Judul: Yield Test and Performance Evaluation Lines of Curly Chili (Capsicum  annuum L.) IPB
Abstrak: Cabai merupakan salah satu sayuran terpenting di Indonesia. Kebutuhan cabai meningkat setiap tahunnya, sehingga perlu adanya perbaikan kualitas dan produktivitas cabai. Penelitian ini bertujuan menguji daya hasil dan mengevaluasi keragaan tujuh galur harapan cabai keriting IPB. Penelitian ini menggunakan rancangan percobaan kelompok lengkap teracak (RKLT) faktor tunggal yaitu genotipe. Penelitian ini menggunakan sebanyak tujuh galur harapan cabai keriting dan tiga varietas pembanding komersial diulang sebanyak tiga kali ulangan sehingga terdapat 30 satuan percobaan. Hasil penelitian menunjukan bahwa genotipe cabai keriting memiliki pengaruh yang nyata terhadap seluruh karakter kuantitatif kecuali umur berbunga dan persentase hidup. Galur G1 (15,55 ton ha-1 ), G2 (15,82 ton ha-1 ), G3 (13,99 ton ha-1 ), G4 (14,79 ton ha-1 ), G5 (19,08 ton ha-1 ), dan SSP (14,75 ton ha-1 ) memiliki produktivitas nyata lebih tinggi dibandingkan varietas pembanding. Galur G1 (81 HST), G2 (81 HST), G3 (86 HST), G4 (81 HST), G5 (79 HST), F6 110005-9-6 (78 HST), dan SSP (80 HST) memiliki umur yang lebih genjah dibandingkan varietas komersial. Pendaftaran untuk varietas komersialisasi potensial dilakukan pada galur harapan G1, G2, G3, G4, dan G5, karena memiliki keunggulan berupa daya hasil dan keragaan yang berbeda dengan varietas pembanding komersial., Chili is one of the most important vegetables in Indonesia. The need for chili increases every year, so it is necessary to improve the quality and productivity of chili. This study aims to test the yield and evaluate the performance of seven promising lines of curly chili IPB. This study used a randomized complete group experimental design with a single factor, namely genotype. This study used seven promising curly chili lines and three commercial comparison varieties, repeated three times so that there were 30 experimental units. The results showed that the curly chili genotype had a significant effect on all quantitative characters except flowering age and live percentage. Lines G1 (15,55 ton ha-1 ), G2 (15,82 ton ha-1 ), G3 (13,99 ton ha-1 ), G4 (14,79 ton ha-1 ), G5 (19,08 ton ha-1 ), and SSP (14,75 ton ha-1 ) had significantly higher productivity than the comparison varieties. The lines G1 (81 DAP), G2 (81 DAP), G3 (86 DAP), G4 (81 DAP), G5 (79 DAP), F6 110005- 9-6 (78 DAP), and CNS (80 DAP) had a lifespan of which are more mature than commercial varieties. Registration for potential commercialized varieties was carried out on the promising lines G1, G2, G3, G4, and G5, because they had advantages in terms of yield and performance that were different from commercial comparison varieties.
Keyword: keragaan, keunggulan,, produktivitas, umur genjah, varietas unggul

Judul: Yield Test and Performance  Evaluation of Hybrid and Non Hybrid Lines of Big Chili (Capsicum annuum L.)  IPB
Abstrak: Cabai (Capsicum annuum L.) merupakan komoditas hortikultura yang memiliki nilai ekonomi tinggi dan banyak dimanfaatkan oleh masyarakat di Indonesia untuk kebutuhan rumah tangga maupun industri. Penelitian ini bertujuan untuk mengevaluasi daya hasil dan keragaan galur hibrida dan non hibrida cabai besar IPB. Penelitian ini dilaksanakan pada bulan September 2020 hingga Februari 2021 di Kebun Percobaan Leuwikopo IPB dan Laboratorium Pemuliaan Tanaman IPB. Rancangan percobaan yang digunakan adalah rancangan kelompok lengkap teracak (RKLT) dengan faktor tunggal yaitu genotipe. Jumlah genotipe yang digunakan terdiri atas 6 galur cabai besar IPB (5 galur non hibrida dan 1 galur hibrida) dan 4 varietas pembanding (2 varietas non hibrida dan 2 varietas hibrida) yang diulang sebanyak 3 ulangan sehingga terdapat 30 satuan percobaan. Hasil penelitian menunjukkan bahwa genotipe cabai besar memiliki pengaruh yang nyata pada karakter tebal daging buah dan lebar tajuk, tidak berpengaruh nyata pada karakter persentase tanaman hidup dan berpengaruh sangat nyata untuk karakter lainnya. Galur hibrida F1.074 x 005 memiliki umur panen yang genjah, yaitu 69–70 HST, sehingga berpotensi didaftarkan sebagai varietas baru. Galur hibrida F1.074 x 005 (19,84 ton ha-1), galur non hibrida F7. 074136–2–3–2–3–2 (12,87 ton ha-1), F6. 074077–173–1 (12,66 ton ha-1), dan F7. 136074–1–4–3–1–9 (12,14 ton ha-1) berpotensi didaftarkan sebagai varietas baru karena memiliki daya hasil yang setara/lebih baik serta keragaan yang berbeda dengan varietas pembanding., Chili (Capsicum annuum L.) is a horticultural commodity that has high economic value and is widely used by people in Indonesia for household and industrial needs. This research aimed to evaluate the yield and performance of non hybrid and hybrid lines of big chili IPB. The research was conducted in September 2020 until March 2021 at Teaching Farm Leuwikopo and Plant Breeding Laboratory IPB. The design used was a randomized complete block design (RCBD) with a single factor, namely genotype. The number of genotypes used consisted of 6 lines of large chili IPB (5 non hybrid lines and 1 hybrid line) and 4 comparison varieties (2 non hybrid varieties and 2 hybrid varieties) with 3 repetitions. Thus, there was total 30 experimental units. The research outcome showed that the big chili lines had a significant effect on flesh thickness and crown width, had no significant effect on the percentage of live and had a very significant effect on other characters. The F1.074 x 005 hybrid line had an early harvest age of 69 70 DAP, so that it had the potential to be registered as a new variety. Hybrid line F1.074 x 005 (19,84 ton ha-1), non hybrid lines F7. 074136–2–3–2–3–2 (12,87 ton ha-1), F6. 074077–1–7–3–1 (12,66 ton ha-1), dan F7. 136074–1–4–3–1–9 (12,14 ton ha-1) has the potential to be registered as a new variety because it has the same/better yield and different performances from the comparison varieties.
Keyword: hibrida, karakter, keragaan, produktivitas, varietas unggul

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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