Judul: Keragaan Hibrida Hasil Persilangan Intraspesifik Empat Populasi Ikan Nila Oreochromis niloticus Di Karamba Jaring Apung, Danau Lido, Bogor
Abstrak: Objectives of the study was to understand the performance of four strains (Red NIFI, Nirwana, Merah Lido, and BEST) nile tilapine hybrids based on the number of larvae produced, survival and growth rate, heterosis, morphometric character, and color inheritance aspect. Fry of 25 days old were reared in fine floating net cages sized 2x2x1 m for 8 weeks (56 days) with density of 50 fry per m3. Feed was given three times a day at 10% of total biomass. The results showed that the average production of larvae had the highest number from the hybrids or female Nirwana crossed with different male from other strains. For growth rate, hybrids showed better performance than the parent one (p<0,05), the best growth rate was between male Red NIFI x female BEST (6,44±0,07%). Survival rate had the best performance on male Merah lido x female BEST (77,00±2,78%). The best heterosis value was found 5,82% for spesific growth rate on the hybrids of male Nirwana x female BEST. Phenotypic similarity indicated that Red NIFI was separate a part from the others. Crossing between light (red color) and dark (black) background showed that light color gene was dominance over dark color one.
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Judul: Karakteristik genotipe hibrida hasil persilangan 3 strain ikan nila Oreochromis niloticus dengan metode Random Amplified Polymorphic DNA (RAPD)
Abstrak: Objectives of this study were to observe the genetic variability and relationship among hybrids of three strains (BEST, Nirwana, and Red NIFI) using Random Amplified Polymorphic DNA (RAPD). The results showed that hybridization enabled to increase genetic variability respectedly on progeny between male Nirwana with female BEST (27.93%) as well as between male Nirwana with female Red NIFI (27.23%). Based on relationship analysis there were indication that Nirwana and Red NIFI were closer to the hybrid groups, compared to BEST one. The greatest genetic distance was the hybrids of Nirwana x BEST (0.6).
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Judul: Analisis dan Implementasi Certificate Authorities (CA) pada Public Switched Telephone Network (PSTN)
Abstrak: Secure Telephone Protocol has ability to authenticate involved party and keep the secrecy of the message sent over the protocol. The secrecy of the message archieved by using symmetric key cryptographic scheme, and authentication archieved using public key cryptographic scheme. One of several party involved in the protocol and hold an important function called Certificate Authorities or CA. CA responsible for generating public key pair for other party involved in the protocol. When CA generates public key pair, several primitive cryptographic scheme used for guarantee the security of the key. Two of them are hash function SHA-1 and El-Gamal public key scheme embedded in Digital Signature Algorithm scheme. The prototype implementing the scheme above developed using Java programming language with JCE addition from Bauncy Castle. The analysis towards implemented prototype indicates that the prototype still has some flaws to be implemented in real world.
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