A new approach to foundational problems of quantum mechanics related to applications in quantum technologies and interpretations of signals of various origins

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A new approach to foundational problems of quantum mechanics related to applications in quantum technologies and interpretations of signals of various origins (en)
Нови приступ проблемима заснивања квантне механике са аспекта примене у квантним технологијама и интерпретацијама сигнала различитог порекла (sr)
Novi pristup problemima zasnivanja kvantne mehanike sa aspekta primene u kvantnim tehnologijama i interpretacijama signala različitog porekla (sr_RS)
Authors

Publications

Properties of the quantum state arising after the L-photon state has passed trough a linear quantum amplifier

Andreev, Vladimir A.; Davidović, Milena D.; Davidović, Ljubica D.; Davidović, Miloš D.; Davidović, Dragomir M.

(2021)

TY  - JOUR
AU  - Andreev, Vladimir A.
AU  - Davidović, Milena D.
AU  - Davidović, Ljubica D.
AU  - Davidović, Miloš D.
AU  - Davidović, Dragomir M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9164
AB  - We consider the system of N two-level atoms, of which N0 atoms are unexcited and N1 are excited. This system of N two-level atoms, which forms a linear quantum amplifier, interacts with a single-mode electromagnetic field. The problem of amplification of the L-photon states using such an amplifier is studied. The evolution of the electromagnetic field density matrix is described by the master equation for the field under amplification. The dynamics of this process is such that it can be described as the transformation of the scale of the phase space. The exact solution of the master equation is expressed using the transformed Husimi function of the L-quantum state of the harmonic oscillator. The properties of this function are studied and using it the average photon number and its fluctuations in the amplified state are found. © 2021, Editura Academiei Romane. All rights reserved.
T2  - Romanian Reports in Physics
T1  - Properties of the quantum state arising after the L-photon state has passed trough a linear quantum amplifier
VL  - 73
IS  - 1
SP  - 102
ER  - 
@article{
author = "Andreev, Vladimir A. and Davidović, Milena D. and Davidović, Ljubica D. and Davidović, Miloš D. and Davidović, Dragomir M.",
year = "2021",
abstract = "We consider the system of N two-level atoms, of which N0 atoms are unexcited and N1 are excited. This system of N two-level atoms, which forms a linear quantum amplifier, interacts with a single-mode electromagnetic field. The problem of amplification of the L-photon states using such an amplifier is studied. The evolution of the electromagnetic field density matrix is described by the master equation for the field under amplification. The dynamics of this process is such that it can be described as the transformation of the scale of the phase space. The exact solution of the master equation is expressed using the transformed Husimi function of the L-quantum state of the harmonic oscillator. The properties of this function are studied and using it the average photon number and its fluctuations in the amplified state are found. © 2021, Editura Academiei Romane. All rights reserved.",
journal = "Romanian Reports in Physics",
title = "Properties of the quantum state arising after the L-photon state has passed trough a linear quantum amplifier",
volume = "73",
number = "1",
pages = "102"
}
Andreev, V. A., Davidović, M. D., Davidović, L. D., Davidović, M. D.,& Davidović, D. M.. (2021). Properties of the quantum state arising after the L-photon state has passed trough a linear quantum amplifier. in Romanian Reports in Physics, 73(1), 102.
Andreev VA, Davidović MD, Davidović LD, Davidović MD, Davidović DM. Properties of the quantum state arising after the L-photon state has passed trough a linear quantum amplifier. in Romanian Reports in Physics. 2021;73(1):102..
Andreev, Vladimir A., Davidović, Milena D., Davidović, Ljubica D., Davidović, Miloš D., Davidović, Dragomir M., "Properties of the quantum state arising after the L-photon state has passed trough a linear quantum amplifier" in Romanian Reports in Physics, 73, no. 1 (2021):102.
1

In search of an optimal in-field calibration method of low-cost gas sensors for ambient air pollutants: Comparison of linear, multilinear and artificial neural network approaches

Topalović, Dušan; Davidović, Miloš D.; Jovanović, Maja; Bartonova, Alena; Ristovski, Zoran; Jovašević-Stojanović, Milena

(2019)

TY  - JOUR
AU  - Topalović, Dušan
AU  - Davidović, Miloš D.
AU  - Jovanović, Maja
AU  - Bartonova, Alena
AU  - Ristovski, Zoran
AU  - Jovašević-Stojanović, Milena
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8372
AB  - The current compliance networks of automatic air-quality monitoring stations in large urban environments are not sufficient to provide spatial and temporal measurement resolution for realistic assessment of personal exposure to pollutants. Small low-cost sensor platforms with greater mobility and expected lower maintenance costs, are increasingly being used as a supplement to compliance monitoring stations. However, low-cost sensor platforms usually provide data with uncertain precision. To improve the precision, these sensor platforms require in-field calibration. Our paper aims to demonstrate that data from each individual sensor system can be corrected using that sensor system's own data to achieve much improved data quality compared to a reference. However, in this procedure, there are practical difficulties such as individual sensor outputs from the multi-sensor system not being sufficiently available due to malfunctions for instance. We explore how this can be dealt with. In our opinion, this is a novel approach, of practical importance both to users and manufacturers. We present a detailed comparative analysis of Linear Regression (univariate), Multivariate Linear Regression and Artificial Neural Networks used with a specific aim of calibrating field-deployed low-cost CO and O3 sensors. For Artificial Neural Network models, the performance of three common training algorithms was compared (Levenberg-Marquardt, Resilient back-propagation and Conjugate Gradient Powell-Beale algorithm). Data for this study were obtained from two campaigns conducted with 25 multi-sensor AQMESH v.3.5 platforms used within the activities of the CITI-SENSE project. The platforms were co-located to reference gas monitors at the Automatic Monitoring Station Stari Grad, in Belgrade, Serbia. This paper demonstrates that Multivariate Linear Regression and Artificial Neural Network calibration models can improve the output signal. This improvement can be measured by changes in the median and interquartile ranges of statistical parameters used for model evaluation. Artificial Neural Networks showed the best results compared to Linear Regression and Multivariate Linear Regression models. The best predictors for CO, in addition to CO low-cost sensor data, were PM2.5 and NO2, while for O3, in addition to O3 low-cost sensor data, the most suitable input predictors were NO and aH. Based on residual error analysis, we have shown that for CO and O3, a certain range of concentrations exists in which calibrated values differ by less than 10% from the reference method results. In addition, it was noted that for all models, CO sensors consistently showed lower variability between platforms compared to O3 sensors. © 2019 Elsevier Ltd
T2  - Atmospheric Environment
T1  - In search of an optimal in-field calibration method of low-cost gas sensors for ambient air pollutants: Comparison of linear, multilinear and artificial neural network approaches
VL  - 213
SP  - 640
EP  - 658
DO  - 10.1016/j.atmosenv.2019.06.028
ER  - 
@article{
author = "Topalović, Dušan and Davidović, Miloš D. and Jovanović, Maja and Bartonova, Alena and Ristovski, Zoran and Jovašević-Stojanović, Milena",
year = "2019",
abstract = "The current compliance networks of automatic air-quality monitoring stations in large urban environments are not sufficient to provide spatial and temporal measurement resolution for realistic assessment of personal exposure to pollutants. Small low-cost sensor platforms with greater mobility and expected lower maintenance costs, are increasingly being used as a supplement to compliance monitoring stations. However, low-cost sensor platforms usually provide data with uncertain precision. To improve the precision, these sensor platforms require in-field calibration. Our paper aims to demonstrate that data from each individual sensor system can be corrected using that sensor system's own data to achieve much improved data quality compared to a reference. However, in this procedure, there are practical difficulties such as individual sensor outputs from the multi-sensor system not being sufficiently available due to malfunctions for instance. We explore how this can be dealt with. In our opinion, this is a novel approach, of practical importance both to users and manufacturers. We present a detailed comparative analysis of Linear Regression (univariate), Multivariate Linear Regression and Artificial Neural Networks used with a specific aim of calibrating field-deployed low-cost CO and O3 sensors. For Artificial Neural Network models, the performance of three common training algorithms was compared (Levenberg-Marquardt, Resilient back-propagation and Conjugate Gradient Powell-Beale algorithm). Data for this study were obtained from two campaigns conducted with 25 multi-sensor AQMESH v.3.5 platforms used within the activities of the CITI-SENSE project. The platforms were co-located to reference gas monitors at the Automatic Monitoring Station Stari Grad, in Belgrade, Serbia. This paper demonstrates that Multivariate Linear Regression and Artificial Neural Network calibration models can improve the output signal. This improvement can be measured by changes in the median and interquartile ranges of statistical parameters used for model evaluation. Artificial Neural Networks showed the best results compared to Linear Regression and Multivariate Linear Regression models. The best predictors for CO, in addition to CO low-cost sensor data, were PM2.5 and NO2, while for O3, in addition to O3 low-cost sensor data, the most suitable input predictors were NO and aH. Based on residual error analysis, we have shown that for CO and O3, a certain range of concentrations exists in which calibrated values differ by less than 10% from the reference method results. In addition, it was noted that for all models, CO sensors consistently showed lower variability between platforms compared to O3 sensors. © 2019 Elsevier Ltd",
journal = "Atmospheric Environment",
title = "In search of an optimal in-field calibration method of low-cost gas sensors for ambient air pollutants: Comparison of linear, multilinear and artificial neural network approaches",
volume = "213",
pages = "640-658",
doi = "10.1016/j.atmosenv.2019.06.028"
}
Topalović, D., Davidović, M. D., Jovanović, M., Bartonova, A., Ristovski, Z.,& Jovašević-Stojanović, M.. (2019). In search of an optimal in-field calibration method of low-cost gas sensors for ambient air pollutants: Comparison of linear, multilinear and artificial neural network approaches. in Atmospheric Environment, 213, 640-658.
https://doi.org/10.1016/j.atmosenv.2019.06.028
Topalović D, Davidović MD, Jovanović M, Bartonova A, Ristovski Z, Jovašević-Stojanović M. In search of an optimal in-field calibration method of low-cost gas sensors for ambient air pollutants: Comparison of linear, multilinear and artificial neural network approaches. in Atmospheric Environment. 2019;213:640-658.
doi:10.1016/j.atmosenv.2019.06.028 .
Topalović, Dušan, Davidović, Miloš D., Jovanović, Maja, Bartonova, Alena, Ristovski, Zoran, Jovašević-Stojanović, Milena, "In search of an optimal in-field calibration method of low-cost gas sensors for ambient air pollutants: Comparison of linear, multilinear and artificial neural network approaches" in Atmospheric Environment, 213 (2019):640-658,
https://doi.org/10.1016/j.atmosenv.2019.06.028 . .
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Linear Light Amplifier and Amplification of N-Photon States

Andreev, Vladimir A.; Davidović, Milena D.; Davidović, Ljubica D.; Davidović, Miloš D.; Davidović, Dragomir M.

(2019)

TY  - JOUR
AU  - Andreev, Vladimir A.
AU  - Davidović, Milena D.
AU  - Davidović, Ljubica D.
AU  - Davidović, Miloš D.
AU  - Davidović, Dragomir M.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8628
AB  - We consider a linear quantum amplifier consisting of NA two-level atoms and study the problem of amplification of N-photon states. The N-photon states are associated with N-quantum states of the harmonic oscillator. We show that the process of interaction of the electromagnetic field with atoms can be associated with some transformation of the phase space and functions defined on this phase space. We consider the Husimi functions QN(q, p) of N-quantum states of the harmonic oscillator, which are defined on the phase space, investigate transformation of these functions, and find an explicit form of the density matrix of the amplified N-photon state. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
T2  - Journal of Russian Laser Research
T1  - Linear Light Amplifier and Amplification of N-Photon States
VL  - 40
IS  - 4
SP  - 321
EP  - 327
DO  - 10.1007/s10946-019-09807-2
ER  - 
@article{
author = "Andreev, Vladimir A. and Davidović, Milena D. and Davidović, Ljubica D. and Davidović, Miloš D. and Davidović, Dragomir M.",
year = "2019",
abstract = "We consider a linear quantum amplifier consisting of NA two-level atoms and study the problem of amplification of N-photon states. The N-photon states are associated with N-quantum states of the harmonic oscillator. We show that the process of interaction of the electromagnetic field with atoms can be associated with some transformation of the phase space and functions defined on this phase space. We consider the Husimi functions QN(q, p) of N-quantum states of the harmonic oscillator, which are defined on the phase space, investigate transformation of these functions, and find an explicit form of the density matrix of the amplified N-photon state. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.",
journal = "Journal of Russian Laser Research",
title = "Linear Light Amplifier and Amplification of N-Photon States",
volume = "40",
number = "4",
pages = "321-327",
doi = "10.1007/s10946-019-09807-2"
}
Andreev, V. A., Davidović, M. D., Davidović, L. D., Davidović, M. D.,& Davidović, D. M.. (2019). Linear Light Amplifier and Amplification of N-Photon States. in Journal of Russian Laser Research, 40(4), 321-327.
https://doi.org/10.1007/s10946-019-09807-2
Andreev VA, Davidović MD, Davidović LD, Davidović MD, Davidović DM. Linear Light Amplifier and Amplification of N-Photon States. in Journal of Russian Laser Research. 2019;40(4):321-327.
doi:10.1007/s10946-019-09807-2 .
Andreev, Vladimir A., Davidović, Milena D., Davidović, Ljubica D., Davidović, Miloš D., Davidović, Dragomir M., "Linear Light Amplifier and Amplification of N-Photon States" in Journal of Russian Laser Research, 40, no. 4 (2019):321-327,
https://doi.org/10.1007/s10946-019-09807-2 . .
1
1
1

Spatial solitary like weak probe wave in the three-level Λ-type atoms

Stevanović, Ljiljana; Maluckov, Aleksandra; Filipović, Nikola; Pavlović, Vladan

(2019)

TY  - CONF
AU  - Stevanović, Ljiljana
AU  - Maluckov, Aleksandra
AU  - Filipović, Nikola
AU  - Pavlović, Vladan
PY  - 2019
UR  - http://aip.scitation.org/doi/abs/10.1063/1.5091159
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8094
AB  - We study the interaction of the medium composed of three-level atoms in A configuration interacting with two laser fields: weak probe field and strong control field. The probe field enters the medium under a certain angle, and it is initially in the form of the spatial soliton, while the control field is periodically modulated. The system of optical Bloch equations is analytically solved in the stationary regime by the perturbation method in order to obtain linear and third-order nonlinear susceptibility of the medium with respect to the probe field. After a straightforward algebraic procedure, using the approximation of the slow-varying field envelope, the nonlinear Schrödinger equation for the probe field is obtained. It is numerically solved by applying the spectral Fourier split-step method. It is found that, for properly chosen values of the probe and control field detunings and control Rabi frequency, the probe field behaves as a solitary wave whose direction does not depend on the incident angle. Moreover, the regime consisting of Bloch-like oscillations can be identified. The simulation is performed by choosing the corresponding levels of Mg atoms. © 2019 Author(s).
C3  - AIP Conference Proceedings
T1  - Spatial solitary like weak probe wave in the three-level Λ-type atoms
VL  - 2075
SP  - 030015
DO  - 10.1063/1.5091159
ER  - 
@conference{
author = "Stevanović, Ljiljana and Maluckov, Aleksandra and Filipović, Nikola and Pavlović, Vladan",
year = "2019",
abstract = "We study the interaction of the medium composed of three-level atoms in A configuration interacting with two laser fields: weak probe field and strong control field. The probe field enters the medium under a certain angle, and it is initially in the form of the spatial soliton, while the control field is periodically modulated. The system of optical Bloch equations is analytically solved in the stationary regime by the perturbation method in order to obtain linear and third-order nonlinear susceptibility of the medium with respect to the probe field. After a straightforward algebraic procedure, using the approximation of the slow-varying field envelope, the nonlinear Schrödinger equation for the probe field is obtained. It is numerically solved by applying the spectral Fourier split-step method. It is found that, for properly chosen values of the probe and control field detunings and control Rabi frequency, the probe field behaves as a solitary wave whose direction does not depend on the incident angle. Moreover, the regime consisting of Bloch-like oscillations can be identified. The simulation is performed by choosing the corresponding levels of Mg atoms. © 2019 Author(s).",
journal = "AIP Conference Proceedings",
title = "Spatial solitary like weak probe wave in the three-level Λ-type atoms",
volume = "2075",
pages = "030015",
doi = "10.1063/1.5091159"
}
Stevanović, L., Maluckov, A., Filipović, N.,& Pavlović, V.. (2019). Spatial solitary like weak probe wave in the three-level Λ-type atoms. in AIP Conference Proceedings, 2075, 030015.
https://doi.org/10.1063/1.5091159
Stevanović L, Maluckov A, Filipović N, Pavlović V. Spatial solitary like weak probe wave in the three-level Λ-type atoms. in AIP Conference Proceedings. 2019;2075:030015.
doi:10.1063/1.5091159 .
Stevanović, Ljiljana, Maluckov, Aleksandra, Filipović, Nikola, Pavlović, Vladan, "Spatial solitary like weak probe wave in the three-level Λ-type atoms" in AIP Conference Proceedings, 2075 (2019):030015,
https://doi.org/10.1063/1.5091159 . .

Trajectory-Based Interpretation of Laser Light Diffraction by a Sharp Edge

Davidović, Milena D.; Davidović, Miloš D.; Sanz, Angel S.; Božić, Mirjana; Vasiljević, Darko

(2018)

TY  - JOUR
AU  - Davidović, Milena D.
AU  - Davidović, Miloš D.
AU  - Sanz, Angel S.
AU  - Božić, Mirjana
AU  - Vasiljević, Darko
PY  - 2018
UR  - http://link.springer.com/10.1007/s10946-018-9738-9
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7965
AB  - In the diffraction pattern produced by a half-plane sharp edge when it obstructs the passage of a laser beam, two characteristic regions are noticeable. There is a central region, where the diffraction of laser light appears in the region of geometric shadow, while intensity oscillations are observed in the non-obstructed area. On both sides of the edge, there are also very long light traces along the normal to the edge of the obstacle. The theoretical explanation of this phenomenon is based on the Fresnel–Kirchhoff diffraction theory applied to the Gaussian beam propagation behind the obstacle. In this paper, we supplement this explanation by considering electromagnetic flow lines, which provide a more complete interpretation of the phenomenon in terms of electric and magnetic fields and flux lines; at the same time, that can be related to average photon paths. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
T2  - Journal of Russian Laser Research
T1  - Trajectory-Based Interpretation of Laser Light Diffraction by a Sharp Edge
VL  - 39
IS  - 5
SP  - 438
EP  - 447
DO  - 10.1007/s10946-018-9738-9
ER  - 
@article{
author = "Davidović, Milena D. and Davidović, Miloš D. and Sanz, Angel S. and Božić, Mirjana and Vasiljević, Darko",
year = "2018",
abstract = "In the diffraction pattern produced by a half-plane sharp edge when it obstructs the passage of a laser beam, two characteristic regions are noticeable. There is a central region, where the diffraction of laser light appears in the region of geometric shadow, while intensity oscillations are observed in the non-obstructed area. On both sides of the edge, there are also very long light traces along the normal to the edge of the obstacle. The theoretical explanation of this phenomenon is based on the Fresnel–Kirchhoff diffraction theory applied to the Gaussian beam propagation behind the obstacle. In this paper, we supplement this explanation by considering electromagnetic flow lines, which provide a more complete interpretation of the phenomenon in terms of electric and magnetic fields and flux lines; at the same time, that can be related to average photon paths. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.",
journal = "Journal of Russian Laser Research",
title = "Trajectory-Based Interpretation of Laser Light Diffraction by a Sharp Edge",
volume = "39",
number = "5",
pages = "438-447",
doi = "10.1007/s10946-018-9738-9"
}
Davidović, M. D., Davidović, M. D., Sanz, A. S., Božić, M.,& Vasiljević, D.. (2018). Trajectory-Based Interpretation of Laser Light Diffraction by a Sharp Edge. in Journal of Russian Laser Research, 39(5), 438-447.
https://doi.org/10.1007/s10946-018-9738-9
Davidović MD, Davidović MD, Sanz AS, Božić M, Vasiljević D. Trajectory-Based Interpretation of Laser Light Diffraction by a Sharp Edge. in Journal of Russian Laser Research. 2018;39(5):438-447.
doi:10.1007/s10946-018-9738-9 .
Davidović, Milena D., Davidović, Miloš D., Sanz, Angel S., Božić, Mirjana, Vasiljević, Darko, "Trajectory-Based Interpretation of Laser Light Diffraction by a Sharp Edge" in Journal of Russian Laser Research, 39, no. 5 (2018):438-447,
https://doi.org/10.1007/s10946-018-9738-9 . .
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2
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2

Compilation of errors in nuclear parameters for radionuclide Eu-152

Jordanov, Dragana; Nađđerđ, Laslo; Rosić, Milena

(2018)

