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Упит dcterms_subject_txt:Deformation history

227 items

  • 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 ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... strings and the fluid through in which they move. – Internal Friction: Within the material of the rod strings and tubing, which occurs due to deformation under stress [3,4]. Walking Beam Equalizer Bearing Horsehead — Horsel Equalizer Pitman Crank Gear Reducer Wireline Hanger (Bridle) ...
    ... ball and seat are specially designed and made from high-alloy steel with special surface treatments. This is crucial, as even minor damage or deformation can lead to leakage, thereby reducing the efficiency of the pumping process. For new valves of different diameters, the deviation of the ball's ...
    ... and Geology Belgrade prof. dr Dejan Ivezić, member Faculty of Mining and Geology Belgrade Defense date: SUMMARY 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 ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... pertaining to geoheritage and geodiversity of North-Western Serbia represents the Adriatic geotectonic unit through different cycles of geological history, in the time span between 390 and 65 million years. This part of the portal was Development of the Serbian Geological Resources Portal ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... own pace, but also outside the classroom. They are tackling mathematics and computer programming, primarily, while for other languages also history, art history, economics and others are available. Their mission in mathematics encourages children from kindergarten to tackle mathematical analysis with ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... reflects 2 Social network Facebook allows all its users to download a single ZIP file that contains all of their current multimedia files and chat history via settings on personal profile tab. Infotheca Vol. 17, No. 1, 2017 71 Škorić M., “Classification Based on Emoticons”, pp. 67–91 their feelings ...
    ... Explorer catalogue in which user selects a file from the local computer in the usual way. The tool currently supports only files that contain chat history of Facebook social network, and the only file format available for selection is htm. The Infotheca Vol. 17, No. 1, 2017 73 Škorić M., “Classification ...

  • Terminological and lexical resources used to provide open multilingual educational resources

    Biljana Lazić, Danica Seničić, Aleksandra Tomašević, Bojan Zlatić (2016)
    Open educational resources (OER) within BAEKTEL (Blending Academic and Entrepreneurial Knowledge in Technology enhanced learning) network will be available in different languages, mostly in the languages of Western Balkans, Russian and English. University of Belgrade (UB) hosts a central repository based on: BAEKTEL Metadata Portal (BMP), terminological web application for management, browse and search of terminological resources, web services for linguistic support (query expansion, information retrieval, OER indexing, etc.), annotation of selected resources and OER repository on local edX ...
    otvoreni obrazovni resursi, leksički resursi, obrada prirodnih jezika, terminologija
    ... acquired systematically in all languages involved, which would lead to equivalent opportunities and up to date education materials. Firstly, a brief history and current state of the art of terminological resources are presented, followed by an overview of BAEKTEL (Blending Academic and Entrepreneurial ...

  • Palaeoflora of Kamenica (Pranjani Basin, western Serbia)

    Zorica Lazarević, Ljubica Milovanović, Jelena Milivojević, Ivana Vasiljević (2019)
    Palaeofloras of the Paleogene in Serbia are relatively rare, especially in comparison with floras from Neogene sediments. Most Paleogene phytoas sociations from the territory of Serbia existed in a dry and warm climate. The youngest Paleogene phytoassociation originates from the Pranjani Basin (Western Serbia), locality Kamenica. The age of this palaeoflora is determined as Late Oligocene. This fossil plant assemblage is different from other Paleo gene phytoassociations.The palaeoflora from Kamenica is characterized with leaf imprints larger than in other ...
    макрофлора, млађи олигоцен, Прањански басен, Каменица
    ... Late Oligocene. Acknowledgments We thank reviewers, for their suggestions and com- ments on our manuscript: deSa đOrđevIć-MILuTINOvIć (Natural history Museum of Belgrade) and other anony- mous reviewer. We also would like to thank LIdIja BeKO for review english text. This work was supported by grants ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    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.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... Sustainability 12.5 (2020): 2015. https://doi.org/10.3390/su12052015 Jackson, S.T., Hobbs, R.J. Ecological restoration in the light of ecological history. 2009 Science 325, pp 567-569 https://doi.org/10.1126/science.1172977 Seastedt, T.R., Hobbs, R.J., Suding, K.N. Management of novel ecosystems: ...

  • Geonasleđe Golije i Peštera

    Ljiljana V. Grujičić-Tešić (2017-09-01)
    Sprovedena istraživanja u ovoj studiji obuhvatila su izdvajanje, opis, evaluaciju i valorizaciju objekata geonasleđa u cilju razvoja istraživane oblasti sa stanovišta geonauka, geoturizma i geoekologije. Na izučavanom području objekti geonasleđa su evidentirani, interpretirani, vrednovani i kategorisani, dat je predlog promocije geoobjekata, i na kraju predložena dopuna inventara objekata geonasleđa Srbije.U protekle četiri godine, na kompleksu geotopa Golije i Peštera istražena su geološka svojstva stena (tip stene, starost, fosilni sadržaj, morfološke i hidrogeološke karakteristike itd.), na osnovu čega je bilo ...
    geodivezitet, geonasleđe, geoturizam, geokonzervacija, Golija, Pešter
    ... of the Natural History Museum.1. pp. 41–63. Maran, A. (2010): Valuing the geological heritage of Serbia. Bulletin of the Natural History Museum. 3: 47–66. Maran Stevanović, A. (2014): Zaštita paleontološkog nasleđa Srbije - od filozofije do prakse. Bulletin of the Natural History Museum. 7:7–28 ...
    ... Zavod za zaštitu prirode Srbije. Beograd. 58. str. 27 - 37. Burek, C. V., Prosser C. D. (2008): The history of geoconservation: an introduction In Burek, C.V. & Prosser, C.D. (eds.) The History of Geoconservation. Geological Society. London. pp.1 - 5. Brković, T., Malešević, M., Urošević, M. ...
    ... Doktorska disertacilja GEONASLEĐE GOLIJE I PEŠTERA 166 Hose, T. A. (2008a): Towards a history of Geotourism: definitions, antecedents and the future In Burek, C.V., Prosser, C.D. (eds.) The History of Geoconservation (Special Publication 300). London: Geological Society. London. pp.37 - 60 ...

