Surface litter from a natural and a sewage-enriched cypress dome in north-central Florida showed a pronounced seasonal pattern of nitrogenase (acetylene reduction) activity associated with seasonal leaf fall from deciduous trees in the domes. Samples of peat from cores indicated negligible nitrogenase activity below the surface layer. Integrating the monthly rates of nitrogen fixation (based on...

[1] Seismic tomography reveals two large, low-shear velocity provinces (LLSVPs) beneath Africa and the Pacific Ocean. These structures may have existed for several 100 Myr and are likely compositionally distinct based on observed seismic characteristics interpreted in light of geodynamic models and mineral physics constraints. We investigate the dynamics of the LLSVPs through the use of evoluti...

A detailed study of a 60 x 150 km area at 60øW, 24øN at the eastern end of the Nares Abyssal Plain indicates that hydrothermal circulation is still active in the 80 m.y.B.P. oceanic crust. The 58 heat flow measurements made at five stations in the area have revealed (1) constant heat flow over the abyssal plain (56 mW m-2), (2) a cyclic heat flow over the abyssal hills (mean of 77 mW m-2), and ...

Abstract This paper presents some results of research aimed at defining a parametric tool for modelling complex decorative apparatuses domes based on geometric rules definition and building techniques. MaTiDo , Majolica Tiles Domes, is an adaptive that allows user to place “fish scale” revolution oval or elliptical ones, with ribs without ribs. can be used reproduce the look real virtually reco...

[1] Two classes of natural solid media, glacial ice and salt domes, are under consideration as media in which to deploy instruments for detection of neutrinos with energy 10 eV. Though insensitive to 10 to 10 eV neutrinos for which observatories (e.g., AMANDA and IceCube) that utilize optical Cherenkov radiation detectors are designed, radio and acoustic methods are suited for searches for the ...