TY  - JOUR
AU  - Vulić, Ivan
AU  - Borisov, Mirko
AU  - Prodanović, Radomir
AU  - Rančić, Dejan
AU  - Petrović, Vladimir M.
AU  - Stankovski, Stevan
AU  - Ostojić, Gordana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5393
AB  - The quality of DEMs is especially being considered based on the spatial resolution of the created digital models and the type of terrain of the interest area. DEM analysis was performed specifically for LiDAR-based DEMs, as well as a comparison with results obtained using the radar recording method (Shuttle Radar Topography Mission). The application of DEM data for security-sensitive systems requires the fulfillment of security requirements, such as authenticity, integrity, confidentiality, and non-repudiation. For this purpose, the authors have developed a model for non-repudiation and protecting DEM data. The model simulation shows it is possible to detect even the smallest changes made in the transmission or the DEM location, as well as proving the data authenticity and non-repudiation of the sender. DEM data security testing has shown that DEM data is effectively protected from the source of origin to the end entity location.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - Applied Sciences (Switzerland)
T1  - Protection of Digital Elevation Model - One Approach
VL  - 12
IS  - 19
SP  - 9898
DO  - 10.3390/app12199898
ER  - 

@article{
author = "Vulić, Ivan and Borisov, Mirko and Prodanović, Radomir and Rančić, Dejan and Petrović, Vladimir M. and Stankovski, Stevan and Ostojić, Gordana",
year = "2022",
abstract = "The quality of DEMs is especially being considered based on the spatial resolution of the created digital models and the type of terrain of the interest area. DEM analysis was performed specifically for LiDAR-based DEMs, as well as a comparison with results obtained using the radar recording method (Shuttle Radar Topography Mission). The application of DEM data for security-sensitive systems requires the fulfillment of security requirements, such as authenticity, integrity, confidentiality, and non-repudiation. For this purpose, the authors have developed a model for non-repudiation and protecting DEM data. The model simulation shows it is possible to detect even the smallest changes made in the transmission or the DEM location, as well as proving the data authenticity and non-repudiation of the sender. DEM data security testing has shown that DEM data is effectively protected from the source of origin to the end entity location.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "Applied Sciences (Switzerland)",
title = "Protection of Digital Elevation Model - One Approach",
volume = "12",
number = "19",
pages = "9898",
doi = "10.3390/app12199898"
}

Vulić, I., Borisov, M., Prodanović, R., Rančić, D., Petrović, V. M., Stankovski, S.,& Ostojić, G.. (2022). Protection of Digital Elevation Model - One Approach. in Applied Sciences (Switzerland)
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 12(19), 9898.
https://doi.org/10.3390/app12199898

Vulić I, Borisov M, Prodanović R, Rančić D, Petrović VM, Stankovski S, Ostojić G. Protection of Digital Elevation Model - One Approach. in Applied Sciences (Switzerland). 2022;12(19):9898.
doi:10.3390/app12199898 .

Vulić, Ivan, Borisov, Mirko, Prodanović, Radomir, Rančić, Dejan, Petrović, Vladimir M., Stankovski, Stevan, Ostojić, Gordana, "Protection of Digital Elevation Model - One Approach" in Applied Sciences (Switzerland), 12, no. 19 (2022):9898,
https://doi.org/10.3390/app12199898 . .

TY  - CONF
AU  - Milovanović, Biljana
AU  - Oljača, Đurđa
AU  - Pavlović, Stefan
AU  - Ostojić, Gordana
AU  - Obrenović, Zoran
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3796
AB  - Removal of some impurities from Bayer liquor, such as zinc compounds, allows obtaining alumina with low content of impurities incorporated in the crystalline structure. Impurities in alumina influence the quality of products obtained from alumina during electrolysis. In this research, the purification method presented in our previous paper was used for the purification of Bayer liquor, from which alumina was produced [1]. Crystallization of Bayer liquor was conducted at 52 °C during 24 h, whereas aluminium hydroxide with specific structural properties was used as the seed. The crystallization product (aluminium hydroxide) was calcined at 950 °C for 2 h with the heating rate of 5 °C min–1. The obtained alumina (Alumina I) is compared with alumina obtained without Bayer liquor purification (alumina from bauxite refinery „Alumina“ l.t.d., Zvornik, B&H – Alumina II). Zinc content is determined by atomic absorption spectroscopy. Structural and morphological properties are characterized by XRD, FT‐IR, N2‐physisorption, and particle size analyzer. Zinc content as ZnO in the initial and purified Bayer liquor was 0.0494 g dm–3 and 0.0057 g dm–3, respectively. Alumina from bauxite refinery contains 0.0260% ZnO, whereas the zinc content in alumina obtained after Bayer liquor purification was 0.016% ZnO. XRD analysis (Figure 1) showed that crystal structure is not destroyed and characteristic lines for both samples are at a 2Theta angle: 34.2, 37.2, 40.7, and 49.8. Bands characteristic for γ‐Al2O3 and α‐Al2O3 in pseudoboehmite structure can be observed at low wavenumbers in the obtained FT‐IR spectra [2]. Specific surface area and average pore diameter are shown in Table 1. These values are similar for both alumina samples.
PB  - Hrvatska: Hrvatsko društvo kemijskih inženjera i tehnologa
(HDKI)
C3  - Book of Abstracts - 26th Croatian Meeting of Chemists and Chemical Engineers with international participation and 4th Symposium Vladimir Prelog
T1  - Alumina production from purified Bayer liquor
T1  - Proizvodnja glinice iz pročišćene Bayerove otopine
SP  - 182
UR  - https://hdl.handle.net/21.15107/rcub_cer_3796
ER  - 

