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A foraging animal is often confronted with uncertainty of resource abundance. A Bayesian model provides the optimal forgaing policy when food occurrence is patchy. The solution of the Bayesian foraging policy requires elaborate calculations and it is unclear to what extent the policy could be implemented in a neural system. Here we suggest a network architecture of three neurones that approximatel
Non-targeted effect of BCG: Several recent studies suggest that BCG has beneficial non-targeted effects on general child survival in low-income countries. Studies of the effect of BCG on morbidity in humans are scarce; some found a positive effect of BCG and others show no effect. Non-targeted effects of vaccines-possible bias and confounding: The major argument against comparing vaccinated and un
In this paper an MMSE estimator of the complex shortime spectrum is considered for optimum noise reduction of speech. The correlation between frequency components is exploited to improve the estimation, especially of those components with low local SNR. Furthermore, by making use of both spectral envelope and time envelope, the estimator is able to suppress noise power infrequency domain and lime
ABSTRACT. This paper addresses the question of whether ‘main clause infinitival datives’ in Russian should be analyzed as oblique or ‘quirky’ subjects, in contrast to another type of subject-like datives in Russian, ‘I-nominals’. In particular, it examines a claim to this effect made by Moore and Perlmutter in a paper in Natural Language and Linguistic Theory (2000). By comparing the datives in qu
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OBJECTIVES: Sleep deprivation has experimentally been shown to adversely influence glucose metabolism, endocrine function and sympathovagal balance in young men without known serious disease. We investigated the impact of sleep problems and resting heart rate in a large sample of self-reported, healthy middle-aged men and women on long-term mortality. METHODS: In all 22,444 men and 10,902 women pa
n one week of November 2000 and 2002, a diagnosis-antibiotic prescribing study was performed in general practice in 5 counties in Sweden. In total 11 515 patients were registered with a diagnosis of an infectious disease. Skin- and soft tissue infections were responsible for 10% of the visits and 13% of the antibioitc prescriptions. Older people (> 65 years) had more skin- and soft tissue infectio
Cells continuously export, import, and recycle molecules over the plasma membrane. Internalization, i.e. cellular import of extracellular material, is a fundamental process, which provides cells with nutrients and enables the immune cells of higher organisms to remove debris, sample their surroundings for antigens and to fight microbes. Moreover, internalization regulates complex cellular signalli
A comprehensive statistical model is described for ultrawideband (UWB) propagation channels that is valid for a frequency range from 3-10 GHz. It is based on measurements and simulations in the following environments: residential indoor, office indoor, builtup outdoor, industrial indoor, farm environments, and body area networks. The model is independent of the used antennas. It includes the frequ
The present doctoral thesis is a study of the problem of "variation" in relation to word-stress in Russian adjectives, in both their short and long forms. The stress variation in adjectival forms is investigated from various viewpoints, the main of which is the revelation of the basic processes of stress reorganisation in these groups of words and the establishment of main tendencies of adjectival
The estimated degree of carotid stenosis is decisive for the selection of patients who would benefit from surgical treatment. Carotid thrombendarterectomy is recommended in patients with symptomatic > or = 80 procent internal carotid artery stenosis (ECST method). Many vascular centers now often rely entirely on duplex ultrasonography to select the patients for carotid surgery. The results of a re
PURPOSE: To describe the response from multifocal electroretinography in branch retinal vein occlusion. DESIGN: Prospective observational case control series. METHODS: Multifocal electroretinography was recorded in 15 patients with temporal branch retinal vein occlusion and 21 control subjects using a visual evoked response imaging system. RESULTS: There were significant differences in mean amplit
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
