Judul: Seed Growth Response 17 Varieties of Cayenne Pepper (Capsicum frutescens L.) in The Saline Environment.
Abstrak: Cabai rawit (Capsicum frustescens L.) adalah rempah penting Indonesia dalam menu sehari-hari dan bahan dalam industri makanan sehingga fluktuasi suplai dapat menyebabkan fluktuasi harga cabai rawit di pasar. Untuk memenuhi peningkatan permintaan, perlu dilakukan ekstensifikasi ke lahan marjinal seperti tanah salin yang makin luas. Penelitian ini bertujuan untuk mengetahui respons morfologi dari 17 varietas cabai rawit terhadap kondisi salin selama masa pembibitan. Penelitian ini dilaksanakan dari Oktober sampai Desember 2019 di Rumah Kaca Kebun Percobaan Cikabayan Bawah menggunakan rancangan acak lengkap (RAL) dengan dua faktor dan tiga ulangan. Faktor pertama yang digunakan adalah salinitas yang terdiri dari dua perlakuan, yaitu konsentrasi 0 g L-1 dan 5 g L-1, dan faktor kedua adalah varietas yang terdiri dari 17 varietas meliputi Pulaipila Putih, Pulaipila Hijau, Genie, Canon, Rinta F1, Sigantung, Kara, Bhaskara, Bonita, Sona, Tripang, Merapi, Catas, Lojana, Segana, Taruna, dan CR14. Hasil penelitian ini menunjukkan bahwa cekaman salinitas menghambat pertumbuhan vegetatif bibit yang terlihat dalam tinggi tanaman, jumlah daun, panjang dan lebar daun, bobot tanaman, dan jumlah tanaman mati. Berdasarkan analisis ragam, tidak terdapat interaksi signifikan antara perlakuan cekaman salin dengan varietas cabai rawit. Hal tersebut menunjukkan tidak adanya perbedaan respons dari varietas yang diuji dengan kondisi salinitas., Cayenne pepper (Capsicum frutescens L.) is an important Indonesian spices, that used in daily menu and as ingredient in food industry as well, therefore fluctuation in supply caused price fluctuation in the market. In order to fulfill the increase demand, extensification to marginal land such as salin soil is necessary. The research aimed to elucidate morphological response of 17 varieties of cayenne pepper to salin condition during seedling stage. This experiment was conducted from October to December 2019 at Cikabayan Bawah Research Station Greenhouse, using completely randomized design (CRD) with two factors and three replications. The first factor used in this research is salinity that consist of 2 levels, which is 0 g L-1 and 5 g L-1 concentration, and second factor is variety that consist of 17 genotype of Pulaipila Putih, Pulaipila Hijau, Genie, Canon, Rinta F1, Sigantung, Kara, Bhaskara, Bonita, Sona, Tripang, Merapi, Catas, Lojana, Segana, Taruna, and CR14. The result of this research showed that salinity stress inhibit seedling vegetative growth which could be seen in plant height, number of leaves, leaves length and width, plant weight, and number of dead plant. Based on analysis of variance, there are no significant interaction between salinity condition and varieties treatment, thats indicate that no response difference of varieties to salinity condition.
Keyword: growth inhabitation, leave characters, plant weight

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.
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