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Featured researches published by Bradley R. Schaefer.


national aerospace and electronics conference | 1991

Apply COMPUSEC principles to closed network systems

Bill Worger; Joan McDonald; Bradley R. Schaefer

Discusses the application of the trusted computer system evaluation criteria (TCSEC) and the trusted network interpretation (TNI) to closed network systems (systems which are entirely contained within a single secure enclosure such as a tank, ship, or aircraft). The authors discuss various COMPUSEC (computer security) principles (focused in the B division, but not specific to a class) and their applicability to closed systems. They also make suggestions on how to use unique properties of the closed systems to reduce the impact of incorporating COMPUSEC principles into these systems.<<ETX>>


Archive | 2003

Method for joining dispatch calls

Mark L. Shaughnessy; Peter J. Armbruster; James P. Krakora; Bradley R. Schaefer; William N. Shores


Archive | 2002

Push-to-talk/cellular networking system

Bradley R. Schaefer; Mark L. Shaughnessy; Peter J. Armbruster


Archive | 2001

Conference call bridge arrangement

Bradley R. Schaefer; Mark L. Shaughnessy; Peter J. Armbruster


Archive | 2002

Call setup for a mobile packet data dispatch network

Nigel M. May; Mark A. Marick; Bradley R. Schaefer; Mark L. Shaughnessy; William J. Sugden


Archive | 2001

Token passing arrangement for a conference call bridge arrangement

Peter J. Armbruster; Bradley R. Schaefer; Mark L. Shaughnessy


Archive | 1999

Load based cache control for satellite based CPUs

Jose A. Laboy; Bradley R. Schaefer


Archive | 1996

Method and apparatus for adaptive routing in a satellite-based communication system

Dean Paul Vanden Heuvel; Brent Matthew Mckay; Bradley R. Schaefer; James William Bishop


Archive | 2003

Method and apparatus for interworking dispatch services network

Nandakishore A. Albal; Peter J. Armbruster; Thomas G. Hallin; Bradley R. Schaefer; Mark L. Shaughnessy; Steven D. Upp; William R. Worger; George Xenakis


Archive | 2002

Session initiation protocol compression

William R. Worger; Peter J. Armbruster; Bradley R. Schaefer; Mark L. Shaughnessy

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