Results 1 - 10 of 35535
Results 1 - 10 of 35535. Search took: 0.037 seconds
|Sort by: date | relevance|
[en] Job processing and data transfer are the main computing activities on the WLCG infrastructure. Reliable monitoring of the job processing on the WLCG scope is a complicated task due to the complexity of the infrastructure itself and the diversity of the currently used job submission methods. The paper will describe current status and the new strategy for the job monitoring on the WLCG scope, covering primary information sources, job status changes publishing, transport mechanism and visualization.
[en] Analysis of large amounts of data from the Lhc will start very soon. I give an overview here of the challenges faced by this analysis in an environment where the computing resources are spread across the world. An outline is given of the tools used by individual physicists, the performance of the systems and the monitoring performed. I use this information to collect a set of best practise recommendations for the future.
[en] The system presented is the Searle Nuclear-Chicago Data Processor for Nuclear Medicine, the Clincom. The system has been designed to fulfil the data processing needs in the daily routine in a nuclear medicine department, where computer-skilled personnel is normally not available. Therefore one of the outstanding requirements in the design has been the ease of operation. A clinical program has been developed that enables a large number of routines to be performed by pressing just a pushbutton on the front panel. A further design criterium has been that the Clincom could be placed at a reasonable distance of the camera for example in another room, in order to optimise both patient's and operator's convenience
[en] This paper reports the procedure to extract an upper limit of a peak area in a multichannel spectrum. This procedure takes into account the finite shape of the peak and the uncertanties in the background and in the expected position of the peak. (author)
[pt]Este trabalho trata de como extrair o limite superior da area de um pico de um espectro obtido no multicanal. Este procedimento leva em consideracao: a forma do pico, a incerteza do background e a posicao do pico. (A.C.A.S.)
[en] A data processing system designed to facilitate inventory taking is described. The process depends upon the earliest possible application of computer techniques and the elimination of manual operations. Data is recorded in optical character recognition (OCR) 'A' form and read by a hand held wand reader. Limited validation checks are applied before recording on mini-tape cassettes. 5 refs
[en] The technique described should be considered as a first step towards the classification of scintigraphic data where the energy is included. As in all such studies the interpretation of the resulting images is not necessarily at first evident, and certain experience needs to be established. This applies in particular to the images obtained with the higher factors. It is possible that the use of this technique may resolve, without requiring a priori information, the problem previously encountered using the other 'subtraction' type techniques
[fr]La technique decrite peut etre consideree comme une premiere etape vers une classification des donnees scintigraphiques incluant l'energie. Comme dans toutes les etudes de ce genre l'interpretation des images resultantes n'est pas necessairement evidente de prime abord, et une certaine experience est necessaire pour l'etablir. Cela s'applique en particulier aux images obtenues avec des facteurs eleves. Il est possible que l'utilisation de cette technique puisse resoudre, sans exiger une information a priori, le probleme deja rencontre en utilisant les autres techniques de soustraction
[en] The theory of frequency analysis and its use in the linear scintigraphy processing is presented. The main noise cleaning linear stationary filters and the linear stationary filters employed for enhancement of scintigraphic image are described
[fr]Dans la premiere et la deuxieme partie de cet expose, on a presente les fondements theoriques de l'analyse frequentielle ainsi que son utilisation pour le filtrage lineaire des images scintigraphiques. Apres la description des principaux filtres lineaires invariants independants du systeme scintigraphique, on traite dans cette partie des filtres lineaires invariants de correction de resolution. Dans la quatrieme partie de ce travail, on exposera les principaux filtres lineaires variables ainsi que les quelques filtres non lineaires utilises en scintigraphie
[en] The LHCb experiment, based at the Large Hadron Collider at CERN, Geneva, is preparing for the first data taking during 2008. The LHCb computing architecture for processing and analysing the data in a distributed computing environment is introduced. The readiness of the computing tools needed for physics analysis is addressed. The experience of transparently harnessing the distributed computing resources is reported