Judul: Analisis Pendapatan Usahatani Padi System Of Rice Intensification (Sri) Dan Padi Konvensional Di Kecamatan Nagrak Kabupaten Sukabumi
Abstrak: SRI (System of Rice Intensification) merupakan teknologi budidaya yang diharapkan dapat meningkatkan produksi padi. Tujuan penelitian ini yaitu membandingkan keragaan usahatani, tingkat pendapatan, dan efisiensi antara usahatani padi SRI dan padi konvensional di Kecamatan Nagrak. Metode analisis yang digunakan adalah analisis pendapatan usahatani dan uji beda. Hasil penelitian menunjukkan nilai produktivitas usahatani padi SRI (5.91 ton per hektar) lebih besar dibandingkan usahatani padi konvensional (4.93 ton per hektar). Nilai pendapatan atas biaya total usahatani padi SRI (Rp 5 439 098 per hektar) lebih besar usahatani padi konvensional (Rp 1 891 923 per hektar). Sehingga dapat dinyatakan bahwa usahatani padi SRI lebih menguntungkan dibandingkan padi konvensional, serta usahatani padi SRI lebih efisien dibandingkan dengan padi konvensional dengan R/C rasio atas biaya total masing-masing sebesar 1.35 dan 1.12. Hasil uji beda menunjukkan adanya perbedaan nilai produktivitas, pendapatan atas biaya total, dan R/C rasio antara usahatani padi SRI dengan usahatani padi konvensional.
Keyword: padi konvensional, pendapatan usahatani, SRI

Judul: Analisis Pendapatan Usahatani Padi Metode System Of Rice Intensification (SRI) dan Padi Konvensional di Desa Kebonpedes, Sukabumi
Abstrak: System Of Rice Intensification known as SRI is a sustainable method of rice cultivation with organic treatment ever discovered in madagascar and continue to be developed in many countries one of which is Indonesia. The objectives of this research are to obtain rice cultivation method that can increase income and welfare of farmers and to identify the factors in determining how decisions in rice farming in village Kebonpedes,Sukabumi. Research carried out by comparing the SRI and conventional methods. SRI method showed that the amount of the costs needed for the production of rice per hectare in one growing season is Rp 9.854.311,34 for land lord and Rp 15.354.311,34 for the rent with dry grain harvest may reached at 7.531 Kg/Ha and a selling price Rp 3.400 per-kilogram. Conventional method showed that the amount of the costs needed for the production of rice per hectare in one growing season is Rp 9.808.711,14 for land vi lord and Rp 15.308.711,14 for the rent with dry grain harvest may reached at 5.448 Kg/Ha and a selling price Rp 3.000 per kilogram. Several factors that support conventional farmers at Kebonpedes village to didn’t move on are habit, type of farming, and land status.
Keyword: method, income, factors, farming, cost

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.
Keyword: