Zusammenfassende Dokumentation des Laborautomatisierungssystems Radar für die Analytik einer Kernbrennstoff Wiederaufarbeitungsanlage

This report represents the condensed documentation of the computer-based laboratory automation system RADRAR (Remote Analytical Data Acquisition and Reduction) for the analytical laboratory of a reprocessing facility for high temperature reactor fuel elements. The essential tasks of the system are on-line open-loop process control based on in-line measurements and automation of the offline analytical laboratory. The in-line measurements (at 55 tanks of the chemical process area) provide density-, liquid-, level-, and temperature values. The concentration value of a single component may easily be determined, if the solution consists of no more than two phases. The automation of the off-line analytical laboratory contains laboratory organization including sample management and data organization and computer-aided sample transportation control, data acquisition and data processing at chemical and nuclear analytical devices. The computer system consists of two computer-subsystems: a front end system for sample central registration and in-line process control and a central size system for the off-line analytical tasks. The organization of the application oriented system uses a centralized data base. Similar data processing functions concerning different analytical management tasks are structured into the following subsystem: man machine interface, interrupt- and data acquisition system, data base, protocol service and data processing. The procedures for the laboratory managernent (organization and experiment sequences) are defined by application data bases. Following the project phases, engineering requirements-, design-, assembly-, start up- and test run phase are described. In additionfigures on expenditure and experiences are given and the system concept is discussed

Scaling Parameters for Dynamic Diffusion-Reaction over Porous Catalysts

The effect of diffusion resistance in porous solid catalysts on reaction rate during periodic cycling of CO concentration is shown for CO oxidation over Pt/Al2O3 by numerical simulation. At some cycling frequencies, the average reaction rate during cycling is higher than the steady-state rate at the mean CO concentration, as expected for this nonlinear, reactant-inhibited reaction. In order to identify major aspects of dynamic diffusion-reaction behavior, a simple kinetic mechanism that shows the main features of CO oxidation and other reactions with significant inhibition by reactants is investigated. A single dimensionless parameter group, the dynamic diffusion coefficient, is added when going from steady-state to unsteady-state diffusion-reaction equations. In the dynamic diffusion coefficient, the rate at which the gas-phase reactant diffuses is reduced by the surface adsorption capacity of the catalyst. The frequency at which the peak average rate occurs is controlled by the dynamic diffusion coefficient

γ\gamma-Scanning als Routineverfahren zur Qualitätskontrolle von Borosilikatglasblöcken aus der Verfestigung von HAW

The homogeneity of the fission p roduct concentration within the glass-matrix is the essential factor determining the rate of activity being librated from the glass blocks in rase of contact with water. $\gamma$-Scanning is proposed as a new method for the determination of the distribution of radioactivity within the cylindrical glass blocks. The detection liits of the method for conglomerate structures of radioactivity are estimated by a model calculation

Association Between Gout and All-Cause as well as Cardiovascular Mortality: A Systematic Review

# The Author(s) 2012. This article is published with open access at Springerlink.com Abstract Gout affects 1 % to 2 % of the population, and the prevalence is increasing due to changes in diet and the ageing of the population. Its development and risk factors have been explored frequently, and recommendations for the diagnosis and management of gout implemented. Nevertheless, there is a lack of knowledge regarding the long-term impact on gouty patients. This systematic review therefore evaluates the association between gout and all-cause as well as cardiovascular mortality. A systematic literature search was performed, and seven long-term studies were ultimately analyzed. Six of them used multivariate regressions to assess the adjusted mortality ratio in gouty patients with reference to patients without the disorder. Despite differences in study designs, study populations, and definitions of gout, the results were consistent: There was an independent association between gout and all-cause as well as cardiovascular mortality. Knowing that patients with gout are at risk emphasizes the need for adequate care. Keywords Gout. Mortality. All-cause mortality. Cardiovascular mortality. Systematic review. Association

Erfassung und Modellierung der thermischen Wechselwirkungen von Umgebung und Maschine

In order to analyze the thermal behavior of machine tools under various practical conditions, a thermal cell can be used for experimental investigations at the Fraunhofer IWU. The article describes the metrological principles and procedure for thermal studies under defined boundary conditions

Déplacement du bolus dans l'oesophage et la jonction oesogastrique dans le reflux gastro-oesophagien et après fundoplicature (étude à partir d'enregistrements simultanés des bruits de déglutition et de séquences vidéoradiologiques)

Le but de cette étude était d analyser l organisation des 3 composantes du bolus dégluti (air mélange baryte), d évaluer leur temps de passage à travers la jonction œsogastrique, d établir des comparaisons avec les bruits xiphoïdiens à partir d acquisitions acoustiques et radiologiques simultanées chez des patients opérés d un reflux gastroœsophagien(NF). Les surfaces des trois composantes et leurs temps de transit étaient mesurés, la durée du signal xiphoïdien et le nombre de groupe de vibrations étaient évalués. L origine des bruits était déterminée. La décantation air-baryte était perturbée. Après NF, le passage du bolus était plus rapide. Avant NF, le bruit xiphoïdien était composé de groupes de vibrations plus nombreux et plus espacés. Après NF, la durée du bruit et le nombre de groupes de vibrations diminuaient. Le bruit xiphoïdien était généré par le passage de l air et d une partie du mélange à travers la jonction œsogastrique.TOURS-BU Médecine (372612103) / SudocPARIS-BIUP (751062107) / SudocSudocFranceF