This paper studies an allocation problem with multiple assignments, indivisible objects, no endowments and no monetary transfers, where a single object may be assigned to several agents as long as the set of agents assigned the object satisfy a compatibility constraint. It is shown that, on the domain of complete, transitive and strict preferences, group-sorting sequential dictatorships are fully

Popular Abstract in Swedish Denna avhandling behandlar konstnären Elis Erikssons liv och verk ur ett semiotiskt perspektiv. Den semiotiska teori som appliceras i avhandlingen ska ses som en kultursemiotisk eller sociosemiotisk teori. Den är därmed uttryckligen kritisk mot den rigida tillämpning av lingvistiska modeller som så ofta förknippas med semiotiska studier inom humaniora. I enlighet med deThe title of this thesis translates as "Elis Eriksson: Objects and Signs" and concerns the life and work of the Swedish artist Elis Eriksson (1906-2006) as analysed from a semiotic point of view. The semiotic theory applied in the thesis is to be regarded as a theory of cultural semiotics or socio-semiotics, explicitly critical towards the rigid application of linguistic models so often associated

Lightweight timber structures have many advantages, but high-demand acoustic quality is hard to achieve due to the relatively poor insulation through the junctions, especially in the low frequency range (20 Hz-200 Hz) where the weight (mass per unit of area) of a construction is an important parameter for the air-borne insulation properties. Increasing the mass would improve the insulation but thi

The urban climate can vary considerably within cities. In a hot and dry climate, the micro¬climate at street level depends to a large extent on the urban geometry and building density. To be able to plan and design comfortable urban areas in the future, it is important to understand how different urban textures influence the climate. This paper deals with a case study in Fez, Morocco, where climat

In this paper power system security is estimated with a linear support vector machine (SVM). The SVM is used to calculate a hyperplane which separate states of the power system that sustain an (n-1) fault from states that do not. The hyperplane can be used on-line in order to determine if the system is moving into insecure conditions. The proposed method is developed to support operators at contro

Dispossession and displacement have made their imprint on the lives of uncounted millions, and continue to pose the gravest threat to security for many more. The ascent of neoliberalism to global hegemony in recent decades – in all its multifarious and contextually path-dependent varieties – has radically changed the landscape of human vulnerability and security. Its successes in massive global an

The Gaia mission of the European Space Agency (ESA) will produce high-precision astrometry for 10^9 objects up to 20th magnitude. The volume of data generated (about 150TB of compressed raw data) and the complexity of the relationships between them make the scientific processing a challenging task. This paper presents the basic concepts of the core of the astrometric data reduction, the AGIS syste

Using a high pressure chamber, different types of lubricants have been studied at pressures representative of elastohydrodynamically lubricated contacts. The three types of lubricants (solid, liquid and gaseous) have been compressed and sheared to measure the compression, the shear stress as a function of pressure and shear velocity, and the solidification pressure. In the high pressure chamber re

Popular Abstract in Swedish Abstract Hydrogen embrittlement is a degradation process of mechanical/tribological properties (toughness, wear etc.) of mating steel surfaces. This is caused by the presence and interaction of hydrogen with applied stresses. Therefore, it is important to quantify the hydrogen content which could be dissolved under applied stresses in steel. Water contamination of lubriAbstract Hydrogen embrittlement is a degradation process of mechanical/tribological properties (toughness, wear etc.) of mating steel surfaces. This is caused by the presence and interaction of hydrogen with applied stresses. Therefore, it is important to quantify the hydrogen content which could be dissolved under applied stresses in steel. Water contamination of lubricants is often considered as