Judul: Analisis Nilai Tambah dan Keuntungan pada Kerajinan Kayu Desa Pulau Betung Provinsi Jambi
Abstrak: Pulau Betung village Jambi Province has small scale wood processing industry, converting wood raw material into woodcraft products. The industry has been supported by the availability of raw material supplied by the private forest. Wood species used for woodcrafting are Gluta renghas, Fagraea fragrans, and Peronema canescens and within one year the volume of wood as a raw materials are 160.313 m3. Processing activities have been carried out manually, using traditional and semi modern tools. Production activities consist of three stages, which are sculpting, refining, and finishing activities. Processing requires the costs, commonly called production costs. Woodcraft production costs consist of raw material, labor, and other input costs. Other input costs are auxiliary, electricity, equipment maintenance, and depreciation costs. These production activities generate added value and profit. During one year woodcrafter has produced 21 kinds of products, which each product has it’s own added value and profit. The biggest added value to the raw material is gained by guest chair with dragon and bird pattern which is Rp22 267 942/unit or Rp9 728 240/m3 and the lowest added value to the raw material is gained by stone ashtray which is Rp4 176/unit or Rp1 391 949/m3. Those added value generated from these 21 products range from 27.839% to 95.419% . The biggest profit is gained by guest chair with dragon and bird pattern which is Rp14 767 942/unit or Rp6 451 700/m3 and the lowest profit is gained by the small arowana fish ornament which is Rp-81 553/unit or Rp-3 262 123/m3. Those generated profits range between -81.553% and 76.228%.
Keyword: woodcraft., profit, cost, added value

Judul: Analisis Nilai Tambah Produk Kerajinan Bambu di Kabupaten Kebumen
Abstrak: Sebagai tanaman hutan non kayu, pemanfaatan bambu untuk produk keperluan rumah tangga dan kerajinan tangan semakin berkembang. Pengembangan dan inovasi produk tersebut memberikan nilai tambah dari produk yang berasal dari bambu sehingga dapat meningkatkan harga jual. Penelitian ini bertujuan menganalisis struktur biaya dan nilai tambah kerajinan bambu di Kabupaten Kebumen. Penelitian ini menggunakan data dari dua usaha pengolahan bambu dengan output berbeda yang dipilih secara purposive. Analisis nilai tambah menggunakan metode Hayami. Hasil penelitian menunjukkan bahwa semakin besar kapasitas produksi dan harga produk menghasilkan keuntungan dan nilai R/C yang tinggi. Hasil penelitian juga menunjukkan bahwa usaha yang memiliki nilai ouput terbesar memiliki nilai tambah tertinggi dengan produk kerajinan bambu yang memiliki nilai tambah, rasio nilai tambah, keuntungan dan tingkat keuntungan yang paling tinggi yaitu anyaman stoples.
Keyword: Hayami, kerajinan bambu, nilai tambah, struktur biaya

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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