We present the COST-DISTANCE problem: finding a Steiner tree which optimizes the sum of edge costs along one metric and the sum of source-sink distances along an unrelated second metric. We give the first known randomized approximation scheme for COST-DISTANCE, where is the number of sources. We reduce several common network design problems to COST-DISTANCE, obtaining (in some cases) the first ...

Foam rolling (FR) durations totaling ?60 s per muscle are reported to acutely increase flexibility and vertical jump performance. However, limited research has investigated whether these benefits can outlast the inactive post-warmup preparatory period that typically separates warmups from start of sporting competition. Eleven male athletes (height 1.77 0.09 m, body mass 78.0 17.0 kg, age 22 2 y...

Crossover designs in clinical trials are very popular for comparing several non-curative treatments for their eecacy, while having each patient as his/her own control. Many investigators have constructed universally optimal designs for certain repeated measurement experiments. However, most of these statistically optimal designs have certain undesirable features from a clinical perspective. In ...

This article describes the process of building an effective primary prevention program using existing knowledge about developmental processes of adolescent girls. While many programs are described as ‘‘empirically based,’’ the process of developing an empirically based program often goes unreported. Using a primary prevention program for early adolescent girls, this article describes the cumula...