Judul: Evaluation of Pod Dehiscent Resistance and  Productivity Levels of 22 Genotypes Green Beans (Vigna radiata L.) Selection  Results of IPB
Abstrak: Kacang hijau (Vigna radiata L. Wilczek) pada umumnya memiliki genotipe yang rentan mengalami pecah polong sehingga banyak terjadi kehilangan hasil sebelum panen dan saat panen. Penelitian ini bertujuan untuk mengevaluasi ketahanan pecah polong dan beberapa karakter agronomi galur-galur kacang hijau IPB. Penelitian dilaksanakan di kebun Percobaan Balai Penelitian Bioteknologi dan Sumberdaya Genetik Pertanian, Kecamatan Bogor Barat, Kota Bogor dari bulan November 2022 hingga bulan Maret 2023. Penelitian ini menggunakan rancangan kelompok lengkap teracak dengan tiga ulangan. Sebanyak 22 genotipe kacang hijau dan 2 varietas pembanding yaitu Vima 1 dan Vima 5 ditanam hingga sampai masa panen dan dilakukan pengamatan karakter agronomi serta persentase pecah polong. Hasil penelitian ini menunjukkan beberapa genotipe yang diuji memiliki karakter agronomi yang lebih baik dari pembanding. Genotipe F7- Lom2/129-42, F7- VR10/V1-29, F7-VR10/V1-10, F7-Lom2/129-2, dan F5-Lom2/129-125 memiliki karakter yang paling baik dari galur yang diuji dan lebih baik dari varietas pembanding. Galur-galur kacang hijau yang diuji bersifat toleran pecah polong., Mung bean (Vigna radiata L. Wilczek) has most of the genotypes that are prone to pod dehiscent resulting in a lot of yield loss before and during harvest. This study aims to evaluate the resistance to pod dehiscent and several agronomic characters of IPB's green bean lines. The research was conducted at the Experimental Garden of the Balai Penelitian Bioteknologi dan Sumberdaya Genetik Pertanian, West Bogor District, Bogor City from November 2022 to March 2023. This study used randomized complete group design with three replications. A total of 22 mung bean genotypes and 2 control varieties, namely Vima 1 and Vima 5, were planted up to harvest and observed for agronomic characters and the percentage of pod dehiscent. The results of this study indicated that some of the genotypes tested had better agronomic characteristics than the controls The genotypes F7-Lom2/129-42, F7-VR10/V1-29, F7-VR10/V1-10, F7-Lom2/129-2, and F5-Lom2/129-125 had the best characters from the strains tested and better than the comparison varieties. The strains of green beans tested were tolerant dehiscent of the pods.
Keyword: pod dehiscent, agronomic characters, mung bean

Judul: Yield Test of 22 Mung Bean (Vigna radiata L.) Strains  Results of IPB Breeding
Abstrak: Kacang hijau merupakan tanaman legum yang telah dikenal secara luas di Indonesia karena kandungan proteinnya tinggi dan mudah dicerna, kadar lemaknya yang rendah, serta memiliki berbagai manfaat bagi kehidupan. Penelitian ini bertujuan untuk mendapatkan informasi tentang daya hasil 22 galur kacang hijau IPB. Penelitian ini dilaksanakan pada bulan November 2022 hingga Maret 2023 di Kebun Percobaan Balai Penelitian Bioteknologi dan Sumberdaya Genetik Pertanian, Kota Bogor. Penelitian ini terdiri dari satu faktor yaitu 22 genotipe kacang hijau IPB dan dua varietas pembanding. Rancangan percobaan yang digunakan yaitu rancangan kelompok lengkap teracak dengan 3 ulangan. Hasil penelitian menunjukkan adanya perbedaan yang nyata antara genotipe yang diuji. Genotipe yang memiliki produktivitas yang lebih tinggi dibandingkan dengan genotipe pembanding secara deskriptif diantaranya F7-Lom2/129-2, F7- Lom2/129-28, F7-VR10/V1-6, F7-VR10/V1-10, F7-VR10/V1-29, F6- VR422H/129-1, F5-Lom2/129-125, F6-VR480B-213, dan F6-Lom2/V2-6., Mung bean is a legume crop that is widely known in Indonesia because of its high protein content and ease of digestion, low-fat content, and various benefits for life. This study aims to obtain information about the yield of 22 IPB mung bean lines. This research was conducted from November 2022 to March 2023 at the Experimental Garden of the Agricultural Genetic Resources and Biotechnology Research Institute, Bogor City. This study consisted of one factor, namely 22 IPB mung bean genotypes, and two control varieties. The experimental design used was a randomized complete block design with 3 replications. The results showed that there were significant differences between the genotypes tested. The genotypes that had higher productivity compared to the comparative varieties descriptively included F7-Lom2/129-2, F7-Lom2/129-28, F7-VR10/V1-6, F7-VR10/ V1-10, F7-VR10/V1-29, F6-VR422H/129-1, F5-Lom2/129-125, F6- VR480B-213, and F6-Lom2/V2-6.
Keyword: genetic, high-yielding varieties, legume, productivity, protein

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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