Judul: Public Perception Analysis and Willingness To Pay (WTP) Estimation on TPS 3R as Alternative of Waste Management System (Case Study: Kelurahan Pondok Karya, Kecamatan Pondok Aren, South Tangerang City)
Abstrak: Keterbatasan lahan Tempat Pemrosesan Akhir (TPA) Cipeucang untuk menampung timbulan sampah akan berimplikasi pada timbulnya Tempat Penampungan Sementara (TPS) secara liar di Kota Tangerang Selatan. TPS liar menggunakan sistem konvensional yang akan menimbulkan dampak negatif pada lingkungan pemukiman, salah satunya di Kelurahan Pondok Karya. Paradigma sistem konvensional harus ditinggalkan dan diperbaharui dengan pola pendekatan berbasis masyarakat seperti TPS 3R (reduce, reuse, recycle). Tujuan penelitian ini adalah: (1) mengidentifikasi upaya pemerintah terhadap rencana penyelenggaraan TPS 3R, (2) mengidentifikasi persepsi masyarakat terhadap pengelolaan sampah saat ini dan tingkat partisipasi terhadap rencana penyelenggaraan TPS 3R, (3) mengestimasi nilai Willingness to Pay (WTP) masyarakat, dan (4) menganalisis faktor-faktor yang mempengaruhi besarnya nilai WTP masyarakat. Penelitian ini menggunakan metode analis deskriptif, analisis skala likert, Contingent Valuation Methode (CVM), dan analisis regresi logistik ordinal. Hasil penelitian menunjukan adanya upaya pemerintah berupa peningkatan kegiatan sosialisasi serta pemberian bantuan dana pada pembangunan TPS 3R. Masyarakat sangat setuju bahwa pengelolaan sampah saat ini tidak layak baik dari aspek sosial, lingkungan, maupun ekonomi. Tingkat partisipasi masyarakat sangat tinggi untuk mendapat pengelolaan sampah yang lebih baik. Rataan nilai WTP sebesar Rp 40.100/KK/bulan akan digunakan untuk pembiayaan operasional TPS 3R. Faktor yang mempengaruhi besaran nilai WTP adalah lama tinggal, tingkat pendapatan, status tempat tinggal, dan pendidikan., The problem of limited capacity of Cipeucang landfill (TPA) to accommodate the urban waste cause the emergence of illegal temporary landfill (TPS) in South Tangerang. The illegal TPS is using the conventional waste management system which creates negative effects for the surrounding residential areas, including Kelurahan Pondok Karya. The conventional waste management system must be replaced with the new community-based approach , such as TPS 3R (reduce, reuse, recycle). The aims of this study are; (1) identifying the government plan to execute TPS 3R; (2) identifying people’s perception regarding to the current waste management and people’s participation level to TPS 3R execution plan; (3) estimating people’s Willingness to pay, and; (4) analyzing the factors that influence people’s WTP. This study used a descriptive analytical method, likert scale, Contingent Valuation Method (CVM), and ordinal logistic regression. The result of this study shows that government has conducted socialization on TPS 3R and provide budget for TPS 3R establishements. People strongly agree that the current waste management is not feasible in social, environmental and economic aspects. People's level of participation to get a better waste management was high. Mean of WTP value was Rp 40.100,00/household/month and would be used to finance the TPS 3R operational costs. Factors that influenced the WTP are period of stay, level of income, residence status, and level of education.
Keyword: biaya operasional, persepsi masyarakat, regresi logistik ordinal, TPS liar

Judul: Estimated Value of Community’s Willingness to Pay to Contribute to TPS 3R Based Waste Management in Sidoarjo Regency
Abstrak: Peningkatan jumlah sampah berlebih (overload) di TPA Jabon Kabupaten Sidoarjo terjadi akibat jumlah timbulan sampah yang dihasilkan melebihi kapasitas TPA serta tingkat pelayanan dalam pengelolaan sampah lebih rendah dari keseluruhan timbulan sampah sehingga perlu dilakukan upaya penanganan dan pengurangan sampah yang dimulai dari sumbernya yaitu di tingkat rumah tangga. Pemerintah melalui Direktur Jendral Cipta Karya KPUPR menerapkan kebijakan program pengurangan sampah dari sumbernya melalui pengadaan TPS 3R. Berdasarkan hal tersebut, penelitian ini bertujuan untuk (1) menganalisis persepsi masyarakat serta pengelola terhadap pengelolaan sampah dan preferensi pengembangan TPS 3R di TPS Desa Ngampelsari Kabupaten Sidoarjo, (2) menganalisis faktor-faktor yang memengaruhi preferensi masyarakat dalam pemilahan sampah di tingkat rumah tangga, (3) mengestimasi nilai kesediaan (willingness to pay) masyarakat untuk berkontribusi dalam kegiatan operasional TPS 3R dan faktor-faktor yang memengaruhinya. Metode analisis yang digunakan dalam penelitian ini yaitu skala likert, Contingent Valuation Method (CVM), regresi logistik biner, dan regresi berganda. Hasil penelitian menunjukkan bahwa persepsi masyarakat serta pengelola terhadap pengelolaan sampah saat ini pada aspek sosial, lingkungan ekonomi masuk ke kategori penilaian setuju, dan pada aspek preferensi pengembangan TPS 3R masuk kategori penilaian sangat setuju. Faktor-faktor yang memengaruhi preferensi masyarakat dalam pemilahan sampah di tingkat rumah tangga secara signifikan ialah lamanya pendidikan, jumlah tanggungan keluarga, total pendapatan, pekerjaan istri, dan luas rumah. Nilai WTP yang digunakan sebesar Rp13.000 per KK per bulan untuk kebutuhan biaya operasional TPS 3R. Faktor-faktor yang memengaruhi secara signifikan terhadap kesediaan membayar masyarakat adalah variabel kesediaan memilah sampah, frekuensi memilah sampah (pernah memilah, selalu memilah), dan total pendapatan., The increase in the amount of excess waste (overload) in the TPA Jabon, Sidoarjo Regency occurs due to the amount of waste generated exceeding the capacity of the TPA and the level of service in waste management is lower than the overall waste generation, so it is necessary to make efforts to handle and reduce waste starting from its source, namely at the household level. The government through the Director General of Cipta Karya KPUPR introduced a policy of reducing waste at the source through the procurement of TPS 3R. Based on that, this study aims to (1) analyze the perception of the community and managers on waste management and preferences for the development of TPS 3R at TPS Ngampelsari Village, Sidoarjo Regency, (2) analyze the factors that influence the preference of the community in sorting waste at the household level, (3) estimating the value of the community willingness to pay to contribute to the operational activities of the TPS 3R and the factors that influence it. The analytical methods used in this research are likert scale, Contingent Valuation Method (CVM), binary logistic regression, and multiple regression. The results of the study indicate that the current perception of the community and management of waste management on the social, economic, and environmental aspects is in the category of agreeing assessment, and on the preference aspect, the development of TPS 3R is categorized as strongly agreed. The factors that significantly influence the preference of the community in sorting waste at the household level are the length of education, the number of dependents in the family,
Keyword: binary logistic regression, contingent valuation method, likert scale, operating cost

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.
Keyword: