Judul: Pengetahuan Masyarakat dalam Pemanfaatan Hasil Hutan Bukan Kayu (HHBK) Di Kawasan Cagar Alam Gunung Sibela
Abstrak: Community living around Gunung Sibela Nature Reserve depend on its products mainly to fulfill their needs. They develop knowledge to utilize forest resources including Non-Timber Forest Products (NTFPs). The objectives of this research are to describe people’s knowledge of NTFPs and explaining factors that influence pattern of NTFPs utilization. The method used in this research was survey. Data were collected with interview, observation, and secondary data collection. The results show that NTFPs collected by local people comprises of medicinal plants, yarn and handcraft-produce plants, crops, ornamental plants, and group of hunted animals. They utilize NTFPs to fulfil their daily needs and earn more income. Age, education, and work do not influence pattern of NTFPs utilization by local people
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Judul: Pendugaan Nilai Pemanfaatan Hasil Hutan Bukan Kayu di Desa Simatalu Zona Tradisional Taman Nasional Siberut
Abstrak: Masyarakat sekitar hutan sangat bergantung pada hasil hutan untuk memenuhi kebutuhan hidup mereka. Salah satu jenis hasil hutan yang dimanfaatkan masyarakat adalah hasil hutan bukan kayu (HHBK). Pemanfaatan HHBK merupakan serangkaian kegiatan yang mencakup pemanenan, pengolahan, serta pemasaran komoditas hasil hutan tersebut. Penelitian ini bertujuan untuk mengidentifikasi bentuk pemanfaatan dan menduga nilai ekonomi berbagai spesies HHBK yang dimanfaatkan oleh masyarakat di kawasan Taman Nasional Siberut. Metode yang digunakan pada penelitian ini adalah wawancara, observasi lapang, dan studi literatur. Hasil penelitian menunjukkan bahwa masyarakat Desa Simatalu memanfaatkan tujuh spesies HHBK untuk kebutuhan subsisten dan komersial. Spesies HHBK tersebut meliputi rotan manau, madu, kopra, arang, sagu, pinang, dan cengkeh. Faktor-faktor seperti jenis kelamin, kelas umur, dan tingkat pendidikan memiliki kaitan terhadap pemanfaatan HHBK. Total nilai ekonomi yang didapatkan masyarakat desa dari pemanfaatan HHBK sebesar Rp. 10.061.679.969,7 per tahun., Communities around the forest are very dependent on forest products to meet their needs. One type of forest product utilized by the community is non-timber forest product (NTFP). The use of NTFP is a series of activities that include harvesting, processing and marketing of these forest product commodities. This study aims to describe the form of utilization and calculate the economic value of various NTFP species utilized by the community in the Siberut National Park area. The methods used in this study were interviews, field observations, and literature studies. The results showed that the people of Simatalu Village utilized seven NTFP species for subsistence and commercial needs. The NTFP species include manau rattan, honey, copra, charcoal, sago, areca nut and cloves. Factors such as gender, age class, and level of education are related to the utilization of NTFPs. The total economic value obtained by the village community from the utilization of NTFP is Rp. 10,061,679,969.7 per year.
Keyword: utilization, NTFP, community, economic value

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