Judul: Gambaran sel darah merah ayam broiler yang diberi testosteron dosis bertingkat
Abstrak: Tingkat produktivitas ayam berhubungan erat dengan kondisi hematologisnya. Penelitian ini dilaksanakan untuk mengkaji pemberian testosteron terhadap karakteristik sel darah merah (jumlah eritrosit, kadar hemoglobin, dan nilai hematokrit ayam broiler). Penelitian ini menggunakan 12 ayam broiler berumur 15 hari yang dibagi dalam 4 kelompok (K, T1, T2, dan T3). K adalah kelompok kontrol, T1, T2, dan T3 adalah ayam broiler yang dilakukan pemberian 1, 2, dan 4 mg testosteron. Rancangan percobaan menggunakan Rancangan Acak Lengkap dengan 4 perlakuan dan 3 ulangan. Analisis data dilakukan dengan ANOVA yang dilanjutkan dengan uji Duncan. Hasil penelitian ini menunjukkan bahwa testosteron berpengaruh nyata (p<0.05) terhadap jumlah sel darah merah, tetapi tidak berpengaruh nyata (p>0.05) terhadap kadar hemoglobin dan hematokrit. Dosis testosteron yang efektif untuk meningkatkan jumlah sel darah merah adalah 1 mg per ekor.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Broiler chicken, Hematocrit, Haemoglobin, Number of erytrocytes

Judul: Gambaran Sel Darah Merah Ayam Broiler yang Diberi Testosteron Dosis Bertingkat
Abstrak: Productivity is closely related to chicken’s hematological conditions. The research was conducted to study the effect of testosterone given on the characteristics of red blood cells (erythrocytes number, haemoglobin level, and hematocrit values) of broiler chicken. 15 days of 12 broiler chickens were used in this study, with 4 groups (K, T1, T2, and T3). K was control groups, T1, T2, and T3 were broiler chicken which given 1, 2, and 4 mg testosteron respectively. The design of experiment using completely randomized design with 4 treatments and 3 replications. Data analysis was using ANOVA Duncan test. Our results showed that testosterone had significant effect (p <0.05) to the number of red blood cells, but it had no significant effect (p >0.05) to the amount of hemoglobin and hematocrit levels. Testosteron effective dose to increase erythrocytes number is 1 mg per 2 days (T1).
Keyword: broiler chicken, hematocrit, hemoglobin, number of erythrocytes, testosterone

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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