Judul: Pengaruh substitusi jagung dengan sorgum dan menir sebagai sumber pati terhadap kualitas fisik pelet pakan broiler finisher
Abstrak: The objectiv es of this research was to evaluate different starch source in broiler ration on the physical pellet quality in continous process. This research was designed by a Completely Randomized Design with three treatments and three replicates. The treatments were P1: ration with 45% corn, P2 : ration with 35% corn + 10% shorgum, P3 : ration with 35% corn + 10% broken rice. The data were analyzed using ANOVA and significance results were analyzed by orthogonal contrast test. The parameters observed : moisture conte nt, particle size, pellet durability, and shatter test. The result showed that different starch source did not influence the particle size showed variation 6.50 mm to 6.69 mm, pellet durability showed variation 84.73% to 89.38%, shatter test showed variation 95.33% to 97.67%, but the treatments gave a very significant effect (p<0.01) on moisture content with variation 9.93% to 12.26%.
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Judul: Performance of Broiler Chicken which Feeded Ration Containing Energy Source for Corn Substitute
Abstrak: Penelitian ini bertujuan untuk mengevaluasi bahan pakan lokal sorgum, gaplek, dan sagu utuh sebagai pengganti jagung dalam ransum terhadap performa ayam broiler. Peubah yang diamati adalah bobot badan akhir, pertambahan bobot badan, konsumsi pakan, konversi pakan, dan mortalitas selama pemeliharaan pada umur 7-35 hari. Rancangan percobaan yang dilakukan adalah Rancangan Acak Lengkap (RAL) dengan 4 perlakuan yaitu ransum komersial (P0), ransum berbasis sorgum (P1), ransum berbasis gaplek (P2) dan ransum berbasis sagu parut kering (P3). Setiap perlakuan terdiri atas 3 ulangan dengan kepadatan 16-17 ekor m-2 pada tiap ulangan dengan jumlah ayam sebanyak 200 ekor. Hasil penelitian menunjukkan bahwa rata-rata bobot badan akhir, pertambahan bobot badan, dan konversi pakan berbeda sangat nyata (P<0,01) lebih rendah dibandingkan perlakuan kontrol, sedangkan konsumsi pakan tidak berbeda nyata. Performa ayam broiler pada perlakuan P1, P2, dan P3 tidak berbeda nyata. Pemberian ransum berbasis sorgum, gaplek, dan sagu parut kering sebagai substitusi jagung ransum pada ayam broiler menghasilkan performa yang lebih rendah dibandingkan pakan komersial., This study aimed to evaluate local feed ingredients such as sorghum, cassava, and whole sago as an energy source to replace on the performance of broiler chickens. The variables observed included body weight, body weight gain, feed consumption, feed conversion ratio and mortality from 7 to 35 days of age. The experimental design carried out was a completely randomized design (CRD) with 4 treatments, namely commercial ration (P0), complete ration based on sorghum (P1), complete ration based on cassava (P2), complete ration based on dry grated sago (P3). Each treatment consisted of 3 replications with a density of 16-17 m-2 in each repetition with total of 200 chickens. The results showed that the average final body weight, body weight gain, and feed conversion ratio were very significantly different (P<0.01) lower than the control treatment, while feed consumption was not significantly different. The performance of broiler chickens in treatment P1, P2, and P3 was not significantly different. The diet contain sorghum, cassava, and dry grated sago as a substitute corn in broiler chicken rations resulted in lower body weight gain compared with the commercial feed.
Keyword: broiler chickens, cassava, performance, sorghum, whole sago

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