TY  - JOUR
AU  - Jordanov, Dragana
AU  - Nađđerđ, Laslo
AU  - Rosić, Milena
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0168900218305904
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7713
AB  - Certain irregularities have been observed in the formation of probability matrices when applying our method for calculating the coincident summing effects occurringin the gamma spectroscopy of radionuclides. They have to do with the fact that, at certain energy levels, transition intensities are not balanced. As this affects the accuracy of our calculation, we have examined the source of those irregularities. This paper presents comments on the evaluation of the152Eu decay data. The paper offers an analysis of the errors and mistakes that the evaluators have made, in order to facilitate the future work in gamma spectroscopy.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
T1  - Compilation of errors in nuclear parameters for radionuclide Eu-152
VL  - 899
SP  - 49
EP  - 51
DO  - 10.1016/j.nima.2018.05.005
ER  - 
@article{
author = "Jordanov, Dragana and Nađđerđ, Laslo and Rosić, Milena",
year = "2018",
abstract = "Certain irregularities have been observed in the formation of probability matrices when applying our method for calculating the coincident summing effects occurringin the gamma spectroscopy of radionuclides. They have to do with the fact that, at certain energy levels, transition intensities are not balanced. As this affects the accuracy of our calculation, we have examined the source of those irregularities. This paper presents comments on the evaluation of the152Eu decay data. The paper offers an analysis of the errors and mistakes that the evaluators have made, in order to facilitate the future work in gamma spectroscopy.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
title = "Compilation of errors in nuclear parameters for radionuclide Eu-152",
volume = "899",
pages = "49-51",
doi = "10.1016/j.nima.2018.05.005"
}
Jordanov, D., Nađđerđ, L.,& Rosić, M.. (2018). Compilation of errors in nuclear parameters for radionuclide Eu-152. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 899, 49-51.
https://doi.org/10.1016/j.nima.2018.05.005
Jordanov D, Nađđerđ L, Rosić M. Compilation of errors in nuclear parameters for radionuclide Eu-152. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2018;899:49-51.
doi:10.1016/j.nima.2018.05.005 .
Jordanov, Dragana, Nađđerđ, Laslo, Rosić, Milena, "Compilation of errors in nuclear parameters for radionuclide Eu-152" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 899 (2018):49-51,
https://doi.org/10.1016/j.nima.2018.05.005 . .
1

An improved method of lifetime measurement of nuclei in radioactive decay chain

Puzovic, J. M.; Manic, D.; Nađđerđ, Laslo

(2017)

TY  - JOUR
AU  - Puzovic, J. M.
AU  - Manic, D.
AU  - Nađđerđ, Laslo
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1440
AB  - We present an improved statistical method for the calculation of mean lifetime of nuclei in a decay chain with an uncertain relation between mother and daughter nuclei. The method is based on the formation of time distribution of intervals between mother and daughter nuclei, without trying to set the exact mother-daughter nuclei relationship. If there is a coincidence of mother and daughter nuclei decays, the sum of these distributions has flat term on which an exponential term is superimposed. Parameters of this exponential function allow lifetime of daughter nucleus to be extracted. The method is tested on Monte Carlo simulation data.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - An improved method of lifetime measurement of nuclei in radioactive decay chain
VL  - 850
SP  - 68
EP  - 71
DO  - 10.1016/j.nima.2017.01.004
ER  - 
@article{
author = "Puzovic, J. M. and Manic, D. and Nađđerđ, Laslo",
year = "2017",
abstract = "We present an improved statistical method for the calculation of mean lifetime of nuclei in a decay chain with an uncertain relation between mother and daughter nuclei. The method is based on the formation of time distribution of intervals between mother and daughter nuclei, without trying to set the exact mother-daughter nuclei relationship. If there is a coincidence of mother and daughter nuclei decays, the sum of these distributions has flat term on which an exponential term is superimposed. Parameters of this exponential function allow lifetime of daughter nucleus to be extracted. The method is tested on Monte Carlo simulation data.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "An improved method of lifetime measurement of nuclei in radioactive decay chain",
volume = "850",
pages = "68-71",
doi = "10.1016/j.nima.2017.01.004"
}
Puzovic, J. M., Manic, D.,& Nađđerđ, L.. (2017). An improved method of lifetime measurement of nuclei in radioactive decay chain. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 850, 68-71.
https://doi.org/10.1016/j.nima.2017.01.004
Puzovic JM, Manic D, Nađđerđ L. An improved method of lifetime measurement of nuclei in radioactive decay chain. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2017;850:68-71.
doi:10.1016/j.nima.2017.01.004 .
Puzovic, J. M., Manic, D., Nađđerđ, Laslo, "An improved method of lifetime measurement of nuclei in radioactive decay chain" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 850 (2017):68-71,
https://doi.org/10.1016/j.nima.2017.01.004 . .
2
1
1
1

Measurement of the life-times distribution of Po-216

Nađđerđ, Laslo; Subotić, Krunoslav M.; Tsyganov, Yu. S.; Puzovic, J. M.; Polyakov, A. N.; Rykhlyuk, A. V.; Manic, D.

(2017)

TY  - JOUR
AU  - Nađđerđ, Laslo
AU  - Subotić, Krunoslav M.
AU  - Tsyganov, Yu. S.
AU  - Puzovic, J. M.
AU  - Polyakov, A. N.
AU  - Rykhlyuk, A. V.
AU  - Manic, D.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1699
AB  - The life time distribution measurements of the alpha emitter Po-216 have been performed with semiconductor detectors. We applied a new method to obtain the distribution of time intervals between the correlated signals of decay of the Po-216. The deduced half-life of Po-216 was found to be 144.0(6) ms, supporting the earlier published measurements and with an uncertainty much lower than any other previously reported value. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - Measurement of the life-times distribution of Po-216
VL  - 868
SP  - 119
EP  - 121
DO  - 10.1016/j.nima.2017.06.055
ER  - 
@article{
author = "Nađđerđ, Laslo and Subotić, Krunoslav M. and Tsyganov, Yu. S. and Puzovic, J. M. and Polyakov, A. N. and Rykhlyuk, A. V. and Manic, D.",
year = "2017",
abstract = "The life time distribution measurements of the alpha emitter Po-216 have been performed with semiconductor detectors. We applied a new method to obtain the distribution of time intervals between the correlated signals of decay of the Po-216. The deduced half-life of Po-216 was found to be 144.0(6) ms, supporting the earlier published measurements and with an uncertainty much lower than any other previously reported value. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "Measurement of the life-times distribution of Po-216",
volume = "868",
pages = "119-121",
doi = "10.1016/j.nima.2017.06.055"
}
Nađđerđ, L., Subotić, K. M., Tsyganov, Yu. S., Puzovic, J. M., Polyakov, A. N., Rykhlyuk, A. V.,& Manic, D.. (2017). Measurement of the life-times distribution of Po-216. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 868, 119-121.
https://doi.org/10.1016/j.nima.2017.06.055
Nađđerđ L, Subotić KM, Tsyganov YS, Puzovic JM, Polyakov AN, Rykhlyuk AV, Manic D. Measurement of the life-times distribution of Po-216. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2017;868:119-121.
doi:10.1016/j.nima.2017.06.055 .
Nađđerđ, Laslo, Subotić, Krunoslav M., Tsyganov, Yu. S., Puzovic, J. M., Polyakov, A. N., Rykhlyuk, A. V., Manic, D., "Measurement of the life-times distribution of Po-216" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 868 (2017):119-121,
https://doi.org/10.1016/j.nima.2017.06.055 . .
2
4
3

Scale Transformations in Phase Space and Stretched States of a Harmonic Oscillator

Andreev, V. A.; Davidovic, D. M.; Davidovic, L. D.; Davidović, Milena D.; Davidović, Miloš D.

(2017)

TY  - JOUR
AU  - Andreev, V. A.
AU  - Davidovic, D. M.
AU  - Davidovic, L. D.
AU  - Davidović, Milena D.
AU  - Davidović, Miloš D.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1685
AB  - We consider scale transformations (q, p) - GT (lambda q, lambda p) in phase space. They induce transformations of the Husimi functions H(q, p) defined in this space. We consider the Husimi functions for states that are arbitrary superpositions of n-particle states of a harmonic oscillator. We develop a method that allows finding so-called stretched states to which these superpositions transform under such a scale transformation. We study the properties of the stretched states and calculate their density matrices in explicit form. We establish that the density matrix structure can be described using negative binomial distributions. We find expressions for the energy and entropy of stretched states and calculate the means of the number-ofstates operator. We give the form of the Heisenberg and Robertson-Schrodinger uncertainty relations for stretched states.
T2  - Theoretical and Mathematical Physics
T1  - Scale Transformations in Phase Space and Stretched States of a Harmonic Oscillator
VL  - 192
IS  - 1
SP  - 1080
EP  - 1096
DO  - 10.1134/S0040577917070091
ER  - 
@article{
author = "Andreev, V. A. and Davidovic, D. M. and Davidovic, L. D. and Davidović, Milena D. and Davidović, Miloš D.",
year = "2017",
abstract = "We consider scale transformations (q, p) - GT (lambda q, lambda p) in phase space. They induce transformations of the Husimi functions H(q, p) defined in this space. We consider the Husimi functions for states that are arbitrary superpositions of n-particle states of a harmonic oscillator. We develop a method that allows finding so-called stretched states to which these superpositions transform under such a scale transformation. We study the properties of the stretched states and calculate their density matrices in explicit form. We establish that the density matrix structure can be described using negative binomial distributions. We find expressions for the energy and entropy of stretched states and calculate the means of the number-ofstates operator. We give the form of the Heisenberg and Robertson-Schrodinger uncertainty relations for stretched states.",
journal = "Theoretical and Mathematical Physics",
title = "Scale Transformations in Phase Space and Stretched States of a Harmonic Oscillator",
volume = "192",
number = "1",
pages = "1080-1096",
doi = "10.1134/S0040577917070091"
}
Andreev, V. A., Davidovic, D. M., Davidovic, L. D., Davidović, M. D.,& Davidović, M. D.. (2017). Scale Transformations in Phase Space and Stretched States of a Harmonic Oscillator. in Theoretical and Mathematical Physics, 192(1), 1080-1096.
https://doi.org/10.1134/S0040577917070091
Andreev VA, Davidovic DM, Davidovic LD, Davidović MD, Davidović MD. Scale Transformations in Phase Space and Stretched States of a Harmonic Oscillator. in Theoretical and Mathematical Physics. 2017;192(1):1080-1096.
doi:10.1134/S0040577917070091 .
Andreev, V. A., Davidovic, D. M., Davidovic, L. D., Davidović, Milena D., Davidović, Miloš D., "Scale Transformations in Phase Space and Stretched States of a Harmonic Oscillator" in Theoretical and Mathematical Physics, 192, no. 1 (2017):1080-1096,
https://doi.org/10.1134/S0040577917070091 . .
1
1
3

The application of the new matrix method for calculating coincidence summing effects in the case of radionuclide with the more complex decay scheme-Eu-152

Jordanov, Dragana; Nađđerđ, Laslo; Puzovic, Jovan; Rosić, Milena; Kokunešoski, Maja

(2016)

