Judul: Physical and Chemical Characteristics of Dry Grated Sago (Sapuring) as An Alternative Feed Ingredient
Abstrak: Total areal sagu di dunia adalah 6,5 juta ha dan Indonesia memiliki lahan sagu 5,5 juta ha, pemanfaatan sagu di Indonesia kurang dari 5%. Penelitian bertujuan mengkaji karakteristik fisik dan kimia sapuring sebagai bahan pakan alternatif. Penelitian menggunakan Racangan Acak Lengkap (RAL) dengan 3 perlakuan dan 3 ulangan. Perlakuan yang digunakan yaitu, utuh (P1), penyaringan mash 30 (P2), peremukan dan penyaringan mash 30 (P3). Data diuji ANOVA dilanjut uji Duncan. Parameter yang diukur yaitu sifat fisik; kerapatan tumpukan, kerapatan pemadatan tumpukan, ukuran partikel, sudut tumpukan, dan berat jenis. Sifat kimia; analisis proksimat (bahan kering, abu, protein kasar, lemak kasar, serat kasar, bahan ekstrak tanpa nitrogen), gross energy, serat kasar, dan kelarutan total. Hasil ukuran partikel pada P1 688,42 μm; P2 371,18 μm dan P3 370,81 μm. Berat jenis untuk P1 0,86 g cm-3, P2 1,11 g cm-3 dan P3 1,25 g cm-3. Analisis proksimat bahan kering 87,94-88,11%, abu 3,31-4,00%, protein kasar 2,51-3,44%, lemak kasar 0,11-0,18%, serat kasar 2,36-5,19%, dan bahan ekstrak tanpa nitrogen 76,53-78,72%. Gross energy memiliki hasil 3509-3620 kkal kg-1, kelarutan total 14,65-16,36%. Penyaringan dengan mash 30 dapat mengurangi serat kasar hingga 55%. Berdasarkan hasil penelitian, sapuring dapat dijadikan sebagai bahan pakan alternatif., The area of sago in the world is 6,5 mio ha and Indonesia has 5,5 mio ha of sago land, the application of sago in Indonesia is less than 5% of total potential. The purpose of this study was to examine the physical and chemical characteristics of sapuring as an alternative feed ingredient. The study used a Completely Random Design (CRD) method with 3 treatments and 3 replications. The treatments applied, whole (P1), sieving with mash 30 (P2), crush, and sieving with mash 30 (P3). The results were analyzed by ANOVA and continued with Duncan's test. The parameters are physical characteristics; bulk density, compact bulk density, particle size, angle of repose, and specific density. Chemical characteristics; proximate analysis (dry matter, ash, crude protein, crude lipid, crude fiber, nitrogen free extract), gross energy, crude fiber, and total solubility. The results of the physical characteristic were particle size at P1 688,42 μm, P2 371.18 μm, and P3 370.81 μm. specific density for P1 0.86 g cm-3, P2 1.11 g cm-3 and P3 1.25 g cm-3. Chemical characteristics of the proximate dry matter 87.94-88.11%, ash 3.31-4.00%, crude protein 2.51-3.44%, crude lipid 0.11-0.18%, crude fiber 2.36-5.19%, and nitrogen free extract 76.53-78.72%. Gross energy has a result of 3509-3620 kcal kg-1 and a total solubility of 14.65-16.36%. Sieving with mash 30 can reduce crude fiber until 55%. Based on the results sapuring can be used as an alternative feed
Keyword: chemical characteristic, energy source, physic characteristic, sapuring

Judul: The Effect of Physical Processing of Dry Grated Sago (Sapuring) on the Metabolic Energy Value of Broiler Chickens
Abstrak: Penelitian ini dilakukan untuk mengetahui pengaruh hasil pengolahan sagu parut kering (sapuring) terhadap kualitas biologis dalam ransum ayam broiler. Pengolahan sagu parut kering meliputi pemanenan, pemarutan, pengeringan dan pengayakan. Perlakuan yang diberikan yaitu penambahan sagu parut halus dalam ransum sebanyak 17% (25% sebagai pengganti jagung) dan 33% (50% sebagai pengganti jagung). Penelitian ini menggunakan ayam broiler jantan umur 5 minggu sebanyak 12 ekor, 9 ekor diberikan ransum perlakuan dan 3 ekor sebagai perlakuan endogenous. Penelitian dibagi menjadi 3 perlakuan dan 3 ulangan menggunakan rancangan acak lengkap, data dianalisis dengan analisis varian (ANOVA) dan dianalisis uji lanjut menggunakan Duncan. Peubah yang diukur meliputi kandungan nutrien sagu parut, RN, KcBK dan EM. Hasil menunjukkan bahwa pengolahan sapuring dengan proses pengayakan hanya menurunkan kadar serat kasar sebesar 11%. Penambahan sagu parut halus tidak memberikan pengaruh negatif terhadap kualitas biologis ransum. Nilai KcBK dan EM ransum ayam broiler dengan penambahan sagu parut halus yaitu 51,37%–55,32% dan 2302,3–2395,23 kkal/kg., The purpose of this study was to determine the effect of the processing of dry grated sago (sapuring) on the biological quality of broiler chicken rations. The processing of dry grated sago consists of harvesting, grating, drying and sieving. Treatment given by the addition of finely grated sago in the ration as much as 17% (25% replace of corn) and 33% (50% replace of corn). This experiment used 12 broiler chickens (5 weeks of age), 9 broiler chickens were given treatment rations and 3 broiler chickens as endogenous treatment. The study was divided into 3 treatments and 3 replications using completely randomized design. Data analyzed using analysis of variance (ANOVA) and the data were further analyzed using Duncan’s multiple range test. Parameters measured were nutrient content of grated sago, NR, DMD and ME. The result showed that the processing of dry grated sago with a sieving process only reduced the crude fiber content by 11%. The addition of finely grated sago doesn’t have a negative effect on biological quality of the ration. The value of DMD and ME of broiler chicken rations with addition finely grated sago are 51,37%–55,32% and 2302,3–2395,23 kkal/kg, respectively.
Keyword: broiler chicken, digestibility, dry grated sago, metabolizable energy

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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