abstract background: the university student health surveillance system can play a key role in the health promotion of the educated class of the society. this can be done through collecting information related to health and using it for screening and prevention of disease. hence, this article will be based on the necessity of existence of such system. materials and methods: we used interview and...

Consider a two-level inventory system consisting of one supplier and one retailer. The retailer faces a Poisson demand with a known rate and applies base stock (one-for-one ordering) policy. That is, his inventory position is set to a pre-determined level, so the demand pattern is transferred exactly to the supplier. The supplier has an inventory system and a service unit with exponentially dis...

BACKGROUND Access to health services is in part defined by the spatial distribution of healthcare equipment. To ensure equity in the provision of health services, it is important to examine availability across different health care providers taking into account population demand. Given the importance of the equitable provision of health equipment, we evaluate its spatial distribution in Brazil....

With the development of restructured power systems and increase of prices in some hours of day and increase fuel price, demand response programs were noticed more by customers. demand response consists of a series of activities that governments or utilities design to change the amount or time of electric energy consumption, to achieve better social welfare or some times for maximizing the benef...

background one common challenge to social systems is achieving equity in financial contributions and preventing financial loss. because of the large and unpredictable nature of some costs, achieving this goal in the health system presents important and unique problems. the present study investigated the household financial contributions (hfcs) to the health system.   methods the study investiga...