TY  - JOUR
AU  - Atanasoski, Vladimir
AU  - Petrović, Jovana
AU  - Popović Maneski, Lana
AU  - Miletić, Marjan
AU  - Babić, Miloš
AU  - Nikolić, Aleksandra
AU  - Panescu, Dorin
AU  - Ivanović, Marija D.
PY  - 2024
UR  - https://dais.sanu.ac.rs/123456789/16515
AB  - Goal: Clinical interpretation of an electrocardiogram (ECG) can be detrimentally affected by noise. Removal of the electromyographic (EMG) noise is particularly challenging due to its spectral overlap with the QRS complex. The existing EMG-denoising algorithms often distort signal morphology, thus obscuring diagnostically relevant information. Methods: Here, a new iterative regeneration method (IRM) for efficient EMG-noise suppression is proposed. The main hypothesis is that the temporary removal of the dominant ECG components enables extraction of the noise with the minimum alteration to the signal. The method is validated on SimEMG database of simultaneously recorded reference and noisy signals, MIT-BIH arrhythmia database and synthesized ECG signals, both with the noise from MIT Noise Stress Test Database. Results: IRM denoising and morphology-preserving performance is superior to the wavelet- and FIR-based benchmark methods. Conclusions : IRM is reliable, computationally non-intensive, fast and applicable to any number of ECG channels recorded by mobile or standard ECG devices.
PB  - Institute of Electrical and Electronics Engineers (IEEE)
T2  - IEEE Open Journal of Engineering in Medicine and Biology
T1  - A morphology-preserving algorithm for denoising of EMG-contaminated ECG signals
SP  - 1
EP  - 10
DO  - 10.1109/OJEMB.2024.3380352
UR  - https://hdl.handle.net/21.15107/rcub_dais_16515
ER  - 

@article{
author = "Atanasoski, Vladimir and Petrović, Jovana and Popović Maneski, Lana and Miletić, Marjan and Babić, Miloš and Nikolić, Aleksandra and Panescu, Dorin and Ivanović, Marija D.",
year = "2024",
abstract = "Goal: Clinical interpretation of an electrocardiogram (ECG) can be detrimentally affected by noise. Removal of the electromyographic (EMG) noise is particularly challenging due to its spectral overlap with the QRS complex. The existing EMG-denoising algorithms often distort signal morphology, thus obscuring diagnostically relevant information. Methods: Here, a new iterative regeneration method (IRM) for efficient EMG-noise suppression is proposed. The main hypothesis is that the temporary removal of the dominant ECG components enables extraction of the noise with the minimum alteration to the signal. The method is validated on SimEMG database of simultaneously recorded reference and noisy signals, MIT-BIH arrhythmia database and synthesized ECG signals, both with the noise from MIT Noise Stress Test Database. Results: IRM denoising and morphology-preserving performance is superior to the wavelet- and FIR-based benchmark methods. Conclusions : IRM is reliable, computationally non-intensive, fast and applicable to any number of ECG channels recorded by mobile or standard ECG devices.",
publisher = "Institute of Electrical and Electronics Engineers (IEEE)",
journal = "IEEE Open Journal of Engineering in Medicine and Biology",
title = "A morphology-preserving algorithm for denoising of EMG-contaminated ECG signals",
pages = "1-10",
doi = "10.1109/OJEMB.2024.3380352",
url = "https://hdl.handle.net/21.15107/rcub_dais_16515"
}

Atanasoski, V., Petrović, J., Popović Maneski, L., Miletić, M., Babić, M., Nikolić, A., Panescu, D.,& Ivanović, M. D.. (2024). A morphology-preserving algorithm for denoising of EMG-contaminated ECG signals. in IEEE Open Journal of Engineering in Medicine and Biology
Institute of Electrical and Electronics Engineers (IEEE)., 1-10.
https://doi.org/10.1109/OJEMB.2024.3380352
https://hdl.handle.net/21.15107/rcub_dais_16515

Atanasoski V, Petrović J, Popović Maneski L, Miletić M, Babić M, Nikolić A, Panescu D, Ivanović MD. A morphology-preserving algorithm for denoising of EMG-contaminated ECG signals. in IEEE Open Journal of Engineering in Medicine and Biology. 2024;:1-10.
doi:10.1109/OJEMB.2024.3380352
https://hdl.handle.net/21.15107/rcub_dais_16515 .

Atanasoski, Vladimir, Petrović, Jovana, Popović Maneski, Lana, Miletić, Marjan, Babić, Miloš, Nikolić, Aleksandra, Panescu, Dorin, Ivanović, Marija D., "A morphology-preserving algorithm for denoising of EMG-contaminated ECG signals" in IEEE Open Journal of Engineering in Medicine and Biology (2024):1-10,
https://doi.org/10.1109/OJEMB.2024.3380352 .,
https://hdl.handle.net/21.15107/rcub_dais_16515 .

