Evaluation of Fly Ash in lean Portland Cement Concrete Base "Econocrete", August 1986

Fly ash was used in this evaluation study to replace 30, 50 and 70 percent of the 400 1bs. of cement currently used in each cu. yd. of portland cement econocrete base paving mix. Two Class "c" ashes and one Class "F" ash from Iowa approved sources were examined in each mix. When Class "c" ashes were used, they were substituted on the basis of 1.0 pound for each pound of cement removed. When Class "F" ash was used, it was substituted on the basis of 1.25 pounds of ash for each pound of cement removed. Compressive strengths with and without fly ash were determined at 7, 28 and 56 days of age. In most cases, strengths were adequate. The freeze/thaw durability of the econocrete mixes studied was not adversely affected by the presence of fly ash. The tests along with erodibility and absorption tests have demonstrated the feasibility of producing econocrete with satisfactory mechanical properties even when relatively low quality and/or locally available aggregate is being used at no sacrifice to strength and/or durability.

La pratique basée sur les résultats probants. Partie 2: Les étapes du processus [Evidence-based practice: Part 2: Steps in the process].

Evidence-based (EBP) aims for a new distribution of power centered on scientific evidence rather than clinical expertise. The present article describes the operational process of EBP by describing the implementation stages of this type of practise. This stage presentation is essential given that there are many conceptions end models of EBP and that some nurses have a limited knowledge of its rules ans implications. Given that number and formulation of the stages varies by author, the process presented here attempts to integrate the different stages reviewed.

[Voyage en Italie : 1825-1830]. , Au Musée de Florence : [motif ornemental à base de feuilles d'acanthe] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 160

[Voyage en Italie : 1824-1830]. , Du portique près le Forum triangulaire au huitième de l'Exécution : [élévation d'une partie de l'entablement avec le sommet d'une colonne et son chapiteau dorique, coupe sur l'entablement seul, élévation de la base de la colonne] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 386

[Voyage en Italie : 1824-1830]. , Du portique près le Forum triangulaire au huitième de l'Exécution : [élévation d'une partie de l'entablement avec le sommet d'une colonne et son chapiteau ionique, coupe du même ensemble, élévation de la base de la colonne] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 387

[Voyage en Italie : 1824-1830]. , Temple de Junon Matuta à Rome. Détails au huitième de l'Exec[uti]on : [élévation partielle d'une colonne (base et chapiteau), d'un entablement et d'une corniche, plusieurs profils] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 596

[Voyage en Italie : 1824-1830]. , Temple de la Piété à Rome. Détails au huitième de l'Exécution : [profil, élévation partielle d'une colonne (base et chapiteau), d'un entablement et d'une corniche] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, n. d.

[Voyage en Italie : 1824-1830]. , Tombeau de Bibulus à Rome. Détails au quart de l'exéc[u]tion : [détail d'élévation de la frise, avec entablement et chapiteau, détail d'élévation de la base d'une colonne, deux profils] : [dessin] / h. L. [Henri Labrouste]

Référence bibliographique : Weigert, 606

Una nova eina per a l’estudi del paper i les filigranes. Anàlisi i desenvolupament d’una base de dades per a l’estudi del paper i de les filigranes: font per a l’elaboració de la història del paper a Espanya

L’aspiració de trobar una eina que pugui ajudar a identifi car els papers atenent les sevescaracterístiques sorgeix a fi nal segle XVIII amb les primeres descripcions de les filigranespapereres i va prenent cos al segle XIX com a ciència auxiliar de la codicologia.Des de les últimes dècades del segle XX, les filigranes han anat adquirint un interès creixententre els restauradors de document gràfi c —com una eina més per a la presa de decisions i pera la valoració del procés de restauració— i entre els documentalistes, historiadors, museòlegsi bibliòfils —per a la datació i autenticació de les obres— i, fins i tot, en investigacionspolicials i jurídiques per aclarir algun fet delictiu. No obstant això, durant aquests 150 anys, l’estudi del paper a través de les filigranes papereres a Espanya no ha experimentat cap avenç significatiu pel que fa als mètodes i procediments seguits per a l’obtenció i gestió deles dades. En l’àmbit europeu, encara que a partir dels anys 90 sorgeixen noves propostesd’estudi, aquestes limiten la investigació a l’anàlisi de la filigrana sense assolir una visió global del plec sortit de la forma.

