Showing papers on "Testbed published in 1977"
01 Apr 1977
TL;DR: The author identifies the integrity problems posed by a secure military computer utility and integrity policies addressing these problems are developed and their effectiveness evaluated.
Abstract: : An integrity policy defines formal access constraints which, if effectively enforced, protect data from improper modification. The author identifies the integrity problems posed by a secure military computer utility. Integrity policies addressing these problems are developed and their effectiveness evaluated. A prototype secure computer utility, Multics, is then used as a testbed for the application of the developed access controls.
1,185 citations
01 Nov 1977
21 citations
01 Jun 1977
TL;DR: The purpose of this study and breadboard development program was to provide an understanding of the performance of networks which utilize equipment employing pulse stuffing synchronization and the development of a breadboard testbed.
Abstract: : The purpose of this study and breadboard development program was to provide an understanding of the performance of networks which utilize equipment employing pulse stuffing synchronization. The study was divided into two phases. Phase I covered (a) analytical investigations of jitter characteristics, (b) recommended jitter specification formulation and (c) development of a breadboard testbed. Phase II covered testbed evaluation and experimentation. The Phase I study approach consisted of developing three tools to study the jitter problem: (a) mathematical models,, (b) a software simulator and (c) a breadboard testbed. In Phase II RMS and peak-to-peak jitter data were collected and analyzed for various system design parameter inputs. The output data of the test and evaluation phase were compared with the analysis simulation results. Descriptions of the analysis tools, experiments, and results for both phases are included in this report. (Author)
2 citations
01 Feb 1977
TL;DR: A microprocessor based vehicular engine control system testbed has been developed to make possible complex, interactive engine control experiments in the vehicle environment.
Abstract: A microprocessor based vehicular engine control system testbed has been developed to make possible complex, interactive engine control experiments in the vehicle environment. Designed for flexibility, the on-board vehicle system incorporated two microprocessors, a variety of engine instrumentation, and controls over spark advance, airfuel ratio, and exhaust gas recirculation. The two microprocessors have been linked to form an efficient computational network with sufficient capacity to implement most, if not all, engine control experiments. Also included in the vehicle are video displays which provide operator control and interaction with experimental engine control systems. /GMRL/