Дисертації з теми "Air pollution level"
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Michalaki, Maria. "Air Pollution in Gothenburg : Children's exposure to NO2 on a neighborhood level." Thesis, Umeå universitet, Institutionen för geografi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-172742.
Повний текст джерелаBhave, Prakash Viththal Seinfeld John H. "Air pollution at the single-particle level : integrating atmospheric measurements with mathematical models /." Diss., Pasadena, Calif. : California Institute of Technology, 2003. http://resolver.caltech.edu/CaltechETD:etd-05252003-091827.
Повний текст джерелаSzeto, Gin Nam. "Estimation of exposure level and infection risk of airborne virus in indoor environment /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MECH%202007%20SZETO.
Повний текст джерелаEdussuriya, Priyantha S. "Urban morphology and air quality: a study of street level air pollution in dense residential environments of HongKong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37672241.
Повний текст джерелаMilionis, Alexandros Epaminondas. "Climatology of temperature inversions over Eastern England; some implications for ground level air pollution." Thesis, University of East Anglia, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304848.
Повний текст джерелаEdussuriya, Priyantha S. "Urban morphology and air quality a study of street level air pollution in dense residential environments of Hong Kong /." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37672241.
Повний текст джерелаChapman, Peter Stuart. "Exposure to street level particulate pollution in urban Hong Kong and the associated health application of trams as a mobile monitor /." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42980021.
Повний текст джерелаMainolfi, Maria B. "Low Level Exposure to Air Pollution and Risk of Adverse Birth Outcomes in Hillsborough County, Florida." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4140.
Повний текст джерелаRadford, Michael. "A Study of Central Florida Nonroad VOC and NOs Emissions and Potential Actions to Reduce Emissions." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2472.
Повний текст джерелаM.S.Env.E.
Department of Civil and Environmental Engineering
Engineering and Computer Science
Environmental Engr MSEnvE
Chapman, Peter Stuart. "Exposure to street level particulate pollution in urban Hong Kong and the associated health: application of tramsas a mobile monitor." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42980021.
Повний текст джерелаBessling, Karen D. "Modeling the potential effects of growth reductions and changes in photosynthetic efficiency and needle retention on the stand-level growth of loblolly pine plantations." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43834.
Повний текст джерелаMaster of Science
Alanezi, Salwa. "Emission inventories from Kuwait petroleum refineries and respective ground level concentration of pollutants in the neighboring residential area." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12544.
Повний текст джерелаSpriggs, Amy. "An investigation into the use of fluctating asymmetry as a measure of low level air pollution stress in plants." Thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/25951.
Повний текст джерелаLothrop, Nathan, Khaleel Hussaini, Dean Billheimer, and Paloma Beamer. "Community-level characteristics and environmental factors of child respiratory illnesses in Southern Arizona." BIOMED CENTRAL LTD, 2017. http://hdl.handle.net/10150/624712.
Повний текст джерелаCAZULA, CAMILA D. "Dosimetria de sup(222)Rn no ar em ambientes localizados acima e abaixo do nível do solo." reponame:Repositório Institucional do IPEN, 2015. http://repositorio.ipen.br:8080/xmlui/handle/123456789/23739.
Повний текст джерелаMade available in DSpace on 2015-06-11T17:49:32Z (GMT). No. of bitstreams: 0
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
FAPESP:13/01841-9
Tenailleau, Quentin. "Multi-exposition en milieu urbain : approche multi-echelle de l'exposition humaine au bruit et à la pollution atmosphérique." Thesis, Besançon, 2014. http://www.theses.fr/2014BESA2052/document.
Повний текст джерелаEvery day, 15% of the European population is exposed to average noise or air pollution levels exceeding theEuropean legal threshold. Levels and distribution of each pollutant across the city depend of individual sourcesemissions, dispersion phenomenon, and urban environment. Consequently, spatial variability of multi-exposure levelremains mostly unknown. The aim of this Ph. D. thesis is to identify and describe multi-exposure situations in the cityof Besançon. Environmental noise levels, and concentrations of several air pollutants (NO2, benzene, PM10 and PM2.5),have been modeled using a fine scale grid (2m x 2m). Model compatibility has been maximized by the use of commoninput into the calculation software Mithra-SIG (for noise) and COPERT4/ADMS-urban (for air pollutants). In a firsttime, impact of the neighborhood definition on exposure levels has been explored for both pollutions. Twelveindicators, each representing a different definition of the exposure area in the dwelling vicinity, have been used toquantify exposure levels around the 10 865 inhabitable building of Besançon. Obtained results show a significantimpact of the neighborhood definition on the exposure levels. Different neighborhood definitions lead to a differentialbias caused by a different accounting for environmental variables. This bias exists for all studied pollutant, but indifferent proportion depending on the pollutant. In a second time, situations of multi-exposure to noise and NO2 havebeen identified in the city. Results indicate a complex relation between pollutants and allow the description of severalmulti-exposure situations across the city. This work constitute one of the firsts approaches of this kind in France andallow a better understanding of the existing relations between neighborhood, exposure area, environmental parametersand exposure levels
Šiuipys, Nerijus. "Priežemio ozono koncentracijos sklaida Kauno mieste ir jos ryšys su meteorologinėmis sąlygomis." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090810_112539-45872.
Повний текст джерелаOne of the major problems resulting from air pollution of the urban area, is the pollution caused by photochemical oxidants, among their, ground level ozone. The aim of this work was to assess distribution of ground level ozone concentration in Kaunas and its relationship to meteorological situation. Measurements was carried out in 2006 - 2009. Object of work has been selected Kaunas city. Throughout the city area ground level ozone concentration was measured by a sampling scheme for the 10 different measurement points. For determinate of ground level ozone concentration, we used ozone quality monitor „Aeroqual 300 Series“. Ground level ozone concentration was measured at midday from 12 to 14 and in the evening from 17 to 19 hours. Each site was carried out from 4 - 6 measurements. Study rezults revealed, that ground level ozone concentration distribution of each season is different. The maximum average ozone concentration was found in spring - summer season (72 g/m3), and the lowest in winter season (7 g/m3). The higher ground level ozone concentration episode (128 g/m3) was stated in spring season in 2009 year. Relationship between ground level ozone concentration and meteorological situations and nitrogen oxides (NOx) concentration was evaluated. The results showed statistically significant positive relationship between ozone concentration and temperature (r = 0,73; p = 0,00) and NO2 concentration (r = 0,48; p = 0,03). Between ground level ozone concentration and wind... [to full text]
Adams, Helen Sarah. "Exposure assessment of urban transport users to particulate air pollution." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246812.
Повний текст джерелаMuindi, Kanyiva. "Air pollution in Nairobi slums : sources, levels and lay perceptions." Doctoral thesis, Umeå universitet, Epidemiologi och global hälsa, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-138293.
Повний текст джерелаDick, A. L. "Trace elements in Antarctic snow and air." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376538.
Повний текст джерелаSimbi, Joseph. "Levels of selected gaseous pollutants in ambient air in the vicinity of a chemical industry, Kwekwe, Zimbabwe." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2015.
Повний текст джерелаThe integrity of natural air has been compromised due to the deposition of chemical, biological and particulate substances from natural and anthropogenic sources. Adverse health consequences arising from the exposure of plants, animals and human to elevated atmospheric concentrations have been reported severally. The ambient baseline levels of many air contaminants in urban and industrial layouts of many Africa cities, especially Zimbabwe have not been fully characterized. Information on levels of these contaminants and their real time variability is therefore scarce and scanty. In this study, the ambient air concentration levels of selected gaseous pollutants in the vicinity of a fertilizer production facility in Zimbabwe were investigated. Nine sampling stations were systematically and randomly identified for the measurement of selected air pollutants (SO2, NO2, and NH3) the fertilizer production factory to capture air quality data on all wind directions. The electrochemical Drager Sensors which rely on electrochemical measuring transducer for measuring concentration of gases under atmospheric conditions was used for the measurement of NH3, SO2, and NO2. The ambient air monitored was allowed to diffuse through a membrane into the sensor liquid electrolytes, containing a sensing electrode, a counter electrode, a reference electrode, and an electronic potentiostat-circuit which ensures constant electrical voltage between the sensing electrode and the reference electrode. The flow of electrons, generated by the reaction is proportional to the concentration of the measured gas. The observed concentrations of NH3, SO2, and NO2 measured within and around the study site were very variable. Levels of NH3 ranged between 0.36 - 7.36 ppm; corresponding values for SO2 and NO2 were 0.02 - 84.61 ppm and 0.61 - 34.78 ppm respectively. These concentrations were significantly higher (p < 0.05) than measured (NH3; 0.01 - 0.05 ppm: SO2; 0.03 - 0.18 ppm: NO2; 0.17 - 1.30 ppm) at the control sampling station about 5 km from the industry. Isokinetic and dissipation of the measured gases, governed by the processes of molecular diffusion and convection, confirmed a common pattern of distance dissipation. Thus, the cloud concentrations of NH3, SO2, and NO2 within the facility were higher than observed distances away from the fertilizer factory.
Zimbabwe Presidential Scholarship
Linaritakis, Konstantinos N. "Factors affecting traffic-related air pollutant levels in urban streets." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47154.
Повний текст джерелаDelgado-Rios, Marcos. "Microenvironmental air and soil monitoring of contaminants an evaluation of indoor and outdoor levels in Chihuahua City /." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
Повний текст джерелаYan, Chun-man, and 甄俊文. "The 1990 air pollution control regulation: a story of reducing the sulphur dioxide levels in ambient air in HongKong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45175019.
Повний текст джерелаKirk, Randall P. "The impact of residential wood combustion on indoor particulate matter levels." Virtual Press, 1988. http://liblink.bsu.edu/uhtbin/catkey/539632.
Повний текст джерелаDepartment of Natural Resources
Delfino, Ralph J. (Ralph John). "The relationship of urgent hospital admissions for respiratory illnesses to air pollution levels in Montreal." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41570.
Повний текст джерелаRoutinely monitored independent variables, derived from various government databases, included temperature, relative humidity, ozone, nitrogen dioxide, sulfur dioxide, coefficient of haze, and measures of particulate pollution, several of which were recorded only every sixth day. To permit a daily time series analysis, levels for the missing 5 days were modelled using meteorologic and other pollutant variables.
To control for confounding by season, the dependent and independent time series were detrended using a weighted 19-day moving average linear filter. To control for confounding by day-of-week cycles, the dependent series were pre-filtered with day-of-week indicator variables.
For the July to August periods, statistically significant relationships were shown for all respiratory admissions to 8-hour maximal average ozone levels 4 days prior to the admission day, relationships which were however confounded by temperature of the same lag day. After controlling for temperature, admissions for asthma, and for respiratory illnesses other than asthma, were significantly associated with particulate levels 2 to 4 days prior to the admission day for the warm but not the cold periods. Stronger associations were found using a filter which did not remove month-to-month temporal trends. A significant correlation of non respiratory admissions to particulate levels on the day of admission was confounded by temperature and relative humidity.
These results suggest that particulate air pollution, possibly acidic, during photochemically active periods is related to respiratory morbidity in Montreal. The effects shown, at levels mostly below current ambient air quality standards in North America, are relevant to public health, since hospital admissions are likely to reflect more frequent episodes of less serious illness.
Cruvinel, Brandao Fonseca Marinho Rayssa. "Atmospheric Pollutant Levels in Southeast Brazil During COVID-19 Lockdown: Combined Satellite and Ground-based Data Analysis." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/102026.
Повний текст джерелаMaster of Science
This study aims to explore satellite data applied to the lockdown context resultant from the COVID-19 pandemic in Brazil. Satellite data usage in air quality management is yet to be explored to its full potential. Two highly populated states were chosen: Sao Paulo (SP) and Rio de Janeiro (RJ). Local governments have been imposing limitations on private and public vehicle circulation, inducing a decrease in atmospheric pollutant levels, specifically nitrogen dioxide (NO2), which is directly emitted to the air by fuel combustion. NO2 is also short-lived in the atmosphere, so its variation within days can be easily captured. PM2.5, a category of fine inhalable particles, can be produced by wildfires, in addition to fuel burning and mechanical processes such as resuspension by cars. Here we retrieved daily NO2 vertical column densities for the month of May within the 2015-2020 years from the OMI instrument onboard of NASA's Aura satellite. Ground daily NO2 and PM2.5 measurements were also collected from local environmental agencies. Results showed an average 42% decrease of the NO2 column values in SP in 2020 compared to 2015-2019. The decrease was 49.6% in RJ for the same timeframe. Correspondent surface data showed a decrease of 13.3% (p-value = 0.099) and 18.8% (p-value = 0.077) during 2020 compared to 2019 in SP and RJ stations, respectively. No significant divergence in PM2.5 values was found between 2019 and 2020. Finally, weather data was added to the pollutant analysis. PM2.5 concentrations were associated with wildfires, while the NO2 levels found in 2020 for SP and RJ were attributed to local lockdown decrees. Satellite retrievals showed significant potential in filling out ground datasets, correlating with the SP and RJ surface data in 77% and 53%, respectively.
