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We study the effects of preschool attendance on children's schooling and cognitive skills in Kenya and Tanzania. We use a within-household estimator and data from nationally representative surveys of school-age children's literacy and numeracy skills, which include retrospective information on preschool attendance. In both countries, school entry rules are not strictly enforced, and children who a

The nanowires technology has proved itself to be fairly promising in order to develop more ecient optoelectronic devices such as solar cells and LEDs. It becomes therefore interesting to be able to characterize nanowires samples with a high precision, so that the light emitted from each single nanowire can be detected and analyzed. The purpose of this thesis project was to test if solid immersion

The fatigue behavior of laminated veneer lumber (Douglas-fir) subjected to shearstress has been studied. The static shear strength of specimens, 37 by 102 by 406 mm was established through a three point bending test over a span of 305 mm. Four series of specimens were subjected to a cyclic load history with peak loads ranging from 95 to 80 percent of the static strength. The duration of each load

Is it possible to predict the future returns for the crude oil index by looking at the activity on Twitter? It is not possible to predict the market according to the efficient market hypothesis but earlier research on the topic states that it is possible for Twitter to predict the markets. This paper examines this phenomenon further by investigating the relationship between the market and Twitter

This thesis takes the process of privatization as its starting point, a process which in Sweden started 20-30 years ago and is still ongoing. Since this process is very likely to be irreversible an open and rational discussion is of particular importance. Hence, one of the aims of this thesis is to problematize the privatization debate. This leads to the primary objective: to take a normative stan

Smoke spread via ventilation systems relying on running fans or bypasses can be calculated with performance based fire safety analyses tools. The focus of this thesis work was to review existing methods for treating this problem and to further develop current analysis methods. Suggestions are also made for setting up guidelines as to what are tolerable amounts of smoke spread depending on building

This report describes experiments with a method for measuring water density in the spray from a water mist sprinkler using laser diodes. The decrease in light intensity at a photo cell across the spray from the diode is used to calculate the water density. The same method has previously been used for measuring the soot content of a flame, but the calculations when measuring water density are in so

In June 2009 A.D. the Government Offices of Sweden presented an investigation about conscription as the recruitment system to Swedish Armed Forces. Behind the investigation stood a parliamentary committe with the specific mission to investigate how the recruitment should be organised in the future. The committee suggest to abolish conscription and adopt voluntary recruitment. Two members of the co

This essay discusses the issue of government formation and answers the question why does Finland form surplus governments? The research has been based on the notion that every government-formature should strive to form a minimal-winning government which iscontrasted by the fact that Finland has an unusual tradition of forming surplus governments. The issue in question is considered within the time

Heavy trucks are commonly powered by combustion engines running on diesel. Since these trucks often run on highways they rarely have to perform cold starts. Diesel engines take care of their NOx emissions through a process which uses the high temperatures of the exhaust gases together with urea, sprayed upon a mixer placed inside the exhaust pipes, to chemically react with the NOx over an SCR cata