Mathmatics
(MDPI)
• 13 Jan 2022
Petrović, Milena J. • Valjarević, Dragana • Ilić, Dejan • Valjarević, Aleksandar • Mladenović, Julija
We propose an improved variant of the accelerated gradient optimization models for solving unconstrained minimization problems. Merging the positive features of either double direction, as well as double step size accelerated gradient models, we define an iterative method of a simpler form which is generally more effective. Performed convergence analysis shows that the defined iterative method is at least linearly convergent for uniformly convex and strictly convex functions. Numerical test resu ...
Proceedings XXIII YuCorr, International Conference Meeting Point Of The Science And Practice In The Fields Of Corrosion, Materials And Environmental Protection. May 16-19, 2022, Divčibare, Serbia. pp.229-234.
• 01 Apr 2024
Mitrovic, Marija • Lempic, Aleksandra • Gulan, Ljiljana
This paper presents the results of radon concentration in ground floor dwellings in the vicinity of the "Trepča" mine. Earlier studies on radon in the area of Kosovska Mitrovica have shown that there are dwellings with high values of this radioactive gas, which can be related to technological activities that can change the concentrations of natural radioactive materials in the environment. According to the World Health Organization, radon is the second leading cause of lung cancer after smoking. ...
Proceedings XXIII YuCorr, International Conference Meeting Point Of The Science And Practice In The Fields Of Corrosion, Materials And Environmental Protection. May 16-19, 2022, Divčibare, Serbia.pp.223-228
• 01 Apr 2024
Gulan, Ljiljana • Jovanović, Stanimirka • Mitrović, Marija • Stajić, Jelena M.
In this paper, the specific activities of radionuclides in ash and ambient dose equivalent rate of gamma radiation in the air in the vicinity of the thermal power plant (TPP) "Kosovo B", Obilić were measured. Five samples for determination the activity of radionuclides in the ash by gamma spectrometric method were taken from the ash dump of the TPP "Kosovo B". The specific activities of the radionuclide 226Ra in the ash are in the range of 9.5 ± 0.6 Bq/kg - 22.4 ± 0.8 Bq/kg. The specific activit ...
Zbornik radova XXXI Simpozijum DZZSCG, Beograd, 6-8. oktobar 2021
• 01 Apr 2024
Gulan, Ljiljana • Forkapić, Sofija • Spasić, Dušica • Živković Radovanović, Jelena • Vučković, Biljana • Hansman, Jan • Lakatoš, Robert
Visoke koncentracije radona zabeležene su u jednoj kući u naselju Rudare u blizini
rudarskog kompleksa “Trepča”. Ugljeni kanisteri izlagani po 48 sati u julu, novembru i
decembru 2019 pokazali su vrednosti koncentracije radona: 16273±162, 962±17,
144±7 Bq/m3, respektivno. Istovremeno sa ugljenim kanisterima koncentracija radona
merena je aktivnom metodom (RAD7 uređajem) u novembru (u ciklusu 11x1h), i
vrednosti su opadale od 2764±212 do 1449±104 Bq/m3. Specifične aktivnosti
radionuklida 22 ...
Zbornik radova XXXI Simpozijum DZZSCG, Beograd 6-8. oktobar 2021
• 01 Apr 2024
Spasić, Dušica • Gulan, Ljiljana
U ovom radu su prikazani rezultati merenja koncentracije radona u jednoj porodičnoj
kući u blizini Kosovske Mitrovice u periodu od 24.03.2020 – 31.05.2020. Interval
merenja je obuhvatio period proglašenja vanredne situacije izazvane pandemijom
COVID-19. Merenje koncentracije radona izvršeno je sa dva aktivna detektora radona
(Airthings Corentium Home) postavljena u dnevnoj i spavaćoj sobi kuće starosti preko
30 godina. Vrednosti koncentracija radona očitavane dnevno su se kretale u opsegu ...
XXXI Simpozijum DZZSCG, Beograd 6-8. oktobar 2021.
• 01 Apr 2024
Vučković, Biljana • Đokić, Boban • Todorović, Nataša • Nikolov, Jovana • Gulan, Ljiljana
Postojanje radona u vodi za pić e dovodi do unutrašnje izloženosti, direktno (kroz
procese radioaktivnog raspadanja, ingestije i inhalacije) i indirektno (kada se
kombinuju kao deo lanca ishrane). Merenje zastupljenosti radona u vodi za piće
pomaže da se proceni rizik od izloženosti zračenju prilikom svakodnevne potrošnje
vode. U ovom radu koncentracija aktivnosti radona u vodi sa alternativnih izvora
snabdevanja na teritoriji opštine Novo Brdo merena je alfa spektrometrijskom metodom
RA ...
XXXI Simpozijum DZZSCG, Beograd 6-8. oktobar 2021
• 01 Apr 2024
Gulan, Ljiljana • Leković, Milovan • Spasić, Dušica • Vučković, Biljana
Ради процене стања радиоактивности у животној средини, спроведена су
мерења јачине амбијенталног дозног еквивалента у ваздуху на територији града
Ваљева и околине. Истраживање је спроведено Гајгер-Милеровим бројачем модел
FS2011, у јуну 2021 на 40 локација. Мерења су вршена на земљи и на висини од 1 m
у урбаном, руралном и индустријском подручју. Током мерења забележени су
параметри температуре, влажности ваздуха и атмосферског притиска на
локацијама. Истражена је корелација између мерења ...
• 01 Apr 2024
Spasić, Dušica • Gulan, Ljiljana
People are mainly exposed to radon in indoor environments. Exposure to radon and its decay products is the second leading cause of lung cancer, and there is a strong synergistic effect with smoking. The most significant source of indoor radon is usually the soil around building; radon penetrates into houses directly from the soil through fractures and cracks. In some cases the source of higher radon could be household water from drilled wells or exhalation from building materials. In the Europea ...
Proceedings of The first international conference on sustainable environment and technologies “Create sustainable community”, Belgrade, 24-25 September, 2021.
• 01 Apr 2024
Gulan, Ljiljana • Spasić, Dušica • Drobac, Boris • Bačević, Nikola
This study deals with continuous radon monitoring conducted to estimate the relationship between indoor radon measurements and potential occurrences of earthquake in the Balkan region. Radon monitoring was performed with the detector Airthings Corentium Home placed in the basement office of faculty building in Kosovska Mitrovica (N 42.897°, E 20.867°) in winter period of the 2020/21 (four months in continuity). According to the European Seismic Hazard Map this region is classified as moderate ha ...
Eight International Conference on radiation and applications in various fields of research, RAD8, Virtual Conference, Herceg Novi, Montenegro, July 20-24, 2020.
• 01 Apr 2024
Vučković, Biljana • Todorović, Nataša • Nikolov, Jovana • Gulan, Ljiljana
In the present study, the water samples were taken from public fountains in rural area
municipality of Kuršumlija, in southern part of Serbia. Sampling of water from public fountains began subsequently according to establishment role and analyzed by alpha spectrometric method using the system (RAD7 RAD H2O) (DURRANGE Co.). Values of radon concentration in water ranged from 4.4 Bq l-1 to 22.4 Bq l-1, with mean value of 13.8 Bq l-1. As can be seen, the radon concentrations in water samples from t ...
