Judul: Analisis debit dengan menggunakan Model Tangki pada Sungai Cipasauran, Banten
Abstrak: PT. Krakatau Tirta Industri (PT.KTI) merupakan salah satu perusahaan di Kawasan Cilegon yang memasok air bersih untuk sektor industri dan non-industri dengan kapasitas terpasang sebesar 2.00 m3/s. Permintaan akan pasokan air terus bertambah seiring telah dibangunnya berbagai industri baru di Kawasan Industri Krakatau Cilegon. PT. KTI melakukan berbagai alternatif penambahan air yang memungkinkan untuk menanggulangi kekurangan air baku yang terjadi, diantaranya dengan menambah pengambilan air dari Sungai Cipasauran. Tujuan dari penelitian ini adalah memodifikasi model pendugaan debit Sungai Cipasauran berdasarkan model tangki dan mengetahui ketersediaan air berdasarkan model tangki tersebut. Pelaksanaan penelitian dilakukan dua tahap, yaitu tahap pertama berupa pengumpulan data sekunder, serta tahap kedua berupa tahap analisis. Data yang digunakan untuk proses optimasi adalah data hujan dan debit sungai harian dengan periode Juli 2007-Juni 2008. Hasil optimasi model untuk periode tersebut menghasilkan nilai R sebesar 0.85, Mean Absolute Error sebesar 1.56, Root Mean Square Error sebesar 2.69, dan LOG sebesar 0.11, dan hasil validasi model untuk periode tersebut menghasilkan nilai R2 sebesar 0.72. Berdasarkan analisis yang telah dilakukan, jumlah debit air yang dapat dimanfaatkan dari Sungai Cipasauran berdasarkan model yang telah dibuat untuk periode Juli 2007-Juni 2008, Juli 2008-Juni 2009, dan Juli 2009-Juni 2010 berturut-turut sebesar 13,412,343 m3/tahun, 9,078,351 m3/tahun, dan 8,713,695 m3/tahun.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Cipasauran watershed, tank model, PT. Krakatau Tirta Industri

Judul: Analisis Debit dengan Menggunakan Model Tangki pada Sunga i Cipasauran, Banten
Abstrak: PT. PT. Krakatau Tirta Industri (PT.KTI) is one of the companies in Cilegon areas that supplies clean water for industry and non-industry sectors by the capacity 2.00 m3/s. The demand of water supply has increased during another industry were developing in Krakatau Industrial Estate Cilegon. PT. KTI makes Cipasauran River as an alternative in addition of water shortages that occurs. The objectives of this study were to modified river discharge model of Cipasauran based on tank model and to know water availability based on the model. The study was done in two steps. The first step was collecting secondary data, and the second step was analyzing. The data which were used in optimization were daily rainfall and daily river discharge data during July 2007-June 2008. Optimization results of the tank model on those period showed R was 0.85, Mean Absolute Error was 1.56, Root Mean Square Error was 2.69, and LOG was 0.11. and validation results of the tank model on those period showed R2 was 0.72. Based on the analysis, water discharge which could be utilized on Cipasauran River based on the tank model built on July 2007-June 2008, July 2008-June 2009, and July 2009-June 2010 were 13,412,343 m3/year, 9,078,351 m3/year, and 8,713,695 m3/year
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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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