Judul: Produktivitas Hasil Persilangan Ayam Kedu dengan Ayam Silangan Sentul Kampung dan Resiprokalnya Umur 0 sampai 12 Minggu.
Abstrak: Local chickens is Indonesian native birds that potential to be developed as commercial chicken. However local chicken has not been maintaned optimally because it has low egg production and slow growth. Therefore, local chicken’s performance need to be improved by reciprocal crossing. This study aimed to evaluate the performance productivity of crossbreed between kedu roosters with sentul-kampung hens and sentul-kampung roosters with kedu hens. The performance of 39 keduSK day old chicks (DOC) and 28 SKkedu day old chicks (DOC) were recorded at 0 until 12 weeks. Measurement were body weight, body weight gain, feed intake, feed conversion ratio and mortality. Based on t test, the result of all variables were not significantly (P> 0.05). However, the present result showed that the KeduSK chicken had heavier body weight and body weight gain than the SKkedu chicken . The feed conversion ratio and mortality of keduSK chicken was better than SKkedu chicken. Feed intake of SKkedu chicken was less than keduSK chicken. Overall, performance of both chickens were same.
Keyword: crossing, kedu chicken, productivity, sentul-kampung chicken

Judul: Pertumbuhan Hasil Persilangan Ayam SKkedu dengan KeduSK dan Resiprokalnya Umur 0 sampai 12 Minggu.
Abstrak: Peningkatan genetik untuk pertumbuhan cepat pada ayam lokal Indonesia perlu dilakukan melalui persilangan resiprokal antar rumpun ayam seperti ayam kampung, sentul, dan kedu untuk mendapatkan tingkat heterosis yang tinggi. Penelitian ini bertujuan untuk mengkaji performa persilangan ayam sentulkampung- kedu (SKkedu) dengan ayam persilangan kedu-sentul-kampung (keduSK) dan resiprokalnya umur 0-12 minggu. Jumlah ayam yang diamati pada penelitian ini adalah 50 ekor SKkeduxkeduSK dan 55 ekor keduSKxSKkedu. Pemberian pakan dilakukan 4 fase dengan perbandingan pakan komersial dan dedak yaitu 100% pakan komersial untuk ayam umur 0-3 minggu, 80:20 untuk ayam umur 3-4 minggu, 70:30 untuk ayam umur 4-5 minggu, dan 60:40 untuk ayam umur 5-12 minggu. Rancangan acak kelompok (RAK) digunakan untuk menganalisis data penelitian per minggu dengan perlakuan 2 jenis ayam dan ulangan sebagai kelompok sebanyak 10. Peubah yang diamati adalah bobot badan, pertambahan bobot badan, konsumsi pakan, konversi pakan, dan mortalitas. Hasil pengamatan menunjukkan semua peubah tidak berbeda nyata. Persentase mortalitas ayam persilangan SKkeduxkeduSK adalah sebesar 22% dan 25.46% pada ayam persilangan keduSKxSKkedu. Pertumbuhan hasil persilangan ayam SKkedu dan keduSK dan resiprokalnya adalah sama.
Keyword: ayam keduSK, ayam SKkedu, persilangan, pertumbuhan

Judul: Separation of Isotropic and Anisotropic Tensor for MAPbI3 Perovskite Crystal Using Group Theory and Simplified Bond Hyperpolarizability Model.
Abstrak: Nonlinear phenomena occur when the electric field from a coherent and high-intensity light source interacts with the atoms in the material so that it oscillates anharmonically along the bond. Optical nonlinearities can be used as a method for analyzing the structure of optoelectronic materials such as perovskite. MAPbI3 is an optoelectronic material that has advantage in conservation efficiency, at room temperature MAPbI3 has an orthorhombic structure with C2v group points on the surface and D4h in the bulk perovskite section. This research separates the isotropic and anisotropic susceptibility tensors in the case of the second harmonic generation and the third harmonic generation and analyzes their contribution to total polarization. there are 6 isotropic non-zero tensor components and 13 non-zero anisotropic components in the C2V rank-3 structure and zero isotropic and anisotropic components in the D4h rank-3 structure. whereas there are 21 isotropic non-zero components at rank-4 of both structures and 20 and 8 non-zero anisotropic components at rank-4 surface and bulk perovskite. the contribution of 2nd order total polarization only occurs in anisotropic while for 3rd order, polarization isotropic and anisotropic contributing to total polarization
Keyword: Anisotropi, Isotropic