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Models and experiments of the evolution of age- and/or size-at-maturation in response to population harvesting have consistently shown that selective harvesting of older and larger individuals can cause earlier maturation. These predictions, however, are all based on single-species considerations and thus crucially neglect the selective forces caused or mediated by species interactions. Here we de
Aims: Adverse social factors predict increased mortality. This study aimed to assess the influence of social class and marital status on mortality, adding an adult life course perspective. Methods: In total, 32,907 males and 20,204 females were evaluated based on census data in Malmo, Sweden. Of these subjects, 22,444 males and 10,902 females also took part in health screening. The main outcomes w
Women are a neglected group for cardiovascular disease. Whereas young women tend to have lower incidences of coronary artery disease, stroke and myocardial infarctions than men, the situation changes drastically at menopause, after which women are at greater risk than men. Despite this, women at all ages receive less treatment, less attention and not enough information about health risks. Most ris
In this paper we extend Merton's (Rev. Econom. Stud. 42 (1975) 375) classic stochastic version of the Ramsey model by allowing the government to control the expected growth rate of the labor supply. We characterize the solution to this control problem for general time-separable preferences, and derive an analytical solution for the CRRA case. The results show to what extent the planner, or governm
European air traffic control is undergoing changes in organization and technology in order to increase efficiency in air traffic. Change processes can have a negative impact on existing safety cultures, the foundations of safety work, and on safety. This paper reports on an assessment of safety culture at one administrative and two operative units in a Swedish air traffic control setting, using qu
We propose a modified layered structure for multiple-input multiple-output systems, where the layer detection order is fixed and the data rate for each layer is allocated based on the detection order and channel statistics. Using a Gaussian approximation of the layer capacities, we derive an asymptotic optimum data-rate-allocation approach. For optimum data-rate allocation, the amount of backoff f
1. The present study was aimed at examining P2 receptor-mediated vasodilatation in human vessels. The isometric tension was recorded in isolated segments of the human left internal mammary artery branches precontracted with 1 muM noradrenaline. 2. Endothelial denudation abolished the dilator responses. 3. The selective P2Y1 agonist, 2-MeSADP, induced a potent vasodilatation (pEC50=6.9plusminus0.1)
Hepatitis B virus (HBV) has eight genotypes which have distinct geographical distributions. Studies comparing differences in the clinical outcomes of infections caused by strains with genotype-related variations in the HBV genome have largely compared genotypes B and C and genotypes A and D but not all four genotypes. The present study included 196 HBV-infected patients attending an infectious dis
This paper assesses the performance of poverty alleviation projects, asks why so many have failed, and why successful projects have been successful. It gives a retrospective. overview of the development of the concept of poverty, and argues that the way towards poverty eradication goes through holistic, participatory, approaches that build on sharing of knowledge and learning by doing. Projects an
Background We have previously documented significant differences in orthogonal P wave morphology between patients with and without paroxysmal atrial fibrillation (PAF). However, there exists little data concerning normal P wave morphology. This study was aimed at exploring orthogonal P wave morphology and its variations in healthy subjects. Methods 120 healthy volunteers were included, evenly di
We have undertaken a systematic investigation of spectroscopic properties of lanthanide ions (Z=57-71). Using time-resolved laser-induced fluorescence following one- or two-photon excitations, a large number of radiative lifetimes have been measured at the Lund Laser Centre for singly, doubly and trebly ionized atoms. These new measurements have been used for testing theoretical calculations perfo
Bile-tolerant Helicobacter species such as Helicobacter pullorum, Helicobacter bilis, and Helicobacter hepaticus are associated with hepatic disorders in animals and may be involved in the pathogenesis of chronic liver diseases (CLD) in humans. Antibody responses to cell surface proteins of H. pullorum, H. bilis, and H. hepaticus in serum samples from patients with CLD, a randomized population gro
Objective To examine the safety and efficacy of endovascular management of isolated infrarenal aortic occlusive disease within our centre. Design and methods Retrospective analysis of all patients who underwent endovascular treatment of occlusive disease that is confined to the infrarenal aorta between September 1993 and November 2004. Results Primary aortic stenting was carried out in 16 wom
X-linked hyper-IgM syndrome (X-HIM) is an immunodeficiency caused by mutations in the gene encoding the CD40 ligand (CD40L). A database (CD40Lbase) of CD40L mutations has now been established, and the resultant information, together with other mutations reported elsewhere in the literature, is presented here.
Two bitter stigmastane derivatives, vernoguinosterol (1) and vernoguinoside (2), have been isolated from the stem bark of Vernonia guineensis and their structures eludicated using spectroscopic methods. The new compounds exhibit trypanocidal activity.
