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The problem of robot drilling presents a significant challenge, due to the comparatively low mechanical stiffness of typical serial industrial robots. This compliance makes the robot deflect due to the cutting forces, resulting in poor hole quality. Recently, functionality for high-bandwidth force control has found its way into industrial robot control systems. This could potentially open up the p
Popular Abstract in Danish Ved CERN (Conseil Européen pour la Recherche Nucléaire) accelerer man protoner og bly-ioner op til næsten lysets hastighed, for derefter at kollidere dem med hinanden. Målet med dette er at forstå, hvordan de mindste ting i universet er bygget op, og hvordan de interagerer. Alle tidligere eksperimentelle data er kombineret til en enkelt teori, kendt som StandardModellen This thesis consider the improvement of the simulation tools used to describe high energy particle collisions. These simulation programs are normally referred to as event generators. The emphasis is on two specific parts of the event generation: the introduction of radiation of weak bosons associated with the collision and a new model for colour reconnection. Each collision contains significant
Popular Abstract in Swedish I vår kropp står ämnesomsättningen för nedbrytning av mat till kemiska ämnen som är nödvändiga för vår energiförsörjning, kroppsuppbyggnad och fortplantning. Varje cell i varje organism tillverkar eller tar upp små molekyler, som de sedan sätter ihop till stora molekyler. Samtidigt som detta sker så bryter cellerna ner molekyler som har blivit tillverkade. Ur detta får There are two fundamentally different ways by which a metabolite can be transferred between enzymes in metabolic pathways. If the two sequential enzymes cannot form a complex with each other, the metabolite must first be released from the producing enzyme to the reaction medium and then be transported to the consuming enzyme, via the reaction medium, by free diffusion. If the two sequential enzyme
Both numerical simulations and experimental measurements of small scale spontaneous ignition with different biomass fuels have been performed. In the experiments, temperature history was monitored at five different locations inside the fuel bed. The measured temperature history was used for validation of comprehensive threedimensional computer simulations which were carried out using a parallel fi
Bohemia and Moravia, today part of the Czech Republic, was the first territory with a majority of non-German speakers occupied by Hitler’s Third Reich on the eve of the World War II. Tens of thousands of Jewish inhabitants in the so called Protectorate of Bohemia and Moravia soon felt the tragic consequences of Nazi racial politics. Not all Czechs, however, remained passive bystanders during the g
Although, the stored electromagnetic energy of an antenna is used to determine the antenna Q, it is difficult to define the stored energy. The stored energy can be estimated from the input impedance of the antenna, the electromagnetic fields around the antenna, and the current densities in the antenna structure. These estimates are similar but not equal for all antennas. Here, the different approa
Present work deals with reducing secondary losses in turbine cascade by using boundary layer fences in two ways. Firstly, to reduce the strength of vortex which is incident at the leading edge of airfoil and hence reduce the strength of horse shoe vortex, and secondly, to reduce the pressure gradient between the pressure side and the suction side in the flow passage region between airfoils. In pre
Kommer vi att drabbas av en "metanbomb" när värmen tinar den ständigt frusna permafrosten och värmer upp våtmarkerna och havet i Arktis? Risken för detta nämns i olika sammanhang, och handlar om att stora mängder metangas – en starkare växthusgas än koldioxid – snabbt skulle kunna frigöras och stiga upp i atmosfären. Klimatologen Markku Rummukainen finner att det kanske inte blir någon explosion,
Research on the teaching and learning of mathematical modelling has attracted an increasing interest during the last 20 years. One concept of special significance in this field of research is the modelling competence, related to and intertwined with other mathematical sub-competences. In this paper some results from the research on the teaching and learning of mathematical modelling are presented
Vad är egentligen ett brottsoffer? I samtal, filmer, berättelser och lagtexter används bilden av offerskap på olika sätt. Yrkesutövare, frivilligarbetare på brottsoffer- och kvinnojourer, lagstiftare och andra söker bl a genom denna tillskrivning skapa sympati eller mobilisera fördömanden genom att understryka eller nedtona ansvar, lidande eller det behjärtansvärda, det modiga eller det dumdristig
