A fluid–kinetic hybrid electron model for electromagnetic simulations of finite-b plasmas is developed based on an expansion of the electron response using the electron–ion mass ratio as a small parameter. ~Here b is the ratio of plasma pressure to magnetic pressure.! The model accurately recovers low frequency plasma dielectric responses and faithfully preserves nonlinear kinetic effects ~e.g....

In this research, a response surface methodology (RSM) was used to investigate the effects of independent parameters (pH, contact time, temperature, adsorbent dosage, and initial concentration of pollutant), their simultaneous interactions, and quadratic effects on crystal violet adsorption onto two starch based materials in the form of batch experiments. The characterizing results indicated th...

Contamination of water resources with petroleum products is a serious environmental problem. The current study was carried out to investigate the effect of using raw and heat activated red mud (RM) as adsorbent to remove insoluble fraction of gasoline from aqueous solution. Some parameters such as pH, contact time, adsorbent dose and initial concentration were optimized in adsorption process to...

Background Improving efficiency of health sector is of particular importance in all countries. To reach this end, it is paramount to measure the efficiency. On the other hand, there are many factors that affect the efficiency of health systems. This study aimed to measure the Technical Efficiency (TE) of health systems in Economic Cooperation Organization (ECO) countries during 2004–10 and to d...

the investigation of dimensional efficiency for branches of maskan bank in resources collection and facilities allocation: approach of super efficiency model with weight restrictions. the scarcity of financial resources of banks, especially in developing countries like as iran, leads to planning for improving efficiency and productivity. improving efficiency needs to performance measurement and...

background: women and children form two-thirds of the country's population and the health of mothers and children is effective in improving the health of the entire community. using the experience of successful countries in the world in this field, can improve maternal and child health indicators in iran. objective: the present study aimed to improve maternal and child health services mana...

BACKGROUND The economic downturn exacerbates the inadequacy of resources for combating the worldwide HIV/AIDS pandemic and amplifies the need to improve the efficiency of HIV/AIDS programs. METHODS We used data envelopment analysis (DEA) to evaluate efficiency of national HIV/AIDS programs in transforming funding into services and implemented a Tobit model to identify determinants of the effi...