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: Eksplorasi Dinamika Keterkaitan Social-Ecological System Perikanan Lobster di Pesisir Kabupaten Pangandaran, Provinsi Jawa Barat
Abstrak: Lobster merupakan komoditas ekonomis penting yang potensial di pesisir Pangandaran. Pengelolaan sumberdaya lobster dalam kerangka Social-Ecological System (SES) di pesisir Pangandaran belum teridentifikasi dengan baik. Penelitian ini bertujuan untuk memetakan dan menganalisis dinamika keterkaitan Social-Ecological System (SES) perikanan lobster (Panulirus spp.) dengan komponen-komponen berupa resources systems (RS), resources units (RU), resources actors (RA), dan resources governance (RG) sebagai input untuk merumuskan strategi pengelolaan perikanan lobster yang berkelanjutan di pesisir Pangandaran. Pengambilan data dilakukan pada bulan Mei hingga Juni 2023 di Kecamatan Cimerak, Kabupaten Pangandaran. Interaksi keterkaitan yang kuat terjadi pada hubungan antar komponen RA dan RS dimana perubahan interaksi dari keduanya dapat mengakibatkan adanya perubahan pada komponen lainnya., Lobster is a potentially important economic fisheries commodity on the coast of Pangandaran. Lobster fisheries management using the Social-Ecological System (SES) framework on the Pangandaran coast has not been well identified. This research aims to map and analyze the dynamics irrelationship between the Social-Ecological System (SES) of lobster (Panulirus spp.) fisheries with the components of resource systems (RS), resource units (RU), resource actors (RA), and resource governance ( RG) as input for developing a sustainable lobster fisheries management strategy on the Pangandaran coast. Data was collected from May to June 2023 in Cimerak District, Pangandaran Regency. Strong interrelated interactions occur in the relationship between RA and RS components where changes in the interaction of the two can result in changes in the other components.
Keyword: Connectivity, Lobster fisheries, Pangandaran coast, 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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