CONTEXT Traditional measures of pregnancy intentions that are dichotomous and retrospective do not fully capture the complexity surrounding women's plans to become pregnant. METHODS During January-June 2008, 249 women aged 15-44 awaiting pregnancy test results at family planning clinics in Pittsburgh completed a survey containing both single- and multi-item measures of pregnancy intentions. C...

Multi-robot foraging has been widely studied in the literature, and the general assumption is that the robots are simple, i.e., with limited processing and carrying capacity. We previously studied continuous foraging with slightly more capable robots, and in this article, we are interested in using similar robots for item delivery. Interestingly, item delivery and foraging are two sides of the ...

On-demand broadcast is an effective wireless data dissemination technique to enhance system scalability and capability to handle dynamic data access patterns. Previous studies on time-critical on-demand data broadcast were conducted under the assumption that each client requests only one data item at a time. With the rapid growth of time-critical information dissemination services in emerging a...

Objectives: Data have been collected on self-rated health using a single question on how individuals rate their health in cross-sectional surveys carried out in a large number of countries. Doubts have been expressed about the validity of this measure and this was the main reason to undertake the current study. Study Design: Data of 21 cross-sectional surveys were analyzed derived from the Worl...