Претрага
2726 items
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... and the most accurate of the two methods of pumping design discussed in this chapter. The foundation of this method is the numerical solution of the wave equation for the sucker rod string. This requires knowledge of the pumping unit characteristics and assumed pump operating. conditions in order ...
... conditions. In any case, pumping fluid with a high number of strokes and a shorter stroke length are unfavorable operating conditions for the standing valve. It is clear that the lifespan is also affected by the presence of abrasive particles, corrosion, and even the presence offree gas in the ...
... easier to open the lower traveling valve. All considerations for the standing valve regarding operating conditions also apply to the traveling valve. The dimensions and configuration of the internal diameter of the valve body should ensure adequate clearance and fluid flow with minimal pressure drop ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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Optimisation of underground mine decline development system using genetic algorithm
... type-One poin Chromosome mutation probability 0.02 Random selection probability 0.1 C = 0.5; α = 1; β = 1 Maximum number of generations 100 Termination condition-Maximum number of generations Figure 1 - Locations of the MPF and access points (plan view) The best design ...
... are replaced in the new version of the software tool, DOT2, by a method based on an understanding of exact solutions to a constrained 3-dimensional path problem. Their approach is based on the minimization of the cost of the decline, where the cost is a combination of both development and haulage ...
... hypothesis used in the optimisation model are as follows: - Location of MPF is fixed; - Location of SBP is allowed to vary; - Location of UMCP is allowed to vary; - Locations of the access points are fixed; - The tonnage of ore to be hauled from each orebody to the surface portal is fixed. ...Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović. "Optimisation of underground mine decline development system using genetic algorithm" in Underground mining engineering, Beograd : Univerzitet u Beogradu – Rudarsko–geološki fakultet (2014)
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Parametri zbijanja komunalnog otpada određeni različitim laboratorijskim metodama
Jovana M Janković Pantić, Dragoslav R Rakić, Irena G Basarić Ikodinović, Tina D Đurić, Snežana Bogdanović (2021)Zbijanje komunalnog otpada predstavlja jednu od osnovnih faza korišćenja komunalne deponije. Zbog toga je kao i kod drugih nasutih građevina, veoma korisno odrediti parametre zbijanja: maksimalnu suvu zapreminsku težinu (dmax) i optimalnu vlažnost (wopt). Dobijeni rezultati mogu da posluže prilikom projektovanja kapaciteta deponije kao i prilikom definisanja obradivosti otpada. U dosadašnjoj praksi najčešći način određivanja parametra zbijanja je standardna metoda (Proktorov opit) koja se koristi u mehanici tla, uz eventualnu redukciju energije zbijanja. Međutim, različiti tretmani komunalnog otpada na ...... deponija komunalnog otpada, zbijanje, Proktorov opit, malj sa šiljcima COMPACTION OF MUNICIPAL WASTE BY DIFFERENT LABORATORY METHODS Abstract Тће compaction of municipal waste is опе ог the main phase п operating, е ог ће landfill. Therefore, as with other embankment structures, it is уегу usefull ...
... Mechanics of Biocell landfill settlements, Ph.D Dissertation, New Jersay Institute of Technology, Newark, NY, 2005. ltoh T., Тоећаја 1., Kawano Y., Kameda M., Fukvi S., Koelsch F., and Yonai, У : Mechanical Properties of Minicipal Waste Deposits апа Ground Improvement, Proceedings of the Sixteenth ...
... 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 ...Jovana M Janković Pantić, Dragoslav R Rakić, Irena G Basarić Ikodinović, Tina D Đurić, Snežana Bogdanović . "Parametri zbijanja komunalnog otpada određeni različitim laboratorijskim metodama" in Građevinski kalendar, Savez građevinskih inženjera Srbije (2021)
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Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian
The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...... units) and a grammar for named entity tag- ging (Krstev et al., 2014) was produced, and it used Condi- tional Random Fields (Constant et al., 2018). Its major nov- elty was tagging of not only simple words, but also MWUs and named entities. However, it did not perform lemmati- zation. spaCy (Explosion ...
