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: 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 nonindustri 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 jersebut. Pelaksanaan penelitian dilakukan dua tahap, yaitu tahap pertama berupa pengumpulan data sekunder, serta tahap kedua berupa tahap analisis. Data yang gunakan 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 lakukan, jumlah debit air yang dapat dimanfaatkan dari Sungai Cipasauran berdasarkan model yang telah dibuat untuk periode Juli 2007-Juni 2008, Juli 2008-Himi 2009, dan Juli 2009-Juni 2010 berturut-turut sebesar 13,412,343 m³/tahman, 9,078,351 m³/tahun, dan 8,713,695 m³/tahun…
Keyword: Cipasauran watershed, tank model, PT. Krakatau Tirta Industri

Judul: Construction of Strongly Optimal Binary Linear Code with Minimum Distance 9 and 11
Abstrak: A binary linear code of length n over q F is a subspace of n q F . A code has three parameters that attached to it, namely length, dimension, and minimum distance. A code with length n, dimension k and minimum distance d is often called [n, k, d ]-code. Usually, when two parameters are given, then we want to find a code that has the best value for the last parameter. Based on Gilbert- Varshamov bound, if a [n, k, d ]-code exists and can not be expanded, we call it a strongly optimal code. In this paper, we construct strongly optimal code with minimum distance 9 and 11. In constructing the code, we created a theorem and algorithm based on Gilbert-Varshamov bound before we implement the algorithm to MAPLE programming language. Because of computational limitations, the program can only construct up to k = 10 for d = 9 and k = 12 for d = 11.
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