Judul: Analisis Pendapatan USahatani Pembenihan Lele Dumbo dan Sangkuriang di Desa babakan Kecamatan Ciseeng Bogor
Abstrak: Fishery is one of the sectors that can improve indonesian welfare. Evident from the value of Gross Domestic Product increased by 21.55% per year from 2004 until 2012. The fisheries sector is classified into two categories namely fisheries and aquaculture. Catfish is one of the prime comodities of aquaculture. Babakan, is one of the catfish seed production centers in Bogor. There are two varieties of seed that developed in Babakan, Dumbo in UPR Jumbo Lestari and Sangkuriang in Kubang Sejahtera. The development of hatchery technology that marries the second and sixth derivative of Dumbo’s catfish and expectation to be able to produce more products led to the emergence of new varieties namely sangkuriang. The analysis used R / C ratio and chi-square. The results showed that the average income per hectare dumbo are greater than sangkuriang with a value of the R / C ratio reached 1.40 for Dumbo and sangkuriang only at 1.16. Meanwhile, from the results of different test chi square analysis, X2 value calculated for the cash cost of 36,5325 and 35.0972 for a total cost greater than the X2 table at 23.685.
Keyword: R/C ratio dan Chi Square, Income, Sangkuriang’s catfish hatchery, Dumbo’s catfish hatchery

Judul: Analisis Tata Niaga Usaha Pembenihan Ikan Lele Sangkuriang Pada Unit Pembenihan Rakyat Bina Tular Desa Gadog Kabupaten Bogor.
Abstrak: Sangkuriang catfish is one of aquaculture commodity which is widely cultivated in Bogor. Its production was the highest in West Jawa region. The fish has a physical characteristic of smooth body, long body, not scaly like an ordinary fish, and fused with the caudal fin. UPR Bina Tular or commonly called the People's Hatchery Units established by few farmers. At first UPR Tular is a farmer group in hatchery, but in 2007 UPR Bina Tular changed into individual businesses owned by Mr.Endang. The difference in price at the farm level and the consumer make the analysis needed to be conducted. The anlysis methods used are marketing function, marketing institution, market structure, profit and cost ratio, farmer’s share and market conduct. The results show that an efficent trading system channels are channels I and II. Efficient trading system channel is a channel that has the smallest valueof the margin’s share and the biggest value of the largest farmers.
Keyword: Efficiency, UPR BINA TULAR, Trading system

Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik.
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik