Judul: The Population and Productivity of Native Duck in Two Village with a Different Topography in Cianjur Frefecture.
Abstrak: Duck breeding is one of the community animal breeding wliich normaly could be found at paddy field area or swamps. The breeding system is a herding system that passed on from ancestor to the youngsters which cause limitation on farmer skill and knowledge of raising duck. This study goals is to obtain the information of native duck population, breeding system, and productivity in two village which lies on the same Cianjur river strem area with different topography.
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Judul: Kajian Produktivitas dan Fertilitas Itik Cihateup.
Abstrak: Cihateup duck is a primary duck of West Java that has been known as layer duck. It was lived at high land on cool temperature and mostly found is Tasikmalaya and Garut regency. This duck has not been known about of its biological characteristics yet. The aim of this research was to obtain information of production performance of Cihateup duck, which can be used as a reference for the animals development. Twelve female, 5 males ducks from Tasikmalaya regency and 31 females, 19 males ducks from Garut regency were used in this research. Commercial diet with 16% crude protein was given to the experimental animals. Water and feed were provided ad libitum. The data characteristic of production and fertility were analyzed with t-test by minitab release 13.20. Ratio of male duck and female duck was analyzed with X2 test. Correlation between production and fertility was analyzed with regretion by SAS 6.12. The result showed that Cihateup ducks are potential to be layer type. Perform of production that consist maturity age showed earlier. Average og body weight maturity of Cihateup ducks were 1 500-1 550 g. Peak production of Cihateup ducks were occured at third week (81.05±2.21 %) with potential production upper 60 %. Width of pubic bones Cihateup duck was 6 cm. Reproduction performs could be estimated from number of ova (772.17±663.60 eggs). The result showed that both of ducks had high potential egg production. Fertility of ducks were high, and there were similarity of male and female DOD. There were correlation between production and reproduction in Cihateup duck. This correlation values could be used to estimate production by reproduction traits.
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Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition