In this paper, we discuss an extension of split cuts that is based on widening the underlying disjunctions. That the formula for deriving intersection cuts based on splits can be adapted to this case has been known for a decade now. For the first time though, we present applications and computational results. We further discuss extensions of the existing theory with respect to cut strengthening...

This thesis describes describes a small number of problems arising from the applied study of networks in various contexts. The work can be split into two main areas: telecommunications networks (particularly the Internet) and road networks. In the area of telecom networks, this research focuses on current mathematical developments concerning long-range dependence (LRD). LRD is a statistical phe...

This paper approaches the problem of road extraction from three different directions. The first is the use of multiple scales. This combines detailed information of fine scale, like the markings, with abstract information of coarse scale, like the road network. The second direction is the extension of the multi-scale modeling with the context, i.e., the relations to other objects like buildings...

In crash frequency models, frequency by severity level are examined using multivariate count models. In these multivariate approaches the impact of exogenous variables is quantified through the propensity component of count models. The main interaction among variables across different severity levels is sought through unobserved effects i.e. there is no interaction of observed effects across th...

Singular Value Thresholding Algorithms for Low-rank Matrix Completion Jianfeng Cai, University of California at Los Angles, USA Low-rank matrix completion refers to recovering a low-rank matrix from a sampling of its entries. It routinely comes up whenever one collects partially filled out surveys, and one would like to infer the many missing entries. Matrix completion is a natural extension of...

Firms are increasingly interested in transport policies that enable a shift in cargo volumes from road (truck) transport to less expensive, more sustainable, but slower and less flexible transport modes like railway or inland waterway transport. The lack of flexibility in terms of shipment quantity and delivery frequency may cause unnecessary inventories and lost sales, which may outweigh the s...

       The binding of drugs by plasma proteins is an important phenomenon, because it influences the size of the free fraction of the drugs in plasma. In this study the influence of dipyridamole (DP) on the protein binding of propranolol (PL) and PL on the protein binding of DP were studied alone and in the presence of nicotine (NC).        The equilibrium dialysis was employed for protein bin...

This paper addresses a bi-modal multi-objective discrete urban road network design problem. The problem includes the simultaneous design of urban road and bus networks in urban areas in which the authorities play a major role in designing bus network topology. The road network design consists of decision making for lane additions to the existing streets, new street constructions, determining th...