Volume 13 Number 1 March 2025

    
A Structured Replication Control Protocol with a Logical Two-Dimensional Structure

Robert Basmadjian and Hermann de Meer

https://doi.org/10.6025/stj/2024/13/1/1-13

Abstract Data replication is used in large distributed systems to provide high fault tolerance and improve performance. However, when replication is used, the data becomes vulnerable to inconsistency issues. Replication control protocols (RCPs) are needed to “synchronize” concurrent read (queries) and write (writes) operations on the replicated data. The purpose of this document is to ask if a single protocol can... Read More


The Interconnected System of Programmable Logic Controllers Using a Distributed Architecture

Reiner Saykowski, Elferik Schultz, and Joachim Bleidiessel

https://doi.org/10.6025/stj/2024/13/1/28-30

Abstract This work marks a significant step in the modernization of interconnected systems. We introduce cost-efficient, standardized, and modular components, a novel approach in this context. For the first time, we implement Commercial Off-The-Shelf (COTS) products in an interconnected system using a distributed architecture. This innovative use of COTS products is expected to lead to further cost savings and significant efficiency... Read More


Calculating the Shortest Drivers’ and Passengers’ Paths

Arthur Bit-Monnot, Christian Artigues, Marie-José Huguet, and Marc-Olivier Killijian

https://doi.org/10.6025/stj/2024/13/1/14-27

Abstract Carpooling can reduce traffic congestion and the environmental impact of car use. This paper addresses an important problem for dynamic carpooling: calculating the shortest drivers’ and passengers’ paths. These paths are synchronized in that they have a common sub-path between 2 points: the point where the driver picks up the passenger and the point where the passenger drops off the... Read More