Judul: Pengaruh Lama Penyimpanan dan Kombinasi Indigofera zollingeriana dan Leucaena leucocephala terhadap Kualitas Fisik Pellet
Abstrak: Pellet was formed by mixtures, compacting and forcing through die openings by any mechanical process. This research was to strudy the effect of using Indigofera zollingeriana and Leucaena leucocephala on pellets related the quality of the physical properties and long storage. The experiment model was a Randomized Completely Design with factorial pattern (4x4) with two factors and three replications. Factor 1 was a combination level i.e. R1 = 30% Leucaena leucocephala + 0% Indigofera zollingeriana; R2 = 20% Leucaena leucocephala + 10% Indigofera zollingeriana; R3 = 10% Leucaena leucocephala + 20% Indigofera zollingeriana; R4 = 0% Leucaena leucocephala + 30% Indigofera zollingeriana, and factor 2 was storage periods i.e. M0 = 0 week, M2 = 2 weeks, M4 = 4 weeks, M6 = 6 weeks. The parameter observerd were: moisture content, water activity, specific gravity, particle size, angle of response, compacted density and pellet durability index (PDI). The data were analyzed by analysis of variance and the significant result then examined by orthogonal contrast test. The result showed that combination Indigofera zollingeriana and Leucaena leucocephala and storage periods were significantly different (P<0.01) affect the angle of response, particle size, compacted density and pellet durability index. Pellet containing 20% and 30% Indigofera zollingeriana have the highest score of PDI and particle size, and pellet containing 10% Indigofera zollingeriana have the highest score of compacted density.
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Judul: Pengaruh Diameter Pelet dan Lama Penyimpanan Terhadap Kualitas Fisik Pelet Daun Legum Indigofera sp.
Abstrak: The experiment investigated the effect of different pellet diameter and time of storage on physical properties of pelleted Indigofera-leaves. This study consisted of two experiment; the first experiment was investigation of the die size (die 3, 5 and 8 mm) effects on physical properties using a Completely Randomized Design (CRD) with 3. The second experiment was the effect of storage quality on physical quality of pellets of the Indigofera-leaves. A factorial Completely Randomized Design (CRD) was applied with 3 replications, the first factor was die diameter consisting of 3, 5 and 8 mm and the second factor was the storage time (0, 7, 15, 30 and 60 days). The Observed physical properties of the tested pellets were water content, specific gravity, bulk density, compacted bulk density, respone of angle and pellet durability index (PDI), water activity and organoleptic test. The result of this experiment indicates that specific gravity, bulk density, and compacted bulk density of pellet higher than Indigofera leaves powder so that is more efficient for conveying and storing. The diameter difference of pellet did not have much influence on physical pellet quality which can‟t be broken easily. Leaves pellet of Indigofera sp. stored up to sixty days showed the result constantly so pellet can be stored in a long time.
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf