Judul: Estimasi Willingness to pay masyarakat terhadap keberlanjutan pilot project PLTAL di Selat Nusa Penida, Bali
Abstrak: Electricity has becomes an important thing in human’s life. The Indonesia’s electricity main source of power is originates from fossils, a nonrenewable resources. The increase of power plant development in fueling electricity demand will have impact on decreasing fossil resources, therefore an alternative electric power originate from renewable resources are needed. One of the energy resource that can developed is ocean current energy. Nusa Penida strait is one of location Pembangkit Listrik Tenaga Arus Laut (PLTAL) pilot project installation with installed capacity ten kilowatt (KW). The presence of PLTAL have given light to 25 street lamps that installed in Toyopakeh village. This study aimed to (1) identify benefit which Toyopakeh village citizens perceived, (2) study the opportunity readiness to pay and estimate the value of willingness to pay citizens of Toyopakeh village, and (3) analize management scheme and PLTAL development in Nusa Penida strait. The economic and sosiocultural benefit perceived by Toyopakeh village citizens in the night are increasing works effectivity for seaweed strapper, shop opened over night, easier to moored jukung and speedboat, ship monitoring, load and unloading, fishing, and ashes disposal. The presence of PLTAL Nusa Penida had less environmental impact probability. Citizens with high income or low income had similar opportunity readiness. Citizens with high academic level had opportunity readiness 1.291 point more than not ready to pay. Based on Turnbull estimator distribution, the mean WTP value was at Rp 7.894,695 and Rp 10.641,891 range, whereas based on Spearmen-Karber calculation, mean WTP value was at Rp 11.768,293. Stakeholder which had been and can be participate directly or indirectly in the PLTAL management and development processes in Nusa Penida divided by 5 types, namely researchers, bureaucration, funding, developer and communities.
Keyword: Bogor Agricultural University, willingness to pay., PLTAL, ocean current energy, Nusa Penida strait

Judul: IPB (Bogor Agricultural University)
Abstrak: The increase of petroleum international market price cause the Indonesian Government impose a petroleum price policy that is rising the national fuel price. The policy, however, highly impact the community in the small islands, especially on the energy sector as the fuel price in the area is much higher than the national fixed market price. In contrast, sustainability of electric supply is needed for tourism development and for social economic activities in such area. To fulfill the electricity requirement in remote areas and small islands, Indonesian government runs the self-sufficient energy village program. In Nusa Penida, an area that consists of three islands in Bali Province, the program is run by developing Energy Tourism Area. The main goal of this study was to build a model of environmentally sound management of energy in the small islands, the case of Nusa Penida in Bali. The objectives of the study were to identify the potency of several local renewable energy resources, to analyze the financial feasibility of the use of the renewable energy, and to analyze the environmental impact of the renewable energy use in the small islands. Data analysis methods for energy in the small islands management were : the potency of renewable energy resources by descriptive method; financial feasibility by instruments of investment criteria (net present value, benefit cost ratio, and internal rate of return); and environmental impact by the change of environmental burden in decrease of diesel oil consumption and the emission of CO, NOx, SOx, and total particle. “RE-Nusa” model, the temporal dimension model of renewable energy management which was constructed by system dynamics approach, can predict the behaviour of the renewable energy management system in Nusa Penida. The system has a significant contribution on the electric production system during the period of May to August in every year. This results in a decrease of diesel power generation burden and diesel oil consumption in the island. It is therefore, the renewable energy management model, when is applied to the electrical system unit in Nusa Penida Island, will potentially reduce the emission of CO as 28.47%, NOx as 37.46%, SOx as 33.40%, and total particle as 30.582% for the next ten years.
Keyword: dynamic system, petrolium price policy, finansial feasibility, environmental inpact, Bali

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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