OBJECTIVES The aim of this study was to assess the prevalence of Temporomandibular Disorders (TMD), using the Research Diagnostic Criteria for TMD (RDC/TMD) in women with episodic and chronic migraine (M and CM), as well as in asymptomatic women. METHOD Sample consisted of 61 women, being 38 with M and 23 with CM, identified from a headache outpatient center; we also investigated 30 women wit...

BACKGROUND Prion protein (PrP) alleles associated with scrapie susceptibility persist in many sheep populations even with high frequencies despite centuries of selection against them. This suggests that scrapie susceptibility alleles have a pleiotropic effect or are associated with fitness or other traits that have been subject to selection. METHODOLOGY/PRINCIPAL FINDINGS We genotyped all lam...

Diversified firms can trade at a discount to a matched portfolio of single-segment firms either because diversified firms have lower expected cash flows or because they have higher expected returns. We analyze whether diversification-discount firms have higher expected returns in order to compensate investors for offering less upside potential (or skewness exposure) than focused firms. Our empi...

We discuss the Hamiltonian for a nonrelativistic electron with spin in the presence of a magnetic monopole and note that it is not self-adjoint in the lowest two angular momentum modes. We then use von Neumann's theory of self-adjoint extensions to construct a self-adjoint operator with the same functional form. In general, this operator will have eigenstates in which the lowest two angular mom...

e have developed a new spring force law which can be used in bead-spring chain models of the orm-like chain. The bead-spring chain has no bending potentials between the springs, and so iffers from the current models only in the functional form of the force law. This new model can ccurately represent a chain that contains many persistence lengths even if each spring represents nly a few persiste...

The Dirac equation for a massive spin-12 field in a central potential V in three dimensions is studied without fixing a priori the functional form of V . The second-order equations for the radial parts of the spinor wave function are shown to involve a squared Dirac operator for the free case, whose essential self-adjointness is proved by using the Weyl limit point-limit circle criterion, and a...