Judul: Produksi Pendederan Ikan Ctenopoma Ctenopoma Acutirostre Pada Padat Tebar Berbeda Dengan Pergantian Air 45%/Hari
Abstrak: Ikan ctenopoma merupakan salah satu komoditas ekspor, yang produksinya masih tergolong rendah. Penelitian ini bertujuan meningkatkan produktivitas melalui peningkatan padat penebaran. Ikan ctenopoma berukuran 2.35±0.12 cm dipelihara dalam akuarium dengan kepadatan 2, 4, 6 dan 8 ekor/liter dengan pergantian air 45%. Selama pemeliharaan ikan diberi pakan cacing sutera tiga kali sehari secara at satiation dan kualitas air dikelola melalui penyifonan dan pergantian air pada sore hari. Hasil penelitian menunjukan bahwa peningkatan padat penebaran tidak mempengaruhi tingkat kelangsungan hidup dan keragaman ikan pada akhir pemeliharaan, namun laju pertumbuhan spesifik, pertumbuhan panjang mutlak dan efisiensi pakan semakin menurun seiring dengan meningkatnya padat penebaran. Berdasarkan analisa usaha padat penebaran terbaik dalam produksi ikan ctenopoma adalah 8 ekor/liter.
Keyword: ikan ctenopoma, padat penebaran dan pergantian air

Judul: Produksi Pendederan Ikan Ctenopoma Ctenopoma acutirostre Pada Padat Tebar Berbeda Dan Pergantian Air 30%.
Abstrak: This study aimed to determine the optimal stocking density on fish nursery ctenopoma at size of 2 cm and 30% water changes every day. The treatment in the study was 4 levels of fish stocking densities, ie 2, 4, 6 and 8 fish/liter and quality of the culture media was maintained by replacing the water as much as 30%. Fish reared in 12 aquariums filled with 10.5 liters of fresh water respectivelly and as long 40 days period. The average length of fish seed used was 2.18±0.18 cm. During the rearing, the fish fed with tubificid worm in the morning, noon and night. The results showed that the difference of the treatment did not affect the survival and the coefficient of variance, however increasing the stocking density flollowed by lowering the growth rate, and the feed efficiency. Considering economic value, the highest rearing productivity was achieved by stocking density of 6 fish/liter.
Keyword: Ctenopoma, Production, Stocking density, Water exchange

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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