TY  - JOUR
AU  - Atanasoski, Vladimir
AU  - Petrovic, Jovana
AU  - Popović Maneski, Lana
AU  - Miletić, Marjan
AU  - Babić, Miloš
AU  - Nikolić, Aleksandra
AU  - Panescu, Dorin
AU  - Ivanović, Marija D.
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/15362
AB  - Goal: Noise on recorded electrocardiographic (ECG) signals may affect their clinical interpretation. Electromyographic (EMG) noise spectrally coincides with the QRS complex, which makes its removal particularly challenging. The problem of evaluating the noise-removal techniques has commonly been approached by algorithm testing on the contaminated ECG signals constructed ad hoc as an additive mixture of a noise-free ECG signal and noise. Consequently, there is an absence of a unique/standard database for testing and comparing different denoising methods. We present a SimEMG database recorded by a novel acquisition method that allows for direct recording of the genuine EMG-noise-free and -contaminated ECG signals. The database is available as open source.
PB  - Institute of Electrical and Electronics Engineers (IEEE)
T2  - IEEE Open Journal of Engineering in Medicine and Biology
T1  - A database of simultaneously recorded ECG signals with and without EMG noise
SP  - 222
EP  - 4
VL  - 225
DO  - 10.1109/OJEMB.2023.3330295
UR  - https://hdl.handle.net/21.15107/rcub_dais_15362
ER  - 

@article{
author = "Atanasoski, Vladimir and Petrovic, Jovana and Popović Maneski, Lana and Miletić, Marjan and Babić, Miloš and Nikolić, Aleksandra and Panescu, Dorin and Ivanović, Marija D.",
year = "2023",
abstract = "Goal: Noise on recorded electrocardiographic (ECG) signals may affect their clinical interpretation. Electromyographic (EMG) noise spectrally coincides with the QRS complex, which makes its removal particularly challenging. The problem of evaluating the noise-removal techniques has commonly been approached by algorithm testing on the contaminated ECG signals constructed ad hoc as an additive mixture of a noise-free ECG signal and noise. Consequently, there is an absence of a unique/standard database for testing and comparing different denoising methods. We present a SimEMG database recorded by a novel acquisition method that allows for direct recording of the genuine EMG-noise-free and -contaminated ECG signals. The database is available as open source.",
publisher = "Institute of Electrical and Electronics Engineers (IEEE)",
journal = "IEEE Open Journal of Engineering in Medicine and Biology",
title = "A database of simultaneously recorded ECG signals with and without EMG noise",
pages = "222-4",
volume = "225",
doi = "10.1109/OJEMB.2023.3330295",
url = "https://hdl.handle.net/21.15107/rcub_dais_15362"
}

Atanasoski, V., Petrovic, J., Popović Maneski, L., Miletić, M., Babić, M., Nikolić, A., Panescu, D.,& Ivanović, M. D.. (2023). A database of simultaneously recorded ECG signals with and without EMG noise. in IEEE Open Journal of Engineering in Medicine and Biology
Institute of Electrical and Electronics Engineers (IEEE)., 225, 222-4.
https://doi.org/10.1109/OJEMB.2023.3330295
https://hdl.handle.net/21.15107/rcub_dais_15362

Atanasoski V, Petrovic J, Popović Maneski L, Miletić M, Babić M, Nikolić A, Panescu D, Ivanović MD. A database of simultaneously recorded ECG signals with and without EMG noise. in IEEE Open Journal of Engineering in Medicine and Biology. 2023;225:222-4.
doi:10.1109/OJEMB.2023.3330295
https://hdl.handle.net/21.15107/rcub_dais_15362 .

Atanasoski, Vladimir, Petrovic, Jovana, Popović Maneski, Lana, Miletić, Marjan, Babić, Miloš, Nikolić, Aleksandra, Panescu, Dorin, Ivanović, Marija D., "A database of simultaneously recorded ECG signals with and without EMG noise" in IEEE Open Journal of Engineering in Medicine and Biology, 225 (2023):222-4,
https://doi.org/10.1109/OJEMB.2023.3330295 .,
https://hdl.handle.net/21.15107/rcub_dais_15362 .

TY  - JOUR
AU  - Ivanović, Marija
AU  - Nenadović, Snežana
AU  - Pavlović, Vera P.
AU  - Radović, Ivona
AU  - Kijevčanin, Mirjana
AU  - Pavlović, Vladimir B.
AU  - Kljajević, Ljiljana
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11800
AB  - Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.
PB  - Society of Chemists and Technologists of Macedonia
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers
SP  - 99
VL  - 40
IS  - 1
DO  - 10.20450/mjcce.2021.2127
UR  - https://hdl.handle.net/21.15107/rcub_dais_11800
ER  - 

@article{
author = "Ivanović, Marija and Nenadović, Snežana and Pavlović, Vera P. and Radović, Ivona and Kijevčanin, Mirjana and Pavlović, Vladimir B. and Kljajević, Ljiljana",
year = "2021",
abstract = "Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers",
pages = "99",
volume = "40",
number = "1",
doi = "10.20450/mjcce.2021.2127",
url = "https://hdl.handle.net/21.15107/rcub_dais_11800"
}

Ivanović, M., Nenadović, S., Pavlović, V. P., Radović, I., Kijevčanin, M., Pavlović, V. B.,& Kljajević, L.. (2021). The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering
Society of Chemists and Technologists of Macedonia., 40(1), 99.
https://doi.org/10.20450/mjcce.2021.2127
https://hdl.handle.net/21.15107/rcub_dais_11800

Ivanović M, Nenadović S, Pavlović VP, Radović I, Kijevčanin M, Pavlović VB, Kljajević L. The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering. 2021;40(1):99.
doi:10.20450/mjcce.2021.2127
https://hdl.handle.net/21.15107/rcub_dais_11800 .

