Popular Abstract in Swedish Avhandlingen är uppdelad i två delar. Del I analyserar kapacitet för linjära modulationssystem med en bärvåg. Inom dessa system så skickas bitarna som en sekvens av pulser, där varje puls representerar en bit. När pulserna lanseras över kommunikationskanalen, så kommer de utsättas för reflektioner, interferens, och andra störningar. Kapaciteten är en övre gräns på antalThis thesis is divided into two parts. Part I analyzes the information rate of single antenna, single carrier linear modulation systems. The information rate of a system is the maximum number of bits that can be transmitted during a channel usage, and is achieved by Gaussian symbols. It depends on the underlying pulse shape in a linear modulated signal and also the signaling rate, the rate at whic

Moderna mobiltelefoner är ofta utrustade med olika sensorer som används flitigt bland annat för spel, men som också kan användas i fysikundervisningen. Här analayserar vi accelerometer- och rotationsdata från en iPhone4 som tagits med (i en stängd ficka) i åkattraktionen Lilla Lots på Liseberg.

Popular Abstract in English Where are we? And what are all the things we have around us? These are questions that we ask as children when we start to discover the world around us. But just because we grow up does not mean that we find the answers to those questions. Around us, we see things as red buses, blue oceans and yellow flowers. But according to science, it is not these things that we fundaA metal nanoparticle can be considered as consisting of a base of positive ion cores and a sea of free electrons. When the free electrons are displaced, for example, by an incident electric field, a restoring force acts on the electrons. The electrons may then oscillate back and forth until equilibrium is reached. This oscillation occurs at the natural frequency, or eigenfrequency, of the system.

BackgroundMounting collective radiation doses from computed tomography (CT) implies an increased risk of radiation-induced cancer in exposed populations, especially in the young.PurposeTo evaluate radiation dose and image quality at 80-kVp CT to diagnose acute pulmonary embolism (PE) compared with a previous study at 100 and 120 kVp with all other scanning parameters unchanged.Material and Methods

System dynamics is an approach to the modelling and simulation of nonphysical systems. In the past, typical application domains were social, biological, and economical systems. Recently a new application domain has emerged: software development. The report summarises the major results of a study performed to review worldwide activities in the field of system dynamics modelling and simulation appli

Om författaren Axel Wallengren (1865–91)

The notion ‘textual history’ (Sw. texthistoria) has often been used in a narrow philological sense denoting the history of version of a single work. Today it is however, at least in the Nordic languages, used in other connections as well, not least within discourse analysis. The article shows that textual history theoretically could be understood as (1) the history of text(s) as language in use, w

When the maximum load at a three-point bend test on a notched beam is known, Gc can be estimated from a well-known method of linear elastic fracture mechanics. The method, in this case called the indirect method, has proved to be unsuitable for use in Gc-determinations of concrete-like materials. The method is too dependent on the specimen size. Another method of directly determining Gc is also d

PURPOSE OF REVIEW: Endoscopic diagnosis of biliary disease is challenging due to difficulties in access, visualization, and sampling. Recent advances in endoscopic technology, ancillary diagnostic methods, and our understanding of autoimmune pancreatitis (AIP) and IgG4-related cholangitis (IRC) have led to improvements in the endoscopic diagnosis of pancreaticobiliary disease. RECENT FINDINGS: S

Dopamine (DA) replacement therapy with l-DOPA remains the most effective treatment for Parkinson's disease, but causes dyskinesia (abnormal involuntary movements) in the vast majority of the patients. The basic mechanisms of l-DOPA-induced dyskinesia (LID) have become the object of intense research focusing on neurochemical and molecular adaptations in the striatum. Here we review this vast litera

The article outlines the early origin and later transformations of Medieval Archaeology to Historical Archaeology, both as an antiquarian practice and as an academic subject, focusing on the development in Sweden since the 17th C.

Thrombin generation is a key process that determines the extent of a hemostatic plug or a thrombotic process. The ensuing thrombin burst is crucial for the formation of a stable fibrin clot. During its active life, thrombin exerts a multitude of highly regulated actions on the blood and the vessel wall, including the clotting of fibrinogen. The inappropriate generation of thrombin may lead to path

We present a digital solution for the front-end electronics of high resolution calorimeters at future colliders. It is based on analogue signal compression, high speed A/D converters, a fully programmable pipeline and a digital signal processing (DSP) chain with local intelligence and system supervision. This digital solution is aimed at providing maximal front-end processing power by performing w