The term 'system model' is used in many different domains, fields of application and in various forms with different meanings. One of model-based systems engineering's targets is the generation of a system model, which is used to describe complex system aspects across multiple views of disciplines and technical domains. Often a system model generated with systems modeling language is used as a central placed model in development. Besides, there are practical approaches, where models generated with other languages are also sometimes called system models. The scope of this paper is a generic definition of the term 'system model' and its interactions with other types of models in a model-based development ecosystem. Based on the analysis of the actual situation, a concept for the definition of system models is presented, which enables the use of multiple system models and which helps to understand the interactions with other types of models. For better comprehension of a system model's role in development, a three dimensional cube for visualization of system models and specific models is presented. Coupled with the definition of the term, interactions to other approaches like product lifecycle management and the vision of a single source of truth for development are investigated and discussed.

32S and 12C induced compound reactions on Fe, Ni and Se targets have been used to produce neutron deficient nuclei in the mass region 84 _< A < 87. In-beam ?-ray spectroscopy consisting of the measurement of excitation functions, 77 coincidences and ?-ray angular distributions has been performed. The following level energies and spin-parity values have been deduced:

The residual activities of the projectile-target system 4~ have been investigated with gamma and proton multi spectrum analyses, 7~' and P7 coincidences. A//decaying high-spin isomer in 95pd with J~=(21/2+), a half-life of 14+_ls and an excitation energy of about 2 MeV has been identified. It has been found that 9Spd'n is a/~ delayed proton precursor. The total 13 branching to proton emitting states has been determined to be (0.74_+0.19). 10 -2. It has been observed that the final state in 94Ru, populated after proton emission, is dominantly the 8 + state. A decay scheme of 9Spd" has been derived.

Engine crank case designs for passenger car applications are based today on two main material technologies: grey cast iron and an increasing share of aluminium-based concepts. Due to the low wear resistance of aluminium, the latter concepts require a wear protective layer for the cylinder bore surface. Iron-based thermal spray coats are widely used for this purpose. The coating improves the tribological behaviour significantly, as previous studies have shown. Additionally, aluminium-based concepts offer advantages regarding engine weight and thermal management. The aim of the presented work was the discussion of these technological concepts regarding the tribological and sealing properties of the piston/bore interface. The study was carried out based on the AVL FRISC Floating Liner Engine. While the basic engine remained unchanged, the cylinder bore surface was varied. In addition to the floating liner friction measurement, the blow-by and lube oil consumption were also measured. A state-of-the-art multi-body dynamic simulation model complements the experimental study, while both simulation and measurement lead to similar conclusions.

Using 7Y coincidences the EC(K)/fl + ratio for the /3 decay 148Dy~148Tb has been determined. 14aDy has been produced through the irradiation of 93Nb with 249 MeV S8Ni ions. The mass of 148Dy has been deduced. With the help of known Qe values the masses of 152Er, 156yb, 16~ and 164W have been obtained. The experimental masses are compared with different current mass formulae.