Judul: Komposisi Vegetasi dan Potensi Tumbuhan Obat di Hutan Kerangas Kabupaten Belitung Timur Provinsi Kepulauan Bangka Belitung
Abstrak: Heath forest on East Belitung is thought to have a diversity of plant species that can be used for medications. However, the information about it has not been revealed yet. Therefore, research about composition of vegetation and potential medicinal plants in the heath forest is necessary. This research was conducted in the primay heath forest (Rimba), secondary heath forest (Bebak) and particular heath forest (Padang) at East Belitung on July to Agustus 2011. The collected data includes species of plants (local name and scientific name), species of plants used medicine and part of plants that is used for medicine. Methods that is used to collect the data is the analysis of vegetation and interview method. Analysis vegetation was done by using combination of line and compartment method. The number of lines in each forest type are 10 with each line size is 10 m × 100 m and the distance between the lines is 50 m. The research results 224 species of plants in the heath forest obtained from different habitus and growth rates. Species with the highest value of importance on seedling, bush/shrub, herbaceous, liana, rattan and pandan is the samak (Syzygium lepidocarpa) amounted to 20.2% in the primary heath forest, pulas (Guioa pleuropteris) amounted to 12.57% in the secondary heath forest and kucai padang (Fimbristylis sp.) amounted to 51.14% in the particular heath forest. Species with the highest value of important on sapling is betor belulang (Calophyllum lanigerum) amounted to 17.27% in the primary heath forest, kiras (Garcinia hombroniana) amounted to 21.50% in the secondary heath forest and sekuncong (Leptospermum flavescens) amounted to 88.46% in the particular heath forest. Species with the highest value of important on tree is seru (Schima wallichii) amounted to 53.36% in primary heath forest, seru (Schima wallichii) amounted to 103% in secondary heath forest and sekuncong (Leptospermum flavescens) amounted to 180.2% in the particular heath forest. The number of medicinal plant species are identified based on knowledge of local communities as much as 101 species. Plant family which were most widely utilized is Myrtaceae. Tree is the most common habitus of medicinal plant to be used. The part of plants which is widely used is root and the most numerous group of diseases cured with medicinal plant is diseases of body resilience system (fever). Composition of vegetation in heath forest is potential as a germ plasm reserve of medicinal plants in Indonesia. Heath forest resources conservation can support sustainability of species and benefits to community around the forest.
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Judul: Etnobhotany of Kerinci Ethinic Around Bukit Tinggai Indigenous Forest Sungai Deras Village, Kerinci Regency of Jambi Province).
Abstrak: Hutan adat dengan masyarakatnya merupakan kesatuan yang tidak dapat dipisahkan. Masyarakat ini biasanya memiliki pengetahuan mengenai peranan kearifan lokal. Peranan kearifan lokal tersebut antara lain dalam penggunaan bahan-bahan alam terutama tumbuhan maupun kearifan pengelolaan hutan. Melihat hal tersebut serta proses pendokumentasian yang masih sangat kurang dan adanya perubahan tentang pengelolaan kawasan hutan di beberapa daerah seperti di Hutan Adat Bukit Tinggai, maka perlu dilakukan penelitian untuk menindaklanjuti hal tersebut. Tujuan dari penelitian ini yaitu (1) mengetahui pemanfaatan jenis tumbuhan oleh masyarakat Suku Kerinci di Desa Sungai Deras Kecamatan Air Hangat Timur Kabupaten Kerinci Provinsi Jambi; (2) inventarisasi jenis tumbuhan di Hutan Adat Bukit Tinggai Desa Sungai Deras, Kecamatan Air Hangat Timur, Kabupaten Kerinci Provinsi Jambi. Penelitian dilakukan dengan tiga tahap yaitu (1) studi pustaka berupa pencarian dokumen untuk data sekunder; (2) kajian lapang etnobotani berupa wawancara, survei lapang dan inventarisasi lapang, analisis vegetasi dan pembuatan herbarium; (3) pengolahan dan analisis data yeng meliputi klasifikasi kelompok kegunaan, persentase habitus dan bagian yang digunakan, indeks nilai penting (INP), keanekaragaman spesies Shannon–Wienner, dan persentase potensi tumbuhan berguna. Jumlah jenis tumbuhan yang ditemukan berdasarkan wawancara dan analisis vegetasi adalah 194 jenis. Hasil wawancara etnobotani ditemukan sebanyak 132 jenis dari 55 famili yang juga telah diketahui manfaatnya dan dikelompokkan kedalam 13 kelompok kegunaan. Jumlah jenis hasil analisis vegetasi sebanyak 107 jenis dari 52 famili. Jumlah jenis tumbuhan berguna berdasarkan habitusnya paling banyak adalah tingkat pohon dengan jumlah 55 jenis. Pada tingkat semai satepau memiliki dominansi terbesar yaitu 20,45 %, pada tingkat pancang adalah jenis kayu pecah pinggang (Castanopsis malaccensis Gamble.) dengan nilai 16,70 %, pada tingkat pertumbuhan tiang yaitu semantao (Ficus padana) sebesar 33,61 %, dan kayu pecah pinggang (Castanopsis malaccensis Gamble.) pada habitus pohon yaitu 23,27 %. Kegunaan tumbuhan yang paling banyak dimanfaatkan adalah untuk pengobatan sebanyak 54 spesies dari 39 famili. Spesies-spesies tumbuhan berguna potensial yang ada di Hutan Adat Bukit Tinggai antara lain kopi (Coffea sp.), kayu manis (Cinnamomum subavenium Miq.) dan cengkeh (Eugenia aromatica)
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Judul: Penyelesaian Masalah Rotasi Aliran Fluida Kental Von Karman Menggunakan Metode Homotopi
Abstrak: Von Karman equation is an equation that describes fluid viscous flow induced by infinite disk rotation. By assuming steady flow and laminar, viscous incompressible fluid flow is represented in Von Karman equation by an angular velocity and the vertical direction velocity as the independent variables. Von Karman equation is a nonlinear problem that is solved using the homotopy method. The use of homotopy method is done by defining an homotopy function that requires auxiliary parameters to control the convergent region of the solution. The solution is a recursive formula with given initial conditions. Using software based-functional shows that velocity components converge to a value.
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