Judul: Impact Analysis and Optimization Strategy of Waste Management of TPST Babakan Sari, Bandung City
Abstrak: Kota Bandung adalah kota besar ke empat di Indonesia yang juga tidak terlepas dari masalah krusial terkait timbulan sampah. Saat ini, Tempat Pembuangan Akhir (TPA) Kota Bandung sudah mengalami kelebihan kapasitas timbulan sampah yang dapat ditampung. Pemerintah berupaya mengatasinya dengan menggalakkan prinsip Reduce, Reuse, Recycle (3R) dan pembentukkan Tempat Pengolahan Sampah Terpadu (TPST). Pembentukkan TPS Terpadu dapat membantu meminimalkan sampah dari sumbernya. TPS Terpadu Babakan Sari merupakan salah satu TPS percontohan tetapi masih belum optimal dalam implementasinya. Penelitian ini memiliki tujuan untuk menganalisis persepsi dan keterlibatan masyarakat terkait keberadaan TPST Babakan Sari; mengidentifikasi dampak yang dirasakan masyarakat dengan keberadaan TPST Babakan Sari; dan merumuskan strategi optimalisasi pengelolaan TPST. Metode dalam penelitian ini adalah analisis deskriptif kualitatif dan kuantitatif, analisis biaya angkut dan retribusi, dan Analythical Hierarchy Process (AHP). Hasil penelitian menunjukkan bahwa persepsi masyarakat terhadap keberadaan TPST baik namun keterlibatan masyarakat masih perlu ditingkatkan, Keberadaan TPST memiliki dampak yang belum optimal terhadap aspek sosial dan lingkungan berupa pengurangan beban sampah organik ke TPA sebesar 9,7%, dampak ekonomi berupa penghematan biaya angkut sebesar 4,4% dan retribusi masyarakat sebesar 4,4%, strategi optimalisasi pengelolaan sampah TPST Babakan Sari yang dapat dilakukan yaitu pada kriteria pelaksanaan 0,496 dengan prioritas alternatif kebijakan meningkatkan pemahaman pengelolaan sampah 0,279., Bandung City is the fourth-largest city in Indonesia has also facing a crucial problem of solid waste generation. The Bandung City landfills (TPA) is already experiencing excess capacity. Nowadays, the government is trying to overcome the problem by promoting the (Reduce, Reuse, Recycle) 3R principles and the establishment of Temporary Integrated Waste Processing Site (TPST). The establishment of TPST can help minimize waste from its source. The Babakan Sari Integrated TPS is one of the pilot TPS but its implementation is still not optimal. This study aims to analyze the perception and involvement of the community regarding the existence of the Babakan Sari TPST, to identify the impact of the TPST, and to formulate a strategy for optimizing the management of the TPST. The methods used are descriptive qualitative and quantitative analysis, cost analysis of transportation costs and waste retribution, and Analytical Hierarchy Process (AHP). The results showed that the community's perception of the existence of the TPST was good but community involvement still needed to be improved. The existence of the TPST has impact but not optimal, on the social and environment in the form of reducing the organic waste load to the landfills by 9.7%, the economic impact in the form of saving transportation costs by 4,4% and community retribution. by 4,4%, the optimization strategy for waste management at the Babakan Sari TPST that can be done is on the implementation criteria 0,496 with alternative policy priorities to increase understanding of waste management 0,279.
Keyword: Analythical Hierarchy Process, community perception, polluters pays principle, waste generation

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: 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.
Keyword: