Optical codes with large cardinality and tree structures of multiple subsets of codewords for adjustable code performance and cardinality have recently been proposed. As studied in this paper, these characteristics support multicode-keying encryption for enhancing physical-layer confidentiality in optical code-division multiple-access systems and networks. The concept of the multicode-keying encryption technique is introduced. The associated all-optical […]

Implementation of carrier sensing-based medium access control (MAC) protocols on inexpensive reconfigurable radio platforms has proven challenging due to long and unpredictable delays associated with both signal processing on a general purpose processor (GPP) and the interface between the radio frequency (RF) front end and the GPP. This paper describes the development and implementation of […]

Modeling for dependability is an established method in the domain of information systems. Most approaches dealing with structural or probabilistic modeling do not consider time information. This paper presents an approach for modeling dependable information systems for fault prediction. Established analysis techniques are applied to a particular learned model. These should reveal path to failure […]

Logistics is an interdisciplinary field. Modern logisticians need to integrate business management skills with technology design, IT systems know-how and other engineering fields. However, based on research of university curricula and competence standards in logistics, the engineering aspect is not represented in full potential. There are a few treatments of logistician competences relating to engineering, […]