  • Electronic Dictionaries - from File System to lemon Based Lexical Database

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Mihailo Škorić (2018)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    ... relates lexical variants (for instance, istorija and historija ‘history’), full forms and their abbreviation (e.g. kilogram and kg), derivationally re- lated lexical entries (e.g. istorija and istorijski ‘relating to the study of history’), and different pronunciations (Eka- vian dete and Ijekavian ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... naturally raises the question if the above rotations can be related to deformations within the belt, since there is ample evidence for post-Oligocene deformation events there (Schefer et al. 2011; Mladenović et al. 2015). The answer is no, for the change in the orientation of the stress or strain field ...
    ... we can rely on the model of Toljić et al. (2012) who account for the 70� vertical-axis CW rotation as being due to large scale extensional deformation terminating before Mid-Miocene. Fig. 11 Comparison of the overall mean paleomagnetic directions of the present study with those expected for a ...
    ... Only a single locality (Cretaceous limestone at locality No. 8, see Fig. 2) is located in the East Vardar unit. The early geological and tectonic history of the Vardar zone is not of direct interest for the interpretation of our results, therefore only a few important events will be high- lighted ...

  • WebGIS Cadastre of Abandoned Mines in Autonomous Province of Vojvodina

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2015)
    ... recultivation. The geodatabase model of abandoned mines includes the name, geolocation, administrative affiliation, size, geological structure, history, status and condition of recultivation, implemented measures for remediation and recultivation with supporting multimedia records (photographs) for ...

  • Prvi nalazi repatih vodozemaca (Urodela) u pleistocenskoj pećinskoj fauni Srbije; još jedna kockica u slagalici

    Dragana Đurić, Katarina Bogićević, Draženko Nenadić, Mihajlo Jovanović, Aleksandra Savković (2023)
    Fosilna fauna pleistocenskih pećina odslikava sastav faune njihove okoline. Najčešće se u njima naleze ostaci krupnih sisara ledenog doba koji su je koristili kao stanište. Uz njih česti su i ostaci drugih sitnih kičmenjaka kao što su sitni sisari, ribe, vodozemci, gmizavci i ptice. Ostaci sitnih kičmenjaka u većini slučajeva u pećinu dospevaju kao plen grabljivica (ptice i sisari) ali je manji broj njih pećinu koristio i kao sklonište ili stanište. U proučavanje fluktuacija pleistocenske klime sve češće se ...
    ... TAILED AMPHIBIANS (URODELA) IN THE PLEISTOCENE CAVE FAUNA OF SERBIA; ANOTHER PIECE IN THE PUZZLE Dragana Đurić, PhD, Museum advisor, Natural History Museum, Njegoševa 51, 11000 Belgrade dragana.djuric(o)nhmbeo.rs Katarina Bogićević, PhD, Full Professor, University of Belgrade-Faculty of Mining ...

  • Еоценска фауна југозападног дела Сирт басена (Либија)

    Љупко Рундић, Мери Ганић (2020)
    Еоцен, крупни мекушци, нумулити, ЈЗ Сирт басен, Либија

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... of weak points is needed, leading to a reduction of risk. A prerequisite for such an analysis is the creation of a comprehensive database with a history of injuries and conditions that led to an injury, so that in the future preventive measures can be taken. Companies often do not recognize all ...

  • Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise

    Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)
    Multidisciplinary

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... K-{s{a{,, + AAAAAA 1 Foreword. Osnivanje i istorijat Centra za hidrogelogiju karsta ......................oL...ooooooooiiiiaaaa da 3 Creation and history of the Centre for Karst Hydrogeology.........c.c.caaaaaaaaa a 3 Naučno istraživačka delatnost Centra za hidrogeologiju karsta .................. ...
    ... planovi pećina „iz kojih periodično izviru reke i potoci“, kao i prvi inventar i klasifikacija izvora, takođe su deo ovih studija. Creation and history of the Centre for Karst Hydrogeology Circumstances and reasons for creation of the Centre (Background) Foundation of the Center for Karst Hy ...
    ... & Mijatović B. (eds) Cvijić and karst/Cvijić et karst. Spec. ed. of Board of Karst and Speleology SASA, Belqrade, p. 305-321. Komatina M, 1997: History and trends of development of hydrogeological exploration methods in Yugoslavia, Monograph “100 Years of hydrogeology in Yugoslavia”, Spec ed. of FMG ...

  • Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event

    Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco (2023)
    Brachiopods, taxonomy, biostratigraphy, early Toarcian Anoxic Event, Bulgaria

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)