Judul: Estimasi Biaya Eksternal dan Willingness to Accept Masyarakat Akibat Pencemaran di Sekitar Kawasan Pabrik Gula Cepiring, Kendal
Abstrak: The activities of economy, such as production and consumption may reduce the level of environmental quality. An industrial activity is one of the economic activities that has effects not only in economic and social aspect but also influences the physical change of environmental quality. A variety of measures and procedures can be used to improve or maintain environmental quality. Therefore, the study of the estimation of both external cost and people’s willingness to accept (WTA) compensation, the effects toward environment caused by industrial activities is needed for doing further arrangements about environmental charges or taxes to achieve sustainable development. The objective of this study is to identify the society who living in the industry area, to estimate both the external cost and WTA value caused by industrial activities, and to identify the factors that influence WTA value. This paper presents a survey which explores the descriptive analysis, valuation of environmental economics, and application of contingent valuation method (CVM). The observations and interviews were conducted to society who live in sugar industry area, Cepiring-Kendal taken by purposive sampling method. The result shows that the external cost of each household per month is 64.721 IDR, the external cost of society of RW 04 Cepiring is 229.845.336 IDR, while in agricultural sector is 314.720.000 IDR per year. Compared to the external cost of each household, the average of mean values of household’s WTA per month is higher, which is 440.132 IDR. There are five factors that influence WTA value significantly such as education level, houses from industry area, quality of noise, economic losses caused by water pollution, and zero-effort to replace the environmental quality.
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Judul: Estimasi Nilai Kerugian Ekonomi Masyarakat Akibat Pencemaran Di Sekitar Kawasan Industri Baja (Kelurahan Tegal Ratu, Kecamatan Ciwandan, Kota Cilegon).
Abstrak: Industri baja telah berkembang pesat di Indonesia salah satunya di Kelurahan Tegal Ratu. Penelitian ini dilakukan untuk mengidentifikasi eksternalitas positif dan negatif yang dirasakan masyarakat akibat aktivitas industri baja menggunakan metode analisis deskriptif kualitatif, mengestimasi nilai kerugian ekonomi yang ditanggung oleh masyarakat menggunakan metode cost of illness dan loss of earnings, mengestimasi nilai dana kompensasi yang bersedia diterima oleh masyarakat menggunakan Contingent Valuation Method (CVM), dan mengidentifikasi faktor-faktor yang memengaruhi besarnya kesediaan masyarakat dalam menerima dana kompensasi menggunakan analisis regresi linier berganda. Eksternalitas dirasakan oleh responden di RW 01 dan RW 06 Kelurahan Tegal Ratu, Kecamatan Ciwandan. Hasil yang diperoleh yaitu eksternalitas positif yang terjadi yaitu peningkatan lapangan pekerjaan dan peningkatan usaha mikro. Eksternalitas negatif yang terjadi yaitu pencemaran udara dan debu, kebisingan, serta terganggunya kenyamanan. Rata-rata kerugian setiap rumah tangga akibat pencemaran oleh industri baja yaitu sebesar Rp217 767.48/rumah tangga/tahun. Nilai dugaan rata-rata Willingness to Accept (WTA) responden yaitu sebesar Rp515 769.24/rumah tangga/tahun. Faktor-faktor yang berpengaruh nyata pada besarnya nilai WTA responden adalah usia, tingkat pendidikan, jarak tempat tinggal ke industri, dan dummy udara menyesakkan.
Keyword: eksternalitas, industri baja, kerugian ekonomi, pencemaran udara, Willingness to Accept (WTA)

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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