Judul: The Determination of Size and Seed Storage Techniques Kepok Banana (Musa sp. ABB Group) From The Hump
Abstrak: This study aims to find out size of the hump that is able to produce seedlings and to find out the best storage techniques to be able to maintain the viability and power shelf. The research was conducted at the Kebun Percobaan Pasirkuda, Ciomas, Bogor and Seed Science and Technology Laboratory, Departmen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor. The study began in February to May 2011. The size of the best hump that have the highest potential growth maximum was 73.33% and the highest number of shoots of 3 shoots per hump is B5 (hump with an average weight of 7400 g and diameter 22.4 cm). The size of the best hump will be a reference for future experiments on storage techniques. The best storage method is without packing and without using fungicides. This method is able to make the hump can be stored for 6 weeks.
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Judul: Morphological and Anatomical Characterization, Development of Test Methods for Germination, and Quality after Storage in Wild Banana Seeds
Abstrak: Daya kecambah yang rendah, tingginya tingkat keragaman pertumbuhan kecambah, dan metode uji daya kecambah yang tidak ada menjadi kendala dalam daya berkecambah biji pisang. Tujuan dari penelitian ini adalah untuk mempelajari mengenai karakterisasi morfologi dan anatomi benih pisang dari beberapa aksesi, dan pengujian pengembangan metode uji daya berkecambah untuk mendapatkan metode uji yang tepat dan mengetahui mutu benih pisang untuk mengetahui viabilitas dan vigor benih yang telah disimpan. Penelitian terdiri atas empat percobaan yaitu (1) karakterisasi morfologi dan anatomi benih beberapa aksesi pisang liar, (2) penetapan pengamatan pertama (first count) dan pengamatan kedua (final count) pada metode uji daya berkecambah benih pisang, (3) pengembangan metode uji daya berkecambah lima aksesi benih pisang, dan (4) mutu benih pisang aksesi Klutuk NTT dan Sumatrana setelah disimpan. Hasil percobaan menunjukkan bahwa Karakterisasi morfologi benih pisang SPN 001, LNT 001, DMS 001, Microkarpa, SGR 001, Musa balbisiana aksesi Klutuk NTT, Musa acuminata aksesi Sumatrana memiliki diameter benih berkisar antara 4-6.6 mm. Karakterisasi anatomi benih pisang aksesi SPN 001, LNT 001, DMS 001, Microcarpa, SGR 001, Musa balbisiana aksesi Klutuk NTT, dan Musa acuminata aksesi Sumatrana memiliki bagian yaitu kulit benih, endosperm, embrio, mikrofil, integumen dalam dan luar, chalazal, dan operkulum. Embrio benih pisang berbentuk huruf T terbalik. Metode uji daya berkecambah benih pisang liar dilakukan dengan pengamatan pertama hari ke-16 dan pengamatan kedua hari ke-26 setelah tanam. Metode uji dengan cahaya penuh (100%) dan kelembaban media 70-90% pada aksesi SPN 001 dan LNT 001 menghasilkan daya berkecambah 70.80-88.80%. Metode uji dengan cahaya rendah (50%) dan kelembaban media 90% pada aksesi Microcarpa, DMS 001, dan SGR 001 mengahasilkan daya berkecambah 4.00-42.40%. Mutu benih pada peubah kadar air, daya berkecambah, indeks vigor, dan keserempakan tumbuh pada aksesi Klutuk NTT mengalami peningkatan setelah disimpan dan pada aksesi Sumatrana mengalami penurunan viabilitas benih setelah disimpan 41 bulan. Daya berkecambah pada benih aksesi Klutuk NTT yang telah disimpan selama 41 bulan sebesar 79.2% dan daya berkecambah pada benih aksesi Sumatrana yang telah disimpan selama 5 bulan memiliki daya berkecambah sebesar 97.6%, sedangkan benih yang telah disimpan selama 41 bulan sebesar 18%., Low germination, high variability of germination, and the absence of germination test methods are obstacles in banana seed germination. The purpose of this research is to learn about the morphological and anatomical characterization of banana seeds from several accessions, and test the development of germination test methods to obtain the proper test method and determine the quality of banana seeds to determine the viability and vigor of seeds that have been stored. The research consisted of four experiments, that is (1) morphological and anatomical characterization of seeds of several wild banana accessions, (2) determination of the first count and final count in the banana seed germination test method, (3) development of a germination test method for five banana seed accessions, and (4) quality of banana seeds of Klutuk NTT and Sumatrana accessions after storage. The results of the experiment showed that the morphological characterization of banana seeds SPN 001, LNT 001, DMS 001, Microcarpa, SGR 001, Musa balbisiana accession Klutuk NTT, Musa acuminata accession Sumatrana had a seed diameter ranging
Keyword: cahaya, kelembaban, true seed, viabilitas, vigor

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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