the object of this paper is to establish a summability factor theorem for summabilitya, , k  1 k  where a is the lower triangular matrix with non-negative entries satisfying certain conditions.

we obtain sufficient conditions for the series σanλn to be absolutely summable of order k by atriangular matrix.

researchers demonstrate that individuals in different levels of physical activity have different motivations for sport activity. this study was designed to examine how motivations can discriminate three physical activity levels (inactive, active, sustained maintainers) according to self-determination theory. 159 zanjan university staff (mean age: 33 years old) completed exercise motivation inve...

purpose this study was conducted to investigate risk factors of obesity and its associated health problems in adolescence in taiwan. methods we enrolled 559 adolescent volunteers with equal numbers of females and males in 2008. participants were divided into two groups: obese (body mass index [bmi] ≧95th percentile) and normal-weight adolescents (bmi: 15th ∼ 85th percentile). each of them compl...

objectives the aim of this study was to identify the relation between physical activity level and the structures of trans-theoretical model (ttm). materials and methods this cross-sectional study was conducted on 423 female students of tonekabon in iran. participants completed the demographic questionnaires, the ttm’s structural questionnaires as well as the international physical activity ques...

OBJECTIVES To identify factors that motivate adolescents to be physically active; to assess differences in motivators for groups at risk for physical inactivity, including girls vs boys, overweight vs nonoverweight youth, and youth with low vs high perceived sport competence; and to assess links between activity motivation and physical activity. DESIGN Cross-sectional study. SETTING A middl...