Judul: Studi Tentang Pengaruh Berbagai Faktor Input Terhadap Hasil Tangkapan Purse Seine di Pekalongan
Abstrak: Pekalongan merupakan salah satu basis perikanan terbesar dan terpenting di Pulau Jawa. Sebagian besar produksi perikanan laut dihasilkan dari kegiatan perikanan di Pekalongan. Purse seine adalah salah satu jenis alat tangkap yang digunakan oleh nelayan di Pekalongan. Tujuan penelitian ini adalah mempelajari perkembangan penangkapan ikan dengan purse seine di Pekalongan, menenhikan model produksi yang dapat menggambarkan hubungan antara hasil tangkapan dengan faktor input dan mengungkapkan berbagai pengaruh faktor input: ukuran kapal (XI), tenaga mesin (X2), bahan bakar minyak (X3), panjang jaring (X4), lamanya oprasi (X5), tenaga kerja (X6) terhadap hasil tangkapan.
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Judul: Pengukuran efisiensi teknis perikanan purse seine di Pekalongan
Abstrak: Para para pelaku usaha perikanan purse seine di utara Jawa terus mengembangkan baik sistem maupun teknik penangkapannya untuk mempertahankan usahanya. Akhir-akhir ini, pengelolaan kapasitas penangkapan ikan berikut metoda pengukurannya sudah menjadi isu penting (isu tentang kapasitas berlebih dan penangkapan berlebih) merupakan masalah serius yang dihadapi dalam pengelolaan sumberdaya pelagis kecil di Laut Jawa dan sekitarnya. Kajian pengelolaan perikanan ber6asis kapasitas penangkapan merupakan alternatif pendekatan guna mengendalikan faktor-faktor input yang tidak efisien yang digunakan dalam usaha penangkapan.
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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