Abstract The merits of a perturbation theory based on mean-to-osculating transformation that is purely periodic in the fast angle are investigated. exact separation perturbed Keplerian dynamics into short-period effects and long-period mean frequencies achieved by non-canonical transformation, which, therefore, cannot be obtained Hamiltonian methods. For this case, evolution elements strictly a...

The long-term success of a company’s ergonomics program is dependent upon a well-established foundation endorsed by leadership. Too many organizations have launched an ergonomics program without a strong foundation, only to have it “fizzle” when the business climate and direction change, or when key leaders change. Failure to start a program effectively results in loss of credibility and trust ...

Several psychological theories have been used to understand crime and delinquency. This literature review categorizes these perspectives into five areas, provides a brief overview of each, and analyzes and synthesizes the relevant, elements within each area. The major perspectives reviewed are learning theories, intelligence theories, personality theories, theories of psychopathy, and cognitive...

The Open Geospatial Consortium (OGC) Geography Markup Language (GML) explicitly represents geographical spatial knowledge in text mode. All kinds of fuzzy problems will inevitably be encountered in spatial knowledge expression. Especially for those expressions in text mode, this fuzziness will be broader. Describing and representing fuzziness in GML seems necessary. Three kinds of fuzziness in ...