87,467 research outputs found
Behavioral simulation of array processors in the APES environment
No full textAPES is an integrated, flexible CAD environment developed for behavioral design, simulation and evaluation of array processor architectures. This paper discusses in detail the core of the system, i.e., the behavioral simulator. This is an interactive subsystem which allows one to set up and run the simulation of the array using the definition of the array architecture supplied by the user. This task computes the output results of the whole array, of each processing element and of each functional unit. The concept of time is also defined and handled by the simulator so to allow subsequent performance evaluation. Functions are available for tracing, for inserting break- points, for step-by-step execution and for selection of display format. The simulator interacts with the other modules of APES (e.g., the Fault Injector, the Reconfiguration Manager) and produces results which can also be post-processed by other modules of APES (e.g., the Diagnostic Evaluator) to aid the designer in evaluating particular characteristics of the architecture
Hill-climbing heuristics for optimal hardware dimensioning and software allocation in fault-tolerant distributed systems
No full textAn optimum distributed architecture with fault-tolerance capabilities for a given software application may be obtained by allowing allocation algorithms to evolve without any existing-hardware constraint. Distributed software partitioning and allocation is done using the simulated annealing optimization algorithm. To define the cost function used by the optimization algorithm, a model for interacting processes constituting the software application is presented. Tuning of algorithm parameters has been considered to assure convergence at a reasonable cost in terms of computation time
(2S)-[3-(Anthracen-9-yl)-4,5-dihydroisoxazol-5-yl]methyl 2-[(tert-butoxycarbonyl)amino]propanoate
No full textThe synthesis of the (2S)-[3-(anthracen-9-yl)-4,5-dihydroisoxazol-5-yl]methyl 2-[(tert-butoxycarbonyl)amino]propanoate is obtained through the 1,3-dipolar cycloaddition of the stable anthracenenitrile oxide and the N-Boc protected (S)-alanine allyl ester as dipolarophile. The structure and the fluorescence properties are described upon the relative analytical and spectroscopic data
Lack of association between Chlamydia pneumoniae seropositivity and common carotid intima-media thickness in type 2 diabetic patients
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The ultrasonic characterization of myocardial hypertrophy: new prospects
No full textThe extensive use of ultrasound imaging in cardiology has greatly contributed to expand both its diagnostic possibilities and its utility in the interpretation of physiopathologic mechanisms. Conventional echocardiography is the more specific technique for the diagnosis of myocardial hypertrophy which, in turn, is one of the most important cardiovascular risk factors. The improvement of ultrasound technology may expand the possibility of noninvasive characterization of left ventricular hypertrophy by adding to the already known information about left ventricular mass and function, and that relative to the degree of hypertrophy-related fibrosis. In the present paper the authors reviewed the knowledge about biological and hemodynamic factors which contribute to the development and regression of myocardial hypertrophy. The possible role of new ultrasonic technology in the tissue characterization of myocardial hypertrophy is also discussed
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