Sökning: "nodal points"

Visar resultat 1 - 5 av 16 avhandlingar innehållade orden nodal points.

  1. 1. Knotted Nodal Band Structures

    Författare :Marcus Stålhammar; Emil Bergholtz; Edwin Langmann; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; teoretisk fysik; Theoretical Physics;

    Sammanfattning : It is well known that in conventional three dimensional (3D) Hermitian two band models, the intersections between the energy bands are generically given by points. The typical example are Weyl semimetals, where these singular points can be effectively described as Weyl fermions in the low energy regime. LÄS MER

  3. 2. The Construction of the Professional Identity of the TV News Presenter in Two Chinese News Programmes : A Discourse-Theoretical Analysis

    Författare :Yiming Chen; Nico Carpentier; Göran Svensson; Benjamin De Cleen; Ike Picone; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Discourse theory; Discourse-theoretical analysis; the TV news presenter; professional identity construction; articulation; nodal points; Chinese journalistic practice; Medie- och kommunikationsvetenskap; Media and Communication Studies;

    Sammanfattning : This PhD research project investigates how the professional identity of the Chinese TV news presenter is constructed in two news programmes, Guangdong News and TVS News, both based at Guangdong TV. The overarching theoretical framework of the project takes its inspiration from Laclau and Mouffe's (1985) post-structuralist discourse theory (DT). LÄS MER

  4. 3. Predictors of Lymph Node Metastasis in Primary Breast Cancer - Risk Models for Tailored Axillary Management

    Författare :Looket Dihge; Lund Kirurgi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Breast Cancer; Axillary lymph node dissection; Sentinel lymph node biopsy; Ultrasonography; Nomogram; Artificial neural network; Gene Expression; Prediction model;

    Sammanfattning : Most patients with breast cancer present with low-risk tumors, node-negative disease, and excellent prognosis. For these patients, routine axillary nodal staging by sentinel lymph node biopsy (SLNB) has no therapeutic benefit. For patients with limited sentinel lymph node metastasis, completion axillary nodal dissection is controversial. LÄS MER

  5. 4. Simulation of Delamination Initiation and Growth in Fiber Composite Laminates

    Författare :Rikard Borg; Michael R. Wisnom; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis concerns the topic of delaminations in unidirectional fiber reinforced plastic composite laminates.A model for the simulation of delamination initiation and growth has been developed. It is based on fracture mechanics and formulated as a combination of a cohesive zone model and a linear elastic adhesive penalty formulation. LÄS MER

  7. 5. Multi-conductor transmission line model for electrified railways: A method for including responses of lumped devices

    Författare :Ziya Mazloom; Rajeev Thottappillil; Farhad Rachidi; KTH; []
    Nyckelord :;

    Sammanfattning : For studying the response to transients caused by lightning and other electromagnetic disturbance sources, electrified railway systems can be represented as a system of multiconductor transmission lines (MTL) above a finitely conducting ground. The conductors present in this system would be wires for traction power supply, auxiliary power, return conductors for traction current, the tracks, and finitely conducting ground. LÄS MER