Judul: Evaluasi karakter agronomi dan analisis kekerabatan 10 genotipe lokal kacang Hijau (Vigna radiata L. Wilczek)
Abstrak: One kind of Indonesian important Leguminosae is mungbean (Vigna radiata L. Wilczek). The difference of time harvesting become a serious problem in mungbean cultivation because it needs more labour and time consuming. The objective of this research are evaluating agronomical characteristic of 10 indigenous mungbean genotypes and analyzing genetic distance between those genotypes, based on quantitative and qualitative characteristics. The experiment was carried out at Leuwikopo Experimental Field, Bogor Argricultural University, Dramaga, Bogoron April to August 2013. Design of experiment that use in this research was random block design with one factor that consist of 10genotypes indigenous mungbean and one national variety as controlin three replication. The result showed thatall genotypes were significantly different ingrowth component, plant age component, and production component as contrast. LL3 genotypefound as the best variability (based on production component, plant age component, and synchronized time harvestingcomponent), followed by LL4, LWL, and LKH. Analysis of genetic distance resulted four groups based on quantitative characters and three groups based on qualitative characters by all genotypes.
Keyword: unison harvest, mungbean, genetic distance, agronomy’s characte

Judul: Evaluation of Agronomic Character and Harvesting  Period of F5 Line of Mung Bean (Vigna radiata L.  Wilczek)
Abstrak: Kacang hijau sebagai tanaman pangan legume ketiga terpenting di Indonesia memiliki produktivitas yang masih tergolong rendah. Penelitian ini bertujuan mengevaluasi beberapa galur kacang hijau IPB untuk karakter agronomi, periode panen, dan potensi produksinya. Penelitian ini dilaksanakan di Kebun Percobaan Leuwikopo pada bulan Maret sampai Mei 2022. Rancangan penelitian ini adalah rancangan kelompok lengkap teracak dengan tiga ulangan menggunakan 20 genotipe F5 dan 5 genotipe pembanding. Hasil penelitian menunjukkan bahwa genotipe berpengaruh sangat nyata terhadap umur berbunga, umur matang polong pertama, umur panen pertama, umur panen terakhir, periode panen, tinggi tanaman, panjang rangkaian bunga, jumlah cabang produktif, jumlah polong, panjang polong, dan bobot biji/tanaman, yang mengindikasikan adanya keragaman. Semua karakter memiliki nilai heritabilitas tergolong tinggi, kecuali panjang rangkaian bunga, jumlah cabang produktif, bobot polong, dan bobot biji per tanaman tergolong sedang. Dendrogram yang dihasilkan memperlihatkan adanya 12 kelompok utama pada tingkat kemiripan 66,67 %. Genotipe F5 VR10/V1-10, Lom2/129-43, Lom2/129-37, dan Lom2/129-2 terpilih sebagai kandidat galur berdasarkan karakter periode panen pendek (18-28 hari) dan hasil tinggi (11,3-15,4 g)., Mung bean, the third most important legume food crop in Indonesia, has low productivity. This study aims to evaluate several IPB mung bean lines for their agronomic characters, harvest period, and yield potential. This research was carried out at the Leuwikopo Experimental Field in March-May 2022. The research design was an randomized complete block design with three replications using 20 genotypes F5 and 5 control genotypes. The results showed that genotype had a very significant effect on flowering age, first mature pod emergence, first harvest age, last harvest age, harvest period, plant height, inflorescence length, number of productive branches, number of pods, pod length, and seed weight per plant. All characters had high heritability values, except for inflorescence length, number of productive branches, pod weight, and seed weight per plant which were classified as moderate. The resulting dendrogram showed 12 main groups at a similarity level of 66,67 %. Genotypes VR10/V1-10, Lom2/129-43, Lom2/129-37, and Lom2/129-2 were selected as candidate lines based on their short harvest period (18-28 days) and high yield (11,3-15,4 g).
Keyword: dendrogram, genotipe, heritabilitas, periode panen, seleksi

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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