Suchergebnisse

Inventing obsolescence -- Urban obsolescence -- The promise of obsolescence -- Fixing obsolescence -- Reversing obsolescence -- Sustainability and beyond

En 2020, la France a produit 849  097 tonnes de déchets électroménagers. Certains grands groupes s'engagent sur la réparabilité de leurs produits, mobilisant associations et pouvoirs publics. Une collaboration qu'illustre l'atelier-boutique RépareSeb.

Except as a weapon of last resort, nuclear weapons have no legitimate or compelling military role to play in any conceivable US national security challenge. Yet some policymakers still cling to modernised nuclear weapons for specific tasks in ensuring American security. Since at least 1991, US security has depended almost exclusively on increasingly capable conventional weapons, as effective as nuclear weapons for attacking the most difficult targets. Deterrence through conventional weapons is decisively more credible than through existing or prospective nuclear alternatives. The mere possession of unprecedented conventional military superiority is not enough; a truly effective strategy hinges on perceived effectiveness. Along with addressing conventional needs, America must reformulate its position on nuclear weapons to severely diminish their relevance and solidify the longstanding international taboo against their use. (Survival / SWP)

AbstractA stochastic single product convex cost inventory problem is considered in which there is a probability, πj, that the product will become obsolete in the future period j. In an interesting paper, Barankin and Denny essentially formulate the model, but do not describe some of its interesting and relevant ramifications. This paper is written not only to bring out some of these ramifications, but also to describe some computational results using this model. The computational results show that if obsolescence is a distinct possibility in the near future, it is quite important that the probabilities of obsolescence be incorporated into the model before computing the optimal policies.