TY  - JOUR
AU  - Jovanović-Medojević, Milica
AU  - Dragičević, Aleksandra
AU  - Milanović, Ivana
AU  - Matija, Lidija
AU  - Živković, Slavoljub
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/6682
AB  - Intra-canal fracture of rotary NiTi instruments occurs due to torsional stress, cyclic fatigue, or a combination of these two factors. Broken instruments are a serious obstacle to shaping, cleaning, and filling of the root canal and can adversely affect the outcome of endodontic therapy.
The aim of this study was to examine the magnetic properties and ultrastructural changes of new, used, and fractured NiTi instruments using opto-magnetic imaging spectroscopy (OMIS). The study included three sets of different types of rotary instruments: MTwo (VDW, Munich, Germany), Pro Taper Universal (Dentsply Maillefer, Ballaigues, Switzerland), and BioRace (FKG DENTAIRE Swiss Dental Products, Le Crêt-du-Locle Switzerland). Root canal shaping was performed on root canals with different curvatures, and after intra-canal fracture, instruments of the same type (new, used, and fractured) were analyzed using OMIS at the Faculty of Mechanical Engineering, University of Belgrade.

The obtained results showed a coincidence of peak localization for the used instruments that did not suffer a fracture, as well as for new, unused instruments of all examined groups. Additionally, there was a coincidence of peak intensities for new and fractured instruments in all groups. The specific treatment of electropolishing of the active surface of BioRace instruments caused a completely different electromagnetic response compared to conventional NiTi sets of tested instruments. New, unused BioRace instruments had the most pronounced positive (5.6078 n.a.u. x1000) and negative (−8.5218 n.a.u. x1000) intensity values.
The analysis of NiTi instruments using opto-magnetic imaging spectroscopy indicated changes in the magnetic properties after their instrumentation.
PB  - © 2023 Elsevier Ltd
T2  - Journal of the Mechanical Behavior of Biomedical Materials
T1  - Opto-magnetic imaging spectroscopy in analyzing rotary NiTi endodontic instruments
IS  - May
SP  - 105789
VL  - 141
DO  - 10.1016/j.jmbbm.2023.105789
ER  - 

@article{
author = "Jovanović-Medojević, Milica and Dragičević, Aleksandra and Milanović, Ivana and Matija, Lidija and Živković, Slavoljub",
year = "2023",
abstract = "Intra-canal fracture of rotary NiTi instruments occurs due to torsional stress, cyclic fatigue, or a combination of these two factors. Broken instruments are a serious obstacle to shaping, cleaning, and filling of the root canal and can adversely affect the outcome of endodontic therapy.
The aim of this study was to examine the magnetic properties and ultrastructural changes of new, used, and fractured NiTi instruments using opto-magnetic imaging spectroscopy (OMIS). The study included three sets of different types of rotary instruments: MTwo (VDW, Munich, Germany), Pro Taper Universal (Dentsply Maillefer, Ballaigues, Switzerland), and BioRace (FKG DENTAIRE Swiss Dental Products, Le Crêt-du-Locle Switzerland). Root canal shaping was performed on root canals with different curvatures, and after intra-canal fracture, instruments of the same type (new, used, and fractured) were analyzed using OMIS at the Faculty of Mechanical Engineering, University of Belgrade.

The obtained results showed a coincidence of peak localization for the used instruments that did not suffer a fracture, as well as for new, unused instruments of all examined groups. Additionally, there was a coincidence of peak intensities for new and fractured instruments in all groups. The specific treatment of electropolishing of the active surface of BioRace instruments caused a completely different electromagnetic response compared to conventional NiTi sets of tested instruments. New, unused BioRace instruments had the most pronounced positive (5.6078 n.a.u. x1000) and negative (−8.5218 n.a.u. x1000) intensity values.
The analysis of NiTi instruments using opto-magnetic imaging spectroscopy indicated changes in the magnetic properties after their instrumentation.",
publisher = "© 2023 Elsevier Ltd",
journal = "Journal of the Mechanical Behavior of Biomedical Materials",
title = "Opto-magnetic imaging spectroscopy in analyzing rotary NiTi endodontic instruments",
number = "May",
pages = "105789",
volume = "141",
doi = "10.1016/j.jmbbm.2023.105789"
}

Jovanović-Medojević, M., Dragičević, A., Milanović, I., Matija, L.,& Živković, S.. (2023). Opto-magnetic imaging spectroscopy in analyzing rotary NiTi endodontic instruments. in Journal of the Mechanical Behavior of Biomedical Materials
© 2023 Elsevier Ltd., 141(May), 105789.
https://doi.org/10.1016/j.jmbbm.2023.105789

Jovanović-Medojević M, Dragičević A, Milanović I, Matija L, Živković S. Opto-magnetic imaging spectroscopy in analyzing rotary NiTi endodontic instruments. in Journal of the Mechanical Behavior of Biomedical Materials. 2023;141(May):105789.
doi:10.1016/j.jmbbm.2023.105789 .

