We develop an approach to utilize anisotropic metamaterials to solve one of the fundamental problems of modern plasmonics--parasitic scattering of surface waves into free-space modes, opening the road to truly two-dimensional plasmonic optics. We illustrate the developed formalism on the examples of plasmonic refractor and plasmonic crystal, and discuss limitations of the developed technique an...

We introduce the problem of selecting patient-donor pairs in a kidney exchange program to undergo crossmatch test, and we model this selection as two-stage stochastic integer programming problem. The optimal solutions new formulation yield larger expected number realized transplants than previous approaches based on internal recourse or subset recourse. settle computational complexity by showin...

In this paper we present a parallel method for solving two-stage stochastic linear programs with restricted recourse. The mathematical model considered here can be used to represent several real-world applications, including ®nancial and production planning problems, for which signi®cant changes in the recourse solutions should be avoided because of their diculty to be implemented. Our paralle...

Evaluating the reliability of a system requires knowledge failure modes to which it is subject. Complex topology systems generally require high level availability, function arrangement elements (components) in system. To avoid serious failures for such complex systems, recourse can be had redundancy techniques available literature. These help improve reliability, without affecting components. T...

Algorithmic recourse recommendations inform stakeholders of how to act revert unfavorable decisions. However, existing methods may recommend actions that lead acceptance (i.e., the model's decision) but do not improvement underlying real-world state). To such is fooling predictor. We introduce a novel method, Improvement-Focused Causal Recourse (ICR), which involves conceptual shift: Firstly, w...

We consider modification of the recourse data, consisting of the second-stage parameters and the underlying distribution, as an approximation technique for solving two-stage recourse problems. This approach is applied to several specific classes of mixed-integer recourse problems; in each case, the resulting recourse problem is much easier to solve.

We consider modification of the recourse data, consisting of the second-stage parameters and the underlying distribution, as an approximation technique for solving two-stage recourse problems. This approach is applied to several specific classes of recourse problems; in each case, the resulting recourse problem is much easier to solve. Modification of recourse data is shown to be the common pri...