Judul: Production Model and Behavior Trends of Disposing Domestic Plastic Waste to the River, Community of Kampungsawah Village, Cisadane Watershed
Abstrak: Sungai merupakan sumber air yang vital bagi kehidupan manusia. Saat ini, sungai tercemar oleh sampah domestik yang bersumber dari sampah pemukiman bantaran sungai. Masyarakat sebagai produsen sampah plastik domestik bersifat dinamis, sehingga perlu diketahui faktor yang menjadi latar belakang produksi dan kecenderungan perilaku masyarakat membuang sampah plastik ke sungai. Penelitian ini bertujuan untuk memodelkan faktor-faktor yang melatarbelakangi produksi dan kecenderungan perilaku membuang sampah plastik domestik masyarakat Desa Kampungsawah. Variabel independen terdiri dari pendidikan, jumlah anggota keluarga, pengetahuan, sikap, kebiasaan dan kesadaran, ketersediaan fasilitas, dan jarak rumah ke sungai. Data dianalisis dengan regresi linier berganda dan regresi logistik biner. Produksi sampah plastik rumah tangga masyarakat dipengaruhi oleh jumlah anggota keluarga, tingkat pengetahuan, sikap, serta kebiasaan dan kesadaran. Kecenderungan perilaku masyarakat membuang sampah ke sungai dipengaruhi oleh jarak rumah responden ke sungai., Rivers are a vital source of water for human life. Currently, rivers are polluted by plastic waste sourced from residential waste along the river. The community as a producer of domestic plastic waste is dynamic, so necessary to know the factors behind the community production and behavioral tendencies to throw plastic waste into the river. This study aims to model the factors behind the production and behavioral tendencies of disposing of domestic plastic waste in the community of Kampungsawah Village. The independent variables were education level, number of family members, level of knowledge, attitudes, habits and awareness, facilities, and the distance from respondent’s house to the river. Data were analyzed using multiple linear regression and binary logistic regression. The production of domestic plastic waste was influenced by the number of family members, level of knowledge, attitudes, habits and awareness. The tendency of people's behavior to throw garbage into the river is influenced by the distance of the respondent’s house to the river.
Keyword: community behavior, domestic, modeling, plastic, regression

Judul: Produksi dan Perilaku Membuang Sampah Rumah Tangga ke Sungai di Desa Sundawenang, Sub-DAS Cicatih, Sukabumi, Jawa Barat
Abstrak: Pembuangan sampah ke sungai dilakukan oleh rumah tangga yang bermukim di sekitar sungai. Aktivitas tersebut menyebabkan pencemaran sampah di sungai, meningkatnya kelimpahan mikroplastik di perairan, dan dapat berdampak terakumulasi mikroplastik di dalam tubuh biota. Penelitian ini bertujuan untuk menganalisis faktor yang mempengaruhi perilaku rumah tangga membuang sampah ke sungai dan memproduksi sampah plastik. Wawancara dilakukan terhadap rumah tangga di Desa Sundawenang, Kecamatan Parungkuda, Kabupaten Sukabumi, Jawa Barat. Penelitian ini menggunakan analisis regresi linear berganda untuk melihat faktor yang bepengaruh pada produksi sampah plastik dan logistik biner untuk menganalisis faktor perilaku membuang sampah rumah tangga. Berdasarkan hasil penelitian faktor fasilitas, kesadaran, dan pendapatan berpengaruh terhadap produksi sampah plastik. Sementara, jarak rumah, pengetahuan, dan kesadaran berpengaruh terhadap perilaku membuang sampah ke sungai. Sehingga diperlukan upaya penyediaan fasilitas pengelolaan sampah, peningkatan kesadaran pengelolaan sampah, peningkatan sikap rumah tangga dalam mengelola sampah, dan penegakkan peraturan mengenai larangan membuang sampah ke sungai., Waste disposal into the river is commonly practiced by households around the river. These activities lead to increase of river pollutions, rise the abundance of microplastics in waters, and intensify the microplastics accumulation in the body of aquatic biota. This study aims to analyze the household plastic waste production and behavior of throwing garbage into the river. Interviews were conducted with households in the Sundawenang Village, Parungkuda District, Sukabumi Regency, West Java. The research used multiple linear regression for assessing factors affecting plastics waste production and binary logistic for analyzing factors affecting households’ behavior in discarding plastic waste into the river stream. The research results that waste management facilities, awareness, and income are significantly affecting household’s plastic waste production. Meanwhile, the house distance to the river, knowledge, and awareness are significant factors of household’s waste throwing to the river. Therefore, it is important to improve waste management facilities, increase awareness and knowledge on plastic waste management, and enforcement of regulation on plastic waste control and management.
Keyword: Pencemaran sungai, Perilaku rumah tangga, Produksi sampah plastik, Regresi logistik biner, River pollution, Binary logistic regression, Household behavior, Plastic waste production

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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