Judul: The Health Assessment of Shorea spp. Seed Source by Forest Health Monitoring method in order to formulate Management Strategy of FASP Haurbentes, Bogor.
Abstrak: Kawasan hutan dengan tujuan khusus (KHDTK) Haurbentes adalah salah satu kawasan hutan yang telah ditunjuk untuk kegiatan penelitian dan pengembangan. KHDTK Haurbentes yang dibangun sejak tahun 1940 ini terletak di Kecamatan Jasinga Kabupaten Bogor. Peran dan fungsi KHDTK Haurbentes saat ini telah berkembang antara lain sebagai sumber benih dan plasma nutfah Shorea spp. Fungsi KHDTK Haurbentes tersebut menjadi sangat penting mengingat populasi dan penyebaran Shorea spp. di alam yang semakin berkurang, akibat eksploitasi secara berlebihan tanpa diiringi upaya pelestarian., Forest area with special purposes (FASP) of Haurbentes was one of the forest areas for research and development activities. FASP of Haurbentes was established in 1940 located at Jasinga Sub-District of Bogor. Currently the roles and functions of FASP of Haurbentes are to become seed sources and germplasm conservation area for Shorea species. The functions of FASP Haurbentes become more important considering the population and distribution of Shorea spp. in nature, which have threatened by over exploitation without any effort of conservation.
Keyword: Forest health monitoring, FASP, seed sources, Shorea spp., sustainability

Judul: Struktur dan Potensi Tegakan Hutan Tanaman Meranti (Shorea spp.) di KHDTK Haurbentes Kabupaten Bogor
Abstrak: Structure and potency of forest stand meranti (Shorea spp.) in Forest Area with a Specific Purpose (FASP) Haurbentes is very interesting to be studied. FASP Haurbentes is a plantation forest area that built in 1940-1986. Variety compositions and vegetation covers of FASP Haurbentes are similar to the natural forest condition. Important Value Index (IVI) are used to measure the forest stand structure. IVI can be used to determine the compositions of vegetation type in various stage of growth level on the observation plots. Furthermore, forest stand potency needs to be estimated through volume estimation testing models that is already made. Research method use a line plots method. In the observation plots, forest stands structure in FASP Haurbentes forms an inverted J curve. Varieties that have the highest IVI in seedlings, saplings, poles and trees stage respectively are Shorea pinanga (47.1%), Shorea pinanga (80.1%), Shorea mecisopteryx (90.9%), and Shorea selenica (87.3%). Meranti Stands potency in FASP Haurbentes is in the amount of 434.66- 551.94 m3/ha. Meranti volume estimation model in FASP Haurbentes is V = 0.000234423 Dbh2.37.
Keyword: Bogor Agricultural University (IPB), volume equation, structure, potential, meranti

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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