TY  - JOUR
AU  - Jordanov, Dragana
AU  - Nađđerđ, Laslo
AU  - Puzovic, Jovan
AU  - Rosić, Milena
AU  - Kokunešoski, Maja
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1277
AB  - In this paper we present the results of applying the new approach for calculating coincidence summing effects. The application of analytical approaches to coincidence summing effects makes it possible to predict all summation peaks that occur in the spectrum. Accordingly, based on the value of the peak area in the spectrum and knowledge of probability transitions between excited states of a nucleus, it is possible to determine the efficiency of detection and activity of radioactive sources. This method is successfully applied to the decay of the radionuclide europium Eu-152. It provides a detailed description of the method of forming the matrix corresponding to the final result - determined activities and the efficiency of detection. The importance of the new method is that it allows us to determine the efficiency of detection and activity of radioactive sources directly without calibration of the detector, which is very important in metrology of radionuclides. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - The application of the new matrix method for calculating coincidence summing effects in the case of radionuclide with the more complex decay scheme-Eu-152
VL  - 836
SP  - 22
EP  - 29
DO  - 10.1016/j.nima.2016.08.008
ER  - 
@article{
author = "Jordanov, Dragana and Nađđerđ, Laslo and Puzovic, Jovan and Rosić, Milena and Kokunešoski, Maja",
year = "2016",
abstract = "In this paper we present the results of applying the new approach for calculating coincidence summing effects. The application of analytical approaches to coincidence summing effects makes it possible to predict all summation peaks that occur in the spectrum. Accordingly, based on the value of the peak area in the spectrum and knowledge of probability transitions between excited states of a nucleus, it is possible to determine the efficiency of detection and activity of radioactive sources. This method is successfully applied to the decay of the radionuclide europium Eu-152. It provides a detailed description of the method of forming the matrix corresponding to the final result - determined activities and the efficiency of detection. The importance of the new method is that it allows us to determine the efficiency of detection and activity of radioactive sources directly without calibration of the detector, which is very important in metrology of radionuclides. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "The application of the new matrix method for calculating coincidence summing effects in the case of radionuclide with the more complex decay scheme-Eu-152",
volume = "836",
pages = "22-29",
doi = "10.1016/j.nima.2016.08.008"
}
Jordanov, D., Nađđerđ, L., Puzovic, J., Rosić, M.,& Kokunešoski, M.. (2016). The application of the new matrix method for calculating coincidence summing effects in the case of radionuclide with the more complex decay scheme-Eu-152. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 836, 22-29.
https://doi.org/10.1016/j.nima.2016.08.008
Jordanov D, Nađđerđ L, Puzovic J, Rosić M, Kokunešoski M. The application of the new matrix method for calculating coincidence summing effects in the case of radionuclide with the more complex decay scheme-Eu-152. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2016;836:22-29.
doi:10.1016/j.nima.2016.08.008 .
Jordanov, Dragana, Nađđerđ, Laslo, Puzovic, Jovan, Rosić, Milena, Kokunešoski, Maja, "The application of the new matrix method for calculating coincidence summing effects in the case of radionuclide with the more complex decay scheme-Eu-152" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 836 (2016):22-29,
https://doi.org/10.1016/j.nima.2016.08.008 . .
1
4
4
3

Scaling Transform and Stretched States in Quantum Mechanics

Andreev, Vladimir A.; Davidović, Dragomir M.; Davidović, Ljubica D.; Davidović, Milena D.; Davidović, Miloš D.; Zotov, Sergey D.

(2016)

TY  - JOUR
AU  - Andreev, Vladimir A.
AU  - Davidović, Dragomir M.
AU  - Davidović, Ljubica D.
AU  - Davidović, Milena D.
AU  - Davidović, Miloš D.
AU  - Zotov, Sergey D.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1310
AB  - We consider the Husimi Q(q, p)-functions which are quantum quasiprobability distributions on the phase space. It is known that, under a scaling transform (q; p) - GT (aiiq; aiip), the Husimi function of any physical state is converted into a function which is also the Husimi function of some physical state. More precisely, it has been proved that, if Q(q, p) is the Husimi function, the function aii(2) Q(aiiq; aiip) is also the Husimi function. We call a state with the Husimi function aii(2) Q(aiiq; aiip) the stretched state and investigate the properties of the stretched Fock states. These states can be obtained as a result of applying the scaling transform to the Fock states of the harmonic oscillator. The harmonic-oscillator Fock states are pure states, but the stretched Fock states are mixed states. We find the density matrices of stretched Fock states in an explicit form. Their structure can be described with the help of negative binomial distributions. We present the graphs of distributions of negative binomial coefficients for different stretched Fock states and show the von Neumann entropy of the simplest stretched Fock state.
T2  - Journal of Russian Laser Research
T1  - Scaling Transform and Stretched States in Quantum Mechanics
VL  - 37
IS  - 5
SP  - 434
EP  - 439
DO  - 10.1007/s10946-016-9594-4
ER  - 
@article{
author = "Andreev, Vladimir A. and Davidović, Dragomir M. and Davidović, Ljubica D. and Davidović, Milena D. and Davidović, Miloš D. and Zotov, Sergey D.",
year = "2016",
abstract = "We consider the Husimi Q(q, p)-functions which are quantum quasiprobability distributions on the phase space. It is known that, under a scaling transform (q; p) - GT (aiiq; aiip), the Husimi function of any physical state is converted into a function which is also the Husimi function of some physical state. More precisely, it has been proved that, if Q(q, p) is the Husimi function, the function aii(2) Q(aiiq; aiip) is also the Husimi function. We call a state with the Husimi function aii(2) Q(aiiq; aiip) the stretched state and investigate the properties of the stretched Fock states. These states can be obtained as a result of applying the scaling transform to the Fock states of the harmonic oscillator. The harmonic-oscillator Fock states are pure states, but the stretched Fock states are mixed states. We find the density matrices of stretched Fock states in an explicit form. Their structure can be described with the help of negative binomial distributions. We present the graphs of distributions of negative binomial coefficients for different stretched Fock states and show the von Neumann entropy of the simplest stretched Fock state.",
journal = "Journal of Russian Laser Research",
title = "Scaling Transform and Stretched States in Quantum Mechanics",
volume = "37",
number = "5",
pages = "434-439",
doi = "10.1007/s10946-016-9594-4"
}
Andreev, V. A., Davidović, D. M., Davidović, L. D., Davidović, M. D., Davidović, M. D.,& Zotov, S. D.. (2016). Scaling Transform and Stretched States in Quantum Mechanics. in Journal of Russian Laser Research, 37(5), 434-439.
https://doi.org/10.1007/s10946-016-9594-4
Andreev VA, Davidović DM, Davidović LD, Davidović MD, Davidović MD, Zotov SD. Scaling Transform and Stretched States in Quantum Mechanics. in Journal of Russian Laser Research. 2016;37(5):434-439.
doi:10.1007/s10946-016-9594-4 .
Andreev, Vladimir A., Davidović, Dragomir M., Davidović, Ljubica D., Davidović, Milena D., Davidović, Miloš D., Zotov, Sergey D., "Scaling Transform and Stretched States in Quantum Mechanics" in Journal of Russian Laser Research, 37, no. 5 (2016):434-439,
https://doi.org/10.1007/s10946-016-9594-4 . .
1
1
2

Derivation of the Husimi symbols without antinormal ordering, scale transformation and uncertainty relations

Andreev, Vladimir A.; Davidović, Milena D.; Davidovic, Ljubica D.; Davidović, Miloš D.; Davidovic, Dragomir M.

(2015)

TY  - JOUR
AU  - Andreev, Vladimir A.
AU  - Davidović, Milena D.
AU  - Davidovic, Ljubica D.
AU  - Davidović, Miloš D.
AU  - Davidovic, Dragomir M.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/643
AB  - We propose a new method for the derivation of Husimi symbols, for operators that are given in the form of products of an arbitrary number of coordinates, and momentum operators, in an arbitrary order. For such an operator, in the standard approach, one expresses coordinate and momentum operators as a linear combination of the creation and annihilation operators, and then uses the antinormal ordering to obtain the final form of the symbol. In our method, one obtains the Husimi symbol in a much more straightforward fashion, departing directly from operator explicit form without transforming it through creation and annihilation operators. With this method the mean values of some operators are found. It is shown how the Heisenberg and the Schrodinger-Robertson uncertainty relations, for position and momentum, are transformed under scale transformation (q; p) - GT (lambda q; lambda p). The physical sense of some states which can be constructed with this transformation is also discussed.
T2  - Physica Scripta
T1  - Derivation of the Husimi symbols without antinormal ordering, scale transformation and uncertainty relations
VL  - 90
IS  - 7
DO  - 10.1088/0031-8949/90/7/074023
ER  - 
@article{
author = "Andreev, Vladimir A. and Davidović, Milena D. and Davidovic, Ljubica D. and Davidović, Miloš D. and Davidovic, Dragomir M.",
year = "2015",
abstract = "We propose a new method for the derivation of Husimi symbols, for operators that are given in the form of products of an arbitrary number of coordinates, and momentum operators, in an arbitrary order. For such an operator, in the standard approach, one expresses coordinate and momentum operators as a linear combination of the creation and annihilation operators, and then uses the antinormal ordering to obtain the final form of the symbol. In our method, one obtains the Husimi symbol in a much more straightforward fashion, departing directly from operator explicit form without transforming it through creation and annihilation operators. With this method the mean values of some operators are found. It is shown how the Heisenberg and the Schrodinger-Robertson uncertainty relations, for position and momentum, are transformed under scale transformation (q; p) - GT (lambda q; lambda p). The physical sense of some states which can be constructed with this transformation is also discussed.",
journal = "Physica Scripta",
title = "Derivation of the Husimi symbols without antinormal ordering, scale transformation and uncertainty relations",
volume = "90",
number = "7",
doi = "10.1088/0031-8949/90/7/074023"
}
Andreev, V. A., Davidović, M. D., Davidovic, L. D., Davidović, M. D.,& Davidovic, D. M.. (2015). Derivation of the Husimi symbols without antinormal ordering, scale transformation and uncertainty relations. in Physica Scripta, 90(7).
https://doi.org/10.1088/0031-8949/90/7/074023
Andreev VA, Davidović MD, Davidovic LD, Davidović MD, Davidovic DM. Derivation of the Husimi symbols without antinormal ordering, scale transformation and uncertainty relations. in Physica Scripta. 2015;90(7).
doi:10.1088/0031-8949/90/7/074023 .
Andreev, Vladimir A., Davidović, Milena D., Davidovic, Ljubica D., Davidović, Miloš D., Davidovic, Dragomir M., "Derivation of the Husimi symbols without antinormal ordering, scale transformation and uncertainty relations" in Physica Scripta, 90, no. 7 (2015),
https://doi.org/10.1088/0031-8949/90/7/074023 . .
1
2
3
3

Build-Up PMMA Plate Effect on Calibration of TLD Reader

Kaljević, Jelica; Stanković, Jelena S.; Živanović, Miloš Z.; Ćeklić, Sandra; Lazarević, Đorđe R.

