TY  - JOUR
AU  - Linić, Suzana
AU  - Lučanin, Vojkan J.
AU  - Živković, Srđan P.
AU  - Raković, Marko
AU  - Ristić, Slavica S.
AU  - Radojković, Bojana
AU  - Polić, Suzana R.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4240
AB  - A multidisciplinary research method was employed with the intention to create a series of bio-inspired flattened airfoils, observe their aerodynamic characteristics, and analyse their applicability to small devices or to designs of high-speed trains, within the shortest period in the conceptual stage. A research specimen of a kingfisher, selected for biomimicry, was examined with the following methods: visual inspection, analysis of photographs, manufacturing quality control measurement with a 3D laser scanner, and microscopy. A basic multi-arc-line profile, re-engineered from the overlapped specimen shape data and based on the observations, was used for designing a series of seven derived airfoils. The aerodynamic characteristics of the bio-inspired airfoils were obtained with the panel methods at low and moderate subsonic speeds, while the small transonic difference method was used in the high-subsonic speed range. Basic and ellipse-like airfoils produce higher total drag at low and moderate velocities and higher forebody drag in the high-subsonic range when compared to derived and parabola-like airfoils. The obtained critical Mach numbers are in the range from 0.76 to 0.78, where three bionic airfoils show values equal to or smaller than the values of ellipse- and parabola-like airfoils. The profile with the shortest bio-inspired relative chord has a higher critical Mach number value than the parabola-like profile. The sonic lines above these profiles appear at close positions. The applied set of examination methods of the bio-inspired design is not time consuming and produces sufficiently good results in the conceptual stage. Therefore, a further development of unique and adjusted numerical methods and codes at pre-computational fluid dynamics run is encouraged, together with shape parameterization.
PB  - Springer Nature Switzerland AG 2020
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage
VL  - 43
IS  - 1
SP  - 57
DO  - 10.1007/s40430-020-02789-2
ER  - 

@article{
author = "Linić, Suzana and Lučanin, Vojkan J. and Živković, Srđan P. and Raković, Marko and Ristić, Slavica S. and Radojković, Bojana and Polić, Suzana R.",
year = "2021",
abstract = "A multidisciplinary research method was employed with the intention to create a series of bio-inspired flattened airfoils, observe their aerodynamic characteristics, and analyse their applicability to small devices or to designs of high-speed trains, within the shortest period in the conceptual stage. A research specimen of a kingfisher, selected for biomimicry, was examined with the following methods: visual inspection, analysis of photographs, manufacturing quality control measurement with a 3D laser scanner, and microscopy. A basic multi-arc-line profile, re-engineered from the overlapped specimen shape data and based on the observations, was used for designing a series of seven derived airfoils. The aerodynamic characteristics of the bio-inspired airfoils were obtained with the panel methods at low and moderate subsonic speeds, while the small transonic difference method was used in the high-subsonic speed range. Basic and ellipse-like airfoils produce higher total drag at low and moderate velocities and higher forebody drag in the high-subsonic range when compared to derived and parabola-like airfoils. The obtained critical Mach numbers are in the range from 0.76 to 0.78, where three bionic airfoils show values equal to or smaller than the values of ellipse- and parabola-like airfoils. The profile with the shortest bio-inspired relative chord has a higher critical Mach number value than the parabola-like profile. The sonic lines above these profiles appear at close positions. The applied set of examination methods of the bio-inspired design is not time consuming and produces sufficiently good results in the conceptual stage. Therefore, a further development of unique and adjusted numerical methods and codes at pre-computational fluid dynamics run is encouraged, together with shape parameterization.",
publisher = "Springer Nature Switzerland AG 2020",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage",
volume = "43",
number = "1",
pages = "57",
doi = "10.1007/s40430-020-02789-2"
}

Linić, S., Lučanin, V. J., Živković, S. P., Raković, M., Ristić, S. S., Radojković, B.,& Polić, S. R.. (2021). Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage. in Journal of the Brazilian Society of Mechanical Sciences and Engineering
Springer Nature Switzerland AG 2020., 43(1), 57.
https://doi.org/10.1007/s40430-020-02789-2

Linić S, Lučanin VJ, Živković SP, Raković M, Ristić SS, Radojković B, Polić SR. Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2021;43(1):57.
doi:10.1007/s40430-020-02789-2 .

Linić, Suzana, Lučanin, Vojkan J., Živković, Srđan P., Raković, Marko, Ristić, Slavica S., Radojković, Bojana, Polić, Suzana R., "Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 43, no. 1 (2021):57,
https://doi.org/10.1007/s40430-020-02789-2 . .

TY  - JOUR
AU  - Linić, Suzana
AU  - Linić, Mihailo S.
AU  - Radojković, Bojana
AU  - Ristić, Slavica S.
AU  - Jegdić, Bore
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4778
AB  - This paper presents a study of a free convection flow around the walls of a ventilation mill of the Thermal Power Plant “Kostolac B”, Kostolac, Serbia. A combined method consists of thermography and software post-processing, PATS. The PATS is specially developed for recognition of turbulence zones by the custom processing of large input data sets from thermal videos. The calculations determine maximum temperature fluctuation i.e. peak-to-peak fluctuation at every spot during the recording time. Three thermal videos of the walls were analyzed. Maximum temperature fluctuation occurred in the zones close to the obstacles, which are thus recognized as one of the main sources of turbulence. Besides, PATS has recognized fine camera oscillations and mechanical movements of a flexible material near the dozer wall. The detected zones of turbulence correspond to the previous studies and to the theory. The method shows good potential in the field of free convective flow research through the improvement of testing efficiency and cost savings. State-of-the-art thermograph cameras and updated software are recommended.
PB  - Serbia : Serbian Society of Heat Transfer Engineers
T2  - Thermal Science
T1  - Turbulence recognition in free convective flow by thermal - video post -processing in the case of a thermal power plant mill
VL  - 25
IS  - 4
SP  - 2447
EP  - 2458
DO  - 10.2298/TSCI200907341L
ER  - 

@article{
author = "Linić, Suzana and Linić, Mihailo S. and Radojković, Bojana and Ristić, Slavica S. and Jegdić, Bore",
year = "2021",
abstract = "This paper presents a study of a free convection flow around the walls of a ventilation mill of the Thermal Power Plant “Kostolac B”, Kostolac, Serbia. A combined method consists of thermography and software post-processing, PATS. The PATS is specially developed for recognition of turbulence zones by the custom processing of large input data sets from thermal videos. The calculations determine maximum temperature fluctuation i.e. peak-to-peak fluctuation at every spot during the recording time. Three thermal videos of the walls were analyzed. Maximum temperature fluctuation occurred in the zones close to the obstacles, which are thus recognized as one of the main sources of turbulence. Besides, PATS has recognized fine camera oscillations and mechanical movements of a flexible material near the dozer wall. The detected zones of turbulence correspond to the previous studies and to the theory. The method shows good potential in the field of free convective flow research through the improvement of testing efficiency and cost savings. State-of-the-art thermograph cameras and updated software are recommended.",
publisher = "Serbia : Serbian Society of Heat Transfer Engineers",
journal = "Thermal Science",
title = "Turbulence recognition in free convective flow by thermal - video post -processing in the case of a thermal power plant mill",
volume = "25",
number = "4",
pages = "2447-2458",
doi = "10.2298/TSCI200907341L"
}

Linić, S., Linić, M. S., Radojković, B., Ristić, S. S.,& Jegdić, B.. (2021). Turbulence recognition in free convective flow by thermal - video post -processing in the case of a thermal power plant mill. in Thermal Science
Serbia : Serbian Society of Heat Transfer Engineers., 25(4), 2447-2458.
https://doi.org/10.2298/TSCI200907341L

Linić S, Linić MS, Radojković B, Ristić SS, Jegdić B. Turbulence recognition in free convective flow by thermal - video post -processing in the case of a thermal power plant mill. in Thermal Science. 2021;25(4):2447-2458.
doi:10.2298/TSCI200907341L .

Linić, Suzana, Linić, Mihailo S., Radojković, Bojana, Ristić, Slavica S., Jegdić, Bore, "Turbulence recognition in free convective flow by thermal - video post -processing in the case of a thermal power plant mill" in Thermal Science, 25, no. 4 (2021):2447-2458,
https://doi.org/10.2298/TSCI200907341L . .