... Computational Linguistics: Human Language Technologies, pages 271–281. Constant, M., Krstev, C., and Vitas, D. (2018). Lexical analysis of serbian with conditional random fields and large-coverage finite-state resources. In Zygmunt Vetu- lani, et al., editors, Human Language Technology. Chal- lenges ...
... previously derived from then latest version of SMD (Utvić, 2011). TT11 tagset consists of 16 tags, most of them acquired from SMD as labels for major Parts-of-Speech (Table 3 column T11). TT11 was used to annotate SrpKor2013, current version of SrpKor – Corpus of Contemporary Serbian.4 As pointed out ...Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić. "Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian" in Proceedings of the 12th Language Resources and Evaluation Conference, May Year: 2020, Marseille, France, European Language Resources Association (2020)
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... to December 31, 2009 The individual well discharges in the model of Šumice were specified in accordance with both the recorded operating hours and discharge rates. The well screens were Journal of Sustainable Development of Energy, Water and Environment Systems Year 2015 Volume 3, Issue ...
... discharge rates of the production wells of the other groundwater sources in the area were specified based on available technical reports [26], as constant values throughout the period. These included the MSK groundwater source, operating two production wells with a total capacity of 54 l/s; the ...
... negligible order of magnitude of dispersion effects), the particle tracking method for the determination of the radius of influence of the groundwater source was used and presented. The maximum well discharge capacity of Šumice was found to be 117.66 l/s, at which the radius of influence of Šumice was ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Legal framework for recultivation of degraded areas caused by mining exploitation
Radmila Gaćina (2023)Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...... protection of agricultural and forest land. Undertaking the exploitation of mineral deposits is obliged to take the necessary measures to protect the resources of the deposit, the surface of the earth ..., successively carry out reclamation 32 Gaćina R. of post-mining areas and restoration of other ...
... adopted on the basis of the above of the law). Legal framework in the field of recultivation of degraded areas ... 33 5 COMPARATION LEGAL FRAMEWORKS IN SERBIA AND OTHER LEADING COUNTRIES Recultivation of degraded areas caused by mining is under supervision of Ministry of Mining and Energy ...
... is a set of works for the rehabilitation (restoration) of productivity and economic value of damaged land, as well as improving the conditions of the surrounding environment. Various terms have been used to describe the repair of land disturbed by mining and other inudtrial use of land use, ...Radmila Gaćina. "Legal framework for recultivation of degraded areas caused by mining exploitation" in Underground mining engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2023). https://doi.org/10.5937/podrad2342027G
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A WebGIS Decision Support System for Management of Abandoned Mines
Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)... pairs of attributes at a hierarchical level were made, for all levels of the entire hierarchy. The tables below give the final result. The verification of consistency ratio (CR) of the AHP model was defined by Sati [16] as: CR = CI/RI, where CI represents the consistency index and RI the random consistency ...
... matrix eigenvalue, and n the number of factors [17]. The random consistency index RI is a table value empirically defined by Sati, which depends on the number of factors within the AHP analysis. If CR < 0.1 (10%) the model is consistent. According to Sati a deviation of CR up to 0.3 (30%) is tolerated ...
... on the territory of the Republic of Serbia. Keywords: WebGIS; geodatabase; abandoned mines; mine reclamation 1. Introduction Problems of development of cadastre of abandoned mines can be perceived as an important function of modern management of mineral resources (which is part of the broader management ...Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis. "A WebGIS Decision Support System for Management of Abandoned Mines" in Energies 7 no. 9 (2016): 567. https://doi.org/10.3390/en9070567
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Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)
This paper presents the first data on the organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in the East Herzegovina region of the External Dinarides. Representative, organic-rich samples from outcropping sedimentary rocks of different ages in the area (Triassic to Neogene) were selected and analysed. The organic matter was studied by Rock-Eval pyrolysis and under the microscope in reflected non-polarized light and incident blue light. The results obtained show the presence of different types of organic ...... wavelength of 546 nm (Taylor et al., 1998) and in incident �uorescence-mode illumination. A digital cam- era and Fossil so�ware were used for the acquisition of re- �ectance measurements. �e results of vitrinite re�ectance are presented as mean random re�ectance values (% Rr), the number of measurements ...
