7,672 research outputs found

    Some spectral equivalences between Schrodinger operators

    Full text link
    Spectral equivalences of the quasi-exactly solvable sectors of two classes of Schrodinger operators are established, using Gaudin-type Bethe ansatz equations. In some instances the results can be extended leading to full isospectrality. In this manner we obtain equivalences between PT-symmetric problems and Hermitian problems. We also find equivalences between some classes of Hermitian operators.Comment: 14 page

    Development of an advanced composite aileron for the L-1011 transport aircraft

    Get PDF
    Significant improvements in structural efficiency can be achieved by the utilization of advanced composites for construction of aircraft secondary structures. Careful evaluation of alternate designs and materials for the L-1011 advanced composite inboard aileron has led to the selection of several unique material combinations and easily manufactured structural configurations. The advanced composite aileron is a direct replacement for the metal aileron with a weight savings of 23 percent. Due to the configurational simplicity of the components within the composite aileron, and because it contains 50 percent fewer parts and fasteners than the metal aileron, it is predicted that the composite aileron will be cost competitive with the metal aileron in a production environment. Structural analysis of the composite aileron, in conjunction with the design data, concept verification, and ground tests, indicates that the composite aileron design meets or exceeds structural requirements

    Complex WKB Analysis of a PT Symmetric Eigenvalue Problem

    Full text link
    The spectra of a particular class of PT symmetric eigenvalue problems has previously been studied, and found to have an extremely rich structure. In this paper we present an explanation for these spectral properties in terms of quantisation conditions obtained from the complex WKB method. In particular, we consider the relation of the quantisation conditions to the reality and positivity properties of the eigenvalues. The methods are also used to examine further the pattern of eigenvalue degeneracies observed by Dorey et al. in [1,2].Comment: 22 pages, 13 figures. Added references, minor revision

    A Comparative Study of Legal Ideology: African Land Tenure Systems

    Get PDF

    Sovereignty and Water Resources

    Get PDF

    Toward Optimal Utilization of Water Resources: The “Physical Solution

    Get PDF
    18 pages

    Notes for an Environmental Law Course

    Get PDF

    Sustaining Aquifer Productivity

    Get PDF
    12 pages. Includes full text of the Owens Valley Groundwater Management Referendum Measure A, which is an ordinance to regulate the extraction of groundwater within the Owens Valley groundwater basin

    The Public Trust Doctrine: Conflict with Traditional Western Water Law?

    Get PDF
    24 pages. Contains references
    corecore