Sökning: "impact tests"

Visar resultat 1 - 5 av 557 avhandlingar innehållade orden impact tests.

  1. 1. Assessing mathematical creativity : comparing national and teacher-made tests, explaining differences and examining impact

    Författare :Jesper Boesen; Johan Lithner; Torulf Palm; Gunnar Gjone; Umeå universitet; Gothenburg University; Göteborgs universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Mathematical reasoning; creative reasoning; moderate high stake; teacher made tests; imitative reasoning; assessment; impact; influence; effect; mathematical competence; national tests; MATHEMATICS; MATEMATIK; Mathematical reasoning;

    Sammanfattning : Students’ use of superficial reasoning seems to be a main reason for learning difficulties in mathematics. It is therefore important to investigate the reasons for this use and the components that may affect students’ mathematical reasoning development. LÄS MER

  2. 2. Impact wave process modeling and optimization in high energy rate explosive welding

    Författare :Mohammad Tabatabaee Ghomi; Jafar Mahmoudi; Nils Erik Hannerz; Mälardalens högskola; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Explosive welding; Impact; Wave; Deformation; Velocity; Engineering mechanics; Teknisk mekanik; Energy- and Environmental Engineering; energi- och miljöteknik;

    Sammanfattning : Impact waves are used in many different industries and are classified according to whether they cause plastic or elastic deformations. In the plastic deformation mode, these waves can be used to produce special electrical joints. In the elastic deformation mode, they can be used to detect leakage or to measure the thickness of pipes. LÄS MER

  3. 3. Significance of Human Papillomavirus (HPV) Analysis for the Detection of Precancerous Cervical Lesions : Impact of Self Sampling

    Författare :Karin Sanner; Matts Olovsson; Ingrid Wikström; Erik Wilander; Sven-Eric Olsson; Uppsala universitet; []
    Nyckelord :human papilloma virus; HPV; self-sampling; organized screening; cervical cancer screening; Obstetrik och gynekologi; Obstetrics and Gynaecology;

    Sammanfattning : Cervical cancer is the second most common cancer, with about 500 000 new cases per year among women worldwide. With a well-organized screening programme the number of cases can be reduced by more than 50%. In spite of having such a screening programme there are still around 450 new cases yearly in Sweden. LÄS MER

  4. 4. Out-of-Round Railway Wheels - Literature Survey, Field Tests and Numerical Simulations

    Författare :Anders Johansson; Chalmers University of Technology; []
    Nyckelord :impact loads; wheel out-of-roundness; FASTSIM; wheel removal criteria; full-scale measurements; impact load detectors; dynamic train-track interaction; wheel polygonalization; wheel flats; wear modelling;

    Sammanfattning : .... LÄS MER

  5. 5. Characteristics of nearside car crashes : an integrated approach to side impact safety

    Författare :Cecilia Sunnevång; Maria Krafft; Mats Lindkvist; Christer Hydén; Umeå universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; side impact; WorldSID; thorax; injuries; side airbag; sidokollision; WorldSID; thorax; injuries; side airbag; biomechanics; biomekanik; Epidemiology; epidemiologi;

    Sammanfattning : Introduction: Approximately 1.25 million people globally are killed in traffic accidents yearly. To achieve the UN Global Goal of a 50% reduction of fatal and serious injuries in 2020 a safer infrastructure, as well as new safety technologies, will be needed. Side crashes represent 20% of all serious and 25 % of fatal injuries. LÄS MER