Jovanović-Medojević, Milica, Dragičević, Aleksandra, Milanović, Ivana, Matija, Lidija, Živković, Slavoljub, "Opto-magnetic imaging spectroscopy in analyzing rotary NiTi endodontic instruments" in Journal of the Mechanical Behavior of Biomedical Materials, 141, no. May (2023):105789,
https://doi.org/10.1016/j.jmbbm.2023.105789 . .

TY  - JOUR
AU  - Trajkovic, Isaak
AU  - Dragičević, Aleksandra
AU  - Medojevic, Ivana
AU  - Mladenovic, Goran
AU  - Milošević, Miloš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7230
AB  - This paper contains a comparison of the flexural strength results of two different samples. Both samples were made using additive manufacturing, from ABS (acrylonitrile butadiene styrene) material with the inclusion of an unknown filler designated as X. They also have in common that they are divided into two groups, the first group with a material infill of 100 %, and the second group with a material infill of 50 %. In order to determine that the material infill really affects the flexural strength results, the samples are differentiated by their shape. The first sample consists of tiles, while the second sample consists of pipes. The samples are printed vertically, which doesn’t change the material’s inherent mechanical qualities but does change the amount of infill and the strength of the bond between the layers. The difference between the values of the stress at failure of the material in the tile group is approximately 20 %, while in the tube group this difference is approximately 6 %. We can conclude that filling with the material in the range of 50 to 100 % during the production of pipes has an insignificant effect on bending strength, while this is not the case with plate samples. Based on this, there definitely is a significant influence of geometry when determining flexural strength. The idea for further research should be to measure the influence of samples treated with acetone on their flexural strength.
PB  - Springer
T2  - Journal of Mechanical Science and Technology
T1  - The influence of material infill on ABS-X flexural strength
IS  - 37
SP  - 5577/5581
DO  - 10.1007/s12206-023-2310-8
ER  - 

@article{
author = "Trajkovic, Isaak and Dragičević, Aleksandra and Medojevic, Ivana and Mladenovic, Goran and Milošević, Miloš",
year = "2023",
abstract = "This paper contains a comparison of the flexural strength results of two different samples. Both samples were made using additive manufacturing, from ABS (acrylonitrile butadiene styrene) material with the inclusion of an unknown filler designated as X. They also have in common that they are divided into two groups, the first group with a material infill of 100 %, and the second group with a material infill of 50 %. In order to determine that the material infill really affects the flexural strength results, the samples are differentiated by their shape. The first sample consists of tiles, while the second sample consists of pipes. The samples are printed vertically, which doesn’t change the material’s inherent mechanical qualities but does change the amount of infill and the strength of the bond between the layers. The difference between the values of the stress at failure of the material in the tile group is approximately 20 %, while in the tube group this difference is approximately 6 %. We can conclude that filling with the material in the range of 50 to 100 % during the production of pipes has an insignificant effect on bending strength, while this is not the case with plate samples. Based on this, there definitely is a significant influence of geometry when determining flexural strength. The idea for further research should be to measure the influence of samples treated with acetone on their flexural strength.",
publisher = "Springer",
journal = "Journal of Mechanical Science and Technology",
title = "The influence of material infill on ABS-X flexural strength",
number = "37",
pages = "5577/5581",
doi = "10.1007/s12206-023-2310-8"
}

Trajkovic, I., Dragičević, A., Medojevic, I., Mladenovic, G.,& Milošević, M.. (2023). The influence of material infill on ABS-X flexural strength. in Journal of Mechanical Science and Technology
Springer.(37), 5577/5581.
https://doi.org/10.1007/s12206-023-2310-8

Trajkovic I, Dragičević A, Medojevic I, Mladenovic G, Milošević M. The influence of material infill on ABS-X flexural strength. in Journal of Mechanical Science and Technology. 2023;(37):5577/5581.
doi:10.1007/s12206-023-2310-8 .

Trajkovic, Isaak, Dragičević, Aleksandra, Medojevic, Ivana, Mladenovic, Goran, Milošević, Miloš, "The influence of material infill on ABS-X flexural strength" in Journal of Mechanical Science and Technology, no. 37 (2023):5577/5581,
https://doi.org/10.1007/s12206-023-2310-8 . .

