BACKGROUND Registration of patients with substance use disorders is of key importance to get insights and to study trends in patients characteristics and substance use patterns. The Treatment Demand Indicator (TDI) is gathering this information at European level since 2000. In Belgium, this registration started at national level in 2011 and an increasing number of facilities of different types ...

Artificial Neural Networks (ANNs) are frequently used to predict various ecological processes and phenomenon related to water resources. Various ANN applications involve the prediction of water quality using various environmental parameters. This paper discusses the use of two environmental data sets from two sampling sites, merged together and applied to forecasting a dependent variable, namel...

Often, economic policies are directed toward outcomes that are measured as counts. Examples of economic variables that use a basic counting scale are number of children as an indicator of fertility, number of doctor visits as an indicator of health care demand, and number of days absent from work as an indicator of employee shirking. Several econometric methods are available for analyzing such ...

objective: economic analysis was performed for the main horticultural crops in buin zahra (pistachio, peach, nectarine, and apple). there were dependent and independent variables in this research. methods: the independent variables were planting method (mechanized and conventional), land area used for fruit production, and land ownership. the maximum energy used, mostly in the form of fossil fu...

Consider a set of communication requests in a multichannel wireless network, each of which is associated with a traffic demand of at most one unit of transmission time, and a weight representing the utility if its demand is fully met. A subset of them is said to be feasible if they can be scheduled within one unit of time. The problem Maximum-Weighted Feasible Set (MWFS) seeks a feasible subset...

The paper studies the energy behavior of a battery-electric bus (BEB) operating on commercial routes as well technical feasibility total replacement current public transport fleet by BEBs in an Andean city. electrical variables BEB charging process are evaluated obtaining THD distortions less than 4%, values that meet national and international standards. Regarding demand, study uses estimate a...

In this paper we present a finite horizon single product single machine production problem. Demand rate and all the cost patterns do not change over time. However, end of horizon effects may require production rate adjustments at the beginning of each cycle. It is found that no such adjustments are required. The machine should be operated either at minimum speed (i.e. production rate = demand r...

We study optimal procurement mechanisms for a financially constrained buyer subject to ex post incentive compatibility and individual rationality. In our setup, a buyer who has a fixed budget wishes to purchase a homogeneous product up to a maximum demand amount. We characterize the optimal mechanism when the budget constraint always binds and when the maximum demand constraint always binds. Wh...