Judul: Studi morfologi dan ketahanan terhadap Pseudomonas saolanasearum E.  F. Smith pada F2 persilangan antara Capsicum frutescens L. (CR 04) x Capsicum annum L. (CB 12A)
Abstrak: F2 hasil persilangan antara Capsicumfrutescens L. (CR 04) x Capsicum a1111uum L. (CB 12A) pada warna bunga bersegregasi menjadi ungu, putih keunguan dan putih, wama anther menjadi biru keunguan dan ungu, warna daun bervariasi antara hijau, hijau tua dan hijau keunguan, wama batang utama menjadi hijau dan hijau bergaris ungu, wama buku semuanya berwama ungu, wama buah muda bervariasi menjadi hijau, hijau tua dan hijau keunguan, wama buah matang adalah merah dan merah tua, posisi bunga saat anthesis dan posisi buah adalah menggantung dan tidak menggantung se<langkan tipe pertumbuhan adalah prostrat, kompak dan tegak. Beberapa sifat seperti warna bunga, wama anther, wama daun, Wama batang utama, wama buah muda dan wama buah matang dikendali­kan oleh dua gen. Beberapa sifat lain seperti tipe pertumbuhan dan posisi bunga/buah dikeodalikan oleh satu gen dengan interaksi anter ale! dominan lak penuh. Wama buku bersegregasi tidak mengi­kuti hukum Mendel hal ini diduga karena populasi F2 kurang memadai dan karena banyaknya tanaman yang mati terserang layu bakteri sebelum pengamatan dilakukan. Pigmen anthosianin yang mengha­silkan wama ungu pada bunga, anther, daun, batang utama, buah muda dan buah matang dikendalikan oleh gen yang sama. F2 mempunyai postur Iebih tinggi, jumlah cabang lebih banyak, umur berbunga Iebih genjah dan bobot buah pertanaman yang lebih tinggi dibandingkan kedua tetuanya. Sedangkan rata-rata panjang buah, diameter buah, jumlah biji perbuah dan bobot I 00 biji pada F2 lebih kecil jika dibandingkan dengan C. annuum (CB 12A) dan lebih besar jika dibandingkan dengan C. frutesce11s (CR 04). Selain itu F2 hasil persilangan antara C. frutescens (CR 04) x C. a1111uum (CB 12A) mempunyai tingkat kerentanan yang tinggi terhadap penyakit layu bakteri yang disebabkan oleh P. solanacearum jika <libandingkan ke<lua tetuanya.
Keyword: Capsicum annuum, Capsicum frutescens L

Judul: Pewarisan Karakter Morfologis dan Agronomis pada Persilangan Antara Cabai Besar dan Cabai Keriting (Capsicum annuum L.)
Abstrak: Pepper productivity of Indonesia is 6.3 ton/ha in 2008, which could be increased up to 12-20 ton/ha. One of strategy to improve productivity is development of superior variety via hybridization and selection process that need information of inheritance pattern and heritability value. This research studied the pattern of inheritance of morphologic and agronomic traits in the crossing of double haploid of big pepper (Tit-Super) and curly pepper (Laris), F1, and F2 population. Morphologic traits that included main stem color, node color, flower position, leaf color, leaf shape, and plant growth habit were segregating in F2 TS x LR population. Each trait was controlled by at least two genes. Agronomic traits that included 30 days after planting height, days to flowering, days to fruiting, plant height, main stem length, fruit diameter, fruit weight, and number of seed per unit fruit were segregating with high variability. It was indicated that the traits were controlled by poly genes. Based on agronomic trait: fruit per plant, fruit diameter, and fruit weight which have higher viability and heritability value (>82.9%) could be selected ten individual from 99 plants with high index selection from F2 TS x LR population
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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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