Judul: Subsitusi Konsentrat Komersil dengan Tepung Indigofera (Indigofera sp.) untuk Konsumsi Pakan, Kecernaan dan Produksi Susu Sapi Friesian Holstein (FH)
Abstrak: South Bandung district is one of the largest milk-producing areas in West Java. Sub-district Pasirjambu is a part of Bandung Selatan regency that have big potential in dairy cattle breeding. The problem in this area is low production of milk produced by farmers and the high price of the commercial feed concentrates, so it influences market value for milk and welfare farmers. Indigofera sp. mesh in this research was used as commercial concentrates substitution. This research using randomized design group (RAK method – ANOVA) on 3 group based on milk production. Nine Friesian Holstein (FH) cows with random treatment. The treatment P0 (100% concentrates : 0% Indigofera sp.), P1 (80% concentrates : 20% Indigofera sp.), and P2 (60% concentrates : 40% Indigofera sp.). The results showed that substitution of Indigofera sp. mesh can substitute concentrate to 40% as a commercial concentrate substitution does not affect milk feed intake, digestibility and milk production.
Keyword: milk production., Indigofera sp, feed intake, digestibility, commercial concenstrat

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: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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