Judul: Sistem Penyediaan Benih dan Teknologi Invigorasi untuk Mendukung Ketersediaan Benih Kedelai Bermutu di Provinsi Banten
Abstrak: Research divided into two sub researches. Research 1: Soybean seed system in Banten Province. The aim of research 1 was to study soybean seed availability system in Banten Province. Research 2: Invigoration technology to improve seed vigour, plant growth and yield of soybean. The aim of research 2 was to get and to apply invigoration technology to improve seed vigour, plant growth and yield of soybean. Result of research 1 showed that soybean seed system in Banten Province has used Jabalsim pattern with some modification. Result of SWOT analysis showed position of the system was in 1st quadrant with aggressive strategy as best strategic planning: (1) improving knowledge of seed growers in producing seed, maintaining and improving quality of the seed produced by providing extension service and training, and supervising by Seed Supervising and Certification Office (BPSB); (2) making legal corporation (MoU) between seed growers and PT SHS; and (3) increasing seed production to fulfill the demand of soybean seed. In order to fulfill the need of soybean seed in Banten Province, Jabalsim pattern can be used with better seed production planning by empowering local seed growers. Map of center production area and plan of planting can be helpful to make better seed production planning. Result research 2 showed that matriconditioning using powder of burned rice hull plus commercial Rhizobium inoculant improved seed viability and vigour. This invigoration treatment also improved plant growth and yield by increasing effective nodules, filled pod, yield per plant, yield per plot and potential of yield better than control. Seed invigoration treatment before planting did not influence quality of the seed produced. Seed invigoration using matriconditioning plus Rhizobium should be recommended to be applied by seed growers in order to improve soybean seed quality and to increase soybean production in Banten Province.
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Judul: Peningkatan Kinerja dan Produktivitas Hijau Rantai Pasok Kedelai di Provinsi Banten.
Abstrak: Soybean supply chain performance and productivity are two things that continuously needs to be evaluated and improved by relevant stakeholders. The aim of this research was increasing the performance and productivity while at the same time applied environmental approach to achieve the sustainable production. The performance analysis was conducted based on the supply chain operations reference (SCOR) and measurement integration with data envelopment analysis (DEA). Green productivity was measured using green productivity indexing (GPI) method. The performance indicated the value for upstream and downstream sectors respectively at 69.75 and 88.50. The productivity measurement obtained GPI values on the upstream and downstream sectors, respectively for 11.38 and 0.12. Strategic alternatives were raised against the both of units sector developed by expert opinion. analytical hierarchy process (AHP) were used to synthesize expert opinion. The alternatives chosen based on green productivity approach and expert opinions is the use of straw to block the weed with weights 0.35 for the upstream sector and the strategy of using local soybean with weights 0.33 for the downstream sector. The strategies were simulated to the downstream sector can increase up to 14.76 GPI. Simulation of alternative strategic in the downstream sector was not in line with expert opinion. The highest yield increase of GPI occupied by the use of waste water alternative with GPI value 0.38.
Keyword: AHP, GPI, green productivity, SCOR, soybean

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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