Judul: Estimasi Nilai Kerugian Ekonomi akibat Pencemaran Air di Waduk Cirata, Wilayah Kabupaten Cianjur, Provinsi Jawa Barat
Abstrak: Cirata Reservoir is one of cascade reservoir which was built by dammed Citarum River’s flow for some purposes, such as hydropower plant, fisheries, and floating cage aquaculture. Cirata Its water quality is declining due to water pollution. This pollution causes economic losses for the users of Cirata Reservoir, those are: floating cage aquaculture farmers, fishermen, and PT. PJB UP Cirata as the management of Cirata hydropower plant. This research aims to identify the respondents’ perceptions about the water pollution use descriptive analysis and to estimate the economic losses which are caused by water pollution in Cirata Reservoir Cianjur Regency in 2013 use economic loss approach and benefit transfer method. Commonly, the respondents understand about the water pollution in reservoir and suffered by it. Based on data analysis obtained that economic loss estimation of floating cage aquaculture is IDR 427,581,110,250.00 (the biggest loss), economic loss estimation of fisheries is IDR 1,176,696,421.00, and economic loss estimation of hydropower plant is IDR 198,418,167,672.67. Therefore, total economic loss estimation due to water pollution in Cirata Reservoir Cianjur Regency in 2013 is IDR 628,175,974,343.67.
Keyword: water pollution., resource damage assessment, economic loss, Cirata Reservoir

Judul: Kerugian Ekonomi PLTA Akibat Sedimentasi dan Peran Kelembagaan Dalam Pengelolaan Waduk Cirata - Jawa Barat
Abstrak: Cirata dam, a man made resource, included in the The Common Pool Resources (CPRs). Trend of CPRs are over use and produce externality. The impact of these externalities are the mass death of fish in pondfish, corrosive plant equipment, decreased production of hydroelectric power and the most important suistainability of dam. At least 3 sectors inside activity which contribute these sedimentation: fisheries, agriculture, and domestic activities. The objective of this study are to estimate which pollutant’s source that contribute to sedimentation by estimating the solid and liquid waste; estimating economic losses of hydropower and analyze appropriate institutional model as the CPRs dam management. Data analysis for estimating economic losses using benefit-cost analysis and for institutional analysis using Dolsak&Ostrom approach. The results showed that the main source of pollution comes from fisheries sector. The contribution from solid waste 742 ton/day and from domestic ativities 58 ton/day. The willingness to pay community for waste management program is Rp25.000/month for fisheries family and Rp6.175,00/month for non-fisheries family. Hydropower losses is Rp11 million comes from 8 years remain life time reservoir. Cost of enviromental improvement is Rp65 million. Institutional analysis showed that management of dam are low enforcement, high demand of dam product, no leading sector for collective action, and there is the political interest. The study emphazed the importance of institutional arrangement for dam suistainability management.
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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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