Judul: Pemanfaatan Limbah Udang Sebagai Salah Satu Komponen Ransum Domba Lokal Jantan dan Pengaruhnya Terhadap Kecernaan Lemak, Energi, dan Retensi Nitrogen
Abstrak: Shrimp waste from shrimp industry, composed of head, shell, and a little bit of flesh which is about 30-40% of the shrimp’s weight. Shrimp waste contain 14-19% crude fiber with 12.24% khitin. The aim of this experiment was to examine the level of shrimp waste on nutrient digestibility in ram. Completely Randomize Design with 4 treatments and 4 replications used in this experiment. The treatments were P0 (soybean meal 13.5% + Shrimp waste 0%), P1 (soybean meal 9% + Shrimp waste 10%), P2 (soybean meal 4.5% + Shrimp waste 20%) and P3 (soybean meal 0% + Shrimp waste 30%). The variables measured were ram performance ie. average daily weight gain, feed consumption, feed convertion, lipid digestibility, energy digestibility and nitrogen retention. Data were analyzed using analysis of variance (ANOVA) and the significant result would be continually examined using Duncan Multiple Range Test. The result showed that treatments significantly affected daily weight gain, feed convertion, lipid and energy digestibility. The average of daily weight gain as well as lipid digestibility of P3 was significantly (P<0.05) lower than the other treatments. There were no significant differences between treatments PO, P1, and P2. There were also no significant differencces among treatments on nitrogen retention.
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Judul: Peranan sumber karbon eksternal yang berbeda dalam pembentukan bioflok dan pengaruhnya terhadap kualitas air serta produksi pada sistem budidaya udang vaname Litopenaeus vannamei
Abstrak: Total ammonia nitrogen (TAN) is one issue on White shrimp cultivation. To reduce the TAN levels in order to remain within the limits specified in the cultivation process, the addition of organic carbon sources to improve the C / N ratio which aims to encourage the growth of heterotrophic bacteria. The study consisted of two phases. Phase one aims to determine the decrease in the concentration of TAN. This study uses a completely randomized design with four treatments and four reaply such as the addition of a carbon source (A) molasses; (B) tapioca; (C) rice bran; (D) the use of cassava by product with C/N ratio of 10, 15 and 20. Parameters is observed as a decrease in the concentration of TAN and DO, pH and temperature. Data were statistically analyzed by one-way analysis of variance (ANOVA) using Minitab software (version 16.0) at the 95% confidence interval (P <0,05).The measurements of TAN with different C/N ratios giving different values where the C/N ratio of 20 has effect not significantly different from C/N ratio of 15, but has a significantly different effect with the C/N ratio of 10 in all treatments of carbon sources after 24 hours. Phase two study aimed to determine the effect of carbon sources on bioflocs profile, water quality parameters and growth performance of White shrimp. The study consisted of 4 treatments such as the addition of a carbon source (A) molasses; (B) tapioca; (C) rice bran; (D) cassava by product and without carbon, use of C/N ratio of 15 and four reaply. Parameter of water quality are TAN, nitrite, nitrate and ammonia. Bioflocs profile observed is identification of bacteria, Vibrio bacterial counts and the total number of bacteria in the water and shrimp intestine. Production parameters observed is specific growth rate, feed conversion, survival rates and average weights of White shrimp. Water quality parameters, especially TAN, nitrite and ammonia decreased at the end of maintenance period. Results of profile bioflocs found some microorganisms such as worms, phytoplankton and zooplankton. Genus Bacillus sp. was found in all treatments of carbon sources. Highest total number of bacteria present in molasses treatment (water and intestinal shrimp). Vibrio bacteria counts are highest in the no-carbon treatment (water and shrimp intestine). Vibrio bacteria counts are highest in the no-carbon treatment (Water and shrimp intestine). Feed conversion on treatment without carbon carbon (1.67 ± 0.10) were significantly different with the treatment of tapioca (1.41 ± 0.13). White shrimp survival rate during the maintenance treatment without carbon (84.17 ± 3.20%) was lower in all treatments and were significantly different with cassava by product treatment (92.50% ± 5.00).
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Judul: Formulasi Algoritme Operasi Grup Jacobian Kurva Hyperelliptic ...
Abstrak: Dalam geometri aljabar, kurva hyperelliptic merupakan bentuk umum dari kurva elliptic. Kurva ini apabila dikenakan pada suatu lapangan berhingga akan membentuk suatu grup siklik. Pada kriptografi, khususnya enkripsi kunci publik, grup siklik yang dibangkitkan oleh kurva elliptic sudah banyak diteliti. Bahkan untuk kurva ini sudah memiliki standar oleh National Institute of Standard and Technology (NIST) Amerika. Sedangkan, untuk grup yang dibangkitkan oleh kurva hyperelliptic masih memiliki kekurangan dalam hal komputasinya. Tujuan dari penelitian ini adalah mengkonstruksi suatu lapangan berhingga pada , memilih kurva hyperelliptic atas lapangan hingga yang memenuhi kriteria keamanan untuk kriptografi, dan membuat formulasi operasi grup kurva hyperelliptic menggunakan algoritme Cantor. Dalam merekonstruksi lapangan hingga, terlebih dahulu tentukan dimensi dari lapangan hingga tersebut dan polinomial tak-teruraikan. Kemudian dipilih kurva hyperelliptic atas lapangan tersebut. Pada penelitian ini, kurva yang dipilih adalah = + + dengan lapangan hingga . Berdasarkan kurva yang dipilih, akan dibentuk suatu operasi grup dengan menggunakan algoritme Cantor, sehingga menjadi lebih aritmatik. Eksplorasi kurva hiperelliptic dilakukan untuk mengetahui keamanan dari kurva yang dipilih. Dengan menyusun algoritme operasi grup dari kurva yang dipilih, diperoleh perhitungan yang lebih aritmatik dan dapat diimplementasikan pada kriptografi kunci publik. Dari segi keamanan kurva telah memenuhi standar sehingga tahan terhadap serangan-serangan seperti Poligh-Hellman, Polard- , ataupun Frey-Ruck secara teorema.
Keyword: algoritme Cantor, kriptografi, kunci publik, kurva hyperelliptic, operasi grup