Reengineering Legacy Embedded Systems
Systems that require reengineering are a fact of life in both the commercial and military arenas. The authors have developed a systematic methodology based on virtual prototyping, with accompanying tools and libraries, for rapidly upgrading electronic systems.
Rapid Digital System Prototyping: Current Practice, Future Challenges
A top-down methodology that emphasizes modular, upgradable designs solves some problems with the current design process for application-specific signal processors. Virtual prototyping, model year architectures, and reuse-based design form the pillars of this new approach, which promises to raise industrial design productivity and competitiveness.
The distribution of 54-Mn in the enamel and dentine of the rat incisor.
Abstract The distribution of 54 Mn was studied in the lower incisors of rats. Autoradiograms show 54 Mn to be present in the enamel and dentine 5, 10 and 15 days after its administration. In the dentine, the radioisotope is first localized in a zone near to and encircling the pulp and later becomes more diffuse. Pre-existing as well as the newly formed enamel incorporates the isotope. In both enamel and dentine 54 Mn appears to be principally associated with the inorganic portion.