Darbe nagrinėjamas Lietuvos Respublikos jūros erdvių delimitavimas po nepriklausomybės atkūrimo. Pirmiausia pateikiamos jūros erdvių sąvokos, jų delimitavimo principai, nustatyti atitinkamose konvencijose ir Tarptautinio Teisingumo Teismo praktikoje. Po to yra analizuojamos Lietuvos derybos dėl jūros erdvių delimitavimo su kaimyninėmis valstybėmis – aptariama derybų eiga, pateikiamos pozicijos atitinkamais klausimais, jų pagrindimas, derybų rezultatai. Derybų pozicijos bei rezultatai yra vertinami pagal konvencijas, nustatančias jūros erdvių delimitavimą, ir pagal teismų praktiką. / The object of this work is the analysis of maritime delimitation of the Republic of Lithuania after the independence reestablishment. Firstly it is presented maritime definitions, principles of the maritime delimitation established in the conventions and in the case of law. Latter in the work it is analyzed Lithuanian negotiations with the neighbourhood states on the maritime delimitation. It is discussed the processes of the negotiations, presented the positions on the respective questions, the substantiation of the mentioned positions, the results of the negotiations. The positions and outcomes of the negotiations are estimated according to the conventions on the maritime delimitations and according to the case of law.

Energy security is an important phenomenon of the contemporary world. A significant number of oil and gas reserves are located on the seabed. Expansion of oil and gas drilling to deeper and from shore more remote locations can again raise the question of ownership of these deposits. On one hand, there are regions of the world where these disputes over borders of maritime territories escalate into a series of clashes and incidents. On the other hand, there are other areas where states can settle their disputes and cooperate on drilling. The goal of this study is to determine which factors lead to the fact that particularly in the South China Sea disagreement about the boundaries of maritime territories results in the escalation of disputes in comparison with the regions of the North Sea and the Caribbean Sea, where disputes are solved or minimized. These factors are represented by six variables, which are based on three theories: a realist, idealist and constructivist theory of international relations. The first part of this study describes the historical development of current international maritime law with regard to the territorial division of the world's oceans. It is followed by a description of three case areas. The second part deals with the theoretical foundations of the examined factors. In...

This study aims to explore the ability of a multi-criteria decision making with analytical hierarchy process (MCDM-AHP) model to emulate the results of a cost benefit analysis (CBA) model in the context of offshore wind farm siting within the Swedish exclusive economic zone (EEZ). The research question addressed is whether the MCDM-AHP analysis produces similar results to the CBA analysis. In addition to this, the strengths and weaknesses of each model is explored. The MCDM-AHP model employs the spatial criteria in a more basic manner compared to the CBA model, simplifying the evaluation process while still explaining 89.5% of the variation in the CBA model and defining similar areas as suitable. Thus, it can be concluded that the MCDM-AHP model adequately emulates the CBA model within the context of offshore wind farm siting within the Swedish EEZ. However, it is crucial to note that the two models produce outputs on different scales. While the CBA model provides levelized cost of energy (LCOE) values that can be thresholded for investment viability comparisons, the suitability score generated by the MCDM-AHP model remains a relative and arbitrary score within the model. Both models entail uncertainties, limiting their usage beyond making general assumptions or identifying areas of interest. The findings reveal that the CBA model demonstrates greater robustness when confronted with changes in spatial input parameters compared to the MCDM-AHP model. This discrepancy is attributed to the iterative computation process and consideration of flat cost inputs in the CBA model, whereas the MCDM-AHP model represents a linear combination of various spatial parameters. However, the calculated LCOE values in the CBA model are highly sensitive to changes in modeling assumptions regarding external parameters, resulting in significant linear variations. The LCOE values obtained from the CBA model baseline case fall within a range of 52.1 - 98.9 EUR/MWh, which aligns with similar studies, validating the CBA model. Nonetheless, caution should be exercised when considering these results as an accurate representation of the real world due to inherent uncertainties in cost inputs and the LCOE measure. The strengths of the MCDM-AHP model lie in its robustness when the order of relative importance remains stable for key spatial evaluators. It is sensitive to significant changes in water depth and wind speed, which heavily influence its output. The model's simplicity allows for a quick overview of the problem, but it requires assumptions that introduce uncertainties. Validation of the MCDM-AHP model using existing and planned offshore wind farms within the Swedish EEZ was possible but limited by the arbitrary scale and limited validation areas. The comparison between the two models could be enhanced with more comprehensive spatial and economic data for an in-depth CBA model, which could serve as a ground truth for the MCDM-AHP model. Nevertheless, the comparison made in this study considers the CBA model to be closer to the truth, acknowledging the underlying assumptions that should be considered during evaluation. In conclusion, within the context of offshore wind farm siting, the MCDM-AHP model produces outputs that are similar to the CBA model.