Apparatus for producing high purity silicon carbide crystals Patent

Device for producing high purity silicon carbide on carbon base by hydrogen reduction of silicon tetrachlorid

Method of coating carbonaceous base to prevent oxidation destruction and coated base Patent

Vapor deposited laminated nitride-silicon coating for corrosion prevention of carbonaceous surface

Polynomial coefficients of thermochemical data for the C-H-O-N system

Thermodynamic data are required input for the finite kinetics and equilibrium computer programs needed for modeling the combustion of hydrocarbons in the fields of energy and pollution research. Least squares determined coefficients of the curve-fitted thermodynamic data for 193 species in the C-H-O-N system are presented in card image form and are of suitable format for use by common computer programs

Computer predictions of photochemical oxidant levels for initial precursor concentrations characteristic of southeastern Virginia

A computer study was performed with a photochemical box model, using a contemporary chemical mechanism and procedure, and a range of initial input pollutant concentrations thought to encompass those characteristic of the Southeastern Virginia region before a photochemical oxidant episode. The model predictions are consistent with the expectation of high summer afternoon ozone levels when initial nonmethane hydrocarbon (NMHC) levels are in the range 0.30-0.40 ppmC and NOx levels are in the range 0.02-0.05 ppm. Calculations made with a Lagrangian model, for one of the previously calculated cases, which had produced intermediate afternoon ozone levels, suggest that urban source additions of NMHC and NOx exacerbate the photochemical oxidant condition

Theoretical study of reactive and nonreactive turbulent coaxial jets

The hydrodynamic properties and the reaction kinetics of axisymmetric coaxial turbulent jets having steady mean quantities are investigated. From the analysis, limited to free turbulent boundary layer mixing of such jets, it is found that the two-equation model of turbulence is adequate for most nonreactive flows. For the reactive flows, where an allowance must be made for second order correlations of concentration fluctuations in the finite rate chemistry for initially inhomogeneous mixture, an equation similar to the concentration fluctuation equation of a related model is suggested. For diffusion limited reactions, the eddy breakup model based on concentration fluctuations is found satisfactory and simple to use. The theoretical results obtained from these various models are compared with some of the available experimental data

Hangings In The Thicket: Vigilantism Was Law In The \u27Dark Corner Of The Confederacy\u27

Awful things may be done by neighbor to neighbor in the pressured midst of civil conflict. In the southern states during the Civil War, citizens were persecuted sometimes because they did not show enough enthusiasm for -- or outright opposed -- the Confederate cause. Self-styled defenders of civil o...

Doomed From Within: Slavery Left The Confederacy Undermanned And Internally Divided

Together with his own inimitable style of expression and fertility of mind, William W. Freehling has combined excellent research with a keen reading of recent works to offer an original theory for the Confederate loss in the Civil War. Author of the highly acclaimed The Road to Disunion and ...