It is well known that a sum (coproduct) of a family {Xi : i ∈ I} of Priestley spaces is a compactification of their disjoint union, and that this compactification in turn can be organized into a union of pairwise disjoint order independent closed subspaces Xu, indexed by the ultrafilters u on the index set I. The nature of those subspaces Xu indexed by the free ultrafilters u is not yet fully u...

Median U-turn intersection treatment (MUTIT) has been considered an alternative measure to reduce congestion and traffic conflict at intersection areas. The MUTIT is sometimes difficult to implement in the field because it requires wide median on arterials for U-turn vehicles. The objective of this study is to introduce an unconventional U-turn treatment (UUT) for intersections which requires l...

A common criticism of repeated and dynamic game theoretic models of government policy is that they exhibit a large multiplicity of equilibria making them di cult to test and falsify. Fudenberg-Levine (1989) show that when a large patient player plays against a sequence of short lived players who are uncertain as to the large player's type, the ability of that player to build a reputation may si...

Most of the cells in the embryonic peripheral nervous system (PNS) of Drosophila are born in their final location. One known exception is the group of lateral chordotonal organs (lch5) whose precursors form in a dorsal position, yet the mature organs are located in the lateral PNS cluster. Mutations in the u-turn (ut) locus perturb the localization of lch5 neurons and result in a 'dorsal chordo...

While Pennsylvania voters were narrowly giving George Bush that state’s Republican primary victory, Ronald Reagan appeared here in a brief campaign stop which included a 55 minute speech/ “ dialogue” and a ten minute press conference, all in Moreau Hall, Saint Mary’s. Reagan said he welcomed the Democrats and Independents in the crowd, which numbered about 600, half of whom were area residents,...

Alternating sign matrices with a U–turn boundary (UASMs) are a recent generalization of ordinary alternating sign matrices. Here we show that variations of these matrices are in bijective correspondence with certain symplectic shifted tableaux that were recently introduced in the context of a symplectic version of Tokuyama’s deformation of Weyl’s denominator formula. This bijection yields a for...

Hamiltonian Monte Carlo (HMC) is a Markov chain Monte Carlo (MCMC) algorithm that avoids the random walk behavior and sensitivity to correlated parameters that plague many MCMC methods by taking a series of steps informed by first-order gradient information. These features allow it to converge to high-dimensional target distributions much more quickly than simpler methods such as random walk Me...

The recent resurgence of income inequality in some of the advanced industrial societies has spawned a wide-ranging debate as to the impact on inequality of an increasingly integrated world economy, typified by growing capital mobility, heightened competition in international markets, and a swelling of migration flows. This study represents one of the first systematic, cross-national examination...

This paper provides characterization theorems for preferences that can be represented by U(x1, ..., xn)=min{xk}, U(x1, ..., xn)=max{xk}, U(x1, ..., xn)=; u(xk), or combinations of these functionals. The main assumption is partial separability, where changing a common component of two vectors does not reverse strict preferences, but may turn strict preferences into indifference. We discuss appli...