A Model for Management Predictions of Territorial Bird Populations

Author Institution: Biomathematics Program, Department of Statistics, North Carolina State UniversityA model was developed to compare alternative management schemes that can be employed to regulate the population level of birds having a territorial or resource limited breeding organization. The alternatives of habitat modification, removal of birds, and sterilization were compared. The model is based on the dynamics of the female segment of the population, but provision is made in the case of sterilization for predicting the effects of treatment cither of females only or of both sexes

Enveloping algebras of Malcev algebras

We first discuss the construction by Perez-Izquierdo and Shestakov of universal nonassociative enveloping algebras of Malcev algebras. We then describe recent results on explicit structure constants for the universal enveloping algebras (both nonassociative and alternative) of the 4-dimensional solvable Malcev algebra and the 5-dimensional nilpotent Malcev algebra. We include a proof (due to Shestakov) that the universal alternative enveloping algebra of the real 7-dimensional simple Malcev algebra is isomorphic to the 8-dimensional division algebra of real octonions. We conclude with some brief remarks on tangent algebras of analytic Bol loops and monoassociative loops. This is a revised and expanded version of the survey talk given by the first author at the Second Mile High Conference on Nonassociative Mathematics at the University of Denver (Denver, Colorado, USA, June 22 to 26, 2009).Comment: 15 page

Catalyst for carbon monoxide oxidation

A catalyst is disclosed for the combination of CO and O2 to form CO2, which includes a platinum group metal (e.g., platinum); a reducable metal oxide having multiple valence states (e.g., SnO2); and a compound which can bind water to its structure (e.g., silica gel). This catalyst is ideally suited for application to high-powered pulsed, CO2 lasers operating in a sealed or closed-cycle condition

Rare-isotope and kinetic studies of Pt/SnO2 catalysts

Closed-cycle pulsed CO2 laser operation requires the use of an efficient CO-O2 recombination catalyst for these dissociation products which otherwise would degrade the laser operation. The catalyst must not only operate at low temperatures but also must operate efficiently for long periods. In the case of the Laser Atmospheric Wind Sounder (LAWS) laser, an operational lifetime of 3 years is required. Additionally, in order to minimize atmospheric absorption and enhance aerosol scatter of laser radiation, the LAWS system will operate at 9.1 micrometers with an oxygen-18 isotope CO2 lasing medium. Consequently, the catalyst must not only operate at low temperatures but must also preserve the isotopic integrity of the rare-isotope composition in the recombination mode. Several years ago an investigation of commercially available and newly synthesized recombination catalysts for use in closed-cycle pulsed common and rare-isotope CO2 lasers was implemented at the NASA Langley Research Center. Since that time, mechanistic efforts utilizing both common and rare oxygen isotopes have been implemented and continue. Rare-isotope studies utilizing commercially available platinum-tin oxide catalyst have demonstrated that the catalyst contributes oxygen-16 to the product carbon dioxide thus rendering it unusable for rare-isotope applications. A technique has been developed for modification of the surface of the common-isotope catalyst to render it usable. Results of kinetic and isotope label studies using plug flow, recycle plug flow, and closed internal recycle plug flow reactor configuration modes are discussed

The Microbial Flora of Acid Mine Water and its Relationship to Formation and Removal of Acid

(print) viii, 124 p. illus. 28 cm.Title Page -- Table of Contents -- List of Tables -- List of Figures -- I: Introduction -- II: The Influence of Acid Water on Aerobic Heterotrophs of A Normal Stream -- III: The Relative Influence of Iron, Sulfate and Hydrogen Ions on the Microflora of A Non-Acid Stream -- IV: Aerobic Heterotrophs Indigenous to pH 2.8 Mine Water -- V: A Microbial Dissimilatory Sulfur Cycle -- VI: Microbial Sulfate Reduction in Acidic Mine Water and Its Potential Utility as A Water Pollution -- VII: General Summary and Conclusions -- VIII: Recommendations -- IX: Publications Resulting from this Research Projec

Catalysts for long-life closed-cycle CO2 lasers

Long-life, closed-cycle operation of pulsed CO2 lasers requires catalytic CO-O2 recombination both to remove O2, which is formed by discharge-induced CO2 decomposition, and to regenerate CO2. Platinum metal on a tin (IV) oxide substrate (Pt/SnO2) has been found to be an effective catalyst for such recombination in the desired temperature range of 25 to 100 C. This paper presents a description of ongoing research at NASA-LaRC on Pt/SnO2 catalyzed CO-O2 recombination. Included are studies with rare-isotope gases since rare-isotope CO2 is desirable as a laser gas for enhanced atmospheric transmission. Results presented include: (1) achievement of 98% to 100% conversion of a stoichiometric mixture of CO and O2 to CO2 for 318 hours (greater than 1 x 10 to the 6th power seconds), continuous, at a catalyst temperature of 60 C, and (2) development of a technique verified in a 30-hour test, to prevent isotopic scrambling when CO-18 and O-18(2) are reacted in the presence of a common-isotope Pt/Sn O-16(2) catalyst

The Ecologic Impact of the Interactions Among Microorganisms and Aquatic Contaminants in Lake Erie Phase III Parts 5, 6, and 7

This study was supported in part by the Office of Water Resources Research. U.S. Department of the Interior, under Project B-025-OHIO(print) 172 p.Part 5: List of Figures -- List of Tables -- Introduction -- Literature Review -- Materials and Methods -- Results -- Discussion -- Summary -- BibliographyPart 6: List of Figures -- List of Tables -- Introduction -- Review of Literature -- Materials and Methods -- Results -- Discussion -- Appendix A -- Appendix B -- BibliographyPart 7: List of Illustrations -- List of Tables -- Introduction -- Review of Literature -- Materials and Methods -- Results -- Discussion -- Summary -- Literature Cite

Pt/SnO2-based CO-oxidation catalysts for long-life closed-cycle CO2 lasers

Noble-metal/tin-oxide based catalysts such as Pt/SnO2 have been shown to be good catalysts for the efficient oxidation of CO at or near room temperature. These catalysts require a reductive pretreatment and traces of hydrogen or water to exhibit their full activity. Addition of Palladium enhances the activity of these catalysts with about 15 to 20 percent Pt, 4 percent Pd, and the balance SnO2 being an optimum composition. Unfortunately, these catalysts presently exhibit significant decay due in part to CO2 retention, probably as a bicarbonate. Research on minimizing the decay in activity of these catalysts is currently in progress. A proposed mechanism of CO oxidation on Pt/SnO2-based catalysts has been developed and is discussed