(2015)

TY  - CONF
AU  - Kaljević, Jelica
AU  - Stanković, Jelena S.
AU  - Živanović, Miloš Z.
AU  - Ćeklić, Sandra
AU  - Lazarević, Đorđe R.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7121
AB  - The routine monitoring of the occupationally exposed individuals constitutes an integral part of radiation protection program implemented at the Vinca Institute of Nuclear Sciences (INNV). The Individual monitoring service (IMS) at the INNV, accredited according to quality standard EN ISO/IEC 17025, is using Harshaw 6600 Plus automatic reader and thermoluminescent dosimeters (TLD) from two manufacturers (Harshaw, RadPro international GmbH). Working procedures are implemented according to Technical Recommendations for Monitoring Individuals Occupationally Exposed to External Radiation, RP 160 (European Commission, 2009). Among general consideration, RP 160 is suggesting that routine calibration of dosimetry system should be performed taking into consideration secondary charged particle equilibrium. As TLD system in use at IMS INNV comprises of TLD reader and of TLD cards, this consideration should be applied in both cases: when the reader and the TLD cards are being calibrated. During reader calibration, secondary charged particle equilibrium can be ensured using build-up PMMA plate of certain thickness placed in front of dosimeters. In this paper, influence of the build-up plate on reader calibration is being analyzed. This influence is observed through changes in reader calibration factor (RCF). RCF values obtained during reader calibration procedure with and without 2 mm thick build-up plate are presented. Exposures of whole body TLDs placed on slab phantom were done with Cs-137 radiation source located at Secondary Standard Dosimetry Laboratory (SSDL) at INNV. TLDs from both manufacturers had 2 detectors for measuring the dose equivalent at the depths of 10 mm and 0.07 mm. TLD reader was calibrated to measure effective dose in terms of Hp(10) and local skin dose in terms of Hp(0.07). RCF values for detectors measuring Hp(10), from both manufacturers, when irradiated without the plate were around 5% higher than RCF values obtained when irradiations were done with the plate. Values of RCFs for detectors measuring Hp(0.07) were around 1% higher when the plate had not been used. As RCF value is inversely proportional to measured dose, reader calibration without build-up plate, in terms of Hp(10), would lead to underestimated dose values. The observed RCF deviation of Hp(0.07) detector is regarded as consequence of exposure conditions uncertainties. In conclusion, if a constant geometry and constant operational conditions of TLDs are achieved, the only part of the TLD system that is not stable for a long time period is the TLD reader. To avoid inaccurate results, RCF should be orderly checked and reader calibration should be done according to widely accepted standards, currently in effect.
C3  - RAD Conference Proceedings
T1  - Build-Up PMMA Plate Effect on Calibration of TLD Reader
SP  - 147
EP  - 150
ER  - 
@conference{
author = "Kaljević, Jelica and Stanković, Jelena S. and Živanović, Miloš Z. and Ćeklić, Sandra and Lazarević, Đorđe R.",
year = "2015",
abstract = "The routine monitoring of the occupationally exposed individuals constitutes an integral part of radiation protection program implemented at the Vinca Institute of Nuclear Sciences (INNV). The Individual monitoring service (IMS) at the INNV, accredited according to quality standard EN ISO/IEC 17025, is using Harshaw 6600 Plus automatic reader and thermoluminescent dosimeters (TLD) from two manufacturers (Harshaw, RadPro international GmbH). Working procedures are implemented according to Technical Recommendations for Monitoring Individuals Occupationally Exposed to External Radiation, RP 160 (European Commission, 2009). Among general consideration, RP 160 is suggesting that routine calibration of dosimetry system should be performed taking into consideration secondary charged particle equilibrium. As TLD system in use at IMS INNV comprises of TLD reader and of TLD cards, this consideration should be applied in both cases: when the reader and the TLD cards are being calibrated. During reader calibration, secondary charged particle equilibrium can be ensured using build-up PMMA plate of certain thickness placed in front of dosimeters. In this paper, influence of the build-up plate on reader calibration is being analyzed. This influence is observed through changes in reader calibration factor (RCF). RCF values obtained during reader calibration procedure with and without 2 mm thick build-up plate are presented. Exposures of whole body TLDs placed on slab phantom were done with Cs-137 radiation source located at Secondary Standard Dosimetry Laboratory (SSDL) at INNV. TLDs from both manufacturers had 2 detectors for measuring the dose equivalent at the depths of 10 mm and 0.07 mm. TLD reader was calibrated to measure effective dose in terms of Hp(10) and local skin dose in terms of Hp(0.07). RCF values for detectors measuring Hp(10), from both manufacturers, when irradiated without the plate were around 5% higher than RCF values obtained when irradiations were done with the plate. Values of RCFs for detectors measuring Hp(0.07) were around 1% higher when the plate had not been used. As RCF value is inversely proportional to measured dose, reader calibration without build-up plate, in terms of Hp(10), would lead to underestimated dose values. The observed RCF deviation of Hp(0.07) detector is regarded as consequence of exposure conditions uncertainties. In conclusion, if a constant geometry and constant operational conditions of TLDs are achieved, the only part of the TLD system that is not stable for a long time period is the TLD reader. To avoid inaccurate results, RCF should be orderly checked and reader calibration should be done according to widely accepted standards, currently in effect.",
journal = "RAD Conference Proceedings",
title = "Build-Up PMMA Plate Effect on Calibration of TLD Reader",
pages = "147-150"
}
Kaljević, J., Stanković, J. S., Živanović, M. Z., Ćeklić, S.,& Lazarević, Đ. R.. (2015). Build-Up PMMA Plate Effect on Calibration of TLD Reader. in RAD Conference Proceedings, 147-150.
Kaljević J, Stanković JS, Živanović MZ, Ćeklić S, Lazarević ĐR. Build-Up PMMA Plate Effect on Calibration of TLD Reader. in RAD Conference Proceedings. 2015;:147-150..
Kaljević, Jelica, Stanković, Jelena S., Živanović, Miloš Z., Ćeklić, Sandra, Lazarević, Đorđe R., "Build-Up PMMA Plate Effect on Calibration of TLD Reader" in RAD Conference Proceedings (2015):147-150.

A direct derivation of the relativistic Lagrangian for a system of particles using DAlamberts principle

Nađđerđ, Laslo; Davidović, Miloš D.; Davidovic, Dragomir M.

(2014)

TY  - JOUR
AU  - Nađđerđ, Laslo
AU  - Davidović, Miloš D.
AU  - Davidovic, Dragomir M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/190
AB  - We present a derivation of the Lagrangian for a system of relativistic particles, starting from DAlamberts principle. We follow the virtually forgotten derivation of Pars, using generally accepted notation, while introducing some new steps in the derivation and clarifying others. (C) 2014 American Association of Physics Teachers.
T2  - American Journal of Physics
T1  - A direct derivation of the relativistic Lagrangian for a system of particles using DAlamberts principle
VL  - 82
IS  - 11
SP  - 1083
EP  - 1086
DO  - 10.1119/1.4885349
ER  - 
@article{
author = "Nađđerđ, Laslo and Davidović, Miloš D. and Davidovic, Dragomir M.",
year = "2014",
abstract = "We present a derivation of the Lagrangian for a system of relativistic particles, starting from DAlamberts principle. We follow the virtually forgotten derivation of Pars, using generally accepted notation, while introducing some new steps in the derivation and clarifying others. (C) 2014 American Association of Physics Teachers.",
journal = "American Journal of Physics",
title = "A direct derivation of the relativistic Lagrangian for a system of particles using DAlamberts principle",
volume = "82",
number = "11",
pages = "1083-1086",
doi = "10.1119/1.4885349"
}
Nađđerđ, L., Davidović, M. D.,& Davidovic, D. M.. (2014). A direct derivation of the relativistic Lagrangian for a system of particles using DAlamberts principle. in American Journal of Physics, 82(11), 1083-1086.
https://doi.org/10.1119/1.4885349
Nađđerđ L, Davidović MD, Davidovic DM. A direct derivation of the relativistic Lagrangian for a system of particles using DAlamberts principle. in American Journal of Physics. 2014;82(11):1083-1086.
doi:10.1119/1.4885349 .
Nađđerđ, Laslo, Davidović, Miloš D., Davidovic, Dragomir M., "A direct derivation of the relativistic Lagrangian for a system of particles using DAlamberts principle" in American Journal of Physics, 82, no. 11 (2014):1083-1086,
https://doi.org/10.1119/1.4885349 . .
1
2
2
2

Double B-Spline Finite Elements for 3d Electromagnetic

Davidović, Miloš D.; Ilic, Milan M.

(2014)

TY  - JOUR
AU  - Davidović, Miloš D.
AU  - Ilic, Milan M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5876
T2  - Microwave and Optical Technology Letters
T1  - Double B-Spline Finite Elements for 3d Electromagnetic
VL  - 56
IS  - 3
SP  - 619
EP  - 624
DO  - 10.1002/mop.28178
ER  - 
@article{
author = "Davidović, Miloš D. and Ilic, Milan M.",
year = "2014",
journal = "Microwave and Optical Technology Letters",
title = "Double B-Spline Finite Elements for 3d Electromagnetic",
volume = "56",
number = "3",
pages = "619-624",
doi = "10.1002/mop.28178"
}
Davidović, M. D.,& Ilic, M. M.. (2014). Double B-Spline Finite Elements for 3d Electromagnetic. in Microwave and Optical Technology Letters, 56(3), 619-624.
https://doi.org/10.1002/mop.28178
Davidović MD, Ilic MM. Double B-Spline Finite Elements for 3d Electromagnetic. in Microwave and Optical Technology Letters. 2014;56(3):619-624.
doi:10.1002/mop.28178 .
Davidović, Miloš D., Ilic, Milan M., "Double B-Spline Finite Elements for 3d Electromagnetic" in Microwave and Optical Technology Letters, 56, no. 3 (2014):619-624,
https://doi.org/10.1002/mop.28178 . .

Operator Method for Calculating Q Symbols and Their Relation to Weyl-Wigner Symbols and Symplectic Tomogram Symbols

Andreev, V. A.; Davidovic, L. D.; Davidović, Milena D.; Davidović, Miloš D.; Manko, V. I.; Manko, M. A.

(2014)

TY  - JOUR
AU  - Andreev, V. A.
AU  - Davidovic, L. D.
AU  - Davidović, Milena D.
AU  - Davidović, Miloš D.
AU  - Manko, V. I.
AU  - Manko, M. A.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6033
AB  - We propose a new method for calculating Husimi symbols of operators. In contrast to the standard method, it does not require using the anti-normal-ordering procedure. According to this method, the coordinate and momentum operators (q) over cap and (p) over cap are assigned other operators (X) over cap and (P) over cap satisfying the same commutation relations. We then find the result of acting with the (X) over cap and (P) over cap operators and also polynomials in these operators on the Husimi function. After the obtained expression is integrated over the phase space coordinates, the integrand becomes a Husimi function times the symbol of the operator chosen to act on that function. We explicitly evaluate the Husimi symbols for operators that are powers of (X) over cap or (P) over cap.
T2  - Theoretical and Mathematical Physics
T1  - Operator Method for Calculating Q Symbols and Their Relation to Weyl-Wigner Symbols and Symplectic Tomogram Symbols
VL  - 179
IS  - 2
SP  - 559
EP  - 573
DO  - 10.1007/s11232-014-0162-1
ER  - 
@article{
author = "Andreev, V. A. and Davidovic, L. D. and Davidović, Milena D. and Davidović, Miloš D. and Manko, V. I. and Manko, M. A.",
year = "2014",
abstract = "We propose a new method for calculating Husimi symbols of operators. In contrast to the standard method, it does not require using the anti-normal-ordering procedure. According to this method, the coordinate and momentum operators (q) over cap and (p) over cap are assigned other operators (X) over cap and (P) over cap satisfying the same commutation relations. We then find the result of acting with the (X) over cap and (P) over cap operators and also polynomials in these operators on the Husimi function. After the obtained expression is integrated over the phase space coordinates, the integrand becomes a Husimi function times the symbol of the operator chosen to act on that function. We explicitly evaluate the Husimi symbols for operators that are powers of (X) over cap or (P) over cap.",
journal = "Theoretical and Mathematical Physics",
title = "Operator Method for Calculating Q Symbols and Their Relation to Weyl-Wigner Symbols and Symplectic Tomogram Symbols",
volume = "179",
number = "2",
pages = "559-573",
doi = "10.1007/s11232-014-0162-1"
}
Andreev, V. A., Davidovic, L. D., Davidović, M. D., Davidović, M. D., Manko, V. I.,& Manko, M. A.. (2014). Operator Method for Calculating Q Symbols and Their Relation to Weyl-Wigner Symbols and Symplectic Tomogram Symbols. in Theoretical and Mathematical Physics, 179(2), 559-573.
https://doi.org/10.1007/s11232-014-0162-1
Andreev VA, Davidovic LD, Davidović MD, Davidović MD, Manko VI, Manko MA. Operator Method for Calculating Q Symbols and Their Relation to Weyl-Wigner Symbols and Symplectic Tomogram Symbols. in Theoretical and Mathematical Physics. 2014;179(2):559-573.
doi:10.1007/s11232-014-0162-1 .
Andreev, V. A., Davidovic, L. D., Davidović, Milena D., Davidović, Miloš D., Manko, V. I., Manko, M. A., "Operator Method for Calculating Q Symbols and Their Relation to Weyl-Wigner Symbols and Symplectic Tomogram Symbols" in Theoretical and Mathematical Physics, 179, no. 2 (2014):559-573,
https://doi.org/10.1007/s11232-014-0162-1 . .
6
5
6

High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region

Žunić, Zora S.; Ujić, Predrag; Nađđerđ, Laslo; Yarmoshenko, Ilia V.; Radanovic, S. B.; Petrović, S. Komatina; Čeliković, Igor T.; Komatina, M.; Bossew, Peter

(2014)

TY  - JOUR
AU  - Žunić, Zora S.
AU  - Ujić, Predrag
AU  - Nađđerđ, Laslo
AU  - Yarmoshenko, Ilia V.
AU  - Radanovic, S. B.
AU  - Petrović, S. Komatina
AU  - Čeliković, Igor T.
AU  - Komatina, M.
AU  - Bossew, Peter
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/231
AB  - In this work the strong influence of geological factors on the variability of indoor radon is found in two of three geologically very different regions of South-Eastern Europe. A method to estimate the annual mean concentration when one seasonal measurement is missing is proposed. Large differences of radon concentrations in different rooms of the same house and significant difference in radon concentrations in one season comparing it to the others are noted in certain cases. Geological factors that can lead to such behavior are discussed. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Applied Radiation and Isotopes
T1  - High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region
VL  - 94
SP  - 328
EP  - 337
DO  - 10.1016/j.apradiso.2014.08.018
ER  - 
@article{
author = "Žunić, Zora S. and Ujić, Predrag and Nađđerđ, Laslo and Yarmoshenko, Ilia V. and Radanovic, S. B. and Petrović, S. Komatina and Čeliković, Igor T. and Komatina, M. and Bossew, Peter",
year = "2014",
abstract = "In this work the strong influence of geological factors on the variability of indoor radon is found in two of three geologically very different regions of South-Eastern Europe. A method to estimate the annual mean concentration when one seasonal measurement is missing is proposed. Large differences of radon concentrations in different rooms of the same house and significant difference in radon concentrations in one season comparing it to the others are noted in certain cases. Geological factors that can lead to such behavior are discussed. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Applied Radiation and Isotopes",
title = "High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region",
volume = "94",
pages = "328-337",
doi = "10.1016/j.apradiso.2014.08.018"
}
Žunić, Z. S., Ujić, P., Nađđerđ, L., Yarmoshenko, I. V., Radanovic, S. B., Petrović, S. K., Čeliković, I. T., Komatina, M.,& Bossew, P.. (2014). High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region. in Applied Radiation and Isotopes, 94, 328-337.
https://doi.org/10.1016/j.apradiso.2014.08.018
Žunić ZS, Ujić P, Nađđerđ L, Yarmoshenko IV, Radanovic SB, Petrović SK, Čeliković IT, Komatina M, Bossew P. High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region. in Applied Radiation and Isotopes. 2014;94:328-337.
doi:10.1016/j.apradiso.2014.08.018 .
Žunić, Zora S., Ujić, Predrag, Nađđerđ, Laslo, Yarmoshenko, Ilia V., Radanovic, S. B., Petrović, S. Komatina, Čeliković, Igor T., Komatina, M., Bossew, Peter, "High variability of indoor radon concentrations in uraniferous bedrock areas in the Balkan region" in Applied Radiation and Isotopes, 94 (2014):328-337,
https://doi.org/10.1016/j.apradiso.2014.08.018 . .
5
7
8

Performance of Radiation Survey Meters in X- and Gamma-Radiation Fields

Ćeklić, Sandra; Aranđić, Danijela; Živanović, Miloš Z.; Ciraj-Bjelac, Olivera; Lazarević, Đorđe R.

(2014)

TY  - JOUR
AU  - Ćeklić, Sandra
AU  - Aranđić, Danijela
AU  - Živanović, Miloš Z.
AU  - Ciraj-Bjelac, Olivera
AU  - Lazarević, Đorđe R.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7049
AB  - The aim of this work was to investigate the different types of radiation detectors commonly used for radiation protection purposes as survey meters. The study was performed on survey meters that use different detectors as ionisation chamber, Geiger Mueller (GM) counter and scintillation detector. For each survey meter, energy dependence and angular response in X-and gamma-radiation fields was tested. The following commercially available survey meters were investigated: ionisation chambers Victoreen 451P, Babyline 31 and VA-J-15A, Geiger counter MRK-M87, 6150 AD6 and FAG FH 40F2 and scintillation counter 6150 ADB. As a source of gamma radiation, Cs-137 and Co-60 were used whereas X-ray radiation fields were generated using an X-ray unit. The radiation characteristics of the survey meters were mostly in compliance with references estimated by standard IEC 1017-2. However, some of them showed larger deviation at lower energies. GM counters exhibit strong energy dependence for low-energy photons.
T2  - Radiation Protection Dosimetry
T1  - Performance of Radiation Survey Meters in X- and Gamma-Radiation Fields
VL  - 162
IS  - 1-2
SP  - 139
EP  - 143
DO  - 10.1093/rpd/ncu246
ER  - 
@article{
author = "Ćeklić, Sandra and Aranđić, Danijela and Živanović, Miloš Z. and Ciraj-Bjelac, Olivera and Lazarević, Đorđe R.",
year = "2014",
abstract = "The aim of this work was to investigate the different types of radiation detectors commonly used for radiation protection purposes as survey meters. The study was performed on survey meters that use different detectors as ionisation chamber, Geiger Mueller (GM) counter and scintillation detector. For each survey meter, energy dependence and angular response in X-and gamma-radiation fields was tested. The following commercially available survey meters were investigated: ionisation chambers Victoreen 451P, Babyline 31 and VA-J-15A, Geiger counter MRK-M87, 6150 AD6 and FAG FH 40F2 and scintillation counter 6150 ADB. As a source of gamma radiation, Cs-137 and Co-60 were used whereas X-ray radiation fields were generated using an X-ray unit. The radiation characteristics of the survey meters were mostly in compliance with references estimated by standard IEC 1017-2. However, some of them showed larger deviation at lower energies. GM counters exhibit strong energy dependence for low-energy photons.",
journal = "Radiation Protection Dosimetry",
title = "Performance of Radiation Survey Meters in X- and Gamma-Radiation Fields",
volume = "162",
number = "1-2",
pages = "139-143",
doi = "10.1093/rpd/ncu246"
}
Ćeklić, S., Aranđić, D., Živanović, M. Z., Ciraj-Bjelac, O.,& Lazarević, Đ. R.. (2014). Performance of Radiation Survey Meters in X- and Gamma-Radiation Fields. in Radiation Protection Dosimetry, 162(1-2), 139-143.
https://doi.org/10.1093/rpd/ncu246
Ćeklić S, Aranđić D, Živanović MZ, Ciraj-Bjelac O, Lazarević ĐR. Performance of Radiation Survey Meters in X- and Gamma-Radiation Fields. in Radiation Protection Dosimetry. 2014;162(1-2):139-143.
doi:10.1093/rpd/ncu246 .
Ćeklić, Sandra, Aranđić, Danijela, Živanović, Miloš Z., Ciraj-Bjelac, Olivera, Lazarević, Đorđe R., "Performance of Radiation Survey Meters in X- and Gamma-Radiation Fields" in Radiation Protection Dosimetry, 162, no. 1-2 (2014):139-143,
https://doi.org/10.1093/rpd/ncu246 . .
5
5
5

Lagrangian form of Schrodinger equation

Arsenović, Dušan; Buric, N.; Davidovic, D. M.; Prvanovic, S.

(2014)

TY  - JOUR
AU  - Arsenović, Dušan
AU  - Buric, N.
AU  - Davidovic, D. M.
AU  - Prvanovic, S.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5452
AB  - Lagrangian formulation of quantum mechanical Schrodinger equation is developed in general and illustrated in the eigenbasis of the Hamiltonian and in the coordinate representation. The Lagrangian formulation of physically plausible quantum system results in a well defined second order equation on a real vector space. The Klein-Gordon equation for a real field is shown to be the Lagrangian form of the corresponding Schrodinger equation.
T2  - Foundations of Physics
T1  - Lagrangian form of Schrodinger equation
VL  - 44
IS  - 7
SP  - 725
EP  - 735
DO  - 10.1007/s10701-014-9810-4
ER  - 
@article{
author = "Arsenović, Dušan and Buric, N. and Davidovic, D. M. and Prvanovic, S.",
year = "2014",
abstract = "Lagrangian formulation of quantum mechanical Schrodinger equation is developed in general and illustrated in the eigenbasis of the Hamiltonian and in the coordinate representation. The Lagrangian formulation of physically plausible quantum system results in a well defined second order equation on a real vector space. The Klein-Gordon equation for a real field is shown to be the Lagrangian form of the corresponding Schrodinger equation.",
journal = "Foundations of Physics",
title = "Lagrangian form of Schrodinger equation",
volume = "44",
number = "7",
pages = "725-735",
doi = "10.1007/s10701-014-9810-4"
}
Arsenović, D., Buric, N., Davidovic, D. M.,& Prvanovic, S.. (2014). Lagrangian form of Schrodinger equation. in Foundations of Physics, 44(7), 725-735.
https://doi.org/10.1007/s10701-014-9810-4
Arsenović D, Buric N, Davidovic DM, Prvanovic S. Lagrangian form of Schrodinger equation. in Foundations of Physics. 2014;44(7):725-735.
doi:10.1007/s10701-014-9810-4 .
Arsenović, Dušan, Buric, N., Davidovic, D. M., Prvanovic, S., "Lagrangian form of Schrodinger equation" in Foundations of Physics, 44, no. 7 (2014):725-735,
https://doi.org/10.1007/s10701-014-9810-4 . .

A possible improvement of the determination of Ba-133 activity and detection efficiency by the sum-peak method, by inclusion of the previously neglected transitions

Nađđerđ, Laslo; Davidović, Miloš D.; Davidovic, Dragomir M.; Milošević, Miodrag J.; Jordanov, Dragana; Stanković, Srboljub J.; Prvanovic, Slobodan L.

(2013)

TY  - JOUR
AU  - Nađđerđ, Laslo
AU  - Davidović, Miloš D.
AU  - Davidovic, Dragomir M.
AU  - Milošević, Miodrag J.
AU  - Jordanov, Dragana
AU  - Stanković, Srboljub J.
AU  - Prvanovic, Slobodan L.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5180
AB  - In the treatment of Ba-133 decay by the method of coincidence summing, the transitions to the first two excited states of Cs-133 were ignored in former works. By applying the most accurate values for these transitions available in literature, we include them into the count rate equations and obtain solutions for the corresponding system. As a result of this more accurate forming of count rate equations, some terms, which contain previously ignored transition probabilities, turn out to be more significant than the conventionally included terms. We show that their inclusion in the system of count rate equations leads to fine improvements in the determinations of detection efficiencies and the activity of the Ba-133 source. (c) 2012 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - A possible improvement of the determination of Ba-133 activity and detection efficiency by the sum-peak method, by inclusion of the previously neglected transitions
VL  - 698
SP  - 60
EP  - 65
DO  - 10.1016/j.nima.2012.09.044
ER  - 
@article{
author = "Nađđerđ, Laslo and Davidović, Miloš D. and Davidovic, Dragomir M. and Milošević, Miodrag J. and Jordanov, Dragana and Stanković, Srboljub J. and Prvanovic, Slobodan L.",
year = "2013",
abstract = "In the treatment of Ba-133 decay by the method of coincidence summing, the transitions to the first two excited states of Cs-133 were ignored in former works. By applying the most accurate values for these transitions available in literature, we include them into the count rate equations and obtain solutions for the corresponding system. As a result of this more accurate forming of count rate equations, some terms, which contain previously ignored transition probabilities, turn out to be more significant than the conventionally included terms. We show that their inclusion in the system of count rate equations leads to fine improvements in the determinations of detection efficiencies and the activity of the Ba-133 source. (c) 2012 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "A possible improvement of the determination of Ba-133 activity and detection efficiency by the sum-peak method, by inclusion of the previously neglected transitions",
volume = "698",
pages = "60-65",
doi = "10.1016/j.nima.2012.09.044"
}
Nađđerđ, L., Davidović, M. D., Davidovic, D. M., Milošević, M. J., Jordanov, D., Stanković, S. J.,& Prvanovic, S. L.. (2013). A possible improvement of the determination of Ba-133 activity and detection efficiency by the sum-peak method, by inclusion of the previously neglected transitions. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 698, 60-65.
https://doi.org/10.1016/j.nima.2012.09.044
Nađđerđ L, Davidović MD, Davidovic DM, Milošević MJ, Jordanov D, Stanković SJ, Prvanovic SL. A possible improvement of the determination of Ba-133 activity and detection efficiency by the sum-peak method, by inclusion of the previously neglected transitions. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2013;698:60-65.
doi:10.1016/j.nima.2012.09.044 .
Nađđerđ, Laslo, Davidović, Miloš D., Davidovic, Dragomir M., Milošević, Miodrag J., Jordanov, Dragana, Stanković, Srboljub J., Prvanovic, Slobodan L., "A possible improvement of the determination of Ba-133 activity and detection efficiency by the sum-peak method, by inclusion of the previously neglected transitions" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 698 (2013):60-65,
https://doi.org/10.1016/j.nima.2012.09.044 . .
4
4
3

Optimisation By Mathematical Modeling of Physicochemical Characteristics of Concrete Containers in Radioactive Waste Management

Plećaš, Ilija B.; Nađđerđ, Laslo; Davidović, Miloš D.

(2013)

TY  - JOUR
AU  - Plećaš, Ilija B.
AU  - Nađđerđ, Laslo
AU  - Davidović, Miloš D.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5422
AB  - A method for obtaining an optimal concrete container composition used for storing radioactive waste from nuclear power plants is developed. It is applied to the radionuclides Co-60, Cs-137, Sr-85, and Mn-54. A set of recipes for concrete composition leading to an optimal solution is given.
T2  - Nuclear technology and radiation protection
T1  - Optimisation By Mathematical Modeling of Physicochemical Characteristics of Concrete Containers in Radioactive Waste Management
VL  - 28
IS  - 1
SP  - 25
EP  - 30
DO  - 10.2298/NTRP1301025P
ER  - 
@article{
author = "Plećaš, Ilija B. and Nađđerđ, Laslo and Davidović, Miloš D.",
year = "2013",
abstract = "A method for obtaining an optimal concrete container composition used for storing radioactive waste from nuclear power plants is developed. It is applied to the radionuclides Co-60, Cs-137, Sr-85, and Mn-54. A set of recipes for concrete composition leading to an optimal solution is given.",
journal = "Nuclear technology and radiation protection",
title = "Optimisation By Mathematical Modeling of Physicochemical Characteristics of Concrete Containers in Radioactive Waste Management",
volume = "28",
number = "1",
pages = "25-30",
doi = "10.2298/NTRP1301025P"
}
Plećaš, I. B., Nađđerđ, L.,& Davidović, M. D.. (2013). Optimisation By Mathematical Modeling of Physicochemical Characteristics of Concrete Containers in Radioactive Waste Management. in Nuclear technology and radiation protection, 28(1), 25-30.
https://doi.org/10.2298/NTRP1301025P
Plećaš IB, Nađđerđ L, Davidović MD. Optimisation By Mathematical Modeling of Physicochemical Characteristics of Concrete Containers in Radioactive Waste Management. in Nuclear technology and radiation protection. 2013;28(1):25-30.
doi:10.2298/NTRP1301025P .
Plećaš, Ilija B., Nađđerđ, Laslo, Davidović, Miloš D., "Optimisation By Mathematical Modeling of Physicochemical Characteristics of Concrete Containers in Radioactive Waste Management" in Nuclear technology and radiation protection, 28, no. 1 (2013):25-30,
https://doi.org/10.2298/NTRP1301025P . .
1
1

Phosphocholine-binding antibody activities are hierarchically encoded in the sequence of the heavy-chain variable region: dominance of self-association activity in the T15 idiotype

Srdić-Rajić, Tatjana; Kekovic, Goran; Davidovic, Dragomir M.; Metlaš, Radmila

(2013)

