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Nocturnal bees, wasps and ants have considerably larger ocelli than their diurnal relatives, suggesting an active role in vision at night. In a first step to understanding what this role might be, the morphology and physiological optics of ocelli were investigated in three tropical rainforest species – the nocturnal sweat bee Megalopta genalis, the nocturnal paper wasp Apoica pallens and the diurn
In this study, a dilute mixture of volatile organic compounds in aqueous solution was separated by means of hydrophobic pervaporation, using three different poly(octylmethyl siloxane) membranes of various thicknesses. The permeabilities were determined for homologous series of compounds from the chemical groups of alcohols, esters, and aldehydes, and they were then related to some characteristic p
Purpose. To determine the potential application of high-intensity focused ultrasound for the minimally invasive treatment of herniated intervertebral discs by developing a probe that produces sufficiently high temperature locally to shrink collagen fibers (65-75 degrees C). Materials and Methods. A 5-mm ultrasound probe was produced with a geometric focal length of 15 mm. The probe produced 2.5 W
Aims: To describe environmental and personal tick-preventive measures and their predictors, taken by a population living in a highly tick-endemic area. Methods: Owing to the recent confirmation of human tick-borne encephalitis cases, vaccination against tick-borne encephalitis was offered to the population living in the endemic area through the use of leaflets and media campaigns. At the time of t
Aim: To identify maternal prenatal and postnatal smoking as risk factors for psychosocial behaviour problems in Swedish preschool children. Methods: This prospective, longitudinal population study compared mothers' self-reported smoking during pregnancy and when the child was 3 mo old with behaviour problems according to Achenbach's Child Behavior Checklist at 3 y ( 1428 children) and 5.5 y of age
Aims and objectives. This study aimed at investigating life satisfaction and its relation to living conditions, overall health, self-care capacity, feeling lonely, physical activities and financial resources among people (65+) with reduced self-care capacity. Background. Knowledge about factors related to low life satisfaction among older people with reduced self-care capacity is sparse, although
Popular Abstract in Swedish En experimentell och teoretisk studie kring bränder i varulager i både modell och verklig skala har genomförts. Teoretiska modeller för att beräkna flamhöjder, gas temperaturer, gas hastigheter och värmeflöde inuti spalterna mellan de lagrade varorna presenteras. Modellerna kan t ex användas för att beräkna tid till utlösning av olika sprinklers som används för att skydA theoretical and experimental study of rack storage fires and responsiveness of sprinklers is presented. Free-burn tests with non-combustible and combustible material were carried out in reduced scale with verification in large scale. Formulas for in-rack flame height, excess gas temperature, gas velocity and heat flux to storage walls are provided. The formulas include overall heat release rate,
In dilute astrophysical plasmas, such as planetary nebulae and H II regions, strong lines appear that only have weak, if any, correspondence to the spectrum of laboratory light sources. Some of these are parity forbidden lines, i.e. emission from long-lived metastable states that cannot decay via normal electric dipole (E1) routes but only via the slower M1 and E2 transitions. The long lifetime of
Statistical inference for extremes has been a subject of intensive research over the past couple of decades. One approach is based on modelling exceedances of a random variable over a high threshold with the generalized Pareto (GP) distribution. This has proved to be an important way to apply extreme value theory in practice and is widely used. We introduce a multivariate analogue of the GP distri
Background: Antipericyte autoantibodies (APAAs) are present in high frequency among diabetic subjects with and without nonproliferative retinopathy. This study aimed to determine whether progression of retinopathy in type 2 diabetes was associated with the same medical risk factors in APAA-positive subjects as in APAA-negative subjects. Methods: Type 2 diabetic patients with nonproliferative diabe
The way relationships between symbols and thoughts are created is a general problem in learning, mainly described as "how students' learn to mean". This general problem raises some basic questions concerning how students' relate understanding to words used in learning. The present research provides an alternative perspective on the relationship between thought and language derived from the phenome
