In various fields like software development, information systems development, and ebusiness development, model-based approaches allow specifying different models of which each emphasizes one specific aspect or part of the software system. In this thesis we consider particularly model-based approaches for defining inter-organizational cooperations. These cooperations are usually complex in terms...

Naive Bayes is a fast to train model for sequence classification. We develop and experiment with two methods that are equally fast (they require only one pass through the training data), but they are also able to models interactions among close neighbours in the sequence (unlike the Naive bayes independence assumption). The first method basically runs Naive Bayes on overlapping k-grams obtained...

This paper disseminates the survivor function of inter-trade durations as a key feature of the intraday trading process. It sheds light on the time varying trading intensity and, thus, liquidity of a traded asset and the information channels which propagate price signals among asymmetrically informed market participants. To obtain a consistent estimate of the baseline survivor function and capt...

Many enterprise systems employ both object-oriented middleware (OOM) and message-oriented middleware (MOM). However, support for the integration of object and messaging services, in particular for transaction processing across object and messaging components, is very limited. In this paper, we introduce the concept of Dependency-Spheres (D-Spheres), a global transaction context for distributed ...

In this paper, we propose an algorithm called PITP-Miner that utilizes a projection based approach to mine frequent inter-transaction patterns efficiently. The algorithm only searches for local frequent items in a projected database that stores potential local inter-transaction items and partitions the database into a set of smaller databases recursively. In addition, two pruning strategies are...

Different versions of peer-to-peer electronic cash exist as data represented by separate blockchains. Payments between such systems cannot be sent directly from one party to another without going through a financial institution. Bitcoin provided part of the solution but its utility is limited to intra-blockchain transactions. The benefits are lost if a trusted third party is required to execute...

From March 1998, the inter-bank settlement of most high value wholesale payments in New Zealand will occur on a real time gross settlement (RTGS) basis. This means that the interbank transfer of funds associated with each such payment will be posted to the exchange settlement accounts of the paying and receiving banks at the Reserve Bank, transaction by transaction, irrevocably and ahead of val...

Parallel database systems have to support both inter-transaction as well as intra-transaction parallelism. Inter-transaction parallelism (multi-user mode) is required to achieve high throughput, in particular for OLTP transactions, and sufficient cost-effectiveness. Intratransaction parallelism is a prerequisite for reducing the response time of complex and dataintensive transactions (queries)....