Judul: Potensi metode klasifikasi linear sebagai pengukur produktivitas sapi perah di Kecamatan Lembang
Abstrak: The aim of this study is to determine the potency of linear classification method for predicting measurement level of milk production in dairy cattle. Total of 98 dairy cows in Lembang was involved in this research. The measurement on linear classification include 7 traits, i.e., teat length, fore udder attachment, front teat placement, udder depth, rear udder height, central ligament, and rear teat position. The results were categorized in 3 scales. To explore the potency of linear classification method as predictor of milk production, the sampling were conducted on milk production yielded level lactation period. The data was analysed descriptively and the correlation between the 7 traits and milk production was calculated. The result showed that most of linear classification was categorized as middle scales. The significant correlation (p<0.05) between linear classification and milk production was only found in fore udder attachment (r=- 0.269), udder depth (r=-0.283), and central ligament (r=0.234). This study shows that classification of linear potential as a measure of the productivity of dairy cows, but need to study with observations on the same animal during lactation to reinforce this hypothesis.Key words: linear classification, milk production.
Keyword: klasifikasi linear, produksi susu

Judul: Penerapan Fungsi Diskriminan dalam Deteksi Dini Penentuan Status Mastitis Subklinis pada Sapi Perah (Studi Kasus : Kawasan Usaha Ternak Cibungbulang, Kabupaten Bogor Tahun 2010-2011)
Abstrak: Discriminant analysis is one of the multivariate analysis are used to classify objects into groups based on a set of variables. Mastitis is a major problem the dairy farm business because it can decrease milk production in large quantities. Preventive measures can be done using the techniques of early warning of mastitis, mainly for subclinical mastitis disease. The purpose of study is to estimate a model of early warning of subclinical mastitis in dairy casbased on the composition of somatic cells in the colostrum by using discriminant analysis and determine the types of somatic cells is most effective in the estimation model. The results obtained a model of early warning of subclinical mastitis in dairy cows based on the composition of somatic cells in the colostrum to the discriminant function, as follows: 􀜦 = −79.452+ 1.666 􀜮􀬵 − 0.766 􀜮􀬶 − 2.398 􀜮􀬷 + 2.021 􀜮􀬸 + 1.361 􀜮􀬹 +1.359 􀜮􀬺 + 1.691 􀜰􀬵 + 0.333 􀜰􀬶 − 1.714 􀜰􀬷 + 0.489 􀜰􀬸 + 0.119 􀜰􀬹 +0.099 􀜰􀬺 with test of sensitivity and specificity of each worth 97.5% and 100%. The best variable could classify the status of subclinical mastitis in dairy cows is L6 (the percentage composition of lymphosyit cell content of colostrum during 6th day) with the value of sensitivity and specificity respectively by 80% and 100%.
Keyword: 

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