background: exercise increases the generation of oxygen free radicals and lipid peroxidation that cause oxidative damage and result in muscle injury. vitamin c and, especially, vitamin e are shown to decrease the exercise-induced increase in the rate of lipid peroxidation. the aim of this study was to study antioxidant vitamins intake in athlete women who participant in sport saloon in two regi...

the twin deficits (budget deficit and current account deficit) have been argued in the economic literature since 1980s. this is a period in which the studies about budget deficit and the current account deficit were significantly increased in the united states. in the economic literature, there are two hypothesis: keynesian hypothesis and ricardian equivalence. the keynesian proposition confirm...

in this paper we investigate the effects of broadband infrastructure providing high speed internet, on economic growth in developing countries. we have used two different broadband measures to classify developing countries into two groups for the period 1999-2008. by using logistic diffusion model and iv approach, a nonlinear diffusion model is specified. differences in ceiling of diffusion cur...

Abstract With the development of high penetration renewable energy, power system has faced a big challenge low inertia and weak frequency support. This paper proposed two-stage robust mathematic optimization model with three layers to cope uncertainty in microgrids considering constraints. The controllable generators microgrid were modeled, including gas turbine, energy storage, demand response...

Taking a barber shop in Dezhou City of Shandong Province as an example, this paper calculates the required heat by using 300 liters 40 °C hot water every day, introduces working principle and system characteristics electric heater solar heater, selects mainstream products market, use cost. The comparison shows that price is low, but annual cost high; high, low.