INSAFA-AP4: Verfahren zur automatischen Inbetriebnahme geregelter fluidischer Antriebe Schlussbericht

This research project investigated methods permitting an automatic operation of fluidic drives. The first part dealt with methods for experimental identification of black-box models to generate simulation tools with little effort. This task has been solved successfully using universal approximators. Fuzzy and neural networks yield models of high quality, which is realized by the development of efficient training algorithms. In the second part controller algorithms have been developed, that can be automized using fuzzy logic and neural networks. Two variants of a fuzzy-method can be used for adjusting the parameters of a PID-controller automatically. Fuzzy controllers for system classes propose a different approach, which can be tuned in the same way as conventional controllers, but can be adapted to the nonlinearities of the system more properly. In contrast, a model based approach performs a higher quality in a regime instead of a single point of operation. Moreover, this controller can be embedded into a concept, that merely requires a measured data set to generate a control law and the parameters. Neural and selforganizing controllers have been considered as well but they are not suitable for that purpose. (orig.)SIGLEAvailable from TIB Hannover: DtF QN1(77,13) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung und Forschung (BMBF), Bonn (Germany)DEGerman

Management of asthma in hospital - a prospective audit

In a prospective study of management of asthma in hospital patients with acute asthma admitted to a single hospital over a calendar year were surveyed. Altogether 157 out of 194 admissions (81%) were studied. The patients (16 of whom had been admitted twice and one three times) were interviewed at home about two weeks after discharge, and their hospital records were reviewed. When interviewed an appreciable proportion of patients said that their asthma had been poorly controlled after their discharge from the hospital: 54 reported regular sleep disturbance due to wheeze, 78 tightness of the chest in the morning, and 77 wheeze after climbing one flight of stairs. Patients had been described on admission as having had symptoms of deteriorating asthma for a median of three days. Closer questioning of 71 patients, however, elicited that 50 had had regular symptoms indicating poor control for weeks or months. Most patients did not know how their drugs worked, and many did not have an appropriate plan of action in the event of a further attack. In all the cases studied 114 patients were treated with oral corticosteroids, only 70 had had their previous maintenance treatment increased at the time of discharge, and 107 had a follow up appointment booked for an average of three and a half weeks after discharge. These findings show that undersupervision and undertreatment of patients with asthma are common and not confined to those dying of the condition

1975, 97, 7427. (b) Kohl, 71, 727. (29) Tamm. I. Phys. Z. Sowjetunion 1932, 7, 733. (30) Shockley, W. Phys. Rev. 1939, 56, 317. (31) Fan

(20) (a) He-Ne laser. The quantum efficiency at the maximum photocurrent in this cell was about 95%

Electroweak measurements in electron–positron collisions at w-boson-pair energies at lep

Contains fulltext : 121524.pdf (preprint version ) (Open Access

Search for Charged Higgs bosons: Combined Results Using LEP Data

The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have searched for pair-produced charged Higgs bosons in the framework of Two Higgs Doublet Models (2HDMs). The data of the four experiments are statistically combined. The results are interpreted within the 2HDM for Type I and Type II benchmark scenarios. No statistically significant excess has been observed when compared to the Standard Model background prediction, and the combined LEP data exclude large regions of the model parameter space. Charged Higgs bosons with mass below 80 GeV/c^2 (Type II scenario) or 72.5 GeV/c^2 (Type I scenario, for pseudo-scalar masses above 12 GeV/c^2) are excluded at the 95% confidence level