TY  - JOUR
AU  - Andreev, Vladimir A.
AU  - Davidović, Milena D.
AU  - Davidovic, Ljubica D.
AU  - Davidović, Miloš D.
AU  - Davidović, 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 Davidović, 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.,& Davidović, 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, Davidović 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., Davidović, 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 . .

TY  - JOUR
AU  - Nađđerđ, Laslo
AU  - Davidović, Miloš D.
AU  - Davidović, 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 Davidović, 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.,& Davidović, 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, Davidović 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., Davidović, 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 . .

TY  - JOUR
AU  - Nađđerđ, Laslo
AU  - Davidović, Miloš D.
AU  - Davidović, Dragomir M.
AU  - Milošević, Miodrag J.
AU  - Jordanov, Dragana
AU  - Stanković, Srboljub
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 133Ba 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 Davidović, Dragomir M. and Milošević, Miodrag J. and Jordanov, Dragana and Stanković, Srboljub 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 133Ba 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., Davidović, D. M., Milošević, M. J., Jordanov, D., Stanković, S.,& Prvanovic, S. L.. (2013). A possible improvement of the determination of 133Ba 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, Davidović DM, Milošević MJ, Jordanov D, Stanković S, Prvanovic SL. A possible improvement of the determination of 133Ba 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., Davidović, Dragomir M., Milošević, Miodrag J., Jordanov, Dragana, Stanković, Srboljub, Prvanovic, Slobodan L., "A possible improvement of the determination of 133Ba 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 . .

TY  - JOUR
AU  - Srdić-Rajić, Tatjana
AU  - Keković, Goran
AU  - Davidović, 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 Keković, Goran and Davidović, 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., Keković, G., Davidović, 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, Keković G, Davidović 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, Keković, Goran, Davidović, 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 . .

TY  - JOUR
AU  - Davidović, Ljubica
AU  - Arsenović, Dušan
AU  - Davidović, Milena D.
AU  - Davidović, Dragomir M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3706
AB  - Using the resolution of identity spanned by coherent states of the harmonic oscillator, any entire function of the creation and the annihilation operators and its action on a vector in Hilbert space can be defined directly and simply. We show that such a direct approach applied to non-entire functions ln (a) over cap and ln (a) over cap (dagger), present in the literature, may lead to errors and contradictions. We elucidate their roots and propose a way to avoid them. We discuss the obtained results.
T2  - Journal of Physics. A: Mathematical and Theoretical
T1  - Subtle inconsistencies in the straightforward definition of the logarithmic function of annihilation and creation operators and a way to avoid them
VL  - 42
IS  - 23
DO  - 10.1088/1751-8113/42/23/235302
ER  - 

@article{
author = "Davidović, Ljubica and Arsenović, Dušan and Davidović, Milena D. and Davidović, Dragomir M.",
year = "2009",
abstract = "Using the resolution of identity spanned by coherent states of the harmonic oscillator, any entire function of the creation and the annihilation operators and its action on a vector in Hilbert space can be defined directly and simply. We show that such a direct approach applied to non-entire functions ln (a) over cap and ln (a) over cap (dagger), present in the literature, may lead to errors and contradictions. We elucidate their roots and propose a way to avoid them. We discuss the obtained results.",
journal = "Journal of Physics. A: Mathematical and Theoretical",
title = "Subtle inconsistencies in the straightforward definition of the logarithmic function of annihilation and creation operators and a way to avoid them",
volume = "42",
number = "23",
doi = "10.1088/1751-8113/42/23/235302"
}

Davidović, L., Arsenović, D., Davidović, M. D.,& Davidović, D. M.. (2009). Subtle inconsistencies in the straightforward definition of the logarithmic function of annihilation and creation operators and a way to avoid them. in Journal of Physics. A: Mathematical and Theoretical, 42(23).
https://doi.org/10.1088/1751-8113/42/23/235302

Davidović L, Arsenović D, Davidović MD, Davidović DM. Subtle inconsistencies in the straightforward definition of the logarithmic function of annihilation and creation operators and a way to avoid them. in Journal of Physics. A: Mathematical and Theoretical. 2009;42(23).
doi:10.1088/1751-8113/42/23/235302 .

