Sökning: "field observations"
Visar resultat 1 - 5 av 857 avhandlingar innehållade orden field observations.
1. Electrostatic plasma waves associated with collisionless magnetic reconnection : Spacecraft observations
Sammanfattning : Magnetic reconnection is a fundamental plasma process where changes in magnetic field topology result in explosive energy conversion, plasma mixing, heating, and energization. In geospace, magnetic reconnection couples the Earth’s magnetosphere to the solar wind plasma, enabling plasma transport across the magnetopause. LÄS MER
2. Varumärkenas fält : Produktion av erkännande i Stockholms reklamvärld
Sammanfattning : I Varumärkenas fält ställs frågor som: Hur vinner man erkännande i Stockholms reklamvärld? Hur säljer reklamproducenter detta erkännande till sina uppdragsgivare? Vad för slags erkännande är statliga reklamköpare ute efter att vinna genom sitt samarbete med prisbelönta och erkända reklamproducenter? I kontrast till en spridd föreställning att reklamen ”speglar samhället” är grundantagandet i denna studie att reklamen i första hand speglar den värld som skapar den, dvs. reklamvärlden. LÄS MER
3. Substorm Features in the High-Latitude Ionosphere and Magnetosphere : Multi-Instrument Observations
Sammanfattning : The space around Earth, confined in the terrestrial magnetosphere, is to some extent shielded from the Sun's solar wind plasma and magnetic field. During certain conditions, however, strong interaction can occur between the solar wind and the magnetosphere, resulting in magnetospheric activity of several forms, among which substorms and storms are the most prominent. LÄS MER
4. Magnetic Reconnection in Space Plasmas : Cluster Spacecraft Observations
Sammanfattning : Magnetic reconnection is a universal process occurring at boundaries between magnetized plasmas, where changes in the topology of the magnetic field lead to the transport of charged particles across the boundaries and to the conversion of electromagnetic energy into kinetic and thermal energy of the particles. Reconnection occurs in laboratory plasmas, in solar system plasmas and it is considered to play a key role in many other space environments such as magnetized stars and accretion disks around stars and planets under formation. LÄS MER
5. Heat and water flows in freezing and thawing soils : numerical modelling, laboratory and field observations
Sammanfattning : A laboratory study of infiltration rates into frozen and unfrozen fine sand, including temperature effects of both soil and infiltration water, is reported. The average infiltration rate varied from about 10.6 mm/min for unfrozen conditions, to about 1-2 mm/min for frozen conditions. LÄS MER