TY  - CONF
AU  - Radojković, Bojana M.
AU  - Jegdić, Bore
AU  - Ristić, Slavica S.
AU  - Bobić, Biljana M.
AU  - Polić, Suzana R.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5445
AB  - Different types of weapons and military equipment, made of brass, are often exposed to extreme atmospheric conditions, to chemical agents, erosion and wear. It is important to evaluate the corrosion characteristics of brass in different corrosive environments, and especially after laser cleaning of corrosion products, various deposits and other undesirable surface layers. The brass corrosion resistance changes, after surface laser cleaning, were examined in this paper. Nd:YAG laser with lambda=1064 nm was used for laser cleaning process. SEM analysis was applied for investigation of the brass surface micro-morphology before and after laser cleaning. Electrochemical techniques such as linear polarization resistance, electrochemical impedance spectroscopy, linear sweep voltammetry and electrochemical frequency modification were used to study the corrosion characteristics of laser treated and mechanically prepared brass surface. The results of electrochemical tests have shown that the corrosion rate of laser treated brass surface is approximately same as the corrosion rate of brass surface prepared by the standard grinding and degreasing process. This indicates that the brass surface was efficiently cleaned by laser treatment with applied operating parameters without lowering its corrosion resistance. The abilities of different electrochemical methods for determination of corrosion rate were compared.
PB  - The Military Technical Institute Belgrade
C3  - Proceedings - 8th International scientific conference on defensive technologies OTEH 2018, 11-12.10.2018, Belgrade
T1  - Corrosion characteristics of laser cleaned brass surfaces
VL  - 8
SP  - 456
EP  - 461
UR  - https://hdl.handle.net/21.15107/rcub_cer_5445
ER  - 

@conference{
author = "Radojković, Bojana M. and Jegdić, Bore and Ristić, Slavica S. and Bobić, Biljana M. and Polić, Suzana R.",
year = "2018",
abstract = "Different types of weapons and military equipment, made of brass, are often exposed to extreme atmospheric conditions, to chemical agents, erosion and wear. It is important to evaluate the corrosion characteristics of brass in different corrosive environments, and especially after laser cleaning of corrosion products, various deposits and other undesirable surface layers. The brass corrosion resistance changes, after surface laser cleaning, were examined in this paper. Nd:YAG laser with lambda=1064 nm was used for laser cleaning process. SEM analysis was applied for investigation of the brass surface micro-morphology before and after laser cleaning. Electrochemical techniques such as linear polarization resistance, electrochemical impedance spectroscopy, linear sweep voltammetry and electrochemical frequency modification were used to study the corrosion characteristics of laser treated and mechanically prepared brass surface. The results of electrochemical tests have shown that the corrosion rate of laser treated brass surface is approximately same as the corrosion rate of brass surface prepared by the standard grinding and degreasing process. This indicates that the brass surface was efficiently cleaned by laser treatment with applied operating parameters without lowering its corrosion resistance. The abilities of different electrochemical methods for determination of corrosion rate were compared.",
publisher = "The Military Technical Institute Belgrade",
journal = "Proceedings - 8th International scientific conference on defensive technologies OTEH 2018, 11-12.10.2018, Belgrade",
title = "Corrosion characteristics of laser cleaned brass surfaces",
volume = "8",
pages = "456-461",
url = "https://hdl.handle.net/21.15107/rcub_cer_5445"
}

Radojković, B. M., Jegdić, B., Ristić, S. S., Bobić, B. M.,& Polić, S. R.. (2018). Corrosion characteristics of laser cleaned brass surfaces. in Proceedings - 8th International scientific conference on defensive technologies OTEH 2018, 11-12.10.2018, Belgrade
The Military Technical Institute Belgrade., 8, 456-461.
https://hdl.handle.net/21.15107/rcub_cer_5445

Radojković BM, Jegdić B, Ristić SS, Bobić BM, Polić SR. Corrosion characteristics of laser cleaned brass surfaces. in Proceedings - 8th International scientific conference on defensive technologies OTEH 2018, 11-12.10.2018, Belgrade. 2018;8:456-461.
https://hdl.handle.net/21.15107/rcub_cer_5445 .

Radojković, Bojana M., Jegdić, Bore, Ristić, Slavica S., Bobić, Biljana M., Polić, Suzana R., "Corrosion characteristics of laser cleaned brass surfaces" in Proceedings - 8th International scientific conference on defensive technologies OTEH 2018, 11-12.10.2018, Belgrade, 8 (2018):456-461,
https://hdl.handle.net/21.15107/rcub_cer_5445 .

TY  - BOOK
AU  - Ristić, Slavica S.
AU  - Radojković, Bojana
AU  - Polić, Suzana R.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2631
AB  - The monograph presents the results of perennial research of laser application in the cleaning of undesirable layers on cultural heritage objects. Keeping in mind the priceless value of the items that have to be cleaned, research has been carried out with the aim of provide a scientifically based contribution to the safe and efficient application of lasers in conservation laboratories.
Laser cleaning is a complex phenomenon that is followed by thermal, mechanical, optical, and chemical effects. Investigation of the laser light interaction with different materials is the first step in the process of successful laser application in the protection of cultural heritage objects. These processes depend on the characteristics of laser irradiation and materials characteristics. The results presented in this monograph included four types of lasers: Nd:YAG, CO2, Er:Glass and ruby laser. Laser irradiation parameters such as beam energy density (fluence), pulse length, number of pulses per second, wavelength and energy distribution within the laser beam are changed. Archaeological objects, samples from museums study collections and samples of contemporary materials (modern ceramics, metals, metal alloys, glass, textiles and a combination of these materials) have been cleaned. Each sample from the cultural heritage collection represents a unique conservation challenge because it has the inherent values of the reflection and absorption coefficients, the chemical and physical properties of the surface, the specific topology at the micro and nano levels, the homogeneity, the thermal expansion coefficient, the melting temperature, and the boiling temperature. Cleaning each of the items requires a proper selection of operating parameters and process control.
Morphological and chemical changes in the cleaned zones were examined by optical and SEM microscopy, EDX, XRF, XRD and LIBS analysis. The analysis of cleansing effects includes colorimetric tests, roughness and micro-hardness testing. Other modern methods for monitoring the interaction process (thermography) were also used, and experimental results were processed and verified by numerical methods.
Over the past decade, a number of European projects, related to the development and application of new scientific methods and new technologies in the protection of cultural heritage, have been implemented. Our country, rich in cultural heritage, should follow this trend of using modern technology and so in the best way preserve archaeological and cultural heritage for its descendants.
AB  - U monografiji su prikazani rezultati višegodišnjih istraživanja u oblasti primene lasera u čišćenju nepoželjnih slojeva na predmetima kulturne baštine. Imajući u vidu da baštini pripadaju i predmeti neprocenjive vrednosti, istraživanja su sprovedena s ciljem da se pruži naučno zasnovani doprinos bezbednoj i efikasnoj primeni lasera u konzervatorskim ateljeima. 
Lasersko čišćenje je kompleksna pojava koju prate toplotni, mehanički, optički i hemijski efekti. Ispitivanje interakcije laserske svetlosti sa različitim materijalima je prvi korak u procesu uspešne primene lasera u zaštiti objekata kulturne baštine. Ovi procesi zavise od karakteristike laserskog zračenja i materijala. Istraživanja, čiji su rezultati prikazani u ovoj monografiji, uključila su četiri tipa lasera: Nd:YAG, CO2, ER:Glass i rubinski laser.  Varirani su  parametri laserskog zračenja,  kao što su gustina energije snopa (fluenca), dužina impulsa, broj impulsa u sekundi, talasna dužina i raspodela energije unutar laserskog snopa. Čišćeni su arheološki predmeti, uzorci iz muzejskih studijskih zbirki i uzorci savremenih materijala (keramika, metali, metalne legure, staklo, tekstil i kombinaciju ovih materijala) kakvi se koriste u savremenoj umetnosti. Svaki uzorak iz zbirke kulturne baštine predstavlja jedinstven konzervacijski problem, jer ima svojstvene vrednosti koeficijenta refleksije i apsorpcije, hemijske i fizičke osobine površine, specifičnu topologiju na mikro i nano nivou, homogenost, koeficijent širenja toplote, temperaturu topljenja i temperaturu ključanja. Čišćenje svakog predmeta zahteva pravilan izbor radnih parametara i kontrolu procesa.
Morfološke i hemijske promene u zonama čišćenja, ispitivane su optičkom i SEM mikroskopijom, EDX, XRF i XRD analizom. Dijagnostika efekata čišćenja uključila je i kolorimetrijska ispitivanja, ispitivanja hrapavosti i mikrotvrdoće. Korišćene su i druge savremene metode za praćenje procesa interakcije (termografija), a eksperimentalni rezultati su obrađivani i verifikovani numeričkim metodama.
U proteklih desetak godina realizovan je veliki broj evropskih projekata, koji se odnose na razvoj i primenu novih naučnih metoda i novih tehnologija u zaštiti kulturne baštine. Naša zemlja, bogata kulturnim nasleđem, treba da prati ovaj trend korišćenja savremenih tehnologija i tako na najbolji način sačuva arheološko i kulturno nasleđe za budućnost.
PB  - Beograd : Naučna ustanova za hemiju, tehnologiju i metalurgiju, Institut od nacionalnog značaja
PB  - Beograd : Centralni institut za konzervaciju
T1  - Savremene metode laserskog čišćenja predmeta kulturnog nasledja
UR  - https://hdl.handle.net/21.15107/rcub_cer_2631
ER  - 

