Judul: Penyebaran Spasial Keanekaragaman Tumbuhan Pangan dan Obat di Kampung Nyungcung, Desa Malasari, Kecamatan Nanggung, Bogor.
Abstrak: Nyungcung Kampong is situated near to the forest, in which very rich in term of plant biodiversity. The plant potentially can be utilized by the community to fulfill their need of food and medicine. The objective of the research was to identify the diversity, potency, and spatial distribution of food and medicinal plants in Nyungcung Kampong. The research was conducted by vegetation inventory and eksploration during March 2015. Result showed there was different diversity value and evenness index among every growth strata. In total, there were 318 specieses or 98 families that consist of 56 species of food plants, 112 species of food functional plants, and 150 spesies of medicinal plants. With regard to land cover/land use class, home garden had the highest number of food and medicinal plants. The plants distributed mostly on elevation of about 600--800 mdpl (308 species) or at gentle slope of about 0-8% (168 species). In addition to slope and elevation, biotic (factor caused by human) have a considerable effect in the distribution of plants. In short, the community need of necessity food and medicine can be provided by the forest and its surrounding areas.
Keyword: food and medicinal plants, Nyungcung kampong, plants potency, spatial distribution

Judul: Sebaran Spasial Tumbuhan Obat yang Dimanfaatkan Masyarakat Kampung Nyungcung, Desa Malasari, Kecamatan Nanggung, Kabupaten Bogor.
Abstrak: Nyungcung kampoong is least developed village, situated in Nanggung sub-district. The community of the kampoong utilized medicinal plant from its sorrounding location included forest area. For the purposes of management, spatial distribution mapping is very important. The purpose of the study is to identify the diversity and forms of utilzation as well as biophysical characteristics and accessibility. Data collection, interview and field observation were conducted in March 2015 in Nyungcung kampoong, Village Malasari, Nanggung subdistrict, Bogor. Result showed that there were 140 species of medicinal plants utilized by the community. Among the medicinal plants species family Zingiberaceae was the most predominantly utilized located in home garden and upland field. The average distance medicinal plants from the house was about 214 meters from the house situated on 600–800 meters above sea level, with gentle slope. Community utilized medicinal plants that located at its surrounding house. This is due to the fact that they have conducted domestication of the wild species from the forest. This showed that community contribute to forests conservaton.
Keyword: distribution, medicinal plant, utilization

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