Avancerad sökning

Visar resultat 11 - 15 av 55 uppsatser som matchar ovanstående sökkriterier.

  1. 11. The Aerosol-Chase Project. A continental Lagrangian experiment.

    Master-uppsats, Lunds universitet/Kärnfysik

    Författare :Adrian Reyes Martin; [2021]
    Nyckelord :Science General; Earth and Environmental Sciences; Technology and Engineering; Physics and Astronomy;

    Sammanfattning : Determining how aerosol particle number size distributions evolve during long range transport and how aerosol sources contribute to the aerosol population is one of the greatest conundrums in aerosol science. Current monitoring of particle size distribution is done in fixed stations that provide limited information about the reasons why size distribution changes with time. LÄS MER

  3. 12. The Impact of COVID-19 Restrictions on Air Quality- Based on Seven Cities in China

    Master-uppsats, Lunds universitet/Nationalekonomiska institutionen

    Författare :Cheng Chen; [2021]
    Nyckelord :COVID-19; air quality; fixed effect model; regression discontinuity; Business and Economics;

    Sammanfattning : Many researchers have studied the impact of the COVID-19 restrictions. However, in terms of the air quality impact, few studies have done so for specific cities. In this study, seven cities in China under the first stage of transmission prevention have been selected. The air quality standard indicators discussed are NO2 (Nitrogen dioxide), PM2. LÄS MER

  4. 13. IoT-based air pollution monitoring system for smart villages

    Kandidat-uppsats, Högskolan Kristianstad/Fakulteten för naturvetenskap

    Författare :Nedim Jazavac; Hikmat Tatari; [2021]
    Nyckelord :Air Pollution; LoRaWAN; IoT; Smart Villages; Monitoring;

    Sammanfattning : Air pollution is a global issue which has negative impacts not only on the environment but also on human health. Therefore, it is important to design and implement systems to allow cities and villages to monitor air quality so that they take the required actions to maintain a good air quality in the city/village. LÄS MER

  5. 14. Urbanization and economic freedom - are they threats to air quality? : Evidence from a panel study of low and lower-middle-income countries

    Kandidat-uppsats, Uppsala universitet/Nationalekonomiska institutionen

    Författare :Albin Lundmark; Emma Roxström; [2021]
    Nyckelord :PM2.5; urbanization; economic freedom; fixed effects; system GMM; panel data;

    Sammanfattning : Air pollution (in terms of PM2.5) is severe in developing countries, and the rapid population growth accompanied by urbanization may limit their potential economic development. This paper aims to investigate if urbanization and economic freedom cause higher levels of PM2.5 in developing countries. LÄS MER

  7. 15. The Impact of the COVID-19 Lockdown on the Urban Air Quality: A Machine Learning Approach.

    Master-uppsats, Högskolan Dalarna/Institutionen för information och teknik

    Författare :Srinivas Bobba; [2021]
    Nyckelord :Covid-19; air pollutants; Lockdown; AVOVA; Permutation Test; Machine Learning; feature importance.;

    Sammanfattning : ‘‘SARS-CoV-2’’ which is responsible for the current pandemic of COVID-19 disease was first reported from Wuhan, China, on 31 December 2019. Since then, to prevent its propagation around the world, a set of rapid and strict countermeasures have been taken. LÄS MER