Judul: Evaluasi Pembuatan Pakan Silase Indigofera Sp Dan Sorghum Samurai I Dengan Perbedaan Waktu Fermentasi Dan Kekuatan Vakum
Abstrak: Penelitian ini bertujuan untuk mengetahui kualitas yang dibuat dengan cara perlakuan vakum dan waktu simpan berbeda. Sebanyak 27 karung dengan isi silase yang terbuat dari campuran hijauan sorgum dan Indigofera seberat 25 kg dievaluasi kualitasnya. Perlakuan yang diberikan yaitu perbedaan kekuatan vakum yaitu vakum masing-masing dengan daya hisap 720 cm3s-1 (V1) dan 230 cm3s-1 (V2) yang dikombinasikan dengan waktu fermentasi yaitu;7 hari, 14 hari, 21 hari dan 28 hari. Setiap kombinasi perlakuan diulangi 3 kali. Uji kualitas terdiri dari analisis Proksimat dan analisis Van soest. Data organoleptik dianalisis secara deskriptif sedangkan data nutrien dianalisis menggunakan rancangan acak lengkap (RAL) faktorial 2x4, dengan ANOVA (analysis of variance) dan dilanjutkan uji lanjut Duncan. Hasil penelitian menunjukan perbedaan penggunaan kekuatan vakum dengan lama fermentasi tidak berpengaruh nyata (P>0,05) terhadap hasil nutrien yang dikandung pada silase., This study aims to determine the quality made by vacuum treatment and different storage times. A total of 27 sacks filled with silage made from a mixture of forage sorghum and Indigofera weighing 25 kg were evaluated for quality. The treatment given was the difference in vacuum strength, namely a vacuum with a suction power of 720 cm3s-1 (V1) and 230 cm3s-1 (V2) combined with fermentation time, namely; 7 days, 14 days, 21 days and 28 days. Each treatment combination was repeated 3 times. The quality test consists of Proximate analysis and Van Soest analysis. Organoleptic data were analyzed descriptively while nutrient data were analyzed using a 2x4 factorial completely randomized design (CRD) with ANOVA (analysis of variance) and continued Duncan's test. The results showed that the difference between the use of vacuum power and the length of fermentation had no significant effect (P>0.05) on the yield of nutrients contained in silage.
Keyword: Indigofera sp, Nutrien, organoleptik, silase, sorgum samurai 1

Judul: Evaluation of The Quality of  Rice Straw Silage Enriched with Indigofera Leaves and Longevity Spinach Leaf Flour
Abstrak: Penelitian ini bertujuan mengevaluasi kualitas silase jerami padi yang diperkaya daun Indigofera dan tepung daun sambung nyawa yang terdiri dari 5 perlakuan dengan 5 ulangan menggunakan rancangan acak lengkap (RAL) untuk kualitas silase, dan rancangan acak kelompok (RAK) untuk uji in vitro. Perlakuan terdiri dari T0 = jerami padi 100%; T1 = jerami padi 75% + daun Indigofera 25%; T2 = jerami padi 50% + daun Indigofera 50%; T3 = T1 + tepung daun sambung nyawa 10% (w/w); T4 = T2 + tepung daun sambung nyawa 10% (w/w). Setiap perlakuan ditambahkan dedak padi, molases, dan inokulum L. plantarum. Parameter yang diamati yaitu karakteristik fisik dan fermentatif, kandungan nutrien, fermentabilitas, kecernaan dan kinetika gas. Data diuji menggunakan ANOVA dan perbedaan nyata dilanjutkan uji Duncan. Penambahan daun Indigofera dan tepung sambung nyawa memberikan pengaruh nyata (p<0,05) terhadap kualitas silase, kandungan nutrien, kecernaan, dan kinetika gas rumen. Penambahan daun Indigofera dan tepung daun sambung nyawa mampu meningkatkan kualitas silase namun belum mampu meningkatkan kecernaan secara in vitro., This study aimed to evaluate the quality of rice straw silage enriched with Indigofera leaves and longevity spinach (Gynura procumbens) leaf flour that consisted of 5 treatments with 5 replications, using (1) a completely randomized design (CRD) for the quality of silage, and (2) a randomized block design (RBD) for the in vitro analysis. The treatments consisted of T0 = rice straw 100%; T1 = 75% rice straw + 25% Indigofera leaves; T2 = 50% rice straw + 50% Indigofera leaves; T3 = T1 + longevity spinach flour 10% (w/w); T4 = T2 + longevity spinach flour 10% (w/w). Each treatment was added rice bran, molasses, L. Plantarum inoculum. The parameters analyzed were physical, fermentative characteristics, nutrient content, fermentability, digestibility, and gas kinetics. Data were analyzed using ANOVA and significantly different treatments would be further analyzed with Duncan test. The results showed the addition of Indigofera leaves and longevity spinach flour had a significant effect (p<0.05) silage qualities, nutrient content, digestibility, and gas production. It concluded that the addition of Indigofera leaves and longevity spinach flour increased the quality of the silage but had not been able to increase the in vitro digestibility.
Keyword: Indigofera, in vitro, jerami padi, silase, tepung daun sambung nyawa, Indigofera, in vitro, longevity spinach, rice straw, silage

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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