1,264 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
Linear models, signal detection, and the Grassmann manifold
2014 Fall.Standard approaches to linear signal detection, reconstruction, and model identification problems, such as matched subspace detectors (MF, MDD, MSD, and ACE) and anomaly detectors (RX) are derived in the ambient measurement space using statistical methods (GLRT, regression). While the motivating arguments are statistical in nature, geometric interpretations of the test statistics are sometimes developed after the fact. Given a standard linear model, many of these statistics are invariant under orthogonal transformations, have a constant false alarm rate (CFAR), and some are uniformly most powerful invariant (UMPI). These properties combined with the simplicity of the tests have led to their widespread use. In this dissertation, we present a framework for applying real-valued functions on the Grassmann manifold in the context of these same signal processing problems. Specifically, we consider linear subspace models which, given assumptions on the broadband noise, correspond to Schubert varieties on the Grassmann manifold. Beginning with increasing (decreasing) or Schur-convex (-concave) functions of principal angles between pairs of points, of which the geodesic and chordal distances (or probability distribution functions) are examples, we derive the associated point-to-Schubert variety functions and present signal detection and reconstruction algorithms based upon this framework. As a demonstration of the framework in action, we implement an end-to-end system utilizing our framework and algorithms. We present results of this system processing real hyperspectral images
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
ParFORM: recent development
We report on the status of our project of parallelization of the symbolic
manipulation program FORM. We have now parallel versions of FORM running on
Cluster- or SMP-architectures. These versions can be used to run arbitrary FORM
programs in parallel.Comment: 5 pages, 6 Encapsulated postscript figures, LaTeX2e, uses espcrc2.sty
(included). Talk given at ACAT0
Die Basaltindustrie zwischen Rhein, Sieg und Wied : Ein wirtschaftsgeographischer Versuch
Die Untersuchung der Basaltindustrie zwischen Rhein, Wied und Sieg ist der Versuch, einen rheinischen Wirtschaftsraum in seinen geographischen ZusammenhĂ€ngen zu erfassen und darzustellen. Die Erhebungen wurden im Wesentlichen wĂ€hrend der Jahre 1949 und 1950 durchgefĂŒhrt; die HauptzĂŒge der Entwicklung sind jedoch bis 1952 erfasst
Investigation of the use of cellular gene promoters in murine retroviral vectors.
This study investigates the use of cellular promoters in the context of an enhancer-deleted murine retroviral vector suitable for application in gene therapy protocols for treating diseases that affect the myeloid lineage (Schwickerath et al., 2004). Although the theory and practice surrounding enhancer-deleted and self-inactivating vectors has been known for some time, only recently have their attributes been considered to be of primary importance. Our model system for the development of gene therapy has been chronic granulomatous disease/disorder (CGD), an inherited condition affecting the ability of neutrophils to kill invading pathogens, with potentially fatal consequences. The disease is caused by mutations in any one of several components referred to as gp91'"' p6 p4 " ' or p22'""'A which together with rac2 make up the NADPH oxidase complex present in neutrophils and other phagocytes (Casimir and Teahan, 1994 Goldblatt and Thrasher, 2000 Seger and Kzekowitz, 1994 Thrasher et al., 1992 Thrasher et al., 1993 Thrasher et al., 1994). This project aimed to improve the transcriptional output and safety of retroviral vectors in myeloid cells, the cell type affected in CGD and to identify suitable tissue specific and inducible promoters for myeloid specific gene expression, which were employed for the expression of p47 (Rodaway et al., 1990 Teahan et al., 1990), the major cause of the autosomal recessive form of the disease. To prove the functionality of our constructs in vivo, we made use of a p47 "N deficient mouse as a disease model for CGD, which lacks phagocyte superoxide production, thus reflecting an identical phenotype to that seen in human CGD (Jackson et al., 1995 Messina et al., 2002 Mitchison et al., 2005). We conclude to have developed an enhancer-deleted retroviral vector that could provide the basis for a new generation of retroviral vectors with improved safety, by essentially retaining high titre and demonstrated transcriptional activity in myeloid cells, capable of reconstituting very high levels of oxidase activity, comparable to that obtained from normal cells
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