TY  - JOUR
AU  - Hut, Igor
AU  - Jeftić, Branislava
AU  - Dragičević, Aleksandra
AU  - Matija, Lidija
AU  - Koruga, Djuro
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7399
AB  - Cervical cancer screening with Papanicolaou test and liquid based cytology relies on the expertise of the pathologist. Liquid based cytology is proven to be more efficient than conventional Papanicolaou test when it comes to sample preparation and possibility of conducting several tests on the same sample. However, specificity and sensitivity of the test are in the range of the Papanicolaou test accuracy metrics, with false negative results still being the main drawback of these manually performed tests. Advances in technology and availability of digital data have enabled succesfull application of machine learning models in diagnostics. Images of cervical cells are now used as input to different deep learning models currently tested in studies concerning computer aided diagnostic systems. This study explores different architectures of convolutional neural network for cervical cancer detection based on Optomagnetic imaging spectroscopy and liquid based cytology samples. The proposed VGG16 based model achieved 93.3% sensitivity and 67.8% specificity in the binary classification problem. Results highlight the need for more balanced dataset in order for suggested deep model to achieve better performance.
PB  - Academy of Sciences and Arts of the Republic of Srpska, Republic of Srpska, B&H
T2  - Contemporary Materials
T1  - COMPUTER AIDED DIAGNOSTIC SYSTEM FOR WHOLE SLIDE IMAGE OF LIQUID BASED CERVICAL CYTOLOGY SAMPLE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK
IS  - 2
VL  - 13
DO  - 10.7251/COMEN2202169H
ER  - 

@article{
author = "Hut, Igor and Jeftić, Branislava and Dragičević, Aleksandra and Matija, Lidija and Koruga, Djuro",
year = "2022",
abstract = "Cervical cancer screening with Papanicolaou test and liquid based cytology relies on the expertise of the pathologist. Liquid based cytology is proven to be more efficient than conventional Papanicolaou test when it comes to sample preparation and possibility of conducting several tests on the same sample. However, specificity and sensitivity of the test are in the range of the Papanicolaou test accuracy metrics, with false negative results still being the main drawback of these manually performed tests. Advances in technology and availability of digital data have enabled succesfull application of machine learning models in diagnostics. Images of cervical cells are now used as input to different deep learning models currently tested in studies concerning computer aided diagnostic systems. This study explores different architectures of convolutional neural network for cervical cancer detection based on Optomagnetic imaging spectroscopy and liquid based cytology samples. The proposed VGG16 based model achieved 93.3% sensitivity and 67.8% specificity in the binary classification problem. Results highlight the need for more balanced dataset in order for suggested deep model to achieve better performance.",
publisher = "Academy of Sciences and Arts of the Republic of Srpska, Republic of Srpska, B&H",
journal = "Contemporary Materials",
title = "COMPUTER AIDED DIAGNOSTIC SYSTEM FOR WHOLE SLIDE IMAGE OF LIQUID BASED CERVICAL CYTOLOGY SAMPLE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK",
number = "2",
volume = "13",
doi = "10.7251/COMEN2202169H"
}

Hut, I., Jeftić, B., Dragičević, A., Matija, L.,& Koruga, D.. (2022). COMPUTER AIDED DIAGNOSTIC SYSTEM FOR WHOLE SLIDE IMAGE OF LIQUID BASED CERVICAL CYTOLOGY SAMPLE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK. in Contemporary Materials
Academy of Sciences and Arts of the Republic of Srpska, Republic of Srpska, B&H., 13(2).
https://doi.org/10.7251/COMEN2202169H

Hut I, Jeftić B, Dragičević A, Matija L, Koruga D. COMPUTER AIDED DIAGNOSTIC SYSTEM FOR WHOLE SLIDE IMAGE OF LIQUID BASED CERVICAL CYTOLOGY SAMPLE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK. in Contemporary Materials. 2022;13(2).
doi:10.7251/COMEN2202169H .

Hut, Igor, Jeftić, Branislava, Dragičević, Aleksandra, Matija, Lidija, Koruga, Djuro, "COMPUTER AIDED DIAGNOSTIC SYSTEM FOR WHOLE SLIDE IMAGE OF LIQUID BASED CERVICAL CYTOLOGY SAMPLE CLASSIFICATION USING CONVOLUTIONAL NEURAL NETWORK" in Contemporary Materials, 13, no. 2 (2022),
https://doi.org/10.7251/COMEN2202169H . .

