Judul: Yield Evaluation of M2 Generation Cayenne Pepper (Capsicum frutescens L.) M2 in Lowland
Abstrak: Cabai rawit (Capsicum frutescens L.) merupakan komoditas hortikultura yang memiliki nilai ekonomi tinggi dan biasa dikonsumsi sehari-hari oleh masyarakat Inonesia sebagai bumbu masakan, baik pada makanan rumahan maupun produk industrial. Produktivitas dan produksi C. frutescens dapat ditingkatkan melalui perakitan varietas baru, salah satunya melalui mutasi. Penelitian ini bertujuan mengevaluasi daya hasil dan keragaan karakter morfologi pada empat mutan cabai rawit yang akan dibandingkan dengan enam genotipe pembanding. Rancangan percobaan yang digunakan adalah rancangan kelompok lengkap teracak (RKLT) dengan satu faktor perlakuan berupa genotipe. Hasil dari penelitian ini menunjukkan bahwa terdapat beberapa karakter yang memiliki perbedaan yang signifikan pada genotipe yang diuji. CHM2 memiliki umur berbunga dan umur panen yang lebih cepat dibandingkan pembanding. CHM4 memiliki diameter batang lebih lebar, daging buah yang lebih tebal, dan produktivitas yang lebih tinggi dibandingkan pembanding., Cayenne pepper (Capsicum frutescens L.) is a horticultural commodity that has high economic value since consumed daily as a common spice in most Indonesian cuisine on the household menu and in industrial products as well. In order to increase productivity and production of C. frutescens, new varieties have been developed through mutation approach. This study aims to evaluate the yield and morphological characters of four selected mutants compared to six established genotypes. The experimental arranged under a single factor randomized complete block design, namely genotype. The results showed that the evaluated genotypes have significant differences for some observed characters. CHM2 has earlier flowering and harvesting time compared to control genotypes. CHM4 has a wider stem, thicker fruit flesh, and higher yield than control genotypes.
Keyword: horticulture, morphological character, new varieties

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: 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.
Keyword: