Horst Salzwedel

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Soft-bottom macrozoobenthos was sampled at monthly intervals between September 1981 and September 1984 at a normally hypoxic site (34 m depth) in Ancón Bay (Peru). Temperature, salinity, and dissolved oxygen were measured and related to changes in community structure. Large increases in the number of species, density, biomass, and diversity of(More)
For genetic algorithms (GAs) researchers look for optimal control parameters, such as population size or mutation rate. Early research was carried out using constant control parameters to find optimal parameter values for GA. The findings are only specific to the considered problem and therefore not suitable to be generalized. In more recent research, it(More)
Complex real time systems like large system on chips need to be verified to assure quality and save time. Today verification activities are restricted to the register transfer level or one design step above. A complete flow from early specifications down to physical implementation is still not available. An improved system level design cycle is required to(More)
System-level design presents special simulation modeling challenges. System-level models address the architectural and functional performance of complex systems. Systems are decomposed into a series of interacting sub-systems. Architectures define subsystems, the interconnections between subsystems and contention for shared resources. Functions define the(More)
In 2004 reimbursement policies of hospitals based on Diagnosis Related Groups (DRGs) have been introduced in Germany. These force hospitals to minimize cost of treatment and improve quality of care, in order to attract more patients and become more competitive. To achieve these goals hospital processes have to be optimized and compared with processes in(More)
Networked systems in automobiles and aircraft are designed by groups of people, departments and/or companies of different expertise. Commonly used design methodologies in complex system design partition the work at high level of uncertainty into teams of specialists. These teams have to make assumptions and design decisions without being able to evaluate(More)
System-level design presents special simulation modeling challenges. System-level models address the architectural and functional performance of complex systems. Systems are decomposed into a series of interacting sub-systems. Architectures define subsystems, the interconnections between subsystems and contention for shared resources. Functions define the(More)