TY  - JOUR
AU  - Davidović, Dragomir
AU  - Nađđerđ, Laslo
AU  - Stanković, Srboljub
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12157
AB  - In our recent paper [1] we have shown in detail that the Ehrenfest paradox is not a paradoxof the Special Theory of Relativity (STR). We also analysed the logical status of the widelyspread statement that “moving clocks go slow”. We underlined that very often these problemsare  treated  very  dogmatically.   On  the  example  of  Tyapkin’s  works  [2, 3]  we  describe  theregretable influence of dogmatic approach in the interpretation of the STR on the criticalthinking and approach
T2  - Bulletin of PFUR - Series Mathematics. Information Sciences. Physics
T1  - A Note on a Nonstandard Interpretation of the Special Theory of Relativity
IS  - 1
SP  - 116
EP  - 117
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12157
ER  - 

@article{
author = "Davidović, Dragomir and Nađđerđ, Laslo and Stanković, Srboljub",
year = "2011",
abstract = "In our recent paper [1] we have shown in detail that the Ehrenfest paradox is not a paradoxof the Special Theory of Relativity (STR). We also analysed the logical status of the widelyspread statement that “moving clocks go slow”. We underlined that very often these problemsare  treated  very  dogmatically.   On  the  example  of  Tyapkin’s  works  [2, 3]  we  describe  theregretable influence of dogmatic approach in the interpretation of the STR on the criticalthinking and approach",
journal = "Bulletin of PFUR - Series Mathematics. Information Sciences. Physics",
title = "A Note on a Nonstandard Interpretation of the Special Theory of Relativity",
number = "1",
pages = "116-117",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12157"
}

Davidović, D., Nađđerđ, L.,& Stanković, S.. (2011). A Note on a Nonstandard Interpretation of the Special Theory of Relativity. in Bulletin of PFUR - Series Mathematics. Information Sciences. Physics(1), 116-117.
https://hdl.handle.net/21.15107/rcub_vinar_12157

Davidović D, Nađđerđ L, Stanković S. A Note on a Nonstandard Interpretation of the Special Theory of Relativity. in Bulletin of PFUR - Series Mathematics. Information Sciences. Physics. 2011;(1):116-117.
https://hdl.handle.net/21.15107/rcub_vinar_12157 .

Davidović, Dragomir, Nađđerđ, Laslo, Stanković, Srboljub, "A Note on a Nonstandard Interpretation of the Special Theory of Relativity" in Bulletin of PFUR - Series Mathematics. Information Sciences. Physics, no. 1 (2011):116-117,
https://hdl.handle.net/21.15107/rcub_vinar_12157 .

TY  - CONF
AU  - Stanković, Srboljub
AU  - Ilić, Radovan
AU  - Kovačević, Milojko
AU  - Vukčević, Mladen
AU  - Davidović, Dragomir
AU  - Lazarević, Đorđe
AU  - Davidović, Miloš
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12265
AB  - U praksi projektovanja zaštite od zračenja na nuklearnim instalacijama (akceleratori, nuklearni reaktori, instalacije za protonsku terapiju u medicini, itd.) od interesa je proračun prinosa sekundarnih neutrona u odnosu na njihov energetski spektar i ugaonu distribuciju. Pored eksperimentalnog pristupa kada je u pitanju pre svega provera kvaliteta projektovane zaštite, tome prethodi izbor i primena odgovarajuće metode proračuna zaštite za definisani incidentni snop čestica i materijal mete. U ovom radu razmatra se ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV sa debelom metom od bakra.
PB  - Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 25. simpozijum DZZSCG : zbornik radova
T1  - Ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV Sa debelom metom od bakra
SP  - 151
EP  - 155
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12265
ER  - 

@conference{
author = "Stanković, Srboljub and Ilić, Radovan and Kovačević, Milojko and Vukčević, Mladen and Davidović, Dragomir and Lazarević, Đorđe and Davidović, Miloš",
year = "2009",
abstract = "U praksi projektovanja zaštite od zračenja na nuklearnim instalacijama (akceleratori, nuklearni reaktori, instalacije za protonsku terapiju u medicini, itd.) od interesa je proračun prinosa sekundarnih neutrona u odnosu na njihov energetski spektar i ugaonu distribuciju. Pored eksperimentalnog pristupa kada je u pitanju pre svega provera kvaliteta projektovane zaštite, tome prethodi izbor i primena odgovarajuće metode proračuna zaštite za definisani incidentni snop čestica i materijal mete. U ovom radu razmatra se ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV sa debelom metom od bakra.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "25. simpozijum DZZSCG : zbornik radova",
title = "Ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV Sa debelom metom od bakra",
pages = "151-155",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12265"
}

