Judul: Analisis pemanfaatan dan potensi sumberdaya tumbuhan di taman wisata alam ruteng, Nusa Tenggara Timur
Abstrak: Masyarakat sekitar kawasan TWA Ruteng yang memiliki ketergantungan hidup pada sumberdaya tumbuhan hutan. Diperlukan penelitian mengenai tingkat ketergantungan dan spesies tumbuhan yang dimanfaatkan. Penelitian ini bertujuan untuk mengidentifikasi pola pemanfaatan sumberdaya tumbuhan oleh masyarakat sekitar TWA Ruteng yang ditinjau dari segi spesies tumbuhan yang dimanfaatkan, waktu, intensitas dan nilai ekonomi dari hasil hutan yang diambil, menentukan tingkat ketergantungan masyarakat sekitar TWA Ruteng terhadap kawasan dan menentukan potensi sumberdaya tumbuhan TWA Ruteng. Metode penelitian secara garis besar terdiri dari 2 (dua) kegiatan utama, yaitu pengumpulan data primer berupa inventarisasi potensi sumberdaya tumbuhan dan wawancara, pengisian kuesioner dan pengumpulan data sekunder. Masyarakat sekitar TWA Ruteng memanfaatkan 133 spesies dalam 67 famili tumbuhan yang ada di dalam hutan untuk kebutuhan tumbuhan obat 69 spesies (44 famili), pangan 38 spesies (17 famili), bahan bangunan 28 spesies (16 famili), pakan ternak 8 spesies (4 famili), pestisida nabati 4 spesies (4 famili), tumbuhan hias 4 spesies (4 famili), bahan tali dan kerajinan 3 spesies (3 famili), adat/budaya 3 spesies (3 famili), pewarna 2 spesies (2 famili), kayu bakar 2 spesies (2 famili), minuman 1 spesies dan lainnya 2 spesies (2 famili), serta 8 spesies tumbuhan potensial untuk kegunaan pewarna 6 spesies, pestisida nabati 1 spesies dan aromatik 1 spesies. Pemanfaatan sumberdaya tumbuhan hutan dilakukan sepanjang waktu selama satu tahun dengan intensitas kegiatan yang lebih rendah selama 4 bulan, yaitu: pada bulan Maret – April dan September – Oktober yang disebabkan oleh kegiatan menanam dan memanen padi pada lahan pertanian.
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Judul: Inventarisasi Potensi Tumbuhan di Taman Hutan Raya Inten Dewata, Sumedang-Jawa Barat
Abstrak: Grant Forest Park (TAHURA) Inten Dewata has riches of plants as many as 250 species. There are two districts surrounding the area of TAHURA Inten Dewata; Kota Kulon and Pasanggrahaan. Local people in those districts may have interaction with yhe area of TAHURA Inten Dewata, therefore a study of Stocktaking of plant Potential in TAHURA Inten Dewata is badly needed. Stocktaking of plant Potential in TAHURA Inten Dewata was done from May to July 2010. The methods used are field survey with the technique of analysis of vegetation and interviewing by using questionaires as well as herbarium techniques to identify plants. Data analysis was conducted using descriptive statistical techniques including graphical and tabular data. According to the result of analysis vegetation and the interview with the society around the area of TAHURA Inten Dewata, it was found that there were 154 species of plants that belong to 59 families. The total result of plant species based on the analysis of vegetation, it was found that there were 132 species based on the analysis of vegetation belong to 54 families with details specified; 113 species belong to 51 families in Mount Palasari and 27 species belong to 26 families found in Mount Kunci. The society exploits or makes use of 83 species of plants that belong to 35 families in TAHURA Inten Dewata. Species of plants exploited in Mount Palasari are 81 species and 2 species in Mount Kunci. There are 14 groups of usage of plant species which is used to fulfill the daily need. The most usage of plants is for firewood, namely 25 species, whereas the less, 1 species, is for cosmetic. The biggest interaction with TAHURA Inten Dewata of local people is in Gunung Palasari as the access to this area is relatively easier than Gunung Kunci that is boundary with fort. The society around the area make use of plants in TAHURA Inten Dewata. The species that are made use of by local people in TAHURA Inten Dewata such as sugar palm (Arenga Pinnata), coconut (Cocos nucifera), teak (Tectona grandis), bamboo (Gigantochloa apus), and mahagoni (Swietenia mahagoni) that are used for daily need.
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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