Judul: Kajian Beban Pencemaran dan Daya Tampung Beban Pencemaran Sungai Ciliwung Hulu Segmen Kabupaten Bogor
Abstrak: Water quality (KA) of the upstream of Ciliwung River was important affecting the efforts to comply water necessities for community’s activities. Thus there need a study to determine the change of KA due to waste discharge (BP) that flow into stream. The objectives of this research were to identify river’s utilization, source of pollutant, to evaluate condition of river’s KA, and to calculate BP and BP capacity (DTBP). Literature review method was used to collect secondary data that consisted of KA, demography, tourism, total of livestock, total area of farming land and total of industry. Primary data were collected by using field observation and interview to the community. Used analysis method was Rapid Assessment of Sources of Air, Water and Land Pollution to determine status quality of water and BP; meanwhile DTBP was calculated based on BMA class I (PP No 82 of 2001) and utilization of river and source of pollutant were analyzed descriptively. Main source of BP was from river utilization by community which includes domestic, animal husbandry and farming wastes. Main BP couldn’t be contained anymore due to limited DTBP of river. Total of BP excesses were, respectively, 7.3356 ton month¹ BOD, 1005.82 ton month¹ COD and 478.29 ton month¹ TSS. Generally, quality status of upstream Ciliwung River’s water in 2008-2012 was ranged between moderately polluted to fine; it could be seen from parameters such as BOD, COD, phosphate, DO, TSS and total coli that have been exceding BMA.
Keyword: water quality, source and waste discharge, capacity

Judul: Kajian beban pencemaran dan daya tampung pencemaran sungai Ciliwung di Segmen kota Bogor
Abstrak: Perkembangan kependudukan di DAS Ciliwung Segmen Kota Bogor mendorong peningkatan kebutuhan hidup sehingga bermunculan berbagai macam industri dan peternakan. Sungai Ciliwung sebagai ekosistem terbuka menerima beban pencemaran melalui saluran-saluran air dari berbagai sumber pencemar seperti limbah rumah tangga, industri, peternakan dan pertanian. Disamping itu, pemanfaatan air sungai Ciliwung oleh masyarakat juga menyebabkan penurunan kualitas dan mutu air sungai. Untuk itu perlu dilakukan inventarisasi dan pemetaan industri-industri serta peternakan dengan menggunakan SIG sebagai dasar upaya pengendalian pencemaran Sungai Ciliwung secara keseluruhan. Penelitian ini dilakukan di wilayah DAS Ciliwung segmen Kota Bogor. Pengambilan data sekunder pada Februari - Maret 2010, sedangkan data primer ke lapangan dilaksanakan pada bulan Oktober - November 2010. Tujuan penelitian ini adalah mengidentifikasi sumber-sumber pencemar di DAS Ciliwung Segmen Kota Bogor, mengevaluasi perkembangan kondisi mutu air Sungai Ciliwung dari hulu ke hilir di segmen Kota Bogor, menghitung besar beban pencemaran setiap sumber-sumber pencemar, menghitung besar daya tampung beban pencemaran. Metode yang digunakan untuk data sekunder adalah inventarisasi data dari beberapa sumber/instansi meliputi: data kualitas air, debit sungai, data kependudukan, dan peta tutupan lahan kota bogor, sedangkan untuk data primer adalah observasi lansung ke industri-industri dan peternakan serta wawancara masyarakat mengenai persepsi dan perilaku mereka terhadap sumberdaya air Sungai Ciliwung.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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