An exactly solvable problem with energy dependent interaction is investigated in the present paper. The selfadjoint model operator describes the scattering problem for three one-dimensional particles. It is shown that this problem is equivalent to the diffraction problem in the sector with energy dependent boundary conditions. The problem is solved with the help of the Sommerfeld-Maluzhinetz repre

In this study, a qualitative perspective of how 13 women (aged 25 to 61 years) with spinal cord injury perceive the importance of social support for their participation in occupation is presented. The data were collected through repeated in-depth interviews and field notes, and the analysis used a grounded theory approach. The women needed both emotional and practical support, which was important

This report contains abstracts of master theses (examensarbete) made at the Department of Automatic Control, Lund, during the academic year 78/79. During this year 9 theses were made by 12 students. The theses are written in Swedish with an English abstract.

Osteoprotegerin (OPG), a secreted member of the tumor necrosis factor receptor family, is a potent inhibitor of osteoclast activation and differentiation. In animal models OPG prevents bone loss, and in humans bone resorption can be reduced by injections of OPG. OPG may also play a role in cardiovascular disease since mice lacking the OPG gene display arterial calcification. In a screening effort

The new genus Masionhalea is segregated from Cetraria s. lat. on the basis of anatomy, morphology, ecology and chemistry. Its only species, M. richardsonii (Hook. in Richardson) Kärnef. is described and illustrated and a distribution map is provided.

I Hus AMA 98 behandlas tätning av fogar i avsnitt ZSB. Vad gäller fogmassor för byggfogar har aktuella delar av SS-ISO 11 600 arbetats in.

We present here numerical simulations of surface solar convection which cover a box of 30 x 30 x 3.2 Mm(3) with a resolution of 315 x 315 x 82, which is used to investigate the dynamics of scales larger than granulation. No structure resembling supergranulation is present; possibly higher Reynolds numbers (i.e. higher numerical resolution), or magnetic fields, or greater depth are necessary. The r

Young vertebrates have limited capacity to synthesize antibodies and are dependent on the protection of maternally transmitted antibodies for humoral disease resistance early in life. However, mothers may enhance fitness by priming their offspring's immune systems to elevate disease resistance. Transgenerational induced defences have been documented in plants and invertebrates, but maternal primin

Medical students at a Swedish university were satisfied with their choice of future profession and they felt that the studies were stimulating. However, they experienced their student role as unclear, and that there was a lack of feedback from the teachers. The medical students showed a higher level of stress in comparison with non-medical students. The women had more stress and mental symptoms th

A previously healthy 3-month-old girl presented with symptoms of meningitis, diarrhoea, vomiting and fever. Green monkey kidney (GMK) cells inoculated with cerebrospinal fluid (CSF) revealed reovirus-like particles by electron microscopy. RNA-gel electrophoresis, immunofluorescence and virus neutralization identified the pathogen isolated from CSF as reovirus type 1. Antibody determination by immu

We prove that smooth solutions of the Degasperis-Procesi equation have infinite propagation speed: they loose instantly the property of having compact support.

A new idea for generation of quadrature signals on chip is presented. The topology is based on a passive RC polyphase filter, where the resistive parts are made active by using inverters. The active filter combines quadrature generation, isolation, and gain without losing quadrature performance compared to a regular RC polyphase filter. The filter technique is demonstrated in a 10 GHz front-end ap