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Milwaukee, WI, United States

The Milwaukee School of Engineering is a private university located in downtown Milwaukee, Wisconsin. As of fall 2011, the university had an enrollment of more than 2,500 undergraduate and graduate students. Wikipedia.

Kuhfittig P.K.F.,Milwaukee School of Engineering
Acta Physica Polonica B | Year: 2010

This paper discusses the stability to linearized radial perturbations of spherically symmetric thin-shell wormholes with a "phantom-like" equation of state for the exotic matter at the throat: P = ωσ, ω < 0, where σ is the energy-density of the shell and P the lateral pressure. This equation is analogous to the generalized Chaplygin-gas equation of state used by E.F. Eiroa. The analysis, which differs from Eiroa's in its basic approach, is carried out for wormholes constructed from the following spacetimes: Schwarzschild, de Sitter and anti de Sitter, Reissner-Nordström, and regular charged black-hole spacetimes, followed by black holes in dilaton and generalized dilaton-axion gravity.

Yauch C.A.,Milwaukee School of Engineering
Journal of Manufacturing Technology Management | Year: 2011

Purpose - The purpose of this research was to construct a quantitative, objective metric for agility performance that assesses agility as a performance outcome, capturing both organizational success and environmental turbulence, and applicable to manufacturing organizations of all types. Design/methodology/ approach - The agility performance metric was developed by creating a theoretical model and then operationalizing the model through literature review, case studies, and pilot survey data. It was subsequently refined, based on input from an expert panel and survey responses. Findings - The agility performance metric is demonstrated using data from four manufacturing plants, which represent the four possible combinations of success and turbulence. Research limitations/implications - The agility metric developed is consistent with the theoretical model, as well as empirical evidence from the demonstration companies. Further validation of the metric is necessary to fully establish this approach as a valid and reliable assessment tool. Practical implications - This approach could be used by manufacturing managers to get a "snapshot" of an organization's agility performance level and to systematically consider the influence of environmental entities.Originality/ value - Consideration of agility as a performance outcome, rather than a structural or operational characteristic is a novel approach. The resulting quantitative performance index, which closely matches the theoretical definition of agility, is applicable to any type of manufacturing organization, can be used to make direct comparisons between manufacturers in different industries, and will automatically be updated over time as success is relative to industry medians. © Emerald Group Publishing Limited.

Kuhfittig P.K.F.,Milwaukee School of Engineering
Annals of Physics | Year: 2015

The theoretical construction of a traversable wormhole proposed by Morris and Thorne maintains complete control over the geometry by assigning both the shape and redshift functions, thereby leaving open the determination of the stress-energy tensor. This paper examines the effect of introducing the linear barotropic equation of state pr=ωρ on the theoretical construction. If either the energy density or the closely related shape function is known, then the Einstein field equations do not ordinarily yield a finite redshift function. If, however, the wormhole admits a one-parameter group of conformal motions, then both the redshift and shape functions exist provided that -3<ω<-1. In a cosmological setting, the equation of state p=ωρ, ω<-1, is associated with phantom dark energy, which is known to support traversable wormholes. The restriction -3<ω<-1 that arises in the present wormhole setting can be attributed to the assumption of conformal symmetry. © 2015 Elsevier Inc.

Muthuswamy B.,Milwaukee School of Engineering
International Journal of Bifurcation and Chaos | Year: 2010

This paper provides a practical implementation of a memristor based chaotic circuit. We realize a memristor using off-the-shelf components and then construct the memristor along with the associated chaotic circuit on a breadboard. The goal is to construct a physical chaotic circuit that employs the four fundamental circuit elements - the resistor, capacitor, inductor and the memristor. The central concept behind the memristor circuit is to use an analog integrator to obtain the electric flux across the memristor and then use the flux to obtain the memristor's characterstic function. © 2010 World Scientific Publishing Company.

Kuhfittig P.K.F.,Milwaukee School of Engineering
The European Physical Journal C | Year: 2014

A recent study by Rahaman et al. has shown that the galactic halo possesses the necessary properties for supporting traversable wormholes, based on two observational results, the Navarro-Frenk-White density profile and the observed flat rotation curves of galaxies. Using a method for calculating the deflection angle pioneered by V. Bozza, it is shown that the deflection angle diverges at the throat of the wormhole. The resulting photon sphere has a radius of about 0.40 ly. Given the dark-matter background, detection may be possible from past data using ordinary light. © 2014 The Author(s).

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