Performance optimization remains one of the key issues in parallel computing. Many parallel applications do not benefit from the continually increasing peak performance of todays massively parallel computers, mainly because they have not been designed to operate efficiently on the 1000s of processors of todays top of the range systems. Conventional performance analysis is typically restricted t...

While todays orthography is very strict and seldom changes, this has not always been true. In historical texts spelling of words often not only varies from todays but in some periods even varies from use to use in a single text. Information retrieval on historical corpora can deal with these variations using fuzzy matching techniques based on Levenshtein-Distance using stochastic weights. In pa...

Cooperation in groups often requires individual members to make costly contributions that benefit the group as a whole. Prior research suggests shared norms can help support ingroup cooperation by prescribing common standards of how much contribute. These may be disrupted when undergo membership change, i.e., from outgroups enter ingroup. When newcomers and incumbents have different notions abo...

Experiments at particle colliders have reached center of mass energies well above 100 GeV, equivalent to temperatures which existed shortly after the big bang. These experiments, testing the initial conditions of the universe have, with great precision, established the Standard Model of Particle Physics. In contrast, the existence of the Higgs boson and perhaps Supersymmetry remain speculative,...

In ‘Reversibility or Disagreement’ (this journal), we posed a dilemma for invariantists about epistemic expressions—that is, for those who claim that expressions such as ‘might’ and ‘probably’ make a contextinvariant contribution to the truth conditions of the utterances to which they belong. The crux of our dilemma is simple: invariantists, we argued, cannot make sense of a phenomenon that we ...