TY  - CONF
AU  - Ajtić, Jelena
AU  - Maletić, Dimitrije
AU  - Stratimirović, Đorđe
AU  - Blesić, Suzana
AU  - Nikolić, Jelena
AU  - Đurđević, Vladimir S.
AU  - Todorović, Dragana
PY  - 2015
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1286
AB  - Dependence of the lead-210 activity concentration in surface air on meteorological variables and teleconnection indices is investigated using multivariate analysis, which gives the Boosted Decision Trees method as the most suitable for variable analysis. A mapped functional behaviour of the lead-210 activity concentration is further obtained, and used to test predictability of lead-210 in surface air. The results show an agreement between the predicted and measured values. The temporal evolution of the measured activities is satisfactorily matched by the prediction. The largest qualitative differences are obtained for winter months.
PB  - RAD Association
C3  - Rad 2015: The Third International Conference on Radiation and Applications in Various Fields of Rese
T1  - Predictability of lead-210 in surface air based on multivariate analysis
SP  - 317
EP  - 322
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_1286
ER  - 

@conference{
author = "Ajtić, Jelena and Maletić, Dimitrije and Stratimirović, Đorđe and Blesić, Suzana and Nikolić, Jelena and Đurđević, Vladimir S. and Todorović, Dragana",
year = "2015",
abstract = "Dependence of the lead-210 activity concentration in surface air on meteorological variables and teleconnection indices is investigated using multivariate analysis, which gives the Boosted Decision Trees method as the most suitable for variable analysis. A mapped functional behaviour of the lead-210 activity concentration is further obtained, and used to test predictability of lead-210 in surface air. The results show an agreement between the predicted and measured values. The temporal evolution of the measured activities is satisfactorily matched by the prediction. The largest qualitative differences are obtained for winter months.",
publisher = "RAD Association",
journal = "Rad 2015: The Third International Conference on Radiation and Applications in Various Fields of Rese",
title = "Predictability of lead-210 in surface air based on multivariate analysis",
pages = "317-322",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_1286"
}

Ajtić, J., Maletić, D., Stratimirović, Đ., Blesić, S., Nikolić, J., Đurđević, V. S.,& Todorović, D.. (2015). Predictability of lead-210 in surface air based on multivariate analysis. in Rad 2015: The Third International Conference on Radiation and Applications in Various Fields of Rese
RAD Association., 317-322.
https://hdl.handle.net/21.15107/rcub_veterinar_1286

Ajtić J, Maletić D, Stratimirović Đ, Blesić S, Nikolić J, Đurđević VS, Todorović D. Predictability of lead-210 in surface air based on multivariate analysis. in Rad 2015: The Third International Conference on Radiation and Applications in Various Fields of Rese. 2015;:317-322.
https://hdl.handle.net/21.15107/rcub_veterinar_1286 .

Ajtić, Jelena, Maletić, Dimitrije, Stratimirović, Đorđe, Blesić, Suzana, Nikolić, Jelena, Đurđević, Vladimir S., Todorović, Dragana, "Predictability of lead-210 in surface air based on multivariate analysis" in Rad 2015: The Third International Conference on Radiation and Applications in Various Fields of Rese (2015):317-322,
https://hdl.handle.net/21.15107/rcub_veterinar_1286 .

TY  - CONF
AU  - Maletić, Dimitrije
AU  - Ajtić, Jelena
AU  - Đurđević, V.
AU  - Todorović, Dragana
AU  - Nikolić, J.
AU  - Banjanac, R.
AU  - Udovičić, V.
PY  - 2014
UR  - https://vet-erinar.vet.bg.ac.rs/handle/123456789/1149
AB  - Activities of lead-210 and beryllium-7 have been monitored at the Vinča Institute of Nuclear Sciences in Belgrade, Serbia. The monthly mean activities in composite aerosol samples were determined on HPGe detectors by standard gamma spectrometry. The meteorological data, consisting of the temperature, atmospheric pressure, relative humidity, sunshine hours and cloud cover data were obtained from the European Climate Assessment & Dataset and the Republic Hydrometeorological Service of Serbia. Five teleconnection indices of large scale atmospheric circulation: North Atlantic Oscillation, East Atlantic Pattern, East Atlantic/West Russia Pattern, Scandinavia Pattern, and Polar/Eurasia Pattern were obtained from the data archive of the United States National Oceanic and Atmospheric Administration's Climate Prediction Center. The first lead-210 and beryllium-7 activities measured at the Vinča Institute date back to 1985 and 1991, respectively, and their relation with the climate variables and teleconnection indices is investigated using multivariate methods of analysis. The most appropriate multivariate method of analysis of these sets of measurements is selected from a wide spectrum of multivariate methods developed for data analysis in high-energy physics and implemented in the Toolkit for Multivariate Analysis software package. The evaluation ranking results based on the best signal efficiency and purity, show that the Boosted Decision Trees (BDT) multivariate method is the most suitable for the variable analysis. Further multivariate analysis results give insight into the dependence of lead-210 and beryllium-7 concentrations upon the climate variables and atmospheric circulation (via the teleconnection indices) during the time of measurements. The BDT method singles out the Scandinavia Pattern index as the variable with the highest importance for both radionuclides. Amongst the climate variables, temperature shows the strongest influence on the radionuclide concentrations, while relative humidity is the lowest ranking variable. Moreover, the multivariate regression methods give a good approximation of lead-210 and beryllium-7 concentrations for all the sets of climate variables and teleconnection indices.
PB  - RAD Association
C3  - RAD Conference Proceedings
T1  - Multivariate analysis of climate variables, teleconnection indices and activities of lead-210 and beryllium-7 in surface air in Belgrade, Serbia
SP  - 13
EP  - 16
UR  - https://hdl.handle.net/21.15107/rcub_veterinar_1149
ER  - 

@conference{
author = "Maletić, Dimitrije and Ajtić, Jelena and Đurđević, V. and Todorović, Dragana and Nikolić, J. and Banjanac, R. and Udovičić, V.",
year = "2014",
abstract = "Activities of lead-210 and beryllium-7 have been monitored at the Vinča Institute of Nuclear Sciences in Belgrade, Serbia. The monthly mean activities in composite aerosol samples were determined on HPGe detectors by standard gamma spectrometry. The meteorological data, consisting of the temperature, atmospheric pressure, relative humidity, sunshine hours and cloud cover data were obtained from the European Climate Assessment & Dataset and the Republic Hydrometeorological Service of Serbia. Five teleconnection indices of large scale atmospheric circulation: North Atlantic Oscillation, East Atlantic Pattern, East Atlantic/West Russia Pattern, Scandinavia Pattern, and Polar/Eurasia Pattern were obtained from the data archive of the United States National Oceanic and Atmospheric Administration's Climate Prediction Center. The first lead-210 and beryllium-7 activities measured at the Vinča Institute date back to 1985 and 1991, respectively, and their relation with the climate variables and teleconnection indices is investigated using multivariate methods of analysis. The most appropriate multivariate method of analysis of these sets of measurements is selected from a wide spectrum of multivariate methods developed for data analysis in high-energy physics and implemented in the Toolkit for Multivariate Analysis software package. The evaluation ranking results based on the best signal efficiency and purity, show that the Boosted Decision Trees (BDT) multivariate method is the most suitable for the variable analysis. Further multivariate analysis results give insight into the dependence of lead-210 and beryllium-7 concentrations upon the climate variables and atmospheric circulation (via the teleconnection indices) during the time of measurements. The BDT method singles out the Scandinavia Pattern index as the variable with the highest importance for both radionuclides. Amongst the climate variables, temperature shows the strongest influence on the radionuclide concentrations, while relative humidity is the lowest ranking variable. Moreover, the multivariate regression methods give a good approximation of lead-210 and beryllium-7 concentrations for all the sets of climate variables and teleconnection indices.",
publisher = "RAD Association",
journal = "RAD Conference Proceedings",
title = "Multivariate analysis of climate variables, teleconnection indices and activities of lead-210 and beryllium-7 in surface air in Belgrade, Serbia",
pages = "13-16",
url = "https://hdl.handle.net/21.15107/rcub_veterinar_1149"
}

Maletić, D., Ajtić, J., Đurđević, V., Todorović, D., Nikolić, J., Banjanac, R.,& Udovičić, V.. (2014). Multivariate analysis of climate variables, teleconnection indices and activities of lead-210 and beryllium-7 in surface air in Belgrade, Serbia. in RAD Conference Proceedings
RAD Association., 13-16.
https://hdl.handle.net/21.15107/rcub_veterinar_1149

Maletić D, Ajtić J, Đurđević V, Todorović D, Nikolić J, Banjanac R, Udovičić V. Multivariate analysis of climate variables, teleconnection indices and activities of lead-210 and beryllium-7 in surface air in Belgrade, Serbia. in RAD Conference Proceedings. 2014;:13-16.
https://hdl.handle.net/21.15107/rcub_veterinar_1149 .

Maletić, Dimitrije, Ajtić, Jelena, Đurđević, V., Todorović, Dragana, Nikolić, J., Banjanac, R., Udovičić, V., "Multivariate analysis of climate variables, teleconnection indices and activities of lead-210 and beryllium-7 in surface air in Belgrade, Serbia" in RAD Conference Proceedings (2014):13-16,
https://hdl.handle.net/21.15107/rcub_veterinar_1149 .