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Full-Text Articles in Engineering
Scan Loss Pattern Synthesis For Adaptive Array Ground Stations, William C. Barott, Mary Ann Ingram, Paul G. Steffes
Scan Loss Pattern Synthesis For Adaptive Array Ground Stations, William C. Barott, Mary Ann Ingram, Paul G. Steffes
Publications
We present several techniques for maximizing the contact time between low Earth orbiting satellites (LEOs) and a ground station (GS). The GS comprises an adaptive array of electronically steered space-fed lenses (SFLs). Each SFL is manufactured as a low-cost printed circuit with the result that it exhibits scanning loss. By differently orienting the boresights of the SFLs in the adaptive array, the SFL's scanning losses can be made to optimally complement the path loss of the LEO, thereby reducing the cost of the GS while maximizing the download capacity of the satellite link. The optimization, implemented with a genetic algorithm …
Hardware Certification For Real-Time Safety-Critical Systems: State Of The Art, Andrew J. Kornecki, Janusz Zalewski
Hardware Certification For Real-Time Safety-Critical Systems: State Of The Art, Andrew J. Kornecki, Janusz Zalewski
Department of Electrical Engineering and Computer Science - Daytona Beach
This paper discusses issues related to the RTCA document DO-254 Design Assurance Guidance for Airborne Electronic Hardware and its consequences for hardware certification. In particular, problems related to circuits’ compliance with DO-254 in avionics and other industries are considered. Extensive literature review of the subject is given, including current views on and experiences of chip manufacturers and EDA industry with qualification of hardware design tools, including formal approaches to hardware verification. Some results of the authors’ own study on tool qualification are presented.
Graduate Curricula In Software Engineering And Software Assurance: Need And Recommendations, T. B. Hilburn, Andrew J. Kornecki
Graduate Curricula In Software Engineering And Software Assurance: Need And Recommendations, T. B. Hilburn, Andrew J. Kornecki
Department of Electrical Engineering and Computer Science - Daytona Beach
In discussions about the development and use of computer systems and software products, the term “professional software engineer” is used repeatedly. In the last two decades there has been significant effort devoted to enhancing and advancing the state of professional software engineering (SwE) – new software engineering processes, methods, tools, and practices; creation of a software engineering body of knowledge [1]; development of a code of ethics and professional conduct [2], and software certification and licensing programs [3] . In 1989 the Software Engineering Institute (SEI) of Carnegie Mellon University published a landmark report on graduate education in software engineering …