Judul: Pengaruh Asal Bahan dan Media Stek terhadap Keberhasilan Stek Pucuk Tembesu [Fagraea fragrans (Roxb.) Miq]
Abstrak: Fagraea fragrans known as tembesu is a tree species used for wood panel (MDF, medium density fiberboard), particle board, veneer and furniture. This study aimed to determine successful growth of shoot cuttings and material F. fragrans and to study the effect treatment combination the origin of cutting material and media. KOFFCO system is used for shoot cuttings F. fragrans. The results showed that the cutting material from juvenile shoot the higher percentage of shoot sprouting, survived and rooted are sprouted 61.56%; 91.42% and 76.33%. In addition, the seed material cuttings provide a very real effect on root length and root wet weight, shoot wet weight, root dry weight and shoot dry weight. The increasing age of the parent tree, diminishing cuttings success. The media cuttings cocopeat (coir dust) with paddy husk gives significant effect on root length parameter, root wet weight and very real effect at parameter root dry wet. There are interaction between the cuttings material with media cuttings, like root length parameter, root wet weight and root dry weight.
Keyword: cutting and Fagraea fragrans, age of the parent tree

Judul: Pengaruh Komposisi Media Tanam Terhadap Pertumbuhan Stek Batang Tanaman Ara (Ficus carica L).
Abstrak: The aimed of this study was to find the best plant media for the growth of fig cuttings. The experiment was conducted in July to October 2012 at Leuwikopo Experimental Farm, Bogor Agricultural University, Indonesia. The experiment was arranged in Randomized Complete Block Design with plant media compotition as the treatment and four replications. The plant media consisted of soil, rice hull charcoal, and goat manure (2:1:1); soil, bamboo leaves compost and rice hull charcoal (2:1:1); cocopeat and bamboo leaves compost (1:1);rice hull charcoal, goat manure and bamboo leaves compost (1:1:1). The result showed that the plant consisted of soil, rice hull charcoal, and goat manure; soil, bamboo leaves compost and rice hull charcoal; and rice hull charcoal, goat manure and bamboo leaves compost gave the same performance in fig cuttings of life percentages, that were 65.5, 70.0 and 65.0%, whereas plant media consisted of cocopeat and bamboo leaves compost gave the lowest result of 37.5%.
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Judul: igenvalues and Eigenvectors of Tridiagonal Matrix with Non Constant and Recurrent Diagonal Entries.
Abstrak: Matriks tridiagonal adalah suatu matriks yang mempunyai entri-entri bernilai nol kecuali pada diagonal utama, di bawah diagonal utama (subdiagonal) dan di atas diagonal utama (superdiagonal). Entri pada diagonal utama tidak konstan dan berulang. Setiap entri pada matriks tridiagonal ini adalah bilangan kompleks. Dalam karya ilmiah ini, akan dibuktikan 3 teorema untuk menentukan nilai eigen dengan 2 kasus dan 1 teorema untuk menentukan vektor eigen. Teorema pertama menentukan polinomial karakteristik dari matriks tridiagonal. Polinomial karakteristik dari matriks tridiagonal tersebut digunakan untuk menentukan nilai eigen pada teorema kedua dan ketiga serta menentukan vektor eigen pada teorema keempat
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