a methodology is presented in this paper to find optimal location and dosage of chlorine injection in water distribution networks. the objective is to minimize the chlorine consumption while keeping the residual chlorine at each node within the standard range. unfortunately because of wrong water quality management in water distribution networks in many parts of the world, many problems such...

the aim of this paper is to identify the quality factors of business to business (b2b) electronic commerce applications. having in mind the above-mentioned goal, a model will be developed in three phases. at the first stage, well-known software quality models are studied for choosing a model as the basis and using the quality factors of web applications and through referring to the quality char...

air pollution is one of the major threats to environment in the present time. increase in degree of urbanization is a major cause of this air pollution. due to urbanization, vehicular activities are continuously increasing at a tremendous rate. mobile or vehicular pollution is predominantly degrading the air quality worldwide. thus, air quality management is necessary for dealing with this seve...

a methodology is presented in this paper to find optimal location and dosage of chlorine injection in water distribution networks. the objective is to minimize the chlorine consumption while keeping the residual chlorine at each node within the standard range. unfortunately because of wrong water quality management in water distribution networks in many parts of the world, many problems such as...

background & aim : heart failure is one of the most common cardiovascular diseases which decreases the quality of life. most of the factors influencing quality of life can be modified with ongoing educational interventions. inadequate teaching is one of the causes of low health outcomes. therefore, this study examined the effects of a roy’s adaptation model (ram) based on quality of life of pat...

abstract background: some studies have shown significant changes in quality of life due to menopausal status. a large number of factors, including psycho-social factors, have been found to be associated with quality of life. the aim of this study was to investigate factors affecting quality of life among postmenopausal women in isfahan based on behavioral analysis phase of precede model. method...

this study aimed to empirically develop a reliable and valid model specifically for measuring service quality of sport conferences as sport event tourism. to assess the model which has been established based on the survey, data gathered from 136 of attendees in sport conference. finding of this study showed that participants form their service quality perceptions based on their evaluations of 4...

human activities in the recent years have considerably increased the rate of water pollution in many regions of the world. in this case study, the main sources of wastewater discharging into the gargar river were identified. using river and point source flow rates and water quality parameters measured along the river, the river water quality was simulated using a commonly used, one-dimensional ...

determination of the amount of sugar in sugar beet is usually accomplished by polarimetric method in sugar industry. this method is not accurate due to impurities such as sodium, potassium and amino-nitrogen that are present and might cause some errors in the evaluation of the technical quality of sugar beet. in this research, 7309 samples of sugar beet from two semi- arid county, isfahan and c...