Judul: Penilaian Good Feeding dan Good Breeding Menggunakan Analytical Hierarchy Process pada Peternakan Sapi Perah Rakyat KPSBU Lembang
Abstrak: Sapi perah merupakan sapi yang dimanfaatkan untuk menghasilkan susu sebagai produk utama. Pengoptimalan produktivitas sapi perah dapat dilakukan dengan evaluasi Good Dairy Farming Practices (GDFP). Salah satu aspek GDFP adalah Good Feeding dan Good Breeding. Penelitian dilakukan dengan metode pengamatan secara langsung dan wawancara terhadap para peternak dan parah ahli. Analisis data dimulai dengan evaluasi Good Feeding dan Good Breeding, setelah itu pemeringkatan bobot prioritas untuk AHP, terakhir hasil evaluasi digabungkan dengan bobot AHP untuk mendapatkan nilai peforma gabungan. Hasil evaluasi Good Feeding dan Good Breeding secara berurutan adalah 3,52 (baik) dan 3,35 (cukup). Good Feeding merupakan faktor penentu paling penting dibandingkan dengan Good Breeding. Kriteria paling penting adalah kualitas konsentrat, sedangkan kriteria paling tidah penting adalah bangsa sapi yang dipelihara. Berdasarkan hasil penelitian ini perlu dilakukan lebih lanjut tentang pengembangan dengan kriteria prioritas tertinggi pada Good Feeding dan Good Breeding terhadap produktivitas sapi perah., Dairy cows are cows that are used to produce milk as the main product. Optimization of dairy cattle productivity can be done by evaluating Good Dairy Farming Practices (GDFP). This study aims to evaluate Good Feeding and Good Breeding and analyze the determinants that are most influential on the evaluation of Good Feeding and Good Breeding on dairy farms in KPSBU Lembang (case study: Manoko and Cisaroni). The research was conducted by direct observation method and interviews with breeders and severe experts. Data analysis begins with the evaluation of Good Feeding and Good Breeding, then the ranking of priority weights for AHP, finally the evaluation results are combined with AHP weights to obtain combined performance values. The evaluation results of Good Feeding and Good Breeding respectively are 3.52 (good) and 3,35 (sufficient). Good Feeding is the most important determining factor compared to Good Breeding. The most important criterion is the quality of concentration, while the last criterion is the nation of cattle raised. Based on the results of this study, it is necessary to do more about the vi development with the highest priority criteria on Good Feeding and Good Breeding on dairy cattle productivity.
Keyword: analytical hierarchy process, dairy cow, good feeding, good breeding

Judul: Animal Welfare dan Good Housing Menggunakan Analytical Hierarchy Process pada Peternakan Sapi Perah Rakyat KPSBU Lembang.
Abstrak: Peningkatan produksi susu sapi perah dapat diupayakan dengan Good Dairy Farming Practices (GDFP). Salah satu aspek penentu GDFP adalah Animal Welfare dan Good Housing. Penerapan Animal Welfare dan Good Housing yang baik dapat meningkatkan produktivitas sapi perah. Penelitian ini bertujuan mengevaluasi dan menganalisis kriteria penentu yang paling berpengaruh dalam GDFP aspek Animal Welfare dan Good Housing dengan menggunakan Analytical Hierarchy Process (AHP). Metode yang digunakan yaitu metode survei dan wawancara langsung kepada 10 peternak di Manoko dan 10 peternak di Cisaroni yang merupakan anggota Koperasi Peternak Sapi Perah Bandung Utara (KPSBU) serta 4 orang ahli yang terdiri dari akademisi, praktisi, dan pemerintah. Hasil penelitian menunjukkan aspek Animal Welfare lebih penting daripada Good Housing. Kriteria penentu tertinggi berdasarkan nilai gabungan pengamatan dan vektor prioritas dari Animal Welfare adalah bebas dari lapar dan haus sebesar 18,98% dengan bobot AHP 0,276, sedangkan dari Good Housing adalah peralatan susu 14,15% dengan bobot AHP 0,149., Increasing the milk production of dairy cows can be attempted with Good Dairy Farming Practices (GDFP). One of the defining aspects of GDFP is Animal Welfare and Good Housing. Good application of Animal Welfare and Good Housing can increase the productivity of dairy cows. This study aims to evaluate and analyze the most influential determining criteria in GDFP aspects of Animal Welfare and Good Housing by using the Analytical Hierarchy Process (AHP). The method used is a survey method and interviews with 10 farmers in Manoko and 10 farmers in Cisaroni who are members of the North Bandung Dairy Farmers Cooperative (KPSBU) and 4 experts consisting of academics, practitioner, and the government. The results of the research show that the Animal Welfare aspect is more important than Good Housing. The highest determining criterion based on the combined observation value and priority vectors from Animal Welfare is free from hunger and thirst 18,98% with an AHP weight of 0,276, while from Good Housing is milk equipment 14,15% with an AHP weight of 0,149.
Keyword: analytical hierarchy process, animal welfare, good dairy farming practices, good housing

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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