Improved ion exchange membrane

Membrane, made from commercially-available hollow fibers, is used in reverse osmosis, or dialysis. Fiber has skin layers which pass only small molecules. Macromolecules cannot penetrate skin. Fibers can also be used to remove other undesirable anions, such as phosphate, sulfate, carbonate, and uranium in form of uranium-sulfate complex

Ion-exchange hollow fibers

An ion-exchange hollow fiber is prepared by introducing into the wall of the fiber polymerizable liquid monomers, and polymerizing the monomers therein to form solid, insoluble, crosslinked, ion-exchange resin particles which embed in the wall of the fiber. Excess particles blocking the central passage or bore of the fiber are removed by forcing liquid through the fiber. The fibers have high ion-exchange capacity, a practical wall permeability and good mechanical strength even with very thin wall dimensions. Experimental investigation of bundles of ion-exchange hollow fibers attached to a header assembly have shown the fiber to be very efficient in removing counterions from solution

Quantum theory of large amplitude collective motion and the Born-Oppenheimer method

We study the quantum foundations of a theory of large amplitude collective motion for a Hamiltonian expressed in terms of canonical variables. In previous work the separation into slow and fast (collective and non-collective) variables was carried out without the explicit intervention of the Born Oppenheimer approach. The addition of the Born Oppenheimer assumption not only provides support for the results found previously in leading approximation, but also facilitates an extension of the theory to include an approximate description of the fast variables and their interaction with the slow ones. Among other corrections, one encounters the Berry vector and scalar potential. The formalism is illustrated with the aid of some simple examples, where the potentials in question are actually evaluated and where the accuracy of the Born Oppenheimer approximation is tested. Variational formulations of both Hamiltonian and Lagrangian type are described for the equations of motion for the slow variables.Comment: 29 pages, 1 postscript figure, preprint no UPR-0085NT. Latex + epsf styl

Exploratory investigation on the measurement of skin friction by means of liquid crystals

Direct measurement of skin friction in wind tunnel testing by using cholesteric liquid crystal

Single Boson Images Via an Extended Holstein Primakoff Mapping

The Holstein-Primakoff mapping for pairs of bosons is extended in order to accommodate single boson mapping. The proposed extension allows a variety of applications and especially puts the formalism at finite temperature on firm grounds. The new mapping is applied to the O(N+1) anharmonic oscillator with global symmetry broken down to O(N). It is explicitly demonstrated that N-Goldstone modes appear. This result generalizes the Holstein-Primakoff mapping for interacting boson as developed in ref.[1].Comment: 9 pages, LaTeX. Physical content unchanged. Unnecessary figure remove

Marketing and the Common Good: Implications of \u3cem\u3eCaritas in Veritate\u3c/em\u3e

This paper extends the authors’ previous work on applying Catholic Social Teachings to issues in marketing to the specific question of the common good. Approaches to studying the social impact of marketing and the challenge of adequately defining the common good are discussed. Attention is next given to key vectors of Catholic Social Teaching and their application to ethical issues in marketing. The focus of the analysis is on specific sections in Caritas in Veritate, Pope Benedict XVI’s recent encyclical devoted to providing principles for dealing with the ongoing global economic crisis. A discussion of how these principles might be applied to business and public policy follows. We close with an evaluation of this application

Ethical Marketing: A Look on the Bright Side

This article offers an alternative to conventional approaches to ethical analysis in business and marketing. We submit that studying companies with exemplary records of ethical conduct and social responsibility offers useful and compelling guidance to marketing students and managers. It provides another needed perspective beyond simply examining examples of misconduct or offering normative advice that may not reflect the specifics of corporate situations. Based on examples presented in a recent text by the authors and Better Business Bureau Torch Awardees, we present information on thirteen companies of varying size and from several different industries. That information includes ethics policies, management practices, environmental practices, and company reputation. From these examples, we draw lessons that should offer ethical guidance to marketing managers