Judul: Evaluasi karakteristik hortikultura hibrida melon, Cucucmis melo L. introduksi dan hasil rakitan Pusat Kajian Buah-Buahan Tropika (PKBT) IPB
Abstrak: The objective of this experiment was to evaluate and characterize horticultural traits of introduced and PKBT’s melon hybrids and to identify the potential PKBT’s hybrids compare to those of the commercial introduced hybrids. The evaluated hybrid varieties consist of introduction hybrids are Ten Me, Angel, Honey Globe, New Charm, New Century and Apollo and PKBT’s melon are H150 and H7. The experiment was conducted at KP IPB Tajur 2 from September to November 2006 using Randomized Complete Block Design with three replications. The genotype variability was analyzed using analysis of variance method. The result showed that there are significant differences for all characters, except on days of male flowering dan days of hermaphrodite flowering. The experiment also shows a negative correlation between fruit length character and Total Solutable Solid (TSS) and a positive correlation between stem diameter character and TSS. H150 is a PKBT’s Cantaloupe melon hybrid that had a good vegetative growth, orange flesh, high TSS (10.02%Brix) and skin hardness, round shaped fruit and perfect net. H7, an Inodorus cultivar, has some potential characteristics. This hybrid has good vegetative growth, good appearance of fruit, white flesh and the highest TSS (10.50%Brix) than the other Inodorus hybrids. PKBT’s hybrids has higher stem diameter, harder fruit and higher TSS but has longer day to harvest than introduced hybrids. Var. Cantaloupensis has higher stem diameter and skin hardness but has lower fruit weight and longer harvest day than var. Inodorus.
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Judul: Evaluasi karakter hortikultura enam hibrida melon (Cucumis melo L.) seri III hasil pemuliaan pusat kajian buah-buahan tropika (PKBT) IPB
Abstrak: Penelitian ini bertujuan untuk mengevaluasi karakter hortikultura enam hibrida melon dan mengidentifikasi adanya hibrida yang berbeda dari varietas pembanding. Penelitian dilaksanakan di Kebun Percobaan Pusat Kajian Buahbuahan Tropika (PKRT) IPB Tajur 11, Bogor pada bulan Juni sampai September 2005. Penelitian dilakukan dengan menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) faktor tunggal dengan tiga ulangan. Enam hibrida melon yanz digunakan adalah H15, H32, H52, H71, H94, H123 dan satu varietas melon koinersil yakni Action 434 sebagai pembanding. Psda penanaman melon ini digunakan cara budidaya yang sesuai dengan standar prosedur operasional. Kondisi cuaca selama penelitian umumnya banyak turun hujan, ha1 ini menyebabkan serangan hama dan penyakit cukup tinggi. Hasil evaluasi menunjukkan bahwa hibrida H32 memiliki penarnpilan buah yang menarik, bentuk bulat dengan jala yang rapat, juring yang teratur dan wama daging buah jingga. Hibrida H52 memiliki tingkat ketahanan terhadap serangan OPT terutama kumbang daun, embun bulu dan embun tepung yang baik. Hibrida H52 mempunyai umur panen nyata lebih genjah dan kadar PTT yang nyata lebih tinggi dari Action 434. Hibrida H94 memilih? umur berbunga jantan dan umur berbunga hermaprodit yang nyata lebih lama dari Action 434 namun tidak mempengaruhi umur panen. Hibrida tersebut memiliki ketahanan terhadap serangan OPT yang baik dibanding dengan hibrida melon lainnya.
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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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