Michael Zapf

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The mobile agent paradigm can be employed effectively for the decentralized management of complex networks. Nevertheless, legacy management protocols such as SNMP need to be supported for reasons of migration and efficiency. We show how the integration of the two paradigms leads to a flexibly adjustable decentralized management architecture. NetDoctor is a(More)
The effects of growth conditions, trace metals, carbon and nitrogen source on ochratoxin A (OTA) production by Aspergillus ochraceus NRRL 3174 were investigated in submerged liquid culture medium. No correlation between biomass production and OTA synthesis was observed. OTA production depended on the initial pH and was influenced by changing the pH of the(More)
AIMS The objective of this study was to evaluate the capability of Fusarium culmorum to produce non-hydrophobin surface-active proteins in vitro, to isolate and characterize such proteins from liquid cultures, to analyse their effect on overfoaming (gushing) of beer and to elucidate their prevalence in pure cultures and infected malt. METHODS AND RESULTS(More)
Ultrasound is frequently used to evaluate suspicious masses in breasts. These evaluations could be improved by taking advantage of advanced imaging algorithms, which become feasible for low frequencies if accurate knowledge about the phase and amplitude of the wave field illuminating the volume of interest is available. In this study, we compare five(More)
The primary purpose of a wireless sensor network (WSN) is to collect and disseminate sensory data and possibly perform some calculations. However, there are no convenient frameworks in place to allow instant access to this sensed information in a programming environment. Using a model-driven approach, we present a development tool to support applications(More)
Enterprises apply SOAs to implement business processes as services which are adaptive to software changes and updates. Service management has to ensure high availability, performance and fault tolerance and is therefore crucial for the undisturbed functionality of a SOA. However, manual service management is cumbersome with a large amount of services and(More)