Judul: Tinjauan Mengenai Aspek Inventarisasi Hutan dalam Kegiatan Pengusahaan Hutan di Indonesia
Abstrak: Hutan sebagai salah satu sumber daya alam yang dapat diperbaharui (renewable resources) memiliki manfaat yang sangat vital bagi manusia, baik manfaat tangible maupun intangible. Hutan mempakan potensi kekayaan alam yang perlu segera dimanfaatkan secara lestari untuk kemakmuran rakyat. Salah satu bidang kehutanan yang memegang peranan cukup penting dalam menentukan keberhasilan pengelolaan hutan adalah bidang inventarisasi hutan, yaitu sebagai dasar untuk mendapatkan bahan guna penyusunan rencana dalam mengelola hutan. Tujuan utama dari kegiatan ini adalah untuk mendapatkan data mengenai massa tegakan atau nilai pohon dengan waktu dan biaya yang terbatas. Tujuan kegiatan magang ini adalah untuk mendapatkan kemampuan profesional dalam memahami prosese kerja secara nyata dan dalam kegiatan tersebut dicoba pula untuk menyusun tabel volume lokal pohon Meranti Merah ( Shorea Ieprosula Miq) tanpa kulit yang diharapkan dapat digunakan untuk kegiatan teknis pelaksanaan dalam pendugaan potensi volume jenis tersebut di lokasi kegiatan.
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Judul: Inventarisasi Hutan Menyeluruh Berkala dalam Pengelolaan Hutan Produksi di Indonesia (Studi Kasus di Provinsi Papua)
Abstrak: The availability of data and information of forest resources plays an important role to determine the direction and clear targets in forest management at forest management unit (FMU) level. In order to preserve sustainable forest management at the sites level, management plans should be set with consideration of the entire ecosystem landscape while maintaining biological diversity and productivity as well as regeneration ability in sustaining life and potential to fulfill functions of the ecological, economic and social for current time and the future. The periodic comprehensive forest inventory (Inventarisasi Hutan Menyeluruh Berkala called IHMB) is Indonesian forest stands inventory were based on compartment at forest effective area of forest management unit (FMU). The purpose of this study is to get information about the suitability and accuracy of the IHMB implementation results to arranging long-term forest management plans (rencana kerja usaha pemanfaatan hasil hutan kayu pada hutan alam called RKUPHHK-HA) in order to forest management that aims to produce sustainable timber. Data gathered with purposive sampling technique with location consideration is the FMU that have been implemented of IHMB and the results has been evaluated and verified by the Ministry of Forestry and Forestry Provincial Office. Sampling plot of IHMB is carried out with consideration: forest cover stratification, accessibility, time and cost. The results of IHMB implementation that contain the availability potentially standing stock and other general information can not be uses as a basis to preparing a forest management plan with the aims of generating sustainable timber with the sustainability forest principles. At the FMU level, the long-term forest management (RKUPHHK-HA) which contains goals and objective of the activity that based on comprehensive data and information covering the aspect of ecological, economic and social. The sense of word “comprehensive” on IHMB is meaningfully only covered the forest area, without including all components of the data and information on forest ecosystem. The data result of IHMB implementation is uses as a basis to arranging RKUPHHK-HA, meanwhile in the short-term forest management (rencana kerja tahunan usaha pemanfaatan hasil hutan kayu pada hutan alam called RKTUPHHK-HA) is implemented by the stage of silvicultural system (tebang pilih tanam Indonesia called TPTI).
Keyword: IHMB, sustainable forest management, forest management plan, forest management unit

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