Hydrodynamic-type systems describing 2-dimensional polynomially integrable geodesic flows

Starting from a homogeneous polynomial in momenta of arbitrary order we extract multi-component hydrodynamic-type systems which describe 2-dimensional geodesic flows admitting the initial polynomial as integral. All these hydrodynamic-type systems are semi-Hamiltonian, thus implying that they are integrable according to the generalized hodograph method. Moreover, they are integrable in a constructive sense as polynomial first integrals allow to construct generating equations of conservation laws. According to the multiplicity of the roots of the polynomial integral, we separate integrable particular cases

The Financial, Legal, and Political Context of Private Education

Five principles underlie the changing policy architecture of American K-12 education. The author discusses these principles; how they are blurring the traditional demarcation of public and private schools; and the implications of this discussion for a private education research agenda

The Catholic Imagination and Its Relationship to Catholic Social Theory

One of the abundantly fruitful acquisitions of post-conciliar Catholic Christianity is the highly complex and pluralistic articulation of religious possibilities emerging out of a renewed and rigorous study of its heritage. Rather than a lifeless body of propositions, this past is more and more approached and seen to be a rich, living reality in need of critical reapportionment. While this activity is discomforting and disconcerting for some individuals and even vigorously opposed by others, there is little doubt that this mining of the multiplicity of riches will continue. From a general theological point of view, one area proving to be particularly productive is the on-going dialogue concerning those unique areas of emphasis peculiar to Catholicism. This discussion is reaching such a point that in outlining what he views as Catholicism\u27s essential traits the distinguished American Protestant theologian Langdon Gilkey writes: What ... a restructuring of these ... essential traits ... might look like, only a Catholic can or should say. But a sympathetic observer may well state that this is where the hope of a revitalized Christianity probably lies. What is it that Gilkey sees in Catholicism that leads him to such an assertion? What does he think is the underlying vision that defines the uniqueness of the Catholic religious horizon? And for the purposes of this paper, in what ways does this uniqueness function so as to shape the way Catholicism views society? It is the purpose of this paper to address these issues

The Catholic High School and American Educational Reform: Challenges and Opportunities

This paper provides answers to two questions. First, what challenges and opportunities does the movement to reform American public education, and to make it more accountable, raise for Catholic high schools? Second, what challenges and opportunities does the effectiveness of Catholic high schools in educating disadvantaged students raise for American public education

Axial Flux Permanent Magnet Synchronous Generators for Pico Hydropower Application: A Parametrical Study

A pico hydropower plant is an energy harvesting system that allows energy production using the power of the water flowing in small watercourses, and in water distribution network. Axial Flow Flux Permanent Magnet Synchronous Generator (AFPMSG) are particularly suitable for this application, being efficient machines that achieve high power with small dimensions. This paper presents a parametrical study of several configurations and topologies of three-phase and single-phase AFPMSG, for pico hydropower application, to assess the most suitable dimensional characteristics for the most energy production using a safe voltage of 25 V. The AFPMSGs here considered has a simple single stator and rotor configuration, commercial-type permanent magnets, and concentric windings, to facilitate their cost-effective construction and the spread of their use also in developing countries. For each AFPMSG considered, the power output was calculated using 3-D modelling and Finite Element Analysis; besides, the different parameters and features that affect the power output were evaluated at different rotational speeds. The results achieving a power density up to 100 W/cm(3), at 1000 rpm with energy produced to 1.7 kWh/day

Nuclear safety regulation

Includes bibliographical reference