Multi-leader-common-follower games arise when modeling two or more competitive firms, the leaders, that commit to their decisions prior to another group of competitive firms, the followers, that react to the decisions made by the leaders. These problems lead in a natural way to equilibrium problems with equilibrium constraints (EPECs). We develop a characterization of the solution sets for thes...

It is widely held that new ventures experience different kinds of problems as they grow and mature. This so-called life cycle or stage model of organizational growth has received considerable empirical support (Dodge & Robbins, 1992; Hanks & Chandler, 1994; Kazanjian, 1988; Kazanjian & Drazin, 1989). Most previous studies of the life-cycle model have identified or examined different types of pr...

Supported olefin polymerization catalysts can prevent reactor-fouling problems and produce uniform polymer particles. Constrained geometry complexes (CGCs) have less sterically hindered active sites than bis-cyclopentadienyl metallocene catalysts. In the literature, micrometer-sized silica particles were used for supporting CGC catalysts, which might have strong mass transfer limitations. This ...

Tri-level optimization problems are optimization problems with three nested hierarchical structures, where in most cases conflicting objectives are set at each level of hierarchy. Such problems are common in management, engineering designs and in decision making situations in general, and are known to be strongly NP-hard. Existing solution methods lack universality in solving these types of pro...

In this paper, we extend techniques developed in the context of Travelling Salesperson Problem for cycle problems. Particularly, study shrinking support graphs and exact algorithms subcycle elimination separation The efficient application considered has proved to be essential when solving large size problems by Branch-and-Cut, been motivation behind work. Regarding graphs, prove validity Padber...

This paper explores, via literature review and focus group discussions, the relative importance that Master Data Management (MDM) plays in the implementation and maintenance of ERP systems. The focus group included key players of large-scale ERP implementations and/or upgrades, from both an internal intra-company and consulting standpoint. The findings of the discussions resulted in practical a...

The construction industry plays a significant role in the economy of developing countries. The sector is, however, also one of the most hazardous with frequent accidents and health related problems. The purpose of this study is to examine the health and safety practices of construction small and medium-sized businesses (SMEs) in Ghana with a view to improving the health and safety performance o...

We study three covering problems in the plane. Our original motivation for these come from trajectory analysis. The first is to decide whether a given set of line segments can be covered by up four unit-sized, axis-parallel squares. second build data structure on efficiently answer any query subtrajectory coverable unit-sized third problem compute longest that two