Sökning: "field test"

Visar resultat 1 - 5 av 805 avhandlingar innehållade orden field test.

  1. 1. Undrained shear strength in clay slopes - Influence of stress conditions. A model and field test study

    Författare :Hjördis Löfroth; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; preconsolidation pressure; piezocone test; slope; model test; consolidation; horizontal stress; clay; undrained shear strength; direct simple shear test; field vane test; field test;

    Sammanfattning : To counteract natural hazards such as landslides, current methods for evaluation of soil properties as a mean for determining the safety level of natural slopes need to be refined. The empirical relationships used for estimation of the undrained shear strength from piezocone and field vane test are based on the stress conditions valid for horizontal ground and normally consolidated or slightly overconsolidated soil. LÄS MER

  2. 2. Motivational aspects of test-taking measuring test-taking motivation in Swedish national test contexts

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Eva Knekta; Umeå universitet.; [2017]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Test-taking motivation; Swedish national tests; validity; expectancy-value theory; task value; expectancies; young adolescents; self-report instrument; interview; structural equation modelling; test stakes; didactics of educational measurement; beteendevetenskapliga mätningar;

    Sammanfattning : The overall aim of the work underlying this thesis was to improve the understanding of students’ test-taking motivation in connection to achievement tests for young adolescents. The thesis includes four studies and a summary. All four studies explore test-taking motivation and are all connected to validity in one way of another. LÄS MER

  3. 3. Moisture Influence on Structural Behaviour of Pavements Field and Laboratory Investigations

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Farhad Salour; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Falling Weight Deflectometer FWD ; backcalculation; unbound material; subgrade; seasonal variation; moisture content; spring-thaw; drainage; pavement stiffness; field test; pavement instrumentation; resilient modulus; permanent deformation; repeated load triaxial test; unsaturated soil; matric suction.; Civil and Architectural Engineering; Byggvetenskap; Transportvetenskap; Transport Science;

    Sammanfattning : The structural behaviour of pavements in cold regions can considerably be affected by seasonal variation in environmental factors such as temperature and moisture content. Along with the destructive effect of heavy traffic loads, climatic and environmental factors can considerably contribute to pavement deterioration. LÄS MER

  4. 4. Dynamic train-turnout interaction: : mathematical modelling numerical simulation and field testing

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Elias Kassa Gebretsadik; Elias Kassa; [2007]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SRA - Transport; SRA - Transport; contact forces; Karhunen–Loève expansion; dynamic train–turnout interaction; field test; wheel–rail contact geometry; stochastic analysis; switches and crossings;

    Sammanfattning : Two models for simulation of dynamic interaction between train and turnout are developed. The first one is derived using a commercial software for dynamics of multi-body systems. LÄS MER

  5. 5. Improved computerized perimetric threshold strategies

    Detta är en avhandling från Department of Ophthalmology, Lund University

    Författare :Boel Bengtsson; Lunds universitet.; Lund University.; [1999]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; probability maps; normal limits; test time; clinical testing; test strategies. glaucoma; test algorithms; false positive answers; Visual field testing; computerized perimetry; Ophtalmology; Oftalmologi;

    Sammanfattning : Popular Abstract in Swedish Föreliggande arbete syftade till att utveckla en ny effektivare metod för undersökning av ögats synfält. Synfältet kan definieras som allt ett fixerande öga kan uppfatta. Det perifera seendet mäts vid synfältsundersökning (perimetri). LÄS MER