Judul: Daya gabung dan heterosis komponen hasil serta keragaan tomat (Lycopersicon esculentum Mill) hasil persilangan half diallel
Abstrak: The aim of this research was to study estimation of the general combining ability (GCA), the specific combining ability (SCA), the heterosis and the heterobeltiosis of fifteen hybrids and performances of tomato (Lycopersicon esculentum Mill.) in half diallel crosses. This research was conducted at Genetic and Plant Breeding Laboratory and IPB Experimental Field, Leuwikopo, Dramaga, Bogor, from March-July 2013. The experimental design used was randomized complete block design (RCBD) single factor with three replications. Plant materials were six tomato inbred lines, fifteen hybrids from hybridization half diallel crosses and three commercial hybrids. Genotype IPB T3 x IPB T73, IPB T13 x IPB T64 had the best combining ability, heterosis, heterobeltiosis and performances in several traits observed.
Keyword: RCBD, parents, hybrid, genotype, breeding

Judul: Heterosis dan Daya Gabung pada Persilangan HalfDiallel Cabai Besar dan Cabai Keriting (Capsicum annuum L.)
Abstrak: The aim of this research was to study estimation the heterosis and heterobeltiosis of fifteen hybrids, the general combining ability (GCA), and the specific combining ability (SCA) of six chili inbred lines of hybridization between big and curly pepper (Capsicum annuum L.). This research was conducted at Genetic and Plant Breeding Laboratory and IPB Experimental Field, Leuwikopo, Dramaga, Bogor, from September 2012 to March 2013. The experimental design used was randomized complete block design (RCBD) single factor with three replication. Plant materials were six chili inbred lines, fifteen hybrids from hybridization half diallel crosses, and two commercial hybrids. Genotype IPB C159 x IPB C120, IPB C159 x IPB C111, IPB C159 x IPB C5, IPB C120 x IPB C5, IPB C111 x IPBC2, IPB C19 x IPB C5, and IPB C5 x IPB C2 had positive heterosis, heterobeltiosis, and SCA values for some variables observed. All these genotypes had advantages that were better than the comparison of varieties TM 999 and Gada on some characters observed
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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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