Ivanović, Marija, Nenadović, Snežana, Pavlović, Vera P., Radović, Ivona, Kijevčanin, Mirjana, Pavlović, Vladimir B., Kljajević, Ljiljana, "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers" in Macedonian Journal of Chemistry and Chemical Engineering, 40, no. 1 (2021):99,
https://doi.org/10.20450/mjcce.2021.2127 .,
https://hdl.handle.net/21.15107/rcub_dais_11800 .

TY  - JOUR
AU  - Popović Maneski, Lana
AU  - Ivanović, Marija D.
AU  - Atanasoski, Vladimir
AU  - Miletić, Marjan
AU  - Zdolšek, Sanja
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/11598
AB  - Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.
PB  - Walter de Gruyter GmbH
T2  - Biomedical Engineering / Biomedizinische Technik
T1  - Properties of different types of dry electrodes for wearable smart monitoring devices
SP  - 405
EP  - 415
VL  - 65
IS  - 4
DO  - 10.1515/bmt-2019-0167
UR  - https://hdl.handle.net/21.15107/rcub_dais_11598
ER  - 

@article{
author = "Popović Maneski, Lana and Ivanović, Marija D. and Atanasoski, Vladimir and Miletić, Marjan and Zdolšek, Sanja and Bojović, Boško and Hadžievski, Ljupčo",
year = "2020",
abstract = "Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.",
publisher = "Walter de Gruyter GmbH",
journal = "Biomedical Engineering / Biomedizinische Technik",
title = "Properties of different types of dry electrodes for wearable smart monitoring devices",
pages = "405-415",
volume = "65",
number = "4",
doi = "10.1515/bmt-2019-0167",
url = "https://hdl.handle.net/21.15107/rcub_dais_11598"
}

Popović Maneski, L., Ivanović, M. D., Atanasoski, V., Miletić, M., Zdolšek, S., Bojović, B.,& Hadžievski, L.. (2020). Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik
Walter de Gruyter GmbH., 65(4), 405-415.
https://doi.org/10.1515/bmt-2019-0167
https://hdl.handle.net/21.15107/rcub_dais_11598

Popović Maneski L, Ivanović MD, Atanasoski V, Miletić M, Zdolšek S, Bojović B, Hadžievski L. Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik. 2020;65(4):405-415.
doi:10.1515/bmt-2019-0167
https://hdl.handle.net/21.15107/rcub_dais_11598 .

Popović Maneski, Lana, Ivanović, Marija D., Atanasoski, Vladimir, Miletić, Marjan, Zdolšek, Sanja, Bojović, Boško, Hadžievski, Ljupčo, "Properties of different types of dry electrodes for wearable smart monitoring devices" in Biomedical Engineering / Biomedizinische Technik, 65, no. 4 (2020):405-415,
https://doi.org/10.1515/bmt-2019-0167 .,
https://hdl.handle.net/21.15107/rcub_dais_11598 .

TY  - JOUR
AU  - Popović Maneski, Lana
AU  - Ivanović, Marija D.
AU  - Atanasoski, Vladimir
AU  - Miletić, Marjan
AU  - Zdolšek, Sanja
AU  - Bojović, Boško
AU  - Hadžievski, Ljupčo
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/10028
AB  - Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.
PB  - Walter de Gruyter GmbH
T2  - Biomedical Engineering / Biomedizinische Technik
T1  - Properties of different types of dry electrodes for wearable smart monitoring devices
SP  - 405
EP  - 415
VL  - 65
IS  - 4
DO  - 10.1515/bmt-2019-0167
UR  - https://hdl.handle.net/21.15107/rcub_dais_10028
ER  - 

@article{
author = "Popović Maneski, Lana and Ivanović, Marija D. and Atanasoski, Vladimir and Miletić, Marjan and Zdolšek, Sanja and Bojović, Boško and Hadžievski, Ljupčo",
year = "2020",
abstract = "Wearable smart monitors (WSMs) applied for the estimation of electrophysiological signals are of utmost interest for a non-stressed life. WSM which records heart muscle activities could signalize timely a life-threatening event. The heart muscle activities are typically recorded across the heart at the surface of the body; hence, a WSM monitor requires high-quality surface electrodes. The electrodes used in the clinical settings [i.e. silver/silver chloride (Ag/AgCl) with the gel] are not practical for the daily out of clinic usage. A practical WSM requires the application of a dry electrode with stable and reproducible electrical characteristics. We compared the characteristics of six types of dry electrodes and one gelled electrode during short-term recordings sessions (≈30 s) in real-life conditions: Orbital, monolithic polymer plated with Ag/AgCl, and five rectangular shaped 10 × 6 × 2 mm electrodes (Orbital, Ag electrode, Ag/AgCl electrode, gold electrode and stainless-steel AISI304). The results of a well-controlled analysis which considered motion artifacts, line noise and junction potentials suggest that among the dry electrodes Ag/AgCl performs the best. The Ag/AgCl electrode is in average three times better compared with the stainless-steel electrode often used in WSMs.",
publisher = "Walter de Gruyter GmbH",
journal = "Biomedical Engineering / Biomedizinische Technik",
title = "Properties of different types of dry electrodes for wearable smart monitoring devices",
pages = "405-415",
volume = "65",
number = "4",
doi = "10.1515/bmt-2019-0167",
url = "https://hdl.handle.net/21.15107/rcub_dais_10028"
}

