Martin Strand

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 The seasonal variation in maximum photochemical efficiency of photosystem II (Fv/Fm) and the relationship between Fv/Fm and climatic factors such as irradiance, frost-nights and daily mean temperature was studied in young Norway spruce trees for 4 years in northern Sweden. As a result of night frost, the Fv/Fm-ratio gradually decreased during the autumn.(More)
Seasonal courses of light-saturated rate of net photosynthesis (A360) and stomatal conductance (gs) were examined in detached 1-year-old needles of Scots pine (Pinus sylvestris L.) from early April to mid-November. To evaluate the effects of soil frost and low soil temperatures on gas exchange, the extent and duration of soil frost, as well as the onset of(More)
One of the main barriers to automating a particular task with a robot is the amount of time needed to program the robot. Decreasing the programming time would facilitate automation in domains previously off limits. In this paper, we present a novel method for leveraging the previous work of a user to decrease future programming time: predictive robot(More)
Inhibition of photosynthesis was followed during autumn and early winter in current-year sun and shade needles of unfertilized and fertilized Norway spruce [Picea abies (L.) Karst.] by simultaneous measurements of photosynthetic O2 evolution and chlorophyll a fluorescence at 20 °C. The CO2-saturated rate of O2 evolution was generally higher in sun needles(More)
Wireless sensor networks consist of many small embedded devices that are equipped with sensors and a wireless communication unit. These devices, or sensor nodes, are typically low cost, resource constrained and batterypowered. Sensor network applications include environmental monitoring, industrial condition monitoring, building surveillance, and(More)
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