Résumé. Les index et les vues matérialisées sont des structures physiques qui accélèrent l’accès aux données d’un entrepôt. Ces structures engendrent cependant une surcharge de maintenance. Par ailleurs, elles partagent le même espace disque. Les travaux existants dans le domaine de la sélection d’index et de vues matérialisées traitent ces deux structures de manière isolée. Dans cet article, n...

This study examined the incidence and determinants of quantity price discounts and quantity price surcharges in the German food sector through a bivariate probit, using recent consumer scanner survey data. Selectivity bias was corrected for in estimating the degree of quantity price surcharge and quantity price discount, using Heckman’s procedure. The findings reveal that almost 10% of the inve...

Résumé. Dans le contexte de la gestion de flux de données, les données entrent dans le système à leur rythme. Des mécanismes de délestage sont à mettre en place pour qu’un tel système puisse faire face aux situations où le débit des données dépasse ses capacités de traitement. Le lien entre réduction de la charge et dégradation de la qualité des résultats doit alors être quantifié. Dans cet art...

We study insolvency cascades in an interbank system when banks are allowed to insure their loans with credit default swaps (CDS) sold by other banks. We show that, by properly shifting financial exposures from one institution to another, a CDS market can be designed to rewire the network of interbank exposures in a way that makes it more resilient to insolvency cascades. A regulator can use inf...

With the proliferation of multimedia group applications, the construction of multicast trees satisfying the quality of service (QoS) requirements is becoming a problem of the prime importance. In this paper, we study the core selection problem that should produce the improved delay-bounded multicast tree in terms of the delay variation that is known to be NP-complete [8]. A solution to this pro...

in this paper, the effect of cyclic loading on punching strength of flat slabs strengthened with carbon fiber reinforced polymer (cfrp) sheets is studied. experimental results of ten slab specimens under monotonic and cyclic loading are analyzed. eight specimens were strengthened with cfrp sheets on the tensile face of the slabs and the two other specimens were kept un-strengthened as control s...

1Member of JSCE, Professor, Dept. of Civil and Environmental Eng., National Institute of Technology, Matsue College (14-4 Nishi-ikuma, Matsue, Shimane 690-8518, Japan) E-mail: [email protected] 2Member of JSCE, Electric Power Development Co., Ltd. (15-1 Ginza 6-chome, Chuo-ku, Tokyo 104-8165, Japan) E-mail: [email protected] 3Honorary Member of JSCE, Professor, Kyushu University (...