Leonard F. Wisniewski

Learn More
Habituation may be relevant for understanding how sensory stimuli influence factors related to ingestive behavior. In the first of three experiments in humans we showed that salivation and hedonic ratings to lemon or lime juice habituated within 10 presentations, and dishabituation of the salivation and hedonic ratings to the original juice were observed(More)
We give asymptotically equal lower and upper bounds for the number of parallel 1/0 operations required to perform BMMC permutations (defined by a characteristic matrix that is nonsingular over GF(2)) on parallel disk systems. Under the Vitter-Shriver parallel-disk model with N records, D disks, block size B, and M records of RAM, we show a universal lower(More)
Obese children 8-12 years old from 61 families were randomized to treatment groups that targeted increased exercise, decreased sedentary behaviors, or both (combined group) to test the influence of reinforcing children to be more active or less sedentary on child weight change. Significant decreases in percentage overweight were observed after 4 months(More)
We present the design and implementation of a parallel out-of-core sorting algorithm, which is based on Leighton's columnsort algorithm. We show how to relax some of the steps of the original columnsort algorithm to permit a faster out-of-core implementation. Our algorithm requires only 4 passes over the data, and a 3-pass implementation is possible.(More)
This study assessed the influence of introducing a new food after repeated presentations of one food on food consumption, hedonics, and salivation. Male subjects were provided repeated 150-calorie courses of pizza or cheeseburger until satiety. Hedonics and salivation were measured before each course. Subject were then provided an additional 450 calorie(More)
The present study examined the effects of calories on salivary habituation. The rate of habituation to lemon taste was studied over 10 trials in 24 normal weight, nondieting, 18-35-year-old females. Between each of the trials, half the subjects ate low calorie, lemon gelatin, total Kcal = 32, and the others ate high calorie, lemon gelatin, total Kcal = 320.(More)
Two types of eating disorders, bulimia nervosa in normal-weight bulimic (NWB) women and restricting-type anorexia nervosa (RAN), may provide insights into permissive or protective factors contributing to psychoactive substance use disorders (PSUD) in humans. These two eating disorders, while often grouped together, are at opposite extremes for rate of PSUD.(More)
—Research computing in the social sciences requires access to statistical software and quantitative tools that perform embarrassingly parallel computation at moderate scale, large memory to fit entire data sets, and secure storage for potentially confidential data. The Research Computing Environment (RCE) was designed as a three-tier system to satisfy these(More)
OBJECTIVE Bulimia nervosa (BN) patients have been shown to experience anomalous responses to food and food cues. We investigated the response to food over time by presenting repeated food cues and measuring changes in physiological (ie, salivation) and subjective responses. METHOD Subjects were 18 BN women and 18 matched control women. Two palatable food(More)