@book{
author = "Ristić, Slavica S. and Radojković, Bojana and Polić, Suzana R.",
year = "2018",
abstract = "The monograph presents the results of perennial research of laser application in the cleaning of undesirable layers on cultural heritage objects. Keeping in mind the priceless value of the items that have to be cleaned, research has been carried out with the aim of provide a scientifically based contribution to the safe and efficient application of lasers in conservation laboratories.
Laser cleaning is a complex phenomenon that is followed by thermal, mechanical, optical, and chemical effects. Investigation of the laser light interaction with different materials is the first step in the process of successful laser application in the protection of cultural heritage objects. These processes depend on the characteristics of laser irradiation and materials characteristics. The results presented in this monograph included four types of lasers: Nd:YAG, CO2, Er:Glass and ruby laser. Laser irradiation parameters such as beam energy density (fluence), pulse length, number of pulses per second, wavelength and energy distribution within the laser beam are changed. Archaeological objects, samples from museums study collections and samples of contemporary materials (modern ceramics, metals, metal alloys, glass, textiles and a combination of these materials) have been cleaned. Each sample from the cultural heritage collection represents a unique conservation challenge because it has the inherent values of the reflection and absorption coefficients, the chemical and physical properties of the surface, the specific topology at the micro and nano levels, the homogeneity, the thermal expansion coefficient, the melting temperature, and the boiling temperature. Cleaning each of the items requires a proper selection of operating parameters and process control.
Morphological and chemical changes in the cleaned zones were examined by optical and SEM microscopy, EDX, XRF, XRD and LIBS analysis. The analysis of cleansing effects includes colorimetric tests, roughness and micro-hardness testing. Other modern methods for monitoring the interaction process (thermography) were also used, and experimental results were processed and verified by numerical methods.
Over the past decade, a number of European projects, related to the development and application of new scientific methods and new technologies in the protection of cultural heritage, have been implemented. Our country, rich in cultural heritage, should follow this trend of using modern technology and so in the best way preserve archaeological and cultural heritage for its descendants., U monografiji su prikazani rezultati višegodišnjih istraživanja u oblasti primene lasera u čišćenju nepoželjnih slojeva na predmetima kulturne baštine. Imajući u vidu da baštini pripadaju i predmeti neprocenjive vrednosti, istraživanja su sprovedena s ciljem da se pruži naučno zasnovani doprinos bezbednoj i efikasnoj primeni lasera u konzervatorskim ateljeima. 
Lasersko čišćenje je kompleksna pojava koju prate toplotni, mehanički, optički i hemijski efekti. Ispitivanje interakcije laserske svetlosti sa različitim materijalima je prvi korak u procesu uspešne primene lasera u zaštiti objekata kulturne baštine. Ovi procesi zavise od karakteristike laserskog zračenja i materijala. Istraživanja, čiji su rezultati prikazani u ovoj monografiji, uključila su četiri tipa lasera: Nd:YAG, CO2, ER:Glass i rubinski laser.  Varirani su  parametri laserskog zračenja,  kao što su gustina energije snopa (fluenca), dužina impulsa, broj impulsa u sekundi, talasna dužina i raspodela energije unutar laserskog snopa. Čišćeni su arheološki predmeti, uzorci iz muzejskih studijskih zbirki i uzorci savremenih materijala (keramika, metali, metalne legure, staklo, tekstil i kombinaciju ovih materijala) kakvi se koriste u savremenoj umetnosti. Svaki uzorak iz zbirke kulturne baštine predstavlja jedinstven konzervacijski problem, jer ima svojstvene vrednosti koeficijenta refleksije i apsorpcije, hemijske i fizičke osobine površine, specifičnu topologiju na mikro i nano nivou, homogenost, koeficijent širenja toplote, temperaturu topljenja i temperaturu ključanja. Čišćenje svakog predmeta zahteva pravilan izbor radnih parametara i kontrolu procesa.
Morfološke i hemijske promene u zonama čišćenja, ispitivane su optičkom i SEM mikroskopijom, EDX, XRF i XRD analizom. Dijagnostika efekata čišćenja uključila je i kolorimetrijska ispitivanja, ispitivanja hrapavosti i mikrotvrdoće. Korišćene su i druge savremene metode za praćenje procesa interakcije (termografija), a eksperimentalni rezultati su obrađivani i verifikovani numeričkim metodama.
U proteklih desetak godina realizovan je veliki broj evropskih projekata, koji se odnose na razvoj i primenu novih naučnih metoda i novih tehnologija u zaštiti kulturne baštine. Naša zemlja, bogata kulturnim nasleđem, treba da prati ovaj trend korišćenja savremenih tehnologija i tako na najbolji način sačuva arheološko i kulturno nasleđe za budućnost.",
publisher = "Beograd : Naučna ustanova za hemiju, tehnologiju i metalurgiju, Institut od nacionalnog značaja, Beograd : Centralni institut za konzervaciju",
title = "Savremene metode laserskog čišćenja predmeta kulturnog nasledja",
url = "https://hdl.handle.net/21.15107/rcub_cer_2631"
}

Ristić, S. S., Radojković, B.,& Polić, S. R.. (2018). Savremene metode laserskog čišćenja predmeta kulturnog nasledja. 
Beograd : Naučna ustanova za hemiju, tehnologiju i metalurgiju, Institut od nacionalnog značaja..
https://hdl.handle.net/21.15107/rcub_cer_2631

Ristić SS, Radojković B, Polić SR. Savremene metode laserskog čišćenja predmeta kulturnog nasledja. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_2631 .

Ristić, Slavica S., Radojković, Bojana, Polić, Suzana R., "Savremene metode laserskog čišćenja predmeta kulturnog nasledja" (2018),
https://hdl.handle.net/21.15107/rcub_cer_2631 .

TY  - JOUR
AU  - Ristić, Slavica S.
AU  - Polić, Suzana R.
AU  - Radojković, Bojana
AU  - Linić, Suzana
AU  - Bikić, Vesna
AU  - Jegdić, Bore
AU  - Pavlović, Miloš
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2280
AB  - The paper presents the results of laser cleaning of corrosive and other deposits on a metal archaeological artefact from the Danube. Nd: YAG laser, energy up to 750 mJ and wavelengths λ = 1064 nm and 532 nm is used. The cleaning efficiency was examined in the function of laser energy, wavelength, and number of pulses, i.e. the time of exposure and moist of the surface of the sample. The results of removal of unwanted layers from the surface of the artefact and morphological changes on the base material were examined by optical and scanning electronic microscopy (OM and SEM). Micro-chemical changes have been determined by energy dispersive X-ray analysis (EDX) and x-ray fluorescence spectrometry (XRF). It has been shown that λ = 532 nm has higher efficiency for cleaning this sample and that the surface moisture has very small influence on laser cleaning efficiency. Research carried out on the archaeological object from the Danube shows that the application of lasers in the cleaning of undesirable layers is very efficient, safe and environmentally friendly.
AB  - U radu su prikazani rezultati laserskog čišćenja korozivnih i drugih naslaga na metalnom arheološkom predmetu koji je nađen u Dunavu. Korišćen je Nd:YAG laser, energije do 750mJ i talasne dužine λ=1064nm i 532nm. Efikasnost čišćenja je ispitivana u funkciji energije lasera, talasne dužine, broja impulsa, odnosno vremena eksponiranja i vlažnosti površine uzorka. Rezultati skidanja nepoželjnih slojeva sa površine uzorka, kao i morfoloških promena na osnovnom materijalu, ispitivani su optičkom i skenirajućom elektronskom mikroskopijom ( OM i SEM), a ispitivanje mikrohemijskih promena izvršeno je pomoću energijske disperzione spektrometrijske analize (EDX) i rendgensko fluorescentnom spektroskopijom (XRF). Pokazano je da za čišćenje ovog uzorka veću efikasnost ima λ= 532nm i da je uticaj vlažnosti površine na efikasnost laserskog čišćenja veoma mali. Istraživanja obavljena na arheološkom uzorku iz Dunava, pokazuju da je primena lasera u čišćenju nepoželjnih slojeva veoma efikasna, bezbedna i ekološki prihvatljiva.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Laser cleaning of the archaeological metal sample from the Danube
T1  - Istraživanje mogućnosti primene lasera u čišćenju arheoloških metalnih predmeta
VL  - 59
IS  - 3
SP  - 410
EP  - 421
DO  - 10.5937/zasmat1803410R
ER  - 

