Judul: Pengelolaan Tanaman Anggur (Vitis vinifera) di PT Perkebunan Nusantara XII.
Abstrak: The purpose of this internship is to improve technical and managerial skill. The internship program was conducted at Pasewaran Estate, PTPN XII, Banyuwangi, East Java for three months from February 13th until May 13th 2012. The methods of this internship is conducted by following all the practices in the field, discussion, and plant observation. The information were collected including primary and secondary data. The primary data are number of growth buds after pruning, percentage of bud growing after pruning, percentage of flowering after pruning, and technical practices of viticulture in Pasewaran Estate. The secondary data is company data. Pruning management of grape vine affectes productivity. The number of shoots which are left after pruning affect growth buds. Not all buds will grow into new shoots after pruning. The number of buds that are left on the cutting determines the number of new shoots emerging. Flowering occurs in plants after growing shoots after pruning. Grafting vine varieties by Jestro AG 60 with Kediri Kuning shows no different success than grafting with a variety of Prabu Bestari with Jestro AG 60.
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Judul: Pengelolaan pemangkasan jeruk keprok (citrus sp.) Di kebun blawan, ptpn xii , bondowoso, jawa timur
Abstrak: The internship programe was conducted at Blawan Estate, PTPN XII, Bondowoso, East Java for three months from February 13th until May 13th 2012. The purpose of this internship program is to improve technical and managerial skill. This internship programe was conducted using direct and indirect method, by followed all of the practices in the field, field plantation observation, and discussion with staf (direct method). The information were collected including primary and secondary data. Pruning criteria, plant condition, labour achievement, pruning time, and bud growing rapidity was collected as primary data. Pruning could decrease the intensity and severity of antracnose. However, management pruning of orange could not implementable as SOP (Standart Operating Prosedure).
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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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