Judul: Bahan kebutuhan melaut perikanan pancing rumpon di PPN Palabuhanratu Sukabumi
Abstrak: Rumpon (Fish Aggregating Devices/FADs)-based fishing has begun to be expanded by fishermen at the Palabuhanratu, especially at the Gulf Palabuhanratu since 2004. One of the fishing tools that used on FADs is trolling lines, known as FADs fishing by fisherman communities at PPN Palabuhanratu. And the fishing supplies have had important role in supporting fishing activities. So the objective of the research was to determine the scale of the type, cost, mapping, and development strategies of supply/distribution of fishing supplies on FADs fishing at PPN Palabuhanratu. The method used was descriptive method with case studies. Type and cost of fishing supplies on FADs fishing per trip at PPN Palabuhanratu is 500 liters diesel fuel at a cost of IDR 2.274.000; 54 ice blocks at a cost of IDR 837.000; 442 liters clean water at a cost of IDR 17.800; and food stuff at a cost of IDR 880.000. Fishermen that use FADs obtain fishing supplies from inner and outer port which have varying distance from FADs fishing boat concentration : diesel fuel obtained from SPBB (is about 430 m), SPDN (is about 40 m), and SPBU (is about 200 m); ice blocks obtained from PT. Tirta Jaya (is about 2,43 miles) and PT. Sari Petojo (from the north is about 43,26 miles and from the south is about 42,66 miles); clean water is sourced from PDAM, maintained by CV. Eko Mulyo which is about 55 m; whereas food stuff obtained from market which is about 175 m. There are few challenges and threats in the development supply/distribution of FADs fishing supplies. The strategy that can be done by the suppliers/distributors of fishing supplies and PPN Palabuhanratu administrator is increasing the fishing supplies facility for FADs fishing at PPN Palabuhanratu.
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Judul: Efektivitas Pancing Terhadap Hasil Tangkapan Tuna Disekitar Rumpon yang Didaratkan di PPN Palabuhanratu Sukabumi
Abstrak: Research on the rumpon fishing for tuna catches was conducted in Palabuhanratu Sukabumi. Line fishing with rumpon (FADs) comprises with five type of fishing (trolling line, taber,coping,jerigen and fishing line with kites) which operate around rumpon. The objectives of the research are to determine the percentage composition of the tuna caught operated with rumpon and to examine the effectiveness of line fishing using rumpon in catching tuna. The survey method was used in the research and data collection is carried out by using purposive sampling. The results of this study indicate that catch of line fishing with rumpon consists of skipjack, yellowfin and bigeye with the total 24% which landed at PPN Palabuhanratu. The proportion of skipjack is 40.6%, yellowfin 37.6% and bigeye 21.6%. Effectiveness of line fishing with rumpon was obtained of 24% with the highest effectiveness of tuna catch in August around 58% and the lowest value in December at 9%.
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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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