Judul: Status Kesehatan Hutan Tanaman Industri Eucalyptus pellita F. Muell di PT Perawang Sukses Perkasa Industri, Riau.
Abstrak: Praktik pengelolaan hutan di PT Perawang Sukses Perkasa Industri, Riau menggunakan sistem silvikultur tebang habis permudaan buatan. Praktik pengelolaan tersebut dilakukan untuk memperoleh tegakan hutan baru yang seumur dan bernilai tinggi. Pengelolaan hutan produksi perlu memperhatikan kondisi tegakan melalui aspek ekologis hutan agar mendapatkan kualitas produksi yang optimal. Salah satu metode pemantauan kesehatan hutan yang sistem penilaiannya berdasarkan komponen-komponen ekologis hutan adalah Forest Health Monitoring (FHM). Tujuan penelitian ini adalah menilai status kesehatan hutan tanaman industri E. pellita F. Muell di PT PSPI dengan menggunakan metode FHM. Penelitian ini menggunakan indikator kualitas tapak, vitalitas, dan produktivitas. Klaster plot dibangun pada petak RKT, KU1, KU2, KU3, KU4 dan KU5, yang setiap umurnya dibangun pada topografi datar dan agak curam. Hasil akhir nilai kesehatan hutan berdasarkan kelas umur dari KU1 hingga KU5, menunjukkan tingkat kesehatan hutan tanaman industri dalam kondisi sedang, kemudian berdasarkan topografi, hanya topografi datar pada KU5 yang memiliki tingkat kesehatan hutan sehat.
Keyword: E. pellita, hutan tanaman industri, pemantauan kesehatan hutan

Judul: Manajemen Tempat Tumbuh Tanaman Eucalyptus pellita di PT Perawang Sukses Perkasa Industri, Riau
Abstrak: Eucalyptus sp. is one of the species which be developed in the management of wood fiber plantation. Wood fiber for pulp and paper is important, so need to known the management of site to obtain the optimal growth of Eucalyptus pellita at PT Perawang Sukses Perkasa Industri (PSPI). This research intended to observe fertilization management and maintenance management at PT PSPI. This research used Forest Health Monitoring (FHM) method to take data of plant growth. The cluster had 4 plot Iike circle. The sample was E. pellita 1-4 years. Fertilization management at PT PSPI were basic fertilizer (CIRP/Cristmast Island Rock Phosphate and NPK) and supplementary fertilizer (NPK-1, NPK2, NPK-3). Maintenance Management at PT PSPI were ring weeding, sport spray of herbicide and slash. Maintenancing and fertilizing were given to the plot according to the environmental conditions and the age factor. The best growth increment was in plot P2. P2 had 4.14 diameter increment and 5.72 height increment.
Keyword: fertilization management, maintenance management, site management, industrial forest, Forest Health Monitoring, Eucalyptus pellita

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
Keyword: