Judul: Pendugaan model fungsi produksi dan analisis efisiensi usaha penggemukan domba (studi kasus di peternakan domba tawakkal desa Cimande Hilir, kecamatan Caringin, kabupaten Bogor)
Abstrak: The fattening sheep farming is most profitable husbandry enterprise. The most important reason are, it only used a little capital and fastest to get break even point. The aim of fattening program is to get growth of body weight level and the production function model is an effective way to know it. In Tawakkal sheep farming, the best production function model that can be used is Cobb-Douglas mood.
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Judul: Analisis Efisiensi Produksi Usaha Penggemukan Domba Tawakal Farm Caringin Bogor pada Asal Daerah Bakalan yang Berbeda
Abstrak: This research is aimed to analyze the efficiency of sheep fattening production at Tawakal Farm, Caringin, Bogor. This research used three treatments with eight replication. The treatment was devided by the origin of the sheep’s seeds, which was the local sheep from Cicurug (West Java), Jampang (West Java), and Temanggung (Central Java). The sheep were given Brachiaria humidicola and tofu waste as feed. Average daily gain (ADG) and feed efficiency were observed. The result showed that sheep from Temanggung got the highest value of ADG (100.919±6.949 g/sheep) and the highest value of feed efficiency (0.113±0.008/sheep). The calculation of income analysis showed that the local sheep from Temanggung (Central Java) got the highest income (Rp 460 593±28 537.84/sheep) and the highest R/C ratio (1.63±0.05/sheep). In this study, the sheep from Temanggung (Jawa Tengah) which has cultivated at Tawakal Farm had the highest production efficiency.
Keyword: sheep fattening., seed origin, increasing body weight, income analysis, feed efficiency

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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