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Popular Abstract in Swedish Denna studie fokuserar på reproduktionskostnader och de energetiska taktiker som en reproducerande individ kan utnyttja för att tillfredsställa det ökade behovet av energi och näring under reproduktionen. Reproduktionskostnader har traditionellt definierats som reduktioner av den framtida potentiella produktionen av avkomma, orsakade av en nuvarande reproduktiv investerThis study focuses on various aspects of costs of reproduction and the evolution of energetic breeding tactics. It emphasizes the distinction between demographic costs of reproduction expressed already before current offspring have reached independence (prebreeding costs), and costs expressed only after offspring independence (postbreeding costs). Prebreeding costs have only rarely been appreciate

A novel method for learning characteristic decision trees is applied to the problem of learning the decision mechanism of coin-sorting machines. Decision trees constructed by ID3-like algorithms are unable to detect instances of categories not present in the set of training examples. Instead of being rejected, such instances are assigned to one of the classes actually present in the training set.

Popular Abstract in Swedish Diabetes mellitus är en kronisk sjukdom som orsakas av en oförmåga att bilda och/eller känna av insulinets effekt i vävnaderna, vilket leder till förhöjda blodsockervärden. Diabetes som debuterar i unga år och där insulinproduktionen oftast är upphävd klassas som typ 1 diabetes. Typ 2 diabetes debuterar senare i livet och här finns olika grader av insulinproduktion kvarDiabetic retinopathy is a common complication to diabetes mellitus and is still a major cause of impaired vision in the Western world. The aim of the present study was to identify medical risk factors influencing the development and progression of retinopathy in type 1 diabetic patients, and to investigate the effects of laser treatment on visual acuity and glare. Although the development of sigh

It is expected that, in the future, gas turbines will be operated on gaseous fuels currently unutilized. The ability to predict the range of feasible fuels, and the extent to which existing turbines must be modified to accommodate these fuels, rests on the nature of these fuels in the combustion environment. Understanding the combustion behavior is aided by investigation of syngases of similar com

This paper presents an evaluation of single input single output (SISO), single input multiple output (SIMO) and multiple input multiple output (MIMO) channel capacities for a dual antenna prototype in proximity of a user. The dual antenna prototype mimics today’s small mobile phone design in size and in comprising internal, compact, multi-band antennas. Four different user cases are evaluated by m

1990-91 drogs nya gränser i Europa. Inte bara kartan ritades om. Också historien har förändrats när 1900-talets avgörande händelser, andra världskriget, förintelsen och kommunistterrorn, tagits i bruk för att skapa ett nytt Europa. Det är visserligen en process som pågått under hela efterkrigstiden, i den tyska skuldbearbetningen, debatten om det totalitära samhället, det ökade intresset för förin

Popular Abstract in Swedish I avhandlingen presenteras delar till radiomottagare med extremt låg effektförbrukning. Detta behövs då dagens samhälle blir allt mer och mer uppkopplat, och detta gäller inte bara persondatorer och mobiltelefoner. Med den snabba teknikutvecklingen inom radiokommunikation, driven av små och smarta mobiltelefoner, går det nu även att få prylar av alla de slag att tala meHistorically, research on radio communication has focused on improving range and data rate. In the last decade, however, there has been an increasing demand for low power and low cost radios that can provide connectivity with small devices around us. They should be able to offer basic connectivity with a power consumption low enough to function extended periods of time on a single battery charge,

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The acoustic field generated by two coaxial jets is studied numerically. The turbulent non-isothermal flow is handled by Large Eddy Simulations (LES) and the acoustical perturbations are treated by solving an inhomogeneous wave equation. The acoustical source is obtained from the instantaneous LES flow field. The computed flow and acoustical fields are compared to measured data. Good agreement bet