We show that electronic correlations decimate the intrinsic ferroelectric polarization of multiferroic manganites RMn2O5, where R is a rare earth element. Such is manifest from ab initio band structure computations that account for the Coulomb interactions between the manganese 3d electrons--the root of magnetism in RMn2O5. Including these leads to an amplitude and direction of polarization of ...

Heavy metals were determined in the soft tissue and shells of the littorinid, Littoraria scabra, and in the sediments of four mangrove areas along the Dar es Salaam coastline where L. scabra was collected. Several metals accumulate, preferentially in the animals' soft body parts, but do not seem to affect the shell morphology of this species. Sediment-metal levels, measured in the direct vicini...

Spaceflight instrument mass and size have a large impact on mission planning. NASA has been investing in a new generation of Earth-observing instruments through the Instrument Incubator Program. Several instruments and their improvements are described. A companion paper examines the mission planning implications.

SINCE ancient times, human beings have always pondered philosophical questions relating to living organisms, the planet Earth and the universe itself. What is life? Are human beings special living organisms? What is that twinkling star in the night sky? What is the universe? How big is the universe and where does it begin and end? These are just a few questions. However, these questions can har...

Experimental and theoretical memory diffusion of water in sand G. Iaffaldano, M. Caputo, and S. Martino Department of Physics, University “La Sapienza”, Rome, Italy Department of Geology and Geophysics, Texas A&M University, College Station, Texas, USA Department of Earth Sciences, University “La Sapienza”, Rome, Italy Now at Geophysics Section, Ludwig-Maximilians University, Munich, Germany Re...

1: Division of Earth and Ocean Sciences, Nicholas School for the Environment and Earth Sciences, Duke University, Durham, NC, USA 2. Climate Dynamics Group, Atmospheric, Oceanic and Planetary Physics Department of Physics, University of Oxford, UK 3. Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan. 4. Lamont-Doherty Earth Observatory, Columbia University, Palisade...

a Woods Hole Oceanographic Institution and Earth Sciences Department, University of California at Santa Cruz, United States b Pacific Geoscience Center, Geological Survey of Canada, Sydney, B.C., Canada, V8L 4B2 c Earth Sciences Department, University of California at Santa Cruz, United States d Earth and Environmental Sciences, University of Illinois at Chicago, United States e Department of G...

1 , B. J. Kellett 2 , B..J. Maddison 2 , P. Sreekumar 3 , J Huovelin4, C.J. Howe 2 , I. A. Crawford 5 , S Narendranath 3 , and the C1XS Team 6 . 1 Institute of Mathematical and Physical Sciences, University of Wales, Aberystwyth, SY23 3BZ, UK. 2 Rutherford Appleton Laboratory, Chilton, UK, 3 Space Astronomy & Instrumentation Division, ISRO Satellite Centre, Bangalore, India, 4The Observatory, U...

M. Hagens, C. P. Slomp, F. J. R. Meysman, D. Seitaj, J. Harlay, A. V. Borges, and J. J. Middelburg Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Utrecht, the Netherlands Department of Ecosystem Studies, Royal Netherlands Institute for Sea Research, Yerseke, the Netherlands Department of Analytical, Environmental and Geochemistry, Faculty of Science, Vrije Universitei...

G. S. Collins, N. Artemieva, K. Wünnemann, P. A. Bland, W. U. Reimold, and C. Koeberl Impacts and Astromaterials Research Centre, Department of Earth Science and Engineering, Imperial College London, SW7 2AZ London, UK; Institute for the Dynamics of Geospheres, Russian Academy of Sciences, Moscow, Russia; Museum for Natural History, Humboldt University, Invalidenstrasse 43, 10115 Berlin, German...