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Utilizing mobile applications in the area of industrial field service promises several benefits, especially improved process support due to a tight integration of mobile workers and tailored information support. In this paper, we describe four mobile service business patterns derived from two industrial case studies. The first case study deals with the seamless integration of service engineers, while...
Event-based systems are increasingly gaining widespread attention for applications that require integration with loosely coupled and distributed systems for time-critical problems such as closed loop decision-making on operative levels with low latency. In this paper, we present the event processing language EAExpression for concisely defining event stream operations, such as filter conditions or...
In web service environment, long transactions always take long time to finish, which demands the resources - often the database - to be locked for a long time. This would bring down the performance of the transaction processing system. The normal solution is compensating transaction, which creates a relative transaction with the opposite effect. When the transaction is being executed, the sub-transactions...
Social networks based on free plus premium (Freemium) business model offer basic services for free, while charging premium for advanced features with added value to a small subset of users. While a large loyal user base is indispensable, social connections and interactions with people paying for premium services may, to a great extent, influence the probability of free users to become pay users. We...
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