Supply chain is an integrated system of facilities and activities. Gaining the optimum design of demand satisfaction network is one of the most important live issues in the decision making problems category. Most of previous studies considered unreal assumptions such as the lack of capacity constraints to satisfy demand in the network and in hubs. By considering the nature of the case that have...

Background and Objectives: Pharmaceutical expenditures are responsible for a major part of health systems’ cost. According to the WHO’s statistics, Iran is the first among the 20 countries in the world in terms of drug consumption. The first step in controlling consumption of a particular good is to identify factor inducing the relevant demands. Hence, this study aimed to identify the pattern a...

The importance of drug as a valuable export product in the global economy becomes more clear every day. Understanding the problems of exports and factors affecting it, can be an important step to keep Iran’s position in the world markets and further export development of this product.In this study, Iranian pharmaceutical exports’ supply and demand functions were calculated using co-integration ...

BACKGROUND Important unanswered questions remain on the impact of international sporting events on the sex industry. Speculation about increased demand and supply of sex work often generates significant attention, but also additional funding for HIV programmes. This study assessed whether changes occurred in the demand and supply of paid sex during the 2010 Soccer World Cup in South Africa. M...

This paper proposes a computational methodology to deal with the inventory management of new products by using the triangular distribution for both demand per unit time and lead-time. The distribution for demand during lead-time (or lead-time demand) corresponds to the sum of demands per unit time, which is difficult to obtain. We consider the triangular distribution because it is useful when a...

As the sharing economy has been increasing dramatically in the world, the mobile-hailed ridesharing companies like Uber and Lyft in the US, Didi Chuxing in China has begun to challenge traditional public transportation providers such as bus, subway or taxis. Ridesharing companies have shown their ability to provide the mobility services where public transit has failed. The human mobility demand...

Background The United States and Canada are experiencing an increased demand for licensed health professionals; currently both have shortages and maldistribution of licensed health professionals. The factor having the greatest impact in creating the shortage is the increased demand for services due to an aging population. The demand for technological advancements and too few licensed health pro...

The current scenario of the world is that the power demand in the world is increasing at a very fast rate, to get an economical source of power; renewable energy sources are proving out to be a reliable option. Hence solar energy systems are very much important for the system engineers. In order to meet the demand of the world the solar energy is injected into the electric power grid. Along wit...

become available, global mineral demand probably will focus on the same metals and minerals that are of interest today. Population will have a bigger effect on future mineral demand than the creation of new products and markets. Projections of future population range widely, depending on estimated fertility rates. For low fertility rates of 1.5 to 1.6 children per female, which are below the “r...

The life of many people in the world is under the danger because of the accidents and unpredicted diseases, which require relief. Since, most of such cases occur in unpredictable condition, for an appropriate planning, the uncertain conditions should be investigated. Consequently, this paper investigates the integrated and multi-step process of locating, assigning and routing the air and la...