Judul: Pengaruh Taraf Kombinasi Rumput Gajah dan Limbah Tauge sebagai Alternatif Sumber Serat terhadap Kualitas Fisik Pellet Kelinci Selama Penyimpanan.
Abstrak: Sprouts waste (SW) is an alternative materials which potentially replace elephant grass (EG) as a source of fiber on feed. This study aims to test the physical quality of pellets for rabbit which contains SW and EG as a source of fiber with different storage periods. This study was arranged in a Completely Randomized Design Factorial (4x4), contains factor A: sprouts waste levels (P0 = 15% EG + 85% concentrate, P1 = 10% EG + 5% SW + 85% concentrate, P2 = 5% EG + 10% SW + 85% concentrate, and P3 = 15% SW + 85% concentrate), and factor B: storage periods (0, 2, 4, 6 weeks). Data were analyzed with analysis of variance (ANOVA) and followed by Duncan test. The results indicated that the combination level of SW and EG very significantly increased the particle size, durability, and also decreased the bulk density and compacted bulk density (P<0.01). P2 showed the best physical quality because it had a high particle size, required medium storage space with the highest durability and decreased feed price. The storage periods very significantly decreased the physical quality of pellets (P<0.01). In this study, there was an interaction between treatments on spesific density and bulk density
Keyword: Bogor Agricultural University (IPB), storage, sprouts waste, physical quality

Judul: Substitusi Rumput Gajah dengan Limbah Tauge dalam Ransum Bentuk Pellet terhadap Performa dan Nilai Komersil Kelinci Jantan Lokal persilangan.
Abstrak: Alternative feed rations to reduce the use of commercial waste are sprouts. This study aimed to compare the performance of local male rabbits fed by complete sprouts waste pellet shaped to substitute the use of elephant grass. This study used a completely randomized design with 4 treatments and 4 repetitions. There were 16 local male rabbits aged 2 months with an average live weight 879.375 + 60.874 g head-1. Treatments consisted of P0 = 15 % of elephant grass + 85 % of concentrate, P1 = 10 % elephant grass + 5 % of sprouts waste + 85 % concentrate, P2 = 5 % of elephant grass + 10 % sprouts waste + 85 % concentrate, P3 = 15 % of sprouts waste + 85 % concentrate. Data were analyzed by analysis of variance (ANOVA). The results showed that the use of waste to the extended 15 % of sprouts waste pellets could substitute the usage of elephant grass and reduce the price of feed to give a good performance on the local male rabbits. Daily weight gain of rabbits given pellet P2 and P3 is 18.954 to 19.785 g day-1 with a final body weight greater than P0 and P1. The highest pellet consumption is the treatment of P2 and P1, the consumption of P3 pellet treatment is not too high and shows the average final body weight better than others. It also could decrease the cost.
Keyword: sprouts waste., performance, Pennisetum purpureum, pellets, local male rabbits

Judul: Invers Drazin dari Matriks Toeplitz Singular
Abstrak: Matriks Toeplitz adalah matriks yang setiap unsur pada diagonal utama bernilai sama dan setiap unsur pada subdiagonal yang bersesuaian dengan diagonal utama juga bernilai sama. Matriks singular adalah matriks yang tidak bisa ditentukan inversnya. Akan tetapi, dapat diupayakan untuk ditentukan inversnya menggunakan invers matriks yang diperumum. Invers Drazin merupakan salah satu jenis invers matriks yang diperumum. Pada karya ilmiah ini ditentukan invers Drazin dari matriks Toeplitz singular dengan menggunakan metode Leverrier Faddeev. Kemudian, ditentukan invers Drazin dari matriks Toeplitz singular yang direpresentasikan sebagai penjumlahan segitiga bawah dan segitiga atas matriks Toeplitz berdasar pada teorema Gohberg dan Semencul., Toeplitz matrix is a matrix in with element on the main diagonal has the same value and on the subdiagonal corresponding to the main diagonal also has the same value. Singular matrix is a matrix that has no inverse. However, it can be attempted to determine the inverse using a generalized inverse matrix. Inverse Drazin is a type of generalized matrix inverse. This paper discussed the inverse Drazin for a singular Toeplitz matrix using the Leverrier Faddeev method. Then, the Drazin inverse of the singular Toeplitz matrix which is represented as a sum of products of lower and upper triangular Toeplitz matrix based on Gohberg and Semencul theorem.
Keyword: inverse Drazine, singular Toeplitz matrix