This paper describes a long term, high-resolution study of the activityof the Perseid meteor stream based on visual and radar observations atthe Onsala Space Observatory in Sweden. The data consists of 147 visualhourly rates and 1368 radar hourly rates. In a previous paper (Lindblad2000) a high-resolution study of the visual zenithal hourly rates ofbright Perseid meteors versus solar longitude was

This thesis concerns the effects of low-dose oral contraceptives (OCs) on endogenous hormones, insulin-like growth-factor-1 (IGF-1), sexual hormone binding globulin (SHBG), and body constitution in two groups of healthy women aged 19­25 who had never been pregnant. Prolactin concentrations were elevated in a subgroup of present and former users. IGF-1 concentrations were significantly decreased du

Under de senaste decennierna har nationella politiska system gått från att vara hierarkiska och territoriellt välavgränsade till att bli såväl flernivåbaserade som gränsöverskridande. Detta har onekligen haft konsekvenser för demokratin. Med utgångspunkt i den svenska utvecklingen problematiserar vi, i denna rapport, kort begreppet flernivådemokrati och studerar dess eventuella förtjänster och bri

Lichens, a form of symbiosis between a fungal and a photosynthetic partner, are believed to be a group that evolved early in the history of terrestrial life. As a consequence, they probably experienced higher ultraviolet (UV) radiation fluxes than at present. However, in the last two decades, due to the depletion of the stratospheric ozone layer, increasing levels of ultraviolet-B radiation (280-3

Popular Abstract in Swedish Reglering av celltillväxt och celldöd är mycket viktigt för bibehållandet av balansen mellan antalet olika celler i kroppen. Om regleringen rubbas kan olika sjukdomar uppkomma, som karakteriseras av för mycket celltillväxt eller av för mycket celldöd. Exempel är cancer, där man har för mycket tillväxt, samt många degenerativa sjukdomar som diabetes, Parkinsons och aids,Apoptosis is a kind of death that is best described as cellular suicide and it is important for normal tissue homeostasis. The process can be induced by a number of different stimuli and the dying cell goes through a defined pathway terminating in typical biochemical and morphological alterations of the cell. With my studies I wanted to investigate the role of the polyamines in the regulation of a

Recycling has traditionally been promoted for environmental reasons, but it also has increasing economic importance. A review of the development of the concept of green economy indicates that recycling is an integral part of green economy. This report is about recycling and different aspects of its economic importance for Europe such as turnover, trade within and out of Europe and job creation. Th

Intermittently administered PTH is known to increase bone mass in osteoporosis models. We studied its effects in bone repair and implant fixation, using histological and mechanical techniques in rats. In a bone chamber, PTH substantially increased the density of the new-formed bone, whereas there was only a minor effect on the pre-existing bone in the L5 vertebra or femur. Considering that PTH inc

Projektet är ett samarbete mellan LTH och åtta gymnasieskolor i närregionen som startade under hösten 2007 och går ut på att använda den s.k. SI-metodiken som komplement till den ordinarie undervisningen i naturvetenskapliga ämnen. SI-övningarna leds av teknologer från LTH. Syftet med projektet är flera: att förbättra samverkan mellan LTH och gymnasieskolor i närregionen; öka intresset för naturve

Answers to prepared questions by the editors on developments in Romania from 1989 to 2009, asked of several experts of Romania. Views on the Romanian revolution and the success of the transition to democracy. Translated from English to Romanian

This paper is devoted to a discussion of Catford's and Fischer-Jørgensen's defence of the classical vowel articulation model (1, 2, 3). Objections to the model are not directed at Bell's personality, but at the theoretical structure of his model: critical functions of the model are contradicted by empirical data and by acoustical theory. Nor are the ojections only relevant for amendments introduce