Judul: Analisis kelayakan finansial usaha budidaya tambak udang windu (Penaeus monodon) di desa Pantai Bahagia, kecamatan Muara Gembong, kabupaten Bekasi
Abstrak: Udang windu merupakan komoditi perikanan yang memiliki nilai ekonomi yang sangat tinggi dan berorientasi ekspor. Salah satu desa yang memiliki potensi perikanan budidaya tambak/payau udang windu di Kecamatan Muara Gembong, Kabupaten Bekasi adalah Desa Pantai Bahagia.
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Judul: Analisis finansial usaha tambak udang windu (Penaeus monodon Fab.) di desa Karangsong, Kecamatan Indramayu, Kabupaten Indramayu, Jawa Barat
Abstrak: Penelitian ini bertujuan untuk mengetahui tingkat keberhasilan usaha tambak udang windu di Desa Karangsong ditinjau dari tingkat kelayakan usaha, berapa lama waktu pengembalian modal investasi dan faktor yang mempengaruhi pen- dapatan bersih atau keuntungan usaha. Metode penelitian yang digunakan adalah metode sensus. Data yang diambil berasal dari semua petani pemilik sekaligus penggarap (10 orang) tambak udang windu (Penaeus mono don Fab) di Desa Karangsong, Kecamatan Indramayu. Metode analisis yang digunakan adalah analisis pendapatan/keuntungan usaha serta analisis imbangan penerimaan dan biaya (Revenue-Cost Ratio) untuk satu tahun usaha. dangkan untuk mengetahui kemungkinan pengembangan usaha, analisis dilakukan berdasarkan kriteria Net Present Value (NPV), Internal Rate of Return (IRR), Net Benefit-Cost Ra- tio (Net B/C) dan Payback Period. Sedangkan untuk mengetahui faktor yang mempengaruhi pendapatan/keuntungan usaha digunakan regresi linier berganda yang kemudian dilakukan ujit T dan uji F.
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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