A deterministic, continuous time, nonstationary, multiproduct inventory model is formulated to find the number of joint replenishments, the order quantities, and the times at which orders should be placed which minimize the total cost over a finite time horizon. Both backlogging and no...

Since 1740 until now, the Book of Vine Branches encompasses beautiful pictorial representations of shoots and sprouts, collected every year on April 24th in the vineyards of the Hungarian town of Kőszeg. A long time series (1740–2009) of sprouts phenological development coded with the BBCH...

A prognostic index (PI) is usually derived from a regression model as a weighted mean of the covariates, with weights (partial scores) proportional to the parameter estimates. When a PI is applied to patients other than those considered for its development, the issue of assessing its validity on...