To be able to guarantee service quality end-to-end Quality of Service has to be deployed. This thesis addresses the problems with applying QoS end-to-end over today’s Internet. A rather pessimistic conclusion states that QoS over Internet is hard (impossible?) to realize without introducing virtual circuits or similar. The concept of flows and label switching is introduced. Some QoS techniques are

Gesture-based interaction constitutes a new paradigm in human-machine interaction. The possibility to control a technical system with gestures on surfaces or in mid air makes it possible to design user interfaces that go beyond the WIMP paradigm (Windows Icons Menus and Pointers), the dominating interaction paradigm since the 1970's. After mainly having been of interest in the human-computer inter

The pattern of linearly polarized light in the sky can be used for orientation behavior by many insects. Although such behavioral responses have been well described in bees and ants over several decades, until recently it remained largely elusive how polarized-light information is processed in the insect brain. However, over the last decade, substantial advances in understanding polarized- light p

A straightforward gradient expansion of the exchange energy of a perturbed electron gas is performed. Studied perturbations range from very weak to those that produce, e.g., a silicon-like band structure with a band gap. The expansions involve density gradients up to fourth degree and we include all terms originating in linear- and second-order response theory. The expansion reproduces exactly cal

This paper deals with policy measures in the regional innovation system of Scania, Southern Sweden. Focus is dedicated to requirements on innovation policy from actors representing different industries. Previous studies have identified profound differences with regard the organization of knowledge sourcing between firms and other actors in industries drawing on different knowledge bases. In corres

This thesis discusses the feasibility of a low emittance lattice proposed for the MAX-IV storage rings. The MAX-IV facility will have two storage rings that are identical but operated at two different energies, 1.5 GeV for soft X-ray and 3 GeV for hard X-ray production. The lattice is built to take advantage of the small gap insertion devices that imply small apertures in the magnet elements whic

Popular Abstract in Swedish På 70-talet upptäckte man att en grupp mikroorganismer, som man tidigare katalogiserat som bakterier, bildade en helt egen grupp. Dessa kallades ärkebakterier och fick senare namnet arkéer. Arkéer är små (ca 1 tusendels millimeter) encelliga organismer precis som bakterier, men de skiljer sig på många sätt från dem. Till exempel har de en kemiskt annorlunda uppbyggd celDuring the last decade it has been discovered that around 2% of the soil-living prokaryotes belong to the domain Archaea. In many soils the most abundant archaeal group is the ammonia-oxidizing archaea (AOA) that, in addition to ammonia-oxidizing bacteria (AOB), preform the first and rate-limiting step in the nitrification process. The knowledge of factors that regulates the archaeal abundance and

The aim of this study of the Mexican Mural Movement is to analyze the myths it expressed and the myths it produced. The two main characters of my study are the minister José Vasconcelos and the painter Diego Rivera, because I believe these two personalities are indispensable for an understanding of the myths surrounding the Mexican Mural Movement. While the painter is well known, the personality a

A qualitative model of moisture distribution in screeded concrete slabs is presented. From this model it is possible to identify humidity changes in each material and thus determine corresponding moisture properties. The distribution of relative humidity, RH, was determined in nine screeded concrete slabs before flooring and after a certain time of redistribution. Moisture redistribution is clearl

Internet traffic from a fibre based residential access network is investigated concerning traffic volumes and link load. Also the cost of the services is analyzed. We show that 1 Mbps accesses subscribers maintain high loads, and that the price they pay per GB used is five times higher than the one paid by 100 Mbps access subscribers.