... wavelength of 546 nm (Taylor et al., 1998) and in incident fluorescence-mode illumination. A digital cam- era and Fossil software were used for the acquisition of re- flectance measurements. The results of vitrinite reflectance are presented as mean random reflectance values (% Rr), the number of measurements ...
... represent a kind of a geothermometer. �e mean random vitrinite re�ectance (%Rr) in oil im- mersion, o�en referred to as %Ro (“o” for oil), which cor- responds to the oil window, varies with the type of organic matter, but also with the heating rate (Welte, 1989). �e on- set of oil generation mostly ...Nikoleta Aleksić, Aleksandar Kostić, Miloš Radonjić. "Composition of organic matter and thermal maturity of Mesozoic and Cenozoic sedimentary rocks in East Herzegovina (External Dinarides, Bosnia and Herzegovina)" in Annales Societatis Geologorum Poloniae (2021). https://doi.org/10.14241/asgp.2021.16
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Conversion of land areas after coal mine closure and reclamation
Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.... Partial ranking of the User-friendly outranking i ; method, completeness of Does not provide a clear method to actions, based on the : ; : . : : Promethee NH : ranking, partial and complete assign weights and it requires the positive and negative . ; . flows ranking of alternatives, random assignment ...
... 2). The subject of our research is the surface mine Drmno viewed as a training: ground for experimental analysis of the choice of the type of reclamation and the appropriate arrangement of the landscape. Such process modeling of the unified reclamation system foresees a total of 10 alternative p ...
... thickness of bulk overburden material is 40-50 m. The area belongs to “Drmno” open pit is in the eastern part of the Kostolac coal basin, 1.e., east of the Mlava River. (Figure 1) igure 1. Location of study area - Drmno The Kostolac mining and energy basin is part of the municipality of Kostolac ...Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić. "Conversion of land areas after coal mine closure and reclamation" in 9th International conference mining and environmental protection MEP 23 Proceedings, Sokobanja, 24-27.05.2023., Belgrade : University of Belgrade - Faculty of mining and geology (2023)
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Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)
Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik (2023)The behaviour and stability of arsenopyrite largely depend on its crystal structure, but studies of crystallography and structural defects are scarce. For clarification, we investigated a series of natural arsenopyrite crystals from the polymetallic Pb-Zn-(±Cu,Ag,Au,Sb,Bi,W) Šumadija-Kopaonik ore district (Serbia) by powder X-ray diffraction (XRPD). Among them, samples from the Drenjak gold mineralisation showed near-stoichiometric FeAsS composition and were further investigated by conventional and high-resolution transmission electron microscopy methods. TEM revealed abundant planar crystallographic defects and epitaxial surface oxide layer ...Inorganic Chemistry, Condensed Matter Physics,General Materials Science, General Chemical Engineering, crystal structure, FeAsS, oxidation, TEM, XRPD... conditions of the Creative Commons Attribution (CC BY) license (https:/ / creativecommons.org//licenses/by/ 4.0/). Faculty of Mining, and Geology, University of Belgrade, Đušina 7, 11000 Belgrade, Serbia Department of Geology, Faculty of Natural Sciences and Engineering, University of Ljubljana ...
... collection curated at the Faculty of Mining, and Geologyy in Belgrade, for the purposes of this study, Crystals 2023, 13, 278 3of11 14 samples from 7 localities of different types of mineralisation (Figure 1a,b) were selected, in which arsenopyrite is one of the most abundant sulphide phases. ...
