Erik Wallin

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We review common extensions of particle-in-cell (PIC) schemes which account for strong field phenomena in laser-plasma interactions. After describing the physical processes of interest and their numerical implementation, we provide solutions for several associated methodological and algorithmic problems. We propose a modified event generator that precisely(More)
An important issue in Internet marketing is the possibility of designing autonomous agents that are able to interpret subjective values in goods and services. From the customers' point of view, it is important to evaluate all aspects linked to the product before purchasing, not only easily identified objective parameters such as the price. From a marketing(More)
The paper is about a personalization system that utilizes descriptions of information characteristics to perform content based filtering in order to increase stated business objectives. Data from almost two million unique visits on the website of one of Sweden's largest online recruitment services are analyzed. The first time a visitor enters the website,(More)
Today's increasing information supply raises the need for more effective and automated information processing where individual information adaptation (personalization) is one possible solution. Earlier computer systems for personalization lacked the ability to easily define and measure the effectiveness of personalization efforts. Numerous projects failed(More)
The paper deals with a personalization system that utilizes descriptions of information characteristics to perform content based filtering in order to increase stated business objectives. The paper reports from testing of the personalization system in two commercial implementations, the website of Sweden's third largest daily newspaper and the website of(More)
Over the last two years Lund University has devoted much energy to create distance learning facilities for both traditional student groups and-to a growing extent-for employed people in industry and the public sector in need of continuos learning. The courses cover a number of rapidly changing fields of knowledge and competence, such as information and(More)