Претрага
442 items
-
Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia
... Geographical position of study area (red poly- gon) within North Macedonia; (c) The geographical position of North Macedonia Elevation (m) BB so- 250 [ 250 - 5oo [Z soo - 750 [___] 750 - 1000 [___] tooo - 1250 [ 1250 - 1500 [O 500 - 1750 BIB - 50 D Testing area [___] Training area ...
... higher likelihood of predicting the ophiolite class in comparison to the RF models, with the former being approximately three times more likely to do so. Specifically, the maximum probability of ophiolite class prediction for the RF models is approximately 2.9%, while that for the KNN models is ...Filip Arnaut, Dragana Đurić, Uroš Đurić, Mileva Samardžić-Petrović, Igor Peshevski. "Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia" in Earth Science Informatics, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s12145-024-01243-4
-
Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics
Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić. "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics" in Minerals, MDPI AG (2024). https://doi.org/10.3390/min14050511
-
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... over other types of excavators. A variety of mining and technical mining requirements contributed to development of several types of these machines, so that each of them has its advantages and disadvantages compared to other type. The subject of the thesis relates to the selection of the optimal ...
... i bolje kapacitetno iskorišćenje bagera. Tehnološki parametri odreska (Slika 3.18.) su: h - visina odreska koja odgovara visini reza (m); So - debljina odreska koja je u funkciji ugla okretanja strele bagera u odnosu na podužnu osu bagera (ϕ) i ugla rezanja (ρ) (m); b - širina odreska ...
... okretanja strele bagera u odnosu na podužnu osu bagera (ϕ). b S0 h r Slika 3.18. - Tehnološki parametri odreska Debljina odreska (So) koja je jednaka debljini reza, se ostvaruje pomeranjem bagera na početku ulaska u novi rez, odnosno, kada je strela rotora u krajnjim položajima ...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)
-
Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma
... patients with thyroid microcarcinoma. Cancer. 1999;86:842Y849. 10. Hazard JB. Small papillary carcinoma of the thyroid: a study with special refer- ence to so-called nonencapsulated sclerosing tumor. Lab Invest. 1960;9:86Y97. 11. Mc Conahey WM, Hay ID, Woolner LB, et al. Papillary thyroid cancer treated at ...Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković. "Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma" in Clinical Nuclear Medicine, Lippincott Williams & Wilkins (2013). https://doi.org/10.1097/RLU.0b013e3182872ed2
-
Dosadašnja saznanja o bijelim boksitima na prostoru Crne Gore
Mia Jovanović, Slobodan Radusinović, Vladimir Simić. "Dosadašnja saznanja o bijelim boksitima na prostoru Crne Gore" in Geološki glasnik (2023)
-
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)
-
Developing Termbases for Expert Terminology under the TBX Standard
... [18]. The system of morphological dictionaries for Serbian, both of sim- ple and compound words has been developed over a very long period, follows the so-called DELA format [8]. The DELAS dictionaries of simple words have reached a very high level of coverage of Serbian, while the DELAC dictionaries of ...
... the sub-tree to be exported. Then, positioned on this node he/she invokes the export wizard and selects the export options [14]. This feature is not so far implemented for GeollSSTerm. r > (5h Izvoz reénika _ . ee®@ (= |S eal BEGYEAD ower == = Sei {Direktni potomci bez korenog évora ] Koreni pojam pO ...
