Претрага
2778 items
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Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина
Aлександар Додеровић (2024)Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритамAлександар Додеровић. Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина, Београд : [А. Додеровић], 2024
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Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije
Branko M. Petrović (2016-07-12)Rotorni bageri su mašine koje se u današnje vreme najviše primenjuju uprocesu masovne eksploatacije uglja zahvaljujući, pre svega, nizu tehničkoeksploatacionihprednosti u odnosu na druge vrste bagera. Raznovrsnirudarsko-tehnički zahtevi otkopavanja doprineli su razvoju nekoliko tipova ovihmašina, tako da svaki od njih ima svoje prednosti i nedostatke u odnosu nadrugi tip.Predmet istraživanja u disertaciji odnosi se na izbor optimalnekonstrukcije strele bagera i njene usaglašenosti sa uslovima radne sredine kojiće vladati na površinskim kopovima lignita Srbije, imajući u vidu složene usloveeksploatacije (velika ...površinski kop, parametri bloka, kapacitet, rotorni bager, strelabagera, geomehanika, stabilnost kosina, ekonomija... EXPERIMENTAL DIAGNOSTIC OF STRUCTURAL STRENGTH. // Structural integrity and life, 10, 1(2010), pp. 3-10. 169 [33.] Meyer T.; MINING AND HAULAGE OF COAL IN OPEN PIT MINES PARTICULARLY WITH REGARD TO SELECTIVE MINING, International Workshop Coal Quality Management-MAREN 2011, Lazarevac ...
... the conditions of the working environment, which will prevail on the opencast lignite mines in Serbia, having in mind the complex mining conditions (great depth of synclinal coal dipping, the necessity of selective operation, the presence of unfavorable material from the standpoint of slope stability ...
... OPTIMIZATION IN FUNCTION OF SLOPES STABILITY AND EFFECTIVENESS OF OPERATION ON THE SERBIAN LIGNITE OPEN CAST MINES Summary Bucket wheel excavators (BWE) are machines that are nowadays the most frequently used in the mass mining of coal, thanks to, more than all, a series of technical and ex ...Branko M. Petrović. "Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-07-12)
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Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities
Овај рад представља активности на развоју корпуса ELEXIS-sr, српском додатку вишејезичном анотираном корпусу ELEXIS-а, који се састоји од семантичких анотација и репозиторија значења речи. ELEXIS је паралелни вишејезични анотирани корпус на десет европских језика, који може да се користи као вишејезички репер за евалуацију европских језика са мање и средње развијеним ресурсима. Фокус овог рада је на вишечланим изразима и именованим ентитетима, њиховом препознавању у скупу реченица ELEXIS-sr и поређењу са анотацијама на другим језицима. Разматрају се први кораци ...Cvetana Krstev, Ranka Stanković, Aleksandra Marković, Teodora Mihajlov. "Towards the semantic annotation of SR-ELEXIS corpus: Insights into Multiword Expressions and Named Entities" in Proceedings of the Joint Workshop on Multiword Expressions and Universal Dependencies (MWE-UD) @ LREC-COLING 2024, Turin, May 25, 2024, ELRA and ICCL (2024)
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Business Models for Small-scale Biomass Projects Development
Biomass is recognized as the most promising renewable energy source in Serbia. The share of biomass in Serbian final energy consumption is over 10%, but mostly related to traditional use in stoves and ovens. One of the main obstacles for wider implementation of contemporary biomass facilities is the inexperience of consumers and stakeholders in the implementation of “innovative” business models, especially in the cases of small-scale projects. In this paper, three different business models (public utility company, energy cooperative ...... point of ESCO model implementation, the project of replacement of existing boiler in local school by woodchips boiler has all desirable characteristics. Current energy consumption is too high and significant reduction is possible by implementation of energy efficiency measures. Fuel shift, from coal to ...
... in each of the presented models are presented. 1. Introduction The total technical potential of biomass was estimated in the Energy Sector Development Strategy of the Republic of Serbia to 3.448 million toe [1]. Energy balance of the Republic of Serbia for 2017 [2] shows that the share of wood fuels ...
