farid mousavi

Time-cost-quality trade-off project scheduling problem is one of the most important and practical problems in project management discipline. Project Managers interest in making decisions to accomplish the project with minimum cost, minimum time, and maximum quality. Unfortunately, in real life problems, the estimation of time, cost, and quality may be mixed with uncertainty. These parameters may be far from their estimated values. So, considering uncertain parameters in time-cost-quality project scheduling is essential. In this paper, a probabilistic version of time-cost-quality trade –off problem is proposed. Some parameters of the proposed model are assumed to be probabilistic. The probabilistic nature of the proposed model is handled using stochastic chance constraint programming. The multi-objective nature of the problem is handled using goal programming. Finally, the stochastic chance constraint goal programming is proposed. The deterministic equivalence of proposed stochastic model is presented. A numerical example is analyzed using GAMS software and results are investigated.

Balance is an integral part of most daily activities and is also a determining factor in assessing the functional ability of athletes. The aim of this study was to investigate the effect of a selected TRX training course on static and dynamic balance of female athletes.

Twenty female athletes were randomly divided into two equal groups of 10 control and experimental subjects. Before and after the training protocol, static balance (BESS balance error test) and dynamic balance (Y balance test) were evaluated. The experimental group then performed their TRX exercises for eight weeks (three sessions per week). Independent dependent t-test was used to analyze the data.

Findings showed that there was a significant difference in static balance and dynamic balance before and after exercise in the experimental group.

Based on the findings of the present study, it can be stated that TRX exercises improve the static and dynamic balance of female athletes. Therefore, this type of training can be included as an important factor in improving balance and also preventing sports injuries in designing their training programs.