Sökning: "snow"

Visar resultat 6 - 10 av 231 avhandlingar innehållade ordet snow.

  1. 6. Brash Ice and Level Ice Growth, Effects of Snow

    Författare :Vasiola Zhaka; Andrzej Cwirzen; Kaj Riska; Robert Ettema; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; brash ice growth; level ice growth; snow effects; slush; snow ice; macroporosity; piece size distribution; Byggmaterial; Building Materials;

    Sammanfattning : Brash ice occurs due to frequent navigation in ice-infested waters, typically along established navigation tracks regularly maintained by icebreakers and harbors. The accumulation and consolidation of brash ice between two ship passages are influenced by meteorological factors including the cumulative freezing air temperatures, and the mechanical processes such as ice-breaking due to ship passages. LÄS MER

  3. 7. On the Multi-Scale Nature of Ski-Snow Friction : Field Testing, Characterisation and Modelling of Cross-Country Ski Performance

    Författare :Kalle Kalliorinne; Andreas Almqvist; Roland Larsson; Steph Forrester; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cross-Country Skiing; Winter Sports; Winter Olympics; Multi-Scale; Sports Equipment; Contact Mechanics; Ski-Camber Profile; Ski-Base Texture; Ski; Snow; Friction; RTK-GNSS; Machine Elements; Maskinelement; Centre - Centre for Sports and Performance Technology SPORTC ; Centrumbildning - Centrum för idrotts- och prestationsteknologi SPORTC ;

    Sammanfattning : The goal of most endurance sports is to get from point A to B in the shortest time possible. Throughout the course, athletes need to overcome the resistive forces that are present in their specific sport. LÄS MER

  4. 8. Snow Contamination of Cars: Adhesive Particle Collisions with Exterior Surfaces

    Författare :Tobias Eidevåg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; icing; particle laden flow; turbulent dispersion; premelting; sensor availability; exterior soiling; snow physics; particle resuspension; snow adhesion;

    Sammanfattning : An ongoing challenge regarding autonomous vehicles is the obstruction of sensors by contaminants on exterior surfaces. This often occurs when driving in harsh weather conditions, where the contaminant can be, for example, water spray, dirt, or snow. LÄS MER

  5. 9. Contributions to Confidentiality and Integrity Algorithms for 5G

    Författare :Jing Yang; Nätverk och säkerhet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stream ciphers; 5G; Confidentiality and integrity algorithms; SNOW-V; SNOW-Vi; Local pseudorandom generators; SNOW 3G; ZUC-256; Linear cryptanalysis; Guess-and-determine attacks;

    Sammanfattning : The confidentiality and integrity algorithms in cellular networks protect the transmission of user and signaling data over the air between users and the network, e.g., the base stations. LÄS MER

  7. 10. The Effect of Snow on Plants and Their Interactions with Herbivores

    Författare :Mikaela Torp; Johan Olofsson; Christa Mulder; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Snow; arctic ecosystem; plant-herbivore interactions; phenology; nitrogen; phenolics; experimental manipulation; natural gradient; inter-annual variability; Biology; Biologi;

    Sammanfattning : The ongoing climate changes are predicted to accelerate fast in arctic regions with increases in both temperatures and precipitation. Although the duration of snow cover is generally expected to decrease in the future, snow depth may paradoxically increase in those areas where a large amount of the elevated precipitation will fall as snow. LÄS MER