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We present a new, fast algorithm for rendering physically-based soft shadows in ray tracing-based renderers. Our method replaces the hundreds of shadow rays commonly used in stochastic ray tracers with a single shadow ray and a local reconstruction of the visibility function. Compared to tracing the shadow rays, our algorithm produces exactly the same image while executing one to two orders of mag
Popular Abstract in Swedish Stroke (slaganfall) orsakas av en propp i hjärnan eller av en hjärnblödning, som hindrar blodflödet till hjärnan. Eftersom hjärnan är beroende av konstant tillförsel av syre och glykos från blodet för sin funktion, leder en blockering av blodflödet till hjärnskador. Stroke är den tredje vanligaste dödsorsaken i västvärlden och den vanligatse orsaken till handikapp hos vStroke is caused by an obstruction of blood flow to a part of the brain, resulting in brain damage. Stroke is the third most common cause of death in the industrialized world, and the primary cause of adult-onset disability. There is a spontaneous recovery of function after stroke but several factors, such as the environment can influence the speed and extent of this recovery. This thesis deals wi
The article deals with how the Armenian genocide, perpetrated by the Young Turkish regime in the Ottoman Empire during the First World War, has been handled by Armenians, Turks and the international community from its pertetration to the present.
BACKGROUND: Knowledge on the reinnervation of transplanted organs is scarce, and the aim of the study was therefore to evaluate to what degree syngeneic pancreas grafts were reinnervated in rats. METHODS: Syngeneic pancreatico-duodenal transplantations were performed in normoglycemic Wistar-Furth rats. Native and transplanted pancreas and duodenum were removed 4 or 40 weeks after implantation, and
This study investigated whether there is an association between bone density and features of the metabolic syndrome in relation to hormonal status. All women aged 50 to 59 years living in a defined geographic area in Sweden were offered a health assessment program including blood glucose, lipid profile, blood pressure, and bone densitometry. Women were divided into 3 groups according to their horm
Popular Abstract in Swedish Fuktbuffring i inomhusmiljön är ytmaterialens förmåga att, genom absorption och desorption, dämpa luftens fuktighetsvariationer. Fuktbuffring spelar en viktig roll i förståelsen av risker för biologisk tillväxt i ytmaterial, t.ex. mögel på väggar och husdammskvalster i sängar. Därigenom är fuktbuffring viktig ur hälsosynpunkt. Förutom hälsoaspekterna är kunskap om fuktbMoisture buffering in the indoor environment is the ability, through absorption and desorption, of surface materials to attenuate the moisture variations of the indoor air. Moisture buffering plays an important role in understanding the risks for biological growth in surface materials in the indoor environment, e.g., mold growth on walls and house dust mites in beds, and thereby also have an impac
Artikel om hur språkvetaren Jan Svensson och filosofen Per Bauhn granskar
A method was developed for the determination of human hemoglobin (Hb) adducts from hexahydrophthalic anhydride (HHPA) and methylhexahydrophthalic anhydride (MHHPA). The procedure includes lysis of erythrocytes, dialysis of the Hb-solution followed by acid hydrolysis. The released hexahydrophthalic (HHP) acid and methylhexahydrophthalic (MHHP) acid were purified using a combined liquid-liquid and s
In northern Sweden, plants growing in association with the clonal dwarf shrub Empetrum hermaphroditum usually exhibit limited growth and are N-depleted. Previous studies suggest that this negative effect by E. hermaphroditum may be explained, at least in part, by the release of phenolic compounds, particularly the dihydrostilbene, batatasin-III from foliage to soil. In the present work, we investi
An investigation of Thapsia garganica afforded a series of tetracyclic C-19 dilactones, whose production was dependent on the time and location of the collection. These unusual tetrahomosesquiterpenoids are presumably biosynthesized via a carbon dioxide-triggered electrophilic polyolefin cyclization. Despite the structural differences with thapsigargin, these compounds showed SERCA-inhibiting prop
The effect of loss of bond for longitudinal reinforcement on the structural behavior of RC beams is investigated in a test series of six beams where nominal length without bond is varied. Loss of bond is created with plastic tubes surrounding the longitudinal reinforcement leaving short bonded lengths over support and at positions where stirrups are crossing the longitudinal reinforcement. Using a
