We present a new approach to the execution of functional logic programs. Our approach relies on definitional trees for the deterministic portions of a computation and on a graph transformation, called pull-tab, for the non-deterministic portions. This transformation moves, one level at a time, non-deterministic choices towards the root of the graph representing the state of a computation. With ...

We develop a polynomial time algorithm for the pull up transistor assignment problem and show that the interval selection and interval selection with pull up transistor assignment problems are N P hard. Heuristics for these problems are proposed and compared with that proposed in 1111.

Adult stem cells are not pampered pushovers. O'Reilly et al. report that certain stem cells take charge of their surroundings, molding their environment to control their division and differentiation. Some stem cells are cosseted like newborns. Neighboring cells cradle them in a structure called the niche. The niche not only nurtures its charges, it also dictates their behavior, determining whet...

[1] A sensitivity analysis reveals that large uncertainty exists in estimates of solute retardation factor R made from sorption push-pull tests. A simplified push-pull data interpretation method for estimating instantaneous linear sorption in confined aquifers is developed. The new method is less restrictive in its application than the conventional method that uses an approximate analytical sol...

We consider a variant of the well-studied gossip-based model of communication for disseminating information in a network. Classically, in each time unit, every node u is allowed to contact a single random neighbor v. If u knows the data (rumor) to be disseminated, node v learns it (known as push) and if node v knows the rumor, u learns it (known as pull). While in the classic gossip model, each...

BACKGROUND/PURPOSE The purpose of this study was to review the authors' 25-year experience with redo pull-through procedures for Hirschsprung's disease including surgical technique and long-term outcome. METHODS From 1974 to now, over 325 patients with Hirschsprung's disease have been treated at C.S. Mott Children's Hospital. This includes 30 patients referred after an unsuccessful pull-throu...