Stanković, S., Ilić, R., Kovačević, M., Vukčević, M., Davidović, D., Lazarević, Đ.,& Davidović, M.. (2009). Ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV Sa debelom metom od bakra. in 25. simpozijum DZZSCG : zbornik radova
Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore., 151-155.
https://hdl.handle.net/21.15107/rcub_vinar_12265

Stanković S, Ilić R, Kovačević M, Vukčević M, Davidović D, Lazarević Đ, Davidović M. Ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV Sa debelom metom od bakra. in 25. simpozijum DZZSCG : zbornik radova. 2009;:151-155.
https://hdl.handle.net/21.15107/rcub_vinar_12265 .

Stanković, Srboljub, Ilić, Radovan, Kovačević, Milojko, Vukčević, Mladen, Davidović, Dragomir, Lazarević, Đorđe, Davidović, Miloš, "Ugaona distribucija spektralne gustine neutrona prilikom interakcije snopa protona energije 50 MeV Sa debelom metom od bakra" in 25. simpozijum DZZSCG : zbornik radova (2009):151-155,
https://hdl.handle.net/21.15107/rcub_vinar_12265 .

TY  - JOUR
AU  - Davidović, Dragomir A.
AU  - Vukanić, Jovan V.
AU  - Arsenović, Dušan
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3370
AB  - The Chandrasekhars H functions play a central role in theoretical descriptions of radiative transfer in planetary and stellar atmospheres. In the present work our aim is to obtain in a simple way new analytic approximations of the Chandrasekhars function for isotropic scattering, which would be sufficiently simple but more accurate than the existing approximations. We apply the mean value theorem for definite integrals in the nonlinear integral equation for the Chandrasekhars H function. In this way the integral equation is formally solved but the solution depends on a new unknown parameter. We determine this parameter approximately, from the condition that the obtained H function matches the zero-order moment of the H function, which is known exactly, as accurately as possible in the whole range of the single particle albedo. The result gives our first analytic approximation for the H function. Using it as a starting approximation in the corresponding integral equation, after only one iteration which may be performed analytically, we obtain our second analytic approximation. The maximum relative error of our first analytic. approximation, which is very simple in structure, is below 2.5%. The accuracy of our second approximation is within 0.07%, so that it highly surpasses the accuracy of the other analytic approximations available in the literature. (c) 2007 Elsevier Inc. All rights reserved.
T2  - Icarus
T1  - Two new analytic approximations of the Chandrasekhars H function for isotropic scattering
VL  - 194
IS  - 1
SP  - 389
EP  - 397
DO  - 10.1016/j.icarus.2007.09.024
ER  - 

@article{
author = "Davidović, Dragomir A. and Vukanić, Jovan V. and Arsenović, Dušan",
year = "2008",
abstract = "The Chandrasekhars H functions play a central role in theoretical descriptions of radiative transfer in planetary and stellar atmospheres. In the present work our aim is to obtain in a simple way new analytic approximations of the Chandrasekhars function for isotropic scattering, which would be sufficiently simple but more accurate than the existing approximations. We apply the mean value theorem for definite integrals in the nonlinear integral equation for the Chandrasekhars H function. In this way the integral equation is formally solved but the solution depends on a new unknown parameter. We determine this parameter approximately, from the condition that the obtained H function matches the zero-order moment of the H function, which is known exactly, as accurately as possible in the whole range of the single particle albedo. The result gives our first analytic approximation for the H function. Using it as a starting approximation in the corresponding integral equation, after only one iteration which may be performed analytically, we obtain our second analytic approximation. The maximum relative error of our first analytic. approximation, which is very simple in structure, is below 2.5%. The accuracy of our second approximation is within 0.07%, so that it highly surpasses the accuracy of the other analytic approximations available in the literature. (c) 2007 Elsevier Inc. All rights reserved.",
journal = "Icarus",
title = "Two new analytic approximations of the Chandrasekhars H function for isotropic scattering",
volume = "194",
number = "1",
pages = "389-397",
doi = "10.1016/j.icarus.2007.09.024"
}

Davidović, D. A., Vukanić, J. V.,& Arsenović, D.. (2008). Two new analytic approximations of the Chandrasekhars H function for isotropic scattering. in Icarus, 194(1), 389-397.
https://doi.org/10.1016/j.icarus.2007.09.024

Davidović DA, Vukanić JV, Arsenović D. Two new analytic approximations of the Chandrasekhars H function for isotropic scattering. in Icarus. 2008;194(1):389-397.
doi:10.1016/j.icarus.2007.09.024 .

