Judul: Pengaruh Konsentrasi Dan Frekuensi Pemberian Alar Terhadappertumbuhantanaman Krisan Pot Varietas Rage
Abstrak: Persaingan pasar krisan pot yang ketat menuntut produsen untuk dapat memproduksi krisan pot yang berkualitas tinggi dengan biaya produksi yang rendah. Penampakan krisan pot menjadi hal yang sangat penting. Penilaian kualitas krisan pot terutama dilihat dari tinggi tanaman, keserempakan berbunga, keseimbangan antara tajuk, bunga dengan tinggi tanaman. Untuk meneapai tinggi yang ideal yaitu 21 em, maka krisan pot harus dikendalikan pertumbuhannya dengan menggunakan zat penghambat tumbuh, salah satunya alar. Harga alar yang semakin tinggi menyebabkan biaya produksi krisan pot meningkat.
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Judul: Pertumbuhan Tanaman Krisan Pot (Chrysanthenumm morivolium var Rst) pada Berbagai Konsentrasi Pemupukan  dan Alar
Abstrak: Clirysanthemzon spp. are cultivated flowers as a member of Asteraceae have a high requirement of macro nutrients and regulation height with growth retardants chemical. The aims of the researclt was to find out the most accurately fertilizer concentration composition and the most compatibility of alar for growth of pot mutn (Clnysanthemunz morfolium var Rsl). This research used Randomized Complete Factorial Design consisting 2 factors i.e. concentration of fertilizer and concentration of alar by 5 replication for each. Coinbinations of fertilizer are used CaNO,, KNO,, DAP, and MgSOn. The pot mum with treatment fertilizer of 80gl1001 CaNO;, 25gI1001 KNO,, 35gl1001 DAP, 25gl1001 MgSOR, and alar of 2,5g/1 (P3A2) showed the best growth level in number of lateral buds, number of blossom flowers, diameter flower and total chlorophyll concentration. The increasing of fertilizer in this research was not significant in all treatments, except number of lateral buds. The pot mum growth with alar are significant in height of plant, number of lateral buds, internode, leaf colour, length of pedicle, and number of bud flowers.
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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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