Sökning: "skruv"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet skruv.

  1. 1. Twist-Symmetric Periodic Structures : Properties and Applications

    Författare :Oskar Zetterström; Oscar Quevedo-Teruel; Martin Norgren; Nelson Fonseca; Jorge Ruiz-Cruz; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : In this thesis, periodic structures with higher symmetries symmetries are discussed. The main focus of the thesis is on twist symmetries. Importantly, the attractive properties of twist symmetries for the control of electromagnetic wave propagation are demonstrated. LÄS MER

  3. 2. Stabilising system for multi-storey beam and post timber buildings

    Författare :Gabriela Tlustochowicz; André J.M. Jorissen; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Träbyggnad; Timber Structures;

    Sammanfattning : For multi-storey timber buildings, the stabilisation against horizontal loads is one of the key issues, which becomes more severe with height. There are a few main concepts utilised to resist lateral forces; shear wall action, diagonal bracing, and frame action. LÄS MER

  4. 3. Epitaxy of group III-nitride materials using different nucleation schemes

    Författare :Rosalia Delgado Carrascon; Vanya Darakchieva; Daniela Gogova; Alice Hospodková; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Group III-nitride materials, gallium nitride (GaN), aluminum nitride (AlN) and indium nitride (InN) have direct band gaps with band gap energies ranging from the infrared (InN) to the ultraviolet (GaN) and to the deep ultraviolet (AlN) wave-lengths, covering the entire spectral range from 0.7 eV to 6.2 eV upon alloying. LÄS MER

  5. 4. Dynamic fixation of unstable trochanteric hip fractures. A clinical and radiographic evaluation of the Medoff sliding plate

    Författare :Karl Lunsjö; Lund Ortopedi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; orthopaedics; Surgery; Radiography.; Implants; Hip fractures; Trochanteric; traumatology; Kirurgi; ortopedi; traumatologi;

    Sammanfattning : In stabilising extracapsular hip fractures, the Medoff sliding plate (MSP) differs from other screw-plates by its compression capacity along the femoral shaft (uniaxial dynamization). Additional compression along the neck of femur can be achieved by primary release of the lag screw (biaxial dynamization). LÄS MER

  7. 5. Scaphoid Fractures - epidemiology, diagnosis and treatment

    Författare :Peter Jörgsholm; Malmö Handkirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Scaphoid fracture; carpal fracture; paediatric; radiography; CT; MRI; arthroscopy; scapholunate ligament injury; radial comminution; surgical treatment; conservative treatment; fracture union;

    Sammanfattning : Abstract The scaphoid is the most commonly fractured carpal bone. The diagnosis is difficult and untreated the long-term results are poor. Approximately 10% do not unite even if they are treated properly. The aim of this thesis was to study scaphoid fracture epidemiology, diagnosis and treatment. LÄS MER