Judul: Performa F1 antara Ayam Sentul X Kampung dan Ayam Pelung X Sentul pada Umur 0-12 Minggu
Abstrak: The experiment aimed to observe growth performance of 3 native chicken crossed. The materials used in this experiment were 22 day old chick (DOC) resulted of natural mating between male pelung and female sentul chicken (PS) and 113 DOC resulted of natural mating between male sentul and female kampung chicken (SK). Feeds were given during experiment divided into 3 phases that were BR-21E 100% for chicken between 0-3 weeks of age, rice bran 20% and BR-21E 80% for 4 week age, and grower feeds rice bran 40% and BR-21E 60% for chicken between 5-12 weeks. Variables which recorded weekly were body weight until 12 weeks of age, weight gain, feed consumption, feed conversion, and mortality. The t-test was used to compare data of performance between two sexes and between two cross system (PS and SK). The results showed that body weight at 12 weeks of crossbred (PS) male was significantly higher than SK (P<0.01) also female (P>0.05). Feed consumption and feed conversion were not significantly different (P>0.05). The mortality rate during the experiment were 4.54% for crossbred PS and 7.07% for SK. SK and PS can be applied to increase meat production.
Keyword: performance, sentul chicken, pelung chicken, kampung chicken

Judul: Performa Produksi F1 antara Ayam Ras Pedaging × Kampung dan Kampung × Ras Pedaging pada Umur 0-12 Minggu
Abstrak: Kampung chicken is Indonesian native chicken that potential to be developed as commercial chicken. The large-scale breeders less interest to breed kampung chicken because it has slow growth to reach slaughter weight than commercial meat type. Therefore, kampung chicken’s performance need to be improved by crossing with commercial meat type that has fast growth. This research purposed to observed the effect performance of first generation (F1) from kampung chicken crossing with commercial meat type (KB) and their reciprocal (BK). Research conducted performance of crossing chicken in age 0-12 weeks age. T test used for knowing difference body weight mean, body weight gain, feed consumption, and feed convertion rate. The result of this research were not significant between KB cock with BK cock and KB hen with BK hen on body weight, body weight gain, feed consumption, and feed convertion rate. Whereas mortality percentage BK chicken was higher than KB chicken althought less of mortality. KB and BK cocks had better performance than hens. Reciprocal crossing between kampung chicken and commercial meat type had performance better than kampung chicken, so crossing had been increased genetic quality of kampung chicken.
Keyword: KB chicken., growth performance, crossing, BK chicken

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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