This paper describes how PID controllers can be designed by optimizing performance subject to robustness constraints. The optimization problem is solved using convex-concave programming. The method admits general process descriptions in terms of frequency response data and it can cope with many different constraints. Examples are presented and some pitfalls in optimization are discussed.

Popular Abstract in Swedish Stroke, som kan orsakas av att en hjärnartär blockeras av en blodpropp, är en av de vanligaste orsakerna till död eller handikapp bland vuxna människor, men få behandlingsalternativ existerar. Två olika potentiella behandlingsstrategier är 1) att skydda nervceller från att dö på grund av stroke och 2) att i efterhand ersätta förlorade celler och nervcellskretsar. Ett säIn this thesis, two potential endogenous mechanisms for neuronal survival and repair have been investigated in a rat model of stroke, middle cerebral artery occlusion (MCAO): signaling of the GDNF family of neurotrophic factors, and neurogenesis from endogenous progenitor cells. As determined by in situ hybridization for GDNF family ligand and receptor genes, MCAO caused widespread upregulation o

This book investigates the relationship between the quality of working life (QWL) and competitiveness in the specific context of organisational innovations in Sweden. It proceeds by way of reviewing the literature of both a general theoretical nature on innovations, including Swedish research, and then looks more closely at the empirical evidence on the QWL-competitiveness relationship at the micr

Removal of Ca2+ from PSII lead to impaired electron transfer from YZ to P680+ and to inhibition of S state transitions which results in a modified stable S2 state (probed by a stable multiline EPR signal) and the induction of the S2YZox state ("split" signal) by illumination at 0° C. We have performed an EPR study on the pH dependence of these reactions in Ca2+-depleted PSII (prepared by citrate t

This LUii report presents a research review of the field of over-indebtedness and consumption patterns in digital society, which addresses phenomena such as e-commerce, smart phones and their role in consumption and credit, new methods of payment, debt-incurrence and more. The research review has been produced by researchers at Lund University on behalf of the Swedish Enforcement Authority, why it

Abstract not available

Popular Abstract in Swedish Undersökningar av astrofysikaliska spektra kräver noggranna atomära data, som t.ex. våglängder och övergångssannolikheter. Denna avhandling bidrar med atomära data av hög precision för astrofysikaliska och kosmologiska tillämpningar. Mätningarna har gjorts på ljus producerat i en hålkatodlampa med hjälp av Fouriertransformspektrometri. Genom att observera våglängdsskifInvestigations of astrophysical spectra require accurate atomic data, such as wavelengths and transition probabilities. This thesis provides high-precision atomic data for astrophysical and cosmological applications. The measurements have been carried out using Fourier transform spectrometry on light produced in a hollow cathode light source. The variability of fundamental constants is investigat

The paper discusses the motivation for and outcome of the addition of socially oriented so called “off-task” conversational abilities to an existing “teachable agent” (TA) in an educational mathematics game. The purpose of the extension is to affect constructs known to promote learning, such as self-efficacy and engagement, as well as enhancing students’ experiences of the game. A comparison of st

Popular Abstract in Swedish Populärvetenskaplig sammanfattning Hyaluronan (hyaluronsyra) är en högmolekylär polysackarid som förekommer i all biologisk vävnad i olika koncentrationer, med särskilt höga nivåer i bindväv. Den kan bildas av de flesta celltyper. På molekylär nivå föreligger den i form av ett nystan, har förmågan att binda stora mängder vatten, och har en uttalad pseudoplasticitet. HyaHyaluronan has been found in the eye in varying amounts and at different sites. It is involved in physiological and pathological processes, though many aspects of its bio-logi-cal functions are still unclear. We have studied the role of iris tissue in hyal-uro-nan production in the anterior segment of the eye, and its changes after trauma. After peripheral iridectomy or argon laser treatment, the