... 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 crystals Article Crystallography and Surface Oxidation of Stoichiometric ...Ivana Jelić, Aleksandar Pačevski, Aleksandar Kremenović, Aleš Šoster, Andreja Šestan, Janez Zavašnik. "Crystallography and Surface Oxidation of Stoichiometric Arsenopyrite from Šumadija-Kopaonik Pb-Zn/Polymetallic Ore District (Serbia)" in Crystals, MDPI AG (2023). https://doi.org/10.3390/cryst13020278
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Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS
Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan. "Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS" in X Međunarodna konferencija UGALJ, Zlatibor, Srbija, 13-16. Oktobar 2021., Jugoslovenski komitet za površinsku eksploataciju (2021)
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Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example
Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska. "Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2020). https://doi.org/10.1007/978-3-030-60227-7_29
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Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis
U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...... organization of digital resources as important aspects of scholarly work in the classroom settings but often overlooked in general blogging platforms. 1 dalibor.vorkapic@rgf.bg.ac.rs 2 https://omeka.org/ For the digital library presented in this paper, Omeka is installed on operating system ...
... in a virtual machine. This virtual machine uses 8GB of RAM and 127GB of memory which is dynamically allocated on the storage and one virtual Xeon processor that runs at 2.6GHz. There are several preconditions for installing Omeka: • Operating systems on which Omeka can work are: Fedora, OpenSUSE ...
... University of Belgrade – Faculty of Mining and Geology Aleksandra Tomašević University of Belgrade – Faculty of Mining and Geology Miljana Mladenović PhD eVox Solutions Ranka Stanković PhD University of Belgrade – Faculty of Mining and Geology Nikola Vulović University of Belgrade – Faculty ...Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović. "Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis" in International Scientific Conference “Archibald Reiss Days” Thematic Conference Proceedings Of International Significance, Belgrade, 7-9 November 2017, Academy Of Criminalistic And Police Studies Belgrade (2017)
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A survey of greenhouse gases production in central European lignites
Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)... Chavarria, Y., Fortney, J.L., Hugenholtz, P., Simmons, B., Sublette, K., Silver, W.L., Hazen, T.C., 2011. Characterization of trapped lignin- degrading microbes in tropical forest soil. PLoS One 6, e19306. https://doi.org/10. 1371/journal.pone.0019306. Detman, A., Bucha, M., Simoneit, B.R.T., Mielecki ...
... gradient in a gulf coast forest. Chemosphere 62, 905–914. https://doi.org/10.1016/j.chemosphere.2005.05.033. Životic, D., Stojanovic, K., Gržetic, I., Jovancicevic, B., Cvetkovic, O., Šajnovic, A., Simic, V., Stojakovic, R., Scheeder, G., 2013. Petrological and geochemical composition of lignite from the D ...
... and the lower level of natural hazard in comparison to the exploitation of hard coal has made lignite an important source of energy. In 2019, 27 countries de- clared using this resource. In many of them, the combustion of lignite contributed to the generation of a significant part of the energy pro- duced ...Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska. "A survey of greenhouse gases production in central European lignites" in Science of The Total Environment, Elsevier (2021). https://doi.org/10.1016/j.scitotenv.2021.149551
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Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining
... samples or block-shaped rock material samples. The results of laboratory testing allow comparison with test results of rock samples from other mines in which bucket-wheel excavators are already operating. A sufficiently accurate prediction of the cutting resistance can be made only by comparison with ...
... uniaxial compressive strength, σc (kPa), to the cutting resistance per unit area of the slice, KA (kPa), based on experience with a large number of operating bucket- wheel excavators and uniaxial compressive strength test results of rock samples excavated by these machines (Figure 6). σ σ σ σ σ Figure ...
... and instead of the second coal layer average depth of 50 m, a maximum depth of 60 m was employed (Figure 5). Figure 5. Schematic representation of the geological coal and gravel deposit, “Kovin”, with pressure changes with increasing depth. Minerals 2021, 11, 564 5 of 17 5. Methodology of Cutting ...Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić. "Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11060564
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The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia
For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...... and therefore the operating costs. From the aspect of local self-government, the way of waste treatment is being improved, a certain number of workers of lower social status are employed and a positive economic effect is achieved. From a citizen's perspective, the introduction of a quality organization ...
