Search results for " ai"
showing 10 items of 2441 documents
Sampling and analysis of pesticides in ambient air.
2008
Developments in the sampling and determination of pesticides in ambient air have been discussed and data on the occurrence of pesticides in atmosphere have been presented. Developments in active sampling methods were reviewed and the different materials used for trapping pesticides from gas and particulate phases were discussed. Likewise, the use and developments of passive air samplers were reviewed. This article pays special attention to the analysis of pesticides trapped from ambient air, and recapitulate the procedures for extraction, clean-up and determination of these substances. Improvements in sampling procedures, analytical methods and monitoring activities are necessary to advance…
An Epidemiological Study to Investigate Links between Atmospheric Pollution from Farming and SARS-CoV-2 Mortality.
2022
Exposure to atmospheric particulate matter and nitrogen dioxide has been linked to SARS-CoV-2 infection and death. We hypothesized that long-term exposure to farming-related air pollutants might predispose to an increased risk of COVID-19-related death. To test this hypothesis, we performed an ecological study of five Italian Regions (Piedmont, Lombardy, Veneto, Emilia-Romagna and Sicily), linking all-cause mortality by province (administrative entities within regions) to data on atmospheric concentrations of particulate matter (PM2.5 and PM10) and ammonia (NH3), which are mainly produced by agricultural activities. The study outcome was change in all-cause mortality during March–Apri…
An experimental investigation on air quality inside WindJet aircraft
2012
ABSTRACT In order to improve the passengers and crew comfort during the flight, the aim of the present paper is a study of the cabin air quality through experimental measures on randomly selected flight segments of an Italian airline company, WindJet. Carbon dioxide, ultrafine particles, temperature and relative humidity have been measured by using low cost high efficiency instrumental equipments. Exploring ways to improve aircraft cabin air quality, WindJet and University of Palermo are investigating equipment, filters and components of the ventilation system. In this paper, after description of both ventilation systems for aircrafts of WindJet and the instrumental equipments used to measu…
Case study: inorganic pollutants associated with particulate matter from an area near a petrochemical plant.
2004
The area of Gela (Sicily, Italy) contains one of the largest petroleum refineries in Europe and also has several oil fields both on land and offshore. This paper discusses how the oil refinery and traffic-related air pollution affect the chemical composition of airborne particulate matter over the town of Gela, using pine needles and urban road dust as the means of survey. Forty-one samples of pine needles from Pinus halepensis (Mill.) and two composite samples of roadway dust, each subdivided into six size fractions, were analyzed for major and trace elements. Information on the natural or anthropogenic origin of the observed heavy metals was deduced from factor analysis and element distri…
Dust, Metals and Metalloids in the Environment: From Air to Hair .
2013
Billions tons of particulate matter, made up of inorganic and organic compounds, are released every year into the atmosphere, from both anthropogenic and natural sources. The latter, which include geogenic material from erosion, agriculture, sea spray and volcanic activity, account for about 97% of the total mass of particles. The contribution of anthropogenic sources, about 3%, is more pronounced in industrialised and also in urban areas, where vehicular traffic is one of the most important sources. When examining the health impact, in addition to mass level and size, two other main characteristics of particulate matter need to be considered: its nature and chemical composition. These para…
Analysis of the traffic management policy measures adopted in the central business district of Palermo
2005
his research analyses the effects on air quality produced by the traffic management measures adopted in the Central Business District of Palermo (i.e. park price, the closure to traffic of Maqueda Road, etc.). Weather data series, pollutant concentrations data series (1997-2003) and the traffic data collected in 2003 were analysed by using different regression statistical models, to appraise the effectiveness of the traffic management policies adopted by City Council, understanding also the cause/effect relationships among the pollutant concentrations (CO, NO2, O3, C6H6 and PM10) and the traffic flows variations over time
Complex Networks in Air Transport
2016
The application of CNT to air traffic management has seen significant growth in recent years. This is partly because air traffic can be seen as the superposition of different networks, including the networks of airports, sectors and navigation points. Moreover each of these networks can be seen as a multiplex – for example, by associating each layer with a different airline. The study of the topology of these networks is important for several reasons related to understanding, monitoring, controlling, and optimising the air traffic system. The topological properties of air traffic networks are useful: (i) for studying how the air traffic has changed in recent years; (ii) for identifying the …
Shock control bump design optimization on natural laminar aerofoil
2011
The chapter investigates Shock Control Bumps (SCB) on a Natural Laminar Flow (NLF) aerofoil; RAE 5243 for Active Flow Control (AFC). A SCB approach is used to decelerate supersonic flow on the suction/pressure sides of transonic aerofoil that leads delaying shock occurrence or weakening of shock strength. Such an AFC technique reduces significantly the total drag at transonic speeds. This chapter considers the SCB shape design optimisation at two boundary layer transition positions (0 and 45%) using an Euler software coupled with viscous boundary layer effects and robust Evolutionary Algorithms (EAs). The optimisation method is based on a canonical Evolution Strategy (ES) algorithm and inco…
Darba aizsardzības sistēmas raksturojums Viļakas novada domē un preventīvo pasākumu plāna izstāde darba aizsardzībā
2017
Darba aizsardzības sistēmas raksturojums Viļakas novada domē un preventīvo pasākumu plāna izstrāde darba aizsardzība. Kvalifikācijas darbs uz 45lpp., 5 tab., 13 att., 32 lit.avotus, 3 pielikumus. Pētījums sastāv no trim daļām: 1.Apkopota un analizēta literatūra un citi avoti par darba aizsardzības sistēmu un tas izveidošanu. 2.Aprakstītas pētījuma metodes: anketa un dokumentācijas audits. 3.Iegūto datu apkopojums un rezultātu analīze, kā arī pilnveidošanas iespējas un pasākuma plāna izstrādes iespējas. Atslēgas vārdi: darba vide, iekšēja uzraudzība, pašvaldība, pasākumu plāns.
Darba aizsardzības sistēmas pilnveidošanas iespējas Baltinavas novada Baltinavas vidusskolā
2017
Kvalifikācijas darba mērķis: pētīt un novērtēt Baltinavas vidusskolas darbu, darba aizsardzības sistēmas veidošanā. Uzdevumi mērķa sasniegšanai: 1.Pētīt un analizēt literatūru, informācijas avotus un normatīvos aktus par darba aizsardzības sistēmu; 2.Analizēt Baltinavas vidusskolas darbu, darba aizsardzības sistēmas izveidē; 3.Izstrādāt priekšlikumus darba aizsardzības sistēmas pilnveidošanai Baltinavas vidusskolā. Kvalifikācijas darbs sastāv no 4 daļām. Kvalifikācijas darba pirmajā daļā ir aprakstīta darba aizsardzības sistēmas būtība un tās teorētiskie aspekti, iekļaut tajā darba aizsardzības organizatoriskās struktūras izveidošanu un darba vides iekšējās uzraudzības, darba vides risku no…