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You searched on: Author: joseph conny Sorted by: date

Displaying records 1 to 10 of 19 records.
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1. Filter Material Effects on Particle Absorption Characteristics
Published: 2/10/2014
Authors: Cary Presser, Joseph M Conny, Ashot Nazarian
Abstract: The absorption coefficient and mass specific absorption cross section were determined for nigrosin-laden quartz, Teflon, and polycarbonate filters in inert surroundings at different steady-state temperatures and particle mass loadings. The objective ...

2. Measurement of the Optical Extinction Coefficient of Combustion-Generated Aerosol
Published: 2/1/2005
Authors: J F. Widmann, J x Duchez, Joseph M Conny, George William Mulholland
Abstract: This note describes mesurements of the optical extinction coefficient of carbonaceous aerosol produced during hydrocarbon combustion. Measurements of the mass specific extinction coefficient were obtained by laser extinction at 632 nm wavelength. T ...

3. Optimizing Thermal-Optical Methods for Measuring Atmospheric Elemental (Black) Carbon: A Response Surface Study
Published: 9/1/2003
Authors: Joseph M Conny, D Klinedinst, Scott A Wight, J L Paulsen
Abstract: The chemical, physical, and morphological complexity of atmospheric aerosol black carbon (BC) presents major problems in measurement accuracy. Methods based on thermal-optical analysis (TOA) are widely used for ambient air samples because no prior kn ...

4. Soot Inception in a Well Stirred Reactor
Published: 3/19/2003
Authors: L G. Blevins, K A Jensen, R A Ristau, N Y Yang, C W Frayne, R C Striebich, M J DeWitt, S D Stouffer, E J Lee, Robert A Fletcher, J M Oran, Joseph M Conny, George William Mulholland
Abstract: Soot samples collected from a well stirred reactor operating with ethylene/air equivalence ratios of 1.9, 2.0, and 2.1 were examined to determine yield, size distribution, morphology, and composition. For F = 1.9, particles are absent. For F = 2.0 ...

5. Analysis of Kaolinite/Chrysotile Mixtures by Ashing and X-Ray Diffraction
Published: 9/1/2002
Authors: Jennifer R Verkouteren, Eric S Windsor, Joseph M Conny, R L Perkins, J T Ennis
Abstract: A simple ashing procedure is described that converts kaolinite to amorphous metakaolinite while retaining the diffraction intensity of chrysotile. This ashing procedure removes the XRD pattern overlap between kaolinite and chrysotile that can interf ...

6. Black Carbon and Organic Carbon in Aerosol Particles From Crown Fires in the Canadian Boreal Forest
Published: 6/1/2002
Authors: Joseph M Conny, J F. Slater
Abstract: In the boreal forest, high-intensity crown fires account for an overwhelming proportion of the area burned yearly. Quantifying the amount of black carbon (BC) from boreal crown fires in Canada is essential for assessing the effect on regional climat ...

7. NIST Data Resources for Surface Analysis by X-Ray Photoelectron Spectroscopy and Auger Electron Spectroscopy
Published: 3/1/2001
Authors: Cedric John Powell, Aleksander Jablonski, A Naumkin, A Kraut-Vass, Joseph M Conny, J R. Rumble
Abstract: A description is given of data resources that are available from the National Institute of Standards and Technology (NIST) for x-ray photoelectron spectroscopy (XPS) and Auger-electron spectroscopy. NIST currently has three databases available: an ...

8. Some Issues in Quantitative X-Ray Photoelectron Spectroscopy and Auger-Electron Spectroscopy
Published: 3/1/2001
Authors: Cedric John Powell, Joseph M Conny, Aleksander Jablonski
Abstract: We give an overview of two issues that are important in quantitative X-ray photoelectron spectroscopy (XPS) and Auger-electron spectroscopy (AES). First, we review the use of XPS standard test data (STD) that consists mainly of synthesized doublets. ...

9. Standard Test Data for Estimating Peak Parameter Errors in X-Ray Photoelectron Spectroscopy III. Errors With Different Curve-Fitting Approaches
Published: 12/1/2000
Authors: Joseph M Conny, Cedric John Powell
Abstract: We present results in the final part of a three-part of a three-part study employing standard test data (STD) to estimate errors in peak parameters derived from data analysis procedures used in x-ray photoelectron spectroscopy (XPS). XPS-STD are sim ...

10. Standard Test Data for Estimating Peak Parameter Errors in X-Ray Photoelectron Spectroscopy: II. Peak Intensities
Published: 7/1/2000
Authors: Joseph M Conny, Cedric John Powell
Abstract: Standard test data for x-ray photoelectron spectroscopy (XPS-STD) have been developed for determining bias and random error in peak parameters derived from curve fitting in XPS. The XPS-STD are simulated C 1s spectra from spline polynomial models of ...

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