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 Tata Niaga Usaha Pembenihan Ikan Lele Sangkuriang Pada Unit Pembenihan Rakyat Bina Tular Desa Gadog Kabupaten Bogor.
Abstrak: Sangkuriang catfish is one of aquaculture commodity which is widely cultivated in Bogor. Its production was the highest in West Jawa region. The fish has a physical characteristic of smooth body, long body, not scaly like an ordinary fish, and fused with the caudal fin. UPR Bina Tular or commonly called the People's Hatchery Units established by few farmers. At first UPR Tular is a farmer group in hatchery, but in 2007 UPR Bina Tular changed into individual businesses owned by Mr.Endang. The difference in price at the farm level and the consumer make the analysis needed to be conducted. The anlysis methods used are marketing function, marketing institution, market structure, profit and cost ratio, farmer’s share and market conduct. The results show that an efficent trading system channels are channels I and II. Efficient trading system channel is a channel that has the smallest valueof the margin’s share and the biggest value of the largest farmers.
Keyword: Efficiency, UPR BINA TULAR, Trading system

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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