TY  - JOUR
AU  - Srdić-Rajić, Tatjana
AU  - Kekovic, Goran
AU  - Davidovic, Dragomir M.
AU  - Metlaš, Radmila
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5519
AB  - A physical and mathematical model identifies similarities between phosphocholine-binding antibodies.A methodology based on the representation of each amino acid of a protein sequence by the electron-ion interaction potential and subsequent analysis by signal processing was used to determine the characteristic or common frequency (in Hz) that reflects the biological activity shared among phosphocholine (PC)-binding antibodies. The common frequency for the variable portion of the heavy chain (VH) of the PC-specific antibodies is found to be at f 0.37 Hz. The VH sequences of the PC-binding antibodies exhibit three subsites for the PC moiety where hypervariable region 2 (CDR2) plays a role in the interaction with the phosphate group. Mutations in this VH region have an impact on the ability of mutant variants to bind PC and its carrier molecule, as well as on the characteristic frequency shift toward f 0.12 Hz for mutants failing to bind both hapten and carrier. The VH sequence of mutants that retain the ability to bind PC still shows f 0.37 Hz, suggesting that this frequency determines PC binding. However, this statement was not confirmed as mutation in another PC subsite impairs PC binding but retains both the phosphate-group recognition and the frequency at f 0.37 Hz. Herein, this finding is discussed to promote the idea that the VH sequence of the PC-binding antibodies encodes the subsite for phosphate-group binding as a dominant functional activity and that only CDR2 of the T15-idiotype antibodies together with FR3 region form an autonomous self-association function represented by the T15VH5073 peptide with f 0.370.05 Hz. Thus, these data confirmed that T15VH50-73 peptide might be used in superantibody technology.
T2  - International Immunology
T1  - Phosphocholine-binding antibody activities are hierarchically encoded in the sequence of the heavy-chain variable region: dominance of self-association activity in the T15 idiotype
VL  - 25
IS  - 6
SP  - 345
EP  - 352
DO  - 10.1093/intimm/dxs156
ER  - 
@article{
author = "Srdić-Rajić, Tatjana and Kekovic, Goran and Davidovic, Dragomir M. and Metlaš, Radmila",
year = "2013",
abstract = "A physical and mathematical model identifies similarities between phosphocholine-binding antibodies.A methodology based on the representation of each amino acid of a protein sequence by the electron-ion interaction potential and subsequent analysis by signal processing was used to determine the characteristic or common frequency (in Hz) that reflects the biological activity shared among phosphocholine (PC)-binding antibodies. The common frequency for the variable portion of the heavy chain (VH) of the PC-specific antibodies is found to be at f 0.37 Hz. The VH sequences of the PC-binding antibodies exhibit three subsites for the PC moiety where hypervariable region 2 (CDR2) plays a role in the interaction with the phosphate group. Mutations in this VH region have an impact on the ability of mutant variants to bind PC and its carrier molecule, as well as on the characteristic frequency shift toward f 0.12 Hz for mutants failing to bind both hapten and carrier. The VH sequence of mutants that retain the ability to bind PC still shows f 0.37 Hz, suggesting that this frequency determines PC binding. However, this statement was not confirmed as mutation in another PC subsite impairs PC binding but retains both the phosphate-group recognition and the frequency at f 0.37 Hz. Herein, this finding is discussed to promote the idea that the VH sequence of the PC-binding antibodies encodes the subsite for phosphate-group binding as a dominant functional activity and that only CDR2 of the T15-idiotype antibodies together with FR3 region form an autonomous self-association function represented by the T15VH5073 peptide with f 0.370.05 Hz. Thus, these data confirmed that T15VH50-73 peptide might be used in superantibody technology.",
journal = "International Immunology",
title = "Phosphocholine-binding antibody activities are hierarchically encoded in the sequence of the heavy-chain variable region: dominance of self-association activity in the T15 idiotype",
volume = "25",
number = "6",
pages = "345-352",
doi = "10.1093/intimm/dxs156"
}
Srdić-Rajić, T., Kekovic, G., Davidovic, D. M.,& Metlaš, R.. (2013). Phosphocholine-binding antibody activities are hierarchically encoded in the sequence of the heavy-chain variable region: dominance of self-association activity in the T15 idiotype. in International Immunology, 25(6), 345-352.
https://doi.org/10.1093/intimm/dxs156
Srdić-Rajić T, Kekovic G, Davidovic DM, Metlaš R. Phosphocholine-binding antibody activities are hierarchically encoded in the sequence of the heavy-chain variable region: dominance of self-association activity in the T15 idiotype. in International Immunology. 2013;25(6):345-352.
doi:10.1093/intimm/dxs156 .
Srdić-Rajić, Tatjana, Kekovic, Goran, Davidovic, Dragomir M., Metlaš, Radmila, "Phosphocholine-binding antibody activities are hierarchically encoded in the sequence of the heavy-chain variable region: dominance of self-association activity in the T15 idiotype" in International Immunology, 25, no. 6 (2013):345-352,
https://doi.org/10.1093/intimm/dxs156 . .
1
4
3
4

Quantum phase for a system with an arbitrary discrete energy spectrum

Arsenović, Dušan; Buric, Nikola; Davidovic, Dragomir; Prvanovic, Slobodan

(2013)

TY  - JOUR
AU  - Arsenović, Dušan
AU  - Buric, Nikola
AU  - Davidovic, Dragomir
AU  - Prvanovic, Slobodan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5633
AB  - Positive operator valued measures representing phase observables for systems with arbitrary discrete, possibly degenerate, spectra are constructed. The general construction is presented and discussed using illustrative examples. The phase POVM shows intricate discontinuous dependence on the eigenfrequencies. Special discussion is devoted to the systems with degenerate energy spectrum, in which case the phase observable is nonunique. We present arguments that can be used to reduces this nonuniqueness.
T2  - Physical Review A
T1  - Quantum phase for a system with an arbitrary discrete energy spectrum
VL  - 88
IS  - 2
DO  - 10.1103/PhysRevA.88.022117
ER  - 
@article{
author = "Arsenović, Dušan and Buric, Nikola and Davidovic, Dragomir and Prvanovic, Slobodan",
year = "2013",
abstract = "Positive operator valued measures representing phase observables for systems with arbitrary discrete, possibly degenerate, spectra are constructed. The general construction is presented and discussed using illustrative examples. The phase POVM shows intricate discontinuous dependence on the eigenfrequencies. Special discussion is devoted to the systems with degenerate energy spectrum, in which case the phase observable is nonunique. We present arguments that can be used to reduces this nonuniqueness.",
journal = "Physical Review A",
title = "Quantum phase for a system with an arbitrary discrete energy spectrum",
volume = "88",
number = "2",
doi = "10.1103/PhysRevA.88.022117"
}
Arsenović, D., Buric, N., Davidovic, D.,& Prvanovic, S.. (2013). Quantum phase for a system with an arbitrary discrete energy spectrum. in Physical Review A, 88(2).
https://doi.org/10.1103/PhysRevA.88.022117
Arsenović D, Buric N, Davidovic D, Prvanovic S. Quantum phase for a system with an arbitrary discrete energy spectrum. in Physical Review A. 2013;88(2).
doi:10.1103/PhysRevA.88.022117 .
Arsenović, Dušan, Buric, Nikola, Davidovic, Dragomir, Prvanovic, Slobodan, "Quantum phase for a system with an arbitrary discrete energy spectrum" in Physical Review A, 88, no. 2 (2013),
https://doi.org/10.1103/PhysRevA.88.022117 . .
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A new matrix method for calculating coincidence summing effects for gamma spectroscopy

Nađđerđ, Laslo; Jordanov, Dragana; Davidović, Miloš D.

(2012)

TY  - JOUR
AU  - Nađđerđ, Laslo
AU  - Jordanov, Dragana
AU  - Davidović, Miloš D.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4625
AB  - A new method for deriving counting rate equations describing coincidence summing of gamma and X-rays for germanium spectrometers is developed. It is applied to the decay of (139)Ce and (57)Co. It is shown that the results obtained using the proposed method are in complete agreement with the results obtained using other methods, however these results are achieved in a much clearer and simpler way. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
T1  - A new matrix method for calculating coincidence summing effects for gamma spectroscopy
VL  - 662
IS  - 1
SP  - 21
EP  - 25
DO  - 10.1016/j.nima.2011.10.002
ER  - 
@article{
author = "Nađđerđ, Laslo and Jordanov, Dragana and Davidović, Miloš D.",
year = "2012",
abstract = "A new method for deriving counting rate equations describing coincidence summing of gamma and X-rays for germanium spectrometers is developed. It is applied to the decay of (139)Ce and (57)Co. It is shown that the results obtained using the proposed method are in complete agreement with the results obtained using other methods, however these results are achieved in a much clearer and simpler way. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment",
title = "A new matrix method for calculating coincidence summing effects for gamma spectroscopy",
volume = "662",
number = "1",
pages = "21-25",
doi = "10.1016/j.nima.2011.10.002"
}
Nađđerđ, L., Jordanov, D.,& Davidović, M. D.. (2012). A new matrix method for calculating coincidence summing effects for gamma spectroscopy. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 662(1), 21-25.
https://doi.org/10.1016/j.nima.2011.10.002
Nađđerđ L, Jordanov D, Davidović MD. A new matrix method for calculating coincidence summing effects for gamma spectroscopy. in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 2012;662(1):21-25.
doi:10.1016/j.nima.2011.10.002 .
Nađđerđ, Laslo, Jordanov, Dragana, Davidović, Miloš D., "A new matrix method for calculating coincidence summing effects for gamma spectroscopy" in Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 662, no. 1 (2012):21-25,
https://doi.org/10.1016/j.nima.2011.10.002 . .
7
7
7

B-Spline Entire-Domain Higher Order Finite Elements for 3-D Electromagnetic Modeling

Davidović, Miloš D.; Notaros, Branislav M.; Ilic, Milan M.

(2012)

TY  - JOUR
AU  - Davidović, Miloš D.
AU  - Notaros, Branislav M.
AU  - Ilic, Milan M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5094
AB  - A novel entire-domain finite element technique based on curvilinear hexahedral geometrical modeling using B-splines in conjunction with higher order hierarchical polynomial curl-conforming vector basis functions for field expansions is proposed for electromagnetic analysis of microwave devices. The effectiveness of the technique is evaluated in analysis of microwave cavities and it is compared with alternative reference solutions and with HFSS. Examples demonstrate large single-element (entire-domain) models with p-refined field distributions and better accuracy in curvature modeling than with the Lagrange interpolation. Extraordinary flexibility of the B-spline hexahedral elements, combined with higher order field expansions, allows accurate modeling of complex structures with sharp edges using a single finite element.
T2  - IEEE Microwave and Wireless Components Letters
T1  - B-Spline Entire-Domain Higher Order Finite Elements for 3-D Electromagnetic Modeling
VL  - 22
IS  - 10
SP  - 497
EP  - 499
DO  - 10.1109/LMWC.2012.2217123
ER  - 
@article{
author = "Davidović, Miloš D. and Notaros, Branislav M. and Ilic, Milan M.",
year = "2012",
abstract = "A novel entire-domain finite element technique based on curvilinear hexahedral geometrical modeling using B-splines in conjunction with higher order hierarchical polynomial curl-conforming vector basis functions for field expansions is proposed for electromagnetic analysis of microwave devices. The effectiveness of the technique is evaluated in analysis of microwave cavities and it is compared with alternative reference solutions and with HFSS. Examples demonstrate large single-element (entire-domain) models with p-refined field distributions and better accuracy in curvature modeling than with the Lagrange interpolation. Extraordinary flexibility of the B-spline hexahedral elements, combined with higher order field expansions, allows accurate modeling of complex structures with sharp edges using a single finite element.",
journal = "IEEE Microwave and Wireless Components Letters",
title = "B-Spline Entire-Domain Higher Order Finite Elements for 3-D Electromagnetic Modeling",
volume = "22",
number = "10",
pages = "497-499",
doi = "10.1109/LMWC.2012.2217123"
}
Davidović, M. D., Notaros, B. M.,& Ilic, M. M.. (2012). B-Spline Entire-Domain Higher Order Finite Elements for 3-D Electromagnetic Modeling. in IEEE Microwave and Wireless Components Letters, 22(10), 497-499.
https://doi.org/10.1109/LMWC.2012.2217123
Davidović MD, Notaros BM, Ilic MM. B-Spline Entire-Domain Higher Order Finite Elements for 3-D Electromagnetic Modeling. in IEEE Microwave and Wireless Components Letters. 2012;22(10):497-499.
doi:10.1109/LMWC.2012.2217123 .
Davidović, Miloš D., Notaros, Branislav M., Ilic, Milan M., "B-Spline Entire-Domain Higher Order Finite Elements for 3-D Electromagnetic Modeling" in IEEE Microwave and Wireless Components Letters, 22, no. 10 (2012):497-499,
https://doi.org/10.1109/LMWC.2012.2217123 . .
2
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