Judul: Uji Transportasi Ikan Maskoki (Carassius auratus Linnaeus) Hidup Sistem Kering dengan Perlakuan Suhu dan Penurunan Konsentrasi Oksigen
Abstrak: This research aimed to discover the optimum factors (sedation rate, sedation temperature, storage temperature, reduced O2 concentration, and period of transportation) influenced to survival rate during dry system transportation (static) of live goldfish. Observation on fish condition during sedation, packaging, unpacking, and refreshing process; toxicity test on filler; bulk density measurement on filler; water absorption of filler; and container efficiency were also performed. The results showed that the optimum sedation temperature is at 60C, the optimum storage temperature is at 180C, the best sedation rate is eight hours from normal temperature (± 270C) down to 60C, the best reduced O2 concentration is 0 % reduction in O2 concentration (package which was contained ±21% O2 concentration), and the longest period of transportation (static) is 24 hours by normal atmosphere packaging. The filler was known harmless for live goldfish after 24 hours of toxicity test. The bulk density of filler is 0.074 gram/cm3 and the capacity of water absorption of filler is 57.32% wet weight or 135.23% dry weight.
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Judul: Efektivitas Penambahan Zeolit, Karbon Aktif, dan Minyak Cengkeh dalam Transportasi Tertutup Ikan Nila BEST Oreochromis sp. dengan Kepadatan Tinggi.
Abstrak: Fish transportation was usually held at high density to efficient the transportation cost, but higher density of fish carried inside the container will be increase stress level of fish. Some stress will result in increased activity of fish physycology that could worst the water quality especially DO, CO2, and NH3. An attempt done to neutralize toxic ammonia that is by adding zeolite and active carbon to packing medium, and adding clove oil can condition the fish in a state of calm. Transportation is carried out for 24 hours and 20 days old maintenance with the packing of BEST tilapia fish seed 2-3 cm size with a density 700 fish/ and add the ingredients according to the dosage of 20 g of zeolite, 10 g of activated carbon. Treatment difference is the addition of clove oil dosage is 12 , 24 , 36 , and 48 . The results showed the addition of the treatment dose of clove oil 24 is more effective than other treatments with the SR of 93.36 %. It is also seen on the water quality better than other treatments, TAN 2.73±0.07, NH3 0.0137±0.0004, CO2 39.95±0, temperature 24.75±1.06, pH 6.98±0, and DO 2.20±0. Value of SR seed maintenance post treatment for 20 days was 97.12 %, higher than other treatments, with the rate of daily weight of 8.74 % and the cost for transportation of IDR 47.70, -.
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Judul: Invers dari Matriks Tridiagonal Jacobi
Abstrak: Suatu matriks berukuran n×n dinamakan matriks tridiagonal jika untuk . Karya ilmiah ini memberikan algoritma yang mudah untuk menemukan invers ( dari matriks tridiagonal Jacobi yang simetrik dan nonsimetrik. Setiap elemen pada matriks tridiagonal ini adalah bilangan real. Terdapat 3 lema dan 2 teorema untuk menentukan . Lema pertama menunjukkan persamaan utama dalam membuktikan lema-lema dan teorema-teorema selanjutnya. Invers dari matriks yang simetrik dibuktikan oleh lema kedua yang menunjukkan elemen-elemen baris ke- dari . Selanjutnya, lema kedua dilengkapi dengan teorema pertama yang menunjukkan elemen-elemen dengan . Invers dari matriks yang nonsimetrik dibuktikan oleh lema ketiga yang menunjukkan elemen-elemen dengan dan elemen-elemen dengan dibuktikankan oleh teorema kedua.
Keyword: symmetric, nonsymmetric, matrix