Judul: Study of Addition of Different Additives in  Closed System Transportation Media Against Survival Rate Catfish Seeds  Pangasius sp.
Abstrak: Ikan patin Pangasius sp. merupakan komoditas budidaya dengan nilai ekonomi dan tingkat konsumsi yang tinggi, sehingga diperlukan teknik transportasi ikan yang baik untuk penyebaran benihnya. Sistem transportasi yang digunakan pada penelitian adalah transportasi benih ikan patin dengan sistem tertutup. Penambahan bahan aditif dalam media transportasi perlu dilakukan karena dapat menunjang kondisi ikan yang ditransportasikan dengan cara menurunkan metabolisme dan mempertahankan keadaan lingkungan media selama pengangkutan berlangsung. Penelitian dilakukan dengan metode studi pustaka terkait transportasi benih ikan patin dengan sistem tertutup. Bahan aditif yang dievaluasi adalah a. bahan berbentuk padatan, yaitu zeolite, arang aktif, dan garam yang berperan sebagai stabilizer kualitas air dan b. bahan yang berbentuk cairan, yaitu akar tuba, minyak cengkeh, dan minyak sereh yang berperan sebagai anestesi ikan. Hasil terbaik berdasarkan literatur adalah kombinasi penambahan bahan stabilizer kualitas air dan anestesi dengan kepadatan tinggi dan durasi waktu transportasi yang panjang efektif meningkatkan sintasan pascatransportasi., Catfish Pangasius sp. is a cultivated commodity with a high economic value and high consumption, so good fish transportation techniques are needed for the spread of seeds. The transportation system used is the transportation of catfish seeds with a closed system. The addiction of additives in transportation media needs to be done because it can support the condition of fish transported by lowering metabolism and maintaining the state of the media environment during transportation. The research was conducted by literature study method related to catfish seeds transportation with closed system. Additives evaluated are a. solids in the form of zeolite, activated charcoal and salt that serves as a water quality stabilizer and b. materials in the form of liquids namely tubal roots, clove oil and citronella oil that acts as fish anesthesia. The best result based on the literature is a combination of addition of water quality stabilizer and anesthesia with high density and long duration of transportation time effectively improving post-transport survival rate.
Keyword: additives, closed systems transportation, survival rate, water quality

Judul: Kelangsungan hidup benih ikan patin Pangasionodon sp. ukuran 1 inci pasca pengangkutan menggunakan sistem tertutup dengan media bersalinitas 1, 2 dan 3 ppt.
Abstrak: Pangas catfish is one of aquaculture main commodity in Indonesia and a commodity with significant increase production during 2007-2008. Suppliers often encounter a problem from the low survival rate during the fry transportation which is caused by poor water quality. Therefore, a research to increase the survival rate on closed system transportation as an effort to increase profit on fish marketing is needed. Osmoregulation (osmotic pressure) is a parameter changed during transportation. The change itself can be balanced with salinity addition, which in turn affect the organism osmoregulation. Determining the optimal salinity will affect fry survival rate during transportation. The research was conducted between April 2010 and May 2010 at Laboratory of Production Technique and Management Aquaculture, Aquaculture Department, Faculty of Fisheries and Marine Science, Bogor Agriculture University. Water quality parameters was measured at Environmental Laboratory, Aquaculture Department, Faculty of Fisheries and Marine Science, Bogor Agriculture University and osmotic pressure measurement was conducted at Embriology Laboratory, Veterinary Faculty, Bogor Agriculture University. Fish rearing pre and post transportation treatment was conducted at Yohanes Tropical Fish Farm, Cogreg Village, Parung, Bogor. This research used 1 inch fry with 2,58±0,03 cm average length and average weight 0,21±0,02 gram provided from Cogreg Village, Parung, Bogor Regency, West Java. The fry was transported in 12 Poly Ethylene (PE) plastic bag filled with 1,25 litre water. Whereas post transportation fish located in 12 aquarium filled with 144 litre water at 30 cm water height. During fry rearing, the fry were fed on shrimp feed (protein 40%) twice a day at morning and afternoon with at satiation method. Water at the aquarium was changed by 10% everyday (5% in the morning and 5 % in the afternoon). Results on salinity addition on transportation media after 3 days post transportation showed survival rate 90%; 91%, 94,67% and 96,33%; and market profit Rp 6.259.935,00; Rp 7.272.935,00; Rp 8.731.315,00; and Rp.9.477.555,00 respectively. Salinity addition on the transportation water medium 0 ppt, 1 ppt, 2 ppt and 3 ppt affect survival rate of pangas catfish fry (P>0,05). Salinity at 3 ppt gave the highest fry survival rate and market profit
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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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