Judul: Evaluation of Performance and Yield Power of 15 Lines of Pulut Corn (Zea mays ceratina) IPB Collection
Abstrak: Jagung pulut merupakan salah satu jenis jagung yang potensial dijadikan pengan fungsional, karena kandungan amilopektin yang tinggi. Penelitian ini bertujuan untuk mengevaluasi keragaan dan daya hasil 15 galur jagung pulut koleksi IPB. Penelitian dilaksanakan pada bulan November 2022 sampai Februari 2023 di Kebun Percobaan Leuwikopo, Departemen Agronomi dan Hortikultura Fakultas Pertanian, Institut Pertanian Bogor. Penelitian ini terdiri atas 1 faktor yaitu 15 galur pulut koleksi IPB. Penanaman menggunakan rancangan kelompok lengkap teracak (RKLT) dengan tiga ulangan. Hasil penelitian menunjukkan bahwa terdapat perbedaan karakter agronomis, hasil biji, dan kualitas jagung. Galur JPS 13 6 5 5 dan JPS 13 6 1P 20 menunjukkan hasil yang lebih baik pada beberapa parameter, yaitu tinggi tanaman, panjang tongkol, dan jumlah biji per baris, sedangkan galur JPS 13 6 1P 20 menunjukkan hasil yang lebih baik pada beberapa karakter, yaitu jumlah daun, umur berbunga jantan, dan daya hasil pada 15 galur jagung pulut koleksi IPB diharapkan dapat memberikan informasi penting untuk pengembangan varietas jagung pulut yang lebih unggul di masa depan. Kata kunci: daya hasil, evaluasi keragaan, jagung pulut, galur jagung, kualitas jagung
Keyword: Sweet Corn, Performance Evaluation, Yield, Corn Quality, Corn Germplasm

Judul: Performance Evaluation and Yield Power on the IPB Purple Hybrid Sweet Corn (Zea mays saccharata Sturt).
Abstrak: Jagung manis (Zea mays saccharata Sturt) atau sweet corn merupakan komoditas hortikultura yang banyak digemari. Perakitan varietas jagung manis ungu perlu terus dilakukan untuk mendukung peningkatan produktivitas jagung manis dan progam biofortifikasi pangan. Institut Pertanian Bogor memiliki beberapa galur hibrida jagung manis ungu yang belum diuji keunggulannya. Penelitian ini bertujuan mengetahui keunggulan calon varietas jagung manis ungu IPB. Penelitian dilakukan bulan Oktober-Januari di kebun Percobaan PKHT IPB Pasir Kuda. Penelitian terdiri atas 1 faktor yaitu genotipe (1 genotipe uji dan 3 varietas komersil). Penanaman menggunakan rancangan kelompok lengkap teracak yang terdiri atas 4 ulangan. Hasil penelitian menunjukkan bahwa produktivitas genotipe uji JMU H1 IPB lebih rendah dibandingkan varietas pembanding. Padatan terlarut total genotipe uji setara dengan varietas pembanding potensial digunakan sebagai penciri utama genotipe JMU H1 IPB yaitu adanya antosianin yang kuat pada tulang daun, ruas batang, akar penyangga, selain dasar bunga jantan, pada rambut bunga betina, dan warna kelobot yang merah keunguan (N79 C)., Sweet corn (Zea mays saccharata Sturt) is a popular horticultural commodity. The assembly of IPB purple sweet corn varieties needs to continue to support to increase sweet corn productivity and the food biofortification program. The Bogor Agricultural Institute has several hybrid lines of purple sweet corn which superiority character has not been tested. This research was aimed to determine the superiority of the candidate of IPB purple sweet corn variety. Observations were carried out in October-January at the PKHT IPB Pasir Kuda Experimental Garden. The research consisted of 1 factor, namely genotype (1 test genotype and 3 commercial varieties). The experimental design was arranged in randomized complete group design consisting of 4 replications. The results showed that the productivity of the JMU H1 IPB genotype was lower than the comparison variety. The sugar content of total soluble solids of JMU H1 IPB were equivalent than the comparison variety. Characters that have the potential to be used as the main characteristics of the JMU H1 IPB genotype are the presence of strong anthocyanins in the leaf veins, stem segments, supporting roots, apart from the base of the male flowers, the hairs of the female flowers, and the purplish red color of the husks (N79 C).
Keyword: antosianin, biofortifikasi, hibrida, jagung manis, varietas unggul

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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