Sustainability in the Upper Colorado River Basin: A Struggle Between Water Resource Use and Remnants of the Natural Ecosystem

This study evaluated whether development of the Colorado River system has exceeded sustainability by comparing the trends in water use in the Colorado River. Two sustainable areas were identified in the upper basin and one in the lower-- the mainstream Colorado River, Green and Yampa rivers, and the Little Colorado River. These areas are also high priority recovery areas for four endangered fishes and protected by critical habitat provisions of the ESA. Unfortunately, the endangered fishes are declining because of habitat destruction and non-native species. If increasing water demand causes the fishes to go extinct the few sustainable areas will be lost. It will take careful management of the endangered fishes and water users to ensure these areas are maintained.

Revenue act of 1932--Supplement no.4. Statement of Secretary of Treasury. : Hearings before the Committee on Finance, United States Senate, seventy-second Congress, first session on H.R. 10236 an act to provide revenue, equalize taxation and for other purposes, May 31, 1932.

Mode of access: Internet.

Habits and men, with remnants of record touching the makers of both /

Mode of access: Internet.

Calendar of treasury books, 1660/67- preserved in the Public Record Office.

Publisher varies.

Calendar of Treasury books, preserved in the Public record office. Introduction to vols. XI-XVII covering the years 1695-1702.

Mode of access: Internet.

Calendar of treasury books, ... preserved in the Public Record Office /

Mode of access: Internet.

Issuance of Treasury bills. Hearings, Seventy-first Congress, first session, on H.R. 1648. May 29, 1929.

Mode of access: Internet.

Calendar of treasury books. preserved in the Public record office /

v. 32. Jan.-Dec. 1718. Pt. 1, Introd., accounts, etc. pt.2. Treasury minutes, warrants, etc., with index.

Revenue act of 1932 ... Supplement no. 4, statement of Secretary of Treasury : hearings before the Committee on Finance, United States Senate, seventy-second Congress, first session, April 6-21, 1932.

Mode of access: Internet.

Principal component and second generation wavelet analysis of Treasury yield curve evolution

Prices of U.S. Treasury securities vary over time and across maturities. When the market in Treasurys is sufficiently complete and frictionless, these prices may be modeled by a function time and maturity. A cross-section of this function for time held fixed is called the yield curve; the aggregate of these sections is the evolution of the yield curve. This dissertation studies aspects of this evolution. ^ There are two complementary approaches to the study of yield curve evolution here. The first is principal components analysis; the second is wavelet analysis. In both approaches both the time and maturity variables are discretized. In principal components analysis the vectors of yield curve shifts are viewed as observations of a multivariate normal distribution. The resulting covariance matrix is diagonalized; the resulting eigenvalues and eigenvectors (the principal components) are used to draw inferences about the yield curve evolution. ^ In wavelet analysis, the vectors of shifts are resolved into hierarchies of localized fundamental shifts (wavelets) that leave specified global properties invariant (average change and duration change). The hierarchies relate to the degree of localization with movements restricted to a single maturity at the base and general movements at the apex. Second generation wavelet techniques allow better adaptation of the model to economic observables. Statistically, the wavelet approach is inherently nonparametric while the wavelets themselves are better adapted to describing a complete market. ^ Principal components analysis provides information on the dimension of the yield curve process. While there is no clear demarkation between operative factors and noise, the top six principal components pick up 99% of total interest rate variation 95% of the time. An economically justified basis of this process is hard to find; for example a simple linear model will not suffice for the first principal component and the shape of this component is nonstationary. ^ Wavelet analysis works more directly with yield curve observations than principal components analysis. In fact the complete process from bond data to multiresolution is presented, including the dedicated Perl programs and the details of the portfolio metrics and specially adapted wavelet construction. The result is more robust statistics which provide balance to the more fragile principal components analysis. ^

Portafolios de inversión : una alternativa para el aprovechamiento de los recursos remanentes de tesorería

El mercado de valores ofrece una variedad de activos con diferentes combinaciones de rendimientos y de riesgos que en la actualidad las empresas utilizan, con el fin de obtener rendimientos o dividendos y contribuir a aumentar el capital de la empresa. Esta operación, si no es realizada de manera correcta puede generar desde la falta de liquidez hasta la pérdida de dinero. Por tal motivo, la creación de portafolios de inversión se convierte en una herramienta fundamental para la toma de decisiones permitiéndole a las empresas que los remanentes de tesorería sean utilizados como inversión y que estos mismos obtengan rendimientos fructíferos y satisfactorios.

Análisis presupuestario del Ayuntamiento de Bilbao 2010-2013

En estos últimos años a raíz de la crisis económica que supuso una gran desaceleración económica, las entidades públicas han sufrido grandes cambios tanto en su situación económica como en la financiera teniendo que ajustar sus presupuestos. Este trabajo se basa en analizar la situación presupuestaria del Ayuntamiento de Bilbao en el periodo 2010-2013 mediante la recogida de datos económicos y analizando los presupuestos de gastos y de ingresos de dicha entidad. Para ello, se van a recoger los componentes del presupuesto: como se ha financiado (Clasificación Económica del Ingreso), la estrategia de actuación (Ejes Estratégicos), en que se ha utilizado el gasto (Clasificación Económica del Gasto) y para que se ha llevado a cabo (Clasificación Funcional del Gasto) y por ultimo quien ha ejecutado el gasto (Clasificación Orgánica). Además, se va a analizar la ejecución presupuestaria, el resultado presupuestario, el remanente de tesorería y la ejecución presupuestaria, así como otras variables presupuestarias.

Magnetic discontinuities in the near-earth solar wind: evidence of in-transit turbulence or remnants of coronal structure?

Fluctuations in the solar wind plasma and magnetic field are well described by the sum of two power law distributions. It has been postulated that these distributions are the result of two independent processes: turbulence, which contributes mainly to the smaller fluctuations, and crossing the boundaries of flux tubes of coronal origin, which dominates the larger variations. In this study we explore the correspondence between changes in the magnetic field with changes in other solar wind properties. Changes in density and temperature may result from either turbulence or coronal structures, whereas changes in composition, such as the alpha-to-proton ratio are unlikely to arise from in-transit effects. Observations spanning the entire ACE dataset are compared with a null hypothesis of no correlation between magnetic field discontinuities and changes in other solar wind parameters. Evidence for coronal structuring is weaker than for in-transit turbulence, with only ∼ 25% of large magnetic field discontinuities associated with a significant change in the alpha-to-proton ratio, compared to ∼ 40% for significant density and temperature changes. However, note that a lack of detectable alpha-to-proton signature is not sufficient to discount a structure as having a solar origin.

Feeding ecology of carnivores (Mammalia, Carnivora) in Atlantic Forest remnants, Southern Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)