Judul: Analisis keragaan ekonomi rumahtangga petani peserta dan non-peserta rice estate di lahan pasang surut delta telang I kabupaten banyuasin sumatera selatan
Abstrak: Lahan pasang surut mempunyai potensi untuk dikembangkan sebagai lahan penghasil padi. Maka Pemda Sumatera Selatan, Pemkab BAnyuasin dan BULOG membuat sebuah pilot-project bernama "RiceEstate" yaitu usahatani padi seluas 1000 ha pada lahan pasang surut di Delta Telang I, Kab. Banyuasin. Proyek ini memberikan bantuan pinjaman modal, penyewaan alsintan, penampungan hasil produksi dan pendampingan.
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Judul: Analisis Ekonomi Sumberdaya Lahan Usahatani Padi Sawah untuk Mendukung Pertanian Pangan Berkelanjutan di Kabupaten Garut
Abstrak: The main objective of this research is to develop sustainable rice farming systems in Kabupaten Garut based on land capability. Each farming system has different input-output structures. The study showed that 57,91% of total paddy area was conducted on unsuitable land. Such a system needs higher inputs and influences the farmers’ income. The efficiency report showed different results based on the applied approach, either constant return to scale (CRS) or variable return to scale (VRS). The average efficiency score of rice farming systems using VRS approach was higher than using CRS approach for both land capabilities, i.e. 72-83%. This score range means that technically those farming systems had excess capacity between 17-28%. Land productivity change of rice farming system estimated by monetary valuation showed that on suitable land occurred appreciation, while on unsuitable one occurred depreciation. The result of feasibility analysis showed that the rice farming system on suitable land was feasible to be conducted, while on unsuitable one was unfeasible. The value of producer surplus of rice farming system on suitable land was higher than on unsuitable one. The result of optimization analysis showed that there were some areas in 7 sub-districts better not to produce rice since inefficient to be carried out, i.e. Kecamatan Kadungora, Pameungpeuk, Samarang, Banjarwangi, Cisewu, Talegong and Cikelet.
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell