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Yielding behaviour and interaction at bicycle crossings

The main purpose of this study was to learn more about how bicyclists and motor vehicle drivers in some Swedish cities interact at intersections and how the yielding rules, different intersection designs, vehicle flows and speed affect the behaviour. Field studies were performed at 25 crossings for six hours each. Cycle crossings on links, at three- and four-armed intersections as well as at roun

Defect Probability-based System-On-Chip Test Scheduling

In this paper we address the test scheduling problem for system-on-chip. Different from previous approaches where it is assumed that all tests will be performed until completion, we consider the cases where the test process will be terminated as soon as a defect is detected. This is common practice in production test of chips. The proposed technique takes into account the probability of defect-det

Web server traffic in crisis conditions

During recent years we have seen several large-scale crises. The 9/11 terror attacks, tsunamis, storms, floods and bombings have all been unpredictable and caused a great deal of damage. One common factor in these crises has been the need for information and one important source of information is usually web sites. In this work three new sets of web server access logs are presented and analyzed, o

Integrating Fatigue Risk Management into an Airline's Safety Management System

The evolution of a system for the management of fatigue-related risks in airline and maintenance operations is at present a contentious issue. The aspirations for the integration of fatigue risk management processes into existing Safety Management System (SMS) guidelines need to be placed in the realities of the present economic and commercial environment – they therefore need to exhibit relevance

Utilization of Decomposition Techniques for Analyzing and Characterizing Flows

Popular Abstract in Swedish Vetskap om strömning av vätskor och gaser är viktigt i dagens samhälle, vilket inkluderar transport i rör, förbränning, och flödesinducerade vibrationer. På grund av sin flyktiga form är möjligheten att kontrollera flöden i diverse applikationer begränsad. Strömning kan vara väldigt svårt att beskriva och kategorisera, speciellt då höga hastigheter är inblandade. HastigThis thesis presents the utilization of two different decomposition techniques, proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD), for enhanced understanding of flow structures and their stability. The advantages of these techniques are shown for a range of flow situations, most of which are turbulent. It is shown that by these methods additional insight into complex flow