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According to the principle of least action, the spatially periodic motions of one-dimensional mechanical systems with no external forces are described in the Lagrangian formalism by geodesics on a manifold-configuration space, the group D of smooth orientation-preserving diffeomorphisms of the circle. The periodic inviscid Burgers equation is the geodesic equation on D with the L-2 right-invariant
In 1995 and 1996 a Swedish feed mill had problems due to a persistent contamination of Salmonella enterica spp. enterica serovar Senftenberg that was difficult to eliminate. Forty-eight strains isolated from the feed mill, together with unrelated strains included to evaluate the discriminatory power and reproducibility, were analysed by pulsed-field gel electrophoresis (PFGE). The source of contam
Abstract in Chinese Abstract is not available
Erik Acharius, Linnaeus last pupil and accounted as "The father of lichenology", was born 250 years ago, on the 10th of October 1757. After graduating in Uppsala and taking his medical degree in Lund, he eventually settled in Vadstena, where he worked as a provincial doctor and chief physician at the hospital for veneral diseases. At the age of 36 he wrote his first lichenological work and then co
The therapeutic potential of glial cell line-derived neurotrophic factor ( GDNF) for Parkinson's disease is likely to depend on sustained delivery of the appropriate amount to the target areas. Recombinant adeno-associated viral vectors ( rAAVs) expressing GDNF may be a suitable delivery system for this purpose. The aim of this study was to define a sustained level of GDNF that does not affect the
OBJECTIVE: The purpose of this study was to compare the usefulness of the Nottingham Health Profile (NHP) and the Short-Form 36 Health Survey (SF-36) as general outcome measures after vascular intervention for lower limb ischemia with respect to patients' quality of life, on the basis of validity, reliability, and responsiveness analyses. Patients and Methods: Eighty patients, 40 with claudication
In the process of constructing a confidence region induced by the Wilcoxon two-sample test ties always appear. We show that, for various ways of handling ties, the confidence region will be an interval.
This paper describes a development process concerning the active involvement of staff of different professions in developing and implementing methods for assessment of activities of daily living (ADL) in home-based geriatric rehabilitation. Although a variety of established ADL instruments exist, at the time for this study no I-ADL (Instrumental Activities of Daily Living) instrument suitable for
The objective of this study was the investigation of the maximal potential donor pool and causes of non-realized organ donation. On-site retrospective medical-record review was performed for all cases of patient death (n=1608) occurring in 1999 at 34 (83% of all) intensive care units (ICUs) in the region of the transplant center in Prague, Czech Republic. Two hundred and eighty-eight (18%) patient
This thesis concerns the usage of large pollen databases and their application to mapping and modelling past vegetation. Maps of past taxon distributions are generated and classification techniques are used to compile maps of past woodland types. These visualisations of pollen data have applications in forest ecology and in modelling the impacts of climate change. Maps of the distribution limits o
