Judul: Model Optimasi Teknis Unit Penangkapan Purse Seine di Pengambengan Kabupaten Jembrana, Bali
Abstrak: Pengambilan data dilakukan pada tanggal 15 Mei sampal 28 Juli 1991 dengan metode survey. Tujuan penelitian adalah untuk mempelajari usaha unit penangkapan purse seine di Pengambengan, Kecamatan Negara, Kabupaten Jembrana, Propinsi Bali serta mengetahui hubungan faktor-faktor produksi dan produksi pada unit penangkapan dengan purse seine tersebut. Model produksi didekati berdasarkan persamaan regresi linier berganda. Yang merupakan variabel tidak bebas adalah jumlah hasil tangkapan (Y). Sedangkan variabel bebas terdiri dari ukuran perahu (X1), panjang jaring (X2), lebar jaring (X3), kekuatan mesin (X4), tenaga kerja/ABK (X5), bahan bakar (X6) dan trip (X7)...
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Judul: Optimasi faktor-faktor produksi armada purse seine di pelabuhan perikanan pantai eretan wetan, Indramayu
Abstrak: Salah satu unit penangkapan yang efektif digunakan untuk menangkap ikan pelagis di Laut Jawa adalah purse seine. Purse seine yang umum digunakan dalam usaha penangkapan di Eretan Wetan adalah purse seine dengan alat bantu lampu dan rumpon. Penelitian ini menerapkan metode survey dengan pengumpulan data menggunakan metode purposive sampling. Tujuan dari penelitian ini adalah untuk : membuat model fungsi produksi unit penangkapan purse seine, mengestimasi efisiensi besaran cahaya yang optimum, mengidentifikasi kelayakan usaha penangkapan purse seine di PPP Eretan Wetan.
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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