Popović Maneski, L., Ivanović, M. D., Atanasoski, V., Miletić, M., Zdolšek, S., Bojović, B.,& Hadžievski, L.. (2020). Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik
Walter de Gruyter GmbH., 65(4), 405-415.
https://doi.org/10.1515/bmt-2019-0167
https://hdl.handle.net/21.15107/rcub_dais_10028

Popović Maneski L, Ivanović MD, Atanasoski V, Miletić M, Zdolšek S, Bojović B, Hadžievski L. Properties of different types of dry electrodes for wearable smart monitoring devices. in Biomedical Engineering / Biomedizinische Technik. 2020;65(4):405-415.
doi:10.1515/bmt-2019-0167
https://hdl.handle.net/21.15107/rcub_dais_10028 .

Popović Maneski, Lana, Ivanović, Marija D., Atanasoski, Vladimir, Miletić, Marjan, Zdolšek, Sanja, Bojović, Boško, Hadžievski, Ljupčo, "Properties of different types of dry electrodes for wearable smart monitoring devices" in Biomedical Engineering / Biomedizinische Technik, 65, no. 4 (2020):405-415,
https://doi.org/10.1515/bmt-2019-0167 .,
https://hdl.handle.net/21.15107/rcub_dais_10028 .

TY  - CONF
AU  - Đukić, Dunja
AU  - Nenadović, Snežana S.
AU  - Kljajević, Ljiljana M.
AU  - Pavlović, Vladimir B.
AU  - Ivanović, Marija D.
AU  - Nenadović, Miloš T.
AU  - Mirković, Miljana M.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6964
AB  - In a field of green chemistry, environmental protection and ecological conservation of the environment there are ways to come up with new and more advanced materials using on the one hand natural, recyceled or waste materials and on the other hand syntethic materials obtained by using green chemistry synthesis procedures. The aim of this paper was to synthesize and characterize Brushite-metakaolin-based geopolymer materials and to examine the possibility of using these materials in the fields of construction, cement industry, as well as in environmental protection as potential adsorbents. Initial materials which were used for geopolymer synthesis was Brushite (CaHPO4·2H2O) which was obtained by solutionprecipitation reaction form acetate solutions and Kaolinite clay from Rudovci deposit (Serbia). The obtained mixture powders were dissolved in a strong alcaline solution with addiction of water glass. Produced geopolymers was cast into mods and preserved for 28 days. The starting materials and the synthesized Brushite-metakaolin-based geopolymer material were examined using XRPD, FTIR SEM-EDS methods. The contact angle measurements were made to test hydrophilic and wettable properties of synthesized material.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia
T1  - Synthesis and characterization of Brushite-metakaolin-based geopolymer materials
SP  - 86
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_dais_6964
ER  - 

@conference{
author = "Đukić, Dunja and Nenadović, Snežana S. and Kljajević, Ljiljana M. and Pavlović, Vladimir B. and Ivanović, Marija D. and Nenadović, Miloš T. and Mirković, Miljana M.",
year = "2019",
abstract = "In a field of green chemistry, environmental protection and ecological conservation of the environment there are ways to come up with new and more advanced materials using on the one hand natural, recyceled or waste materials and on the other hand syntethic materials obtained by using green chemistry synthesis procedures. The aim of this paper was to synthesize and characterize Brushite-metakaolin-based geopolymer materials and to examine the possibility of using these materials in the fields of construction, cement industry, as well as in environmental protection as potential adsorbents. Initial materials which were used for geopolymer synthesis was Brushite (CaHPO4·2H2O) which was obtained by solutionprecipitation reaction form acetate solutions and Kaolinite clay from Rudovci deposit (Serbia). The obtained mixture powders were dissolved in a strong alcaline solution with addiction of water glass. Produced geopolymers was cast into mods and preserved for 28 days. The starting materials and the synthesized Brushite-metakaolin-based geopolymer material were examined using XRPD, FTIR SEM-EDS methods. The contact angle measurements were made to test hydrophilic and wettable properties of synthesized material.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia",
title = "Synthesis and characterization of Brushite-metakaolin-based geopolymer materials",
pages = "86-86",
url = "https://hdl.handle.net/21.15107/rcub_dais_6964"
}

Đukić, D., Nenadović, S. S., Kljajević, L. M., Pavlović, V. B., Ivanović, M. D., Nenadović, M. T.,& Mirković, M. M.. (2019). Synthesis and characterization of Brushite-metakaolin-based geopolymer materials. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 86-86.
https://hdl.handle.net/21.15107/rcub_dais_6964

Đukić D, Nenadović SS, Kljajević LM, Pavlović VB, Ivanović MD, Nenadović MT, Mirković MM. Synthesis and characterization of Brushite-metakaolin-based geopolymer materials. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia. 2019;:86-86.
https://hdl.handle.net/21.15107/rcub_dais_6964 .

Đukić, Dunja, Nenadović, Snežana S., Kljajević, Ljiljana M., Pavlović, Vladimir B., Ivanović, Marija D., Nenadović, Miloš T., Mirković, Miljana M., "Synthesis and characterization of Brushite-metakaolin-based geopolymer materials" in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia (2019):86-86,
https://hdl.handle.net/21.15107/rcub_dais_6964 .

TY  - CONF
AU  - Ivanović, Marija D.
AU  - Đukić, Dunja
AU  - Mladenović, Nataša
AU  - Kljajević, Ljiljana M.
AU  - Pavlović, Vladimir B.
AU  - Nenadović, Snežana S.
AU  - Mirković, Miljana M.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6965
AB  - In order to optimize process of geopolymerization, the investigation of thermodynamic parameters of alkali activators are important. The aim of this research was to investigate the influence of thermodynamic parameters (density, viscosity, refractive index and sound velocity) of alkaline activators on mechanical properties (compressive strength and hardness) of synthesized geopolymer samples. Geopolymers were synthetized by alkaline activation of metakaolin, having the density 2.524 g/cm3, using the activators at elevated temperature of 60 oC for two days. Based on the obtained results thermodynamic properties has been selected to predict the properties of materials. Four series of alkaline activators have been used. Activators remarked as AA1, AA2, AA3 and AA4 present the mixtures of Na2SiO3 and solutions of NaOH, of different molarities 2M, 4M, 6M and 8M respectively. The volume ratio of Na2SiO3 and aqueous solution of NaOH was the same for all samples. Densities, viscosities and refractive indices of alkaline activators were determined over the temperature range 15-60 oC of process of geopolymerizations. The values of density, viscosity and refractive index decrease with temperature increase over the investigated temperature range. Increasing molarity of alkali activator solutions, the sound velocity of activators is changed. For sample AA2 the values of sound velocity rises from room temperature to 45 °C and then begins to decrease while for the sample AA3 sound velocity grows until 30 °C and then starts to decrease with further increasing of temperature. Four series of geopolymer samples GP1 to GP4 were synthesiyed using the constant ratio of solid and liquid phase. FTIR, XRD, SEM-EDS methods were used for physicochemical further characterization of geopolymer samples.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia
T1  - The influence of thermodynamic parameters of the alkaline activator on the mechanical properties of geopolymers
SP  - 87
EP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_dais_6965
ER  - 

@conference{
author = "Ivanović, Marija D. and Đukić, Dunja and Mladenović, Nataša and Kljajević, Ljiljana M. and Pavlović, Vladimir B. and Nenadović, Snežana S. and Mirković, Miljana M.",
year = "2019",
abstract = "In order to optimize process of geopolymerization, the investigation of thermodynamic parameters of alkali activators are important. The aim of this research was to investigate the influence of thermodynamic parameters (density, viscosity, refractive index and sound velocity) of alkaline activators on mechanical properties (compressive strength and hardness) of synthesized geopolymer samples. Geopolymers were synthetized by alkaline activation of metakaolin, having the density 2.524 g/cm3, using the activators at elevated temperature of 60 oC for two days. Based on the obtained results thermodynamic properties has been selected to predict the properties of materials. Four series of alkaline activators have been used. Activators remarked as AA1, AA2, AA3 and AA4 present the mixtures of Na2SiO3 and solutions of NaOH, of different molarities 2M, 4M, 6M and 8M respectively. The volume ratio of Na2SiO3 and aqueous solution of NaOH was the same for all samples. Densities, viscosities and refractive indices of alkaline activators were determined over the temperature range 15-60 oC of process of geopolymerizations. The values of density, viscosity and refractive index decrease with temperature increase over the investigated temperature range. Increasing molarity of alkali activator solutions, the sound velocity of activators is changed. For sample AA2 the values of sound velocity rises from room temperature to 45 °C and then begins to decrease while for the sample AA3 sound velocity grows until 30 °C and then starts to decrease with further increasing of temperature. Four series of geopolymer samples GP1 to GP4 were synthesiyed using the constant ratio of solid and liquid phase. FTIR, XRD, SEM-EDS methods were used for physicochemical further characterization of geopolymer samples.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia",
title = "The influence of thermodynamic parameters of the alkaline activator on the mechanical properties of geopolymers",
pages = "87-87",
url = "https://hdl.handle.net/21.15107/rcub_dais_6965"
}

Ivanović, M. D., Đukić, D., Mladenović, N., Kljajević, L. M., Pavlović, V. B., Nenadović, S. S.,& Mirković, M. M.. (2019). The influence of thermodynamic parameters of the alkaline activator on the mechanical properties of geopolymers. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 87-87.
https://hdl.handle.net/21.15107/rcub_dais_6965

Ivanović MD, Đukić D, Mladenović N, Kljajević LM, Pavlović VB, Nenadović SS, Mirković MM. The influence of thermodynamic parameters of the alkaline activator on the mechanical properties of geopolymers. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia. 2019;:87-87.
https://hdl.handle.net/21.15107/rcub_dais_6965 .

Ivanović, Marija D., Đukić, Dunja, Mladenović, Nataša, Kljajević, Ljiljana M., Pavlović, Vladimir B., Nenadović, Snežana S., Mirković, Miljana M., "The influence of thermodynamic parameters of the alkaline activator on the mechanical properties of geopolymers" in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia (2019):87-87,
https://hdl.handle.net/21.15107/rcub_dais_6965 .

