Judul: Dampak Ekonomi Pencemaran Air Terhadap Perikanan Budidaya Sistem Keramba Jaring Apung (KJA) di Waduk Cirata, Kabupaten Bandung Barat
Abstrak: This research aims to analyze the economic impact of water pollution on aquaculture in Cirata Reservoir. Impact of water pollution in Cirata is declining fish productivity of floating cage aquaculture. Based on the data analysis there are 8 factors that could explain the presence of contamination in the last 5 years which has exceeded the threshold of category C (Pb, Zn, Cl2, H2S, DO, Cu, Cd, and Nitrite). Further multiple regression analysis of water quality impact on the productivity of floating cage. Showed that, only variable DO levels is statistically significant effect on productivity of floating cage. Value of economic loss is calculated based declining productivity amounting to Rp 985.485.382.718 in 2011. The results of the calculation of economic loss in the last 5 years amounting to Rp 4.219.702.954.280. There are five policys identified which were restrictions on the amount of floating cage with progressive taxation, tax collection at each floating cage aquaculture for environmental improvement costs (Rp 10/kg crops), installation of waste filter, biological cleaners, and withdrawals floating cage which are not enviromental friendly (floating made of styrofoam) and unused. AHP analysis results that the first policy priority is the installation of waste filter policy.
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Judul: Rancang bangun model pengelolaan waduk berkelanjutan berbasis perikanan budidaya karamba jaring apung (kasus waduk Cirata Jawa Barat)
Abstrak: The research of the sustainable management model’s design of Reservoir Fisheries floating cage (Reservoir Case Cirata, West Java) aims to calculate the carrying capacity, make its institutional model, build dynamic system model and assess the sustainability of the reservoir management of floating cage based aquaculture in Cirata Reservoir. The calculation of the pollution load and capacity of assimilation is used to calculate its carrying capacity and Interpretative Structural Modeling (ISM) is used to create institutional. Furthermore, Powersim software is used to create dynamic models and Rapfish used to assess the status of sustainability in the management of Cirata Reservoir. This study shows the status of water quality in Cirata reservoir has been low into high polluted (based on water quality classification class B PP 82-year-2001), the carrying capacity of the reservoir parameters in Cirata based on TSS, BOD, COD, PO4, NO3, NO2, Fe, Cd, Zn, and Mn parameter have passed the threshold of the standard quality of water in the river. The ideal reservoir management involves the central government (Ministry of Forestry), Cirata Reservoir Management Agency, Department of Fisheries and Marine West Java Province and the Ministry of Fisheries and Marine. The population growth is the factor of problem in the utilization of Cirata Reservoir. The problem follows the basic pattern of boundary dynamic model for success, tragedy of the common and shifting of the burden, with the dominant building block is reinforcing. The increased activity of the population (KJA, industry, agriculture, livestock, forest encroachment) increased sedimentation and pollution balance the functions of ecological, economic and socio-cultural. Ecology aspect is the weakest aspect in the sustainable management of Cirata Reservoir. Socio-cultural aspect is the dominant aspect as a major capital in the intervention of four other aspects. (economic, legal-institutional, technology / infrastructure and ecology).
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Judul: The Exploration of Discrete Logarithm over Finite Field GF(3m)
Abstrak: The security of many public~key algorithms is based on the problem of finding discrete logarithms. The generalized discrete logarithm problem is the following: given a finite cyclic group G of order n, a generator a of G, and an element fl E G, find the integer x, 0 ~ x ~ n - 1, such that 0: = fl. Algorithm for discrete logarithm problem focused on Menezes et al. (1997) that consist of exhaustive search algorithm, the baby-step giant-step algorithm, Pollard's rho algorithm, Pohlig-Hellman algorithm, and index-calculus algorithm. These algorithms are explorated to be used in discrete logarithm problem over finite field GF(3m ). The exploration also produces some algorithms, i.e. naif negative algorithm, baby-step mother-step algorithm, baby-step mother free-step algorithm, and baby-step free-step algorithm. All algorithms implemented using Maple 11. The Pohlig-Hellman and baby-step giant-step algorithms are efficient enough to be used in discrete logarithm problem over finite field GF(3m ) for m < 20.
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