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master's thesis
Ergopodručja
Zagreb: University of Zagreb, Faculty of Science, 2019. urn:nbn:hr:217:508276
Bokulić, Ana
University of Zagreb
Faculty of Science
Department of Physics

Institutional repository: Repository of the Faculty of Science

Cite this document

Bokulić, A. (2019). Ergopodručja (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:508276

Bokulić, Ana. "Ergopodručja." Master's thesis, University of Zagreb, Faculty of Science, 2019. https://urn.nsk.hr/urn:nbn:hr:217:508276

Bokulić, Ana. "Ergopodručja." Master's thesis, University of Zagreb, Faculty of Science, 2019. https://urn.nsk.hr/urn:nbn:hr:217:508276

Bokulić, A. (2019). 'Ergopodručja', Master's thesis, University of Zagreb, Faculty of Science, accessed 11 March 2025, https://urn.nsk.hr/urn:nbn:hr:217:508276

Bokulić A. Ergopodručja [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2019 [cited 2025 March 11] Available at: https://urn.nsk.hr/urn:nbn:hr:217:508276

A. Bokulić, "Ergopodručja", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:217:508276

Metadata
TitleErgopodručja
Title (english)Ergoregions
AuthorAna Bokulić
MentorIvica Smolić (mentor)
Committee memberIvica Smolić (predsjednik povjerenstva)
Committee memberMaro Cvitan (član povjerenstva)
Committee memberMatko Milin (član povjerenstva)
Committee memberDavor Horvatić (član povjerenstva)
Committee memberMihael Makek (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Physics)
Zagreb
Defense date and country2019-08-27, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract
Lense-Thirringova precesija općerelativistički je efekt koji nastaje kao posljedica ”povlačenja” prostorvremena oko rotirajućeg tijela. Efekt se opaža i u blizini Zemlje, gdje je eksperimentalno provjeren sondom Gravity Probe B. Ekstremni oblik Lense- Thirringove precesije javlja se u ergopodručjima, dijelovima prostorvremena unutar kojih su svi fizikalni promatrači prisiljeni rotirati zajedno s objektom koji ju uzrokuje. Zbog svojih svojstava, ergopodručja omogućuju ekstrakciju rotacijske energije objekta mehanizmima kao što je Penroseov proces. U ovom je radu opisana geometrija ergopodručja koja se pojavljuju u rješenjima Einsteinove jednadžbe, s posebnim naglaskom na klasu slabo omedenih ergopodručja. Uz to, analizirane su efikasnosti Penroseovog procesa i njegovih inačica u različitim vrstama prostorvremena.
Abstract (english)
Lense-Thirring precession is an effect predicted by general relativity which arises due to the dragging of spacetime near rotating body. This effect can be observed in the vicinity of Earth, where it was experimentally confirmed using the Gravity Probe B satellite. Extreme version of Lense-Thirring precession can be found inside ergoregions, parts of spacetime in which all physical observers must corotate with the object causing the aforementioned effect. Because of its properties, it is possible to extract rotational energy from ergoregions via physical mechanisms such as Penrose process. In this work we will describe the geometry of the ergoregions that appear in the solutions of Einstein’s equation, with special emphasis on a subclass of ergoregions called weakly bounded. Additionally, we analyse the efficiency of Penrose process and its variants in different types of spacetimes.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:508276
Study programmeTitle: Physics; specializations in: Research
Course: Research
Study programme type: university
Study level: integrated undergraduate and graduate
Academic / professional title: magistar/magistra fizike (magistar/magistra fizike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2020-01-07 10:03:20