Judul: Evaluation of Water Quality and Performance of Clean Water Treatment Plant at WTP Ciapus Dramaga IPB Campus
Abstrak: Air memiliki peran penting bagi kelangsungan hidup semua makhluk hidup di bumi ini. Agar air layak untuk dikonsumsi, maka harus melalui proses Water Treatment Plant (WTP). IPB memiliki berbagai sumber air yang berasal dari dua WTP, yaitu WTP Cihideung dan WTP Ciapus. Penelitian ini bertujuan untuk mengevaluasi kualitas air serta mengevaluasi kinerja WTP Ciapus. Penelitian ini dilakukan dalam dua tahap, tahap pengumpulan dan pengambilan data dan tahap pengolahan data. Lokasi penelitian ini di WTP Ciapus, Kampus IPB Dramaga, Bogor, Jawa Barat. Kualitas air yang dihasilkan oleh Water Treatment Plant Ciapus masih cukup baik, suhu terendah dan tertinggi adalah sebesar 25,8oC dan 27,3oC, nilai TDS tertinggi adalah 99,3 mg/l, kadar sulfat dan kadar nitrit tertinggi adalah sebesar 36,143 mg/l dan 0,0678 mg/l, serta untuk pH masih berada pada rentang 6,5-7,2, sedangkan pada parameter kekeruhan masih terdapat nilai di atas 5 NTU. Hasil evaluasi kinerja unit didapat beberapa nilai parameter yang belum sesuai dengan kriteria desain, yaitu waktu detensi dan gradien kecepatan pada koagulasi, nilai beban pelimpah dan waktu tinggal pada sedimentasi, kecepatan penyaringan serta kecepatan pencucian pada unit filtrasi, sedangkan pada unit flokulasi sudah sesuai dengan baku mutu.
Keyword: Water Treatment Plant, water quality evaluation, unit performance evaluation

Judul: Evaluasi Kinerja Instalasi Pengolahan Air Bersih Unit 1 Sungai Ciapus di Kampus IPB Dramaga Bogor
Abstrak: Water is an important resource for human life needed continually in its daily activity. IPB uses river Cihideung and river Ciapus as the main water resource for fulfilling the campus water need. IPB has nine Water Treatment Plant (WTP). One of the WTP which is not optimally functioned enough is Unit 1 river Ciapus WTP with the capacity for about 20 liters/second. The aims of the research are to evaluate Ciapus WTP design criteria by comparing the design criteria based on SNI 6774-2008 concerning WTP package unit plan system. This research was carried out by collecting primary data, laboratory analysis, and based design criteria result evaluation. As a whole, it can be said that WTP performance still worked well enough because it had fulfilled the applicable criteria design, that is SNI 6774-2008. However, there were some units which had not yet fulfilled the criteria design, among others is coagulation, flocculation, and sedimentation, therefore it caused the process of water treatment was not quite optimal and the parameter above the quality fixed standard was able to indicate that there was a decrease of capability in reducing concentration.
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Judul: The Exploration of Discrete Logarithm over Finite Field GF(3m)
Abstrak: The security of many public~key algorithms is based on the problem of finding discrete logarithms. The generalized discrete logarithm problem is the following: given a finite cyclic group G of order n, a generator a of G, and an element fl E G, find the integer x, 0 ~ x ~ n - 1, such that 0: = fl. Algorithm for discrete logarithm problem focused on Menezes et al. (1997) that consist of exhaustive search algorithm, the baby-step giant-step algorithm, Pollard's rho algorithm, Pohlig-Hellman algorithm, and index-calculus algorithm. These algorithms are explorated to be used in discrete logarithm problem over finite field GF(3m ). The exploration also produces some algorithms, i.e. naif negative algorithm, baby-step mother-step algorithm, baby-step mother free-step algorithm, and baby-step free-step algorithm. All algorithms implemented using Maple 11. The Pohlig-Hellman and baby-step giant-step algorithms are efficient enough to be used in discrete logarithm problem over finite field GF(3m ) for m < 20.
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