Judul: Pemanfaatan Paclobutrazol dalam Budidaya Gerbera (Gerbera jamesonii) sebagai Tanaman Hias Pot
Abstrak: Researchutilization ofpaclobutrazolincultivationof gerbera(Gerbera jamesonii) asornamental pot plant was conducted at plantation of Highland Park Bogor Hotel in April to August 2013. The objective of the research was to get the best concentration of paclobutrazol on growth and flowering of gerbera flowers in pots.Research using a completely randomized design with 4 treatments paclobutrazol : control (P0), 20 ppm (P1), 40 ppm (P2), and 60 ppm (P3). The research results showed that application of paclobutrazol can be seen in the growth of vegetative phase such as plant height, number of leaves, leaf length, leaf width and number of tillers. Paclobutrazol affected the ideal proportion of gerbera’s plant in pot such as comparison between plant height with pot height and plant canopy diameter with the diameter of pot. The application of paclobutrazol inhibit generative phase on gerbera plants such as time the first flower buds appear , the number of flowering plants, the diameter of flower and the diameter of the flower stalk.
Keyword: paclobutrazol, ornamental pot plant, flowering,gerbera

Judul: Pengaruh Pemberian Paclobutrazol terhadap Pertumbuhan Planlet Anggrek Dendrobium lasianthera pada Tahap Aklimatisasi.
Abstrak: The objective of this research was to determine the effect of paclobutrazol to orchid Dendrobium lasianthera planlet in acclimatization stage. The research was conducted in green house, Cikabayan Department Agronomi and Horticulture IPB Dramaga, Bogor from Oktober to December 2011. The research was arranged in Completely Randomized Design, with paclobutrazol as a treatment.There were five concentration of paclobutrazol; 0, 5, 10, 15, and 20 ppm. Each treatment was repeated five times and number each treatment has 25 unit experiment. Each unit treatment has 10 planlet to grow, so total planlet in experiment is 250 planlet. The result from this research showed that the effect of application paclobutrazol was not significant for percent to grow, lenght leaf, colour leaf, number of root, length root, diamtre of root, plant height, number of shoot, diameter cell palisade, and weight of fresh plant. The range chlorophyl (a+b) is 0.4296 until 0.8477 mg/g, and the range number of cell palisade is 229.35 until 346.58/ mm2, The density of stomata is 50.96 until 86.64/ mm2.
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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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