Characterization of aluminum/RP-1 gel propellant properties

Research efforts are being conducted by the NASA Lewis Research Center to formulate and characterize the properties of Al/RP-1 and RP-1 gelled propellants for rocket propulsion systems. Twenty four different compositions of gelled fuels were formulated with 5 and 16 micron, atomized aluminum powder in RP-1. The total solids concentration in the propellant varied from 5 to 60 wt percent. Tests were conducted to evaluate the stability and rheological characteristics of the fuels. Physical separation of the solids occurred in fuels with less than 50 wt percent solids concentration. The rheological characteristics of the Al/RP-1 fuels varied with solids concentration. Both thixotropic and rheopectic gel behavior were observed. The unmetallized RP-1 gels, which were formulated by a different technique than the Al/RP-1 gels, were highly viscoelastic. A history of research efforts which were conducted to formulate and characterize the properties of metallized propellants for various applications is also given

An Implied Private Right of Action under Section 16(a) of the Securities Exchange Act of 1934

Judicial implication of private rights of action from federal securities legislation has been hailed as a major step toward meaningful regulation of securities practices and market stability. This Note examines a recent extension of implied liability under a provision not previously considered supportive of such a right. After attempting to develop a workable rationale for the private right, the author concludes that the extension cannot be supported and that the court should have taken heed of the cautiousness exhibited by other courts and refused to extend implied liability to situations not clearly within the intended protective scheme of the legislation

Calibration of weirs by means of critical flow and specific energy

For many years man has been relying more each day upon metering devices to measure the flow of fluids in industry. The orifice, orifice meter, venturi meter, pitot tube, nozzle, flume and the weir have been employed, each having its own particular advantage. In this parade of metering progress, the contracted weir has long been the forgotten brother of the suppressed weir. In almost every textbook on hydraulics or fluid mechanics, the following words appear, end contractions are to be avoided where the weir cannot be calibrated . This skepticism and the length or absurdity of some contracted weir formulas led to the development of this study --Introduction, page 1

An Implied Private Right of Action under Section 16(a) of the Securities Exchange Act of 1934

Judicial implication of private rights of action from federal securities legislation has been hailed as a major step toward meaningful regulation of securities practices and market stability. This Note examines a recent extension of implied liability under a provision not previously considered supportive of such a right. After attempting to develop a workable rationale for the private right, the author concludes that the extension cannot be supported and that the court should have taken heed of the cautiousness exhibited by other courts and refused to extend implied liability to situations not clearly within the intended protective scheme of the legislation

Expanded Liability under Section 12 of the Securities Act: When Is a Seller not a Seller?

The language of section 12 of the Securities Act of 1933 limits the scope of potential defendants thereunder to those people who offer or sell a security. The courts have consistently expanded the class of eligible section 12 defendants to include people who do not fit the traditional notion of a seller. The author traces that judicial expansion and suggests that the most recent cases may be developing a more realistic, though still imperfect, approach to section 12 liability