Judul: Analisis finansial usaha tambak udang windu di desa Sawojajar Kecamatan Wanasari Kabupaten Brebes Propinsi Jawa Tengah
Abstrak: Adapun tujuan penelitian ini adalah untuk: mengetahui hubungan faktor-faktor finansial dengan pendapatan usaha (keuntungan); mengetahui besar tingkat keuntungan pada usaha skala kecil, skala sedang dan skala besar serta skala usaha yang paling menguntungkan (efisien); mengetahui kemungkinan pengembangan usaha tambak udang windu semi-intensif dan sensitivitas usaha tersebut jika terjadi perubahan harga output dan harga input. Metoda yang digunakan dalam penelitian ini adalah metoda studi kasus. Data diperoleh melalui pengumpulan data prizer dan data sekunder. Kemudian data ini diolah lalu dianalisa. ...
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Judul: Analisa finansial usaha budidaya udang windu di desa tanjung pasir, kecamatan telunaga, kabupaten tanggerang
Abstrak: Tujuan dari penelitian ini adalah untuk: (1) mengetahui keadaan umum usaha budidaya udang windu, (2) mengetahui besarnya keuntungan usaha budidaya udang windu dalam satu tahun, (3) mengetahui lama pelunasan modal investasi, (4) mengetahui hubungan faktor-faktor yang mempengaruhi pendapatan dan (5) mengetahui besarnya keuntungan perluasan usaha untuk waktu yang akan datang. Metode yang digunakan dalam penelitian ini adalah metode sensus untuk pengusaha budidaya udang windu dengan jumlah 5 orang responden. Analisis yang digunakan adalah: (1) Analsis: pendapatan bersih/keuntungan dan analisis imbangan penerimaan total dengan biaya total (R-C ratio) untuk satu tahun, (2) analisis payback period, (3) analisis korelasi Spearman dan (4) Analisis kriteria investasi yaitu: Net Present Value (NPV), Internal Rate of Return (IRR) dan Net Benefit Cost Ratio (Net B/C).
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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