... no examples of good practice that could be replicated. Into the framework of H2020 BioVill project [3] an attempt for development of small-scale biomass project in the village of Kostojevići (in the municipality of Bajina Bašta) was done. The project aim was the promotion of the concept of “bioenergy ...Dejan Ivezić, Miodrag Gluščević, Marija Živković. "Business Models for Small-scale Biomass Projects Development" in 19th International Conference on Thermal Science and Engineering of Serbia, Niš : Faculty of Mechanical Engineering (2019)
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Energetska efikasnost elektromotora na površinskim kopovima
Snežana Aleksandrović, Ilija Jeftenić (2023)Snežana Aleksandrović, Ilija Jeftenić. "Energetska efikasnost elektromotora na površinskim kopovima" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023. , Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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INVENTS: A Hybrid Mine Ventilation Planning and Design System
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... detailed analysis of necessary airflow volumes for the ventilation of individual workplace locations, often with a very complex geometry. The application of CFD software improves the reliability and quality of the apprehension and verification of air amounts needed for the ventilation of workplaces. ...
... diagram of the novel design concept The outlined system (Figure 3) permits an aerodynamic definition of mine ventilation network based on psychrometric recordings and the use of ResNet software, i.e. the establishment of actual aerodynamic resistance of mine chambers and thus the configuration of the ...
... Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Proceedings of International Scientific Conference of FME Session 4: ...Lilić Nikola, Stanković Ranka, Obradović Ivan. "INVENTS: A Hybrid Mine Ventilation Planning and Design System" in Proceedings of International Scientific Conference of FME Session 4: Automation Control and Applied Informatics , Hong Kong : iConcept Press (2013)
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INVENTS: a hybrid system for subsurface ventilation analysis
Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...... detailed analysis of necessary airflow volumes for the ventilation of individual workplace locations, often with a very complex geometry. The application of CFD software improves the reliability and quality of the apprehension and verification of air amounts needed for the ventilation of workplaces. ...
... diagram of the novel design concept The outlined system (Figure 3) permits an aerodynamic definition of mine ventilation network based on psychrometric recordings and the use of ResNet software, i.e. the establishment of actual aerodynamic resistance of mine chambers and thus the configuration of the ...
... Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Proceedings of International Scientific Conference of FME Session 4: ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "INVENTS: a hybrid system for subsurface ventilation analysis" in Proc. of International Scientific Conference of FME, September 2000, Ostrava, FME (2000)
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New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"
Saša Ivanišević, Dejan Radivojević (2018)геофизички каротаж, депозиционе средине, лежишта угљоводоника, миоцен, пост‐ рифтнo, секвенциона стратиграфија... delta and shore plains are predominantly made of sandstones with siltstone and clay intercalations and local occurrences of coal. Kikinda Formation sediments are deposited in shallow‐water environments and are recognized by progradation and aggradation series (Figure 1a and 1b). Kikinda ...
... s of the shape and characteristics of curves of gamma ray (GR) and specific resistivity (RT) logs. Funnel shape of the GR log points to the reduction in the basin water level and the increase in the level of depositional energy, which leads to the reduction in the content of sha ...
... inconsistencies in the selection of markers in designation and correla‐ tion of hydrocarbon reservoirs, this approach has led to incorrect assessments of oil and gas reserves, confusion in the interpretation of hydrodynamic measurements and reduced efficiency in the process of reservoir management. As ...Saša Ivanišević, Dejan Radivojević. "New approach to correlation of hydrocarbon reservoirs in sandstone layers of the "Mokrin" field"" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia
Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)... landslide analysis and mitigation. Landslide reports (in analogue form) greatly understated the realistic number of landslides (concentrating more on urgent/acute cases), while report quality standard and consistency was uneven (because they were collected by different institutions, depending on the ...
... ion of landslide data and training of municipalities for its monitoring, nicknamed BEWARE (BEyond landslide aWAREness) was implemented by the Geological Survey of Serbia, and the University of Belgrade Faculty of Mining and Geology. The Project partners were UNDP Office in Serbia, Ministry of Mining ...
... project was implemented by the Geological Survey of Serbia, and the University of Belgrade Faculty of Mining and Geology. The Project partners were Ministry of Mining and Energy, Government Office for Reconstruction and Flood Relief of the Republic of Serbia and UNDP Office in Serbia. Project started ...Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović. "Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia" in Advancing Culture of Living with Landslides, Proceedings of 4th World Landslide Forum, Ljubljana 29 May-02 June 2017 3, Berlin : Springer Interantional (2017). https://doi.org/10.1007/978-3-319-53487-9_48
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Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije
Marina D. Ćuk (2018-02-23)Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje... Helsel D, Cohn T. 1988. Estimation of descriptive statistics for multiply censored water quality data. Water Resources Research 24 (12): 1997-2004. 58. Helsel DR, Hirsch RM. 2002. Statistical Methods in Water Resources. Techniques of Water-Resources Investigations of the United States Geological Survey ...
... 2016. Long term behavior of hydrogeological structures associated with faulting: An example from the deep crystalline rock in the Mizunami URL, Central Japan. Engineering Geology 208:114 – 127. 71. ISO 10703. Water Quality – Determination of the activity concentration of radionuclides by high ...
... resolution gamma-ray spectrometry; 1997 (ISO TC 147/WG4). 72. ISO 9696. Water Quality – Measurement of Gross Alpha Activity in Non-saline Water-thick Source Method; 1992 (ISO/TC 147). 73. ISO 9697. Water Quality – Measurement of Gross Beta Activity in Non-saline Water; 1992 (ISO/TC 147). 74. Janičić ...Marina D. Ćuk. "Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-02-23)
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Стање квалитета амбијенталног ваздуха на подручју града Београда
Марко Колачарић (2024)У овом раду анализирано је стање квалитета амбијенталног ваздуха на територији града Београда. Анализа се заснива на праћењу података о загађујућим материјама прикупљеним у 2022. години са шест мерних места на територији града. Загађивачи који су обухваћени овом радом су сумпор-диоксид (SO2), азот-диоксид (NO2), честични загађивачи (PM2.5 и PM10), тропосферски озон (О3) и угљен-моноксид (СО). На основу добијених резултата предложене су мере за побољшање тренутног система. Констатовано је прекорачење законских граница на свим мерним местима, за једну или више ...... mH3a, 3araljuBauu, KBajirTeT Ba3jliyxa, Beorpaji The state of ambient air quality in the area of Belgrade city Abstract: This paper analyzes the air quality status in the city of Belgrade. The analysis is based on monitoring data of pollutants collected in 2022. from six measurement sites within ...
... радовима запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository ...
... was found that legal limits were exceeded at all measurement sites, for one or more pollutants. Keywords: monitoring, analysis, pollutants, air quality, Belgrade CriHcak cJiBHKa: Cmaka 1 Teorpadicku nonoxaj rpana Beorpana Cmaka 2 Knace craOuzaocTu arMocO(epe [9] al aaaaaanaaaaakane 10 CmKa ...Марко Колачарић . Стање квалитета амбијенталног ваздуха на подручју града Београда, 2024
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Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia
Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...... logging and groundwater quality analyses, are shown to be highly relevant in assessing geothermal characteristics. Elevated geothermal gradients (average about 6 "C/100 m), structural assembly, especially Kolubara and Banjska faults, as well as existing occurrences of thermal waters are identified ...
... es of part of the Triassic carbonate reservoir were estimated at the base of the Neogene sediment sequence and as maximal expected temperatures. The temperatures at the contact of the Triassic reservoir with the Neogene cover are calculated as a product of the values of geothermal gradients of the ...
... Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive ...Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić. "Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia" in Proceedings 9th International Conference mining and environmental protection, MEP23, Sokobanja, 24-27th May 2023, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet (2023)
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Hydrogeochemistry of Uranium in the Groundwaters of Serbia
Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić. "Hydrogeochemistry of Uranium in the Groundwaters of Serbia" in Uranium - Past and Future Challenges, Springer International Publishing Switzerland (2015). https://doi.org/10.1007/978-3-319-11059-2_89
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Optimizacija i planiranje površinskih kopova stohastičkim modelima
Dejan R. Stevanović (2015-05-29)Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.... component and treats the problem of optimization of open pit boundaries. Keywords: open pit mine, planning, optimization, stochastic models, coal quality control, uncertainty. Scientific field: Mining Engineering Special scientific field: Exploration of hard mineral resources and ...
... eksploataciju, Aranđelovac, str. 211-220. Stevanović D, Kolonja, B, Stanković, R, Knežević, D, Banković, M, 2014, Application of stochastic models for mine planning and coal quality control, Thermal Science, vol. 18, str. 1361-1372 Stevanović D., Banković M., Pešić M.,G, Stanković R., (2014), Aproach to ...
... 97-21-8. Knudsen, H., P., 1981, Development of a conditional simulation model of a coal deposit, doktorska disertacija, The University of Arizona 237 Korobov, S, 1974, Method for Determining Optimal Open Pit Limits, Rappart Technique, Department of Mineral Engineering Ecole Polytechnique Montreal ...Dejan R. Stevanović. "Optimizacija i planiranje površinskih kopova stohastičkim modelima" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-05-29)
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Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles
Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...... reciprocal of the estimated variance of the measurement. Wi ¼ 1=r2 ¼ 1=½r2E þ ðdE=dVÞ2r2V � ð8Þ where rE and rV are the estimated variances of the potential and volume readings, respectively. The quality of the fit was judged by the values of the sample standard deviation S and the goodness of fit v2 ...
... finally accepted sets of complexes are given in Table 2. Statistical parameters, which determine the quality of the fit, are also given. The spectrophotometric data were evaluated with the aid of the program pHAb 2006 [49] (which also belongs to the Hyperquad family but possesses some additional ...
... � Ž. D.Bugarčić � B. Petrović (&) Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, PO box 60, 34000 Kragujevac, Serbia e-mail: biljanap@kg.ac.rs R. M. Jelić Faculty of Medical Sciences, University of Kragujevac, S. Markovića 69, 34000 Kragujevac, Serbia ...Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović. "Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles" in Monatshefte für Chemie - Chemical Monthly, Springer Science and Business Media LLC (2013). https://doi.org/10.1007/s00706-013-1044-1
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Multi-word Expressions for Abusive Speech Detection in Serbian
Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...... 2020); (3) Training of classifiers for recognizing abusive speech in text using the lexicon content as the training set (Wiegand et al., 2018). On the other hand, high quality corpora of hate speech, offensive speech, and abusive language are just as important for tackling the detection of these phenomena ...
... Amit Sheth. 2018. A quality type-aware annotated corpus and lexicon for harassment research. In Proceedings of the 10th ACM Conference on Web Science, pages 33–36. Leandro Silva, Mainack Mondal, Denzil Correa, Fabrício Benevenuto, and Ingmar Weber. 2016. Analyzing the targets of hate in online social ...
... presented at the end of the paper. 2 Related work The use of offensive and hateful language has been a concern since the early days of the Internet. It has been estimated that the number of MWEs in the lexicon of a native speaker has the same order of magnitude as the number of single words (Moreno-Ortiz ...Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev. "Multi-word Expressions for Abusive Speech Detection in Serbian" in Proceedings of the Joint Workshop on Multiword Expressions and Electronic Lexicons, Association for Computational Linguistics (2020)
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The effect of finite driving rate on avalanche distributions
Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear PhysicsSonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević. "The effect of finite driving rate on avalanche distributions" in Journal of Statistical Mechanics: Theory and Experiment, IOP Publishing (2021). https://doi.org/10.1088/1742-5468/ac1f12
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Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака
Зоран Гојковић (2023)Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...Зоран Гојковић. Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака, Београд : Универзитет у Београду, Рударко - геолошки факултет, 2023
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Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study
Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...... tonicity agents, in- crease product mass, and facilitate rehydration of freeze-dried cakes (Bjelosević et al., 2020). The quality of freeze-dried products depends on the process and formulation parameters, including the choice of cry- o/lyoprotectant and its concentration (Jakubowska et al., 2022; ...
... ns (Trenkenschuh et al., 2021). Regarding the appearance of the cake, the observed “skin formation”, a relatively dense layer of solid on the surface of the cake does not necessarily indicate insufficient quality if other parameters are unchanged (in this case, if no aggregation occurred). It ...
... freeze-drying process, while the rigid structure of the cakes prevented instability problems during storage. An exception was the sample with sucrose only, which collapsed with the loss of structure. The observed collapse impaired the quality of the freeze-dried sample. Redispersibility is the ...Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić. "Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study" in European Journal of Pharmaceutical Sciences, Elsevier BV (2023). https://doi.org/10.1016/j.ejps.2023.106557
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Indeksi kontrole održavanja i korišćenja rotornog bagera
Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić. "Indeksi kontrole održavanja i korišćenja rotornog bagera" in XI Međunarodna konferencija "Ugalj i kritični minerali 2023", CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)