Judul: Pengaruh penyimpanan dan perlakuan pendahuluan terhadap viabilitas benih kayu manis (Cinnamomum burmannii BL.)
Abstrak: Cinnamon (Cinnamon burmanni BL) is one of the plants which has good prospect and commonly developed in Indonesia. The seeds of this plant are categorized as short lived and have poor storability, and therefore, they rapidly loose their germination capacity. Poper technique of seed storage is one of the best ways at present to fulfill the demand for this seed without damaging the seed condition. The objective of this research was learning the effect of storage period and soaking in coconut water, on seed viability of Cinnamomum burnannii.
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Judul: The Technique of Storage and Scarification Nutmeg Seed (Myristica Fragrans Houtt.) for Viability Test of Seeds
Abstrak: Benih pala termasuk benih yang memiliki kulit benih yang keras, sehingga dapat menghambat proses perkecambahan benih. Selain itu benih ini merupakan benih rekalsitran yang tidak dapat disimpan dalam waktu yang lama. Penelitian ini bertujuan untuk mengetahui media simpan yang paling tepat dalam menjaga viabilitas benih pala serta skarifikasi kimia yang paling efektif digunakan dalam mempercepat pematahan dormansi benih pala. Penelitian dilakukan dengan menyimpan benih pala 0-2 minggu dengan perlakuan tanpa media simpan, media simpan sabut kelapa (cocopeat) dan media simpan serbuk gergaji. Lalu dilanjutkan dengan perlakuan skarifikasi kimia menggunakan air, giberelin dan air kelapa dan. Masing-masing perlakuan juga disertai dengan perlakuan skarifikasi fisik. Hasil penelitian menunjukkan bahwa penggunaan media simpan sabut kelapa (cocopeat) dapat mempertahankan kadar air benih hingga minggu ke-2 penyimpanan dan memberikan hasil terbaik terhadap viabilitas benih pala., Nutmeg seeds include seeds that have a hard seed coat, which can inhibit the seed germination process. In addition, this seed is a recalcitrant seed that cannot be stored for a long time. This study aims to determine the most suitable storage media in maintaining the viability of nutmeg seeds and the most effective chemical scarification used in accelerating the breaking of nutmeg seed dormancy. The research was conducted by storing nutmeg seeds 0-2 weeks with treatment without storage media, coconut fiber storage media (cocopeat) and sawdust storage media. Then proceed with the treatment of chemical scarification using water, gibberellins, and coconut water. Each treatment was also accompanied by a physical scarification treatment. The results showed that the use of coconut coir storage media (cocopeat) could maintain the moisture content of the seeds until the 2nd week of storage and gave the best results on the viability of nutmeg seeds.
Keyword: coconut water, cocopeat, gibberelins, nutmeg seeds, sawdust

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