Judul: Produksi Pupuk Organik dari Pengolahan Limbah Ruminansia Besar di Rumah Pemotongan Hewan dengan Cacing Tanah
Abstrak: Slaughterhouse waste can give a negative effect on the environmental balance. Therefore, the processing of waste into a product needs to be done, such as vermicompost product. This study aimed to analyze the potential for the production of organic fertilizer from slaughterhouse waste treatment by earthworms as decomposer. In addition, this study also to analyze the potential for the application in the field of agriculture and plantation. This study was done in Perwira Street No 89, Dramaga, Bogor. The data used in this research was primary and secondary data which includes earthworms maintenance data, statistical data of the number of cattle slaughtered in slaughterhouse, palm plantation area in smallholder plantations and large plantation area, and rice harvested area. Traits measured were earthworm population, the number of slaughterhouse waste, the amount of organic fertilizer, and organic fertilizer needs of palm and rice. ARIMA modeling performed to obtain the curve of the rate of production of organic fertilizers and regression analysis was for get the equation of organic fertilizer needs of palm year-1. The results showed that the faeces and rumen contents of cattle in slaughterhouses throughout Indonesia is able to produce 43 107.84 tonnes in 2013 and worms capable of producing 1 436.93 tons of biomass earthworms and vermicompost and 28 020.09 tonnes. Vermicompost production of slaughterhouse waste in 2013-2014 was much lower than the needs of oil palm plantations, but is able to fill about 50% of the field.
Keyword: earthworm, organic fertilizer, palm, rice

Judul: Protein Cacing Tanah Sebagai Sumber Protein Alternatif dari Pengolahan Limbah Ruminansia Besar.
Abstrak: Population growth in Indonesia is very rapidly led to increased demand for animal protein. Hence the need for alternative protein sources to meet the needs of the human protein. Earthworms contain high protein so it can be used as an alternative protein source. Livestock waste which if not handled properly can damage the environment. Therefore, the waste from livestock can be used as feed worms. The purpose of this study was to determine the potential of earthworms as a source of alternative porotein by utilizing the processing of livestock waste as feed worms. This study was done in Raya Dramaga street Km 7, Village Marga Jaya, District Dramaga, Bogor regency. The data used in this research is secondary data which include statistical data of the number of cattle in Indonesian, census, production and consumption of livestock products. Variables measured is the population of worms, the worms feed sufficiency, protein production livestock products, and protein consumption of livestock products. The results showed that the worms can be used as an alternative source of protein and livestock waste can meet the needs of feed worm.
Keyword: earthworm, ruminant waste, protein

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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