Judul: Small-Scale Fisheries Management using a Social-Ecological System Approach on Panggang Island, Seribu Islands Administrative Regency, DKI Jakarta Province
Abstrak: Perikanan skala kecil di Pulau Panggang masih belum berjalan sesuai dengan peraturan yang ada. Nelayan Pulau Panggang masih menggunakan alat tangkap yang dilarang sehingga berpotensi merusak ekosistem dan menyebabkan konflik antar nelayan. Kompleksitas permasalahan perikanan di Pulau Panggang melibatkan komponen sosial dan ekologi. SocialEcological System adalah kerangka konsep sistem ekologi dan sistem sosial sebagai satu kesatuan sistem yang tidak terpisahkan Penelitian ini bertujuan untuk memetakan komponen dan konektivitas SES sebagai dasar strategi pengelolaan perikanan skala kecil Pulau Panggang. Penelitian dilaksanakan di Pulau Panggang, Kepulauan Seribu, DKI Jakarta selama Bulan November 2023. Teknik sampling yang digunakan yaitu metode purposive sampling. Jumlah responden dalam penelitian ini sebanyak 30 responden nelayan dan 2 responden pengepul. Hasil penelitian menunjukkan bahwa terjadi hubungan yang kuat antar komponen SES. Konektivitas RA dan RU memiliki interaksi yang paling kuat dalam jejaring konektivitas SES. Implementasi peraturan oleh RG masih lemah dan berpengaruh dalam tata kelola sumber daya. Strategi pengelolaan perikanan skala kecil di Pulau Panggang yang dapat dilakukan yaitu meningkatkan kolaborasi antara RG dan RA dalam mewujudkan keberlanjutan sumberdaya ikan di Perairan Pulau Panggang., Small-scale fisheries on Panggang Island are still not running in accordance with existing regulations. Panggang Island fishermen still use prohibited fishing gear, potentially damaging the ecosystem and causing conflicts between fishermen. The complexity of fisheries problems on Panggang Island involves social and ecological components. Social-Ecological System is a conceptual framework of ecological systems and social systems as an inseparable system. This study aims to map the components and connectivity of SES as the basis for Panggang Island's small-scale fisheries management strategy. The research was conducted on Panggang Island, Seribu Islands, DKI Jakarta during November 2023. The sampling technique used was purposive sampling method with descriptive analysis technique. The number of respondents in this study were 30 fishermen respondents and 2 collector respondents. The results showed that there was a strong relationship between SES components. RA and RU connectivity have the strongest interaction in the SES connectivity network. The implementation of regulations by RG is still weak and influential in resource governance. The strategy for managing small-scale fisheries in Panggang Island is to increase collaboration between RG and RA in realizing the sustainability of fish resources in Panggang Island Waters.
Keyword: pulau panggang, Perikanan, SES, Skala Kecil, Fisheries, Panggang Island, SES, Small-Scale

Judul: Keterkaitan Social-Ecological System (SES) sebagai Faktor Input  bagi Pengelolaan Perikanan di Kawasan Mangrove Pandansari, Brebes, Jawa Tengah
Abstrak: Ekosistem mangrove berpotensi untuk menghasilkan berbagai produk yang memiliki nilai ekonomi tinggi. Pengelolaan sumberdaya perikanan mangrove Pandansari belum sepenuhnya terintegrasi dengan baik dalam kerangka sistem sosial-ekologi. Penelitian ini bertujuan untuk menganalisis dan memetakan komponen sistem sosial-ekologi guna merumuskan strategi pengelolaan perikanan di ekosistem mangrove Pandansari. Penelitian dilaksanakan pada bulan Oktober hingga November 2023. Hasil analisis menunjukkan adanya keterkaitan yang erat antara komponen-komponen dalam sistem sosial-ekologi. Pengguna sumberdaya (RA) memiliki jumlah interaksi yang sangat kuat dibandingkan komponen SES perikanan mangrove lainnya, namun penerapan sistem tata kelola di perairan mangrove Pandansari masih lemah. Strategi pengelolaan sumberdaya perikanan mangrove dapat dilakukan dengan menjalin kerjasama yang baik antara pemerintah (RG) dengan pengguna sumberdaya (RA) untuk menghasilkan pengelolaan sumberdaya perikanan (RU) di perairan mangrove Pandansari yang berkelanjutan., Mangrove ecosystems have the potential to produce various products that have high economic value. The management of Pandansari mangrove fisheries resources has not been fully integrated within the framework of the social-ecological system. This study aims to analyze and map the components of the social-ecological system to formulate fisheries management strategies in the Pandansari mangrove ecosystem. The research was conducted from October to November 2023. The results of the analysis showed a close relationship between the components of the social-ecological system. Resource users (RA) have a very strong number of interactions compared to other mangrove fisheries SES components, but the implementation of the governance system in Pandansari mangrove waters is still weak. Mangrove fisheries resource management strategies can be done by establishing good cooperation between the government (RG) and resource users (RA) to produce sustainable management of fisheries resources (RU) in Pandansari mangrove waters
Keyword: Mangrove Fisheries, Pandansari Mangrove, Resources, Social-Ecological System

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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