A number of interesting research problems arise from current attempts to incor ,orate abstraction mechanisms in programming languages. Sc~me of them are central issues in current research projects a~d others are direct extensions of current work. Several prol~lems in each of these areas are outlined below. A t h i r d section presents a series of speculations about how this ~vork might evolve i...

Jacques Monod, born 100 years ago, was one of the main founders of molecular biology. A quotation of Roger Stanier seems to me of immediate relevance to the topic of this meeting on ‘‘Chance and necessity in evolution,’’ dedicated to the works of Jacques Monod: ‘‘Jacques Monod, one of the great scientists of the twentieth century, will always have an honored place among the leaders of the secon...

Regular domestic work has been covered by the Federal old-age, survivors, disability, and health insurance (OASDHI) program since 1951. Domestic work covered by the program includes work performed by housekeepers, cooks, maids, waiters, butlers, valets, caretakers, babysitters, nursemaids, companions, governesses, gardeners, handymen, watchmen, and chauffeurs of family automobiles. In 1976, emp...

Various surveys conducted by the Social Security Administration have provided national estimates of the prevalence of work disability among the adult population. In the 1972 survey, the most recent, approximately 7.4 million persons, or 7 percent of the civilian noninstitutionalized population aged 20-64, reported severe disability, defined as the inability to work at all or the inability to wo...

No one really looks forward to getting a shot, but for the vast majority of people, vaccines are very safe. Some people experience mild side effects like soreness after receiving a vaccine, and rarely people report more serious problems. In your case, the best course of action is to tell your health provider about your previous symptoms, and then follow the provider's advice for future vaccinat...