Judul: Efek Pemberian Tepung Indigofera (Indigofera sp.) Sebagai Substitusi Konsentrat Komersial terhadap Produksi dan Kualitas Susu Sapi FH
Abstrak: This research aimed to evaluate the use of Indigofera (Indigofera sp.) meal as substitute of commercial concentrate on the quantity and quality of milk of Friesien Holstein cows at Pasirjambu districts. This research used a randomized block design and analysis of Covariance (RBD - ANCOVA), in 3 levels of concentrates and Indigofera meal with 3 replications as a block based on milk production levels. Nine of dairy cows were used and offered treatments randomly. The treatments were R0 (60% forage + 40% concentrate), R1 (60% forage + 32% concentrate + 8% Indigofera meal) dan R2 (60% forage + 24% concentrate + 16% Indigofera meal). The results showed that there was no significant different on protein, fat, SNF, lactose, density, salt and freezing point of milk among treatment. This means Indigofera meal added as substitute of commercial concentrate did not negative affect milk quantity and quality. Thus, indigofera can be used as substitute to commercial concentrate up to 16%.
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Judul: Efek Pemberian Hijauan Fermentasi (Hi-fer+) dan Konsentrat Standar terhadap Produksi dan Kualitas Susu Sapi Perah Friesian Holstein
Abstrak: Hijauan fermentasi (Hi-fer+) adalah contoh penyediaan hijauan yang difermentasi menggunakan komplemen pakan (KP) dan molasses. Penelitian ini bertujuan untuk menguji pengaruh pemberian Hi-fer+ dan konsentrat standar (PK 17.10%; TDN 71.05%) terhadap produksi dan kualitas susu sapi perah. Rancangan acak kelompok digunakan dalam penelitian ini (3 perlakuan; 4 ulangan); perlakuan terdiri atas: P0=hijauan peternak (rumput gajah/jerami padi) + konsentrat lokal, P1=hijauan peternak (rumput gajah/jerami padi) + konsentrat standar, P2=hijauan fermentasi (Hi-fer+) + konsentrat standar. Data dianalisis dengan sidik ragam (ANOVA) dan uji ortogonal kontras. Perlakuan tidak mempengaruhi produksi dan kualitas susu (lemak, protein, laktosa, SNF, total solid dan densitas), pertambahan bobot badan, efisiensi penggunaan pakan dan persistensi laktasi. Pemberian Hi-fer+ dan konsentrat standar mampu meningkatkan kadar lemak susu sebesar 36.5%, mempengaruhi body condition score (BCS) (P<0.05), memperbaiki total plate count (TPC), meningkatkan konsumsi bahan segar hijauan dan memberikan income over feed cost yang lebih besar bagi peternak.
Keyword: Hi-fer+, konsentrat standar, kualitas susu, produksi susu

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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