Renate Dippel

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The main goal of the HERA-B experiment which will start taking data in 1998 is to study CP violation in B decays. This article describes the concept and the planned implementation of a multi-processor system, called processor farm, as the last part of the data acquisition and trigger system of the HERA-B experiment. The third level trigger task and a full(More)
The HERA-B experiment[1, 2] is designed for observation of CP violation in the B-meson system at the HERA machine in DESY. The data acquisition and triggering system must cope with a half million detector channels, a 40 MHz interaction rate and a signal to background ratio of 10 ?10. A highly selective multi-level trigger and high bandwidth data acquisition(More)
MalT is the central transcriptional activator of all mal genes in Escherichia coli. Its activity is controlled by the inducer maltotriose. It can be inhibited by the interaction with certain proteins, and its expression can be controlled. We report here a novel aspect of mal gene regulation: the effect of cytoplasmic glucose and glucokinase (Glk) on the(More)
For the HERA-B experiment a processor farm for the third level trigger and full event reconstruction is planned. It will consist of more than 100 processor nodes, receiving data via high speed data links from a switching network. In 1996, a VME-based system (test farm) was built to test a possible implementation. In parallel, investigations of alternative,(More)
For the HERA-B experiment, which will start taking data in 1998, a multi-processor system (processor farm) is planned to perform the third level trigger task and the full event reconstruction online. To study possible architectures and implementations of hardware and software, it is foreseen to build a test system for the processor farm in 1996. If the(More)
The software environment used to control a large switching architecture based on SGS-Thomson STC104 (an asynchronous 32-way dynamic packet routing chip) is presented. We are evaluating this switching technology for large scale, real-time parallel systems. A Graphical User Interface (GUI) written as a multi-thread application in Java allows to set the switch(More)
Controlled release carbidopa/levodopa (CSR-1) was compared to standard carbidopa/levodopa in a double-blind, crossover study of 20 Parkinson's disease patients. The most consistent finding in a variety of clinical measurements was the superiority of standard carbidopa/levodopa to CSR-1. Increased dosages of CSR-1 resulted in reduced Parkinson symptoms,(More)
Intact Sprague-Dawley female rats were treated with 0.25 microgram or 1.25 micrograms ethinyl-estradiol (EE) in combination with one of 3 synthetic progestins: (5 micrograms) norethindrone, norethynodrel, or norgestrel. In Experiment 1 both dosages of EE in combination with the synthetic progestins suppressed sweetness preference, with a somewhat greater(More)