Judul: IPB (Bogor Agricultural University)
Abstrak: Penelitian bertujuan untuk mengetahui berapa besar peran vaksinasi Newcastle disease (ND) dalam mencegah kematian ayam buras, sehingga dapat meningkatkan populasi dan sekaligus produksinya. Selain itu penelitian juga bertujuan untuk mengetahui gambaran pasti dan dampak positif yang bisa diperoleh masyarakat yang memelihara ayam buras, khususnya para petani ternak yang berada di pedesaan, serta peranannya terhadap pembangunan peternakan secara nasional.
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Judul: Perkembangan Proteksi ND Dan Populasi Ayam Buras Proyek Iptekda V Lipi Di Desa Sumber Rejo Kecamatan Rajabasa Lampung Selatan
Abstrak: Penelitian ini mengikuti proyek IPTEKDA V LIPI di Politektik Pertanian Lampung selama bulan September 2002 sampai dengan Februari 2003. Penelitian ini dilakukan untuk mengetahui keberhasilan vaksinasi ND dilihat dari titer antibodi dan perubahan popuJasi ayam buras Proyek IPTEKDA V LIPI dan mengetahui karakteristik petemak di Desa Sumber Rejo Kecamatan Rajabasa, Lampung Selatan. Metode yang digunakan adalah pelaksanaan vaksinasi ND. Hemaglutination Inhibition (HI) test, monitoring populasi ayam buras dan penyebaran kuesioner. Data diolah kualitatif secara deskciptif dengan tabuJasi berdasarkan basil perhitungan rata-rata HI dengan GMT (Geometric Mean Titre). hasil monitoring populasi dan hasil kuesioner. Hasil yang diperoleh adalah vaksinasi ND oleh proyek IPTEKDA V LlPI di Desa Sumber Rejo yaitH GMT 1=64, GMT 11=84,44 dan GMT 111=47,7 dapat disimpulkan bahwa vaksinasi berhasil menimbulkan zat kebal terhadap ND dengan GMT > 32. Perubahan populasi selama pengamatan menunjukkan penurunan dengan rata-rata perbulan 3,56% disebabkan angka penjualan (84,78%) dan "kematian" (15,12%). Petemak ayam buras di Desa Sumber Rejo pada umumnya latar pendidikannya masih rendah dan mereka meme1ihara ayam buras hanya sebagai pekerjaan sambi Ian. Penghasilan petemak perbulan (68%) kurang dari Rp. 300.000,00 sehingga disimpulkan tingkat perekonomian masyarakat masih rendah. Sebanyak 70,8% petemak mengetahui ten tang ND, tetapi hanya 42,3% Petemak yaitu peserta proyek yang ayamnya divaksinasi dan sisanya 57,7% petemak belum mengetahui cara pencegahan ND. The study was located at IPTEKDA V LIPI project during September 2002-February 2003. The objective of this study is to evaluate ND (Newcastle Disease) vaccination result based on antibody titre and the change of native chicken population and figure out the chicken farmers characteristic in Sumber Rejo Vii/age, Rajabasa District of South Lampung. The method consists of Haemaglutination Inhibition (HI) test, monitoring of native chicken population number and questionnaire . The result showed that GMT (Geometric Mean Titre) measuredfrom rl, 2nd and 3rd vaccination indicated the titre higher than GMI' 32, which means the vaccinated population was protected against ND. The population is decreased by 3,56% per month due to harvesting for reimbursement of credit 84,78% and "mortality" 15,12%. Chickenfarming is only side job offarmers. About 70,3% of chicken farmers know about ND occurrence but only 42,3% of them did vaccination, the others 57, 7% of them do not aware of ND prevention.
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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