Judul: Uji Efektivitas Penambahan Beberapa Jenis Pupuk Organik Terhadap Pertumbuhan Dan Pembungaan Bunga Potong Gerbera (Gerbera Jamesonii) Var. Red Ruby
Abstrak: The research aimed to study the effectiveness of addition some types of organic fertilizers on growth and flowering of Gerbera (Gerbera jamesonii) cut flower var. Red Ruby. This research was conducted from March 2010 to December 2010 at Balai Penelitian Tanaman Hias (BALITHI) Segunung, West Java. This research was used single factor treatment that arranged in randomized block design enviroment. Organic fertilizers was used consist of three types (chicken manure, goat manure, and green manure). The treatments were administered in the form of top soil volume ratio with certain type of organic fertilizers. The result showed that addition some type of organic fertilizers are not significantly affected to some variable (the number of sucker, the lenght and width of leaves, leaf dry weight, the number of flower, stalk flower diameter, vase life of flower). The addition of green manure with volume ratio of 1:1 and 1:3 increases the amount of leaf growth. The addition of chicken manure with volume ratio of 1:2 increases flower diameter while long stalk flower increased by addition chicken manure at volume ratio of 1:1. Treament with addition goat manure at volume ratio 1:1 showed the fastest of initiation time in flowering.
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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: 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