The plastic collapse and energy absorption capacity of egg-box panels

The plastic collapse response of aluminium egg-box panels subjected to out-of-plane compression has been measured and modelled. It is observed that the collapse strength and energy absorption are sensitive to the level of in-plane constraint, with collapse dictated either by plastic buckling or by a travelling plastic knuckle mechanism. Drop weight tests have been performed at speeds of up to 6 m s-1, and an elevation in strength with impact velocity is noted. A 3D finite element shell model is needed in order to reproduce the observed behaviours. Additional calculations using an axisymmetric finite element model give the correct collapse modes but are less accurate than the more sophisticated 3D model. The finite element simulations suggest that the observed velocity dependence of strength is primarily due to strain-rate sensitivity of the aluminium sheet, with material inertia playing a negligible role. Finally, it is shown that the energy absorption capacity of the egg-box material is comparable to that of metallic foams. © 2003 Elsevier Ltd. All rights reserved.

Sapientia, 1970, Vol. XXV, nº 97 (número completo)

Contenido: El hecho y la norma / Octavio N. Derisi – El Nuevo Mundo en la filosofía de la historia de Vico / Alberto Caturelli – Los comentarios de Santo Tomás y de Roberto Grosseteste a la “Física” de Aristóteles / Celina A. Lértora Mendoza – Descartes : cuestiones gnoseológicas / Augusto Furlán – Notas y comentarios -- Bibliografía

Modelling of Laminar Plasma Jet Impinging on a Flatplate with Approximate Box Relaxation Method

Approximate Box Relaxation method was used t'o simulate a plasma jet flow impinging on a flatplate at atmospheric pressure, to achieve a better understanding of the characteristics of plasma jet in materials surface treating. The flow fields under different conditions were simulated and analyzed. The distributions of temperature, velocity and pressure were obtained by modelling. Computed results indicate that this numerical method is suitable for simulation of the flow characteristics of plasma jet: and is helpful for understanding of the mechanism of the plasma-material processing.

Sapientia, 1970, Vol. XXV, nº 96 (número completo)

Contenido: La declinación del espíritu y de la cultura / Octavio N. Derisi – Escalas y sistemas de la naturaleza / Olsen A. Ghirardi – La inversión de la perspectiva filosófica y sus consecuencias / Michele F. Sciacca – Positivismo y dialéctica / Norbert Lechner – Notas y comentarios -- Bibliografía

Teología, 1970, Tomo VIII nº 018 (número completo)

Presentación de la Primera Semana Argentina de Teología / Estanislao Karlic -- Estudio sociológico sobre la imagen de Dios en el hombre medio de Córdoba / Eva Chamorro Greca -- Las vías de la creencia en Dios / Domingo Basso -- Crónica de la Facultad

Sapientia, 1970, Vol. XXV, nº 95 (número completo)

Contenido: Materia y necesidad, espíritu y libertad / Octavio N. Derisi – Sistema y silencio en el “Tractatus” de Ludwig Wittgenstein / Alberto Moreno – Los nombres del ser / Gustavo E. Ponferrada – Una perspectiva iusfilosófica del valor justicia en el derecho constitucional / Germán J. Bidart Campos – Notas y comentarios -- Bibliografía

Teología, 1970, Tomo VIII nº 017 (número completo)

Presentación / Dirección -- Teología de la liberación / Eduardo Pironio -- Figura teológico espiritual del obispo / Eduardo Pironio -- Reflexión teológica sobre el sacerdote / Eduardo Pironio -- “Poner la otra mejilla”, estudio sobre la redacción de Mt. 5 39-41 y Lc. 6 29-30 / Luis H. Rivas -- Convocatoria / Semana Nacional de Teología -- Cartas sobre los estatutos / Sagrada Congregación para la Educación -- Notas bibliográficas -- Libros recibidos

The Black Box of Mutual Fund Fees

This paper re-examines the determinants of mutual fund fees paid by mutual fund shareholders for management costs and other expenses. There are two novelties with respect to previous studies. First, each type of fee is explained separately. Second, the paper employs a new dataset consisting of Spanish mutual funds, making it the second paper to study mutual fund fees outside the US market. Furthermore, the Spanish market has three interesting characteristics: (i) both distribution and management are highly dominated by banks and savings banks, which points towards potential conflicts of interest; (ii) Spanish mutual fund law imposes caps on all types of fees; and (iii) Spain ranks first in terms of average mutual fund fees among similar countries. We find significant differences in mutual fund fees not explained by the fund’s investment objective. For instance, management companies owned by banks and savings banks charge higher management fees and redemption fees to nonguaranteed funds. Also, investors in older non-guaranteed funds and non-guaranteed funds with a lower average investment are more likely to end up paying higher management fees. Moreover, there is clear evidence that some mutual funds enjoy better conditions from custodial institutions than others. In contrast to evidence from the US market, larger funds are not associated with lower fees, but with higher custody fees for guaranteed funds and higher redemption fees for both types of funds. Finally, fee-setting by mutual funds is not related to fund before-fee performance.

Dados estatísticos : eleições federais, estaduais realizadas no Brasil em 1970

Apresenta dados estatísticos sobre o resultado do pleito realizado em 1970. O texto se divide em 2 partes: a primeira se refere aos pleitos para escolha de Senadores, Deputados Federais e Estaduais, e a segunda contém os quadros comparativos dos pleitos de 1945 a 1970.

Hydrographic observations in Elkhorn Slough and Moss Landing Harbor, California, October 1970 to November 1971. Annual report, Part 3, July 1972

In October 1970, Moss Landing Marine Laboratories began an observational program to determine/the seasonal changes in the water chemistry of Elkhorn Slough and Moss Landing Harbor. This data report contains the first year of data (October 1970 - November 1971). These data are of immediate interest in determining the flushing and mixing mechanisms of the slough and in establishing the effect that local domestic and industrial effluents have on the distribution of these chemical parameters. (Document contains 78 Pages)

Public water supplies of selected municipalities in Florida, 1970

This report summarizes municipal use of water in 138 selected municipalities in Florida as of December 1970 and includes the following: 1) Tabulation of data on water-use for each listed municipality; 2) tabulation of chemical analyses of water for each listed municipality; and 3) graphs of pumpage, included when available. Also included are selected recent references relating to geology, hydrology, and water resources of those areas in which the municipalities are located. (218 page document)