Judul: Factory Equipment and Layout Design of Miniplant Scale Palm Oil Mill
Abstrak: Pabrik Kelapa Sawit (PKS) di Indonesia umumnya memiliki kapasitas produksi yang besar dan menerapkan standar buah yang tidak bisa sepenuhnya dipenuhi oleh petani swadaya. Selain itu, PKS besar memiliki letak yang jauh dari perkebunan milik petani swadaya sehingga memerlukan tambahan biaya distribusi. Salah satu solusi yang dapat dilakukan untuk menyelesaikan permasalah tersebut adalah dengan mendirikan pabrik kelapa sawit skala miniplant. Penelitian ini bertujuan menentukan pemilihan peralatan yang dibutuhkan oleh miniplant sawit dan membuat desain peralatan serta tata letak pabrik. Penelitian ini dilakukan dengan pendekatan desain fungsional dan struktural yang terdiri dari observasi, wawancara, studi literatur, analisis data, gambar teknik peralatan, serta membuat rancangan tata letak pabrik. Miniplant sawit menggunakan 14 jenis peralatan yang terdiri dari jembatan timbang, loading ramp, conveyor, vertical sterilizer, thresher, digester, screw press, ripple mill, nut and fiber separator, vibrating screen, vertical clarifier tank, vacuum dryer, tangki berpengaduk, dan storage tank. Desain peralatan yang dibuat telah disesuaikan sesuai dengan kapasitas produksi masing-masing alat. Luas keseluruhan yang dibutuhkan untuk proses produksi pada miniplant sawit adalah sebesar 902 m2., Palm oil mills in Indonesia generally have large production capacities and apply their own fruit standards that cannot be reached by independent farmers. Large palm oil mills are usually located far from farms owned by independent farmes, thus requiring additional distribution costs. One solution that can be done to overcome these probelms is to build miniplant scale palm oil mill. This research purpose is to determine the selection of equipment needed by palm oil miniplant and to design equipment along with factory layouts. This research was conducted with a functional and structural design that consisted of observations, interviews, literature studies, technical drawings of factory equipment, and making factory layout design. Palm oil miniplant use 14 types of equipment consisting of a weighbridge, loading ramp, conveyor, vertical sterilizer, thresher, digester, screw press, ripple mill, nut and fiber separator, vibrating screen, vertical clarifier tank, vacuum dryer, stirred tank, and storage tank. Factory equipment design has been adjusted to the production capacity of each piece of equipment. The total area required for the production process of the palm oil minipant is 902 m2.
Keyword: equipment design, factory layout, palm oil mills

Judul: Financial Feasibility Analysis and Business Model of  Palm Oil in Mini-Scale Palm Oil Mills
Abstrak: Pabrik kelapa sawit di Indonesia biasanya berada ditengah perkebunan milik perusahaan besar. Petani swadaya yang ingin menjual hasil panen sawit harus menjual ke pabrik milik perusahaan yang letaknya jauh. Miniplant sawit yang berkapasitas 2 ton per jam dapat dibangun di sekitar kebun dengan jarak yang lebih dekat. Analisis kelayakan finansial dan model bisnis perlu dilakukan untuk proyek miniplant sawit. Perhitungan finansial proyek ini dilakukan dengan menghitung rencana (skema) produksi yang terdiri dari skema 1 yaitu menggunakan 20% CPO dan skema 2 menggunakan 90% CPO yang dihasilkan menjadi Minyak Sawit Merah (RPO) dan minyak goreng. Analisis finansial terbaik yang didapat yaitu model produksi 90% CPO untuk skema 1 yaitu NPV sebesar Rp217,914,929, IRR sebesar 16.2316%, PBP sebesar 7.20 tahun, dan B/C ratio sebesar 1.30 dan untuk hasil kriteria untuk skema 2 yakni IRR sebesar 17.5671%, NPV sebesar Rp458,882,360 PBP sebesar 6.99 tahun dan B/C ratio sebesar 1.31., Palm oil mills in Indonesia are usually located in the middle of plantations owned by large companies. Independent smallholders who want to sell their palm oil crops have to sell to a company-owned mill that is far away. An oil palm mini plant with a capacity of 2 tons per hour can be built around the plantation at a closer distance. Financial feasibility analysis and business models needs to be carried out for the oil palm mini plant project. The financial calculation of this project is carried out by calculating the production plan (scheme) consisting of scheme 1 which uses 20% CPO and scheme 2 uses 90% of the CPO produced into Red Palm Oil (RPO) and cooking oil. The best financial analysis obtained is the 90% CPO production model for scheme 1, namely NPV of IDR 217,914,929, IRR of 16,2316%, PBP of 7.20 years, and B/C ratio of 1.30, and for the results of the criteria for scheme 2, namely IRR of 17,5671%, NPV of Rp458,882,360 PBP of 6.99 years and B/C ratio of 1.31.
Keyword: Analisis finansial, Mini plant sawit, Model bisnis, business model, Financial analysis, Palm mini plant

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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