Judul: Tingkah laku ayam broiler di kandang tertutup dengan suhu dan warna cahaya berbeda
Abstrak: Daging ayam sebagai hasil utama industri peternakan ayam broiler diharapkan mampu memenuhi kebutuhan kuantitas dan kualitas protein bagi masyakat Indonesia. Keberhasilan budidaya dipengaruhi oleh aspek manajemen diantaranya suhu dan pencahayaan di dalam kandang. Suhu lingkungan tinggi dan fluktuatif di Indonesia merupakan kendala dalam keberhasilan budidaya ayam broiler. Pengaturan cahaya yang meliputi intensitas, lama pencahayaan, dan terutama warna masih terbatas digunakan oleh masyarakat peternak karena menggunakan kandang terbuka. Pemeliharaan pada kandang tertutup memungkinkan untuk melakukan pengaturan suhu dan warna cahaya. Suhu dan warna cahaya memiliki pengaruh dalam merangsang tingkah laku dan berakibat kepada performa ayam broiler.
Keyword: 

Judul: Studi Perilaku Ayam Broiler Berbasis Liputan Visual dalam Kandang Tertutup
Abstrak: One of the problems being faced by Indonesian society is inadequacy of meat supply for consumption per capita. One of the most popular and affordable meat in Indonesia, at large, is chicken meat. However, the chicken meat production and supply up to now is still inadequate to meet the meat requirements of Indonesian people. The main factor that causes inadequate of chicken meat production is on-farm managerial factor. This research aims to study the behavioral characteristics of broiler in the broiler house based on visual orservation. The result of this research is expected to be able to increase the quality of broiler production management. The observations were concentrated on the behavior of broilers due to three parameters: temperature, lighting, and noise. The observed behavior include the behavior of locomotion and rest, grouping, shelter seeking, eat and drink, and panting. Temperature is the most significant parameters affecting the behavior of locomotion and rest, grouping, shelter seeking, eat and drink, and panting in broilers in this research. Based on this research, 60% of broilers are affected by high temperature exposure. Panting was the most observable behavior in high temperature exposure. The next observable behavior was shelter seeking due to high temperature exposure. Light intensity directly affects the behavior of locomotion and rest, and the behavior of eat and drink. The most observable behavior affected by increasing of light intensity was locomotion. The higher the light intensity the higher the quantity of locomotion of broilers. This implies that broilers become more active and has less of rest. Noise lower than 80 dB did not affect significantly the behavior of broilers.
Keyword: 

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.
Keyword: