Judul: Evaluation of Animal Welfare Implementation at Jatinegara Bird Market, Special Capital Region of Jakarta
Abstrak: Kesejahteraan hewan adalah segala urusan yang berhubungan dengan keadaan fisik dan mental hewan menurut ukuran perilaku alami hewan yang perlu diterapkan dan ditegakkan untuk melindungi hewan dari perlakuan setiap orang yang tidak layak terhadap hewan. Penelitian ini bertujuan untuk memberikan gambaran mengenai penerapan kesejahtraan hewan terutama pada burung di Pasar Jatinegara dan untuk mengetahui korelasi antara karakteristik, pengetahuan, serta praktik pedagang burung mengenai aspek kesejahteraan hewan di Pasar Jatinegara. Penelitian ini dirancang menggunakan kajian lapang lintas seksional (crosssectional study). Data diperoleh dari wawancara kepada 30 responden menggunakan kuesioner yang disusun secara terstruktur. Hasil penelitian menunjukkan bahwa pengetahuan dan praktik pedagang burung tergolong sedang. Dalam peneitian ini didapatkan hubungan yang nyata antara pendidikan dan pengetahuan (p=0.009; r=0.469).
Keyword: Animal welfare, Bird, Knowledge, Practice, Natural behavior, Education, Knowledge, Animal welfare, Ukuran perilaku, Bird condition

Judul: Performance Bird Market in Bogor West Java
Abstrak: Keragaan pasar burung merupakan pencapaian usaha dalam menjalankan aktivitas perdagangan burung, sehingga penelitian ini digunakan untuk melihat seberapa ekonomisnya usaha perdagangan burung yang dilakukan. Penelitian dilakukan dengan mewawancarai pedagang dan pembeli burung menggunakan metode purposive dan accidental sampling. Pasar burung di Bogor menjual bermacam jenis burung, sangkar, pakan, aksesoris, alat perawatan, obat dan vitamin. Sebagian besar pedagang burung berlatar usaha karena hobi, lama usaha kurang dari 5 tahun, dan sebagai pedagang profesional. Pembeli burung rata-rata orang dewasa dan menyukai jenis burung tertentu untuk peliharaan rumah. Asal burung sebagian besar dari Pulau Jawa. Saluran pemasaran yaitu penangkap-penjual-pembeli, penangkar-penjual-pembeli, dan penangkap-agen-penjual-pembeli. Nilai ekonomi pasar burung sebanyak Rp453.394.000/bulan dengan keuntungan Rp114.935.000/bulan. Keragaan pasar burung di Bogor dilihat dari hasil perhitungan eff-X dan PCM menunjukkan hasil yang beragam. Hasil perhitungan efisiensi internal dan PCM merupakan indikator pedagang dalam meningkatkan margin pemasaran., The performance bird market is a business achievement in bird trading activities, so the research is used to see how economical the bird trading business is. The research was conducted by interviewing traders and buyers of bird using purposive and accidental sampling method. The bird market in Bogor sells various type of birds, cages, feeds, accessories, grooming tools, medicines, and vitamins. Most of the bird traders have a business background due to hobbies, business length less than 5 years, and as professional traders. The average of bird buyers are adults and they prefer to buy several species as a pet. The origin of bird is mostly from Java. The market channels are catcher-seller-buyer, captive-seller-buyer, and catcher-agent-seller-buyer. The economic value of the bird market is IDR 453.394.000/month with a profit of IDR 114.935.000/month. The performance bird market in Bogor which is counted from the calculation of the Eff-X (Internal Efficiency) and PCM (Price Cost Margin) shows mixed results. The result of the calculation of Eff-X and PCM are indicators of traders in increase marketing margin.
Keyword: bogor, keragaan, pasar burung, perdagangan burung, bogor, bird market, bird trade, performance

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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