Auskommen mit dem Einkommen: Auswirkungen von familienrelevanten Transfers und Steuererleichterungen auf die Einkommenssituation von Familien in Österreich

In Österreich gibt es auf Bundesebene zahlreiche Familienleistungen, deren Ziel es ist, einen Lastenausgleich für Familien herbeizuführen und sie materiell zu unterstützen. Die vorliegende Studie beschäftigt sich mit den Auswirkungen dieser familienrelevanten Transfers und Steuererleichterungen auf die Einkommenssituation von Familien. Dabei wird sowohl der Anteil der Familienleistungen am verfügbaren Haushaltseinkommen untersucht, als auch Verteilungsaspekte für unterschiedliche Familientypen am Beispiel von Modellfamilien sowie mit Hilfe von repräsentativen Erhebungen analysiert. Zudem werden Schätzungen zum Ausschöpfungsgrad einzelner familienpolitischer Maßnahmen vorgenommen und es wird der Frage nachgegangen, ob die Unterhaltskosten, die durch Kinder entstehen, in genügender Weise steuerlich freigestellt sind

Control-oriented modeling of a LiBr/H2O absorption heat pumping device and experimental validation

Absorption heat pumping devices (AHPDs, comprising absorption heat pumps and chillers) are devices that use thermal energy instead of electricity to generate heating and cooling, thereby facilitating the use of waste heat and renewable energy sources such as solar or geothermal energy. Despite this benefit, widespread use of AHPDs is still limited. One reason for this is partly unsatisfactory control performance under varying operating conditions, which can result in poor modulation and part load capability. A promising approach to tackle this issue is using dynamic, model-based control strategies, whose effectiveness, however, strongly depend on the model being used. This paper therefore focuses on the derivation of a viable dynamic model to be used for such model-based control strategies for AHPDs such as state feedback or model-predictive control. The derived model is experimentally validated, showing good modeling accuracy. Its modeling accuracy is also compared to alternative model versions, that contain other heat transfer correlations, as a benchmark. Although the derived model is mathematically simple, it does have the structure of a nonlinear differential-algebraic system of equations. To obtain an even simpler model structure, linearization at an operating point is discussed to derive a model in linear state space representation. The experimental validation shows that the linear model does have slightly worse steady-state accuracy, but that the dynamic accuracy seems to be almost unaffected by the linearization. The presented new modeling approach is considered suitable to be used as a basis for the design of advanced, model-based control strategies, ultimately aiming to improve the modulation and part load capability of AHPDs

Generation of speech and sound by mathematical functions

Lutter P, Müller-Wernhart M, Ramharter J, Rattay F, Slowik P. Generation of speech and sound by mathematical functions. Presented at the Austrian Mathematical Society, 6th Annual Meeting, Leoben, Austria

Speech research with WAVE-GL - Software tools for creating and manipulating sound files

Lutter P, Müller-Wernhart M, Ramharter J, Rattay F, Slowik P. Speech research with WAVE-GL - Software tools for creating and manipulating sound files. Dr. Dobb's Journal. 1996;21(11):50-52+96-97