Judul: Optimasi Pemanfaatan Air Dengan Program Linear di Saluran Tarum Barat
Abstrak: The problems of water resources is fluctuation where there is drought in the dry season and floods during the rainy season. One effort to optimize the utilization of limited water resources while the community needs for water has increased is the management of water in the main channel with the method of linear programming (LP) that can distribute water at its optimum. So needed formulate mathematical models and optimize the water demand for agricultural, domestic and industry in West Tarum Canal. The data required in this study are the data of agricultural land area, population and industry that utilizes water from the West Tarum Canal. Water needs in agricultural research is set to 0,86 liters/sec/ha, the domestic equivalent to 120 liters/person/day or 3,6 m3/month and the industry of 350 m3/day or 10.500 m3/month. Debit is included in this optimization is the monthly average discharge West Tarum Canal. Optimization is done by determining the proportion of the allocation of water resources, that is for domestic 26,3%, agriculture 71%, and the rest of the industry at 2,7%. Based on the results of the optimization of agricultural land area, population, and the industry is 12.486 ha, 6.560.099 peoples, and 231 industries and with revenues amounting to IDR 295.714.500,00.
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Judul: Model simulasi optimasi pengelolaan air irigasi untuk tanaman padi dan palawija
Abstrak: Rancangan linier atau Linear Programming merupakan salah satu cara untuk mengoptimasikan pendayagunaan sum- berdaya yang terbatas, seperti halnya ketersediaan air dan luasan suatu areal pertanaman. Namun pekerjaan ini bila dilakukan secara tabulasi atau perhitungan tangan memerlu- kan waktu dan tenaga yang banyak serta memerlukan keteli- tian yang tinggi, maka dengan bantuan komputer dapat dibuat suatu model simulasi yang dapat menyelesaikan salah optimasi tersebut dengan cepat, tepat dan murah. ma- Masalah khusus ini bertujuan membuat suatu model simulasi dengan bantuan komputer yang dapat menghasilkan rumusan pengelolaan air irigasi yang efisien dan seefektif mungkin, berupa suatu pola tanam yang meliputi penentuan urutan jenis tanaman dalam setahun, rencana masa tanam, dan luasan areal yang maksimal dari masing-masing pola tanam. Dari hasil program Model Simulasi Optimasi Pengelo- laan air Irigasi Untuk Tanaman Padi dan Palawija (MOSIOLA- PAJA) didapat dua rumusan pengelolaan air irigasi yang optimum ...
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Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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