Judul: Kapasitas Asimilasi Beban Pencemar Limbah Cair Tahu-Tempe dan Pengaruhnya pada Makroavertebrata Benthik di Sungai Ancar, Nusa Tenggara Barat
Abstrak: Influence entry of organic material exceeding waters assimilative capacity can be seen at physical, chemical and biological water quality. Assessment of the influence of assimilative capacity exceed can using macro invertebrates benthic. The aim of this study are : 1) to know existence, total loading and quality of tofutempe making waste; 2) to know assimilative capacity of Ancar river and 3) to know status contamination of Ancar river with macro invertebrates benthic approach. Station 2, 3 and 4 get waste input from making of tofu-tempe directly. Total maximal pollutant burden from waste equal: BOD (9,10.10-2 ton/day), COD ( 3,58.10-1 ton/day) and TSS (2,54.10-2 ton/day). Measurable waste quality as follows: pH (5-7), BOD (639-3744 mg/l), COD (2283-13893 mg/l) and temperature (30-50 O C). Ancar river status is over capacity, hence concentration of BOD enabling admission is equal to 153,12 mg/l/day. Based on SIGNAL 2, Ancar river is included in medium to weight polluted waters, that marked by decline family number and loss of types benthic in clean waters.
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Judul: Pollution Burden Analysis and Assimilation Capacity of Cidurian River Banten Province
Abstrak: The river has the ability to clean itself of the burden of pollution naturally which is known as the capacity of assimilation. Incoming load exceeds the capacity of assimilation would lead to a decrease in the quality of the river until the river functions decline. This research aims to analyze the water quality of Cidurian River, analyze the contribution of pollution loads entering River Cidurian, and knowing the assimilation capacity of the stream. Research results show that the water quality, starting from the upstream to downstream concentrations of BOD, TSS, COD and E. coli are likely to exceed the standard of quality. Contribution to the total burden of polluters from certain sources (point source) in DAS Cidurian 2,4 tons/month BOD, COD 4,3 tons/month, TSS 2,26 tons/month. The contribution burden of polluters undefinable (non point source) based on the analysis of land use from agricultural sector BOD 206,76 tons/month,TSS 24,13 ton/month, based on the analysis of the population of each sub DAS, domestic sector have 1.374 tons/month of BOD, COD 1.890 tons/month, TSS 1.305 tons/month and E.coli 1,02 E 16 tons/month. Total contribution burden of polluters undefinable (non point source) parameters BOD 1.580 tons/month, COD 1.890 tons/month, TSS 1.324 tons/month, more dominant compared to certain sourced (point source). Capacity of assimilation to the parameters of TSS 22.901,55 tons/month, BOD 2.347,83 tons/month, COD 24.208,33 tons/month, E.coli 424.629,90 tons/month. Overall value of assimilation capacity is smaller compared to the burden of pollution of the river, resulting in the organic matter pollution experienced TSS, BOD, COD and E.coli. The high contribution to the burden of domestic source of polluters and agriculture, as well as the capacity of assimilation to consider in an attempt to control water pollution.
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Judul: Formulasi Algoritme Operasi Grup Jacobian Kurva Hyperelliptic ...
Abstrak: Dalam geometri aljabar, kurva hyperelliptic merupakan bentuk umum dari kurva elliptic. Kurva ini apabila dikenakan pada suatu lapangan berhingga akan membentuk suatu grup siklik. Pada kriptografi, khususnya enkripsi kunci publik, grup siklik yang dibangkitkan oleh kurva elliptic sudah banyak diteliti. Bahkan untuk kurva ini sudah memiliki standar oleh National Institute of Standard and Technology (NIST) Amerika. Sedangkan, untuk grup yang dibangkitkan oleh kurva hyperelliptic masih memiliki kekurangan dalam hal komputasinya. Tujuan dari penelitian ini adalah mengkonstruksi suatu lapangan berhingga pada , memilih kurva hyperelliptic atas lapangan hingga yang memenuhi kriteria keamanan untuk kriptografi, dan membuat formulasi operasi grup kurva hyperelliptic menggunakan algoritme Cantor. Dalam merekonstruksi lapangan hingga, terlebih dahulu tentukan dimensi dari lapangan hingga tersebut dan polinomial tak-teruraikan. Kemudian dipilih kurva hyperelliptic atas lapangan tersebut. Pada penelitian ini, kurva yang dipilih adalah = + + dengan lapangan hingga . Berdasarkan kurva yang dipilih, akan dibentuk suatu operasi grup dengan menggunakan algoritme Cantor, sehingga menjadi lebih aritmatik. Eksplorasi kurva hiperelliptic dilakukan untuk mengetahui keamanan dari kurva yang dipilih. Dengan menyusun algoritme operasi grup dari kurva yang dipilih, diperoleh perhitungan yang lebih aritmatik dan dapat diimplementasikan pada kriptografi kunci publik. Dari segi keamanan kurva telah memenuhi standar sehingga tahan terhadap serangan-serangan seperti Poligh-Hellman, Polard- , ataupun Frey-Ruck secara teorema.
Keyword: algoritme Cantor, kriptografi, kunci publik, kurva hyperelliptic, operasi grup