Nationwide claims data validated for quality assessments in acute myocardial infarction in the Netherlands

Cardiolog

Inwoners enquete Eindhoven 1999 - VSO

Survey among inhabitants of Eindhoven, autumn 1999. Liveability and safety / drugs / health / events / concert hall / dogshit / satisfaction about contacts by telephone with municipalit

Low-temperature synthesis of eitelite, Na2CO3.MgCO3.- Neues Jahrbuch für Mineralogie

Abstract: Up to now eitelite could be synthesized in laboratory experiments only when temperatures of 333 K or more were used. In the present paper experiments are described in which eitelite nucleation took place at 298 K. Essential element in the low-temperature synthesis of eitelite was found to be some form of periodicity. Successful tests involved the periodical addition of a small amount of a magnesium bicarbonate solution to a mixture of sodium carbonate and sodium hydrogen carbonate. In a typical experiment 2 cm 3 of a magnesium bicarbonate solution (containing 0.2 g magnesium hydroxy-carbonate dissolved in 1 dm 3 H 2 O with excess CO 2 bubbled through) would flow once per half hour onto a mixture of 5 g Na 2 CO 3 plus 20 g NaHCO 3 . A heat lamp and fan secured the complete desiccation at a constant temperature of 298 ± 2 K during half-hour intervals. After this phase of desiccation another 2 cm 3 of the magnesium bicarbonate solution would flow onto the sodium salts and desiccate again. Subsequent tests revealed that it is not necessary to use a mixture of Na 2 CO 3 plus NaHCO 3 . When using either of these salts the solid in contact with the periodically desiccating magnesium bicarbonate solution eitelite will also form. Several experiments were carried out in an attempt to obtain a static control for the described lowtemperature synthesis of eitelite under fluctuating conditions. Tests employing magnesium bicarbonate solutions saturated with both sodium hydrogen carbonate and sodium carbonate were not successful. Even when using a saturated magnesium bicarbonate solution, at the same time saturated with NaHCO 3 and Na 2 CO 3 , no form of magnesium would precipitate. Further tests based on the reaction between a saturated solution of NaHCO 3 added to magnesium hydroxy-carbonate were more successful. It was established that for this reaction a minimum temperature of 323 K is required when adding the two ingredients in one action. In a fluctuating system a different minimum temperature was found: When adding periodically small amounts of a saturated NaHCO 3 solution to a quantity of magnesium hydroxy-carbonate, eitelite forms already at 298 K. The described low-temperature synthesis of eitelite has far-reaching consequences for the dolomite problem. It has now been established that the so-called dehydration barrier of magnesium cations in aqueous solution can be overcome, at low temperature, through the influence of fluctuations. K e y w o r d s: Eitelite, low-temperature synthesis, dolomite. * Studies on irreversible geochemical reactions no. 6 Low-temperature synthesis of eitelite, Na 2 CO 3 .MgCO 3 -J.C. Deelman

Inwoners enquete Eindhoven 2000 - VSO

Survey among the inhabitants of Eindhoven Inner city of Eindhoven / technology items / green space / leisure / participation Background variables: basic characteristics/ residence/ household characteristics/ income/capital assets/ education/ politic

Speeding up Power Estimation of Embedded Software

Power is increasingly becoming a design constraint for embedded systems. A processor is responsible for energy consumption on account of the software component of the embedded system. The power estimation of this component is a major concern due to the rising complexities of processors and the slow estimation tools. This work attempts to estimate the energy dissipation of the PR1900 processor based on instruction set model with improved accuracy. The model is integrated in a simulation framework and validated. Over 200 times speedup has been obtained with average 1.4% loss in accuracy over gate level estimation. Analysis of the energy dissipated by the instruction vis a vis the processor architecture has been carried out and a substantial reduction in the measurement effort to build the processor energy model has been achieved

A Bahadur-Kiefer theorem beyond the largest observation A Bahadur-Kiefer theorem beyond the largest observation A BAHADlJR-KIEFER THEOREM BEYOND THE LARGEST OBSERVATION

It is shown that under natural extreme-value conditions a distributional Bahadur-Kiefer theorem holds in a point lying outside the sample. The limiting distribution is degenerate if the extreme-value index is equal to one; the proper refinement for that case is also established. In both cases the limiting distribution is chi-square with one degree of freedom