Judul: Kelayakan Usaha Tempe Skala Kecil dan Menengah di Kecamatan Baleendah Kabupaten Bandung
Abstrak: Tempe is one of many Indonesian traditional food that highly nutritious. The aim of this research was to analyze the feasibility of the 2 scales of tempe business wich are above 100 kg/day scale of business and below 100 kg/day scale of business. Analysis method used was non financial analysis method such as market aspects, technical aspects, management aspects, and legal aspects, social and environmental aspects. Financial analysis was determined by some criterias such as NPV, IRR, Net B/C and Payback Period. Switching value analysis conducted to measure the change of the price increase and decrease in soybean production. The result showed that both of the two scales of tempe business were feasible. The result of switching values analysis showed that on both scales the decreasing of production had more impact on/ was more affecting business feasibility than that of the increasing of soybean price.
Keyword: tempe, price increasing of soybeans, feasibility

Judul: Factors Affecting Production and Profit of Tempe Business in Pejaten Village, Kramatwatu District, Serang Regency
Abstrak: Konsumsi olahan kedelai seperti tempe cukup tinggi di Indonesia, dimana salah satu sentra produksi tempe berada di Desa Pejaten, Kecamatan Kramatwatu. Kedelai yang digunakan dalam pembuatan tempe adalah kedelai impor yang sering mengalami kenaikan harga. Maka menjadi penting apakah dengan harga bahan baku kedelai yang semakin naik, usaha tempe masih menguntungkan. Penelitian ini bertujuan untuk menganalisis faktor-faktor yang memengaruhi produksi, menganalisis struktur biaya usaha, dan menganalisis keuntungan usaha tempe di Desa Pejaten. Responden yang digunakan adalah keseluruhan perajin tempe di Desa Pejaten yakni sebanyak 25 orang. Metode analisis menggunakan analisis fungsi produksi, perhitungan keuntungan usaha, dan rasio R/C. Pengolahan data dibantu dengan program SPSS 26 dan Microsoft Excel. Hasil penelitian menunjukkan bahwa secara parsial, hanya variabel kedelai (X_1) yang berpengaruh nyata dan poisitif terhadap produksi tempe. Adapun komponen biaya terbesar dalam usaha tempe adalah biaya pembelian kedelai (80,53%), upah tenaga kerja (9,06%), dan biaya pembelian kemasan plastik (3,53%). Sedangkan rata-rata keuntungan usaha tempe yang diperoleh dalam sebulan adalah sebesar Rp. 4,308,824.71 dengan R/C rasio sebesar 1.14, maka usaha tempe sudah menguntungkan., Consumption of processed soybeans such as tempeh is quite high in Indonesia, where one of the centers for tempeh production is in Pejaten Village, Kramatwatu District. Soybeans that used in making tempeh are imported soybeans, which often had price increases. So it becomes important whether the price of soybean is increasing, the tempe business is still profitable. This study aims to analyze the factors that influence production, analyze the cost structure of the business, and analyze the profits of the tempeh business in Pejaten Village. Respondents used were all tempe craftsmen in Pejaten Village, as many as 25 people. The method of analysis uses the analysis of the production function, the calculation of operating profits, and the R/C ratio. Data processing is assisted by SPSS 26 and Microsoft Excel programs. The results showed that partially, only soybean variable (X_1) had a significant and positive effect on tempe production. The largest cost components in the tempe business are the cost of purchasing soybeans (80.53%), labor wages (9.06%), and the cost of purchasing plastic packaging (3.53%). Meanwhile, the average profit of tempeh business in a month is Rp. 4,308,824.71 with an R/C ratio of 1.14, then the tempe business is already profitable.
Keyword: cost structure, production function, R/C ratio

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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