Search for dissertations about: "Vasa warship."

Showing result 1 - 5 of 8 swedish dissertations containing the words Vasa warship..

  2. 1. The warship Vasa : A Study of Lignin, Extractives and Acids in the oak wood

    Author : Dina Dedic; Monica Ek; Bjarne Holmbom; Sigbritt Karlsson; KTH; []
    Keywords : ;

    Abstract : The oak wood timbers of the 17th century Swedish warship Vasa are weak. The weakening has been attributed to cellulose degradation, which is more extensive in the interior of the timbers compared to the surface regions. Further, the mechanism of cellulose degradation was attributed to oxidative reactions involving iron as a catalyst. READ MORE

  4. 2. Static and time-dependent mechanical behaviour of preserved archaeological wood : Case studies of the seventeenth century warship Vasa

    Author : Alexey Vorobyev; Kristofer Gamstedt; Eiichi Obataya; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; archaeological wood; compression test; cubic samples; elastic constants; oak wood; barrelling formation; quasi-static loading; resonant ultrasound spectroscopy RUS ; Vasa ship; creep; 3D laser scanning; Time-dependent behaviour;

    Abstract : Wooden objects have been widely used in the history of humanity and play an important role in our cultural heritage. The preservation of such objects is of great importance and can be a challenging task. This thesis investigates the static and time-dependent mechanical behaviour of archaeological oak wood from the Vasa warship. READ MORE

  5. 3. The power and the glory : the sculptures of the warship Wasa

    Author : Hans Soop; Stockholms universitet; []
    Keywords : HUMANIORA; HUMANITIES; Vasa regalskepp ;

    Abstract : In 1956 the wreck of the 64-gun Swedish warship Wasa, sunk on her maiden voyage in the harbour of Stockholm the 10th of August 1628, was found at a depth of 32 metres. Preparations for salvaging the ship started, and in April 1961 the Wasa broke the surface after 333 years on the sea bottom. READ MORE

  6. 4. In-situ assessment of density and material properties in timber structures by non-destructive and semi-destructive testing

    Author : Thomas Kruglowa; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; X-ray; Vasa warship.; semi-destructive testing SDT ; density determination; non-destructive testing NDT ; calibration procedure; Keywords: In-situ assessment;

    Abstract : ABSTRACTIn the assessment of timber structures, diagnostic investigations of the structural members and connections are generally necessary. The assessment often requires appropriate non-destructive testing (NDT) and semi-destructive testing (SDT) techniques. READ MORE

  7. 5. Conservation of the wood of the Swedish warship Vasa of A.D. 1628. Evaluation of polyethylene glycol conservation programmes

    Author : Birgitta Håfors; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Anti shrink efficiency ASE ; archaeological wet site; dimensional stabilisation; conservation; osmosis; polyethylene glycol PEG ;

    Abstract : The principal aim of this dissertation is to investigate whether or not polyethylene glycol (PEG) has acted as a dimension stabilizing agent of the Vasa wooden material, i.e. READ MORE