The theory and applications of chaotic oscillators in electronic commuication are investigated. A method of random number generation utilising a chaotic double scroll oscillator is proposed and evaluated. The theoretical limits of the randomness of the method is analysed.

OBJECTIVE: This study analyses the correlation between the Swedish underprivileged area score and sales of tranquillizers, hypnotics/sedatives, neuroleptics and antidepressants, and the correlation between these sales and mortality and suicide rates, with the aim of using sales data to identify areas with poor socioeconomic conditions. SETTING: Southern Sweden, 33 municipalities in Skane, 1987 and

Drying is an important process in paper manufacturing, where steam heated cylinders are used to dry paper. Control of the moisture content is accomplished by adjusting the steam pressure in the cylinders. In previous work it has been shown that the dynamics from steam flow to steam pressure in the cylinder can be described by a linear second order black box model. This paper presents a first princ

The present study focuses on the preparation of poly(ethylene oxide) (PEO) nanocomposites based on the synthetic Laponite clay. The clay was added both in its pure form as well as organically modified with low molar mass poly(ethylene glycol) (PEG) components in order to enhance the compatibility between Laponite and PEO. Several PEG's with different end groups were used. Almost all of them were f

Deep-inelastic scattering data in the range 150 < Q(2) < 35000 GeV2 are used to investigate the minimum jet separation necessary to allow accurate description of the rate of dijet production using next-to-leading order perturbative QCD calculations. The required jet separation is found to be small, allowing about 1/3 of DIS data to be classified as dijet, as opposed to approximately 1/10 with more

The light response of a BGO crystal has been measured for particles Z = 1-8, A = 1-16 in the energy range similar to2-60 A MeV. The reaction products are identified by a DeltaE(Si) - E(Sci/PD) telescope, The position of the jump in the value of the signal from the PD at the punch-through points is used to calibrate both the DeltaE(Si) and E(Sci/PD) scales in MeV. The dependence of the light output

Vertebroplastik och kyfoplastik är två nya behandlingsmetoder vid osteoporotiska kotkompressioner, där man genom en perkutant insatt kanyl fyller den skadade kotkroppen med bencement så att frakturen stabiliseras, ryggsmärtan reduceras och patientmobiliseringen underlättas. Det finns inga prospektiva, randomiserade, kontrollerade studier publicerade som värderar effekterna av vertebro- och kyfoplaDuring the last 15 years, two new treatment strategies have gained worldwide attention in the treatment of osteoporotic vertebral fractures. The exponential increase in the use of percutaneous vertebro- or kyphoplasty has up to now not been supported by scientific sound evidence-based data. There exist no prospective randomised controlled trials (RCT) that support the efficacy of the treatments, n

On the late production of the Swedish artist Elis Eriksson, with a special focus on his books.

We consider design of coordinating controllers for a fleet of underactuated ships. Each ship is modeled as a mechanical system with 3 degrees of freedom and 2 control inputs, which are the propeller thrust and the angle of the rudder; presence of lumped environmental forces is assumed. The proposed motion planning procedure relies. on properties of an auxiliary explicitly constructed second order

The influence of the latex surface chemistry on the association of latices with different cellulose derivatives has been investigated by means of isothermal calorimetry and electrophoresis. The chemistries of three grades of coating latices differed with regard to the type and amount of vinylic monomer and the level of carboxylation. In addition, a styrene/butadiene latex substantially free from s

During time of fast development of computer and sensor technology, ground data sampling strategies have achieved diminished attention in many remote sensing studies. This paper discusses the importance of designing an appropriate sampling scheme of ground data collection for remote sensing applications. The difficulties of achieving a balance between the size and the error of the samples are ident

Popular Abstract in Swedish Graviditetsdiabetes (GDM) definieras som nedsatt glukostolerans av varierande svårighets¬grad som upptäcks under graviditet och som oftast försvinner efter förlossning. GDM innebär ökad risk för såväl moder som barn. Kvinnor med GDM föder ofta stora barn och har ökad risk för komplikationer i samband med förlossningen. GDM-prevalensen varierar avsevärt mellan olika popuGestational diabetes mellitus (GDM) is a heterogeneous disorder that is defined as carbohydrate intolerance with onset or first recognition during pregnancy. Impaired beta-cell function and insulin resistance are the hallmarks of GDM. The overall aim of this thesis was to study the genetic and immunological risk factors that increase susceptibility to GDM. First, we investigated whether autoimmuni

This paper presents a collection of experiences related to success factors in graduate and postgraduate education. The experiences are mainly concerned with how to make the education relevant from an industrial viewpoint. This is emphasized as a key issue in software engineering education and research, as the main objective is to give the students a good basis for large-scale software development

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The hoverfly Criorhina ranunculi – a biodiversity indicator at the landscape level? The hoverfly Criorhina ranunculi is rare and red-listed in Sweden, but it may be overlooked. I made a detailed inventory of the species in the parish of Stenbrohult, southern Sweden, where the species was found at nine localities in 2006, at one of these with at least ten individuals. The study area, with many othe