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This paper presents an interactive tool which allows to study the problem of systems with delays. The developed tool provides several examples in order to compare PI control and Smith Predictor approaches for processes with delay. Robustness problems due to presence of model uncertainties can also be studied, as well as other control structures to face the different problems that the original Smit
The deactivation of alumina-supported platinum catalyst for VOC oxidation by long-term exposure for hexamethyldisiloxane (HMDS) has been investigated in a pilot scale reactor for up to 1000 h of exposure. Catalyst samples were characterized by ICP-AES, BET and silicon deposition by SEM. Catalyst activity was investigated using oxidation of ethyl acetate showing deactivation of the catalyst samples
A major problem when using software platforms to produce a variety of products relates to keeping a high quality of the platform throughout the development of the products. For a software platform development to be successful, it is essential to master the quality issues when managing and designing the platform. This thesis presents approaches that enable efficient use of the soft-ware platform
Popular Abstract in Swedish Alla kemikalier vi använder oss av och utsätter oss för påverkar både oss och den omvärld vi lever i. Under hela sin livscykel har de en påverkan på miljön, från de att man utvinner råmaterialen, när de tillverkas och när vi använder dem. Till och med efter att vi använt dem har kemikalierna en påverkan på miljön. Det gäller både schampot som följer med duschvattnet ut It is of at most importance that society reduces its impact on the environment. In the chemical industry the use of renewable resources will play a fundamental role in the transition to more sustainable chemical products. Also industrial biotechnology, i.e. the use of enzymes to convert raw material into valuable chemicals at low temperatures, leads to more sustainable processes. The research pres
Popular Abstract in English At our workplace, at home, and on the road, we rely on software. It has become one of the central technologies on which we base our society. Yet, software is perhaps the major technology that is understood the least by the general population. Most software today is written in languages that requires the programmer to specify not only what is to be achieved, but also hoWriting efficient parallel programs is the biggest challenge of the software industry for the foreseeable future. We are currently in a time when parallel computers are the norm, not the exception. Soon, parallel processors will be standard even in cell phones. Without drastic changes in hardware development, all software must be parallelized to its fullest extent. Parallelism can increase perfor
Under årens lopp har människan gjort stora landvinningar inom läkemedelsforskning, vilket har lett fram till avancerade läkemedel som idag tas för givna. Avancerade läkemedel sätter dock höga krav på tillverkarna av läkemedel, vilket har lett till att framtagandet av nya läkemedel är en ganska komplicerad process. Faktum är att dagens läkemedelsutveckling är så komplex att alla aspekter förmodligePopular Abstract in Swedish Under årens lopp har människan gjort stora landvinningar inom läkemedelsforskning, vilket har lett fram till avancerade läkemedel som idag tas för givna. Avancerade läkemedel sätter dock höga krav på tillverkarna av läkemedel, vilket har lett till att framtagandet av nya läkemedel är en ganska komplicerad process. Faktum är att dagens läkemedelsutveckling är så komplex
In this paper, we propose an all-digital frequency synthesizer architecture, based on an all-digital ΣΔ-frequency discriminator. The new all-digital synthesizer is compared to previously published work. The architecture of the ΣΔ-frequency discriminator is verified using behavioral simulation.
An important measure for climate change mitigation is reduction of energy use in buildings worldwide. To decrease the energy use of a building in a Nordic climate, increased thermal resistance of the building envelope is a suitable measure. Adding more insulation in combination with climate change may increase the risk of mold growth within the building envelope. This study evaluates hygrothermal
Regular column on theatre in the weekly newspaper Arbetaren (The Worker).
This paper presents some preliminary empirical reflexions about rural development in North East Argentina at the light of the recent socio-economic and political changes. The processes of decentralization that have taken place in the country during the decade of 1990 illustrate the complexity of rural development strategies at local level and the necessity to create policies to take into account t
