Judul: Pengelolaan Pembibitan Kelapa Sawit ( Elaeis guineensis Jacq) Di Kebun Teluk Bakau, PT Bhumireksa Nusa Sejati, Kabupaten Indragiri Hilir, Provinsi Riau
Abstrak: This internship was aimed to acquire the knowledge, technical skills and management of trainer students to work professionally, increase the soft skill of students to prepare themselves to be professional worker, especially in management aspects of oil palm nursery. This internship has been done in Teluk Bakau Estate, PT Bhumireksa Nusa Sejati, since February to June 2014. The technical aspects that were carried out during the internship consist of following the existing activities in the oil palm nursery in Teluk Bakau Estate, fertilizing the immature plants, weed control on immature plants, and harvesting. Mananejerial aspects were performed as a companion foreman and division assistant. Observation were carried out on germination growing percentage, seedling plant height, and of abnormal seedlings percentage in the pre-nursery. From observation, we found that seedling plan height increase about 2 cm/week, germination growing was 95.9 percent, and abnormal seedlings was 5.9 percents.
Keyword: Bogor Agricultural University (IPB), pre-nursery, germination growing, abnormal seedling

Judul: Manajemen Penunasan Kelapa Sawit (Elaeis guineensis Jacq.) di Sungai Bahaur Estate, PT Windu Nabatindo Abadi, Kalimantan Tengah
Abstrak: This internship was conducted at Sungai Bahaur Estate (SBHE), PT Windu Nabatindo Abadi from March to July 2014. Apprenticeship aims to increase the understanding and skill on technical and managerial aspects of oil palm plantation, especially in pruning management. The observation was conducted on the pruning system, number of leaf frond retained, pruning technique, sex ratio of flower and number of fruit bunches. Pruning was applied according to corrective pruning system. The number of leaf frond which is maintained following the pruning techniques which is applied based on the age of the plant. The sex ratio of flowers are used to estimate the potential of plants to bear fruit. Implementation of pruning at SBHE had not run well according to SOP, several constraints were found such as the low discipline harvesters, lack of supervision, and the absence of strict sanctions.
Keyword: Bogor Agricultural University (IPB), pruning techniques, sex ratio, number of frond

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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