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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

An Integrated Assessment of GIS-MCA with Logistics Analysis for an Assessment of a Potential Decentralized Bioethanol Production System Using Distributed Agricultural Residues in Thailand

Jusakulvijit, Piradee, Bezama, Alberto, Thrän, Daniela 01 December 2023 (has links)
No description available.
12

Assessing Offshore Wind Power Potential in Fiji : A GIS-based Site Suitability and Feasibility Analysis

Askenberger, Felix, Renefalk, Victor January 2023 (has links)
Renewable energy, including offshore wind power, is expected to play a significant role in mitigating climate change and meeting a growing demand on electricity. Fiji, a Small Island Developing Nation in the South Pacific, needs large quantities of additional renewable energy to achieve its NDC goals and has good natural resources for offshore wind power. The purpose of the study is to analyse the technical potential for fixed and floating offshore wind power, identify the most suitable site (s), perform economic feasibility analysesfor different-sized offshore wind farms and determine possible emission reductions from offsetting electricity generation based on fossil fuels. The objectives are achieved through a literature study, interviews, a GIS-based multi-criteria site suitability analysis and feasibility calculations. In the study it was concluded that there is great potential for offshore wind power in Fiji. There are large areas with technical potential for fixed and floating offshore wind power and the most suitable sites, both located in the Bligh waters, have average wind speeds of 8.6 m/s and 8.5 m/s. The potential for offshore wind power was concluded to be large enough for Fiji’s needs, economically feasible and potentially competitive to invest in. The simple payback time would be approximately 13.5 years and the cost of electricity would be 0.13 USD/kWh, which is lower than the feed-in tariff for Fiji’s national grid at 0.15 USD/kWh. Different-sized offshore wind farms and its possible emission reductions could contribute with between 12-37% of Fiji’s NDC goal to reduce emissions from the energy sector by 30% compared to a business as usual scenario as well as contribute to have 99% renewable grid-connected electricity generation by 2030. However, during the study, it was concluded an implementation of offshore wind power in Fiji would require large investments, large capacities of energy storage, frequency regulating services and there are potential environmental and social impacts have to be taken into consideration. There is also a need for further research on how to cyclone-proof offshore wind farms in Fiji. / Förnybar energi, inklusive havsbaserad vindkraft, förväntas spela en avgörande roll för att minska klimatförändringarna och för att möta en ökande efterfrågan på elektricitet. Fiji, en liten önation i Stilla havet, behöver stora mängder ytterligare förnybar energi för att nå sina NDC mål och har bra naturresurser för havsbaserad vindkraft. Syftet med studien är att analysera den tekniska potentialen för fixerad och flytande havsbaserad vindkraft, identifiera de mest lämpliga platserna, utföra ekonomiska lönsamhetsanalyser för olika stora havsbaserade vindkraftsparker och avgöra möjliga utsläppsminskningar genom att avsätta elproduktion baserad på fossila bränslen. Målen uppfylls genom en litteraturstudie, intervjuer, GIS-baserad multikriterie platslämplighetsanalys och genomförbarhetsberäkningar. I studien drogs slutsatsen att det finns stor potential för havsbaserad vindkraft i Fiji. Det finns stora områden med teknisk potential för fixerad och flytande havsbaserad vindkraft och de mest lämpliga platserna, båda belägna i Bligh waters, har genomsnittliga vindhastigheter på 8.6 m/s och 8.5 m/s. Potentialen för havsbaserad vindkraft bedöms vara stor nof för Fijis behov, ekonomsikt genomförbart och potentiellt konkurrenskraftigt att investera i. Återbetalningstiden bedöms vara ungeför 13.5 år och elektricitetskostnaden 0.13 USD/kWh, vilket är lägre än inmatningstaxan till Fijis nationella elnät som är på 0.15 USD/kWh. De 12-37% av Fijis mål om att minska utsläppen från energisektorn med 30% jämfört med ett business as usual scenario liksom bidra till att ha 99% förnybar elnätsansluten elgeneration till 2030. Men, i studien drog också slutsatsen att en implementering av havsbaserad vindkraft i Fiji skulle kräva stora investeringar, stora mängder energilagring, frekvensreglerande tjänster och det finns potentiella miljömässiga och sociala effekter som måste tas i hänsyn. Det finns också behov av ytterligare forskning om hur man kan cyklon-säkra havsbaserade vindkraftsparker i Fiji.
13

數位化原住民農耕知識之策略─以尖石泰雅族部落為例 / The Strategy For Digitization of Indigenous Knowledge of Farming ─ A Case Study of the Atayal Communities in Jianshih Village

張孟瑄 Unknown Date (has links)
原住民農耕知識乃長期適應自然環境,並與自然達成平衡關係之農耕方式,因此藉由探討原住民農耕知識,得提供高山農業政策上的建議。惟偏向質性的原住民知識,需萃取、轉化為科學形式,方能利用。是以,本研究以地理資訊系統為基礎、利用土地適宜性分析與羅吉斯迴歸為方法,設計一套適用於數位化原住民農耕知識的策略。此策略為一個迭代的循環,包含蒐集、轉換、分析與檢視的程序。首先,以量化方式蒐集原住民農耕知識,次將知識轉換成空間資料的形式,再透過分析將知識轉化成有意義的資訊,並以視覺化方式展示分析成果,而分析成果可用以檢視知識蒐集的完整性、檢驗知識轉換後的正確性,進而以為基礎,針對興趣點再度蒐集知識,如此反覆操作上述程序。以土地適宜性分析為核心之策略,可用以探究原住民農耕區位選取知識;以羅吉斯迴歸為主軸之策略,則以個別農耕地為基礎,驗證農耕行為與邊坡穩定性之關聯。本研究以尖石泰雅族部落為研究區域。研究發現此數位化原住民農耕知識策略是可行的,得以有效地達到原住民農耕知識蒐集、分析及展示的目標。數位化後的原住民農耕知識具體而明確,可作為相關政策之參考。 / Indigenous knowledge of farming is empirical rules based on a long-term interaction between human and organism which benefit to each other. As a result, by discussing indigenous knowledge of farming, it could provide positive suggestions for the cultivation on slope land. However, indigenous knowledge tends to be qualitative rather than quantitative. Thus, we need to translate it into a scientific formats so as to take use of it. Consequently, the paper which is based on GIS, utilizes land use suitability analysis and logistic regression aims to establish a strategy for digitizing indigenous knowledge of farming. Actually, the strategy is an iterative circle with the procedure of extraction, translation, analysis and review. Firstly, investigate indigenous knowledge of farming in quantitative way. Secondly, translate it into layers. Then, turn the fragmentary data into meaningful information, and illustrate it on the map. Finally, review the result whether it is comprehensive and reliable. We used land use suitability analysis as the strategy to explore indigenous knowledge of farming site selection. Similarly, we use logistic regression as the strategy to demonstrate the correlation between the practice of farming and slope stability. The Atayal communities in Jianshih village was used for testing of the above strategy. In conclusion, the strategy for digitizing indigenous knowledge of farming is feasible for investigating, analyzing and visualizing the indigenous knowledge of farming. Therefore, the result is quite clear and specific as an important supplement to policy.

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