This paper introduces to the nite-state calculus a family of directed replace operators. In contrast to the simple replace expression, UPPER -> LOWER, de ned in Karttunen (1995), the new directed version, UPPER @-> LOWER, yields an unambiguous transducer if the lower language consists of a single string. It transduces the input string from left to right, making only the longest possible replace...

COMPLETE valvular replacement is the only feasible method for treatment of many cases of aortic valvular disease. While the long-term results will not be known for some time, the prognosis without operation, in carefully selected patients, is so poor as to justify this approach. Our total experience, consisting of a group of 16 such patients undergoing aortic replacement with the ballvalve pros...

Hormone-replacement therapy (HRT) has been available for many years, but the important question of its place in development and progression of breast cancer remains controversial; provision of reliable risk estimates has been hampered by a lack of controlled data. Observational evidence suggests that the risk of breast cancer may be increased only if HRT is used long term (ie, for longer than 1...

In view of the benefits of hormone replacement therapy (HRT) and the experience that only 10% of women maintain therapy, it is vital that all doctors are familiar with the pros and cons of HRT, so that women may be correctly advised. Here we discuss new issues and developments in HRT and current views on indications, complications and regimens of treatment.

a strategy employing moderate hypothermia for the replacement of the aortic arch is proposed to avoid the complications of profound hypothermic circulatory arrest. two patients underwent the complete replacement of the aortic arch using three pumps - for the brain, thoracoabdominal aorta, and heart, respectively. there were no complications and the patients were extubated uneventfully. the meth...

In this paper we derive some unbiased estimators of the population mean under simple inverse sampling with replacement, using the class of Hansen-Hurwitz and Horvitz-Thompson type estimators and the post-stratification approach. We also compare the efficiency of resulting estimators together with Murthy's estimator. We show that in despite of general belief, the strategy consisting of inverse s...