TY  - CONF
AU  - Ivanović, Marija
AU  - Mladenović, Nataša
AU  - Gulicovski, Jelena
AU  - Pavlović, Vladimir B.
AU  - Pavlović, Vera P.
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4116
AB  - Considering geopolymers as inorganic polymers, they are actually amorphous network of interlinked silicate and aluminate groups, so they could be prospective ceramic precursors for materials with defined dimensions obtained by casting and firing, but not from powder processing. In this research, the starting material is metakaolin, which was obtained by calcining domes tic kaolinite clay. Initially, four series of alkaline activators of NaOH and sodium silicate have been used. Activators present the mixtures of Na2SiO3 and solutions of NaOH, of different molarities 2M, 4M, 6M and 8M. The prepared geopolymer slurries were cast into the designated near shape at room temperature and after that at 60oC. In fact, the post-synthesis curing process (28 days) has an important role in the obtaining good characteristics of geopolymers. Densities, viscosities and refractive index of alkaline activators were determined over the temperature range 15-60oC of process of geopolymerizations. Based on the obtained results of investigated parameters have been selected to predict the properties of materials. All geopolymer samples were characterized by XRD, FTIR, SEM/EDS analysis and Raman spectroscopy providing complementary and valuable information of the investigated materials. This route of ceramics production has advantages associated with producing an environmental friendly, energy saving, clean new technology of geopolymer materials.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018
T1  - Effect of Alkaline Activator Properties on Structure of Metakaolin-Based Geopolymer Samples
SP  - 73
EP  - 74
UR  - https://hdl.handle.net/21.15107/rcub_dais_4116
ER  - 

@conference{
author = "Ivanović, Marija and Mladenović, Nataša and Gulicovski, Jelena and Pavlović, Vladimir B. and Pavlović, Vera P. and Kljajević, Ljiljana M. and Nenadović, Snežana S.",
year = "2018",
abstract = "Considering geopolymers as inorganic polymers, they are actually amorphous network of interlinked silicate and aluminate groups, so they could be prospective ceramic precursors for materials with defined dimensions obtained by casting and firing, but not from powder processing. In this research, the starting material is metakaolin, which was obtained by calcining domes tic kaolinite clay. Initially, four series of alkaline activators of NaOH and sodium silicate have been used. Activators present the mixtures of Na2SiO3 and solutions of NaOH, of different molarities 2M, 4M, 6M and 8M. The prepared geopolymer slurries were cast into the designated near shape at room temperature and after that at 60oC. In fact, the post-synthesis curing process (28 days) has an important role in the obtaining good characteristics of geopolymers. Densities, viscosities and refractive index of alkaline activators were determined over the temperature range 15-60oC of process of geopolymerizations. Based on the obtained results of investigated parameters have been selected to predict the properties of materials. All geopolymer samples were characterized by XRD, FTIR, SEM/EDS analysis and Raman spectroscopy providing complementary and valuable information of the investigated materials. This route of ceramics production has advantages associated with producing an environmental friendly, energy saving, clean new technology of geopolymer materials.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018",
title = "Effect of Alkaline Activator Properties on Structure of Metakaolin-Based Geopolymer Samples",
pages = "73-74",
url = "https://hdl.handle.net/21.15107/rcub_dais_4116"
}

Ivanović, M., Mladenović, N., Gulicovski, J., Pavlović, V. B., Pavlović, V. P., Kljajević, L. M.,& Nenadović, S. S.. (2018). Effect of Alkaline Activator Properties on Structure of Metakaolin-Based Geopolymer Samples. in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018
Belgrade : Serbian Ceramic Society., 73-74.
https://hdl.handle.net/21.15107/rcub_dais_4116

Ivanović M, Mladenović N, Gulicovski J, Pavlović VB, Pavlović VP, Kljajević LM, Nenadović SS. Effect of Alkaline Activator Properties on Structure of Metakaolin-Based Geopolymer Samples. in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018. 2018;:73-74.
https://hdl.handle.net/21.15107/rcub_dais_4116 .

Ivanović, Marija, Mladenović, Nataša, Gulicovski, Jelena, Pavlović, Vladimir B., Pavlović, Vera P., Kljajević, Ljiljana M., Nenadović, Snežana S., "Effect of Alkaline Activator Properties on Structure of Metakaolin-Based Geopolymer Samples" in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018 (2018):73-74,
https://hdl.handle.net/21.15107/rcub_dais_4116 .

