Judul: Analisis gaya berat dan gaya apung pada keramba jaring apung PT. Nuansa ayu karamba di Kepulauan Seribu Jakarta
Abstrak: Keramba jaring apung (KIA) mempakan salah satu budidaya laut yang ddmapkan dapat selalu memenuhi kebutuhan stok ikan. KJA terdiri dari jaring, drum besi atau plastik, kayu, tali bamby besi dan dilengkapi dengan sistem penjangkaran. Bagian-bagm ini akan menghasilkan gaya berat kecuali drum besi atau plastik yang akan mengalami gaya apung. Gaya berat dan gaya apung sangat mempengaruhi keseimbangan dari KJA. Penelitian ini bertujuan untuk menganalisis gaya apung dan gaya berat pada KJA PT. Nuansa Ayu Karamba di Kepulauan Seribu Jakarta Metode yang digunakan dalam penelitian ini adalah metode studi kasus dan dianalisis secara teknis.
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Judul: Analisis Teknis Jaring Apung di Danau Lido, Kabupaten Bogor, Jawa Barat
Abstrak: Kegiatan usaha perikanan darat dilakukan melalui kegiatail penangkapan di perairan umum dan kegiatan budidaya. Beberapa jenis kegiatan budidaya air tawar adalah budidaya ikan pada kolam air tenang, kolam air deras, keramba, dan jaring apung. Budidaya ikan dalam jaring apung semakin diminati karena kemudahan dalam pemeliharaan ikan, pemanenan, pengontrolan, selain itu investasi yang relatif terjangkau. Konstruksi jaring apung menggunakan besi dan bambu sebagai kerangka, drum sebagai pelampung, dan untuk pemberat digunakan batu, beton atau jangkar besi. Ketepatan penggunaan pemberat dan pelampung sangat mempengaruhi keseimbangan pada konstruksi keramba. Untuk itu diperlukan penghitungan teknis mengenai konstruksi keramba.
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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