A continuously monitored system is considered, that gradually and stochastically deteriorates according to a bivariate non decreasing Lévy process. The system is considered as failed as soon as its bivariate deterioration level enters a failure zone, assumed to be an upper set. A preventive maintenance policy is proposed, which involves a delayed replacement, triggered by the reaching of some p...

A high-resolution relative earthquake location procedure is used to image the fine-scale seismicity structure of the northern Hayward fault, California. The seismicity defines a narrow, near-vertical fault zone containing horizontal alignments of hypocenters extending along the fault zone. The lineations persist over the 15-year observation interval, implying the localization of conditions on t...

As popular aluminum alloys, the 5xxx Al-Mg series, such as 5050 and 5052, etc., are widely used in applications such as automobile, pressure vessels, armor plate, and components for marine and cryogenic service. In this, as in all non-heat-treatable aluminum alloys, the weld metal zone is considered to be the weakest part of the joint and is the location of failure when the joint is loaded in t...

An elastic finite element analysis was conducted to evaluate the stress distribution in the initiation zone of the adhesive rupture during the 3-point bending test. This test is used to measure the adherence between a polyepoxy adhesive and aluminum alloy with different surface treatments. The purpose is to compare, in the high stress concentration areas, the stress fields calculated using fini...

Most investigations on soccer match intensity have evaluated friendly, simulated or a small number of games on a recreational basis or including a small number of players. There are no studies investigating real competitive situations including a considerable number of athletes and games or differences among player positions using heart rate as an intensity parameter. The aim of this study was ...

In spite of healthy demand for a renaissance in economic policy for agricultural development, the academic supply response is found wanting. The infusion of public economics into the economics of agricultural development, which thrived during the 1970s and 80s, has stagnated due to the lack of foundations in transaction costs, dynamics, and the co-evolution of specialization and governance. Man...

RC flat slabs supported by an array of columns subjected to the action impulsive pressure were investigated. The designed for static loads according current standards. dynamic responses 4 × 4- and 8 8-column-supported similar, as damage failure. A simplified model consisting a tributary area central column yielded similar results, demonstrating accuracy its reliability. These analyses exhibited...

– further our understanding of the hydrodynamical interactions between polar oceans and sea ice, especially with regard to the marginal ice zone (MIZ), i.e. the typically 10–100 km wide m ́elange of ice floes that connects open sea to the interior pack ice; – model the attenuation and spreading of directional seas within and in the waters adjoining MIZs, using a conservative, multiple wave scatt...