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Journals and Conferences
We present an algorithm to solve the orbit-stabilizer problem for a polycyclic group G acting as a subgroup of GL(d,Z) on the elements of Qd. We report on an implementation of our method and use this to observe that the algorithm is practical.
Counter automata are more powerful versions of finitestate automata where addition and subtraction operations are permitted on a set of n integer registers, called counters. We show that the word problem of Z is accepted by a nondeterministic m-counter automaton if and only if m ≥ n.
Addition of fentanyl to bupivacaine administered for spinal anesthesia for cesarean delivery was evaluated in 56 ASA physical status 1 term parturients. Preservative-free saline was added to 0, 2.5, 5, 6.25, 12.5, 25, 37.5, or 50 micrograms fentanyl to make a 1 ml total volume, which was injected intrathecally prior to bupivacaine in a double-blind,… (More)
A total of 2,511 patients who received spinal anesthesia for cesarean delivery were observed for the development of postdural puncture headache (PDPH); 804 patients received a mixture of tetracaine and procaine, 942 received bupivacaine-glucose, and 765 received lidocaine-glucose. They were observed for the development of PDPH for a minimum of 72 h. PDPH… (More)
Pregnancy is associated with a wider dermatomal spread of local anesthetics after epidural and spinal anesthesia. This phenomenon also exists in the immediate postpartum period. The mechanism of this observation is unresolved. However, an increase in progesterone concentration in pregnancy has been implicated as one of the factors. Although plasma… (More)
The relationship of induction-to-delivery and uterine incision-to-delivery intervals to neonatal outcome was studied in 105 parturient women undergoing cesarean section. Sixty patients received general anesthesia and 55 were given spinal anesthesia. During general anesthesia, induction-to-delivery intervals of more than 8 minutes and uterine… (More)