We identify a family of binary codes whose structure is similar to Reed-Muller (RM) and which include RM as strict subclass. The in this are denoted Cn ( xmlns:xlink="http://www.w3.org/1999/xlink">r,m ), their duals xmlns:xlink="http://www.w3.org/1999/xlink">Bn ). ...

In the generalized Steiner tree problem, we find a minimumcost set of edges to connect a given set of source-sink pairs. In the online version of this problem, the source-sink pairs arrive over time. Agrawal, Klein, and Ravi [1] give a 2-approximation algorithm for the offline problem; Berman and Coulston [3] give an O(logn)-competitive algorithm for the online problem. Goemans and Williamson [...

Demand for less-skilled workers plummeted in developed countries in the 1980s. In open economies, pervasive skill-biased technological change (SBTC) can explain this decline. SBTC tends to increase the domestic supply of unskillintensive goods by releasing less-skilled labor. The more countries experiencing a SBTC, the greater its potential to decrease the relative wages of less-skilled labor b...

We deviate from the Berman et al. models in inventory with positive service time. We establish a necessary and sufficient condition for system stability. Several performance measures are computed. An optimisation problem is discussed. Our analysis suggests that it is optimal to place the replenishment order when the inventory level is positive (even in the zero lead time case). Numerical illust...