@article{
author = "Ristić, Slavica S. and Polić, Suzana R. and Radojković, Bojana and Linić, Suzana and Bikić, Vesna and Jegdić, Bore and Pavlović, Miloš",
year = "2018",
abstract = "The paper presents the results of laser cleaning of corrosive and other deposits on a metal archaeological artefact from the Danube. Nd: YAG laser, energy up to 750 mJ and wavelengths λ = 1064 nm and 532 nm is used. The cleaning efficiency was examined in the function of laser energy, wavelength, and number of pulses, i.e. the time of exposure and moist of the surface of the sample. The results of removal of unwanted layers from the surface of the artefact and morphological changes on the base material were examined by optical and scanning electronic microscopy (OM and SEM). Micro-chemical changes have been determined by energy dispersive X-ray analysis (EDX) and x-ray fluorescence spectrometry (XRF). It has been shown that λ = 532 nm has higher efficiency for cleaning this sample and that the surface moisture has very small influence on laser cleaning efficiency. Research carried out on the archaeological object from the Danube shows that the application of lasers in the cleaning of undesirable layers is very efficient, safe and environmentally friendly., U radu su prikazani rezultati laserskog čišćenja korozivnih i drugih naslaga na metalnom arheološkom predmetu koji je nađen u Dunavu. Korišćen je Nd:YAG laser, energije do 750mJ i talasne dužine λ=1064nm i 532nm. Efikasnost čišćenja je ispitivana u funkciji energije lasera, talasne dužine, broja impulsa, odnosno vremena eksponiranja i vlažnosti površine uzorka. Rezultati skidanja nepoželjnih slojeva sa površine uzorka, kao i morfoloških promena na osnovnom materijalu, ispitivani su optičkom i skenirajućom elektronskom mikroskopijom ( OM i SEM), a ispitivanje mikrohemijskih promena izvršeno je pomoću energijske disperzione spektrometrijske analize (EDX) i rendgensko fluorescentnom spektroskopijom (XRF). Pokazano je da za čišćenje ovog uzorka veću efikasnost ima λ= 532nm i da je uticaj vlažnosti površine na efikasnost laserskog čišćenja veoma mali. Istraživanja obavljena na arheološkom uzorku iz Dunava, pokazuju da je primena lasera u čišćenju nepoželjnih slojeva veoma efikasna, bezbedna i ekološki prihvatljiva.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Laser cleaning of the archaeological metal sample from the Danube, Istraživanje mogućnosti primene lasera u čišćenju arheoloških metalnih predmeta",
volume = "59",
number = "3",
pages = "410-421",
doi = "10.5937/zasmat1803410R"
}

Ristić, S. S., Polić, S. R., Radojković, B., Linić, S., Bikić, V., Jegdić, B.,& Pavlović, M.. (2018). Laser cleaning of the archaeological metal sample from the Danube. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 59(3), 410-421.
https://doi.org/10.5937/zasmat1803410R

Ristić SS, Polić SR, Radojković B, Linić S, Bikić V, Jegdić B, Pavlović M. Laser cleaning of the archaeological metal sample from the Danube. in Zaštita materijala. 2018;59(3):410-421.
doi:10.5937/zasmat1803410R .

Ristić, Slavica S., Polić, Suzana R., Radojković, Bojana, Linić, Suzana, Bikić, Vesna, Jegdić, Bore, Pavlović, Miloš, "Laser cleaning of the archaeological metal sample from the Danube" in Zaštita materijala, 59, no. 3 (2018):410-421,
https://doi.org/10.5937/zasmat1803410R . .

TY  - JOUR
AU  - Linić, Suzana
AU  - Ocokoljić, Goran J.
AU  - Ristić, Slavica S.
AU  - Lučanin, Vojkan J.
AU  - Kozić, Mirko S.
AU  - Rašuo, Boško
AU  - Jegdić, Bore
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2309
AB  - Methods of diagnosing aerodynamic characteristics are constantly developing in order to conduct the precise and energy efficient wind tunnel testing of transport vehicles in the prototype design early stages. This is of a special importance when facing the time/cost consumption problems of detection of the transition zone over the simplified design of the high-speed train. Herein the applied thermodynamics found a very significant role in the field of experimental aerodynamics. With the intention of detecting the boundary-layer transition zone the following measurements were applied: the infrared thermography, flow visualization, and drag force measurements. In addition, the CFD was applied to predict the flow behaviour and transition zone, solving PDE consisting of the Reynolds-averaged Navier-Stokes equations, energy equation, and the equation of state for an ideal gas employing density-based solver. The thermal imaging defined the transition zone by simple application, and fast recognition, while the transition bounds were defined in the analysis. The flow visualization confirmed thermography results and the method itself as favourable, especially in the most expensive early phases of redesigning for aerodynamically optimized and energy efficient solutions. The numerical method was confirmed by the experiments, resulting in acceptable differences in the definition of the transition zone. For a better understanding of the phenomenon, the overlapped implementation of the presented methods focused on forced convection showed as the best solution. Based on the experiences of this research, development of the additional equipment and adjustments will be introduced in the future experiments.
PB  - Belgrade : VINČA Institute of Nuclear Sciences
T2  - Thermal Science
T1  - Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test
VL  - 22
IS  - 2
SP  - 1137
EP  - 1148
DO  - 10.2298/TSCI170619302L
ER  - 

@article{
author = "Linić, Suzana and Ocokoljić, Goran J. and Ristić, Slavica S. and Lučanin, Vojkan J. and Kozić, Mirko S. and Rašuo, Boško and Jegdić, Bore",
year = "2018",
abstract = "Methods of diagnosing aerodynamic characteristics are constantly developing in order to conduct the precise and energy efficient wind tunnel testing of transport vehicles in the prototype design early stages. This is of a special importance when facing the time/cost consumption problems of detection of the transition zone over the simplified design of the high-speed train. Herein the applied thermodynamics found a very significant role in the field of experimental aerodynamics. With the intention of detecting the boundary-layer transition zone the following measurements were applied: the infrared thermography, flow visualization, and drag force measurements. In addition, the CFD was applied to predict the flow behaviour and transition zone, solving PDE consisting of the Reynolds-averaged Navier-Stokes equations, energy equation, and the equation of state for an ideal gas employing density-based solver. The thermal imaging defined the transition zone by simple application, and fast recognition, while the transition bounds were defined in the analysis. The flow visualization confirmed thermography results and the method itself as favourable, especially in the most expensive early phases of redesigning for aerodynamically optimized and energy efficient solutions. The numerical method was confirmed by the experiments, resulting in acceptable differences in the definition of the transition zone. For a better understanding of the phenomenon, the overlapped implementation of the presented methods focused on forced convection showed as the best solution. Based on the experiences of this research, development of the additional equipment and adjustments will be introduced in the future experiments.",
publisher = "Belgrade : VINČA Institute of Nuclear Sciences",
journal = "Thermal Science",
title = "Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test",
volume = "22",
number = "2",
pages = "1137-1148",
doi = "10.2298/TSCI170619302L"
}

Linić, S., Ocokoljić, G. J., Ristić, S. S., Lučanin, V. J., Kozić, M. S., Rašuo, B.,& Jegdić, B.. (2018). Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test. in Thermal Science
Belgrade : VINČA Institute of Nuclear Sciences., 22(2), 1137-1148.
https://doi.org/10.2298/TSCI170619302L

Linić S, Ocokoljić GJ, Ristić SS, Lučanin VJ, Kozić MS, Rašuo B, Jegdić B. Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test. in Thermal Science. 2018;22(2):1137-1148.
doi:10.2298/TSCI170619302L .

Linić, Suzana, Ocokoljić, Goran J., Ristić, Slavica S., Lučanin, Vojkan J., Kozić, Mirko S., Rašuo, Boško, Jegdić, Bore, "Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test" in Thermal Science, 22, no. 2 (2018):1137-1148,
https://doi.org/10.2298/TSCI170619302L . .

TY  - JOUR
AU  - Jegdić, Bore
AU  - Radojković, Bojana
AU  - Bobić, Biljana
AU  - Krmar, Marija
AU  - Ristić, Slavica S.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2448
AB  - Corrosion behavior of metalized layers, obtained by Plasma Transferred Arc (PTA) process and by High-Velocity Oxygen Fuel (HVOF) process with the purpose to improve the wear resistance of vital parts of ventilation mill in a thermal power plant, has been tested. The test is performed using three electrochemical techniques, in a solution containing chloride and sulfate ions. It is shown that the steel surface (base metal) dissolves uniformly, without pitting or other forms of local dissolution. Morphology of metalized layers surface indicates that dissolution is non-uniform, but it still can be considered as general corrosion. The corrosion rate of base metal and metalized layer obtained by PTA process is rather low, while the corrosion rate of the metalized layer obtained by HVOF process is much higher. Also, the difference in corrosion potentials between the base metal and the HVOF layer is pretty high but slightly less than maximum allowed difference (prescribed by the standard), to avoid excessive galvanic corrosion. The values of corrosion rate obtained by different electrochemical techniques are in excellent agreement.
PB  - Belgrade : Association of Metallurgical Engineers of Serbia
T2  - Metallurgical and Materials Engineering
T1  - Corrosion resistance of metalized layers on steel parts in ventilation mill
VL  - 24
IS  - 2
SP  - 123
EP  - 132
DO  - 10.30544/340
ER  - 

@article{
author = "Jegdić, Bore and Radojković, Bojana and Bobić, Biljana and Krmar, Marija and Ristić, Slavica S.",
year = "2018",
abstract = "Corrosion behavior of metalized layers, obtained by Plasma Transferred Arc (PTA) process and by High-Velocity Oxygen Fuel (HVOF) process with the purpose to improve the wear resistance of vital parts of ventilation mill in a thermal power plant, has been tested. The test is performed using three electrochemical techniques, in a solution containing chloride and sulfate ions. It is shown that the steel surface (base metal) dissolves uniformly, without pitting or other forms of local dissolution. Morphology of metalized layers surface indicates that dissolution is non-uniform, but it still can be considered as general corrosion. The corrosion rate of base metal and metalized layer obtained by PTA process is rather low, while the corrosion rate of the metalized layer obtained by HVOF process is much higher. Also, the difference in corrosion potentials between the base metal and the HVOF layer is pretty high but slightly less than maximum allowed difference (prescribed by the standard), to avoid excessive galvanic corrosion. The values of corrosion rate obtained by different electrochemical techniques are in excellent agreement.",
publisher = "Belgrade : Association of Metallurgical Engineers of Serbia",
journal = "Metallurgical and Materials Engineering",
title = "Corrosion resistance of metalized layers on steel parts in ventilation mill",
volume = "24",
number = "2",
pages = "123-132",
doi = "10.30544/340"
}

Jegdić, B., Radojković, B., Bobić, B., Krmar, M.,& Ristić, S. S.. (2018). Corrosion resistance of metalized layers on steel parts in ventilation mill. in Metallurgical and Materials Engineering
Belgrade : Association of Metallurgical Engineers of Serbia., 24(2), 123-132.
https://doi.org/10.30544/340

Jegdić B, Radojković B, Bobić B, Krmar M, Ristić SS. Corrosion resistance of metalized layers on steel parts in ventilation mill. in Metallurgical and Materials Engineering. 2018;24(2):123-132.
doi:10.30544/340 .

Jegdić, Bore, Radojković, Bojana, Bobić, Biljana, Krmar, Marija, Ristić, Slavica S., "Corrosion resistance of metalized layers on steel parts in ventilation mill" in Metallurgical and Materials Engineering, 24, no. 2 (2018):123-132,
https://doi.org/10.30544/340 . .

TY  - JOUR
AU  - Radojković, Bojana
AU  - Ristić, Slavica S.
AU  - Polić, Suzana R.
AU  - Jančić-Heinemann, Radmila
AU  - Radovanovic, Danijelka
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2877
AB  - The classic methods of cleaning oldfashioned textile museum objects with metallic threads often do not yield the expected results. The use of laser in the conservation of these objects plays an important role as very efficient and ecologically friendly technique. Conservation and restoration of historical exhibits with metal-textile combinations is becoming ever more complex due to a huge variety of damaging factors. The paper presents the results of the corrosion laser cleaning effects on ethnographic textile with metallic threads from the holdings of the Ethnographic Museum in Belgrade, using Nd:YAG laser. Testing of the cleaning effects was performed by optical and scanning electron microscopy. Chemical analysis of metal threads is made by EDX and XRD analysis. Parameters for successful and safe cleaning of corrosion products on metallic threads were determined.
T2  - Journal of Cultural Heritage
T1  - Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns
VL  - 23
SP  - 128
EP  - 137
DO  - 10.1016/j.culher.2016.07.001
ER  - 

@article{
author = "Radojković, Bojana and Ristić, Slavica S. and Polić, Suzana R. and Jančić-Heinemann, Radmila and Radovanovic, Danijelka",
year = "2017",
abstract = "The classic methods of cleaning oldfashioned textile museum objects with metallic threads often do not yield the expected results. The use of laser in the conservation of these objects plays an important role as very efficient and ecologically friendly technique. Conservation and restoration of historical exhibits with metal-textile combinations is becoming ever more complex due to a huge variety of damaging factors. The paper presents the results of the corrosion laser cleaning effects on ethnographic textile with metallic threads from the holdings of the Ethnographic Museum in Belgrade, using Nd:YAG laser. Testing of the cleaning effects was performed by optical and scanning electron microscopy. Chemical analysis of metal threads is made by EDX and XRD analysis. Parameters for successful and safe cleaning of corrosion products on metallic threads were determined.",
journal = "Journal of Cultural Heritage",
title = "Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns",
volume = "23",
pages = "128-137",
doi = "10.1016/j.culher.2016.07.001"
}

Radojković, B., Ristić, S. S., Polić, S. R., Jančić-Heinemann, R.,& Radovanovic, D.. (2017). Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns. in Journal of Cultural Heritage, 23, 128-137.
https://doi.org/10.1016/j.culher.2016.07.001

Radojković B, Ristić SS, Polić SR, Jančić-Heinemann R, Radovanovic D. Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns. in Journal of Cultural Heritage. 2017;23:128-137.
doi:10.1016/j.culher.2016.07.001 .

Radojković, Bojana, Ristić, Slavica S., Polić, Suzana R., Jančić-Heinemann, Radmila, Radovanovic, Danijelka, "Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns" in Journal of Cultural Heritage, 23 (2017):128-137,
https://doi.org/10.1016/j.culher.2016.07.001 . .

