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Modern computer systems use concurrent and distributed processing, which is very diierent from the sequential processing of earlier systems. Concurrency and synchro-nisation in such systems have multiplied the diiculties associated with analysing their correctness and performance. Generalised Stochastic Petri nets (GSPNs) allow for a natural expression of(More)
PURPOSE To describe the sonographic findings observed in the testis in patients who have undergone testicle-sparing surgery and surgical biopsies. METHODS We reviewed the color Doppler sonographic findings from 14 patients after testicular interventions: 2 open biopsy procedures for infertility and 12 testicle-sparing surgical procedures (1 for(More)
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