a compact formulation of the set of tours neither in a graph nor its complement is presented and illustrates a general methodology proposed for constructing polyhedral models of decision problems based upon permutations, projection and lifting techniques. directed hamilton tours on n vertex graphs are interpreted as (n-1)- permutations. sets of extrema of birkhoff polyhedra are mapped to tours ...

Building new and flexible classes of nonseparable spatio-temporal covariances and variograms has resulted a key point of research in the last years. The goal of this paper is to present an up-to-date overview of recent spatio-temporal covariance models taking into account the problem of spatial anisotropy. The resulting structures are proved to have certain interesting mathematical properties, ...

In this contribution our aim is to present a multicriteria linguistic decision making model in which experts might provide their assessments by using linguistic expressions based on comparative terms close to the expressions used by human beings in real world problems or single linguistic terms. To aggregate such a type of linguistic information two symbolic aggregation operators are introduced...

This paper explores generating and conveying confidence in enterprise security. An enterprise assurance framework provides a structure enterprise assurance evidence that strengthens and clarifies the overall enterprise assurance argument. The structure and components of these arguments are defined and then applied to an enterprise. Finally, standards of evidence and evidence trade-offs are ment...

Using data from an e-voting experiment conducted in the 2005 Congressional Election in Argentina, we estimate the effect of different e-voting technologies on the likelihood that citizens cast their vote for different parties for the National Congress and the Legislature of Buenos Aires. Our results indicate that voters are extremely receptive to the information cues provided by the different v...