Sökning: "virtuella partiklar"

Hittade 5 avhandlingar innehållade orden virtuella partiklar.

  1. 1. Computational fluid dynamics application in indoor air quality and health

    Författare :Parastoo Sadeghian; Sasan Sadrizadeh; Sture Holmberg; Ann Tammelin; Olof Sköldenberg; Catherine Noakes; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ventilation systems; Indoor air quality IAQ ; Bacteria-carrying particles BCP ; Infectious respiratory disease; Operating room OR ; Thermal comfort; Computational fluid dynamics CFD ; ventilationssystem; bakteriebärande partiklar; infektionssjukdomar i luftvägarna; operationsrum; termisk komfort; numerisk strömningsmekanik; Strömnings- och klimatteori; Fluid and Climate Theory;

    Sammanfattning : Indoor air quality directly affects the comfort, performance, and well-being of occupants. Indoor pollution can cause immediate or long-term health effects and has been responsible for 4.1% of global deaths in recent decades. LÄS MER

  3. 2. Structure Functions and Final-State Properties in Deeply Inelastic electron-proton Scattering

    Författare :Hamid Kharraziha; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cosmic rays; event generators; colour factors; High energy interactions; hadronic jets; QCD; the Linked Dipole Chain model; quantum mechanics; relativity; gravitation; statistical physics; thermodynamics; Matematisk och allmän teoretisk fysik; kvantmekanik; klassisk mekanik; Kosmisk strålning; högenergi; classical mechanics; Mathematical and general theoretical physics; relativitet; statistisk fysik; termodynamik; Fysicumarkivet A:1997:Kharraziha;

    Sammanfattning : In this thesis, we give a description of the detailed structure of the proton and a description of the final-state properties in electron-proton scattering. Qualitative results, in a purely gluonic scenario with the leading log approximation, and quantitative results, where quarks are included and some sub-leading corrections have been made, are presented. LÄS MER

  4. 3. QCD Phenomenology of Heavy Particle Dynamics

    Författare :Emanuel Norrbin; Teoretisk partikelfysik - Geonomgår omorganisation; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; High energy interactions; heavy quarks; QCD; charm asymmetry; hadronization; string fragmentation; colour reconnection; leptoquarks; parton shower; cosmic rays; Kosmisk strålning; högenergi; Fysicumarkivet A:2000:Norrbin;

    Sammanfattning : In this thesis the phenomenology of Quantum Chromo Dynamics (QCD) is studied in a variety of circumstances from both perturbative and non-perturbative perspectives. The main emphasis is on the production and hadronization of heavy particles, specifically heavy quarks, gauge bosons, leptoquarks and supersymmetric particles. LÄS MER

  5. 4. Smart Technologies for Unmanned Surface Vessels : On the Path Towards Full Automation

    Författare :Mårten Lager; Institutionen för datavetenskap; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Virtual reality; human interaction; Positioning; Navigation; Unmanned Surface Vessel; Autonomous system; Teleoperation;

    Sammanfattning : As for the automotive industry, large efforts are being made by industry andacademia to create autonomous ships. Te solutions for this is very technologyintense, as many building blocks, often relying on AI technology, need to worktogether to create a complete system that is safe and reliable to use. LÄS MER

  7. 5. Volumetric MRI measurements of velocity and flow - Accuracy, visualisation and technical improvements

    Författare :Anders Nilsson; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MRI; 4D flow; phase contrast MRI; velocity mapping;

    Sammanfattning : In the last two decades, phase-contrast magnetic resonance imaging (PC-MRI) has evolved from two-dimensional velocity and flow measurements to volumetric, time-resolved depictions of velocity fields (4D PC). The acquisition of time-resolved velocity fields allows flow visualisations that might provide better understanding of the dynamics of the cardiac system. LÄS MER