The envelope process is a useful analytical tool which is often used to study wave groups. Most research on statistical properties of the envelope, and thus of wave groups, was focused on one dimensional records. However for the marine application, an appropriate concept should be two dimensional in space and variable int time. Although a generalization to higher dimensions was introduced by Adler

Popular Abstract in Swedish Om ljuspartiklar (fotoner) uppnår tillräcklig hög energi kan dessa omvandlas till ett partikel- anti-partikel par under en kort tidsrymd. Det är då möjligt får två sådana fotoner att kollidera och det går då studera ljusets struktur. I denna avhandling studeras kollisioner där ljuset har fluktuerat till hadronsk materia och där hela kinematiken i två-foton kollisionen äThis thesis is mainly an analysis of data taken by the VSAT detector in the DELPHI experiment at the LEP II collider at CERN. The analysis spans from 1998 to 2000, with a center of mass energy ranging from 189 to 206 GeV. The VSAT calorimeter was constructed to be a luminosity and background monitor for the DELPHI experiment, and a full description of the luminosity and background analysis for the

Geomechanical simulation of the evolution of a geological structure can play an important role in predicting open fracture development for all stages in that structure's development. In this work, three such geomechanical simulations are used to predict the evolving stress and strain fields, including dilational and compactional changes in the rock fabric in developing fault and fold systems. Thei

The economic history of colonial Bechuanaland has generally been under researched. In this article we aim at redeeming this situation by constructing real wage series for various occupations 1900-1960 using records from the colonial archives. We calculate nominal wages, subsistence consumption baskets and real wages. Our mapping means that we fill an existing knowledge gap. Throughout the text we

In an increasingly competitive environment, technical innovation in products and processes is by a vast number of manufacturing companies regarded as one of the most powerful enablers to differentiate from competitors and achieve competitive advantage. Accordingly, some manufacturing companies spend significant amounts of investments in innovation projects. In this paper, we examine the relationsh

I många klassrum står läraren och ett fåtal studenter för i stort sett all kommunikation medan de flesta är passiva åhörare. Lärare har länge sökt efter verktyg och metoder för att öka studenternas delaktighet och skapa en interaktiv lärandemiljö. Ett beprövat, men i Sverige ännu ganska ovanligt, verktyg är att använda sig av mentometersystem. Ett mentometersystem består av trådlösa mentometerdoso

This chapter presents a brief review of studies on swirling and non-swirling impinging jets. Also, a numerical investigation of heat transfer from impinging swirling jets is described. Various turbulence models are used. Comparison with experimental data is provided. Generally, the V2f model was found to perform better than other models, but for small nozzle-to-plate distances, it was hard to main

In neuroscience a number of new techniques have been developed by means of which it has become possible to study the activity of the living human brain. By means of these techniques we are beginning to understand the neurophysiology behind environmental attitudes and preferences. In addition to an introduction to cognitive neuroscience, this invited symposium contains a number of presentations, wh

High-level modeling languages are receiving increased industrial and academic interest within several domains, such as chemical engineering, thermo-fluid systems and automotive systems. One such modeling language is Modelica. Modelica is an open language, specifically targeted at multi-domain modeling and model re-use. Key features of Modelica include object oriented modeling, declarative equation