Vattenfall and Svenska Kraftnät perform start-up tests, where hydropower generators are used to power up the electrical grid in case of a blackout. To monitor the electrical grid, Phasor Measurement Units (PMU) are used. Each PMU is individually equipped with a GPS-receiver to precisely Timestamp the data relative to the official time UTC. During the test, it is also of interest to Timestamp the measurement signals from individual hydropower generators to later compare with PMU-data, and thus study the power grids impact on the generator. The aim is to work out an appropriate method to make these measurements and to build a data acquisition system, capable of Timestamp data relative to UTC, from a generator in one of Vattenfalls hydroelectric power stations. The problem is that the generator is located in an underground station which hampers the reception of GPS-signals and wiring should be avoided if possible. Time synchronization has been solved by using Vattenfalls network, which is synchronized by the network protocol NTP.

Samtidighetskonflikt, även känt under den engelska termen concurrency conflict, uppstår när två eller flera processer försöker uppdatera samma information i en databas vid samma tidpunkt. Processen som sparar ändringarna sist blir de ändringar som gäller och på så sätt kan viktigt information försvinna. Det finns flera tillvägagångssätt för att förhindra dessa problem med olika typer av samtidighetskontroller som kan ske i applikationen eller redan på databasnivå via lagrade procedurer.Metoden som används för att undersöka problemområdet har utgått från ett praktiskt arbete med en utökning av en existerande applikation, webbutiken RoyalDesign, skriven i ASP.NET (ASP-dotnet) Web Forms. Utökningen kräver samtidighetskontroll där användaren ska informeras av eventuella konflikter. Undersökningen avser att granska hur samtidighetskontroll implementeras och hanteras i applikationen.

Business Process Modelling Notation (BPMN) is a way to graphically draw a diagram of a business process. A BPMN diagram consists of several so-called flow objects. These are interconnected in the graph through sequence  flows. BPMN models are merely graphical representations of business process and there is a need to simulate these diagrams for different purposes. The simulation that now is available for BPMN is that the model is evaluated by checking if it is correct.

Business Process Modelling Notation (BPMN) is a way to graphically draw a diagram of a business process. A BPMN diagram consists of several so-called flow objects. These are interconnected in the graph through sequence  flows. BPMN models are merely graphical representations of business process and there is a need to simulate these diagrams for different purposes. The simulation that now is available for BPMN is that the model is evaluated by checking if it is correct.