The research area of business process mining has vastly matured in recent years. Its main focus centers around the extraction and analysis of process models from event logs. A strong emphasis lies on the automatic discovery of models for which numerous algorithms have been proposed already. So far, most discovery algorithms were limited to the derivation of single-paradigm models, which contain...

Process mining is an established approach for analyzing and modeling complex business processes. In this paper we showcase ProMetheuS, a flexible and scalable suite for process mining natively designed for industrial applications. Moving from the experience of the ProM framework, the state-of-art process mining tool, ProMetheuS introduces three innovative designing elements. Firstly, ProMetheuS...

This work investigates the problem of efficient multimedia data encryption. A novel methodology is proposed to achieve encryption by controlling certain operations in the data compression process using a secret key. The new encryption approach consists of two cascaded modules. The first one is called randomized entropy coding (REC) while the second one is called rotation in partitioned bitstrea...

Bitmap indices have gained wide acceptance in data warehouse applications and are an efficient access method for querying large amounts of read-only data. The main trend in bitmap index research focuses on typical business applications based on discrete attribute values. However, scientific data that is mostly characterised by non-discrete attributes cannot be queried efficiently by currently s...

Process-aware Information Systems typically log events (e.g., in transaction logs or audit trails) related to the actual business process executions. Proper analysis of these execution logs can yield important knowledge that can help organizations to improve the quality of their services. Starting from a process model, which can be discovered by conventional process mining algorithms, we analyz...

Image reconstruction from amplitude-only and phase-only data in the fractional Fourier domain applying the inverse fractional Fourier transform is analyzed on the examples of perfect edges of different contrasts and real-world image. © 2003 MAIK “Nauka/Interperiodica”. 1 The question of the importance of phase and amplitude in the Fourier domain has been studied in many publications [1–4]. Ther...