Judul: Social-Ecological System Connectivity of Lobster Fisheries (Panulirus spp.) in Waters of Sukabumi Regency, West Java Province
Abstrak: Lobster merupakan komoditas perikanan unggulan yang terdapat di Kabupaten Sukabumi. Pengelolaan sumberdaya lobster di perairan Kabupaten Sukabumi belum terpetakan dengan baik dalam kerangka sistem sosial-ekologi (SES). Penelitian ini bertujuan memetakan konektivitas antar sistem sosial-ekologi perikanan lobster di Kabupaten Sukabumi dengan komponen Resources Systems (RS), Resources Units (RU), Resources Actors (RA), dan Resources Governance (RG) serta keterkaitannya satu sama lain untuk merumuskan strategi pengelolaannya. Penelitian dilakukan pada bulan Januari 2023 hingga bulan April 2023 di wilayah perairan Kabupaten Sukabumi, Provinsi Jawa Barat. Penelitian ini dilakukan dengan menggunakan pendekatan Social-Ecological System (SES). Hasil penelitian menunjukkan adanya pengaruh dan interaksi yang positif antara Resources Actors (RA) dengan Resources Units (RU) dalam Resources Systems (RS), namun relatif negatif dalam kerangka sistem Resources Governance (RG). Strategi pengelolaan sumberdaya lobster dapat dilakukan melalui kolaborasi yang baik antara pemerintah dan pengguna sumberdaya untuk menjaga kelimpahan sumberdaya lobster., Lobster is a leading fishery commodity in Sukabumi Regency. Management of lobster resources in the waters of Sukabumi Regency must be adequately mapped within the social-ecological system (SES) framework. This study aims to map the connectivity between and within components of the social-ecological system of lobster fisheries in Sukabumi Regency with the components of Resources Systems (RS), Resources Units (RU), Resources Actors (RA), and Resources Governance (RG) and their interrelationships with one another to formulate a management strategy. The research was conducted from January 2023 to April 2023 in the territorial waters of Sukabumi Regency, West Java Province. This research was conducted using the Social-Ecological System (SES) approach. The results of the study show that there is a positive influence and interaction between Resources Actors (RA) and Resources Units (RU) in Resources Systems (RS) but relatively negative in the framework of the Resources Governance (RG) system. Lobster resource management strategies can be carried out through good collaboration between the government and resource users to maintain the abundance of lobster resources.
Keyword: connectivity, lobster, management, social-ecological system

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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