Judul: Keragaan dan Keragaman Galur - Galur F5 Kedelai Hasil Metode Single Seed Descent dari Persilangan Argomulyo x Tanggamus
Abstrak: The objectives of this experiment to get information on agronomic performance and variation of F5 soybean lines developed by single seed descent method from Argomulyo x Tanggamus. This experiment was conducted at Augmented Design in Randomized Complete Block Design (RCBD) genotype as the single factor. The genotypes tested were 125 F5 lines with no replication and 3 checks consisted of variety Tanggamus, Argomulyo and Wilis replicated six times. This experiment was conducted at Leuwikopo experimental field and the Plant Breeding Laboratory, Department of Agronomy and Horticulture, Bogor Agricultural University from April to September 2014. Results of this experiment showed high variation among F5 lines in plant height, number of nodes per plant, number of productive nodes per plant, number of full pods per plant, and number of pods per plant. Those characters were not significant with Tanggamus and higher than Argomulyo. The highest heritability and broad sense genetic variation was found for plant height, number of nodes per plant, number of productive nodes per plant, number of full pods per plant, number of pods per plant, and weight seed per plant
Keyword: Bogor Agricultural University (IPB), soybean, heritability, genetic variation, agronomic performance

Judul: Uji daya hasil galur kedelai (Glycine max (L.) Merr.) hasil iradiasi sinar gamma di tanah masam
Abstrak: Soybean ( Glycine max L. ) is one of the main commodity nuts in Indonesia because it is a source of vegetable protein important to diversify food. The objective of the research was to evaluate the yield of fifteen soybean lines gamma ray irradiation produced with two check varieties, namely Argomulyo as progeny and Tanggamus as drought acid tolerant varieties. The evaluation was aimed to gain information on the performance of agronomic characters of the advanced breeding lines of soybean and to select high yielding lines for released high yield variety soybean acid adaptability. The research conduted at folk’s field in Jasinga subdistrict, Bogor regency, in February 2012 – June 2012 as a part of preface trial. The design used was randomized complete block design (RCBD) with 3 replication. The research result showed that flowering time, harvesting time, number of productive node, number of total pod, number of seed/pod, and 100 seed weight were very significantly different among lines evaluated. Plant height, number of productive branch, number of filled pod, and number of total pod had positive correlated to seed/plant weight. Lines that showed of the good performance for the some characters to influenced the yield were M100-33-6-11, M100-96-53-6, dan M200-93-49-13.
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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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