Al-Mutawa, Ayesha Ibrahim. "The influence of the meteorological conditions on air pollution levels in Emirate of Dubai, United Arab Emirates." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366431.
Повний текст джерелаAdonis, Marta. "Urban air pollution by polycyclic aromatic hydrocarbons in Santiago, Chile : levels, DNA adducts, genotoxicity and CYP1A induction." Thesis, University of Surrey, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298153.
Повний текст джерелаElkilani, Amal Sayed. "Modelling indoor volatile organic compound (VOC) levels based on experimentally determined parameters." Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299681.
Повний текст джерелаBrooks, J. Mark. "Predictors of indoor dust mite and cockroach levels." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2007. http://www.mhsl.uab.edu/dt/2007p/brooks.pdf.
Повний текст джерелаHazuka, John Anthony 1964. "Evaluation of chemcassette technology for monitoring low-levels of nitrogen-dioxide." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276766.
Повний текст джерелаBarnwell, Mackenzie S. "Evaluation of Occupational Exposure to In-Bus Traffic Related Air Pollution Concentrations and Noise Levels for Bus Drivers." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1623166803096552.
Повний текст джерелаDahlberg, Anton. "Influences of black carbon levels in the micro-environment inside urban buses." Thesis, Stockholms universitet, Institutionen för miljövetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-194706.
Повний текст джерелаPapapreponis, Panayiotis. "Residential exposure to low levels of air pollution from municipal waste incinerators and possible subtle effects on the health status of the community." Thesis, University of Dundee, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500571.
Повний текст джерелаAlbalawi, Salem Mohammad S. "Daily air pollution levels and asthma : exploring the influence of time-activity patterns on personal exposure in Al Jubail industrial city, Saudi Arabia." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3566.
Повний текст джерелаCervellati, Linda. "Determinants of Particulate Matter and Soot levels on the transport network of The Rotterdam-The Hague Metropolitan Region and evaluation of cyclists’ exposure among the different cycling infrastructure types." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Знайти повний текст джерелаRodríguez, González Sergio. "Sources and processes affecting levels and composition of atmospheric particulate matter in the Western Mediterranean." Doctoral thesis, Universitat Politècnica de Catalunya, 2002. http://hdl.handle.net/10803/6985.
Повний текст джерелаThe results showed that day-to-day variations in PM levels are highly influenced by the meteorology. From March to October, PM levels at rural, urban and industrial sites vary as a function of the concatenation of Atlantic air mass advections (Atlantic episodes with low PM levels) and regional circulations (Regional events with high PM and O3 levels) which induce the PM transport from urban/industrial to rural sites and the ageing of polluted air masses in the Western Mediterranean. From November to February low PM levels are recorded at rural sites, and variations in PM levels at urban/industrial sites are governed by the successive occurrence of Atlantic episodes and Local urban/industrial pollution events (with high PM, NOx and CO levels). The African dust events mainly occur from January to October and induce very high PM levels in all sites.
As a result of the frequency and intensity of the Regional episodes, PM levels at rural sites undergo a seasonal evolution with a summer maximum. The difference between PM levels at urban and rural sites presents an autumn-winter maximum owing to the occurrence of intensive Local urban pollution events.
The meteorological context in which the aforementioned episodes occur is discussed, with special emphasis on the synoptic scenarios giving rise to the African dust outbreaks in the different seasons.
