Judul: Potency of The Development of Buffalo in Bojong and Cibunar Village of Garut Regency.
Abstrak: In the development of livestock in Garut Regency, it is important to understand factors influencing its improvement including land use, feed availability, environment, animals, and social cultural of the local farmers. The aim of this study was to assess the potency of buffalo development in two villages of Garut namely Bojong and Cibunar. Each village has its own characteristics as follow Bojong is located at the altitude of 1100 m above sea lives with greater area of rice fields, and mechanization has been existed in the village; where as Cibunar is located at the altitude of 600 In above sea level, and buffalo are mostly used as draught animal for ploughing rice fields.
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Judul: Analisis Reproduksi dan Potensi Kerbau di Kecamatan Cikalongkulon Kabupaten Cianjur
Abstrak: Cikalongkulon district has potential to develop buffaloes business because this region widely used for rice fields and plantations. The purpose of this research was to analyze the performance of buffalo reproduction, potential improvement, and farmer’s income from buffalo business. Buffalo reproduction performance known by doing interviews, the results that obtained were: 2.32+0.73 years old for the first puberty, 2.53+0.70 years old for the first conception, 3.47+0.72 years old for the first calving, 54.23+30.62 days period of estrous cycle, 4.00+3.89 hari days of estrous cycle, 11.95+0.20 months of gestation time, estrous and conception after 4,00+3.89 months partus, and 1.96+0.47 months of calving interval. Population of buffalo can still be improved, according to Capacity of Additional Ruminant Population (CARP) value of Cikalongkulon district as much as 121.49 AU. Farmers that own buffalo by themselves received the highest income, especially in scale 6-10 head. The highest income is Rp23.793.500.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4