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In this paper we give a general three-dimensional treatment of electromagnetic scattering from a finite obstacle in a stratified half space. The two generic cases of an obstacle either below all layers or inside one of the layers are treated. The results are an extension of earlier works on scattering in related geometries, treated by means of the T matrix method. Numerical results are presented f
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Within the framework of the Swedish national trial with Intelligent Speed Adaptation (ISA) in urban areas, the effects of large scale use of “active accelerator” were evaluated. 284 cars were equipped with the system for a period of 5-11 months in the city of Lund. The driving data of all equipped vehicles were logged with regard to time and speed, both before and after activating the system. Driv
På konferensen presenteras det avslutande kapitlet i avhandlingen "Sjukskrivningssystemet: Sjuka som blir arbetslösa och arbetslösa som blir sjukskrivna" (se annan post).
Oscillation frequency and damping of electro-mechanical modes in a power system have traditionally been determined from events caused by large disturbances such as line switchings or generator tripping. Recent papers have shown the possibility to extract this information during normal operation from measurements of power through, or angle difference across, a transmission line. In this paper these
Electricity and gas prices are characterized by sharp increases or decreases in their price, followed a few days later by an equally large decreases or increases. These phenomena are called spikes or drops and are causing headaches for system developers and planners. One of the explanations for the spikes are sudden increases in demand (eg cold weather) and/or decreases in supply (eg emergency shu