Levels of PM components at the different study sites were compared. The seasonal evolution and the grain size distribution of these components was studied and the form of occurrence was determined. The chemical characterisation shows that high levels of natural mineral dust components (e.g. Al, Fe, Mg, Ti, Sr, Ca) are simultaneously recorded in PM10 and PM2.5 at all sites during African episodes. Other interesting findings are: 1) a marked seasonal evolution of nitrate levels and grain size distribution due to the occurrence of ammonium-nitrate in autumn-winter, 2) an excess of Na with respect to the Na/Cl marine ratio in summer owing to reactions of acids with sea salt, and 3) high background levels of ammonium-sulphate in summer. Moreover, the levels of elemental, organic and mineral carbon were determined.
At the rural site, the PM10 annual mean reaches 22µg/m3, the main contributions being secondary particles from industrial emissions (27% of PM10), vehicle exhausts (14-23%), natural mineral dust (23%) and sea spray (5-9%). At the urban kerbside station, the PM10 annual mean reaches 49µg/m3, the main contributions being vehicle exhausts (35-45% of PM10), secondary particles from industrial emissions (24-31%), natural + road dust (25%) and sea spray (4-6%). At the urban kerbside station, the PM2.5 annual mean reaches 34µg/m3, the main contributions being vehicle exhausts (41-53% of PM2.5), secondary particles from industrial emissions (29-35%) and mineral dust (9-11%).
These results have important implications for the implementation of the PM10 EU standards. The natural load in ambient PM10 levels in Eastern Spain accounts for 30-40% of the 2010 EU annual PM10 limit value (20µg/m3). In this region it will not be easy to meet this limit value given that the annual PM10 levels are in the range 17-20µg/m3 at rural, 30-45µg/m3 at urban and 45-60µg/m3 at industrial sites. The high background levels of PM10 in this region are favoured by the specific orographic and meteorological context of the Mediterranean and by the high load of mineral dust caused by the soil re-suspension and the frequent occurrence of African dust events. At rural sites, 2-5 exceedances of the EU daily PM10 limit value (50µg/m3) are recorded every year during African dust outbreaks. On average, 15 African induced and 40-80 non-African induced exceedances of the EU daily PM10 limit value are recorded every year at the urban kerbside stations.
The parameter selected for PM monitoring is a key factor. Most of the PM species resulting from combustion and vehicle exhaust emissions have a fine size distribution (<2.5µm), with exception of nitrate in summer, whereas sea spray and mineral dust present a coarse size distribution. The interference of African dust in the PM monitoring is significantly reduced when PM2.5 instead of PM10 is monitored. Natural mineral dust concentrations during African episodes are in the ranges 20-30µg/m3 in PM10 and 10-15µg/m3 in PM2.5. However, PM2.5 is not a suitable parameter for PM monitoring in all environments. The selection of PM10 or PM2.5 should be conditioned by the type of anthropogenic activity. At urban sites, PM2.5 contains mainly vehicle exhaust products, whereas the road traffic dust principally occurs in the 2.5-10µm fraction. PM2.5 is not a suitable parameter for monitoring some industrial activities (e.g. ceramics, cement production or mining) with primary PM emissions in the 2.5-10µm range.
Brines, Pérez Mariola. "From ultrafine to coarse particles: variability and source apportionment of atmospheric aerosol levels in the urban Mediterranean climate." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/384537.
Повний текст джерелаLa contaminació atmosfèrica en ambients urbans és motiu de preocupació pel seu impacte en el medi ambient i en la salut de la població. Les fonts d'emissió d'aerosols atmosfèrics i la seva evolució a l'atmosfera depenen de factors geogràfics així com de les condicions climàtiques i meteorològiques de l'àrea d'estudi. A la conca Mediterrània Occidental, i a la ciutat de Barcelona en particular, el clima càlid, l'escassa precipitació, l'alta densitat de població i determinats factors geogràfics que poden dificultar la dispersió dels contaminants i influenciar molt marcadament els nivells i composició dels aerosols. En aquest context es va desenvolupar la campanya intensiva SAPUSS (Solving Aerosol Problems by Using Synergistic Strategies) a Barcelona a l'octubre de 2010, que consistia en mesures simultànies d'aerosols a diversos llocs de la ciutat, amb l'objectiu d'estudiar la variabilitat espacial i temporal dels aerosols. L'estudi dels nivells d'aerosols en funció de la mida de les partícules a 4 ciutats més amb un clima d'alta insolació similar al de Barcelona (Madrid, Brisbane, Roma i Los Angeles) ha permès avaluar les fonts que afecten a la variabilitat de partícules ultrafines en aquests ambients urbans. En particular s'han estudiat les característiques dels episodis de nucleació urbans (formació de noves partícules), així com la seva freqüència. També s'han caracteritzat les principals fonts d'aerosols de diàmetre inferior a 1µm i 10 iim (PM1 i PM10, respectivament) en diverses ambients urbans de Barcelona durant SAPUSS. Això ha permès estudiar la variabilitat a nivells horitzontal i vertical dins l'atmosfera urbana. L'estudi de les fonts que afecten els aerosols de l' àrea urbana de Barcelona i ambients similars en funció de la seua mida (des de les ultrafines fins a les grolleres) ha permès identificar les principals fonts que afecten a cada fracció en particular i als aerosols en general i per tant proposar mesures aplicables per a l'avaluació i millora de la qualitat de l'aire.
