Eric L. Savage

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1. Event-Graph Models Event graphs were introduced by Schruben (1983) to develop simulations of discrete-event systems. The system dynamics are characterized by events that change the state of the system and the logical and temporal relationships among these events. Their utility and many examples are discussed in Schruben (1995). An event-graph model(More)
The cancellation of previously scheduled events not only results in a model running less efficiently, it precludes the application of some analysis techniques such as infinitesimal perturbation analysis. While same simulation languages (SIMSCRIPT, SIGMA) include an explicit facility for event cancellation, others do not (SLAM, GPSS, SIMAN). From computation(More)
BACKGROUND To address the public health crisis of overweight and obese preschool-age children, the Nutrition And Physical Activity Self Assessment for Child Care (NAP SACC) intervention was delivered by nurse child care health consultants with the objective of improving child care provider and parent nutrition and physical activity knowledge, center-level(More)
OBJECTIVES To develop a new measure of parental discipline of children encompassing a broad array of types of discipline and modes of administration. METHODS Parents of 12- to 19-month-old children were interviewed using a new 45-item structured survey about discipline in general pediatric clinics in North Carolina and Alabama. Demographic data describing(More)
Generalized Semi-Markov Processes (GSMPs) are usually described by sets of variables, events and clock distributions. This kind of representation often lacks intuitive appeal. In this paper we propose a mapping from GSMPs to Event Graph Models. This mapping allows us to use an event graph to visualize a GSMP model as an intermediate step to implemcniation.(More)
OBJECTIVE The objective of this study was to determine whether the installation of equipment for diaper-changing, hand-washing, and food preparation that is specifically designed to reduce the transmission of infectious agents would result in a decrease in the rate of diarrheal illness among children and their teachers in child care centers. METHODS(More)
OBJECTIVE To determine how discipline practices changed over time for young children. METHODS A cohort of parents with young children were interviewed in clinic about a broad array of disciplinary practices at two points in time. RESULTS A total of 182 parents were interviewed at Time 1, and 94 were interviewed at Time 1 and 2. Mean age of the child was(More)
OBJECTIVE To assess the effects of daily consumption of a synbiotic yogurt drink on the health, growth, and quality of life of healthy children 12-48 months of age in out-of-home child care. STUDY DESIGN Healthy children attending child care centers were enrolled in a prospective, double-blind, placebo-controlled clinical trial. The intervention was a(More)
BACKGROUND Physicians are encouraged to provide counseling regarding parental discipline. Quality counseling requires knowledge of disciplinary practices and factors that affect these practices. METHODS One hundred and eighty two parents of 12- to 19-month-old children from general pediatric clinics in North Carolina and Alabama were interviewed regarding(More)