Search results

Popular Abstract in Swedish Vid vattenabsorption i en polymer antas vattenmolekylerna röra sig genom polymeren via små kaviteter, som inte upptas av polymermolekylerna och dess termiska vibrationer. Den ej upptagna volymen, som de små kaviteterna representerar kallas fri volym. Storleken på kaviteterna liksom andra egenskaper hos polymeren såsom andelen kristallin fas ändras kontinuerligt i takt mDuring moisture uptake in polymers, the diffusion of the water molecules is believed to occur via unoccupied voids. These voids are called free volume cavities and their sizes are continuously altered when the moisture content in the polymer is enhanced. Not only the free volume cavity sizes, but also other polymer properties such as the degree of crystallinity, are changed as a consequence of moi

During the last years work has been carried out in collaboration between Lund University, WSP Acoustics and the Royal Institute of Technology (KTH) in Stockholm, to bring more basis for impact sound evaluation in the field situation. Results from this study so far, indicate that current international (ISO 717) method is unsatisfactory, and improvements are probably necessary. In this paper we disc

Abstract not available

In this study, the adsorption of nonionic amphiphiles from aqueous solutions to solid, planar surfaces is investigated using null ellipsometry. This technique allows independent measurements of the amounts adsorbed at the surface and of the mean optical thickness of the adsorbed layer. The time resolution is sufficient for investigating the dynamics of adsorption and desorption in systems of this

We present recent advances in the modelling and simulation of Internal Traverse Grinding, a high performance grinding process incorporating a high rate of material removal combined with a high surface quality. Due to a special grinding wheel geometry, the latter two goals are achieved in just one pass of the tool through the axisymmetric workpiece. The simulation framework we present generally con

Att drabbas av cancer blir en påminnelse och ett hot om livets slut. Det finns då ett behov av att navigera i en fragmenterad och okänd livssituation. På okänt cancervatten är en studie baserad på 19 cancerpatienters berättelser om sina vardagsliv. Syftet med studien är att genom öppna intervjuer lyssna och iaktta vad informanterna ansåg viktigt i sina liv. Att förstå och finna mönster i hur de ha

The standard approach in feedback control systems is to sample and control periodically. For some applications, such as networked control systems or severely energy-constrained systems, it could be advantageous to instead use event-based control schemes. Aperiodic control (that is, event-based control with no specified minimum inter-event time) of first-order stochastic systems has been investigat