Search for dissertations about: "Forestry"

Showing result 1 - 5 of 1064 swedish dissertations containing the word Forestry.

  2. 1. Ash Products for Nutrient Recycling in Forestry : Leaching and Drying Characteristics

    Author : Peter Mellbo; Tommy Claesson; Sirkku Sarenbo; Hans Samuelsson; Högskolan i Kalmar; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Ash products; Wood ash; Leaching; Drying; Nutrient; ; Sustainable forestry; Forestry; Skogsskötsel; Miljövetenskap; Environmental Science;

    Abstract : As the demand for carbon dioxide neutral energy sources increases, forestry becomes more intensive. Entire trees are removed from the felling sites threatening the nutrient balance of the forest soils. READ MORE

  4. 2. Automation in forestry : development of unmanned forwarders

    Author : Ola Ringdahl; Thomas Hellström; Tomas Nordfjell; Arto Visala; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Computer science; Datavetenskap; Forest engineering; Skogsteknik; computer and systems sciences; data- och systemvetenskap;

    Abstract : For the last 50 year, forestry operations have become more and more mechanized. In modern forestry in Europe two machines are typically used; a harvester that fells, debranches and cross-cuts the trees into logs and a forwarder that transports them to the nearest road. READ MORE

  5. 3. Gendered Performances in Swedish Forestry : Negotiating Subjectivities in Women-Only Networks

    Author : Emmeline Laszlo Ambjörnsson; Anna Storm; Gunnel Forsberg; Natasha Webster; Maureen Reed; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; gender; femininity; female masculinity; feminist geography; feminist political ecology; environmental governance; forestry; neoliberalisation; collective action; postfeminism; spatiality; rurality; Sweden; Geography with Emphasis on Human Geography; geografi med kulturgeografisk inriktning;

    Abstract : Environmental resource use is intimately intertwined with gendered power relations. Overarching ideals, governance and management are shaped by the negotiation and performance of gendered subjectivities. This thesis identifies and analyses key features of such negotiations and performances in the context of contemporary Swedish forestry. READ MORE

  6. 4. Towards semi-automation of forestry cranes : automated trajectory planning and active vibration damping

    Author : Szabolcs Fodor; Leonid Freidovich; Carlos Vázquez; Anton Shiriaev; Torben Ole Andersen; Umeå universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Forestry; forwarder cranes; semi-automation; slewing actuator; automated trajectory planning; oscillations; inner boom actuator; active vibration damping; frequency estimation; input shaping control technique; H2-optimal control;

    Abstract : Forests represent one of the biggest terrestrial ecosystems of Earth, that can produce important raw renewable materials such as wood with the help of sun, air and water. To efficiently extract these raw materials, the tree harvesting process is highly mechanized in developed countries, meaning that advanced forestry machines are continuously used to fell, to process and to transport the logs and biomass obtained from the forests. READ MORE

  7. 5. Forestry machine and soil interaction for sustainable forestry

    Author : Abdurasul Pirnazarov; Ulf Sellgren; Kjell Andersson; Sally Shoop; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CTL-logging; forestry machine; forwarder; multi-body simulations; roots; terramechanics; wheel-soil interaction; WES model; Machine Design; Maskinkonstruktion;

    Abstract : More than 50 percent of the land area of the Nordic countries Finland, Norway, and Sweden are covered by dense forests and they are among the most important producers of forest products in the world. Forestry in these countries is based on sustainable management principles – reforestation follows harvesting. READ MORE