In this paper we will present part of the work carried out by CINECA in the framework of the PRACE-2IP project aimed to study the effect on performance due to the implementation of a 2D Domain Decomposition algorithm in DFT codes that use standard 1D (or slab) Parallel Domain Decomposition. The performance of this new algorithm are tested on two example applications: Quantum Espresso, a popular...

In this paper we present Boolean techniques for reducing the power consumption in two-level combinational circuits. The two-level logic optimizer performs the logic minimization for low power targeting static PLA, general logic gates and dynamic PLA implementations. We modify Espresso algorithm by adding our heuristics that bias the logic minimization toward lowering the power dissipation. In o...

I argue that it is not possible to accurately represent our task settings as closed environments with a single well defined cost structure. Natural environments are places where many things are done, often at the same time, and often by many people. To appreciate the way such invariants of everyday life affect design I present a case study, a micro-analysis of espresso making at Starbucks to sh...

Morgens halb acht in Deutschland: Über den Fernsehschirm tickern die aktuellsten Börsenkurse, das Smartphone zeigt die Mails der Nacht, bei einem Espresso gelingt ein fl üchtiger Blick in die Tageszeitung. In dieser Welt des Jetzt und Sofort erscheint alles möglich – doch tatsächlich bleibt so vieles auf der Strecke. Wie sind wir in den Strudel der Zeitverdichtung geraten? Sind die neuen Medien...