Davidović, Dragomir A., Vukanić, Jovan V., Arsenović, Dušan, "Two new analytic approximations of the Chandrasekhars H function for isotropic scattering" in Icarus, 194, no. 1 (2008):389-397,
https://doi.org/10.1016/j.icarus.2007.09.024 . .

TY  - CONF
AU  - Davidović, Dragomir
AU  - Vukanić, Jovan
AU  - Arsenović, Dušan
AU  - Stanković, Srboljub
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12262
AB  - Analizirani su uslovi pod kojima se prolazak i refleksija rendgenskih zraka, korišćenih u industriji i medicni, mogu uz visoku tačnost tretirati kao transport čestica koje se mnogostruko rasejavaju, i to izotropno i bez gubitaka energije. Na jednostavan i fizički pregledan način izvedena je integralna jednačina koja opisuje refleksiju za taj slučaj, razjašnjen fizički smisao njenih pojedinih članova, kao i njena rešenja. Navedene su činjenice koje potvrđuju ovakav model transporta.
AB  - Conditions under which the penetration and reflections of Roentgen rays, used in industry and medical physics, can be treated with a high accuracy as a monoenergetic, multiple collision type of particle beam transport with isotropic scattering, are analysed. In a simple an physicaly transparent way the transport equation describing the reflection of Xrays, for this case, has been derived and the physical meaning of the separate terms of the equation have been discussed. The facts which confirm this physical picture are supplied.
PB  - Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore
C3  - 24. simpozijum DZZSCG : zbornik radova
T1  - Teorija refleksije rendgenskih zraka korišćenih u industriji i medicini
T1  - A theory of the reflection of roentgen rays used in industry and medical physics
SP  - 239
EP  - 243
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12262
ER  - 

@conference{
author = "Davidović, Dragomir and Vukanić, Jovan and Arsenović, Dušan and Stanković, Srboljub",
year = "2007",
abstract = "Analizirani su uslovi pod kojima se prolazak i refleksija rendgenskih zraka, korišćenih u industriji i medicni, mogu uz visoku tačnost tretirati kao transport čestica koje se mnogostruko rasejavaju, i to izotropno i bez gubitaka energije. Na jednostavan i fizički pregledan način izvedena je integralna jednačina koja opisuje refleksiju za taj slučaj, razjašnjen fizički smisao njenih pojedinih članova, kao i njena rešenja. Navedene su činjenice koje potvrđuju ovakav model transporta., Conditions under which the penetration and reflections of Roentgen rays, used in industry and medical physics, can be treated with a high accuracy as a monoenergetic, multiple collision type of particle beam transport with isotropic scattering, are analysed. In a simple an physicaly transparent way the transport equation describing the reflection of Xrays, for this case, has been derived and the physical meaning of the separate terms of the equation have been discussed. The facts which confirm this physical picture are supplied.",
publisher = "Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore",
journal = "24. simpozijum DZZSCG : zbornik radova",
title = "Teorija refleksije rendgenskih zraka korišćenih u industriji i medicini, A theory of the reflection of roentgen rays used in industry and medical physics",
pages = "239-243",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12262"
}

Davidović, D., Vukanić, J., Arsenović, D.,& Stanković, S.. (2007). Teorija refleksije rendgenskih zraka korišćenih u industriji i medicini. in 24. simpozijum DZZSCG : zbornik radova
Beograd : Institut za nuklearne nauke "Vinča" : Društvo za zaštitu od zračenja Srbije i Crne Gore., 239-243.
https://hdl.handle.net/21.15107/rcub_vinar_12262

Davidović D, Vukanić J, Arsenović D, Stanković S. Teorija refleksije rendgenskih zraka korišćenih u industriji i medicini. in 24. simpozijum DZZSCG : zbornik radova. 2007;:239-243.
https://hdl.handle.net/21.15107/rcub_vinar_12262 .

Davidović, Dragomir, Vukanić, Jovan, Arsenović, Dušan, Stanković, Srboljub, "Teorija refleksije rendgenskih zraka korišćenih u industriji i medicini" in 24. simpozijum DZZSCG : zbornik radova (2007):239-243,
https://hdl.handle.net/21.15107/rcub_vinar_12262 .