نتایج جستجو برای: angstrom
تعداد نتایج: 1421 فیلتر نتایج به سال:
[1] Using a CIMEL Sun photometer, we conducted continuous observations over the urban area of Shanghai (31 14′N, 121 32′E) from 18 April 2007 to 31 January 2009. The aerosol optical depth (AOD), Angstrom wavelength exponent, single scattering albedo (w0), and aerosol particle size distribution were derived from the observational data. The monthly mean AOD reached a maximum value of 1.20 in June...
Nitric oxide is a pollutant linked to the production of smog and acid rain in the environment. Due to the increase in production of nitric oxide, scientists have attempted to increase methods to detect the pollutant at low and high concentrations. Scientists have investigated gas sensors because of their low cost, sensitivity to gases at low concentrations, and fast response time. WO3 gas sensi...
FREDRIK K. FATEMI,* JONATHAN E. HOFFMAN, PABLO SOLANO, ELIOT F. FENTON, GUY BEADIE, STEVEN L. ROLSTON, AND LUIS A. OROZCO Army Research Laboratory, Adelphi, Maryland 20783, USA Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA Naval Research Laboratory, Washington, DC 20375, USA *Correspon...
Backscatter SEM imaging and small-angle neutron scattering (SANS) data are combined within a statistical framework to quantify the microstructure of a porous solid in terms of a continuous pore-size distribution spanning over five orders of magnitude of length scale, from 10 A to 500 microm. The method is demonstrated on a sample of natural sandstone and the results are tested against mercury p...
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