Judul: Penerapan biosekuriti dan higiene di tempat penjualan daging ayam di Jakarta Barat
Abstrak: This study is aimed to observe the application of biosecurity and hygiene in the poultry meat marketplace (PMM) in West Jakarta assessed by using checklist which was developed from audit checklist of veterinary establishment number (Nomor Kontrol Veteriner/NKV). The audit has been conducted with observation method in PMM which are resgitered in the district office for livestock and fisheries in West Jakarta. The study involved 104 PMMs which consisted of 91 PMMs in traditional markets at 8 subdistricts and 13 supermarkets which were selected from each subdistrict (excluding Tambora). The elements of biosecurity and hygiene which were assessed included location, building and facilities, hygiene of carcass handling, equipments, building and equipments sanitation, personal hygiene, waste disposal management and environmental sanitation. The results showed that the biosecurity and hygiene practices of PMMs in supermarket in West Jakarta were categorized as good (23.1%) and moderate (76.9%). Meanwhile, the biosecurity and hygiene practices of PMMs in the traditional market were categorized as moderate (18.7%) and poor (81.3%). This condition should be highly considered related to food safety and environmental health.
Keyword: Biosecurity, Hygiene, The poultry meat marketplace

Judul: Penerapan Biosekuriti Dan Higiene  Di Rumah Pemotongan Unggas Skala Kecil  Di Jakarta Barat
Abstrak: Penelitian ini bertujuan menghasilkan gambaran penerapan biosekuriti dan higiene di rumah pemotongan unggas skala kecil (RPU-SK) di Jakarta Barat yang dinilai dengan pengamatan dan checklist yang didasari penilaian Nomor Kontrol Veteriner (NKV). Penelitian dilakukan dengan metode observasi lapang. Besaran sampel sebanyak 61 RPU-SK dari 8 kecamatan. Yang semuanya merupakan RPU-SK yang terdaftar di Suku Dinas Peternakan dan Perikanan Jakarta Barat. Komponen biosekuriti dan higiene RPU-SK yang dinilai meliputi lokasi dan lingkungan, bangunan utama, fasilitas, bahan baku, penanganan dan pengolahan, higiene personal, dan sanitasi. Hasil pengamatan menunjukkan bahwa praktek biosekuriti dan higiene pada RPU-SK di Jakarta Barat sebagian besar belum menerapkan biosekuriti dan higiene dengan baik (98.3% berkategori buruk dan 1.63% berkategori sedang). Penyimpangan kritis yang paling banyak ditemukan adalah peralatan tidak terbuat dari bahan anti karat, tidak mudah dibersihkan dan didisinfeksi (41.0%). Penyimpangan serius yang paling banyak ditemukan adalah tidak tersedia fasilitas pencucian tangan yang dilengkapi sabun (100%), tidak dilakukan pemeriksaan antemortem pada unggas yang akan dipotong (100%), tidak dilakukan pemeriksaan postmortem pada setiap unggas yang dipotong (100%), dan tidak dilakukan pendinginan terhadap karkas (100%). Penyimpangan mayor yang paling banyak ditemukan adalah tidak terdapat fasilitas pengolahan limbah (100%), ruangan bersih dan kotor tidak terpisah (100%). Penyimpangan minor yang paling banyak ditemukan adalah karyawan tidak mengenakan alat pelindung diri seperti sepatu bot, masker, dan sarung tangan (100%). Hampir semua RPU-SK di Jakarta Barat yang dinilai berkategori buruk (98.4%), hanya satu RPU-SK yang berkategori sedang (1.6%). Kondisi biosekuriti dan higiene yang belum baik ini perlu mendapat perhatian, mengingat RPU merupakan salah satu titik kritis keamanan pangan dan kesehatan masyarakat dalam mata rantai penyediaan daging unggas. Kata kunci: biosekuriti, higiene, rumah pemotongan unggas skala kecil.
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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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