TY  - CONF
AU  - Ivanović, Marija
AU  - Kljajević, Ljiljana M.
AU  - Gulicovski, Jelena
AU  - Todorović, Bratislav Ž.
AU  - Egelja, Adela
AU  - Pavlović, Vladimir B.
AU  - Nenadović, Snežana S.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3630
AB  - The goal of this research was to produce an environmental friendly, energy saving inorganic polymer using a metakaolin as a precursor. The clean technology which conserve the natural environment was employed for the production of these materials. The used kaolinite is clay obtained from Rudovci, Lazarevac, Serbia. Physicochemical properties of kaolin were investigated in previous work by Nenadović et al. [1]. Metakaolin (MK) was prepared by calcining kaolinite at 750 °C for 1 h. The influence of alkali activation, i.e. different concentration of NaOH as a component of alkali activator mixture on the process of polymerization of metakaolin is investigated. The alkaline solution was prepared from sodium silicate and 2M, 4M, 6M and 8 M NaOH (analytical grade) (volume ratio Na2SiO3/NaOH = 1.6). The inorganic polymer (IP) samples were formed from metakaolin and the four different alkaline solution (solid/liquid ratio was about 1), which were mixed for 15 min and then left at room temperature for one day. Finally, the mixture was kept in a sample drying oven for 2 days at 60 °C. Process of aging time of inorganic polymer samples at 7th, 14th, 21st and 28th days is followed by some analytical methods (XRD, FTIR). X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) were used for characterization of metakaolin and metakaolin based inorganic polymers. After 28th days when the aging time were finished, on the surface of the samples were used scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). XRD analysis almost of all inorganic polymer samples revealed their amorphouslike structure with the position of an amorphous halo in the range 18°-32°, which indicates short range ordering of the reference sample with crystalline admixture of SiO2 (α-quartz, ICSD 89). The FTIR spectra of all samples shows a strong peak at ∼1000 cm−1 which is associated with Si–O–Si asymmetric stretching vibrations and is the finger print of the geopolymerization [2,3]. The FT-IR results show a shift of the Si-O or Si-O-X bands as the molarity of activator increasing during polymerization process, where X can be Si or Al. Both methods and XRD, as well as FTIR, show greater sensitivity to monitoring the effects of molarity, than the aging time within the same molarity to structural changes in inorganic polymer. SEM micrographs (Fig.1) showed a denser matrix, and a lower content of unreacted metakaolin particles due to increasing of molarity of NaOH. Structural reorganization of inorganic polymer samples occurs during the curing or aging in accordance with a polymerization mechanism.
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer
SP  - 204
EP  - 206
UR  - https://hdl.handle.net/21.15107/rcub_dais_3630
ER  - 

@conference{
author = "Ivanović, Marija and Kljajević, Ljiljana M. and Gulicovski, Jelena and Todorović, Bratislav Ž. and Egelja, Adela and Pavlović, Vladimir B. and Nenadović, Snežana S.",
year = "2018",
abstract = "The goal of this research was to produce an environmental friendly, energy saving inorganic polymer using a metakaolin as a precursor. The clean technology which conserve the natural environment was employed for the production of these materials. The used kaolinite is clay obtained from Rudovci, Lazarevac, Serbia. Physicochemical properties of kaolin were investigated in previous work by Nenadović et al. [1]. Metakaolin (MK) was prepared by calcining kaolinite at 750 °C for 1 h. The influence of alkali activation, i.e. different concentration of NaOH as a component of alkali activator mixture on the process of polymerization of metakaolin is investigated. The alkaline solution was prepared from sodium silicate and 2M, 4M, 6M and 8 M NaOH (analytical grade) (volume ratio Na2SiO3/NaOH = 1.6). The inorganic polymer (IP) samples were formed from metakaolin and the four different alkaline solution (solid/liquid ratio was about 1), which were mixed for 15 min and then left at room temperature for one day. Finally, the mixture was kept in a sample drying oven for 2 days at 60 °C. Process of aging time of inorganic polymer samples at 7th, 14th, 21st and 28th days is followed by some analytical methods (XRD, FTIR). X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) were used for characterization of metakaolin and metakaolin based inorganic polymers. After 28th days when the aging time were finished, on the surface of the samples were used scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). XRD analysis almost of all inorganic polymer samples revealed their amorphouslike structure with the position of an amorphous halo in the range 18°-32°, which indicates short range ordering of the reference sample with crystalline admixture of SiO2 (α-quartz, ICSD 89). The FTIR spectra of all samples shows a strong peak at ∼1000 cm−1 which is associated with Si–O–Si asymmetric stretching vibrations and is the finger print of the geopolymerization [2,3]. The FT-IR results show a shift of the Si-O or Si-O-X bands as the molarity of activator increasing during polymerization process, where X can be Si or Al. Both methods and XRD, as well as FTIR, show greater sensitivity to monitoring the effects of molarity, than the aging time within the same molarity to structural changes in inorganic polymer. SEM micrographs (Fig.1) showed a denser matrix, and a lower content of unreacted metakaolin particles due to increasing of molarity of NaOH. Structural reorganization of inorganic polymer samples occurs during the curing or aging in accordance with a polymerization mechanism.",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer",
pages = "204-206",
url = "https://hdl.handle.net/21.15107/rcub_dais_3630"
}

Ivanović, M., Kljajević, L. M., Gulicovski, J., Todorović, B. Ž., Egelja, A., Pavlović, V. B.,& Nenadović, S. S.. (2018). The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 204-206.
https://hdl.handle.net/21.15107/rcub_dais_3630

Ivanović M, Kljajević LM, Gulicovski J, Todorović BŽ, Egelja A, Pavlović VB, Nenadović SS. The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:204-206.
https://hdl.handle.net/21.15107/rcub_dais_3630 .

Ivanović, Marija, Kljajević, Ljiljana M., Gulicovski, Jelena, Todorović, Bratislav Ž., Egelja, Adela, Pavlović, Vladimir B., Nenadović, Snežana S., "The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):204-206,
https://hdl.handle.net/21.15107/rcub_dais_3630 .

