Popular Abstract in Swedish Stjärnors radialhastigheter har i mer än ett sekel haft betydelse för studiet av Vintergatans och stjärnhoparnas kinematik. Radialhastigheten är den hastighet en stjärna, eller ett annat objekt, har längs synlinjen från en given observatör. Hittills har radialhastigheter bestämts med hjälp av spektroskopi, genom att observera spektrallinjer vars vilovåglängder är kända.This work demonstrates the determination of absolute stellar radial velocities from geometrical principles, i.e. using astrometry. Such `astrometric radial velocities' are obtained independently of spectroscopic information. While spectroscopic radial velocities are affected by line shifts from astrophysical processes on the stellar surfaces, by gravitational redshift and various other effects, as

There has been extensive research about single link multiple-input multiple-output (MIMO) channels, both simulated and measured, but only few studies have targeted multilink analysis with measured channel data. Hence, in this paper, we analyze the influence of spatial separation of user terminals and the human shadowing effect on the MIMO capacity and to the signal to interference ratio (SIR) in a

Complex product form generation methods have rarely been used within the field of industrial design. The difficulty in their use is mainly linked to constraints – such as functionality, production and cost – that apply to most products. By cou-pling a mathematically described morphology to an optimisation system, it may be possible to generate a complex product form, compliant with engineering and

Abstract is not available

The metabolic syndrome includes a cluster of dysfunctions that identifies subjects at high risk of developing type 2 diabetes and cardiovascular disease. The prevalence of the metabolic syndrome has increased markedly over the last two decades. Central to this syndrome is insulin resistance and hyperglycaemia, but also other manifestations, e.g. central obesity, dyslipidaemia, elevated blood press

Within the framework of the European project, PROSPER, field experiments with ISA (Intelligent Speed Adaptation) were carried out in Hungary and Spain. Twenty vehicles in each country were equipped with two kinds of ISA systems: 1) warning via an active accelerator pedal and 2) warning via beep signals and flashing red light when exceeding the speed limit. Both systems are based on a GPS receiver

This volume contains a comprehensive evaluation of the hypthesis that the Gospel of Mark has been influenced by the theology of the apostle Paul. It discusses the history of this view from the nineteenth Century to the modern day, analyses possible historical Connections between the apostle and the evangelist, and compares and contrasts many major theological themes in both the epistles and the Go

Popular Abstract in Swedish Asynkronmotorn är den mest använda elektriska motorn i industriella tillämpningar. För att effektivt kunna varvtalsreglera asynkronmotorn har varvtalet hittills behövt mätas. Den extrautrustning som krävs för varvtalsmätning är dyr och komplicerad. Avhandlingen presenterar en metod som beräknar, eller upskattar varvtalet, istället för att mäta det. För att beräkna varvtThis work focuses on observers estimating flux linkage and speed for induction machines, mainly in the low speed region. With speed estimation, sensorless control is possible, meaning that the speed of induction machines without mechanical speed sensors can be controlled. The observer based sensorless drive system has superior dynamic performance compared to a system with an open loop frequency in