Judul: Dampak Keberadaan Industri Peleburan Besi dan Baja terhadap Lingkungan dan Kesehatan Masyarakat di Dusun Palahlar, Kecamatan Cikupa, Kabupaten Tangerang
Abstrak: Iron and steel smelting industry in Tangerang causes air pollution which can have a negative impact on the environment and the health of surrounding communities. Therefore, the purposes of the study were to: (1) identify the impact of pollution on the environment, (2) determine the impact of pollution on public health, (3) determine the impact of pollution on the proper value of compensation received by the community, (4) analyze the factors that affect the amount of compensation, and (5) analyze the factors that affect the decision to move. Analysis used were descriptive, cost of illness, Willingness to Accept (WTA) and regression model and estimated using Ordinary Least Squares (OLS) and Maximum Likelihood Estimator (MLE) methods. The results show that households with residential distance the closer from the industrial environment feel the worse after the existence of the industry, have the higher total medical incurred expenses and get the highest average value of household WTA. Estimation value of household WTA in the Hamlet Palahlar is influenced by education level, length of stay, distance of residence from the industry, young age, and middle age. Household's decision to move is influenced by the level of education, income, length of stay, and distance of residence from the industry.
Keyword: willingness to accept., health, environment, iron and steel smelting industry

Judul: Persepsi, Preferensi, dan Willingness To Pay Masyarakat Terhadap Lingkungan Pemukiman Sekitar Kawasan Industri (Kasus Kawasan Industri di Kelurahan Utama, Cimahi, Jawa Barat)
Abstrak: The industrial development at Kelurahan Utama created new job fields. But in the other hand, industrial development might cause disruption on environment quality. The derivation of environment quality will cause the people that reside around industrial area have perception and preference of its own from the presence of this area. This research also work trough estimated expense that the people willing to pay to increase the environment quality using Contingen Valuation Method. Therefore from those description, the purpose of this research are: (1) to analyze factors related to people’s perception concerning the environment quality at Kelurahan Utama; (2) to analyze factors related to people’s preference concerning habitation/residence around industrial area at Kelurahan utama; (3) to examine the Willingness to Pay people at Kelurahan utama so that their environment increased; (4) to arrange alternate policy so that the environment around industrial area at Kelurahan Utama increased. This research started since May to Agust 2009. The data that has been used are primary data and secondary data. The primary data conducted with giving questioner to the head family around industrial area at Kelurahan utama. With sample method Purposive Sampling to 100 people using Slovin Formula. The secondary data conducted from relevant sources. To knowing factors that related with people’s preference of recidency, perception of environment and willingness to pay using analysis Chi-Square and Rank Spearman, whereas to predict WTP value using analysis double linier regression. All the analysis are supported by processor data program SPSS version 16.0 for windows with 15 percent real degree. From Chi-Square test, acquired result as follow: (1) factors that related to respondent perception of environment around the industrial area are the distance between the residence to the industrial area, crowded condition, noisy condition, and air quality; (2) factors that related with respondent preference to residence are expenses, residence status, distance of the residence to industrial area, water facility, crowded condition, noisy condition, cleanness of residence, distance of the residence to the market, distance of the residence to public transport, and criminal level; (3) factors that related to respondent’s willingness to pay are income, distance between the residence to the industrial area, water facility, noisy condition, air quality, crowded condition, criminal level, respondent preference of residency, and respondent perception of environment around industrial area. Estimated flat value WTP respondent are Rp.9400,00/HF/month, and total value people’s WTP are Rp.65.771.800,00/month. Factor that affected to WTP respondent are education, income, expenses, distance to industrial area, noisy condition, crowded condition, distance of residency to work place, and perception of environment around industrial area. Alternative policies to cope with air pollution are regulation, quota, taxes, and tariff of pollution along with property right. Whereas to cope with noise by getting house planting or extending divider wall between the residency and industrial area. And what is more noisy problem and the damage of public road could be overcome by special road for industry. This is supported by people’s WTP about environment. Keywords: industrial area, sustainable environment, willingness to pay
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Judul: Konstruksi aritmetika kurva eliptik F(2m) supersingular dan non-supersingular untuk skema kunci publik ElGamal
Abstrak: Algoritme ElGamal adalah salah satu algoritme kunci publik dengan aritmetik modular p yang mempunyai struktur grip siklik Z(p). Tingkat keanaman algoritme ini terletak pada pemecahan masalah logaritme diskret dari Z(p). Akan tetapi, tingkat keamanan tadi tahun ke tahun semakin menurun yang disebabkan kemampuan pemecahan algoritme diskret semakin meningkat. Untuk memenuhi tingkat keamanan yang memadai dibutuhkan p yang cukup besar yang menyebabkan proses enkripsi dan dekripsi menjadi lambat.
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