Davidović, Ljubica, Arsenović, Dušan, Davidović, Milena D., Davidović, Dragomir M., "Subtle inconsistencies in the straightforward definition of the logarithmic function of annihilation and creation operators and a way to avoid them" in Journal of Physics. A: Mathematical and Theoretical, 42, no. 23 (2009),
https://doi.org/10.1088/1751-8113/42/23/235302 . .

TY  - CONF
AU  - Vukanić, Jovan V.
AU  - Davidović, Milena D.
AU  - Arsenović, Dušan
AU  - Davidović, Dragomir M.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6635
AB  - The results obtained in a Monte Carlo simulation of X-ray reflection from water show that for energies up to 20 keV, single and double reflected photons absolutely dominate. Analyzing in detail geometry of the collisions and corresponding energy relations we derive analytically the energy and angular distributions of reflected photons in double collision approximation. The results of the two approaches are compared and discussed. (c) 2006 Elsevier Ltd. All rights reserved.
C3  - Radiation Physics and Chemistry
T1  - Energy distribution of X-rays reflected from a half space in double collision approximation
VL  - 75
IS  - 11
SP  - 1953
EP  - 1955
DO  - 10.1016/j.radphyschem.2005.07.046
ER  - 

@conference{
author = "Vukanić, Jovan V. and Davidović, Milena D. and Arsenović, Dušan and Davidović, Dragomir M.",
year = "2006",
abstract = "The results obtained in a Monte Carlo simulation of X-ray reflection from water show that for energies up to 20 keV, single and double reflected photons absolutely dominate. Analyzing in detail geometry of the collisions and corresponding energy relations we derive analytically the energy and angular distributions of reflected photons in double collision approximation. The results of the two approaches are compared and discussed. (c) 2006 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "Energy distribution of X-rays reflected from a half space in double collision approximation",
volume = "75",
number = "11",
pages = "1953-1955",
doi = "10.1016/j.radphyschem.2005.07.046"
}

Vukanić, J. V., Davidović, M. D., Arsenović, D.,& Davidović, D. M.. (2006). Energy distribution of X-rays reflected from a half space in double collision approximation. in Radiation Physics and Chemistry, 75(11), 1953-1955.
https://doi.org/10.1016/j.radphyschem.2005.07.046

Vukanić JV, Davidović MD, Arsenović D, Davidović DM. Energy distribution of X-rays reflected from a half space in double collision approximation. in Radiation Physics and Chemistry. 2006;75(11):1953-1955.
doi:10.1016/j.radphyschem.2005.07.046 .

Vukanić, Jovan V., Davidović, Milena D., Arsenović, Dušan, Davidović, Dragomir M., "Energy distribution of X-rays reflected from a half space in double collision approximation" in Radiation Physics and Chemistry, 75, no. 11 (2006):1953-1955,
https://doi.org/10.1016/j.radphyschem.2005.07.046 . .

TY  - CONF
AU  - Arsenović, Dušan
AU  - Davidović, Dragomir M.
AU  - Vukanić, Jovan V.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6634
AB  - A Monte Carlo-based program for treatment of photon transport, restricted to photon energies used in medical diagnostics, is developed. Only the photoabsorption and Compton scattering of photons are taken into account, a justifiable assumption for the energies involved. We can simply separate contributions of reflection events with one, two, three, or more successive collisions of X-rays with electrons of the target. This gives us insights and information about photon transport which otherwise would be inaccessible. (c) 2006 Elsevier Ltd. All rights reserved.
C3  - Radiation Physics and Chemistry
T1  - A simple Monte Carlo program for simulation of X-ray transport
VL  - 75
IS  - 11
SP  - 1727
EP  - 1729
DO  - 10.1016/j.radphyschem.2005.07.031
ER  - 