Dohanich, Francis Albert. "On-Road Remote Sensing of Motor Vehicle Emissions: Associations between Exhaust Pollutant Levels and Vehicle Parameters for Arizona, California, Colorado, Illinois, Texas, and Utah." Thesis, University of North Texas, 2003. https://digital.library.unt.edu/ark:/67531/metadc5524/.
Повний текст джерелаKadiyala, Akhil. "Identification of Factors Affecting Contaminant Levels and Determination of Infiltration of Ambient Contaminants in Public Transport Buses Operating on Biodiesel and ULSD Fuels." Connect to full text in OhioLINK ETD Center, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1221524830.
Повний текст джерелаTypescript. "Submitted as partial fulfillments of the requirements for The Master of Science in Engineering." "A thesis entitled"--at head of title. Bibliography: leaves 81-92.
Heng-WeiWang and 王恆煒. "Air Pollution Control Strategy for Ground-Level Ozone Improvement in Taiwan." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/wq263u.
Повний текст джерелаBhave, Prakash Viththal. "Air Pollution at the Single-Particle Level: Integrating Atmospheric Measurements with Mathematical Models." Thesis, 2003. https://thesis.library.caltech.edu/2037/1/Bhave_thesis.pdf.
Повний текст джерелаParticulate air pollution is of growing concern in the United States and around the world. Elevated concentrations of aerosols (solid particles and liquid droplets suspended in air) are correlated with increased cases of lung cancer, cardiopulmonary disorders, and human mortality. A detailed understanding of the size, chemical composition, and concentration of atmospheric particles is needed to assess their effects on human health, as well as on regional visibility and global climate. One can acquire such knowledge through direct measurements, or by utilizing mathematical air quality models. New and innovative instruments allow us to measure the size and composition of individual particles, rather than to infer aerosol chemical properties from bulk particulate matter samples. Concurrently, air quality models have been developed to numerically simulate the emissions of discrete particles, and their transport and chemical evolution in the atmosphere. This thesis focuses on how to integrate and compare measurements taken by state-of-the-science single-particle instruments with the air pollutant properties calculated using state-of-the-science mathematical models. A 1996 field experiment conducted in the Los Angeles air basin serves as the case study for this thesis research.
Comparisons of model calculations against single-particle observations identify specific areas where model improvements are needed, and also identify important areas for future instrumental development. These comparisons contribute to our understanding of atmospheric pollution at the single-particle level, and ultimately, may provide tremendous value to policy makers who are seeking least-cost solutions to urban and regional air quality problems. After presenting initial comparisons of single-particle measurements and model results, efforts to quantify and categorize the single-particle chemical composition data are described. The quantitatively reconstructed single-particle measurements are compared with mathematical model calculations of the atmospheric aerosol mixing characteristics. Finally, an example is presented of how the model and measurement combination enhance our ability to reduce particulate pollution in the air we breathe.
Makgae, Reuben Ephraim. "Investigation of the level of airborne contamination in the Pebble Bed Modular Reactor(PBMR) building or specific room due to design base leakrate of 0.1% of helium inventory / Reuben Ephraim Makgae." Thesis, 2003. http://hdl.handle.net/10394/11357.
