Search for dissertations about: "extensional"

Showing result 16 - 20 of 60 swedish dissertations containing the word extensional.

  2. 16. Influence of springy impact interface and curved drill rods on energy transfer in percussive rock drilling

    Author : Changming Wu; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och berganläggningsteknik;

    Abstract : The influence of springy impact interface and of curved drill rods on energy transfer in percussive rock drilling was studied. Analytical models for pneumatic and hydraulic rock drills were introduced, in which the springy piston-rod impact interface was taken into account. READ MORE

  4. 17. Geochemical and geochronological constraints on 1.88 and 1.80 Ga magmatic events in the Gällivare area, northern Sweden

    Author : Zimer Sarlus; Paul Evins; Luleå tekniska universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Malmgeologi; Ore Geology;

    Abstract : The Gällivare area is situated in northern Norrbotten, Sweden, and hosts the Aitik Cu-Au deposit and the Malmberget Fe deposit. In addition, more than 17 mineral prospects and mineralizations are present, among these the currently developed Nautanen Cu-Au deposit. READ MORE

  5. 18. Consolidation and Rheology at High Solids Content

    Author : Jerker Jäder; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Engineering; Kemiteknik;

    Abstract : Paper and board are pigment coated in order to achieve a smooth surface, thereby enhancing the optical and printing properties. In the most frequently used technique, a metal blade is used for metering off the coating colour, which is typically applied by roll or jet application. READ MORE

  6. 19. Interaction of Segments along Rifts that Separate Continents and Ridges that Spread Ocean Floors

    Author : Tatiana Tentler; Christopher Talbot; Olivier Dauteuil; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; extension; oceanic floor; rift; normal fault; segment; interaction; propagation; Geovetenskap; Earth sciences; Geovetenskap;

    Abstract : The face of the Earth is constantly renewed by continental rifts that open and allow ridges to spread oceanic floor. Both types of these linear extensional structures are morphologically and structurally segmented. This thesis aims to provide insights into the interaction of such segments as they propagate and mature. READ MORE

  7. 20. Techniques for Efficient Constraint Propagation

    Author : Mikael Zayenz Lagerkvist; Seif Haridi; Christian Schulte; Pierre Flener; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; constraint programming; constraint propagation; optimization; Computer science; Datalogi;

    Abstract : This thesis explores three new techniques for increasing the efficiency of constraint propagation: support for incremental propagation, improved representation of constraints, and abstractions to simplify propagation.  Support for incremental propagation is added to a propagator centered propagation system by adding a new intermediate layer of abstraction, advisors, that capture the essential aspects of a variable centered system. READ MORE