TY  - JOUR
AU  - Radojković, Bojana
AU  - Ristić, Slavica S.
AU  - Polić, Suzana R.
AU  - Jančić-Heinemann, Radmila
AU  - Radovanovic, Danijelka
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2878
AB  - The classic methods of cleaning oldfashioned textile museum objects with metallic threads often do not yield the expected results. The use of laser in the conservation of these objects plays an important role as very efficient and ecologically friendly technique. Conservation and restoration of historical exhibits with metal-textile combinations is becoming ever more complex due to a huge variety of damaging factors. The paper presents the results of the corrosion laser cleaning effects on ethnographic textile with metallic threads from the holdings of the Ethnographic Museum in Belgrade, using Nd:YAG laser. Testing of the cleaning effects was performed by optical and scanning electron microscopy. Chemical analysis of metal threads is made by EDX and XRD analysis. Parameters for successful and safe cleaning of corrosion products on metallic threads were determined.
T2  - Journal of Cultural Heritage
T1  - Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns
VL  - 23
SP  - 128
EP  - 137
DO  - 10.1016/j.culher.2016.07.001
ER  - 

@article{
author = "Radojković, Bojana and Ristić, Slavica S. and Polić, Suzana R. and Jančić-Heinemann, Radmila and Radovanovic, Danijelka",
year = "2017",
abstract = "The classic methods of cleaning oldfashioned textile museum objects with metallic threads often do not yield the expected results. The use of laser in the conservation of these objects plays an important role as very efficient and ecologically friendly technique. Conservation and restoration of historical exhibits with metal-textile combinations is becoming ever more complex due to a huge variety of damaging factors. The paper presents the results of the corrosion laser cleaning effects on ethnographic textile with metallic threads from the holdings of the Ethnographic Museum in Belgrade, using Nd:YAG laser. Testing of the cleaning effects was performed by optical and scanning electron microscopy. Chemical analysis of metal threads is made by EDX and XRD analysis. Parameters for successful and safe cleaning of corrosion products on metallic threads were determined.",
journal = "Journal of Cultural Heritage",
title = "Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns",
volume = "23",
pages = "128-137",
doi = "10.1016/j.culher.2016.07.001"
}

Radojković, B., Ristić, S. S., Polić, S. R., Jančić-Heinemann, R.,& Radovanovic, D.. (2017). Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns. in Journal of Cultural Heritage, 23, 128-137.
https://doi.org/10.1016/j.culher.2016.07.001

Radojković B, Ristić SS, Polić SR, Jančić-Heinemann R, Radovanovic D. Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns. in Journal of Cultural Heritage. 2017;23:128-137.
doi:10.1016/j.culher.2016.07.001 .

Radojković, Bojana, Ristić, Slavica S., Polić, Suzana R., Jančić-Heinemann, Radmila, Radovanovic, Danijelka, "Preliminary investigation on the use of the Q-switched Nd:YAG laser to clean corrosion products on museum embroidered textiles with metallic yarns" in Journal of Cultural Heritage, 23 (2017):128-137,
https://doi.org/10.1016/j.culher.2016.07.001 . .

TY  - JOUR
AU  - Polić, Suzana R.
AU  - Ristić, Slavica S.
AU  - Radojković, Bojana
AU  - Jegdić, Bore
AU  - Janičijević, Milovan M.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2080
AB  - Laser techniques have become irreplaceable in solving a wide variety of conservation problems. For the last thirty years, lasers have been used in the diagnostic process, in the process of removing undesirable layers, as well as in repairing damages of cultural heritage objects. Because of the complexity of artifacts, traditional cleaning methods in many cases have partial success. Laser cleaning shows certain advantages such as: high selectivity, precision, efficiency and reliability in application in different types of materials. There are also certain risks for cleaning objects, and the studies of process optimization are the subject of a number researches. This paper presents the methodology and results of the application of infrared thermography for the continuous monitoring of temperature distribution on the surface of metal objects during laser irradiation. A large number of experiments were performed using Nd: YAG laser for cleaning. The obtained results were verified by the results of the numerical simulation of heat propagation in the base material. It has been shown that infrared thermography can eliminate damage to the base material, which is of special importance in the laser cleaning of priceless value artifact.
AB  - Laserske tehnike su postale nezamenjive u rešavanju najrazličitijih konzervatorskih problema. Zadnjih tridesetak godina koriste se u procesu dijagnostike stanja, u procesu uklanjanja nepoželjnih slojeva, kao i u sanaciji oštećenja na predmetima kulturnog nasleđa. Zbog složenosti artefakata, tradicionalne metode čišćenja, u velikom broju slučajeva, imaju delimičnog uspeha. Lasersko čišćenje pokazuje određene prednosti kao što su: velika selektivnost, preciznost, efikasnost i pouzdanost u primeni kod različitih vrsta materijala. Postoje i određeni rizici po predmete čišćenja, te je optimizacija procesa predmet velikog broja istraživanja. U ovom radu su prikazani metodologija i rezultati primene infracrvene termografije za kontinualni monitoring raspodele temperature na površini metalnih objekta za vreme ozračavanja laserom. Izvršen je veliki broj eksperimenata, u kojima se Nd:YAG laser koristi za čišćenje. Dobijeni rezultati termogarfijom su verifikovani rezultatima numeričke simulacije širenja toplote u osnovnom materijalu. Pokazano je da se primenom infracrvene termografije mogu eliminisati oštećenja na osnovnom materijalu, što je od posebnog značaja kod artefakata neprocenjive vrednosti.
PB  - Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Security optimization of artefacts laser cleaning
T1  - Optimizacija laserskog čišćenja metalnih artifakta
VL  - 72
IS  - 6
SP  - 834
EP  - 841
DO  - 10.5937/tehnika1706834P
ER  - 

@article{
author = "Polić, Suzana R. and Ristić, Slavica S. and Radojković, Bojana and Jegdić, Bore and Janičijević, Milovan M.",
year = "2017",
abstract = "Laser techniques have become irreplaceable in solving a wide variety of conservation problems. For the last thirty years, lasers have been used in the diagnostic process, in the process of removing undesirable layers, as well as in repairing damages of cultural heritage objects. Because of the complexity of artifacts, traditional cleaning methods in many cases have partial success. Laser cleaning shows certain advantages such as: high selectivity, precision, efficiency and reliability in application in different types of materials. There are also certain risks for cleaning objects, and the studies of process optimization are the subject of a number researches. This paper presents the methodology and results of the application of infrared thermography for the continuous monitoring of temperature distribution on the surface of metal objects during laser irradiation. A large number of experiments were performed using Nd: YAG laser for cleaning. The obtained results were verified by the results of the numerical simulation of heat propagation in the base material. It has been shown that infrared thermography can eliminate damage to the base material, which is of special importance in the laser cleaning of priceless value artifact., Laserske tehnike su postale nezamenjive u rešavanju najrazličitijih konzervatorskih problema. Zadnjih tridesetak godina koriste se u procesu dijagnostike stanja, u procesu uklanjanja nepoželjnih slojeva, kao i u sanaciji oštećenja na predmetima kulturnog nasleđa. Zbog složenosti artefakata, tradicionalne metode čišćenja, u velikom broju slučajeva, imaju delimičnog uspeha. Lasersko čišćenje pokazuje određene prednosti kao što su: velika selektivnost, preciznost, efikasnost i pouzdanost u primeni kod različitih vrsta materijala. Postoje i određeni rizici po predmete čišćenja, te je optimizacija procesa predmet velikog broja istraživanja. U ovom radu su prikazani metodologija i rezultati primene infracrvene termografije za kontinualni monitoring raspodele temperature na površini metalnih objekta za vreme ozračavanja laserom. Izvršen je veliki broj eksperimenata, u kojima se Nd:YAG laser koristi za čišćenje. Dobijeni rezultati termogarfijom su verifikovani rezultatima numeričke simulacije širenja toplote u osnovnom materijalu. Pokazano je da se primenom infracrvene termografije mogu eliminisati oštećenja na osnovnom materijalu, što je od posebnog značaja kod artefakata neprocenjive vrednosti.",
publisher = "Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Security optimization of artefacts laser cleaning, Optimizacija laserskog čišćenja metalnih artifakta",
volume = "72",
number = "6",
pages = "834-841",
doi = "10.5937/tehnika1706834P"
}

Polić, S. R., Ristić, S. S., Radojković, B., Jegdić, B.,& Janičijević, M. M.. (2017). Security optimization of artefacts laser cleaning. in Tehnika
Savez inženjera i tehničara Srbije., 72(6), 834-841.
https://doi.org/10.5937/tehnika1706834P

Polić SR, Ristić SS, Radojković B, Jegdić B, Janičijević MM. Security optimization of artefacts laser cleaning. in Tehnika. 2017;72(6):834-841.
doi:10.5937/tehnika1706834P .

Polić, Suzana R., Ristić, Slavica S., Radojković, Bojana, Jegdić, Bore, Janičijević, Milovan M., "Security optimization of artefacts laser cleaning" in Tehnika, 72, no. 6 (2017):834-841,
https://doi.org/10.5937/tehnika1706834P . .