TY  - CONF
AU  - Obradović, Katarina
AU  - Dragičević, Aleksandra
AU  - Travica, Milan
AU  - Miljković, Suzana
AU  - Mitrović, Nenad
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7699
AB  - Today, cosmetics have become an unavoidable feature of the modern way of life of individuals. The size of the global cosmetics market is estimated at 380.2 billion dollars in 2019 and is projected to reach 463.5 billion dollars by 2027, with a CAGR of 5.3% from 2021 to 2027. According to the client's request, a study of comparing three different cosmetic devices (ProLiftftr, MagicEye, MiniMeso) was conducted at the Centre for Optical Measurements of the Faculty of Mechanical Engineering, University of Belgrade. By using the images obtained with the PeakTech 5620 thermal imaging camera, the effects and quality of the device's effect on the skin were pointed out.
All three devices have cosmetic performance and after a certain number of treatments show improvement in the form of skin tightening, wrinkle reduction, and reduction of swelling around the eyes, but one stands out in terms of application and treatment on the skin. To be specific, the device Proliftfrf has the best properties, which after moving the probe from the place of skin treatment allows faster cooling and a more pleasant treatment without burning and overheating. In addition, it can be seen that the Proliftfrf cosmetic device compared to the other two MiniMeso and MagicEyes has software that is easier to use and allows quick access, and clearly defined items, which increases the speed of work in salons, and allows more customers. This device achieves
better treatment results in a shorter of therapy and thus increases the number of satisfied clients.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2022
T1  - ANALYSIS OF THE INFLUENCE OF THREE DIFFERENT COSMETIC DEVICES ON SKIN SAMPLES USING A THERMOVISION CAMERA
SP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7699
ER  - 

@conference{
author = "Obradović, Katarina and Dragičević, Aleksandra and Travica, Milan and Miljković, Suzana and Mitrović, Nenad",
year = "2022",
abstract = "Today, cosmetics have become an unavoidable feature of the modern way of life of individuals. The size of the global cosmetics market is estimated at 380.2 billion dollars in 2019 and is projected to reach 463.5 billion dollars by 2027, with a CAGR of 5.3% from 2021 to 2027. According to the client's request, a study of comparing three different cosmetic devices (ProLiftftr, MagicEye, MiniMeso) was conducted at the Centre for Optical Measurements of the Faculty of Mechanical Engineering, University of Belgrade. By using the images obtained with the PeakTech 5620 thermal imaging camera, the effects and quality of the device's effect on the skin were pointed out.
All three devices have cosmetic performance and after a certain number of treatments show improvement in the form of skin tightening, wrinkle reduction, and reduction of swelling around the eyes, but one stands out in terms of application and treatment on the skin. To be specific, the device Proliftfrf has the best properties, which after moving the probe from the place of skin treatment allows faster cooling and a more pleasant treatment without burning and overheating. In addition, it can be seen that the Proliftfrf cosmetic device compared to the other two MiniMeso and MagicEyes has software that is easier to use and allows quick access, and clearly defined items, which increases the speed of work in salons, and allows more customers. This device achieves
better treatment results in a shorter of therapy and thus increases the number of satisfied clients.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2022",
title = "ANALYSIS OF THE INFLUENCE OF THREE DIFFERENT COSMETIC DEVICES ON SKIN SAMPLES USING A THERMOVISION CAMERA",
pages = "36",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7699"
}

Obradović, K., Dragičević, A., Travica, M., Miljković, S.,& Mitrović, N.. (2022). ANALYSIS OF THE INFLUENCE OF THREE DIFFERENT COSMETIC DEVICES ON SKIN SAMPLES USING A THERMOVISION CAMERA. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2022
Innovation Center of Faculty of Mechanical Engineering., 36.
https://hdl.handle.net/21.15107/rcub_machinery_7699

Obradović K, Dragičević A, Travica M, Miljković S, Mitrović N. ANALYSIS OF THE INFLUENCE OF THREE DIFFERENT COSMETIC DEVICES ON SKIN SAMPLES USING A THERMOVISION CAMERA. in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2022. 2022;:36.
https://hdl.handle.net/21.15107/rcub_machinery_7699 .

Obradović, Katarina, Dragičević, Aleksandra, Travica, Milan, Miljković, Suzana, Mitrović, Nenad, "ANALYSIS OF THE INFLUENCE OF THREE DIFFERENT COSMETIC DEVICES ON SKIN SAMPLES USING A THERMOVISION CAMERA" in International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH 2022 (2022):36,
https://hdl.handle.net/21.15107/rcub_machinery_7699 .