Judul: Pendugaan model fungsi produksi dan analisis efisiensi usaha penggemukan domba (studi kasus di peternakan domba tawakkal desa Cimande Hilir, kecamatan Caringin, kabupaten Bogor)
Abstrak: The fattening sheep farming is most profitable husbandry enterprise. The most important reason are, it only used a little capital and fastest to get break even point. The aim of fattening program is to get growth of body weight level and the production function model is an effective way to know it. In Tawakkal sheep farming, the best production function model that can be used is Cobb-Douglas mood.
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Judul: Analisis Efisiensi Produksi Usaha Penggemukan Domba Tawakal Farm Caringin Bogor pada Asal Daerah Bakalan yang Berbeda
Abstrak: This research is aimed to analyze the efficiency of sheep fattening production at Tawakal Farm, Caringin, Bogor. This research used three treatments with eight replication. The treatment was devided by the origin of the sheep’s seeds, which was the local sheep from Cicurug (West Java), Jampang (West Java), and Temanggung (Central Java). The sheep were given Brachiaria humidicola and tofu waste as feed. Average daily gain (ADG) and feed efficiency were observed. The result showed that sheep from Temanggung got the highest value of ADG (100.919±6.949 g/sheep) and the highest value of feed efficiency (0.113±0.008/sheep). The calculation of income analysis showed that the local sheep from Temanggung (Central Java) got the highest income (Rp 460 593±28 537.84/sheep) and the highest R/C ratio (1.63±0.05/sheep). In this study, the sheep from Temanggung (Jawa Tengah) which has cultivated at Tawakal Farm had the highest production efficiency.
Keyword: sheep fattening., seed origin, increasing body weight, income analysis, feed efficiency

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