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: Fuel Needs for Fishing Vessels at Palabuhanratu Nusantara Fishing Port
Abstrak: Fasilitas penyediaan Bahan Bakar Minyak (BBM) seperti Instalasi Bahan Bakar Minyak merupakan salah satu fasilitas fungsional pelabuhan perikanan. Namun nelayan masih kesulitan dalam mengakses BBM dengan harga normal dan stok yang tersedia tidak pasti. Tujuan penelitian ini yaitu mengidentifikasi jenis dan menghitung jumlah BBM yang dibutuhkan kapal perikanan di Pelabuhan Perikanan Nusantara (PPN) Palabuhanratu, mengidentifikasi jenis dan menghitung jumlah BBM yang disediakan penyalur BBM resmi, serta menentukan persediaan kebutuhan BBM dan merekomendasikan distribusi BBM yang baik bagi nelayan di PPN Palabuhanratu. Metode analisis yang digunakan yaitu analisis deskriptif dan analisis matematika sederhana. Hasil penelitian menunjukkan bahwa nelayan PPN Palabuhanratu membutuhkan BBM jenis solar dan bensin. Kebutuhan solar subsidi oleh kapal ≤ 30 GT sebesar 533.398 liter selama satu tahun. Kebutuhan solar industri sebanyak 2.556.000 liter dalam setahun. BBM jenis bensin yang dibutuhkan sebesar 233.034 liter dalam setahun. Rekomendasi untuk pendistribusian BBM yang lebih baik adalah melakukan penyederhanaan administasi perikanan agar mudah dalam mengakses BBM subsidi (satu identitas multifungsi), menggunakan perhitungan hasil penelitian untuk referensi kuota BBM dan membuka informasi akses kuota ketersediaan BBM untuk sektor perikanan pada setiap tempat pengisian BBM di sekitar PPN Palabuhanratu, dan membuat mekanisme terstruktur dan pengawasan ketat untuk pembelian BBM subsidi dan non subsidi., Facilities for providing fuel, such as installation of fuel is one of the functional facilities of fishing ports. Fishermen still have difficulty in accessing fuel at normal prices and the available stock is uncertain. The purposes of this study are to identify the type and calculate the amount of fuel needed by fishing vessels at the NFP Palabuhanratu, identify the type and calculate the amount of fuel provided by official fuel distributors, and determine the supply of fuel needs and recommend a good distribution of fuel for fishermen in NFP Palabuhanratu. The analytical method used was descriptive analysis and simple mathematical analysis. The results showed that fishermen in NFP Palabuhanratu needed diesel and gasoline. The need for subsidized diesel by ships ≤ 30 GT were 533.398 liters a year. Industrial diesel needs as much as 2.556.000 liters in a year. The type of gasoline needed were 233.034 liters in a year. Recommendations for better fuel distribution are simplifying fisheries administration so that it is easy to access subsidized fuel (one multifunctional identity), using research results calculations to reference fuel quotas and opening information on fuel availability quota access for the fisheries sector at each official fuel distributors around NFP Palabuhanratu, and create a structured mechanism and strict supervision for the purchase of subsidized and non-subsidized fuel.
Keyword: fuel, gasoline, fishing vessels, NFP Palabuhanratu, diesel fuel

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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