Sökning: "space weather"

Visar resultat 16 - 20 av 68 avhandlingar innehållade orden space weather.

  1. 16. Contaminant transport by air infiltration from crawl space to occupant area: Numerical simulations and field measurements in Swedish schools

    Författare :Fredrik Domhagen; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crawl space; contaminants; infiltration model; monte carlo method; airtightness; air permeability;

    Sammanfattning : Some Swedish school buildings built in the 1960’s and 1970’s have indoor air quality problems. Many of these buildings have a crawl space from which contaminants are suspected to originate. The poor indoor air quality cause discomfort among pupils and teachers and a solution to the problem is not always found. LÄS MER

  3. 17. Managing knowledge sharing of extreme weather induced impacts on land transport infrastructure : Case study of the Swedish Transport Administration

    Författare :Monika Rydstedt Nyman; Lars Nyberg; Magnus Johansson; Eva Liljegren; Peter Söderholm; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lessons learned; risk management; climate change adaptation; accident investigation method; extreme weather events; natural hazard; land transport infrastructure; maintenance; lärande; kunskapsåterföring; risk hantering; klimatanpassning; olycksutredningsmetod; naturolyckor; landtransport infrastruktur; underhåll; Risk and Environmental Studies; Risk- och Miljöstudier;

    Sammanfattning : Extreme weather events and effects of climate change are threats to the transport sector’s functionality and safety. Risk management in this context implies a necessity to focus on the connection between near-term experiences and coping strategies on one hand, and long-term adaptation analyses on the other. LÄS MER

  4. 18. Radar Probing of the Sun

    Författare :Mykola Khotyaintsev; Bo Thide'; Valentyn Mel'nyk; Christian Hanuise; Uppsala universitet; []
    Nyckelord :Space and plasma physics; solar radar; active experiments; space physics; solar corona; plasma; Rymd- och plasmafysik;

    Sammanfattning : This thesis is dedicated to the theory of solar radar experiments. The Sun exhibits a variety of interesting and complicated physical phenomena, examined mainly through analysis of its radiation. Active solar probing by radar provides an alternative possibility to study the Sun. LÄS MER

  5. 19. Mesoscale processes in the polar atmosphere : radar remote sensing, balloon-borne in situ measurements and modelling

    Författare :Maria Mihalikova; Suzanne Gray; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rymdteknik; Space Technology;

    Sammanfattning : Mesoscale processes (atmospheric phenomena with horizontal scales ranging from a few tens to several hundred kilometres and lasting from a few tens of minutes to a few days) have the potential to influence the chemical composition of the troposphere. Tropopause folds and mountain waves are two important types of mesoscale processes. LÄS MER

  7. 20. Studies of Atmospheric Water Vapor Using the Global Positioning System

    Författare :Ragne Emardson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; troposphere; microwave radiometry; climatology; radiosondes; atmospheric water vapor; Global Positioning System; time series analysis; VLBI; space geodesy; GPS; Very Long Baseline Interferometry; meteorology; radio wave propagation; Kalman filtering;

    Sammanfattning : Atmospheric water vapor is of fundamental interest in the Global Positioning System (GPS) and Very Long Baseline Interferometry (VLBI) techniques. These techniques are based on the timing of radio waves propagating through the atmosphere. LÄS MER