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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 10 of 11 (0.143 seconds)Spelling suggestions: "subject:"field experimentation"" "subject:"field xperimentation""
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Organic residues - a resource for arable soils /Odlare, Monica, January 2005 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniversitet, 2005. / Härtill 4 uppsatser.
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Phosphorus sorption, accumulation and leaching : effects of long-term inorganic fertilization of cultivated soils /Börling, Katarina, January 2003 (has links) (PDF)
Diss. (sammanfattning). Uppsala : Sveriges lantbruksuniv., 2003. / Härtill 4 uppsatser.
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Inverkan av hjullast och ringtryck på tryck och deformation i jordprofilen, främst i matjorden /Anselmsson, Matts Ola. January 2003 (has links) (PDF)
Examensarbete.
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Fear in horses : responses to novelty and habituation /Christensen, Janne Winther, January 2006 (has links) (PDF)
Lic.-avh. (sammanfattning) Skara : Sveriges lantbruksuniversitet, 2006. / Härtill 2 uppsatser.
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Modeling, Identification, and Control of an Unmanned Surface VehicleSonnenburg, Christian R. 16 January 2013 (has links)
This dissertation addresses the modeling, identification, and control of an automated planing vessel. To provide motion models for trajectory generation and to enable model-based control design for trajectory tracking, several experimentally identified models are compared over a wide range of speed and planing conditions for the Virginia Tech Ribcraft Unmanned Surface Vehicle. The modeling and identification objective is to determine a model which is sufficiently rich to enable effective model-based control design and trajectory optimization, sufficiently simple to allow parameter identification, and sufficiently general to describe a variety of hull forms and actuator configurations. Beginning with a 6 degree of freedom nonlinear dynamic model, several linear steering and speed models are obtained as well as a thruster model.
The Ribcraft USV tracks trajectories generated with the selected maneuvering models by using a back- stepping trajectory controller. A PD cascade trajectory control law is also developed and the performance of the two controllers is compared using aggressive trajectories. The backstepping control law compares favorably to the PD cascade controller. The backstepping control law is then further modified to account for nonlinear sternward dynamics and for a constant or slowly varying fluid flow. / Ph. D.
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On soil behaviour during field traffic /Trautner, Andreas , January 2003 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniv., 2003. / Härtill 4 uppsatser.
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A century of breeding - is genetic erosion a reality? : temporal diversity changes in Nordic and Baltic barley /Kolodinska Brantestam, Agnese, January 2005 (has links) (PDF)
Diss. (sammanfattning). Alnarp : Sveriges lantbruksuniversitet, 2005. / Härtill 4 uppsatser.
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Studies on cocoyam (Xanthosoma spp.) in Nicaragua, with emphasis on Dasheen mosaic virus /Reyes Castro, Guillermo, January 2006 (has links) (PDF)
Diss. (sammanfattning) Uppsala : Sveriges lantbruksuniversitet, 2006. / Härtill 4 uppsatser.
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The potential for using composted municipal waste in agriculture : the case of Accra, Ghana /Hofny-Collins, Anna, January 2006 (has links) (PDF)
Diss. Uppsala : Sveriges lantbruksuniv., 2006.
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Experimentalfältet : Kungl. Lantbruksakademiens experiment- och försöksverksamhet på Norra Djurgården i Stockholm 1816-1907 /Lange, Ulrich, January 1900 (has links) (PDF)
Diss. Uppsala : Sveriges lantbruksuniv., 2000. / Även utg. som: Skogs- och lantbrukshistoriska meddelanden ; 23.
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