Judul: Optimasi pengembangan perikanan cakalang di Kabupaten Lombok Timur Provinsi Nusa Tenggara Barat
Abstrak: Skipjack tuna is one of Indonesia's export commodities that can be relied upon from the fisheries sector right after shrimp and tuna. In addition, skipjack tuna is one of main target species in fisheries bussiness. Therefore, fishing fleet and the production of skipjack tuna is increasing every year. However, the production of skipjack tuna in East Lombok District has decreased over the last 5 years but the skipjack tuna fishing fleet has increased. Based on that fact, it is necessary to conduct research on the optimization of the development of skipjack tuna fisheries in East Lombok District. The purpose of this study are to describe the skipjack tuna fishing unit, to identify the status of skipjack tuna resources, to analyze the financial feasibility for the skipjack tuna fisheries business, to determine the optimal allocation of skipjack tuna’s fishing units, and to formulate a development strategy in East Lombok District. The methodology used in this research is descriptive analysis, analysis of stocks of fish resources, financial feasibility analysis, optimization analysis, and SWOT analysis. The results showed that the fishing gear used to catch skipjack tuna in East Lombok District is troll line. It is indicated to experience a fishing pressure. Therefore, there should be a reduction in the number of troll line fishing units in the district for 108 units, which will be 890 units. Based on the analysis of feasibility, it is provided information that the skipjack tuna fishing business profitable and feasible. Furthermore, there are skipjack tuna fisheries development strategies in East Lombok District namely: the optimization of skipjack tuna utilization opportunities; rationalization of skipjack tuna fishing unit number; training the fishermen about the handling of the catch; institutional improvements to improve the bargaining position of fishermen; maximize the chances of skipjack tuna commodity markets; diversification types of skipjack tuna processing.
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Judul: Suatu studi tentang prospek perikanan tuna dan cakalang di perairan Indonesia bagian timur
Abstrak: Perairan Indonesir Bagian Timur yang terletak pada posisi 05°00'N -15°00'S; 115°00' 140°00'E merupakan fishing ground yang baik bagi beberapa jenis tuna dan cakalang. Selama periode tahun 1970 1975 hook rate berbagai jenis tuna, billfish dan spearfish di perairan ini bergerak antara 2,05 2,88% dengan nilai rata-rata - 2,37% per tahun. Nilai hook rate cenderung membesar kearah fishing ground di sebelah timur perairan ini dan kearah katulistiwa. Dibandingkan dengan nilai hook rate tahun 1961 1964 sebesar 3,06% per tahun, hook rate pada tahun 1970 1975 turun sebesar 22,55%, sedang bila dibandingkan dengan nilai hook rate pada tahun 1931 1933 sebesar 8,93% per tahun turun sebesar 73,46% atau turun rata-rata 1,75% per tahun. Hal ini berarti terhadap tuna di perairan ini telah terjadi lebih-tangkap (over exploitation) dan berada pada keadaan yang kritis. Agar perairan ini tetap dapat dieksploitasi secara menguntungkan selama jangka waktu yang panjang, perlu adanya perimbangan antara jumlah kapal yang beroperasi dengan potensi tuna di perairan ini. Jumlah kapal yang dianggap sesuai bagi daerah ini diperkirakan 69 kapal per tahun dari kelas 50 GT atau 43 kapal per tahun dari kelas 100 GT. ...
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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