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Spectral properties and the confinement phenomenon for the couplingH+V are studied, where H = −iα ·∇+mβ is the free Dirac operator in R and V is a measure-valued potential. The potentials V under consideration are given in terms of surface measures on the boundary of bounded regular domains in R. A criterion for the existence of point spectrum is given,(More)
BACKGROUND The aims of the present paper are: to reduce waiting time for treatment of patients with low back pain/cervical pain; to determine the degree of satisfaction of patients being treated by groups; and to determine whether there is correlation amongst satisfaction, improvement of pain and impact on the activities of everyday life. METHODS(More)
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