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Visar resultat 1 - 5 av 471 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. De samiska metalldepåerna år 1000-1350 : i ljuset av fyndet från Mörtträsket, Lappland

    Författare :Inger Zachrisson; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; HUMANIORA; HUMANITIES; HUMANIORA; HUMANITIES; Saami; metal deposits; sacrificial sites; tradesman’s stock; thief’s hiding-place; pewter pendants; ring-shaped brooches; tin; lead; pewter casting; ornamentation; silver hoards; culture fixation; Offerfynd; Samiska kultplatser-- Sverige -- Lappland; Mörtträsket; Gråträsk;

    Sammanfattning : The thesis arises out of a new find from Mörtträsket, Lapland, which can be compared with the eleven so called "Finds from Lapp Places of Sacrifice" from North Scandinavia, dated to c. 1000-1350. The Mörtträsket find is characterized by newly made objects and is interpreted as a tradesman's stock. LÄS MER

  3. 2. Seismic Exploration Solutions for Deep-Targeting Metallic Mineral Deposits : From high-fold 2D to sparse 3D, and deep-learning workflows

    Författare :Magdalena Markovic; Alireza Malehmir; Gilles Bellefleur; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Exploration; Seismic; Mineral Deposits; Diffraction; Deep learning;

    Sammanfattning : Mineral exploration has in recent years moved its focus to greater depths than ever before, particularly in brown fields. Exploring new deposits at depth, if economical, would not only expand the life of mine but also provide minimal environmental impacts. It allows the existing mining infrastructures to be used for a longer period. LÄS MER

  4. 3. Local or central snow deposits?

    Författare :Karin Reinosdotter; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; VA-teknik; Urban Water Engineering;

    Sammanfattning : Snow handling includes activities such as removing, transporting and dumping the snow, as well as controlling the slipperiness. It is a complex issue that has been widely discussed in the media during the past years. The discussions have been focused mainly on snow deposits and the effect created by de icers. LÄS MER

  5. 4. Chemical Properties of FBC Ashes

    Författare :Britt-Marie Steenari; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; straw ash; environmental impact of ash handling; sintering; deposits; fouling; wood ash recycling; FBC; ash leaching; ash chemistry; PFBC; forest fertiliser; ash hydration reactions; fuel additives; wood ash characteristics; CaS; ash melting; plant nutrient recycling;

    Sammanfattning : In this thesis several aspects of ash chemistry are discussed. An issue of primary concern for boiler operators is the formation of ash deposits. New biomass fuels are introduced, many of which have unfavourable ash melting behaviour due to high levels of alkali metal species and chlorine. LÄS MER

  7. 5. Investigations of Chlorine-Induced High Temperature Corrosion of Steels

    Författare :Nicklas Folkeson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sulphur; alkali; chlorine; field exposures; HCl-induced corrosion; high temperature corrosion; deposits.; chloride-induced corrosion; waste; 310S; HCl;

    Sammanfattning : The high corrosivity of the fireside environment in waste and biomass fired boilers is commonly attributed to the presence of chlorine-containing compounds. Chlorine-induced high temperature corrosion is not well understood, however. LÄS MER