Festigkeitsverhalten der Al-Si-Gusslegierung AlSi12CuNiMg bei erhöhten Temperaturen

Magdeburg, Univ., Fak. für Maschinenbau, Diss., 2011

Intelligente Regelung von nichtlinearen elektromechanischen Systemen

Magdeburg, Univ., Fak. für Elektrotechnik und Informationstechnik, Diss., 2011

Schadstoffverhalten und Lastgrenze der vorgemischten Dieselverbrennung

Magdeburg, Univ., Fak. für Maschinenbau, Diss., 2011

Brennverfahren mit Kompressionszündung für alternative Kraftstoffe

Magdeburg, Univ., Fak. für Maschinenbau, Diss., 2011

Potential strömungsoptimierter Einspritzdüsen bei NKW-Motoren

Magdeburg, Univ., Fak. für Maschinenbau, Diss., 2011

Hemodynamic Effects of Noninvasive Ventilation in Patients with Venocapillary Pulmonary Hypertension

Background: The hemodynamic effects of noninvasive ventilation with positive pressure in patients with pulmonary hypertension without left ventricular dysfunction are not clearly established. Objectives: Analyze the impact of increasing airway pressure with continuous positive airway pressure on hemodynamic parameters and, in particular, on cardiac output in patients with variable degrees of pulmonary hypertension. Methods: The study included 38 patients with pulmonary hypertension caused by mitral stenosis without left ventricular dysfunction or other significant valvulopathy. The hemodynamic state of these patients was analyzed in three conditions: baseline, after continuous positive pressure of 7 cmH2O and, finally, after pressure of 14 cmH2O. Results: The population was composed of predominantly young and female individuals with significant elevation in pulmonary arterial pressure (mean systolic pressure of 57 mmHg). Of all variables analyzed, only the right atrial pressure changed across the analyzed moments (from the baseline condition to the pressure of 14 cmH2O there was a change from 8 ± 4 mmHg to 11 ± 3 mmHg, respectively, p = 0.031). Even though there was no variation in mean cardiac output, increased values in pulmonary artery pressure were associated with increased cardiac output. There was no harmful effect or other clinical instability associated with use application of airway pressure. Conclusion: In patients with venocapillary pulmonary hypertension without left ventricular dysfunction, cardiac output response was directly associated with the degree of pulmonary hypertension. The application of noninvasive ventilation did not cause complications directly related to the ventilation systems.

Kohlenwasserstoff-Emissionen eines Motors mit Benzin-Direkteinspritzung und wandgeführtem Brennverfahren

Hydrocarbon, HC, emissions, gasoline direct injection, stratified, mixture building, hc-model, simulation, flame-quenching, wall-quenching, liquid film building

Component oriented method for simulation of multibody dynamics

Modular modelling, dynamics simulation, multibodies, O(N) method, closed loops, post-stabilization

Modelling the influence of microstructure on elastic properties and tensile damage behaviour of Mo-base silicide alloys

Mo-Si-B alloys, Real microstructures, Voronoi structures, Microstructural characterization, Modelling and finite element simulations, Effective material properties, Damage and Crack growth, tensile strength, fracture toughness

Numerical approximations of population balance equations in particulate systems

Magdeburg, Univ., Fak. für Mathematik, Diss., 2006

Parametrierung elektrischer Äquivalentschaltbilder von PEM Brennstoffzellen

Magdeburg, Univ., Fak. für Elektrotechnik und Informationstechnik, Diss., 2007

Strukturierte Modellierung und nichtlineare Analyse von PEM-Brennstoffzellen

Fuel cell, PEM fuel cell, Network theory, Computer aided modelling, Nonlinear analysis

Simulation of the deformation behaviour of two-phase composites

Two-phase polycrystal, elasto-viscoplastic material model, heterogeneity, anisotropy, flow behaviour, crystallographic texture, strain field

Optimization of radial jets mixing in cross-flow of combustion chambers using computational fluid dynamics

Cross-Flow, Radial Jets Mixing, Temperature Homogenization, Optimization, Combustion Chamber, CFD

Experten-System zur Koordination von Schutzsystemen

Expert System, Inference Engine, Protection Coordination, Protection Device