Judul: Studi kelayakan usaha budidaya dan prospek pasar Lempuyang Wangi (Zingiber aromaticum Val) oleh Lembaga Masyarakat Desa Hutan Desa Ngliron di BKPH Ngliron KPH Randublatung
Abstrak: Prospects of cultivation medicinal plants showed positive trends. It is characterized by high demand for medicinal plants both domestic and international, while the supply of medicinal plants is still low. According to Agricultural Research and Development (2007), 85% of raw material supply to 1.023 medicine industries derived from exploitation the forest and without any cultivation. In the future, cultivation is important step to prevent the extinction of some medicinal plants. One type of medicinal plants to cultivated is lempuyang wangi (Zingiber aromaticum Val). Lempuyang wangi with good quality can be found at Ngliron, Blora. At place, it can to increase income of Ngliron’s society beside agricultural activities. During this time, Ngliron’s society take lempuyang wangi from the forest and without leaving of rhizome. As a result, the next year decreased in the total of harvested lempuyang wangi. To start activity of cultivation, require to be a feasibility study. The feasibility study which examined in this research aims to analyze prospects and feasibility level of cultivation lempuyang wangi in Ngliron. Scope of this research includes aspects of market research, technical and technological, management and organization, financial, and business impact. Based on market analysis, the price of dry lempuyang wangi at the first years is Rp 9.000/kg and will be increasing 5% each years. Based on technical and technological analysis, cultivation areas located in the forest around the village Ngliron the governance area BKPH Ngliron KPH Randublatung. Cultivation area of 6 ha produce 9,2 tons/year of dry lempuyang wangi. Based on management and organization analysis, this cultivation managed by 52 people who joined in the Forest Village Community Institution of Ngliron Village. Based on the environmental aspects, lempuyang wangi cultivation is worth running. Based on financial analysis, the total investment cost reaches is Rp 28.200.000,00, it derived from Perhutani’s sharing funds to LMDH of Ngliron Village. The analysis shows the value is NPV : Rp 4.725.383,00, IRR : 16,15%, BCR : 1,17, and PBP : during 6,05 years. Based on the sensitivity analysis, cultivation is sensitive to changes in sharing with farmers increase to 78% and a decrease in production volumes by 5% each year. Analysis of the eligibility criteria indicated Ngliron cultivation in the Village is worth running.
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Judul: Cooperative entrepreneurship business plan for yard-based ginger cultivation in Bubulan Village, Bubulan District, Bojonegoro Regency
Abstrak: Kabupaten Bojonegoro merupakan salah satu daerah yang mayoritas penduduknya bekerja dibidang pertanian dengan tingkat pendapatan yang rendah. Untuk itu, diperlukan sebuah strategi yang dapat meningkatkan pendapatan para pekerja sektor pertanian dengan memanfaatkan sumberdaya yang ada. Pemanfaatan pekarangan untuk budidaya tanaman bernilai ekonomi seperti jahe merupakan salah satu alternatif yang dapat dilakukan penduduk untuk memperoleh tambahan pendapatan. Agar kegiatan pemanfaatan ini dapat dikembangkan secara terstruktur, perlu dilakukan penerapan konsep wirakoperasi. Tujuan penelitian ini adalah rancangan bisnis wirakoperasi jahe berbasis lahan pekarangan. Metode analisis aspek non finansial meliputi rencana pemasaran, rencana teknis, dan rencana manajemen sedangkan analisis aspek finansial meliputi rencana keuangan. Hasil penelitian menunjukkan bahwa produk jahe dari usaha ini akan dipasarkan untuk kebutuhan konsumsi masyarakat dengan target produksi 5,5 ton per bulan dalam waktu 5 tahun dibawah lembaga koperasi sebagai badan usaha. Nilai NPV usaha terhitung layak dan mencapai Rp170.770.105 selama 5 tahun dengan nilai gross B/C sebesar 1.12. Pada tahun pertama dengan skema pembagian hasil sebesar 50% untuk petani, 5% wirakoperasi dan 45% sebagai laba tertahan, usaha ini dapat memberikan pembagian hasil sebesar Rp1.616.200 kepada setiap petani yang melakukan panen. Pada tahun kedua dengan skema pembagian hasil 70% terhadap petani, 10% terhadap wirakoperasi dan 20% sebagai laba ditahan, usaha ini memberikan pembagian hasil sebesar Rp4.487.560 kepada setiap petani yang melakukan panen., Bojonegoro Regency is one of the areas where the majority of the population works in agriculture with a low level of income. For this reason, a strategy is needed that can increase the income of agricultural sector workers by utilizing existing resources. The utilization of yards for cultivating economically valuable plants such as ginger is an alternative that residents can do to obtain additional income. In order for this utilization activity to be developed in a structured manner, it is necessary to apply the concept of cooperative entrepreneurship. The purpose of this study is the design of a yard-based ginger cooperative entrepreneurship. Non-financial aspect analysis methods include marketing plans, technical plans, and management plans while the analysis of financial aspects includes financial plans. The results of the study show that ginger products from this business will be marketed for public consumption with a production target of 5.5 tons per month within 5 years under the cooperative as a business entity. The NPV value of the business is considered feasible and reaches IDR 170,770,105 for 5 years with a gross B/C value of 1.12. In the first year, with a profit sharing scheme of 50% for farmers, 5% as a cooperative entrepreneurship and 45% as retained profit, this business can provide a profit sharing of IDR 1,616,200 for each farmer who harvests. In the second year, with a profit sharing scheme of 70% for farmers, 10% for cooperative entrepreneurship and 20% as retained earnings, this business provides a profit sharing of IDR 4,487,560 for each farmer who harvests.
Keyword: Bojonegoro, business plan, cooperative entrepreneur, ginger  cultivation, yard cultivation

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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