2 resultados para Jämförelse

em Academic Archive On-line (Karlstad University


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Levelling and trigonometric height measurements are the methods that are mostly used today for height determination, as the standard error with these methods is in the magnitude of millimeters, as long as the view length is less than 50 m. When creating a new construction map the requirement on standard error differ from 1 (Fredriksson, 2011) to 10 cm (www.arvidsjaur.se) depending on which municipality it concerns. When using network RTK for measuring, the accuracy in height can fall below 3 cm when the conditions are optimal. The purpose of this paper is to investigate if network RTK can be used as an alternative to determinate height when accuracy under 10 cm is requested. Five points at locations with different conditions for accuracy got their height determined with the three methods mentioned above. Positional accuracy was formed for each point and method. The result from levelling was used as reference for the calculations. To compare the result with the requirements extended standard uncertainty, 2covering 95 %, was used. The result from trigonometric height measurement shows a position accuracy of 4 mm. From the network RTK, the points that were positioned without interference got a positional accuracy of 3.3 to 5.5 cm, while the points that were influenced by their environment, multipath interference and obstructions, got a positional accuracy of 123.3 cm and 234.4 cm. Positional accuracy of this method became 127.4 cm. The result from the height determination with network RTK shows big difference in accuracy for the different points. The conclusion is that network RTK measurement would not be a sufficiently accurate height determination method for preparation of a new construction map in an area similar to the one used for this test. Conversely, a construction map drawn up in an open area free from interference obstacles the results show that the network RTK is an approved method for determining height, depending on the requirements of the municipality.

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Syftet med studien var att jämföra grad av coping samt grad av livstillfredsställelse mellan religiösa personer och de som anser sig vara icke troende. För att testa skillnaderna mellan religiösa och ateister gjordes stickprov med data från 30 religiösa och 103 ateister. Mätinstrumentet REI skapades för att mäta graden av tro eller icke tro i avseende att jämföra resultatet mot den trosuppfattning som deltagarna själva hade angivit. Ett Mann–Whitney U test visade att det inte fanns en signifikant skillnad mellan deltagarnas självskattning av tro och resultatet från REI. Resultat från oberoende t-test avseende livstillfredsställelse visar att religiösa och ateister inte signifikant skilde sig åt. Signfikanta skillnader återfanns i oberoende t-test avseende emotionsbaserad, problemfokuserad och dysfunktionell coping. De religiösa och ateistiska grupperna skiljde sig mest i emotionsbaserad coping som hade högst effektstyrka enligt Cohens d (d = 1,39) i jämförelse med effektstyrkan för problemfokuserad och dysfunktionell coping.