Now showing items 1-10 of 100
The S-wave from the decay
Texture and structural refinement using neutron diffraction data from molybdite (MoO3) and calcite (CaCO3) powders and a Ni-rich Ni50.7Ti49.30 alloy
(Cambridge University Press, 2009-12)
Preferred orientation or texture is a common feature of experimental powder patterns. The mathematics of two commonly used models for preferred orientation-the March-Dollase and the generalized spherical-harmonic models-is ...
Spatial variation in soil active-layer geochemistry across hydrologic margins in polar desert ecosystems
(Copernicus Publications, 2009)
Polar deserts are characterized by severe spatial-temporal limitations of liquid water. In soil active layers of the Antarctic Dry Valleys, liquid water is infrequently available over most of the arid terrestrial landscape. ...
Mass Outflow in the Seyfert 1 Galaxy NGC 5548
(IOP PUBLISHING LTD, 2009-06)
We present a study of the intrinsic UV absorption and emission lines in an historically low-state spectrum of the Seyfert 1 galaxy NGC 5548, which we obtained in 2004 February at high spatial and spectral resolution with ...
Quasar Outflow Contribution to AGN Feedback: Observations of QSO SDSS J0838+2955
(IOP PUBLISHING LTD, 2009-11)
We present a detailed analysis of the Astrophysical Research Consortium 3.5 m telescope spectrum of QSO SDSS J0838+2955. The object shows three broad absorption line (BAL) systems at 22,000, 13,000, and 4900 km s(-1) ...
Cell cycle regulation by feed-forward loops coupling transcription and phosphorylation
(Nature Publishing Group, 2009-01-01)
Quantum Nonequilibrium Steady States Induced by Repeated Interactions
(American Physical Society, 2009-05-22)
We study the steady state of a finite XX chain coupled at its boundaries to quantum reservoirs made of free spins that interact one after the other with the chain. The two-point correlations are calculated exactly, and it ...
Temporal Controls of the Asymmetric Cell Division Cycle in Caulobacter crescentus
The asymmetric cell division cycle of Caulobacter crescentus is orchestrated by an elaborate gene-protein regulatory network, centered on three major control proteins, DnaA, GcrA and CtrA. The regulatory network is cast ...
Variation in ecosystem function in appalachian streams along an acidity gradient
(Ecological Society of America, 2009-07)
Acidification is a widespread phenomenon that damages aquatic systems, and it has been the focus of intensive management efforts. While most management has focused on community structure as an endpoint, ecosystem function ...
Maintenance of terrestrial nutrient loss signatures during in-stream transport
(Ecological Society of America, 2009-02)
Small streams account for the majority of channel length in river basins worldwide and are the primary conveyors of terrestrial nutrients to rivers and ultimately the oceans. The controls of stream nutrient fluxes, however, ...