this research was investigated to evaluate growth indices and competitive ability of two wheat ) triticum aestivum l. (cultivars in interference with two species of narrow and broad leaf weeds as two separated experiments based on a randomized complete block design with three replications at agricultural faculty of bu-ali sina university, during 2008-2009. in both experiments, alvand and sayson...

Designing a scheduling competition to attract researchers from the several fields interested in scheduling problems seems a challenging, and highly worthwhile effort. In this paper, we propose a design for one possible track of this proposed scheduling competition. Specifically, we propose a track aimed at one machine sequencing problems. We argue that any such track must include problems with ...

Several factors contribute to successful swim performance, but how are they affected by impaired vision? The purpose of this study was to examine the relationship between degree of visual impairment and performance variables during the 100m freestyle and backstroke events in Paralympic swimmers and to compare the performances with those of Olympic swimmers. A competition video analysis conducte...

The present study explored relationships between psychological skills, self-efficacy, and performance among soccer players participating in the Amputee World Cup. Players completed the Test of Performance Strategies (Thomas, Hardy, & Nelson, 1999). One hour before competition, participants completed a two-item self-efficacy measure designed to assess confidence in attaining performance goals fo...

Competitive learning is attracting ever increasing amounts of attention in the field of digital game-based learning. Different mechanisms for the promotion of competitive learning have been proposed in previous studies, including social-competition and self-competition mechanisms, but few have addressed student preferences as to the choice between social-competition and self-competition, especi...