Filtyp
Large volumes of wastewater with dissolved wood components are treated in wastewater treatment plants at thermomechanical pulp mills. It has been shown previously that hemicelluloses in these wastewater streams can be recovered by membrane filtration. A serious obstacle when treating lignocellulose process streams is fouling of the membranes. Fouling not only increases operating costs but also red
Modelling solute transport in the unsaturated zone is a complex problem given the inherent soil heterogeneity. Using time domain reflectometry (TDR) as described in this paper can improve data quality to be used in predictive models. The TDR technique requires appropriate calibration if it is to be used for solute concentration measurements under constant and varying water content. Two ways of det
During recent years, time domain reflectometry (TDR) has proved to be a valuable tool for both water content (theta) and bulk electrical conductivity (sigma (a)) measurements. To allow resident solute concentration (C-r) measurements, a calibration procedure is necessary for the relationship between sigma (a) and C-r. Two main calibration approaches exist. Direct calibration allows for C-r measure
Family caregivers are believed to be the primary source of support for HIV-affected children. There is limited evidence about practices of support for caregivers, to strengthen them and to enhance the welfare of HIV positive children, especially in African settings. Our aim was therefore to illuminate caregivers’ lived experiences of caring for a child in Ethiopia 2 years after the child was enrol
We present experimental data from vertical InAs/InGaAsSb/GaSb nanowire tunnel field-effect transistors with channel diameter scaled down to 10 nm and ability to reach a point subthreshold swing of 35 mV/decade at VDS = 0.05 V. Furthermore, the impact of drain, channel and source diameter scaling on the subthreshold swing and currents are studied. Impact of gate-overlap is more evident
In this paper, we introduce a wideband dictionary framework for estimating sparse signals. By formulating integrated dictionary elements spanning bands of the considered parameter space, one may efficiently find and discard large parts of the parameter space not active in the signal. After each iteration, the zero-valued parts of the dictionary may be discarded to allow a refined dictionary to be
Mobile phone use and its potential addiction has become a point of interest within the research community. The aim of the study was to translate and validate the Test of Mobile Dependence (TMD), and to investigate if there are any associations between mobile phone use and problem gambling. This was a cross-sectional study on a Swedish general population. A questionnaire consisting of a translated
In many studies, data from transient or quasi steady-state solute transport experiments are modeled using steady-state models. Few investigations, however, have been carried out to verify the validity of this approach. In this paper, we study the effects of water application frequency on the parameters derived using steady-state models. Bromide transport was studied in an undisturbed soil column o
Pollutant transport in the unsaturated soil zone is a potential threat to surface and ground water resources. The intensity and volume of rainfall are the parameters that decide how fast and deep the pollutants will be transported. Climate models predict a future rainfall climate with higher total volume and higher intensities. In the present study we try to assess effects on unsaturated solute tr
Aims:Repolarization indices of ECG have been widely assessed as predictors of ventricular arrhythmias. However, little is known of the dynamic changes of these parameters during continuous monitoring in acute ischaemic episodes. The objective of the study was to evaluate repolarization-related predictors of ventricular fibrillation (VF) during progression of experimental myocardial infarction. Met
Paleomagnetic records obtained from lake sediments provide important constraints on geomagnetic field behavior. Secular variation recorded in sediments is used in global geomagnetic field models, particularly over longer timescales when archeomagnetic data are sparse. In addition, by matching distinctive secular variation features, lake sediment paleomagnetic records have proven useful for dating
This study contains a series of laboratory experiments designed to describe the lateral movement and spatial variability of an infiltrated dye tracer across the capillary fringe of homogenous sand in an aquarium. A combination of image analysis and geoelectrical monitoring was used to track the flow paths of the dye with different hydraulic gradients and infiltration rates. Photographs were taken
Numerical weather prediction models are increasing in resolution and becoming capable of explicitly representing individual convective storms, but we do not yet know if it is the improved resolution that is leading to better forecasts.
Clayey and saline soils have been shown to be problematic for time domain reflectometry (TDR) measurements. This study presents some of these problems and discusses solutions to them. Thirteen solute transport experiments were carried out in three undisturbed soil columns of swelling clay soil from Tunisia, labelled S1, S2, and S3 respectively. The columns were collected at three different physiog
