Judul: Feasibility Study for Development of Calophyllum Oil and Resin Industry
Abstrak: Pemanfaatan tanaman yang berkhasiat bagi kesehatan merupakan aspek yang perlu dikembangkan di Indonesia. Hal tersebut disebabkan besarnya jumlah tanaman berkhasiat yang belum dimanfaatkan dalam industri. Nyamplung merupakan salah satu tanaman berkhasiat tinggi yang prospektif untuk dikembangkan. Faktor utama yang menjadikan nyamplung prospektif adalah minyak dan resinnya yang memiliki banyak manfaat, serta produktivitas bahan bakunya yang tinggi. Studi kelayakan industri dilakukan agar dapat diketahui kelayakannya ditinjau dari beberapa aspek, yaitu aspek pasar dan pemasaran, teknis dan teknologi, manajemen dan organisasi, lingkungan, kelayakan finansial, dan analisis sensitivitas. Penentuan lokasi industri dilakukan dengan metode Brown-Gibson, sehingga didapatkan lokasi pendirian di Kawasan Industri Jababeka, Kabupaten Bekasi, Jawa Barat. Industri berjalan dengan kapasitas produksi minyak sebesar 72 315.625 L/tahun dan resin sebesar 18 250 L/tahun. Berdasarkan kriteria kelayakan finansial, industri tidak layak untuk dijalankan dengan NPV yang didapatkan sebesar Rp -3 327 250 185, IRR sebesar -31.89%, gross B/C ratio sebesar 0.9422%, dan PBP lebih dari 10 tahun. Berdasarkan analisis sensitivitas, didapatkan 2 usulan perbaikan agar industri menjadi layak. Usulan 1 adalah penurunan biaya tenaga kerja 20% dan biaya bangunan industri 30%. Usulan 2 adalah penurunan biaya tenaga kerja 10%, penurunan biaya bangunan industri 10%, dan peningkatan harga jual produk 5%., The utilization of efficacious plants for health is an aspect that needs to be developed in Indonesia. This is due to the large number of efficacious plants that have not been used in industry. Nyamplung is one of the plants with high efficacy that prospective to be developed. The main factors that make nyamplung become prospective are its oil and resin which have many benefits, and also its raw material high productivity. The feasibility study was conducted based on several aspects, such as market and marketing, technology and engineering, organization and management, environmental, finance, and sensitivity analysis. The determination of industrial location was done by applying the Brown-Gibson method, and the selected location was Kawasan Industri Jababeka, Bekasi, West Java. The industry produced oil of 72 315.625 L/year and resin of 18 250 L/year. Based on the financial eligibility criteria, the industry was not feasible to be established with NPV of Rp -3 327 250 185, IRR of -31.89%, gross B/C ratio of 0.9422%, and PBP for more than 10 years. Based on sensitivity analysis, it was known that there were 2 proposed solutions that made the industry was feasible. Solution 1 was 20% reduction in labor cost and 30% reduction in industrial facilities cost. Solution 2 was 10% reduction in labor cost, 10% reduction in industrial facilities cost, and 5% increase in product price.
Keyword: Brown-Gibson method, Calophyllum, feasibility study, oil, resin

Judul: Business Analysis on Serum Oil Industry and By-Products Based on Nyamplung Fruit on a Medium Industrial Scale
Abstrak: Pemanfaatan tanaman untuk produk kosmetik kulit merupakan hal yang perlu dikembangkan di Indonesia. Hal ini didasari dengan melimpahnya tanaman berkhasiat yang belum dimanfaatkan secara maksimal untuk produk kosmetika perawatan kulit. Nyamplung (Calophyllum inophyllum) merupakan salah satu tanaman berkhasiat tinggi yang prospektif untuk dikembangkan. Faktor utamanya yaitu pada produkminyak nyamplung memiliki kandungan senyawa aktif dan beragam manfaat. Minyak nyamplung dapat diproduksi melalui proses ekstraksi secara mekanik dan atau dengan pelarut. Selain minyak, terdapat produk samping berupa biopelet dan pakan ternak yang akan menambah pendapatan. Teknologi proses produksi minyak serum yang diuji dalam penelitian ini menggunakan bahan baku biji nyamplung segar dengan tiga skema proses produksi dimana setiap skema melakukan dua kali proses ekstraksi minyak dengan kombinasi yang berbeda, yaitu cold dan hot hydraulic press, cold hydraulic press dan pelarut biner, hot screw press dan pelarut biner. Penelitian ini dilakukan untuk merancang model bisnis menggunakan metode Business Model Canvas (BMC) yang mencakup produk, segmentasi konsumen, rancangan keuangan, dan kegiatan operasional, serta menganalisis studi kelayakan untuk setiap skema. Hasil analisis biaya dari masing-masing proses produksi pada skema 1 mendapatkan nilai biaya investasi sebesar Rp 2.714.434.262 dengan besar pendapatan sebesar Rp 4.049.062.489. Untuk skema 2 memperoleh biaya investasi senilai Rp 3.118.791.515 dengan pendapatan sebesar Rp 5.208.184.137. Terakhir pada skema 3 memperoleh biaya investasi sebesar Rp 3.033.466.092 dengan pendapatan Rp 5.924.724.490. Berdasarkan studi kelayakan yang telah dilakukan dengan 4 kriteria yaitu Net Present Value (NPV), B/C ratio, Payback Period (PBP), dan Return on Investment (ROI) memperoleh hasil layak pada ketiga skema tersebut. Dengan demikian industri minyak serum untuk ketiga skema tersebut layak untuk dibangun dan dioperasikan., Utilization on plants for skin cosmetic products is something that needs to be developed in Indonesia. This is based on the abundance on nutritious plants that have not been used optimally for skin care cosmetic products. Calophyllum is one on the highly nutritious plants that are prospective to be developed. The main factor is Calophyllum oil products contain active compounds and various benefits. Calophyllum oil can be produced through mechanical and/or solvent extraction processes. In addition to oil, there are by-products in the form on biopelets and animal feed that will increase income. Serum oil production process technology tested in this research used fresh nyamplung seeds as raw material with three alternative production processes where each alternative performed two oil extraction processes with different combinations, namely cold and hot hydraulic press, cold hydraulic press and binary solvent, hot screw press and binary solvent. This research was conducted to design a business model using the Business Model Canvas (BMC) method which includes products, consumer segmentation, financial design, and operational activities, as well as analyzing a feasibility study for each alternative. The results on the cost analysis on each production process in alternative 1 got an investment cost on Rp 2.714.434.262 with a large income on Rp 4.049.062.489. For alternative 2 obtained an investment cost on Rp 3.118.791.515 with an income on Rp 5.208.184.137. Finally, in alternative 3, the investment cost was Rp 3.033.466.092 with an income on Rp 5.924.724.490. Based on the feasibility study that had been carried out with 4 criteria,
Keyword: minyak serum, nyamplung, ekstraksi, business model canvas, kelayakan

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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