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We present a variant of the HMC algorithm with mass precondi-tioning (Hasenbusch acceleration) and multiple time scale integration. We have tested this variant for standard Wilson fermions at β = 5.6 and at pion masses ranging from 380MeV to 680MeV. We show that in this situation its performance is comparable to the recently proposed HMC variant with domain… (More)

We test a variety of blocking and smearing algorithms for constructing glueball and string wave-functionals, and find some with much improved overlaps onto the lightest states. We use these algorithms to obtain improved results on the tensions of k-strings in SU(4), SU(6), and SU(8) gauge theories. We emphasise the major systematic errors that still need to… (More)

We extend our earlier investigation of the finite temperature deconfinement transition in SU(N) gauge theories, with the emphasis on what happens as N → ∞. We calculate the latent heat, L h , in the continuum limit, and find the expected behaviour, L h ∝ N 2 , at large N. We confirm that the phase transition, which is second order for SU(2) and weakly first… (More)

We analyzed the expression and function of eyeless (ey) and twin of eyeless (toy) in the embryonic central nervous system (CNS) of Drosophila. Both genes are differentially expressed in specific neuronal subsets (but not in glia) in every CNS neuromere, and in the brain, specific cell populations co-expressing both proteins define a longitudinal domain… (More)

In a recent paper [1] we presented precise lattice QCD results of our Eu-ropean Twisted Mass Collaboration (ETMC). They were obtained by employing two mass-degenerate flavours of twisted mass fermions at maximal twist. In the present paper we give details on our simulations and the computation of physical observables. In particular, we discuss the problem… (More)

INTRODUCTION
This study was designed as an external validation of the recently proposed Predicting Death for Severe ARDS on V-V ECMO (PRESERVE) score, The respiratory extracorporeal membrane oxygenation survival prediction (RESP) score and a scoring system developed for externally retrieved patients on extracorporeal membrane oxygenation (ECMO) at our… (More)

- Urs Wenger
- 2008

A new parametrization is introduced for the fixed point (FP) action in SU(3) gauge theory using fat links. We investigate its scaling properties by means of the static quark-antiquark potential and the dimensionless quantities r 0 T c , T c / √ σ and r 0 √ σ, where T c is the critical temperature of the deconfining phase transition, r 0 is the hadronic… (More)

- Urs Wenger
- 2004

We use a continued fraction expansion of the sign–function in order to obtain a five dimensional formulation of the overlap lattice Dirac operator. Within this formulation the inverse of the overlap operator can be calculated by a single Krylov space method and nested conjugate gradient procedures are avoided. We point out that the five dimensional linear… (More)

- Philipp Rüfenacht, Urs Wenger
- 2000

On anisotropic lattices, where generally the lattice is rather coarse in spatial directions, a parametrized classically perfect action could help reducing lattice artifacts considerably. We investigate the possibility of constructing such actions for SU(3) gauge theory. We present two different methods to do so, either repeating the procedure used to create… (More)

- Adrian Oeftiger, Uwe-Jens Wiese, Urs Wenger
- 2010

This bachelor thesis deals with nonrelativistic supersymmetric quantum mechanics in one dimension. We will discuss the formalism of Su-persymmetry along with a few applications such as the infinite square well potential and the harmonic oscillator. Special attention will be given to the delta-well potential first as a single and thereafter periodically… (More)