Judul: Yield evaluation of 17 chili pepper (Capsicum annuum L.) lines in Bogor, West Java.
Abstrak: This yield evaluation research was done to evaluate and select the potential new chili pepper line created by the Plant Breeding Program in the Department of Agronomy and Horticulture of Bogor Agricultural University. The objectives of this research were to evaluate the variability and yield of 17 new lines compared to three commercial varieties, and calculate estimated character broad sense heritability values. This research had been done from November 2011 until May 2012 in Plant Breeding Laboratory, Department of Agronomy and Horticulture, Bogor Agricultural University (IPB) and Leuwikopo Experimental Station, Dramaga (6o56’34’’S, 106o72’56’’E). The genetic materials used in this research were 17 open pollinated chili pepper lines and three commercial varieties. The chili peper lines were IPB 110005-91-13-12, IPB 110005-91-13-4, IPB 110005-91-17-18a, IPB 110005-91-17-3, IPB 110005-91-4-6, IPB 110005-91-4-8, IPB 120005-1-1- 17, IPB 120005-5-11-1, IPB 120005-5-11-2, IPB 120005-5-19-3, IPB 009019-3- 4-10, IPB 009019-3-4-7, Pesona I-1, Pesona I-2, IPB 002046-2-5-8, IPB 002046- 2-14c-14 and IPB 002001-4-3b-5. While the three commercial varieties were Lembang I, Trisula and Tit Super. This research was arranged in Randomized Complete Block Design. It used 20 different chili genotypes with three replications, therefore there were 60 experimental units. Analysis of quantitative data was done by using analysis of variance (ANOVA) and Dunnett test with α = 5%. Estimated broad sense heritability value was also calculated to measure the role of genetic factors in the phenotype. Result showed that genotype had a very significant influence in almost all character, except for the variable of total marketable fruit weight per plant and fruit length. The lines Pesona I-1, Pesona I-2, IPB 110005-91-17-3, IPB 120005- 1-1-17, IPB 120005-5-11-2, IPB 009019-3-4-10 and IPB 110005-91-13-4 are new chili pepper lines that had higher yield than the compared varieties. All of the quantitative character that were observed had high estimated broad sense heritability value. This shows that environmental factors were not as influential as genetic factors in the chili pepper plant phenotype. There are also characters that had positive and significant correlation with chili pepper plant height, fruit length, fruit weight, fruit weight per plant, fruit per plant and potential productivity.
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Judul: Uji Daya Hasil Sepuluh Galur Cabai (Capsicum annuum L.) Bersari Bebas yang Potensial Sebagai Varietas Unggul
Abstrak: The objective of this research is to compare several lines of expecting a open pollinated variety chilli as a result from Breeding Laboratory of Bogor Agricultural University with OP chilli variety which have been already in the marketplace and get a strain that has a superior characteristics than the comparison varieties. This research conducted on July 2010 until January 2011 in Leuwikopo Experimental Farm, Bogor Agricultural University. The experiment was carried out by using a random complete block design with thirdteen treatment and three replicates so completely there are 39 units of the experiment. Strains tested i.e. F6001004-5, F6002003-9, F6002005-4-76, F6002046-2, F6015002-8, F7002001-4, F7009002-1, F7009015-4, F7009019-1, and F7015008-5, next compared to three commercial chili varieties i.e. Trisula, Gelora, and TIT super. v Variables observed covering quantitative and qualitative character. Evaluation of quantitative characters plant observed covering plant height, dicotomous height, stem diameter, wide- canopy, wide leafs, leaf length, flowering age, weight per fruit, the weight of fruit worthy of the market, and the total weight of the fruit. The evaluation of qualitative characters including plant growth habit, stem shape, stem color, leaf shape, leafs color, leaf shape edges, the surface shape of the leaf, corolla color, anther colour, flower position, fruit shape, the color of the young fruit, dark fruit color, and shape of the fruit skin surface. Evaluation character based on variables fruit production plant showed there were F6002046-2, F6001004-5 and F7009015-4. strain are considered worthy developed as a potential superior varieties.
Keyword: genetic, qualitative character, quantitative character

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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