@conference{
author = "Milovanović, Biljana and Oljača, Đurđa and Pavlović, Stefan and Ostojić, Gordana and Obrenović, Zoran",
year = "2019",
abstract = "Removal of some impurities from Bayer liquor, such as zinc compounds, allows obtaining alumina with low content of impurities incorporated in the crystalline structure. Impurities in alumina influence the quality of products obtained from alumina during electrolysis. In this research, the purification method presented in our previous paper was used for the purification of Bayer liquor, from which alumina was produced [1]. Crystallization of Bayer liquor was conducted at 52 °C during 24 h, whereas aluminium hydroxide with specific structural properties was used as the seed. The crystallization product (aluminium hydroxide) was calcined at 950 °C for 2 h with the heating rate of 5 °C min–1. The obtained alumina (Alumina I) is compared with alumina obtained without Bayer liquor purification (alumina from bauxite refinery „Alumina“ l.t.d., Zvornik, B&H – Alumina II). Zinc content is determined by atomic absorption spectroscopy. Structural and morphological properties are characterized by XRD, FT‐IR, N2‐physisorption, and particle size analyzer. Zinc content as ZnO in the initial and purified Bayer liquor was 0.0494 g dm–3 and 0.0057 g dm–3, respectively. Alumina from bauxite refinery contains 0.0260% ZnO, whereas the zinc content in alumina obtained after Bayer liquor purification was 0.016% ZnO. XRD analysis (Figure 1) showed that crystal structure is not destroyed and characteristic lines for both samples are at a 2Theta angle: 34.2, 37.2, 40.7, and 49.8. Bands characteristic for γ‐Al2O3 and α‐Al2O3 in pseudoboehmite structure can be observed at low wavenumbers in the obtained FT‐IR spectra [2]. Specific surface area and average pore diameter are shown in Table 1. These values are similar for both alumina samples.",
publisher = "Hrvatska: Hrvatsko društvo kemijskih inženjera i tehnologa
(HDKI)",
journal = "Book of Abstracts - 26th Croatian Meeting of Chemists and Chemical Engineers with international participation and 4th Symposium Vladimir Prelog",
title = "Alumina production from purified Bayer liquor, Proizvodnja glinice iz pročišćene Bayerove otopine",
pages = "182",
url = "https://hdl.handle.net/21.15107/rcub_cer_3796"
}

Milovanović, B., Oljača, Đ., Pavlović, S., Ostojić, G.,& Obrenović, Z.. (2019). Alumina production from purified Bayer liquor. in Book of Abstracts - 26th Croatian Meeting of Chemists and Chemical Engineers with international participation and 4th Symposium Vladimir Prelog
Hrvatska: Hrvatsko društvo kemijskih inženjera i tehnologa
(HDKI)., 182.
https://hdl.handle.net/21.15107/rcub_cer_3796

Milovanović B, Oljača Đ, Pavlović S, Ostojić G, Obrenović Z. Alumina production from purified Bayer liquor. in Book of Abstracts - 26th Croatian Meeting of Chemists and Chemical Engineers with international participation and 4th Symposium Vladimir Prelog. 2019;:182.
https://hdl.handle.net/21.15107/rcub_cer_3796 .

Milovanović, Biljana, Oljača, Đurđa, Pavlović, Stefan, Ostojić, Gordana, Obrenović, Zoran, "Alumina production from purified Bayer liquor" in Book of Abstracts - 26th Croatian Meeting of Chemists and Chemical Engineers with international participation and 4th Symposium Vladimir Prelog (2019):182,
https://hdl.handle.net/21.15107/rcub_cer_3796 .