A new air traffic knowledge management system is vitally important for the safety and efficiency of future air travel. It can be accomplished by developing a new-generation integrated operational decision support for pilots and controllers. At present the knowledge for decision making is only available when the latter parties share it and negotiate it in real-time. A new policy is required with...

This paper proposes a model for estimating car delays at bus stops under mixed traffic using probability theory and queuing theory. The roadway is divided to serve motorized and nonmotorized traffic streams. Bus stops are located on the nonmotorized lanes. When buses dwell at the stop, they block the bicycles. Thus, two conflict points between car stream and other traffic stream are identified....

URET is designated as the conflict probe for the Federal Aviation Administration's Free Flight Program. Objective analyses of the conflict detection and notification functions of URET are known as functional performance assessments. This paper introduces metrics and techniques that are applied to perform these assessments on data recorded from the URET systems at the Memphis and Indianapolis Ai...

This study presents an approach to incorporate optimisation in the strategic conflict resolution service for unmanned aircraft systems (UAS) traffic management. A conventional line with First-Come, First-Served (FCFS) principle is introduced, following generation of two types flight plans (i.e., li...

Optimistic replication of data is becoming increasingly popular in distributed systems. However, the performance characteristics of such systems are not well understood. We have developed a simulation to evaluate optimistically replicated file systems in terms of their operating costs (e.g., computing resources) and service quality (e.g., consistency of data perceived by users). The simulation ...

For the investigation of major traffic accidents, larger vessels are obliged to install a voyage data recorder (VDR). However, not every vessel is equipped with VDR, and readout often manual process that costly. In addition, only ship-related information can be relevant for reconstructing but also from other entities such as meteorological services or port operators. Moreover, another challenge...