Analysis and Methods of Reduction of Noise in Air Traffic

Kroz temu ovoga rada analizirano je pitanje utjecaja buke komercijalnog zrakoplovstva na ljude i njihovo zdravlje. Izvori buke komercijalnog zrakoplovstva podijeljeni su na buku pogonskih skupina i buku strukture zrakoplova. Međunarodna regulativa buke zrakoplova donosi odredbe prema podacima koji se utvrđuju metodama mjerenja buke. Do 2050. godine, međunarodnom regulativom Europske unije teži se cilju smanjenja buke do 65%. ICAO (prema Annexu 16 Volume 1) propisuje metode mjerenja te mjere redukcije buke za sve tipove zrakoplova. Također, u radu su obrađeni načini smanjenja buke tehnologijskim, operativnim i ekonomskim mjerama. Važno je istaknuti mjere zračnih luka za redukciju buke kao što je, “policijski sat“, gradnja zvučnih barijera te korištenje (tiših) zrakoplova novih generacija.Throughout this final work many questions are analized about noise of commercial air traffic that affects humans and their health. Noise sources of commercial air traffic can be divided on propulsive noise and aircraft structure noise. International Regulations for aircraft noise decides different kinds of measures according to data that are being determined by measuring noise level. By 2050. European Union International Regulations are targeting to lower the noise level by 65%. ICAO (according to Annex 16 Volume 1) gives different methods of measuring and measures of noise reduction for all types of aircrafts. Also, all sorts of noise reduction are being described such as technological, operative and economical measures. It is important to notice airports measures for noise reduction such as curfew, building sound barriers and using quieter aircrafts of new generations

Analysis and Methods of Reduction of Noise in Air Traffic

Kroz temu ovoga rada analizirano je pitanje utjecaja buke komercijalnog zrakoplovstva na ljude i njihovo zdravlje. Izvori buke komercijalnog zrakoplovstva podijeljeni su na buku pogonskih skupina i buku strukture zrakoplova. Međunarodna regulativa buke zrakoplova donosi odredbe prema podacima koji se utvrđuju metodama mjerenja buke. Do 2050. godine, međunarodnom regulativom Europske unije teži se cilju smanjenja buke do 65%. ICAO (prema Annexu 16 Volume 1) propisuje metode mjerenja te mjere redukcije buke za sve tipove zrakoplova. Također, u radu su obrađeni načini smanjenja buke tehnologijskim, operativnim i ekonomskim mjerama. Važno je istaknuti mjere zračnih luka za redukciju buke kao što je, “policijski sat“, gradnja zvučnih barijera te korištenje (tiših) zrakoplova novih generacija.Throughout this final work many questions are analized about noise of commercial air traffic that affects humans and their health. Noise sources of commercial air traffic can be divided on propulsive noise and aircraft structure noise. International Regulations for aircraft noise decides different kinds of measures according to data that are being determined by measuring noise level. By 2050. European Union International Regulations are targeting to lower the noise level by 65%. ICAO (according to Annex 16 Volume 1) gives different methods of measuring and measures of noise reduction for all types of aircrafts. Also, all sorts of noise reduction are being described such as technological, operative and economical measures. It is important to notice airports measures for noise reduction such as curfew, building sound barriers and using quieter aircrafts of new generations

Analysis and Methods of Reduction of Noise in Air Traffic

Kroz temu ovoga rada analizirano je pitanje utjecaja buke komercijalnog zrakoplovstva na ljude i njihovo zdravlje. Izvori buke komercijalnog zrakoplovstva podijeljeni su na buku pogonskih skupina i buku strukture zrakoplova. Međunarodna regulativa buke zrakoplova donosi odredbe prema podacima koji se utvrđuju metodama mjerenja buke. Do 2050. godine, međunarodnom regulativom Europske unije teži se cilju smanjenja buke do 65%. ICAO (prema Annexu 16 Volume 1) propisuje metode mjerenja te mjere redukcije buke za sve tipove zrakoplova. Također, u radu su obrađeni načini smanjenja buke tehnologijskim, operativnim i ekonomskim mjerama. Važno je istaknuti mjere zračnih luka za redukciju buke kao što je, “policijski sat“, gradnja zvučnih barijera te korištenje (tiših) zrakoplova novih generacija.Throughout this final work many questions are analized about noise of commercial air traffic that affects humans and their health. Noise sources of commercial air traffic can be divided on propulsive noise and aircraft structure noise. International Regulations for aircraft noise decides different kinds of measures according to data that are being determined by measuring noise level. By 2050. European Union International Regulations are targeting to lower the noise level by 65%. ICAO (according to Annex 16 Volume 1) gives different methods of measuring and measures of noise reduction for all types of aircrafts. Also, all sorts of noise reduction are being described such as technological, operative and economical measures. It is important to notice airports measures for noise reduction such as curfew, building sound barriers and using quieter aircrafts of new generations

Low temperature growth technique for nanocrystalline cuprous oxide thin films using microwave plasma oxidation of copper

We report on the direct formation of phase pure nanocrystalline cuprous oxide (Cu2O) film with band gap ~ 2 eV by microwave plasma oxidation of pulsed dc magnetron sputtered Cu films and the highly controlled oxidation of Cu in to Cu2O and CuO phases by controlling the plasma exposure time. The structural, morphological and optoelectronic properties of the films were investigated. p-type Cu2O film with a grain size ~20-30 nm, resistivity of ~66 Ω cm and a hole concentration of ~2×1017 cm-3 is obtained for a plasma exposure time of 10 min without using any foreign dopants. The optical absorption coefficient (~105 cm-1) of the Cu2O film is also reported

Prevalence and factors associated with hypertension among rural community dwellers in a local government area, South West Nigeria

Background: Many African countries including Nigeria are said to be at various stages of an epidemiological transition from communicable to non-communicable diseases (NCD). Objective: This study determined the current pattern and correlates of hypertension among adults in some rural communities in South West Nigeria. Methods: It was a descriptive cross-sectional study of 1012 individuals across 16 rural communities. The respondents\u2019 blood pressure, weight, height and waist circumference were measured. Bivariate and multivariate analyses were done. Results: Among the participants, 461 (45.6%) had hypertension out of whom 217 (47.1%) and 244 (52.9%) had stage 1 and stage 2 hypertension respectively. The systolic, diastolic and mean arterial blood pressures increased with age. The significant predictors of hypertension were; increasing age (p<0.001), higher waist circumference (p = 0.01) and overweight / obesity (p = 0.03). While systolic blood pressure (SBP) had the strongest correlation with age, waist circumference (WC) was the strongest correlate of diastolic blood pressure (DBP). Conclusion: Despite being a rural population, there was a high prevalence of hypertension in the study area