Judul: Peranan Pengetahuan Lokal terhadap Keberlanjutan Pengelolaan Sumber Daya Ikan Sungai (Kasus: Lubuk Larangan di Nagari Barung-Barung Balantai Tengah, Kecamatan Koto XI Tarusan, Kabupaten Pesisir Selatan, Provinsi Sumatra Barat
Abstrak: Manusia sangat bergantung pada sumber daya alam termasuk perairan daratan seperti sungai sebagai penunjang kehidupan. Pemanfaatan yang berlebihan terhadap sumber daya sungai menimbulkan ketidakseimbangan ekosistem mulai dari penurunan populasi ikan hingga pencemaran air. Lubuk Larangan merupakan salah satu bentuk pengetahuan lokal yang digunakan untuk menjaga dan melestarikan sumber daya ikan sungai. Penelitian ini bertujuan untuk menganalisis unsur-unsur pengetahuan lokal dan kesesuaian normatifnya yang tergambarkan dalam mekanisme transfer pengetahuan pada masyarakat di sekitar Lubuk Larangan, menganalisis mekanisme transfer pengetahuan yang digunakan untuk mendukung praktik pengelolaan Lubuk Larangan secara nyata, dan menganalisis tingkat keberlanjutan pengelolaan sumber daya ikan sungai di Lubuk Larangan melalui pendekatan kuantitatif yang didukung oleh data kualitatif. Teknik analisis data menggunakan uji regresi dan metode survei. Hasil penelitian menunjukkan bahwa unsur-unsur pengetahuan lokal berpengaruh terhadap mekanisme transfer pengetahuan. Sementara itu, terdapat pengaruh antara mekanisme transfer pengetahuan terhadap praktik pengelolaan Lubuk Larangan secara nyata., Humans rely heavily on natural resources including inland waters such as rivers as a support for life. Excessive utilization of river resources creates ecosystem imbalances ranging from declining fish populations to water pollution. Lubuk Larangan is one form of local knowledge used to maintain and preserve river fish resources. This research aims to analyze the elements of local knowledge and normative conformity depicted in the process of knowledge transfer mechanism in the community around Lubuk Larangan, analyze knowledge transfer mechanisms used to support Lubuk Larangan management practices in real terms, and analyze the sustainability level of river fish resource management in Lubuk Larangan through quantitative approaches supported by qualitative data. Data analysis techniques use regression tests and survey methods. The results showed that elements of local knowledge influence the process of knowledge transfer mechanism. Meanwhile, there is an influence between the knowledge transfer mechanism on the management practices of Lubuk Larangan in real terms.
Keyword: knowledge transfer mechanism, management practices, sustainability

Judul: Analisis Peran Kelembagaan Ekonomi Lokal terhadap Pemanfaatan Perairan dalam Pengelolaan Ikan Larangan (Studi Kasus Ikan Larangan Desa Sungai Pasak Kota Pariaman)
Abstrak: This research based on management of fisheries resources by community Desa Sungai Pasak in West Sumatera. Management of fisheries resources is known as ikan larangan. Ikan larangan is a kind of fisheries management system that applies closing seasons to fishing in a portion of river or canal for a certain period. The purpose of this study was to indentify management of fisheries institutional, transaction cost, and describe the benefit from management of ikan larangan Desa Sungai Pasak. The research method are purposive sampling and snowball sampling. Another method of supporting the result interview are observations and documentation. The result of research showed that Ikan larangan areas is under the management of community from village government and local comunity representative. Management cost for ikan larangan include operational cost (IDR 12 000 000) and transaction cost (IDR 8 000 000 anually). Field observation shows that the management of the ikan larangan areas has a positive impact on the villagers. Some of the benefits from the system are fisheries resources in the open waters are kept sustainable, facilitating brotherhood among the villagers, and generating income for villagers
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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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