Judul: Potensi dan Tingkat Keragaman Hijauan Pakan Domestik Berdasarkan Ketinggian Kawasan dalam Mendukung Usaha Peternakan Sapi di Kabupaten Malang
Abstrak: Malang Regency has an area from the coast up to the mountains and became one of centers the cattle farm in East Java with the patterns of forage availability depending on natural grass. The aim of this experiment were to analyze the potential diversity, habitat vegetation and the characteristics of availability on different altitude of areas. This experiment used survey method and observation with descriptive analysis, composition of botany, and diversity analysis. The results showed that altitude of areas increased the capacity of grass cutting, granting of forage, land productivity, and forage species. The composition of forage in Bandungrejo village was predominantly Paspalum conjugatum Berg. 16.92%, in Ngembal village was Digitaria nuda Schuamcher. with 20.08%, and Gubug Klakah village was Ageratum conyzoides L. 20.43%. The similarity index between Bandungrejo and Ngembal villages was 31.58%, Ngembal and Gubug Klakah village as 27.91%, while Bandungrejo and Gubug Klakah village as 25.64%.
Keyword: forage diversity, composition of botany, cattle, altitude

Judul: Analisis Potensi dan Pemanfaatan Hijauan Pakan pada Peternakan Domba Rakyat Desa Randobawa Ilir Kecamatan Mandirancan, Kabupaten Kuningan, Jawa Barat
Abstrak: Randobawa ilir is one of the villages in Kuningan Regency where found sheep breeding farm. The aim of this experiment was analyzing potential and utilitazion of forage on sheep breeding farm in Randobawa Ilir village as a feed of ruminant forage. This experiment used descriptive analysis, composition botany analysis, analysis of carrying capacity, and diversity analysis. The results of composition of botany showed that the first rank of forage was Eragrostis sp. as many as 14.01%, the second was Digitaria sp. as many as 9.96%, and the third was Mikania micrantha H.B.K. as many as 9.90%. The result of analysis of carrying capacity showed that Randobawa Ilir village still allowed for addition of livestock as many as 129.39 AU. The result of diversity analysis showed that diversity on paddy field higher than farm. The highest importance value on paddy field was Cynodon dactylon L. Pers. as many as 31.53% and the highest importance value on farm was Oplismenus burmannii (Retz.) P. Beauv as many as 68.64%.
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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