TY  - JOUR
AU  - Kozić, M.
AU  - Ristić, Slavica S.
AU  - Katavic, B.
AU  - Jegdić, Bore
AU  - Prvulović, M.
AU  - Prokolab, M.
AU  - Linić, Suzana
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2216
AB  - Numerical simulation of 3D multiphase flow is performed to determine the velocity field in the fan mill. The mixture model of the Euler-Euler approach is used. Recirculating gas is a primary phase that carries granular phases including the coal powder and sand. The latter causes heavy wear of mill impact plates. The optimal form of hardfacing geometry and technology has an impact both on velocity magnitude and direction of flow in such a way as to reduce plate wear. This paper presents results of surface modification (based on numerical simulation), implemented on impact plates of the fan mill in the Kostolac B power plant in Serbia. Fishbone hardfacing is made in order to increase the lifetime of impact plates and extend the period between overhauls of fan mills. The experimental tests of fishbone surfacing plates, in exploitation conditions, show that the applied modification, hardfacing technologies and coating materials, give expected results. The application of this hardfacing in the form of a fishbone is simpler, faster and more economical compared to complete overlaying and honeycomb impact plate surfacing. The relative weight loss of base plate after an 1440-hour period of exploitation is 8%, while the weight losses for the hard-faced plate is below 7%.
PB  - Society for Structural Integrity and Life, Institute for Material Testing
T2  - Structural Integrity and Life
T1  - Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation
VL  - 17
IS  - 3
SP  - 221
EP  - 228
UR  - https://hdl.handle.net/21.15107/rcub_cer_2216
ER  - 

@article{
author = "Kozić, M. and Ristić, Slavica S. and Katavic, B. and Jegdić, Bore and Prvulović, M. and Prokolab, M. and Linić, Suzana",
year = "2017",
abstract = "Numerical simulation of 3D multiphase flow is performed to determine the velocity field in the fan mill. The mixture model of the Euler-Euler approach is used. Recirculating gas is a primary phase that carries granular phases including the coal powder and sand. The latter causes heavy wear of mill impact plates. The optimal form of hardfacing geometry and technology has an impact both on velocity magnitude and direction of flow in such a way as to reduce plate wear. This paper presents results of surface modification (based on numerical simulation), implemented on impact plates of the fan mill in the Kostolac B power plant in Serbia. Fishbone hardfacing is made in order to increase the lifetime of impact plates and extend the period between overhauls of fan mills. The experimental tests of fishbone surfacing plates, in exploitation conditions, show that the applied modification, hardfacing technologies and coating materials, give expected results. The application of this hardfacing in the form of a fishbone is simpler, faster and more economical compared to complete overlaying and honeycomb impact plate surfacing. The relative weight loss of base plate after an 1440-hour period of exploitation is 8%, while the weight losses for the hard-faced plate is below 7%.",
publisher = "Society for Structural Integrity and Life, Institute for Material Testing",
journal = "Structural Integrity and Life",
title = "Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation",
volume = "17",
number = "3",
pages = "221-228",
url = "https://hdl.handle.net/21.15107/rcub_cer_2216"
}

Kozić, M., Ristić, S. S., Katavic, B., Jegdić, B., Prvulović, M., Prokolab, M.,& Linić, S.. (2017). Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation. in Structural Integrity and Life
Society for Structural Integrity and Life, Institute for Material Testing., 17(3), 221-228.
https://hdl.handle.net/21.15107/rcub_cer_2216

Kozić M, Ristić SS, Katavic B, Jegdić B, Prvulović M, Prokolab M, Linić S. Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation. in Structural Integrity and Life. 2017;17(3):221-228.
https://hdl.handle.net/21.15107/rcub_cer_2216 .

Kozić, M., Ristić, Slavica S., Katavic, B., Jegdić, Bore, Prvulović, M., Prokolab, M., Linić, Suzana, "Wear resistance improvement of thermal plant fan mill impact plates based on numerical flow simulation" in Structural Integrity and Life, 17, no. 3 (2017):221-228,
https://hdl.handle.net/21.15107/rcub_cer_2216 .

TY  - JOUR
AU  - Vitorović-Todorović, Maja D.
AU  - Erić-Nikolić, Aleksandra
AU  - Kolundžija, Branka
AU  - Hamel, Ernest
AU  - Ristić, Slavica S.
AU  - Juranić, Ivan
AU  - Drakulić, Branko
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2873
AB  - Antiproliferative activity of twenty-nine (E)-4-aryl-4-oxo-2-butenoic acid amides against three human
tumor cell lines (HeLa, FemX, and K562) is reported. Compounds showed antiproliferative activity in
one-digit micromolar to submicromolar concentrations. The most active derivatives toward all the cell
lines tested bear alkyl substituents on the aroyl moiety of the molecules. Fourteen compounds showed
tubulin assembly inhibition at concentrations <20 mM. The most potent inhibitor of tubulin assembly
was unsubstituted compound 1, with IC50 ¼ 2.9 mM. Compound 23 had an oral LD50 in vivo of 45 mg/kg in
mice. Cell cycle analysis on K562 cells showed that compounds 1, 2 and 23 caused accumulation of cells
in the G2/M phase, but inhibition of microtubule polymerization is not the principal mode of action of
the compounds. Nevertheless, they may be useful leads for the design of a new class of antitubulin
agents.
PB  - Elsevier Masson SAS.
T2  - European Journal of Medicinal Chemistry
T1  - (E)-4-Aryl-4-oxo-2-butenoic acid amides, chalconeearoylacrylic acid chimeras: Design, antiproliferative activity and inhibition of tubulin polymerization
VL  - 62
SP  - 40
EP  - 50
DO  - 10.1016/j.ejmech.2013.01.006
ER  - 

@article{
author = "Vitorović-Todorović, Maja D. and Erić-Nikolić, Aleksandra and Kolundžija, Branka and Hamel, Ernest and Ristić, Slavica S. and Juranić, Ivan and Drakulić, Branko",
year = "2013",
abstract = "Antiproliferative activity of twenty-nine (E)-4-aryl-4-oxo-2-butenoic acid amides against three human
tumor cell lines (HeLa, FemX, and K562) is reported. Compounds showed antiproliferative activity in
one-digit micromolar to submicromolar concentrations. The most active derivatives toward all the cell
lines tested bear alkyl substituents on the aroyl moiety of the molecules. Fourteen compounds showed
tubulin assembly inhibition at concentrations <20 mM. The most potent inhibitor of tubulin assembly
was unsubstituted compound 1, with IC50 ¼ 2.9 mM. Compound 23 had an oral LD50 in vivo of 45 mg/kg in
mice. Cell cycle analysis on K562 cells showed that compounds 1, 2 and 23 caused accumulation of cells
in the G2/M phase, but inhibition of microtubule polymerization is not the principal mode of action of
the compounds. Nevertheless, they may be useful leads for the design of a new class of antitubulin
agents.",
publisher = "Elsevier Masson SAS.",
journal = "European Journal of Medicinal Chemistry",
title = "(E)-4-Aryl-4-oxo-2-butenoic acid amides, chalconeearoylacrylic acid chimeras: Design, antiproliferative activity and inhibition of tubulin polymerization",
volume = "62",
pages = "40-50",
doi = "10.1016/j.ejmech.2013.01.006"
}

Vitorović-Todorović, M. D., Erić-Nikolić, A., Kolundžija, B., Hamel, E., Ristić, S. S., Juranić, I.,& Drakulić, B.. (2013). (E)-4-Aryl-4-oxo-2-butenoic acid amides, chalconeearoylacrylic acid chimeras: Design, antiproliferative activity and inhibition of tubulin polymerization. in European Journal of Medicinal Chemistry
Elsevier Masson SAS.., 62, 40-50.
https://doi.org/10.1016/j.ejmech.2013.01.006

Vitorović-Todorović MD, Erić-Nikolić A, Kolundžija B, Hamel E, Ristić SS, Juranić I, Drakulić B. (E)-4-Aryl-4-oxo-2-butenoic acid amides, chalconeearoylacrylic acid chimeras: Design, antiproliferative activity and inhibition of tubulin polymerization. in European Journal of Medicinal Chemistry. 2013;62:40-50.
doi:10.1016/j.ejmech.2013.01.006 .

