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New studies are documenting trophic cascades in theoretically unlikely systems such as tropical forests and the open ocean. Together with increasing evidence of cascades, there is a deepening understanding of the conditions that promote and inhibit the transmission of predatory effects. These conditions include the relative productivity of ecosystems,(More)
Purpose: To assess the clinical accuracy of whole-body 2-[F-18]-fluoro-2-deoxy-D-glucose-positron emission tomography (FDG-PET) in the diagnosis of recurrent colorectal carcinoma in comparison to conventional computed tomography (CT).Materials and methods: Forty patients with suspected recurrent colorectal carcinoma based on either progressive serial(More)
The Helmholtz-Kirchhoff integral and the Kirchhoff approximation are applied to model the penetration of sound waves into rough sandy seafloors at grazing angles above and below the critical angle. As the seafloor of interest is anisotropic, emphasis is placed on simulating the response from a two-dimensional interface. The analytical development of the(More)
It is shown that the nuclear effects playing a relevant role in Deep Inelastic Scattering of polarized electrons by polarized 3He are mainly those arising from the effective proton and neutron polarizations generated by the S′ and D waves in 3He. A simple and reliable equation relating the neutron, g 1 , and 3He, g3 1 , spin structure functions is proposed.(More)
This study examined the relationship between children's emotional and behavioral problems and teachers' social responding. Elementary school students completed the Children's Depression Inventory and a parent completed the Child Behavior Checklist. Teachers rated children on measures of interpersonal attractiveness and personal rejection. Teachers' ratings(More)