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: 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