... existing lexical resources to maximize efficiency. Terms extracted from corpora and subsequently translated should be channeled into the company termbase, so that they can be leveraged for other purposes. Acknowledgments. This research was supported by the Serbian Ministry of Education and Science under the ...Ranka Stanković, Ivan Obradović, and Miloš Utvić. "Developing Termbases for Expert Terminology under the TBX Standard" in Natural Language Processing for Serbian - Resources and Applications, Belgrade : University of Belgrade, Faculty of Mathematics (2014)
-
Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia
Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin. "Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia" in Hydrogeology Journal, Berlin, Heidelberg : Springer, International Association of Hydrogeologists (2013). https://doi.org/10.1007/s10040-013-1025-9
-
Contribution to the geotechnical classification of municipal waste landfills in Serbia
Management, Monitoring, Policy and Law, Nature and Landscape Conservation, Geochemistry and Petrology, Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental EngineeringDragoslav Rakić, Irena Basarić, Laslo Čaki, Slobodan Ćorić. "Contribution to the geotechnical classification of municipal waste landfills in Serbia" in Environmental Geotechnics, Thomas Telford Ltd. (2018). https://doi.org/10.1680/jenge.18.00028
-
Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++
Branislava Šandrih, Ranka Stanković (2020)U nauci, industriji i mnogim istraživačkim oblastima, terminologija se brzo razvija. Najčešće, jezik koji je „lingua franca“ za većinu ovih oblasti je engleski. Kao posledica toga, za mnoga polja termini domena su koncipirani na engleskom, a kasnije se prevode na druge jezike. U ovom radu predstavljamo pristup za automatsko izdvajanje dvojezične terminologije za englesko-srpski jezički par koji se oslanja na usaglašeni dvojezični korpus domena, ekstraktor terminologije za ciljni jezik i alat za usklađivanje delova. Ispitujemo performanse metode na domenu ...... module is displayed in Figure 3. Figure 3. Input module of the BiLTe Web application Alignment and Post-Processing Module Aligning with GIZA++ yields a so called “phrase-table”. The alignment works in the following way. GIZA++ reads the two input texts in parallel. Whenever two bilingual chunks appear ...Branislava Šandrih, Ranka Stanković. "Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.6
-
BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations
Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina. "BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations" in 17th International Conference of the open and underwater mining of minerals, Sts. Constantine and Helena Resort, Varna, 18-22 September, Bulgaria, Sofia, Bulgaria : Scientific and Technical Union of Mining, Geology and Metallurgy, (2023)
-
The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>
The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...... incubation milieu causes increase in pepsin activity for 30.7%. Increasing the amount of Al led to a more significant increase of proteolytic activity. So, 3.4-10 M of Al increases pepsin activity for 51.9% (p < 0.01),1.7-:10 +Mfor 72.8%,Wwhile in the presence of 1.7-10 M AI? in incubation milieu ...Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić. "The influence of Al3+ion on porcine pepsin activityin vitro" in Journal of Enzyme Inhibition and Medicinal Chemistry, Informa UK Limited (2008). https://doi.org/10.1080/14756360701841095
-
Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije
Vladimir Šaraba (2021)Sa namerom definisanja hidrogeološke uloge i značaja mikrobiološkog diverziteta odabranih pojava mineralnih voda Srbije, primenom sistema biodetektora, dokazano je prisustvo gvožđevitih, sulfato-redukujućih, sluz-produkujućih, heterotrofnih aerobnih i denitrifikacionih bakterija, na osnovu čega je proračunat rizik od razvoja procesa biokorozije i biohemijske inkrustacije, te zdravstveni rizik. Uz procenu rizika, izvedene su analize skenirajuće elektronske mikroskopije biofilmova i hidrogeohemijsko modeliranje, te makroskopska, otpička i difrakciona ispitivanja naslaga inkrustacije, dok je fizičko-hemijskim analizama utvrđena vrednost ukupne mineralizacije iznad 1 g/L, kao i povišeni ...biohidrogeologija, SEM analize, makroskopska i optička ispitivanja, rendgenska difrakcija praha, hidrogeohemijsko modeliranje, BART analize, metabarkoding analize mikrobioma, fizičko-hemijske analize, starenje bunara (biokorozija, biohemijska inkrustacija i biozarastanje), zdravstveni rizik... izvršeno tonjenje centralnog dela kupe. Danas, ovaj rased maskiraju pojave mineralnih voda, dok je na zapadu rased maskiran vulkanskim nekom Šuplji kamen. Formiranjem tektonskog rova Južne Morave izmenjen je prvobitni kružni, odnosno elipsasti oblik savremene depresije banje ispunjene naslagama neogenih ...
... bogatstva ovog prirodnog resursa. Takođe, mineralne vode ostvaruju i industrijsko-privredni značaj kada sadrže korisne hemijske elemente, odnosno soli i gasove u svom sastavu koji se odgovarajućim tehnološkim procesima mogu dobijati iz njih, dok značajno mesto u životu čoveka dobijaju i kada se odlikuju ...
... elektrona. Potom nastaje neorganski ugljenik i vodonik-sulfid (Obradović et al., 2012). Takođe, ove bakterije mogu da koriste i azot ili amonijumove soli (Kushkevych, 2019). Sulfato-redukujuće bakterije razvijaju se u sredinama sa redoks potencijalima od -200 mV do +50 mV, pri čemu su dominantni anaerobi ...Vladimir Šaraba. Mikroorganizmi - biohidrogeološki indikatori odabranih pojava mineralnih voda Srbije, Beograd : [V. Šaraba], 2021
-
Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike
... strane inženjera u Srbiji. OSVRT NA ISTORIJU I ZNAČAJ INŽENJERSTVA Inženjerstvo kao veština daleko prethodi inženjerstvu kao profesiji. Pronalazak kamene sekire u Paleolitu je jedan od prvih čovekovih inženjerskih dostignuća. U drevnim civilizacijama napravljen je značajan tehnološki napredak koji je ...
... prilikom analiziranja resursa i upravljanja njima, u prvi plan postavi konkurentnost tada je bitno da se resursi posmatraju kao kapital. „U prvom kamenu koji je divljak bacio na gonjenu zver, u prvom štapu koji je dohvatio da skine s drveta plod koji rukama nije mogao dohvatiti, vidimo prisvajanje ...
... future generations. Therefore, it is imperative imposing environmental ethics so that the quantity, quality and reliability of water required to preserve the ecological functions on which humans depend shall be well-maintained, so that the human use of water does not individually or cumulatively compromise ...Мирослав Црногорац, Душан Даниловић, Лола Томић. "Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike" in IX Naučno stručni skup Preduzetništvo, inženjerstvo i menadžment Zrenjanin, 24.10.2020. god., Visoka tehnička škola strukovnih studija u Zrenjaninu (2020)
-
Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... The smooth efficient operation of mining machines without failures requires extensive research, analysis, and scheduled adequate regular maintenance so that a machine can maintain its operational Symmetry 2020, 12, 525 3 of 26 state for an extended period. The time taken to repair one element or ...
... level of subsystem failures. The input data used for this risk assessment were the fuzzy sets from the failure risk assessments for the subsystems, so fuzzification of the input data was not needed in this case. A min–max composition was also applied in the synthesis assessment of the risk level of ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
-
Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова
Milena Rosić (2014-12-05)У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...... писања једначине сагоревања корисно је знати да ће кисеоник прво да се једини са свим атомима угљеника и да формира СО, након тога, са водоником, и да формира Н20, а затим и да са СО формира СО2. Специфични импулс горива (Isp) расте услед брзог пораста температуре. Али једном, када температура ...
... remanence magnetization (MR = 2.95 emu/g). Randomness and presence of competing AFM and FM interactions lead to a frustration of manganese magnetic moments so at low temperatures a spin-glass state appears below Néel temperature ТN = 110 К. Magnetic measurements showed that when concentration x increases ...
... приступ, пошто жељени оксидни производи стварају језгро и расту од остатака сагоревања. Прости оксиди метала се обично припремају термалном разградњом соли метала, као што су карбонати, оксалати, нитрати, ацетати, итд. Са друге стране, мешани оксиди метала, попут ферита, хромита и манганита добијају ...Milena Rosić. "Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-12-05)
-
Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... 3000 10000 15 4000 15000 The intensity of these processes depends largely on the ash fineness (particle size and particle size distribution), so that the pozzolanic reactivity increases with the specific surface of ash. International standard ASTM C 311 describes the procedures of chemical and ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
-
Old or New, We Repair, Adjust and Alter (Texts)
Cvetana Krstev, Ranka Stanković (2020)U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja... ‘cross-words’ (avoiding multiple candidates for reci, but also resolving the preceding adjective ukršten). These dictionary contains all inflective forms,so, for instance, ukrstenih reci (the ginitive form) would be corrected as well – ukrštenih reći-. After the application of the diacritic restoration ...Cvetana Krstev, Ranka Stanković. "Old or New, We Repair, Adjust and Alter (Texts)" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.3
-
Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases
Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić. "Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases" in Chemical Papers, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s11696-021-01884-5
-
Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)