Search for dissertations about: "thesis in agricultural engineering"

Showing result 1 - 5 of 225 swedish dissertations containing the words thesis in agricultural engineering.

  1. 1. Model-Based Stem Volume Retrieval and Windthrow Detection using CARABAS and P-band SAR

    University dissertation from Chalmers University of Technology

    Author : Klas Folkesson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Övrig geovetenskap; Other earth sciences; Skogsuppskattning och skogsindelning; Forest mensuration; Fjärranalys; Remote sensing; Skogsteknik; Forest engineering; Övrig elektroteknik; elektronik och fotonik; Other electrical engineering; electronics and photonics; Miljöteknik; Environmental engineering; remote sensing; synthetic aperture radar SAR ; CARABAS; P-band; image segmentation; forest monitoring; model-based stem volume retrieval; windthrow detection;

    Abstract : Radar remote sensing is an efficient method for monitoring forests over large areas. Radar waves transmitted from a system carried by a satellite or an aircraft interact with trees on the ground, and the reflected waves are used to form images which are independent of weather and light conditions. READ MORE

  2. 2. Estimation of Forest Biomass and Faraday Rotation Using Polarimetric L-/P-band SAR

    University dissertation from Chalmers University of Technology

    Author : Gustaf Sandberg; Chalmers tekniska högskola.; Chalmers University of Technology.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Skogsuppskattning och skogsindelning; Forest mensuration; Fjärranalys; Remote sensing; Miljöteknik; Environmental engineering; Rymdteknik; Space engineering; Remote sensing; synthetic aperture radar SAR ; calibration; forest biomass retrieval; linear regression; P-band; L-band;

    Abstract : At present the greatest source of uncertainty in the global carbon cycle is in the terrestrial ecosystems. In order to reduce these uncertainties it is necessary to provide consistent and accurate global estimates of the biomass contained in the forests of the world. READ MORE

  3. 3. Numerical analysis of Moisture-Related Distortions in Sawn Timber

    University dissertation from Chalmers University of Technology

    Author : Sigurdur Ormarsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [1999]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Byggteknik; Civil engineering; Computer simulations; Deformation; Wood; Moisture; Drying; Finite element method; Samhällsbyggnadsteknik och arkitektur; Civil engineering and architecture; Teknisk mekanik; Engineering mechanics; simulation; deformation; wood; moisture; finite element method;

    Abstract : A 3D theory for the numerical simulation of deformations and stresses in wood during moisture variation is described. The constitutive model employed assumes the total strain rate to be the sum of the elastic strain rate, the moisture-induced strain rate, the mechano-sorption strain rate and the creep strain rate. READ MORE

  4. 4. Metal Speciation and Toxicity in Sewage Sludge

    University dissertation from Chalmers University of Technology

    Author : Annika Ekvall; Chalmers tekniska högskola.; Chalmers University of Technology.; [1995]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Samhällsbyggnadsteknik och arkitektur; Civil engineering and architecture; Miljöteknik; Environmental engineering; sewage sludge; metals; toxicity; speciation; fractionation; partition coefficient;

    Abstract : Increasingly stringent controls on metal concentrations in sewage sludge destined for agricultural application provided a basis for the study of the relevance of metal speciation in sewage sludge. A comprehensive literature review identified difficulties in relating metal speciation through single chemical extractions to plant uptake and soil toxicity. READ MORE

  5. 5. Bed filters for phosphorus removal in on-site wastewater treatment Removal mechanisms and sustainability

    University dissertation from Stockholm : KTH Royal Institute of Technology (KTH)

    Author : David Eveborn; KTH.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; On-site wastewater treatment; Eutrophication; Environmental impact assessment; Phosphorus removal mechanisms; Soil infiltration; Reactive bed filters; TECHNOLOGY Other technology Environmental engineering; TEKNIKVETENSKAP Övriga teknikvetenskaper Miljöteknik; TECHNOLOGY Civil engineering and architecture Water engineering; TEKNIKVETENSKAP Samhällsbyggnadsteknik och arkitektur Vattenteknik; FORESTRY; AGRICULTURAL SCIENCES and LANDSCAPE PLANNING Soil science Soil chemistry; SKOGS- och JORDBRUKSVETENSKAP samt LANDSKAPSPLANERING Markvetenskap Markkemi;

    Abstract : For many surface waters, phosphorus (P) leaching is a serious problem that should be minimized to prevent eutrophication. In Sweden there is a demand for physical and technical development of high-performance P removal techniques to reduce phosphorus leaching from on-site wastewater treatment systems to the Baltic Sea. READ MORE