Search for dissertations about: "Dimensionless"

Showing result 1 - 5 of 61 swedish dissertations containing the word Dimensionless.

  2. 1. Study of a Large Deformable Mirror Concept

    Author : Rikard Heimsten; Astronomi - Genomgår omorganisation; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Large deformable mirror - Adaptive optics - Distributed Control - Local control: actuator family - Faceplate: vibration modes - Faceplate: Dimensionless modal analysis;

    Abstract : It is attractive to integrate a large deformable mirror for adaptive optics into an astronomical telescope rather than using relay optics within an auxiliary instrument. However, the resulting large deformable mirror can be expensive, particularly for extremely large telescopes. READ MORE

  4. 2. Advective Collisions in Random Flows

    Author : Kristian Gustafsson; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : In nature, suspensions of small particles in fluids are common. An important example are rain droplets suspended in turbulent clouds. Such clouds can start to rain very quickly and the reason for this is still not fully explained, but it is believed that the turbulent motion in the cloud plays an important role. READ MORE

  5. 3. On the Nucleation and Inoculation of Metals

    Author : Lena Magnusson; Hasse Fredriksson; Peter Schumacher; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solidification; nucleation; inoculation; undercooling; interface energy; refractory metals; latent heat; inclusions; nodular cast iron; Materials science; Teknisk materialvetenskap;

    Abstract : Latent heat during recalesence and nucleation and post-recalesence temperature was analysed for refractory metals. An effect on latent heat was found by alloying the pure elements with other refractories. Latent heat was found to be 15-65% of tabulated values. Interface energy was evaluated from undercooling experiments. READ MORE

  6. 4. Boundary lubrication in screw-nut transmissions

    Author : Lars O. Ekerfors; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : This report deals with the function of screw-nut transmissions (powerscrews). Two aspects of this function have been investigated. Owing to different running parameters, primarily sliding speed and average pressure between the sliding surfaces of the thread, the coefficient of friction and the efficiency will vary within wide limits. READ MORE

  7. 5. Impact response and delamination of composite plates

    Author : Robin Olsson; KTH; []
    Keywords : ;

    Abstract : This thesis covers a selection of issues associated with impact response and delarknation of composite plates. The problems include contact problems, impact response and delankration testing. READ MORE