States Naval Research Laboratory
45.4K papers, 1.5M citations

83% related

Sandia National Laboratories
46.7K papers, 1.4M citations

82% related

Lawrence Livermore National Laboratory
48.1K papers, 1.9M citations

80% related

Rensselaer Polytechnic Institute
39.9K papers, 1.4M citations

80% related

Los Alamos National Laboratory
74.6K papers, 2.9M citations

80% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20233
20227
202172
202071
201982
201884