Judul: Performa Produksi Hasil Persilangan Ayam Pelung x Sentul x Kampung x Ras Pedaging Umur 12-21 Minggu
Abstrak: This research studied the performance of PSKB and PSBK chicken in growth phase (12-21 weeks). PSKB chicken was crossbred between pelung-sentul (PS) cock with kampung-meat type (KB) hen. PSBK chicken was crossbred between pelung-sentul (PS) cock with meat type-kampung (BK) hen. This research used 12 males PSKB, 23 females PSKB, 11 males PSBK, and 9 females PSBK. Variables measured were body weight, body weight gain, feed intake, feed conversion, mortality, age of first egg, weight of first egg, and indexs of egg. The result of this research were not significant (P>0.05) between PSKB cock with PSBK cock and PSKB hen with PSBK hen on body weight, body weight gain, feed intake, feed conversion, weight of first egg, and indexs of egg. Age of first egg were significantly different (P<0.05) between PSKB hen with PSBK hen. The males of PSKB and PSBK had better performance than the females. Crossbred of pelung, sentul, kampong, and meat type showed better performance than local chicken.
Keyword: crossbred, performance, PSBK chicken, PSKB chicken

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: 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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