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Visar resultat 1 - 5 av 124 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Road Surface and Tyre Interaction : Functional Properties affecting Road Dust Load Dynamics and Storage

   Författare :Joacim Lundberg; Sigurdur Erlingsson; Mats Gustafsson; Xavier Querol; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Road dust; Road abrasion wear; Studded tyre abrasion wear; Texture; Emissions; Abrasion wear model; NORTRIP; PM10; Particles; Stone Mastic Asphalt – SMA; Porous Pavements; Double Layered Porous Asphalt Concrete – DLPAC; Road traffic noise; Rolling Resistance; Friction; Holistic; Function; Functional properties; Functional demands; Temporal variation; Spatial variation; Vägdamm; Vägslitage; Dubbdäcksslitage; Textur; Emissioner; Slitagemodell; NORTRIP; PM10; Partiklar; Asfaltsbetong; stenrik - ABS; Dränerande beläggning; Dubbeldränerande beläggning; Buller; Rullmotstånd; Friktion; Holistisk; Funktion; Funktionskrav; Tidsvariation; Rumsvariation; Byggvetenskap; Civil and Architectural Engineering; Building Materials; Byggnadsmaterial;

   Sammanfattning : Luftburna partiklar (PM) är ett problem för människans hälsa, där flertalet samband mellan negativa hälsoeffekter finns mellan luftföroreningar finns, bland annat för respiratoriska sjukdomar, lungcancer och kardiovaskulära sjukdomar med flera. I länder där dubbdäck används, till exempel Sverige, Finland och Norge, och sandning av vägar och gator genomförs vintertid för att säkerställa god friktion kommer en betydande andel av partiklarna från vägslitage och nedkrossning av sand vilket bidrar till PM10. LÄS MER

3. 2. Marine Current Resource Assessment : Measurements and Characterization

   Författare :Nicole Carpman; Karin Thomas; Mats Leijon; Sandra Eriksson; Mairead Atcheson; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ADCP; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : The increasing interest in converting energy from renewable resources into electricity has led to an increase in research covering the field of marine current energy, mainly concerning tidal currents and in-stream tidal turbines. Tides have the advantage of being predictable decades ahead. LÄS MER

4. 3. Planning for equitable emergency health care : Assessing the geography of ambulance supply and demand in Sweden

   Författare :Jacob Hassler; Vania Ceccato; Charles Branas; KTH; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; emergency health care; spatial analysis; equity; policy; akutvård; rumslig analys; jämlikhet; policy; Urbana och regionala studier; Urban and Regional Studies;

   Sammanfattning : Providing high-quality health care to everyone who needs it is a central objective for theSwedish health care system. One way in which this goal is broadly pursued is by allocatingresources that maximize the geographical coverage of ambulances, aiming at reducingambulance response times as much as possible, for as many as possible. LÄS MER

5. 4. Nitrogen removal in treatment wetlands : Factors influencing spatial and temporal variations

   Författare :Sofia Kallner Bastviken; Karin Sundblad-Tonderski; Jos Verhoeven; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wetlands; denitrification; macrophytes; nitrogen; nitrification; model; treatment wetlands; potential denitrification; Biology; Biologi;

   Sammanfattning : Decreasing the nitrogen transport from land to surrounding seas is a major task throughout the world to limit eutrophication of the coastal areas. Several approaches are currently used, including the establishment of wetlands, to decrease the transport of nitrogen. LÄS MER

7. 5. Hydrogeochemistry and spatial variability of arsenic and other trace elements in the Lower Katari Basin around Lake Titicaca, Bolivian Altiplano. : Impact on drinking water quality and groundwater management

   Författare :Israel Quino Lima; Prosun Bhattacharya; Jerker Jarsjö; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arsenic; trace elements; multivariate analysis; spatial variability; hydrogeology; spatio-temporal variability; Lower Katari Basin; Bolivian Altiplano; alluvial sediments; Arsenik; spårelement; multivariat analys; rumslig variabilitet; hydrogeologi; spatio-temporär variation; Nedre Katari-bassängen; Bolivian Altiplano; alluviala sediment; Land and Water Resources Engineering; Mark- och vattenteknik;

   Sammanfattning : Arsenic (As) contamination in drinking water is a world-wide problem. Thenatural origin of As, its mobility and transport are of great interest in BolivianAltiplano (Lower Katari Basin: LKB and Sothern Poopó Basin: SPB) due topresence of mineral ore deposits, brines, hot springs and volcanic rocks. LÄS MER