@conference{
author = "Arsenović, Dušan and Davidović, Dragomir M. and Vukanić, Jovan V.",
year = "2006",
abstract = "A Monte Carlo-based program for treatment of photon transport, restricted to photon energies used in medical diagnostics, is developed. Only the photoabsorption and Compton scattering of photons are taken into account, a justifiable assumption for the energies involved. We can simply separate contributions of reflection events with one, two, three, or more successive collisions of X-rays with electrons of the target. This gives us insights and information about photon transport which otherwise would be inaccessible. (c) 2006 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "A simple Monte Carlo program for simulation of X-ray transport",
volume = "75",
number = "11",
pages = "1727-1729",
doi = "10.1016/j.radphyschem.2005.07.031"
}

Arsenović, D., Davidović, D. M.,& Vukanić, J. V.. (2006). A simple Monte Carlo program for simulation of X-ray transport. in Radiation Physics and Chemistry, 75(11), 1727-1729.
https://doi.org/10.1016/j.radphyschem.2005.07.031

Arsenović D, Davidović DM, Vukanić JV. A simple Monte Carlo program for simulation of X-ray transport. in Radiation Physics and Chemistry. 2006;75(11):1727-1729.
doi:10.1016/j.radphyschem.2005.07.031 .

Arsenović, Dušan, Davidović, Dragomir M., Vukanić, Jovan V., "A simple Monte Carlo program for simulation of X-ray transport" in Radiation Physics and Chemistry, 75, no. 11 (2006):1727-1729,
https://doi.org/10.1016/j.radphyschem.2005.07.031 . .

TY  - CONF
AU  - Davidović, Dragomir M.
AU  - Radojević, Vojislav
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6633
AB  - The photoionization of the L shell of lead (Pb, Z = 82) has been treated within the framework of the relativistic random-phase approximation (RRPA) in order to take into account electron correlations and relativistic effects. Calculations are performed in the energy region from 10 to 40 keV, what corresponds to ionization of the L-shell of Pb. We present results of calculations for total and partial cross sections together with photoelectron angular distribution anisotropy parameters of subshells. (c) 2006 Elsevier Ltd. All rights reserved.
C3  - Radiation Physics and Chemistry
T1  - The L-shell photoionization of atomic lead
VL  - 75
IS  - 11
SP  - 1522
EP  - 1524
DO  - 10.1016/j.radphyschem.2005.07.014
ER  - 

@conference{
author = "Davidović, Dragomir M. and Radojević, Vojislav",
year = "2006",
abstract = "The photoionization of the L shell of lead (Pb, Z = 82) has been treated within the framework of the relativistic random-phase approximation (RRPA) in order to take into account electron correlations and relativistic effects. Calculations are performed in the energy region from 10 to 40 keV, what corresponds to ionization of the L-shell of Pb. We present results of calculations for total and partial cross sections together with photoelectron angular distribution anisotropy parameters of subshells. (c) 2006 Elsevier Ltd. All rights reserved.",
journal = "Radiation Physics and Chemistry",
title = "The L-shell photoionization of atomic lead",
volume = "75",
number = "11",
pages = "1522-1524",
doi = "10.1016/j.radphyschem.2005.07.014"
}

Davidović, D. M.,& Radojević, V.. (2006). The L-shell photoionization of atomic lead. in Radiation Physics and Chemistry, 75(11), 1522-1524.
https://doi.org/10.1016/j.radphyschem.2005.07.014

Davidović DM, Radojević V. The L-shell photoionization of atomic lead. in Radiation Physics and Chemistry. 2006;75(11):1522-1524.
doi:10.1016/j.radphyschem.2005.07.014 .

Davidović, Dragomir M., Radojević, Vojislav, "The L-shell photoionization of atomic lead" in Radiation Physics and Chemistry, 75, no. 11 (2006):1522-1524,
https://doi.org/10.1016/j.radphyschem.2005.07.014 . .