Judul: Factors That Affecting Domestic Waste Supply Chain Management (Case: Puri Permai 1 RW 05 Pete Village, Tigaraksa District, Tangerang Regency)
Abstrak: Meningkatnya jumlah timbulan sampah yang tidak diikuti dengan sistem pengelolaan sampah yang baik akan berdampak buruk dan mengancam kelestarian lingkungan. Pengelolaan sampah tidak terlepas dari faktor internal yang ada di dalam diri masyarakat yaitu pengetahuan, persepsi dan perilaku serta faktor yang ada di luar diri masyarakat yaitu peran pemerintah, tokoh masyarakat, swasta, petugas kebersihan dan ketersediaan sarana prasarana. Tujuan penelitian ini adalah menganalisis pengaruh faktor internal dan eksternal terhadap rantai pasok pengelolaan sampah domestik dari tingkat rumah tangga hingga TPA. Penelitian ini menggunakan metode kuantitatif melalui survei dan didukung data kualitatif melalui observasi, wawancara mendalam dan studi literatur. Responden dalam penelitian ini adalah 65 warga Perum Puri Permai RW 05. Hasil penelitian menunjukkan responden memiliki tingkat pengetahuan yang tinggi, persepsi yang positif dan tingkat perilaku di kategori sedang. Variabel persepsi dan perilaku memberikan pengaruh dalam pengelolaan sampah di tingkat rumah tangga dan komunitas. Pada peran pemerintah, peran tokoh masyarakat berada pada kategori sedang, peran swasta berada di kategori rendah, peran petugas kebersihan di kategori tinggi serta sarana dan prasarana termasuk dalam kategori memadai. Peran pemerintah dan tokoh masyarakat memberikan pengaruh dalam pengelolaan sampah di tingkat rumah tangga dan komunitas., An increase in the amount of waste generation that is not followed by a good waste management system will have a negative impact and threaten environmental sustainability. Waste management is inseparable from internal factors that exist within the community, namely knowledge, perception, and behavior as well as factors that exist outside the community, namely the role of government, community leaders, the private sector, cleaners and the availability of infrastructure. The purpose of this study was to analyze the influence of internal and external factors on the domestic waste management supply chain from the household level to the TPA. This study uses quantitative methods through surveys and is supported by qualitative data through observation, in-depth interviews, and literature studies. The respondents in this study were 65 residents of Perum Puri Permai RW 05. The results showed that the respondents had a high level of knowledge, positive perceptions, and a moderate level of behavior. Perceptual and behavioral variables influence waste management at the household and community levels. In terms of the government's role, the role of community leaders is in the medium category, the role of the private sector is in the low category, the role of cleaning staff is in the high category, and facilities and infrastructure are included in the adequate category. The role of the government and community leaders influences waste management at the household and community levels
Keyword: waste management, domestic waste, internal factors, external factors

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: Penyusunan Overlap Graph menggunakan Suffix Tree pada DNA Sequence
Abstrak: The DNA sequence assembly is very important in genome analysis. This step aims to reconstruct contigous DNA fragment (contigs) from short fragment by concatenating fragments based on the overlap region among them. This method employs overlap graph for solving the problems. In this graph, nodes represent fragments and edges represent overlap. This research developed a software for constructing overlap graph using suffix tree. The evaluation was conducted by measuring the number of nodes, number of edges, and the execution time in many values of minimum overlap. The minimum overlap is defined as the minimum length of substring which is considered as the overlap region between two fragments. The evaluation results showed that the number of nodes, the number of edges, and the execution time were increased with the decreasing of the minimum overlap value.
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