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We compare a vector finite-difference method that correctly applies the boundary conditions at both horizontal and vertical dielectric interfaces (but not at corners or slanted interfaces) to algorithms that only approximately satisfy these boundary conditions. We find, rather unexpectedly, that for strongly guiding waveguides the boundary conditions imposed at the refractive- index discontinuitie
Triglycerides and phospholipids 0.5-2mg (wet weight) of human liver material obtained by the fine-needle aspiration biopsy technique can be estimated after chloroform:methanol extraction by the determination of lipid phosphorus and glyceride glycerol. The methods are based on the colorimetric determination of inorganic phosphate after oxidation of the phospholipids and the enzymatic fluorometric d
We tested whether previous exposure to a toxic strain of cyanobacteria (Microcystis) affects survival, growth, and reproduction of a common herbivore, Daphnia magna. Samples from three natural populations of D. magna were each divided into two parts; one part was fed a mixture of toxic Microcystis and the non-toxic green alga Scenedesmus whereas the other part was fed only Scenedesmus. After four
Exercise during adolescence, especially during the pre-pubertal years, builds a skeleton with a high bone mineral density (BMD) and possibly a larger skeleton with a different skeletal architecture. This would lead to a stronger skeleton more resistant to trauma. These changes could be of biological significance for fracture reduction, if they were maintained into old age where fragility fractures
40 patients with transversal or short oblique fractures of the proximal shaft of the fifth metatarsal bone (Jones fracture) were treated with full weight bearing with or without elastic bandage in 39 cases and plaster cast immobilization in one. 24 cases were acute traumatic fractures, 14 stress fractures and 2 refractures. After 17 (11-26) years, 33 of the fractures had healed primarily, evidence
When the data rates of communication systems increase, wideband IF amplifiers are needed. It is also possible to use a single wideband intermediate frequency (IF) amplifier for a radio band with several narrow-band channels of varying strengths. The linearity is then critical, if intermodulation products are not to disturb weak channels. We try to find a topology for this new amplifier application
Popular Abstract in Swedish Populärvetenskaplig sammanfattning Vilka är egentligen ”de äldre”? Vad innebär det att vara pensionär? Hur ska man åldras på rätt sätt? Frågor som dessa har under det nyss avslutade århundradet ställts och besvarats på många oliks sätt, beroende av sammanhang och tidsperiod. I vissa situationer har de äldres olikhet lyfts fram, i andra deras likhet. Ibland har åldrandetThe aim of the dissertation is to describe images of old age in the magazines of Sweden’s two largest pensioner organizations, and explain the character of those images in relation to the temporal contexts of the organizations and their aim to act as the representatives of pensioners. The study is based on the 329 and 330 magazines (1941–1995) that the organizations have submitted to attract membe
In 11 healthy volunteers, the normal kinematics of the tibiofibular syndesmosis of the ankle during weight bearing and external rotation stress were compared to a nonweight-bearing neutral position by radiostereometry. We found very small rotations and displacements in this "normal" group, which indicated that the fibula is closely attached to the tibia, thereby preventing larger movements at the
Type 1 diabetes (T1D) is characterized by selective autoimmune destruction of the insulin producing beta-cells in the islets of Langerhans. When the beta-cells are destroyed exogenous administration of insulin is necessary for maintenance of glucose homeostasis. Allogeneic islet transplantation has been used as a means to circumvent the need for insulin administration and has in some cases been ab
Single-photon emission computed tomography (SPECT) is important for imaging radioactivity distributions in vivo. Quantitative SPECT is limited due to attenuation and scatter contribution. Approximations such as constant attenuation and mono-exponential scatter functions will not be valid for non-homogeneous regions. A correction method is described where non-uniform density-maps are used in the at
Aerosol number concentrations in three size ranges (d(p) > 4, d(p) > 12, 18 less than or equal to, dp less than or equal to, 135 nm) and sulfur mass from impactor samples were collected over a total of about 120 sampling hours on 18 long-range commercial flights between the northern mid-latitudes and the equatorial region covering an altitude range between 8.8 and 11.2 km. The data were evaluated
This review discusses recent observations, in health and disease, on the release and distribution of plasma-derived molecules in the airway mucosa. Briefly, the new data on airway mucosal exudation mechanisms suggest that the protein systems of plasma contribute significantly to the mucosal biology, not only in injured airways but also in such mildly inflamed airways that lack oedema and exhibit n
A Discfilter with 10 and 18 mu m filter openings, respectively, was placed in parallel to a flotation plant for separation of biological flocs from a post-denitrifying Kaldnes Moving Bed (TM) Process, the last treatment step at the municipal wastewater treatment plant at Sjolunda, Malmo, Sweden. The effluent concentrations from the 10 and 18 mu m filter were 2-5 and 2-8 mg SS L-1, respectively, wh
This conference volume is structured by the five research areas of the Lund syna-gogue project “The Ancient Synagogue: Birthplace of Two World Religions,” funded by The Bank of Sweden Tercentenary Foundations, and by its time limit up to ca 200 C.E. The aim of the conference was to give an opportunity for young, emerging scholars to interact with some of the most prominent and established scholars