Vitorović-Todorović, Maja D., Erić-Nikolić, Aleksandra, Kolundžija, Branka, Hamel, Ernest, Ristić, Slavica S., Juranić, Ivan, Drakulić, Branko, "(E)-4-Aryl-4-oxo-2-butenoic acid amides, chalconeearoylacrylic acid chimeras: Design, antiproliferative activity and inhibition of tubulin polymerization" in European Journal of Medicinal Chemistry, 62 (2013):40-50,
https://doi.org/10.1016/j.ejmech.2013.01.006 . .

TY  - JOUR
AU  - Dekanski, Dragana
AU  - Ristić, Slavica S.
AU  - Radonjic, Nevena V.
AU  - Petronijevic, Natasa D.
AU  - Dekanski, Aleksandar
AU  - Mitrovic, Dusan M.
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/845
AB  - Recently, the beneficial effects of different single doses of standardized dry olive (Olea europaea L.) leaf extract (OLE) in cold restraint stress (CRS)-induced gastric lesions in rats and its influence on oxidative parameters in gastric mucosa were demonstrated. The present study was undertaken to investigate the long-term pretreatment efficacy of OLE and its potential in the modulation of CRS- induced oxidative changes at the liver level. The experimental animals were divided into four groups, i.e., control, OLE-treated, CRS non-treated and CRS treated with OLE (CRS+OLE) groups. CRS caused severe gastric lesions in all non-pretreated animals and two-week pretreatment with OLE (80 mg per kg of body weight) attenuated stress-induced gastric lesions significantly. The malondialdehyde (MDA) level as an index of lipid peroxidation, superoxide dismutase (SOD) and catalase (CAT) activities were measured spectrophotometrically in liver tissue homogenates. The MDA level was increased in the CRS group and significantly decreased in the CRS+OLE group. The SOD and CAT activities were significantly decreased in the CRS group. In the CRS+OLE group, the activities of these two enzymes were significantly increased in comparison with the CRS group. The results obtained indicate that long-term supplementation with OLE provides oxidant/antioxidant balance in liver during stress condition.
AB  - Nedavno su pokazani povoljni efekti različitih pojedinačnih doza standardizovanog ekstrakta lista masline (Olea europaea L.) na želudačne lezije pacova indukovane imobilizacionim stresom ubrzanim hladnoćom (CRS) i njegov uticaj na parametre oksidativnog stresa u želudačnoj sluznici. U ovoj studiji ispitivan je efekat dugotrajnog pretretmana listom masline i njegov potencijal u modulaciji CRS-om indukovanih oksidativnih promena na nivou jetre. Eksperimentalne životinje su podeljene u četiri grupe: kontrolna, tretirana ekstraktom lista masline (OLE), CRS i grupa kod koje je CRS tretiran ekstraktom (CRS+OLE). CRS je prouzrokovao ozbiljna oštećenja želuca kod svih nepretretiranih životinja, a dvonedeljni pretretman sa OLE (80 mg kg-1 t.t.) značajno je smanjio stresom indukovane želudačne lezije. Malondialdehid (MDA), kao pokazatelj lipidne peroksidacije, aktivnosti superoksid-dismutaze (SOD) i katalaze (CAT) mereni su spektrofotometrijski u homogenatima tkiva jetre. Nivo MDA se značajno povećao u CRS grupi, a potom značajno smanjio u CRS+OLE grupi. Aktivnosti SOD i CAT bile su značajno smanjene u CRS grupi, dok je u CRS+OLE grupi životinja aktivnost ova dva enzima znatno povećana u poređenju sa CRS grupom. Dobijeni rezultati ukazuju na to da dugotrajno prehranjivanje ekstraktom lista masline pomaže uspostavljanje oksidativne-antioksidativne ravnoteže u jetri tokom stresa.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Olive leaf extract modulates cold restraint stress-induced oxidative changes in rat liver
T1  - Ekstrakt lista masline moduliše oksidativne promene indukovane imobilizacionim stresom ubrzanim hladnoćom u jetri pacova
VL  - 76
IS  - 9
SP  - 1207
EP  - 1218
DO  - 10.2298/JSC110204107D
ER  - 

@article{
author = "Dekanski, Dragana and Ristić, Slavica S. and Radonjic, Nevena V. and Petronijevic, Natasa D. and Dekanski, Aleksandar and Mitrovic, Dusan M.",
year = "2011",
abstract = "Recently, the beneficial effects of different single doses of standardized dry olive (Olea europaea L.) leaf extract (OLE) in cold restraint stress (CRS)-induced gastric lesions in rats and its influence on oxidative parameters in gastric mucosa were demonstrated. The present study was undertaken to investigate the long-term pretreatment efficacy of OLE and its potential in the modulation of CRS- induced oxidative changes at the liver level. The experimental animals were divided into four groups, i.e., control, OLE-treated, CRS non-treated and CRS treated with OLE (CRS+OLE) groups. CRS caused severe gastric lesions in all non-pretreated animals and two-week pretreatment with OLE (80 mg per kg of body weight) attenuated stress-induced gastric lesions significantly. The malondialdehyde (MDA) level as an index of lipid peroxidation, superoxide dismutase (SOD) and catalase (CAT) activities were measured spectrophotometrically in liver tissue homogenates. The MDA level was increased in the CRS group and significantly decreased in the CRS+OLE group. The SOD and CAT activities were significantly decreased in the CRS group. In the CRS+OLE group, the activities of these two enzymes were significantly increased in comparison with the CRS group. The results obtained indicate that long-term supplementation with OLE provides oxidant/antioxidant balance in liver during stress condition., Nedavno su pokazani povoljni efekti različitih pojedinačnih doza standardizovanog ekstrakta lista masline (Olea europaea L.) na želudačne lezije pacova indukovane imobilizacionim stresom ubrzanim hladnoćom (CRS) i njegov uticaj na parametre oksidativnog stresa u želudačnoj sluznici. U ovoj studiji ispitivan je efekat dugotrajnog pretretmana listom masline i njegov potencijal u modulaciji CRS-om indukovanih oksidativnih promena na nivou jetre. Eksperimentalne životinje su podeljene u četiri grupe: kontrolna, tretirana ekstraktom lista masline (OLE), CRS i grupa kod koje je CRS tretiran ekstraktom (CRS+OLE). CRS je prouzrokovao ozbiljna oštećenja želuca kod svih nepretretiranih životinja, a dvonedeljni pretretman sa OLE (80 mg kg-1 t.t.) značajno je smanjio stresom indukovane želudačne lezije. Malondialdehid (MDA), kao pokazatelj lipidne peroksidacije, aktivnosti superoksid-dismutaze (SOD) i katalaze (CAT) mereni su spektrofotometrijski u homogenatima tkiva jetre. Nivo MDA se značajno povećao u CRS grupi, a potom značajno smanjio u CRS+OLE grupi. Aktivnosti SOD i CAT bile su značajno smanjene u CRS grupi, dok je u CRS+OLE grupi životinja aktivnost ova dva enzima znatno povećana u poređenju sa CRS grupom. Dobijeni rezultati ukazuju na to da dugotrajno prehranjivanje ekstraktom lista masline pomaže uspostavljanje oksidativne-antioksidativne ravnoteže u jetri tokom stresa.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Olive leaf extract modulates cold restraint stress-induced oxidative changes in rat liver, Ekstrakt lista masline moduliše oksidativne promene indukovane imobilizacionim stresom ubrzanim hladnoćom u jetri pacova",
volume = "76",
number = "9",
pages = "1207-1218",
doi = "10.2298/JSC110204107D"
}

Dekanski, D., Ristić, S. S., Radonjic, N. V., Petronijevic, N. D., Dekanski, A.,& Mitrovic, D. M.. (2011). Olive leaf extract modulates cold restraint stress-induced oxidative changes in rat liver. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 76(9), 1207-1218.
https://doi.org/10.2298/JSC110204107D

Dekanski D, Ristić SS, Radonjic NV, Petronijevic ND, Dekanski A, Mitrovic DM. Olive leaf extract modulates cold restraint stress-induced oxidative changes in rat liver. in Journal of the Serbian Chemical Society. 2011;76(9):1207-1218.
doi:10.2298/JSC110204107D .

Dekanski, Dragana, Ristić, Slavica S., Radonjic, Nevena V., Petronijevic, Natasa D., Dekanski, Aleksandar, Mitrovic, Dusan M., "Olive leaf extract modulates cold restraint stress-induced oxidative changes in rat liver" in Journal of the Serbian Chemical Society, 76, no. 9 (2011):1207-1218,
https://doi.org/10.2298/JSC110204107D . .