Judul: Aspek Reproduksi Ikan Tembang (Sardinella fimbriata Cuvier dan Valenciennes 1847) di Perairan Teluk Banten.
Abstrak: Fringescale sardinella (Sardinella fimbriata) has an important economic value and high levels of utilization. Indicated the availability of S. fimbriata decline in reproduction studies Karangantu so necessary for further management. The research was conducted in May-August 2012. Based on this research, it is known reproductive pattern S. fimbriata from Banten Bay. Total number of fish taken during the study were 765 individuals. Results showed that the sex ratio of male and female Fringescale sardinella unbalanced (0,7:1) with Chi-square test. Condition factor S. fimbriata ranged from 0,9248 to 5,8707. Fringescale sardinella female mature more rapidly than male fish gonads with mature gonads were first size of 179,4 mm (female) and 192,4 mm (male). Peak spawning season of Fringescale sardinella in Banten Bay waters allegedly occurred in May and late August. Reproductive potential of S. fimbriata high at 9 691-173 335 eggs. Egg diameter of S. fimbriata ranged from 0,0250 to 0,6250 mm with the spread mode from two types of spawning peaks with partial (partial spawner).
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Judul: Biologi Reproduksi Ikan Tembang (Sardinella fimbriata Valenciennes, 1847) di Perairan Selat Sunda, Banten
Abstrak: Ikan tembang (Sardinella fimbriata) adalah ikan pelagis kecil yang bernilai ekonomis tinggi. Tingginya permintaan ikan ini diperkirakan dapat menurunkan ketersediaannya di alam. Tujuan penelitian ini adalah untuk menganalisis biologi reproduksi ikan tembang. Penelitian dilakukan pada bulan Mei hingga Oktober 2018. Ukuran contoh yang diperoleh selama penelitian berjumlah 629 ekor, terdiri atas 265 ekor ikan jantan dan 364 ekor ikan betina. Proporsi kelamin ikan jantan dan ikan betina tidak seimbang (1:1,4). Pertumbuhannya adalah allometrik negatif. Faktor kondisi ikan tembang betina lebih tinggi dibandingkan ikan jantan. Puncak musim pemijahan terjadi pada bulan Agustus dan September. Fekunditas berkisar antara 4118-9767 butir. Pola sebaran diameter menunjukkan bahwa ikan tembang memijah secara total (total spawner).
Keyword: ikan tembang, pemijahan, pertumbuhan, reproduksi, Selat Sunda

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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