Judul: Pengembangan Uji Cepat Viabilitas dan Vigor Benih Kacang Tanah (Arachis hypogea L.) Menggunakan Pengukuran Respirasi dengan Alat Kosmotektor.
Abstrak: The aim of this research is to study of peanut seed vigor testing (Arachis hypogeae L.) by the method of respiration, especially using a cosmotector. The research was done on September to Desember 2011 in Seed Technology Laboratory and Post Harvest Laboratory, Department of Agronomy and Horticulture, Agricultural Faculty, Bogor Agricultural University, Bogor. The research consist of two combination studies. The research has six combinations of treatment between long moisturizing and long incubation at a temperature of 600C with the vigor of peanut seed. There are long moisturizing for 10 hours (L1), 15 hours (L2), and 20 hours (L3). And also long incubation at a temperature of 60o C for 15 minutes (O1), 30 minutes (O2), and 45 minutes (O3) which applied in four different level of seed vigor. There are storage at temperature of 18o C for 4 weeks (V1), accelerated ageing test of physically for 2 days (V2), 4 days (V3), and 8 days (V4). The result showed that all treatments has positive correlation for all benchmarks. The most appropriate method used to measurement of respiration rate of peanut seeds with pretreatment temperature of incubation at 60oC for 45 minutes. Alternative methods that can be used is moisturizing for 15 hours, and than seeds were incubated for 24 hours. Respiration rate was measured using a cosmotector.
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Judul: Pengembangan uji cepat vigor benih jagung ( Zea mays l. ) dengan alat pengukur laju respirasi kosmotektor
Abstrak: The purpose of this research was to obtain the method of corn seed (Zea mays. L) quick vigor testing by cosmotector (respiration measuring tools). This research was conducted in Seed Science and Technology Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Darmaga from February 2011 to May 2011. Simple Regression and Correlation Analysis was follow to conducted the experiment, consisted of six combination treatment between four level of corn seed vigor and the time of seed moistened also seed incubated by oven (60ºC), i.e. O1 : seed incubated by oven during 15 minutes, O2 : seed incubated by oven during 30 minutes, O3 : seed incubated by oven during 45 minutes, L1: seed moistened during 10 hours, L2 : seed moistened during 15 hours, L3 : seed moistened during 20 hours. These treatments were given to trigger the respiration’s rate of corn seed. The result showed that there are positive correlations between vigor and viability parameters with respiration’s rate of corn seed. The method that has a real correlation value was shown by L2 (seed moistened during 15 hours). It can used to detect the status of corn seed vigor and viability by its respiration’s rate.
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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