Judul: Performa Produksi dan Reproduksi PersilanganAyamSentul dengan Kampung serta Pelung dengan Sentul.
Abstrak: Demand of chicken meat and eggs can be completed from local chicken. From the genetic aspect, Indonesian local chicken has large genetic diversity between strains. Crossing is one way to improve the production performance. Crosses were performed in this study is between male sentul chicken with female kampung chicken (SK) and male pelung chicken with female sentul chicken (PS). This study observed on hen day, egg weight, egg shape, fertility, hatchability, DOC weight (day old chiks), eggshell thickness, and mortality of embrio. Comparison test calculated based on T-test. The results showed difference in succession SK and PS for fertility (75.36±11.82% and 65.36±27.66%), hatchability (29.13±15.45% and 28.53±22.57%), mortality of embrio (71.12±15.69% and 71.47±22.57%), hen day (42.16±13.97% and 51.75±17.25%), egg shape (0.764±0.041 and 0.759±0.053). Egg weight of SK (44.15±4.37 g) lighter than PS (4.84±3.59 g) and DOC weight of SK (28.22±3.39 g) lighter than PS (30.09±3.16 g). According to biological sentul chicken in intersection of PS had higher egg production than kampung chicken in intersection SK. PS had a better performance than SK because with the similarity of shell tickness, hatchability and embrio mortality PS had higher hatching weight than SK.
Keyword: local chicken., hen day, hatcabillity, fertility, DOC weight

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: 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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