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Effekter på mossammansättning vid avverkningar i tallskog i södra Sverige Andelen skyddad skog är idag låg och för att ta reda på hur arter och mångfald kan bevaras måste produktionsskog studeras. Bottenskiktet i form av t.ex. mossor har stor betydelse för förekomst av andra artgrupper och även kommersiellt vid skogsföryngring. Sedan tidigare finns studier på långtidseffekter av kalavverkning me

We introduce lower-bound certificates for classical planning tasks, which can be used to prove the unsolvability of a task or the optimality of a plan in a way that can be verified by an independent third party. We describe a general framework for generating lower-bound certificates based on pseudo-Boolean constraints, which is agnostic to the planning algorithm used. As a case study, we show how

Motivation and identity have been vastly investigated within second language acquisition (SLA). These issues are restrained by their complex and dynamic natures, which indicate that they are far from easy to research. The purpose of this essay was to continue traditional areas of research in order to add to empirical knowledge. The attempt was to show that systematic research is necessary in order

Evaluating the subground properties during the initial stage of a construction of building is important in order to estimate the suitability of soil quality to the technical requirements of bearing capacity, resistance to stress, and strength. This study presented the evaluation of the geotechnical properties of soil intended for the construction of Max IV facility of Lund University, performed in

To help meet emission standards, hydrogen sulfide (H2S) from geothermal production may be injected back into the subsurface, where basalt offers, in theory, the capacity to mineralize H2S into pyrite. Ensuring the viability of this pollution mitigation technology requires information on how much H2S is mineralized, at what rate and where. To date, monitoring efforts of field-scale H2S reinjection

Stora flygningar av små fåglar: Dubbelbeckasinen når höga höjder – flera gånger om Flyttfåglar har länge fascinerat människan. Under lång tid visste vi väldigt lite om var fåglarna tog vägen på vintern, och än mindre hur dessa flygningar faktiskt genomfördes. Under det senaste årtiondet har utvecklingen av små mätapparater (”loggar”) gjort att vi nu vet betydligt mycket mer om vart fåglarna tar vTracking birds throughout their migratory flights have reached new heights during the last decades, as new technology has made it possible to track birds during with higher accuracy than ever before. In this study, I have used accelerometer and air pressure data to mainly address the questions of altitude selection and changes during long distance non-stop migration in the Great Snipe (Gallinago m

It is important to measure the relative humidity, RH, level in a concrete slab before applying semi permeable flooring to the surface. If the moisture level in the concrete is too high when the flooring is applied the high alkali level in combination with the moisture will degrade the adhesive. This paper describes a new system used to continuously measure and monitor RH in situ during the constru