Judul: Waste Management Strategy as an Attempt to Decrease the Degradation of Aquatic Resources in the Cisadane Watershed, Bogor Regency
Abstrak: Persentase penanganan sampah yang dicapai oleh Kabupaten Bogor tahun 2020 menurut Dinas Lingkungan Hidup (2021) sebesar 22,83% sementara target penanganan sampah tahun 2020 sebesar 75%. Banyaknya sampah di DAS Cisadane menyebabkan banjir, kualitas air menurun, dan bantaran sungai menjadi kotor. Penelitian bertujuan mengidentifikasi prioritas strategi pengelolaan sampah di DAS Cisadane, Kabupaten Bogor. Penelitian dilaksanakan pada bulan November hingga Maret 2021. Pengambilan sampel melalui wawancara dilakukan dengan teknik purposive sampling dan dianalisis dengan metode Analytical Network Process (ANP). Peningkatan jumlah penduduk di Kabupaten Bogor berbanding lurus dengan bertambahnya produksi sampah tiap tahun. Berdasarkan data Dinas Lingkungah Hidup (2021), sampah yang dihasilkan Kabupaten Bogor tahun 2020 yaitu sebesar 3.044,1 ton/hari dengan estimasi produksi sampah perkapita sebesar 0,5 kg/orang/hari. Analisis prioritas strategi pengelolaan sampah di DAS Cisadane dilakukan dengan melihat empat kriteria, yaitu ekologi, ekonomi, kelembagaan, dan sosial. Kriteria yang memiliki tingkat kepentingan paling berpengaruh adalah ekologi dan elemen yang paling berpengaruh adalah jasa lingkungan. Berdasarkan hal tersebut, prioritas alternatif pengelolaan sampah di DAS Cisadane adalah penyediaan sarana dan prasarana sampah yang berfokus pada daerah pemukiman bantaran Sungai Cisadane. Perlu adanya pengawasan, pemantauan, dan evaluasi terkait sarana dan prasarana sampah., The percentage of waste handling of Bogor Regency in 2020 according to the Environmental Office (2021) was 22.83%, with the target being 75%. The increase of waste in the Cisadane watershed causes floods, water quality declines, and polluted rivers. The research objective is to identify priority strategies for waste management in the Cisadane watershed, Bogor Regency. The research was conducted from November to March 2021. Interview samples were taken using a purposive sampling technique and analyzed using the Analytical Network Process (ANP) method. The increase of population in Bogor Regency is directly proportional to the increase in waste produced every year. Based on the Environmental Office (2021) data, the waste products of Bogor Regency in 2020 was 3,044.1 tons/day, with estimated waste production per capita of 0.5 kg/person/day. The analysis for strategies priority of waste management in the Cisadane watershed is based on four criteria. It is ecology, economy, institution, and social. The most important criteria are ecology, and the most influential element is environmental services. According to that statement, the alternative priority of waste management in the Cisadane watershed is the provision of waste facilities and infrastructure that focuses on residential areas along the Cisadane River. Supervising, monitoring, and evaluating the facilities and infrastructure of waste in Bogor Regency is necessary.
Keyword: ANP, Cisadane watershed, environmental services, management, waste

Judul: Community Participation in Household Waste Management Around Cihideung River, Bogor District
Abstrak: Timbunan sampah yang tidak terkendali dapat menimbulkan pencemaran lingkungan salah satunya pendangkalan air sungai akibat air lindi yang berasal dari sampah. Sungai Cihideung merupakan sungai di Kabupaten Bogor yang berstatus tercemar ringan. Hal ini dapat disebabkan oleh aktivitas antropogenik di sekitar sungai dan tingkat pengelolaan sampah yang rendah. Penelitian betujuan untuk mengindetifikasi kondisi umum pengelolaan sampah rumah tangga, menganalisis tingkat partisipasi dan menganalisis hubungan karakteristik masyarakat dengan tingkat partisipasi masyarakat dalam mengelola sampah di sekitar Sungai Cihideung.. Pengumpulan data dilakukan dengan metode kuesioner dan wawancara dengan pemilihan responden secara purposive sampling. Hasil menunjukan bahwa kondisi pengelolaan sampah rumah tangga cukup buruk dengan keterlibatan dalam retribusi rendah. Rata-rata tingkat partisipasi masyarakat dalam pengelolaan sampah rumah tangga tergolong rendah. Terdapat hubungan nyata antara tingkat partisipasi masyarakat dalam mengelola sampah rumah tangga dengan jenis kelamin, tingkat pendidikan, status, profesi, jarak rumah ke sungai, dan lama tinggal. Tingkat partisipasi berkorelasi kuat dengan status., Uncontrolled midden can cause environmental pollution such as river sitling due to leachate from waste. Cihideung River is one of the rivers located in Bogor District classified as “mildly polluted” that may cause by anthropogenic activities and low levels of waste management. The study aims to identify the general condition of household waste management and analyze community participation and the relationship between community characteristics and community participation in managing waste around the Cihideung River. This study was conducted by questionnaire and interview method. Respondents were selected by purposive sampling. The results showed that household waste management is relatively poor with low involvement in retribution. Community participation level is low on average. There is a significant correlation between community participation in managing household waste with gender, education level, status, occupation, distance from house to river, and length of stay. Community participation level is strongly correlated with status.
Keyword: household waste, management, participation

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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