Judul: Growth and Yield Evaluation of IPB Cayenne Pepper Capsicum annnum L. and Capsicum frutescens L.
Abstrak: Cabai rawit merupakan salah satu komoditas hortikultura yang penting dan mempunyai nilai ekonomi tinggi bagi masyarakat Indonesia. Tujuan penelitian ini adalah untuk mengevaluasi pertumbuhan dan daya hasil genotipe-genotipe cabai rawit spesies Capsicum annuum L. dan Capsicum frutescens L. Rancangan percobaan yang digunakan adalah rancangan kelompok lengkap teracak (RKLT) satu faktor dengan tiga ulangan. Bahan tanam yang digunakan adalah lima genotipe cabai rawit Capsicum annuum L. (F12.145291-10-7-1-1-2-1-3-6-1-3, F13.160291-3-12-5-51-1-1-2-2-1-1-5, F9.145291-14-9-3-12-1-1-2, serta varietas pembanding komersil Bara dan Genie) dan tujuh genotipe cabai rawit Capsicum frutescens L. (F1.285290, F1.340290, F1.372340, F1. 373340, Shadiva, serta varietas pembanding komersil Rawita F1 dan Bonita). Galur F9.145291-14-9-3- 12-1-1-2 memiliki panjang buah, tebal daging buah, bobot per buah, serta bobot buah per tanaman yang lebih tinggi daripada varietas pembanding. Galur F12.145291-10-7-1-1-2-1-3-6-1-3 memiliki diameter buah, bobot per buah, dan bobot buah per tanaman yang lebih tinggi dari varietas pembanding. Hibrida F1.285290 memilliki jumlah buah per tanaman yang jauh lebih banyak dibandingkan dengan varietas pembanding. Galur uji Shadiva memiliki bobot per buah yang lebih baik daripada varietas pembanding., Cayenne pepper is one of the important horticultural commodities and has high economic value for the people of Indonesia. The aim of the experiment was to evaluate the growth and yield of cayenne pepper genotypes of Capsicum annuum L. and Capsicum frutescens L. species. The experimental design used was a onefactor randomized complete block design (RCBD) with three replications. Plant materials that used were five genotypes of cayenne pepper Capsicum annuum L. (F12.145291-10-7-1-1-2-1-3-6-1-3, F13.160291-3-12-5-51-1-1-2-2-1-1-5, F9.145291-14-9-3-12-1-1-2, and commercial comparison varieties Bara and Genie) and seven genotypes of cayenne pepper Capsicum frutescens L. (F1. 285290, F1.340290, F1.372340, F1.373340, Shadiva, and commercial comparison varieties Rawita F1 and Bonita). The F9.145291-14-9-3-12-1-1-2 line produced higher fruit length, flesh thickness, weight per fruit, and fruit weight per plant than the comparison varieties. The F12.145291-10-7-1-1-2-1-3-6-1-3 line had higher fruit diameter, weight per fruit, and fruit weight per plant than the comparison varieties. The F1.285290 hybryd had much higher number of fruits per plant than the comparison variety. Shadiva test line had a better weight per fruit compared to comparison variety.
Keyword: cayenne pepper, genotype, variety, vegetable, yield

Judul: Performance and Yield Evaluation Seven Genotype of IPB Hybrid and Non Hybrid Red Cayenne Pepper (Capsicum frutescens L.)
Abstrak: Cabai rawit merah (Capsicum frutescens L.) merupakan salah satu komoditas hortikultura yang penting dan mempunyai nilai ekonomi tinggi bagi masyarakat Indonesia. Hal ini menjadikan kegiatan pemuliaan tanaman cabai rawit merah perlu untuk dilakukan. Penelitian ini bertujuan mengevaluasi keragaan dan daya hasil tiga genotipe cabai rawit merah hibrida dan empat genotipe cabai rawit non hibrida dengan 3 varietas pembanding. Penelitian dilaksanakan dari bulan September 2022 sampai Maret 2023 di Kebun Percobaan Leuwikopo IPB. Penelitian terdiri dari satu faktor yaitu genotipe (7 genotipe dan 3 varietas pembanding). Penanaman menggunakan rancangan kelompok lengkap teracak dengan tiga ulangan. Hasil penelitian menunjukkan bahwa terdapat perbedaan keragaan dan daya hasil antar genotipe cabai rawit merah. Umur berbunga semua genotipe uji berkisar 41,33-45,67 HST dengan umur panen yang berkisar antara 83,33-92,67 HST. Persentase tanaman hidup yang diamati pada akhir panen berkisar antara 37,50-70,83% dengan varietas pembanding Rawita F1 yang memiliki persentase terendah sebesar 37,50%. Genotipe F1.372340 merupakan genotipe dengan produktivitas yang paling tinggi mencapai 4,80 ton ha-1. Produktivitas genotipe tersebut masih lebih tinggi dibandingkan produktivitas varietas pembanding yang berkisar 1,48-2,72 ton ha-1. Genotipe uji memiliki daya simpan berkisar 9,30-15,00 HSP yang sama atau lebih baik daripada varietas pembanding yang berkisar 9,67-12,33 HSP., Red cayenne pepper (Capsicum frutescens L.) is one of the important horticultural commodities and has high economic value for the people of Indonesia. This makes the chili plant breeding activities necessary to do. This research aims to evaluate the performance and yield of three genotypes of hybrid red cayenne pepper and four genotypes of non hybrid red cayenne pepper with three differences varieties. The research was carried out from September 2022 to March 2023 at the Leuwikopo Experimental Garden, IPB. The research consisted of one factor, which is genotype (7 genotypes and 3 control varieties). Planting using a randomized complete block design with three replications. The results showed that there were differences in performance and yield between red cayenne pepper genotypes. The flowering ages of all genotypes ranged from 41.33-45.67 DAP with the harvest ages ranging from 83.33-92.67 DAP. The percentage of live plants observed at the end of harvest ranged from 37.50-70.83% with the Rawita F1 variety having the lowest percentage of 37.50%. The F1.372340 genotype was the genotype with the highest productivity, reaching 4.80 tonnes ha-1. The productivity of these genotypes was still higher than the productivity of the control varieties, which ranged from 1.48 to 2.72 tons ha-1. The test genotypes had shelf life ranging from 9.30-15.00 DAH which was the same or better than the control varieties which ranged from 9.67-12.33 DAH.
Keyword: cayenne pepper, evaluation, hybrid, non hybrid, productivity

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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