Judul: Fishery management model on overfished rgion : case study Southern Sulawesi waters
Abstrak: Meskipun secara agregat (nasional) potensi sumberdaya ikan belum dimanfaatkan optimal namun di beberapa kawasan perairan telah mengalami kondisi padat tangkap (overfishing) yang mengancam keberlanjutan sumberdaya perikanan dan keberlanjutan ekonomi (economic sustainability) masyarakat nelayan. Penelitian ini bertujuan menyusun model pengelolaan perikanan di wilayah padat tangkap, mencakup pengkajian parameter bioekonomi, karakteristik dan manfaat sosial ekonomi penangkapan ikan, serta simulasi model pengelolaan. Lokasi penelitian di perairan Sulawesi Selatan bagian Selatan yang merupakan bagian administratif wilayah Kabupaten/Kota : Makassar, Takalar, Bantaeng, Sinjai, Bulukumba, Jeneponto, dan Selayar. Metode yang digunakan adalah pemodelan yang dikombinasikan dengan SWOT dan AHP untuk menentukan prioritas kebijakan yang ditempuh. Analisis ekonomi usaha penangkapan menunjukkan bahwa biaya dan pendapatan nelayan berbeda antar jenis alat tangkap yang digunakan. Alat tangkap sero dan pukat cincin masing-masing memberikan nilai pendapatan terendah dan tertinggi bagi nelayan di Sulawesi Selatan bagian Selatan. Melalui berbagai skenario kebijakan menunjukkan bahwa keuntungan nelayan akan meningkat jika harga ikan naik. Sebaliknya, keuntungan berkurang jika harga BBM, bunga bank, dan upah ABK mengalami kenaikan. Model SUR dimodifikasi dari persamaan Tai and Heaps (1996) dimana perubahan upaya penangkapan sebanding dengan perkalian suatu parameter responsif dengan keuntungan per upaya penangkapan. Analisis pemodelan SUR dilakukan terhadap 13 alat tangkap dengan 8 skenario (meliputi BBM, harga ikan, bunga bank, upah) selama 1979 – 2003. Analisis model menunjukkan bahwa skenario kebijakan menyebabkan jenis alat tertentu jumlahnya tetap, berkurang atau bertambah. Pada umumnya dengan pemberlakuan setiap skenario, jenis alat tangkap yang berespon tidak menunjukkan perbedaan. Payang dan pukat cincin jumlahnya berkurang pada setiap skenario yang diberlakukan. Pukat pantai, jaring insang hanyut, bagan perahu, bagan tancap, rawai tetap, dan bubu adalah alat tangkap yang jumlahnya selalu dapat bertambah. Analisis prioritas kebijakan pengembangan perikanan untuk Sulawesi Selatan terarah pada perikanan tangkap sebagai prioritas pertama, disusul oleh budidaya perikanan, pengolahan perikanan, dan non-perikanan berturut-turut sebagai prioritas kedua, prioritas ketiga, dan prioritas keempat (terakhir).
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Judul: Model Pengelolaan Perikanan Tangkap Berkelanjutan di Sulawesi Selatan
Abstrak: Research on sustainable fishing management in South Sulawesi was carried out in three regencies, namely Pangkep Regency, Takalar Regency and Bulukumba Regency. The aim of the research was 1) to analyze fishing resource used; 2) to determine the index value and the status of sustainable fishing; 3) to formulate the model for managing sustainable fishing; and 4) to formulated policy for managing sustainable fishing in South Sulawesi. The research was carried out from February to October 2011. The types of data used were primary as well as secondary data. The data were analyzed using the Rapfish method and the Multi Dimensional Scaling (MDS). The Rapfish method was used to find out the index of sustainable level of the fishing activities from various dimensions, whereas MDS was used to know sustainable fishing management in South Sulawesi. The results of the research showed that based on the rapfish analyses that was carried out partially on every dimension the sustainable index value for each dimension was as follows: a) Ecological dimension was 49.07, which shows less sustainable, b) Economical dimension was 53.1, which means quite sustainable, c) Social dimension 60.93, which means quite sustainable, d) Institutional and ethical dimension 46.93, which means less sustainable, e) Technological and infrastructure dimension 48.35, which means less sustainable. From the research, it can be seen that the sustainable index value of fishing in South Sulawesi is less sustainable. The optimistic scenario is the model scenario for sustainable fishing management in South Sulawesi Province, since this scenario is the most realistic model development to be carried out in an integrated manner
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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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