TY  - CONF
AU  - Miletić, Marjan
AU  - Ivanović, Marija D.
AU  - Popović Maneski, Lana
AU  - Bojović, Boško
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15422
AB  - Ejection fraction (EF) is the most used parameter for characterisation of Heart Failure (HF) condition. EF is commonly calculated using echocardiography, which is an expensive non–invasive method and not used in primary healthcare. Systolic time intervals (STI) represent a non-invasive and inexpensive method for determination of EF[1, 2]. Heart failure (HF) is the single most expensive diagnosis in medicine. 2–3% of adult population in developed countries have HF diagnosis. It is not detectable by ECG test and it is commonly detected in a late stage, when the process is irreversible [2-5]. In this paper, a multiparametric cardiac measurement system for determination of STI is presented. Measurement system consists of sensors for simultaneous acquisition of electrocardiographic (ECG), phonocardiographic (PCG), photopletysmographic (PPG) and cardiovascular (CV) pulsation signals. CV pulsation signals are measured by long period grating (LPG) fiber-optic sensors[6]. Two non-invasive methods for measuring systolic time intervals (STI) were applied on a set of 6 healthy volunteers, based on ECG, PCG and CV pulsation signals. CV pulsation signals were measured on carotide arthery with PPG and LPG sensors. In the first method, EF was calculated from the obtained STI signals, using CV carotide pulsations measured with the PPG sensor, giving EF values in the range from 0.60 to 0.68, with maximal standard deviation of 0.05. In the second method, EF was obtained using CV carotide pulsations measured with LPG sensor, giving EF values in the range from 0.60 to 0.66, with maximal standard deviation 0.06. Calculated values of EF with both methods were in the 0.55 to 0.75 range which corresponds to normal EF range in healthy individuals.
PB  - Belgrade : Institute of Physics Belgrade
C3  - Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers of the Sixth International School and Conference on Photonics PHOTONICA2017, 28 August – 1 September 2017, Belgrade Serbia
T1  - Application of multiparametric cardiac measurement system in ejection fraction calculation
SP  - 112
EP  - 112
UR  - https://hdl.handle.net/21.15107/rcub_dais_15422
ER  - 

@conference{
author = "Miletić, Marjan and Ivanović, Marija D. and Popović Maneski, Lana and Bojović, Boško",
year = "2017",
abstract = "Ejection fraction (EF) is the most used parameter for characterisation of Heart Failure (HF) condition. EF is commonly calculated using echocardiography, which is an expensive non–invasive method and not used in primary healthcare. Systolic time intervals (STI) represent a non-invasive and inexpensive method for determination of EF[1, 2]. Heart failure (HF) is the single most expensive diagnosis in medicine. 2–3% of adult population in developed countries have HF diagnosis. It is not detectable by ECG test and it is commonly detected in a late stage, when the process is irreversible [2-5]. In this paper, a multiparametric cardiac measurement system for determination of STI is presented. Measurement system consists of sensors for simultaneous acquisition of electrocardiographic (ECG), phonocardiographic (PCG), photopletysmographic (PPG) and cardiovascular (CV) pulsation signals. CV pulsation signals are measured by long period grating (LPG) fiber-optic sensors[6]. Two non-invasive methods for measuring systolic time intervals (STI) were applied on a set of 6 healthy volunteers, based on ECG, PCG and CV pulsation signals. CV pulsation signals were measured on carotide arthery with PPG and LPG sensors. In the first method, EF was calculated from the obtained STI signals, using CV carotide pulsations measured with the PPG sensor, giving EF values in the range from 0.60 to 0.68, with maximal standard deviation of 0.05. In the second method, EF was obtained using CV carotide pulsations measured with LPG sensor, giving EF values in the range from 0.60 to 0.66, with maximal standard deviation 0.06. Calculated values of EF with both methods were in the 0.55 to 0.75 range which corresponds to normal EF range in healthy individuals.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers of the Sixth International School and Conference on Photonics PHOTONICA2017, 28 August – 1 September 2017, Belgrade Serbia",
title = "Application of multiparametric cardiac measurement system in ejection fraction calculation",
pages = "112-112",
url = "https://hdl.handle.net/21.15107/rcub_dais_15422"
}

Miletić, M., Ivanović, M. D., Popović Maneski, L.,& Bojović, B.. (2017). Application of multiparametric cardiac measurement system in ejection fraction calculation. in Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers of the Sixth International School and Conference on Photonics PHOTONICA2017, 28 August – 1 September 2017, Belgrade Serbia
Belgrade : Institute of Physics Belgrade., 112-112.
https://hdl.handle.net/21.15107/rcub_dais_15422

Miletić M, Ivanović MD, Popović Maneski L, Bojović B. Application of multiparametric cardiac measurement system in ejection fraction calculation. in Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers of the Sixth International School and Conference on Photonics PHOTONICA2017, 28 August – 1 September 2017, Belgrade Serbia. 2017;:112-112.
https://hdl.handle.net/21.15107/rcub_dais_15422 .

Miletić, Marjan, Ivanović, Marija D., Popović Maneski, Lana, Bojović, Boško, "Application of multiparametric cardiac measurement system in ejection fraction calculation" in Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers of the Sixth International School and Conference on Photonics PHOTONICA2017, 28 August – 1 September 2017, Belgrade Serbia (2017):112-112,
https://hdl.handle.net/21.15107/rcub_dais_15422 .