Judul: Penambahan Minyak Biji Bunga Matahari pada Ransum Induk Domba terhadap Kecernaan Zat Makanan dan Komposisi susu.
Abstrak: A study was conducted using sheep to observe and to evaluate the quality of ration with different sunflower seed oil on digestibility nutrients and milk composition. This study used Completely Randomized Design (CRD) with 4 treatments, ie P0 (without the addition of sunflower seed oil or control), P1 (the addition of sunflower seed oil at 2%), P2 (the addition of sunflower seed oil at 4%), P3 (the addition of sunflower oil at 6%) and 3 replications. The data obtained from the study were analyzed using analysis of variance (Analysis of Variance/ANOVA) and when the result of the analysis showed significant differences, it will be followed by Ortogonal Polynomial Test. The result showed that the treatments did not significantly effect (P>0.05) nutrient digestibility, total digestibility nutrient, absorpstion minerals (Ca and P) and milk composition. The treatments significantly effect (P<0.01) fat intake. The addition of 6% sunflower oil has not affected the digestibility of nutrients and milk composition
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Judul: Pengaruh Penambahan Minyak Biji Bunga Matahari pada Ransum Induk Domba Laktasi terhadap Fermentabilitas Rumen
Abstrak: This research was conducted to evaluate the effect of sunflower seeds oil (SFO) addition into lactating sheep’s diet, on rumen fermentability. There were 12 lactating sheep, aged 1-year-old, treated for 10 months experiment. The experiment was arranged with 4 treatment diets i.e. P0 = control (with no addition of SFO), P1 = rations with 2% SFO addition, P2 = rations with 4% SFO addition, P3 = rations with 6% SFO addition. Each treatment was done with 3 replication. The result showed that the addition of sunflower seeds oil produced the population of bacteria ranged from 5.46 x 109 cells ml-1 to 6.74 x 109 cells ml-1 and the population of protozoa ranged from 6.13 x 104 cells ml-1 to 9.87 x 104 cells ml-1. the concentrarion of VFA ranged from 83.94 mM to 98.59 mM and concentration of NH3 ranged from 2.38 mM to 5.47 mM. The energy efficiency was also positively affected, based on the lower amount of methane production. It is concluded that the addition of sunflower seed oil (SFO) to 6% do not affect the rumen fermentability, microbial populations and is able to reduce the production of methane gas.
Keyword: sunflower seeds oil., microbe rumen, fermentability

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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