The purpose of this study was to examine the effect of a structured, playful activity program on the development of social skills in kindergarten children during break time in the schoolyard. Twenty eight boys and thirty two girls aged from 5 to 6 years old consisted the sample of the present study. The participants were randomly divided into two groups the treatment and the control group respectively. The experimental group participated in a 4 weeks playful program while control group didn't participate in any kind of structured activity. Data were gathered through observations and videotaped recordings of the students in the schoolyard during breaks. The researcher coded children's behaviours from video recordings and completed the Social Skills Rating System (SSRS) for each child, before and after interventional program. Results demonstrated that there was statistically significant difference between the degree of development in students' social skills during breaks and their participation in a structured programme of playful activities in the schoolyard.
Water pressure management in a water distribution network (WDN) is a key component applied to achieve desirable water quality as well as a trouble-free operation of the network. This paper presents a hybrid, two-stage approach, to provide optimal separation of a WDN into District Metered Areas (DMAs), improving both water age and pressure. The first stage aims to divide the WDN into smaller areas via the Geometric Partitioning method, which is based on Recursive Coordinate Bisection (RCB). Subsequently, the Student’s t-mixture model (SMM) is applied to each area, providing an optimal placement of isolation valves and separating the network in DMAs. The model is evaluated on a realistic network generated through Watergems and is compared against one variation of it implemented, including the Gaussian Mixture Model (GMM) as well as the Genetic Algorithm (GA) approach, obtaining impressive performance. The implementation of both stages was deployed in a MATLAB environment through the Epanet toolkit. The proposed system is very promising, especially for large size WDNs due to the decreased running time and noteworthy reduction of pressure and water age.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.