Judul: Corak beberapa jenis kayu perdagangan Indonesia
Abstrak: INTRODUCTION. Total destruction of forests by 2005 is estimated up to 59.1 million ha. To overcome the problem, government through the Forestry Department launched an industrial forest program and plantation forest program. Industrial forest program development is generally higher priority to meet the needs of raw materials for pulp and paper industry. Plantation forest timber generally has short sortimen, small diameter, high ratio of juvenile wood and mature wood. From these characteristics can be concluded that the plantation forest timber, unsuitable for construction raw materials. So that the plantation forest timber with these characteristics can be utilized for the furniture industry raw materials. Some specific criteria of the furniture industry raw materials are a beautiful pattern on the wood. Appearances pattern on the wood are closely related to the constituent of wood anatomical structure. This study aimed to observe the kind of anatomical structures that caused the appearance of decorative figure.
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Judul: Kajian sifat pemesinan kayu kelapa sawit (Elaeis guineensis Jacq.) sebagai bahan bangunan dan furniture
Abstrak: Seiring dengan pesatnya pertumbuhan penduduk di Indonesia, secara tidak langsung akan meningkatkan pula kebutuhan kayu untuk bahan bangunan dan furniture. Data dari Biro Perencanaan Departemen Kehutanan 1997, pada tahun 2000 diperkirakan kebutuhan kayu meningkat sampai 80 juta m³ per tahun, sedangkan ketersediaan kayu bulat pada tahun 2000 diperkirakan hanya 49.01 juta m per tahun. Dari data tersebut dapat dilihat bahwa kebutuhan bahan baku industri perkayuan dalam negeri mengalami kekurangan. Salah satu alternatif usaha dalam menanggulangi masalah tersebut adalah mencari dan memanfaatkan biomassa kayu lainyya yang mempunyai potensi yang besar, diantaranya adalah kayu kelapa sawit (Elaeis guineensis Jacq.). Penelitian ini bertujuan untuk mengetahui kualitas/sifat pemesinan kayu kelapa sawit dalam rangka mengetahui Leknik pemesinan yang tepat serta mencari upaya-upaya perbaikan kualitas. Dengan sasaran terakhirnya adalah termanfaatkannya kayu sawit sebagai bahan bangunan dan furniture.
Keyword: Woodworking

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model