Judul: Analisis Finansial Usaha Hutan Rakyat Jabon Pola Bagi Hasil di Unit Usaha Perhutanan Kebun Semeru Bogor
Abstrak: Wood utilization of private forest has a potential to fulfill the raw material demand of industry amid the decreasing of natural forest resources in Indonesia. One of scheme for development of private forest in Indonesia is partnership scheme. The purpose of this research is to determine the financial feasibility of partnership scheme with profit sharing mechanism in jabon (Anthocephalus cadamba Miq.) private forest management at Kebun Semeru Forestry Business Unit (UUP Kebun Semeru), Mitra Karsa Cooperative, Forestry Research and Development Agency that located in Leuwiliang District, Bogor Regency, West Java Province. Financial analysis using Discounted Cash Flow methods shows that the NPV is Rp 202.700.335, IRR is 31% and Net B/C is 1,37. It means that private forest management by UUP Kebun Semeru is financially feasible. Despite net profit that earned from this partnership scheme is less than net profit earned by self-capital or bank loan capital for private forest, this profit sharing scheme is one of profitable option in the situation of capital limitation or complex requirements to get loan from official financing sector such as bank.
Keyword: financial analysis, profit sharing scheme, private forest

Judul: Analisis Finansial Usaha Hutan Rakyat di Desa Karyasari, Kecamatan Leuwiliang, Kabupaten Bogor
Abstrak: Potensi kayu dan non kayu dari hutan rakyat dapat dijadikan sebagai alternatif pemenuhan kebutuhan bahan baku, meningkatkan kesejahteraan dan pendapatan bagi rumah tangga petani hutan dengan memanfaatkan lahan milik sebagai bentuk investasi yang dapat memberikan kontribusi dan keuntungan bagi petani hutan rakyat. Tujuan dari penelitian ini memberikan informasi kelayakan usaha hutan rakyat di Desa Karyasari secara finansial dan sensitivitas usaha terhadap berbagai kemungkinan yang terjadi. Berdasarkan hasil analisis finansial usaha hutan rakyat dengan pola monokultur dan agroforestri secara finansial layak dikembangkan melalui tiga indikator kelayakan yakni NPV, B/C Ratio dan IRR. Dari hasil tersebut usaha hutan rakyat dengan pola agroforestri jati, kayu afrika dan tujuh tanaman pengisi lebih menguntungkan untuk diusahakan dibandingkan dengan pola agroforestri mahoni, mangium dan enam tanaman pengisi dan pola monokultur mangium dengan nilai NPV sebesar Rp 3.301.356.466, B/C Ratio sebesar 4,41 dan IRR sebesar 25%. Usaha hutan rakyat di Desa Karyasari lebih sensitif terhadap penurunan harga jual dibandingkan dengan kenaikan biaya produksi.
Keyword: agroforestri, analisis finansial, Desa Karyasari, hutan rakyat

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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