26 research outputs found
(final) Higgs results from LEP
Contribution to "Rencontres de Moriond, QCD and hadronic interactions", Les
Arcs, France, March 2002Comment: 4 page
LSF usage for batch at CERN
Contributed poster to the CHEP07. Original abstract: LSF 7, the latest version of Platform's batch workload management system, addresses many issues which limited the ability of LSF 6.1 to support large scale batch farms, such as the lxbatch service at CERN. In this paper we will present the status of the evaluation and deployment of LSF 7 at CERN, including issues concerning the integration of LSF 7 with the gLite grid middleware suite and, in particular, the steps taken to endure an efficient reporting of the local batch system status and usage to the Grid Information Syste
Usage of LSF for batch farms at CERN
CERN uses Platforms Load Sharing Facility (LSF) since 1998 to manage the large batch system installations. Since that time, the farm has increased significantly, and commodity based hardware running GNU/Linux has replaced other Unix flavors on specialized hardware. In this paper we will present how the system is set up nowadays. We will briefly report on issues seen in the past, and actions which have been taken to resolve them. In this context the status of the evaluation of the most recent version of this product, LSF 7.0, is presented, and the planned migration scenario is described
Data Preservation at LEP
The four LEP experiments ALEPH, DELPHI, L3 and OPAL successfully recorded
e+e- collision data during the years 1989 to 2000. As part of the ordinary
evolution in High Energy Physics, these experiments can not be repeated and
their data is therefore unique. This article briefly reviews the data
preservation efforts undertaken by the four experiments beyond the end of data
taking. The current status of the preserved data and associated tools is
summarised.Comment: 7 pages, contribution to proceedings of the "First Workshop on Data
Preservation and Long Term Analysis in HEP
Regional trends in soil acidification and exchangeable metal concentrations in relation to acid deposition rates
The deposition of high levels of reactive nitrogen (N) and sulphur (S), or the legacy of that deposition, remain among the world's most important environmental problems. Although regional impacts of acid deposition in aquatic ecosystems have been well documented, quantitative evidence of wide-scale impacts on terrestrial ecosystems is not common. In this study we analysed surface and subsoil chemistry of 68 acid grassland sites across the UK along a gradient of acid deposition, and statistically related the concentrations of exchangeable soil metals (1 M KCl extraction) to a range of potential drivers. The deposition of N, S or acid deposition was the primary correlate for 8 of 13 exchangeable metals measured in the topsoil and 5 of 14 exchangeable metals in the subsoil. In particular, exchangeable aluminium and lead both show increased levels above a soil pH threshold of about 4.5, strongly related to the deposition flux of acid compound