Judul: Penentuan Masak Fisiologi dan Metode Pengujian Viabilitas Benih Kemangi (Ocimum americanum L.)
Abstrak: Ocimum americanum L. is one of the indigenous plant species that can be used as spices, herbs, and vegetables. These plants are generally propagated using seeds. The purpose of this experiment was to determine the physiological maturity of Basil seed and its viability testing method. The experiment conducted at Medicinal Gardens Conservation Unit (MGCU) and Seed Technology Laboratory, IPB in December 2013 to April 2014. The experiment consisted of two experiments. The first experiment used a completely randomized design (CRD) with 2 factors, that is the harvesting time factors which consisted of 44, 48, 52, 56, and 60 days after flowering (DAF) and the layout factors seed which consisted of the seed lied on the base, middle, and end flowerstalk. The second experiment used split-split plot design that arranged with completely randomized. The first factor was the environmental condition about germination with 2 levels i.e. dark and light condition, the second factor was the soaking seed temperature treatment i.e. water soaking with 40 ºC and room temperature (27 ºC) , and the third factor was the method of germination i.e. the top of paper and the between of paper method. The first experiment results showed that basil seed reached the ripe harvest physiology at the age of 48 DAG and basil seed which located in the middle had the best viability and vigor from the others. The second experiment results showed that the best method on the seed germination of basil seeds obtained by the top of paper method and light condition.
Keyword: seed testing, seed lied, indigenous plant, harvesting time

Judul: Penentuan Masak Fisiologi dan Ketahanan Benih Kenikir (Cosmos caudatus Kunth) terhadap Desikasi
Abstrak: Cosmos caudatus Kunth is one of the indigenous plant species that can be used as natural herbal medicine, and vegetables. Plant Propagation of Cosmos caudatus Kunth using seeds. This research aimed was to determine the period of physiological maturity and to study the resistance of Cosmos caudatus Kunth seed to dessication. The research conducted at Medicinal Gardens Conservation Unit (MGCU) and Seed Technology Laboratory, IPB in December 2013 to April 2014. The first research used a completely randomized design (CRD) with 1 factor for 5 different harvest period (24, 28, 32, 36, 40 days after flowering (DAF)). The second experiment used a completely randomized design (CRD) with 2 factors, those are drying method and time. The drying methods used were of 2 types (drying with heated (38-42 °C and RH 30-36%), (drying unheated (28-32°C and RH 40-44%)) and times of drying (control, 1, 2, 3, 4, 5 hours). The first research revealed that seed physiological maturity can be determined from the suitable harvest period of 40 days after flowering with the best viability and max dry weight of seed. The second research shows the Cosmos caudatus seeds not dried produce higher viability and vigor than dried seeds. Dessication using heating methods have lower viability and vigor than seeds dried with unheated and control methods.
Keyword: seed harvest period., natural herbal medicine, drying methods, box dryer

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