La base de dades i servei de sumaris a la Biblioteca de la Universitat de Barcelona

Es presenta el servei de sumaris de la Biblioteca de la Universitat de Barcelona. Els usuaris del servei poden consultar, a través de la web de la biblioteca, els sumaris de les revistes subscrites i rebre els que desitgin per correu electrònic. El servei permet racionalitzar la inversió en subscripcions i mantenir l¿usuari puntualment informat.

FUTURA: uma base de dados sobre a biblioteca do futuro

Base de dados que objetiva disponibilizar, em único local de fácil e rápido acesso, informações básicas essenciais aos interessados na biblioteca do futuro, seja ela eletrônica, virtual, digital, sem paredes ou biônica. Desenvolvida com o software MicroIsis, encontra-se disponível na Internet a todo e qualquer interessado por intermédio do servidor de bases de dados ISIS para o WWW (software intitulado WWWIsis, desenvolvido pela Bireme). A recuperação da informação é possível por índice de termos indexados ou formulário de pesquisa utilizando-se lógica booleana em campos de autoria, título, assunto, data e língua. Delimitações de pesquisa por tipo de documento e conteúdo de informação também são oferecidas. URL: http://www.eca.usp.br/eca/nucleos/biblial/futura/index.htm

A base de dados ISI e seu processo de seleção de revistas

Descreve o processo de seleção de revistas científicas adotado pelo Institute for Scientific Information (ISI) para incorporar publicações em sua base de dados, abordando critérios como periodicidade, conteúdo editorial, internacionalidade e análise de citação.

"El Barranc de Gàfols" (Ginestar, Tarragona) y "Aldovesta" (Benifallet, Tarragona): estudio arqueozoológico como base de teorización sobre la dieta humana a principios de la Edad del Hierro y la complejidad económica en el curso bajo del Ebro.

En relación a trabajos recientes sobre los patrones de poblamiento protohistórico en el curso bajo del Ebro y la causalidad económica (Asensio el alii, 1996/ Mascort el alii, 1991), decidimos plantear un estudio que nutriera dichas hipótesis mediante el análisis arqueozoológico de dos yacimientos culturalmente contemporáneos y de cronologías sucesivas, ubicados a orillas de este río.

Mass movement characterization using a reflexion and refraction seismic survey with the sloping local base level concept

This study proposes a new concept for upscaling local information on failure surfaces derived from geophysical data, in order to develop the spatial information and quickly estimate the magnitude and intensity of a landslide. A new vision of seismic interpretation on landslides is also demonstrated by taking into account basic geomorphic information with a numeric method based on the Sloping Local Base Level (SLBL). The SLBL is a generalization of the base level defined in geomorphology applied to landslides, and allows the calculation of the potential geometry of the landslide failure surface. This approach was applied to a large scale landslide formed mainly in gypsum and situated in a former glacial valley along the Rhone within the Western European Alps. Previous studies identified the existence of two sliding surfaces that may continue below the level of the valley. In this study. seismic refraction-reflexion surveys were carried out to verify the existence of these failure surfaces. The analysis of the seismic data provides a four-layer model where three velocity layers (<1000 ms(-1), 1500 ms(-1) and 3000 ms(-1)) are interpreted as the mobilized mass at different weathering levels and compaction. The highest velocity layer (>4000 ms(-1)) with a maximum depth of similar to 58 m is interpreted as the stable anhydrite bedrock. Two failure surfaces were interpreted from the seismic surveys: an upper failure and a much deeper one (respectively 25 and 50 m deep). The upper failure surface depth deduced from geophysics is slightly different from the results obtained using the SLBL, and the deeper failure surface depth calculated with the SLBL method is underestimated in comparison with the geophysical interpretations. Optimal results were therefore obtained by including the seismic data in the SLBL calculations according to the geomorphic limits of the landslide (maximal volume of mobilized mass = 7.5 x 10(6) m(3)).