Judul: Analisis Peranan Koperasi Kabita Terhadap Usaha Tani Pembenihan Ikan Lele Sangkuriang
Abstrak: One of superiority from aquaculture that people interest is cat fish. Cat fish product be hanging on hatchery production. Based on data from breeding and aquaculture departements in bogor, the condition on hatchery cat fish in bogor still low. This condition will be influence about cat fish production. One of effort that farmer do to handle this problem is bulit an Kabita Cooperative. The research method make use of comparison analysts that comprise input comparison, income and R/C ratio. Product analysis show that avarage and variation on input of member farmer more lower and of one kind proportionate non member farmer. The member farmer get more higher income then non member farmer. Income of cash cost dan total cost famer member get amounting to Rp 24.830.384 and Rp 18.691.015. While income of cash cost dan total cost non famer member get amounting to Rp 7,837,226 to Rp 3,963,309. R / C ratio based on cash costs and the total cost is get by farmer members of 2,62 and 1,90. While the R / C ratio of the cash cost and the total cost get by non-member farmers of 1.55 and 1.24. Better operating conditions shows that the role be given Kabita Cooperative learning / training to farmer members
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Judul: Analisis Pendapatan USahatani Pembenihan Lele Dumbo dan Sangkuriang di Desa babakan Kecamatan Ciseeng Bogor
Abstrak: Fishery is one of the sectors that can improve indonesian welfare. Evident from the value of Gross Domestic Product increased by 21.55% per year from 2004 until 2012. The fisheries sector is classified into two categories namely fisheries and aquaculture. Catfish is one of the prime comodities of aquaculture. Babakan, is one of the catfish seed production centers in Bogor. There are two varieties of seed that developed in Babakan, Dumbo in UPR Jumbo Lestari and Sangkuriang in Kubang Sejahtera. The development of hatchery technology that marries the second and sixth derivative of Dumbo’s catfish and expectation to be able to produce more products led to the emergence of new varieties namely sangkuriang. The analysis used R / C ratio and chi-square. The results showed that the average income per hectare dumbo are greater than sangkuriang with a value of the R / C ratio reached 1.40 for Dumbo and sangkuriang only at 1.16. Meanwhile, from the results of different test chi square analysis, X2 value calculated for the cash cost of 36,5325 and 35.0972 for a total cost greater than the X2 table at 23.685.
Keyword: R/C ratio dan Chi Square, Income, Sangkuriang’s catfish hatchery, Dumbo’s catfish hatchery

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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