Parallel computing those that use concurrency, are more difficult to write than sequential ones, because concurrency introduces several new classes of potential software bugs, of which race conditions are the most common. Communication and synchronization between the different subtasks are typically some of the greatest obstacles to getting good parallel program performance. A theoretical upper bound on the speed-up of a single program as a result of parallelization is given by Amdahl's law. Traditionally, computer software has been written for serial computation. To solve a problem, an algorithm is constructed and implemented as a serial stream of instructions. These instructions are executed
What Alice Found on the highway under mysterious circumstances and a middle-aged "snowbird" couple in an RV come to her rescue, offering a ride all the way south. Before too long we're wondering if it wasn't the seemingly good Samaritans who sabotaged her car in the first place. "What Alice Found" is a complex story about mothers and daughters and the "haves and have-nots" in American society as Alice is turned into a truck stop prostitute. Critically acclaimed, "What Alice Found" was selected by "The New York Times"' Stephen Holden as a "Critic's Pick" and was praised by Kevin Thomas in the "Los