Judul: Pengembangan padi gogo indica toleran kekeringan melalui transformasi genetik gen regulator HD-Zip Oshox6 dan seleksi populasi padi yang mengandung marka genetik QTL 12.1, Development of drought tolerance upland indica rice by genetic of HD-Zip oshox6 regulator gene and through selection  on rice population harboring genetic marker QTL 12.1
Abstrak: Pada tahun 2009, konsumsi beras Indonesia mencapai 139 kg per orang per tahun melebihi rata-rata dunia (60 kg per orang per tahun). Dengan laju pertumbuhan penduduk rata-rata 1,4% per tahun, kebutuhan beras Indonesia pada tahun 2030 mencapai 44 juta ton. Kebutuhan yang demikian besar tanpa diimbangi oleh produksi dikhawatirkan akan menyebabkan kerawanan pangan. Tuntutan produksi yang besar tidak terlepas dari berbagai permasalahan yang menyebabkan produktivitas padi menurun. Permasalahan tersebut antara lain penyempitan areal lahan sawah, sumber air berkurang, dan perubahan iklim ekstrim akibat pemanasan global. Fenomena perubahan iklim ekstrim antara lain kemarau panjang yang menyebabkan cekaman kekeringan., Drought is the main factor affecting rice productivity in sub-optimal dryland. Therefore, a drought tolerance upland rice cultivar is needed for extensification purposes. Two approaches to generate drought tolerance rice plants have been carried out in this research. First a genetic transformation and the second is selection for drought tolerance on rice population harboring genetic marker qtl 12.1 in the field.
Keyword: Upland rice, Marker selection, Transgenic, Oryza sativa, Cauliflower Mosaic Virus

Judul: Over-expression of OsDREB1A gene for improvement of drought tolerance on rice.
Abstrak: Drought is a major factor that influence the growth and productivity of rice. Drought tolerant rice varieties are needed to increase rice production. Development of improved rice varieties can be done through classical breeding and genetic transformation. The research objective was to obtain rice plants containing the construct 35S::OsDREB1A. Agrobacterium tumefaciens mediated transformation of rice cv. Nipponbare using OsDREB1A gene under the control of CAMV 35 promoter produced 81 putative transgenic rice plants (T0) positively containing the transgene based on PCR analysis. The plant height, panicle number, panicle length, and the grain number of transgenic plants were in general lower than the Nipponbare wild type. T1 seeds from selected genotypes were screened for hygromycine resistence, and rice seedlings were evaluated for tolerance to drought stress in the glasshouse, based on the standard evaluation system for rice (IRRI 1996). Five independent transgenic rice plants were identified to be tolerant to drought stress. Molecular characterization using Southern hybridization showed that these plants had 2- 4 copies of transgene. Physiological analysis showed that the drought avoidance is the possible mechanism of adaptation to drought of the transgenic plants. The drought tolerant transgenic plants were crossed to Indonesian elite rice cultivars (Ciherang, Batutegi, Code, and Konawe). Glasshouse evaluation showed that F1 transgenic plants derived from cultivars Batutegi, Code, and Konawe were more tolerant to drought than their wild-type counterparts. F1 transgenic plants were backcrossed into corresponding elit rice cultivars, and PCR analysis showed that those plants contained the transgene. These results showed that 35S::OsDREB1A could be transferred and inherited to elite rice genotipes through crossing. The new drought tolerant germplasms generated in this research can be useful materials for breeding program for improvement of drought tolerance on rice in Indonesia.
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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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