... advantages of the presented technical solution for the treatment of municipal waste are multiple. From the point of view of achieving national goals, the level of recycling increases and obtains the necessary raw material for the work of the recycling industry. The mass and volume of the final disposed ...
... become the integral part of the inhabited area. The landfill covers an area of about 13.5 ha, and the estimated volume of disposed waste is about 1800000 m3. The landfill is formed in alluvial plane of the left valley side of the West Morava River, i. e. left valley side of the Atenica River, which ...Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić. "The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia" in 17th International waste management and landfill symposium, Proceedings SARDINIA 2019, CISA Publisher (2019)
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Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia
Finds of Pleistocene rhinoceros are rare in Serbia, and only one species (the woolly rhinoceros Coelodonta antiquitatis Blumenbach, 1799) has been reported so far. The current paper presents the dental material of an extinct so-called Hundsheim rhinoceros, Stephanorhinus hundsheimensis Toula, 1902 from Bogovina Cave (East ern Serbia). Both the morphological and metric characteristics of the teeth are consis tent with the attribution to S. hundsheimensis. Unfortunately, the rhinoceros material originated from an uncertain geological context, so there is no ...... palaeoenvironmental conditions, ranging from a warm-temperate climate with dense mixed forest to conifer forest to cold-temperate climate with open xerophytic communities and steppe with birch trees (Betula sp.) and sparse woodland patches (Rav- azzi et al., 2009). Recently, Szabó et al. (2017) had evaluated ...
... Geographical and geological location of Bogovina Cave. A) Terrain in the vicinity of Bogovina Cave with simplified geological map (after Veselinović et al., 1964). Elevation of the terrain is exaggerated several times. B) Posi- tion of Bogovina Cave in the central part of the Balkan Peninsula. PALAEO- ...
... or crista. The base of the protoloph is rather bulbous, which is more evident in the lingual view; there is a strong con- striction of the protocone. The outlet of the lingual valley shows an enlarged V-shape in lingual view. The enamel surface shows the presence of a large number of vertical and subvertical ...Predrag Radović, Miloš Radonjić, Emmanuel Billia. "Pleistocene rhinoceros from Bogovina Cave: the first report of Stephanorhinus hundsheimensis Toula, 1902 (Mammalia, Rhinocerotidae) from Serbia" in Palaeontologia Electronica, Coquina Press (2020). https://doi.org/10.26879/985
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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)
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Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential
The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти... weekends than on weekdays can be expected. The modular approach presented in this paper addresses the issues of flexibility in the use of certain features and mitigation of operating costs for periods of lower demand. High seasonal sensitivity implies that the facility may operate only during the summer, so ...
... minimizes contact among users of different treatments while allowing optimal hygiene and maintenance intervals during operating hours. Figure 11. Visualization of proposed model for wellness and spa facilities. Appl. Sci. 2021, 11, 2691 16 of 24 The modular design also permits capacity expansion ...
... which is conditioned by the application of geothermal heat pumps [41], while Veliko Banatsko Selo comes with hydrogeothermal resources accumulated in the groundwater of temperature above 30 ◦C, which means direct use is possible. Therefore, the heating operating system on the Ljuba site is considered to ...Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić. "Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential" in Applied Sciences-Basel, МDPI (2021). https://doi.org/10.3390/app11062691
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Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs
John Nyame (2024)The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...... According to the report of the Global Carbon Capture and Storage Institute, the capture capacity of operating large-scale CCS facilities has increased from 31.2 Mt/year in 2017 to 39.2 Mt/year in 2019. At the same time, the total capacity of all facilities, at all stages of development, has increased ...
... units operating between 300%C and 900%C. Most of these plants operate on a relatively small scale for testing and demonstration purposes in Europe and the Americas while a few for utilization. The capacity of the first large scale DAC technology is in development in the United States of America ...
... material of the membrane in addition to its configuration, morphology, composition, and operating conditions are all key factors that dictate its CO- performance to a great extent [41]|. Membrane separation for the removal of CO» from power plant flue gas streams has been the subject of many studies ...John Nyame. Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs, 2024