Judul: Pengelolaan Panen Kelapa Sawit (Elaeis guineensis Jacq.) untuk Mendapatkan Produktivitas Tinggi di Kebun Bangun Bandar, PT. Socfindo
Abstrak: This internship activity took place in Bangun Bandar Estate, Serdang Bedagai, North Sumatra from February 2012 to May 2012. The objective of this internship was to learn the techniques of palm oil cultivation especially the harvesting system at Bangun Bandar Estate. The collected data were primary data and secondary data. Palm oil cultivation in this plantation has been running well. The main problem in the plantation is the harvest rotation be come longer from 7 days until 9 days. This occurs as a result of employee absences, holidays and days of rain in general, the fruits quality in BBE plantation is good with an average fruit maturity reaching 99.7 % and the harvest area quality 1.31 %. Based on statistical analysis, harvesting capacity of fruit cutting employer is between 269.5 ± 59.78 fruits/employee.
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Judul: Manajemen Pemanenan Kelapa Sawit (Elaeis guineensis Jacq.) di Kebun Bagan Kusik Estate, PT Harapan Sawit Lestari, Ketapang, Kalimantan Barat
Abstrak: The internship activities were conducted in Bagan Kusik estate, PT Harapan Sawit Lestari, West Kalimantan, starting from February 10 to June 10, 2014. The internship activity had given experience and improve the ability of students or skill in oil palm plantations. Harvesting management which had concerned such as crop rotation, crop density figures, ripe harvest criteria, work performance, menpower, and result of transportation. The crop rotation and menpower had been analyzed by using t-student test and corelation test. The result of t-student test showed that there is a significant difference between the standard harvest interval with the realization of production. Based on the results of correlation test is known that the factors of age, length of employment, education level positively correlated to the production of palm oil. The harvesting management implementation from preparation harvest, how to harvest, and transport the FFB (Fresh Fruit Bunches) to the mill that had been implemented with good, so that the production of palm oil each year has increased.
Keyword: productivity, menpower, harvest densities rate, crop rotation, Bogor Agricultural University (IPB)

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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