Повний текст джерелаThesis (MSc. ARST) North-West University, Mafikeng Campus, 2003
Cassidy, Brandon Edward. "Ambient and street-level air pollution studies within Trujillo, Peru and Baguio City, Philippines." 2005. http://purl.galileo.usg.edu/uga%5Fetd/cassidy%5Fbrandon%5Fe%5F200512%5Fms.
Повний текст джерелаQuinn, Ashlinn Ko. "Modifiable Risk in a Changing Climate: Linking household-level temperature, humidity, and air pollution to population health." Thesis, 2016. https://doi.org/10.7916/D83F4PWW.
Повний текст джерелаУльянова, Ольга Сергіївна. "Сезонні зміни екологічного стану атмосферного повітря в урбоекосистемах Запорізької області". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/4180.
Повний текст джерелаUA : Кваліфікаційна робота магістра: с.77, 6 рис., 18 табл., 69 джерел. Об’єкт дослідження – процес забруднення атмосферного повітря урбоекосистеми. Предметом дослідження даної кваліфікаційної роботи є джерела, проблеми, наслідки забруднення атмосферного повітря урбоекосистеми. Методи дослідження. Дослідження проводилося на основі системно-функціонального, динамічного, комплексного наукових підходів, за допомогою наукових методів: аналізу і синтезу, індукції і дедукції, моделювання, методів польових досліджень, методів статистичного аналізу. Метою кваліфікаційної роботи магістра є проаналізувати теоретичні та практичні аспекти сезонних змін екологічного стану атмосферного повітря в урбоекосистемах Запорізької області. Теоретично та практично визначено: сезонні зміни та дана порівняльна характеристика забруднення атмосфери урбоекосистем Запорізької області хімічними та фізичним видами забрудненнями. Розраховані середні значення концентрації монооксиду вуглецю на постах спостереження. Запропонавані практичні заходи щодо зниження рівня атмосферного та шумового забруднення в урбоекосистемах Запорізької області. За результатами проведених вимірювань еквівалентного рівня звуку Lекв на території міста Запоріжжя, встановлені такі основні джерела акустичного навантаження: автотранспорт, електричний транспорт, який використовується в мережі громадських перевезень, масові скупчення людей в межах ринків, супермаркетів.
EN : Qualifying work of the master: 77 s., 6 fig., 18 tab., 69 Sources. The object of research is the process of air pollution of the urban ecosystem. The subject of research of this qualification work are the sources, problems, consequences of air pollution of the urban ecosystem. Research methods. The study was conducted on the basis of system-functional, dynamic, integrated scientific approaches, using scientific methods: analysis and synthesis, induction and deduction, modeling, field research methods, methods of statistical analysis. The purpose of the master's qualification work is to analyze the theoretical and practical aspects of seasonal changes in the ecological state of atmospheric air in urban ecosystems of Zaporozhye region. Theoretically and practically determined: seasonal changes and given comparative characteristics of atmospheric pollution of urban ecosystems of Zaporizhia region by chemical and physical types of pollution. The average values of carbon monoxide concentration at the observation posts are calculated. Practical measures to reduce the level of air and noise pollution in urban ecosystems of Zaporozhye region are proposed. According to the results of measurements of the equivalent sound level Lekv in the city of Zaporozhye, the following main sources of acoustic load were identified: vehicles, electric transport used in the public transport network, mass gatherings of people within markets, supermarkets.
Пірогова, Ірина Миколаївна. "Моніторинг стану довкілля м. Запоріжжя та ризики пов’язані з антропогенним забрудненням". Магістерська робота, 2020. https://dspace.znu.edu.ua/jspui/handle/12345/4095.
Повний текст джерелаUA : В роботі 128 сторінок, 23 таблиці, 38 рисунків. Було використано 59 літературних джерел, з них 6 іноземною мовою. Об'єкт дослідження – атмосферне повітря. Предмет дослідження – оцінка рівня забруднення повітря за допомогою розрахунку індексів та показників забруднення, ризики для здоров’я, обумовлені інгаляційним впливом забруднень атмосфери. Методи досліджень: методика оцінки якості повітря за індексом забруднення атмосфери та показником забруднення, методологія оцінки ризику для здоров'я населення. Статистична обробка результатів проводилась з використанням програми Microsoft Excel. Метою кваліфікаційної роботи є оцінка рівня забруднення м. Запоріжжя в цілому, рівнів ризику для здоров'я населення від забруднення повітря Шевченківського району. Теоретично та експериментально визначено: стан системи моніторингу повітря м. Запоріжжя потребує технічної та якісної реформації, рівень забруднення повітря у досліджуваний період відзначається високим, має нерівномірний розподіл по районам. Максимальні показники забруднення спостерігались по формальдегіду, оксидам азоту, фенолу та пилу загального. Сумарний не канцерогенний ризик є значно вищим за допустимий. Результати досліджень доцільно використовувати для оцінювання забруднення повітряного шару в м. Запоріжжя з метою оптимізації управління в галузі охорони атмосферного повітря та прийняття заходів по зменшенню його забруднення.
EN : In the work 128 pages 23 tables, 38 pictures were used 59 literary sources, including 6 in a foreign language. The object of the research is: Atmospheric air. The subject of the study is: Assessment of the level of air pollution by calculating indices and indicators of pollution, health risks due to inhalation exposure to polluted atmospheres. Research methods: Methods for assessing air quality by air pollution index and pollution index, methodology for assessing the risk to public health. Statistical processing of the results was performed using Microsoft Excel. The purpose of the qualification work is: assessment of the level of pollution in Zaporizhia as a whole, levels of risk to public health from air pollution in Shevchenkivskyi district. Theoretically and experimentally determined: The state of the air monitoring system in Zaporizhia needs technical and qualitative reform, the level of air pollution in the study period is high, has an uneven distribution by district. Maximum pollution was observed for formaldehyde, nitrogen oxides, phenol and total dust. The total non-carcinogenic risk is much higher than acceptable. The results of research should be used to assess air pollution in Zaporozhye in order to optimize management in the field of air protection and take measures to reduce its pollution.
Sarwar, Md Golam. "Fine particle formation in indoor environments levels, influencing factors and implications /." Thesis, 2002. http://wwwlib.umi.com/cr/utexas/fullcit?p3126114.
Повний текст джерелаHsieh, Chun-Fa, and 謝泉發. "Effect of Air Pollution on Exhaled Nitric Oxide Levels in Schoolchildren." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/27888139108348174361.
Повний текст джерела國立陽明大學
公共衛生研究所
87
Asthma is a chronic inflammatory disease of the airway. Recently, studies have found that exhaled nitric oxide (eNO) was correlated with airway inflammation. We used eNO measurement and questionnaire to clarify the effect of air pollution on asthma and airway disease in schoolchildren. Our study subjects were third grade students from 石牌國小 in Taipei and 淡水國小 in Tamshui. We recruited 256 students (male: 133, female: 123) from the two schools. Study was performed between October 1998 and Apr 1999. The effect of children''s atopy or airway disease on eNO, and the effect of air pollutants and children''s eNO were analyzed. Finally, We compared the effect of air pollutants on children with or without atopic airway disease. In the study subjects, 10.2% children had physician-diagnosed asthma, 19.1% children had wheezing, 24.6% children had physician-diagnosed allergic rhinitis, and 5.4% children had physician-diagnosed dermatitis. Family factors that influenced eNO: children''s father with higher education, mother with allergic rhinitis, and sibling with allergic rhinitis would increase children''s eNO level. Children''s factors affecting eNO included: physician-diagnosed asthma, wheeze, allergic rhinitis, dermatitis, cough in the past year, and upper airway infection (at the time of examination) would increase children''s eNO level. Air pollution: Ozone concentration, ambient temperature, and particulate matter would decrease eNO level, but ambient nitric oxide concentration would increase eNO level. We also found that eNO level was continually increasing from October 1998 to Mar 1999. And it was decreased from Mar 1999 to Apr 1999. URI, sulfur dioxide, and particulate matter had more pronounced effect on nonatopic students. We also found that atopic students were more sensitive to ambient temperature. We concluded that atopy, airway disease and air pollution were correlated with eNO. The most important factor in air pollution that influenced children''s eNO was ambient temperature. We also found that eNO had a time-dependent trend. In conclusion, ozone concentration, ambient temperature, ambient nitric oxide, URI, and allergic rhinitis were important on eNO level.